Gear Teeth Comprise Rolling Bodies Patents (Class 475/168)
  • Patent number: 12158195
    Abstract: A reduction gear W1 that is configured to reduce a rotation speed input to an input shaft 1, and output the reduced rotation speed from an output shaft, the reduction gear including: an inner trochoid 8 that has a wavy curved surface formed on an inner circumferential side surface thereof; an inner trochoid holder 9 that is designed to hold the inner trochoid 8; an outer trochoid 3 that has a wavy curved surface formed on an outer circumferential side surface thereof; a rotation restriction unit that is designed to restrict rotation of the outer trochoid 3 around an axis thereof; and an output pin 9 that is pinched between the outer circumferential side surface of the outer trochoid 3 and the inner circumferential side surface of the inner trochoid 8.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: December 3, 2024
    Assignee: NITTAN CORPORATION
    Inventors: Michihiro Kameda, Yasuhiro Horiuchi
  • Patent number: 12044299
    Abstract: A harmonic ring gear system can include at least one inner gear with external toothing, the at least one inner gear defining an axis of rotation; at least one outer gear with internal toothing arranged concentrically to the at least one inner gear about the axis of rotation, the internal toothing spaced apart from the external toothing; a pin ring positioned between the at least one inner gear and the at least one outer gear, the pin ring comprising a multiplicity of pins; and a rotary transmitter configured to lift a portion of the pins of the multiplicity of pins off the external toothing and press the portion of the pins into the internal toothing.
    Type: Grant
    Filed: August 18, 2023
    Date of Patent: July 23, 2024
    Assignee: TQ-SYSTEMS GMBH
    Inventor: Antonius Georg Rossberger
  • Patent number: 12013012
    Abstract: The present invention relates to a cycloidal speed reducer and a manufacturing method thereof, and more particularly, to a thin cycloidal speed reducer and a manufacturing method thereof that are capable of achieving a thin structure through an input member with a hollow portion.
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: June 18, 2024
    Assignee: BONSYSTEMS CO., LTD.
    Inventor: Chang-Hyun Kim
  • Patent number: 11912170
    Abstract: A hinge comprising a first and a second plate intended to be connected respectively to a first and to a second vehicle seat element, the first plate comprising a base toothed portion with N teeth, a plurality of sets of rolling elements, each radially movable between at least one locking position, in which the rolling element is at least partially engaged in a space between two teeth, and an unlocking position in which the rolling element is disengaged from the space, a plurality of movable cams, each cooperating with the rolling elements of a different set, so as to cause the rolling elements to transition from their unlocking position to a locking position, and vice versa, and a control hub, able to move the cams.
    Type: Grant
    Filed: June 27, 2022
    Date of Patent: February 27, 2024
    Assignee: FAURECIA Sièges d'Automobile
    Inventor: Michel Timon
  • Patent number: 11808333
    Abstract: A rotary machine employing a heterodyne transmission includes: a central axle; a planetary gear set comprising a sun gear journaling the central axle and a plurality of planet gears surrounding and intermeshed with the sun gear; and a plurality of rotating clusters, each of the rotating clusters comprising a rotating central body and a plurality of rotating eccentric bodies surrounding and intermeshed with the rotating central body, wherein the rotating central body is coupled to a respective one of the planet gears, and wherein each of the rotating eccentric bodies has a center of mass off-axis with respect to its axis of rotation.
    Type: Grant
    Filed: April 19, 2023
    Date of Patent: November 7, 2023
    Inventor: Anthony A. Gallistel
  • Patent number: 11692614
    Abstract: A hollow reducer for high precision control includes a pin wheel housing and two-stage reduction components disposed in the pin wheel housing. A first-stage reduction component includes a driving wheel on a servo motor, a dual gear, and a planet wheel; and a second-stage reduction component includes 2-3 eccentric shafts distributed uniformly, cycloidal gears, a pin, rigid disks, and bearings, wherein two eccentric sections of the eccentric shaft support the cycloidal gears by means of the bearings, shaft extensions on two sides of the eccentric section of the eccentric shaft are supported on the left and right rigid disks by the bearings, and the rigid disks are supported on two sides of the pin wheel housing by the bearings.
    Type: Grant
    Filed: November 17, 2021
    Date of Patent: July 4, 2023
    Assignee: SUZHOU HUAZHEN INDUSTRY RV REDUCER CO., LTD.
    Inventor: Weiwei Liu
  • Patent number: 11506261
    Abstract: A gear device includes an outer cylinder; an internal member at least partially housed in the outer cylinder and configured to rotate relative to the outer cylinder about a predetermined rotation axis; a first main bearing fitted into an annular space formed between the outer cylinder and the internal member; and a second main bearing fitted into the annular space and configured to define the rotation axis in cooperation with the first main bearing. A distance between a first intersection where a load action line of the first main bearing intersects with the rotation axis and a second intersection where a load action line of the second main bearing intersects with the rotation axis is set to fall within a range expressed by a predetermined inequality expression.
    Type: Grant
    Filed: September 23, 2019
    Date of Patent: November 22, 2022
    Assignee: NABTESCO CORPORATION
    Inventors: Shunsuke Yoshida, Kazuya Furuta, Tomohiko Masuda
  • Patent number: 11486469
    Abstract: A cycloid speed reducer includes an input shaft, a rolling assembly, a first cycloid disc, a second cycloid disc, a first crankshaft, a second crankshaft, a first output disc and a second output disc. The first cycloid disc and the second cycloid disc are disposed around the input shaft and rotated with the input shaft. The first cycloid disc and the second cycloid disc are located at two opposite sides of the rolling assembly, respectively. The first crankshaft includes a first concentric end and a first eccentric end. The first eccentric end is linked with the first cycloid disc. The second crankshaft includes a second concentric end and a second eccentric end. The second eccentric end is linked with the second cycloid disc. The first output disc is linked with the first concentric end. The second output disc is linked with the second concentric end.
    Type: Grant
    Filed: July 29, 2021
    Date of Patent: November 1, 2022
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Chi-Wen Chung, Hung-Wei Lin
  • Patent number: 11441642
    Abstract: A reduction assembly, attachable to a torque limiting device, comprising a drive shaft having an input segment, an eccentric segment, and an output segment, wherein the input segment and the output segment each have a centerline running along a same first axis, and wherein the eccentric segment has a center line running along a second axis, the second axis being parallel to the first axis and positioned a first distance away from the first axis. The assembly further comprising a disk assembly having a disk with a body, a plurality of lobes positioned concentrically on the body, and an opening extending through the body, the opening configured to slidably engage the eccentric segment of the drive shaft. The assembly further comprising a disk receptacle configured to engage with the disk, the receptacle having a floor and a wall with a plurality of protrusions extending from the wall, wherein the number of the plurality of protrusions is equal to one more than the number of the plurality of lobes on the disk.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: September 13, 2022
    Assignee: ECA Medical Instruments
    Inventor: David A. Tory
  • Patent number: 11365786
    Abstract: A multi-speed transmission (01) having a px and having a zx is described. The px is equipped with a sun wheel (84) and at least one planet wheel (08). The cycloidal gear stage equipped with a ring gear (02) with a ring gear axis (20), at least one cycloidal disk (05, 06) rolling in the ring gear, with at least one off-center opening and with a number, equivalent to the number of planet wheels (08), of shared off-center eccentric shafts (03), each connected nonrotatably with a planet wheel (08) and located jointly rotatably around the ring gear axis (20) and having a number of eccentric portions (31, 32), equivalent to the number of vbs (05, 06), which are each supported rotatably in a respective off-center opening of the at least one cycloidal disk (05, 06).
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: June 21, 2022
    Assignee: Kimex Group S.R.O.
    Inventor: Tibor Fecko
  • Patent number: 11359670
    Abstract: The present invention provides a transmission roller, a pin-teeth cycloid reducer with the same and a bearing. The transmission roller comprises a hollow roller which is made by spirally and closely winding a steel strip or a steel wire, and the length of the hollow roller remains unchanged when both ends thereof distributed along the axial direction are squeezed. When the hollow roller is subjected to external pressure, the ends thereof will not be easily damaged, and will not extend to the middle part during use, thus having a long service life.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: June 14, 2022
    Assignee: QUANTA MACHINERY CO., LTD.
    Inventors: Zijian Sun, Meizhu Zheng, Xueyun Peng, Lianxin Zhang
  • Patent number: 11336147
    Abstract: A speed reducing device includes a motor and a speed reducing mechanism. The speed reducing mechanism includes at least one roller assembly, a cycloid disc, at least one fixing disc and a positioning assembly. The roller assembly is disposed within a rotor portion of the motor. While the roller assembly is rotated with the rotor portion, the roller assembly is eccentrically revolved. The roller assembly includes a wheel disc and at least one roller. The cycloid disc includes a main body and at least one cycloid tooth structure. The cycloid tooth structure is protruded from an outer periphery of the main body and in contact with the corresponding roller. While the roller assembly is eccentrically revolved, the at least one cycloid tooth structure is pushed against the corresponding roller, so that the cycloid disc is correspondingly rotated.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: May 17, 2022
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Chi-Wen Chung, En-Yi Chu, Hung-Wei Lin, Ming-Li Tsao
  • Patent number: 11320037
    Abstract: One object is to provide a speed reducer that can absorb or relieve an impact acting thereon. A speed reducer of the present invention includes: a speed reducing unit a housing that houses the speed reducing unit and a shock absorbing means that allows the speed reducing unit to move with respect to the housing in a direction of a rotary shaft of the speed reducing unit.
    Type: Grant
    Filed: August 8, 2019
    Date of Patent: May 3, 2022
    Assignee: NABTESCO CORPORATION
    Inventors: Yoshiaki Makizoe, John Verzemnieks, Hideshi Shimada
  • Patent number: 11168763
    Abstract: A two-stage cycloid speed reducer comprises two rotating disc assemblies. Each rotating disc assembly comprises two cycloid discs. In other words, the cycloid speed reducer has four cycloid discs to be in contact with the corresponding rollers. Consequently, the load withstood by each cycloid disc is reduced. Since the cycloid speed reducer has stronger structural strength, the cycloid speed reducer can be applied to the high-load circumstance. Moreover, an eccentric assembly of the eccentric device includes a plurality of eccentric cylinders. The eccentric cylinders are disposed within the axle holes of the corresponding cycloid discs. Due to the eccentric cylinders, the eccentric direction of two cycloid discs is opposite to the eccentric direction of the other two cycloid discs. Consequently, it is not necessary to install an additional weight compensation device in the cycloid speed reducer to compensate the dynamic equilibrium. Moreover, the cycloid speed reducer can be assembled easily.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: November 9, 2021
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Chi-Wen Chung, En-Yi Chu, Hung-Wei Lin, Ming-Li Tsao, Ching-Hsiung Tsai
  • Patent number: 11105397
    Abstract: A gear module includes: an external gear eccentrically rotating and having a plurality of teeth formed along an outer peripheral surface thereof; and an internal gear having a plurality of grooves formed along an inner peripheral surface thereof, wherein each groove and each pin come into contact with each other with two contact points, and each groove is formed concavely from an overlapping portion between a first circular sector having a first curvature radius r1 larger than a curvature radius of each pin and a first circular arc coming into contact with one contact point and a second circular sector having a second curvature radius larger than the curvature radius of each pin and a second circular arc coming into contact with another contact point, the first curvature radius and the second curvature radius passing through a center point of each pin and having the same size as each other.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: August 31, 2021
    Assignee: ROBOTIS CO., LTD.
    Inventors: Hyoung Chul Nam, Byoung Soo Kim, Wook Jang
  • Patent number: 11078991
    Abstract: A planetary gear device includes: a first internal gear and a second internal gear, a first external gear which meshes with the first internal gear, a second external gear which meshes with the second internal gear, and an eccentric body which circumferentially moves the first external gear and the second external gear. The first external gear and the second external gear each independently have external teeth and are connected to each other to integrally rotate with each other, the first internal gear and the second internal gear each independently have internal teeth, one of the first internal gear and the second internal gear is connected to a stationary side, and the other thereof is connected to an output side, and each of the first internal gear and the second internal gear has internal teeth which are constituted by a support body, and a rotating body rotatable to the support body.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: August 3, 2021
    Assignee: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventor: Toshiya Nagumo
  • Patent number: 11028909
    Abstract: The improved gearbox mechanism of the present invention includes a plurality of cam-actuated simplified gear block assemblies, which transfer power from a power shaft to a secondary or output gear element. Each gear block assembly includes a gear block having a surface that periodically interfaces with a secondary or output gear element. In a preferred embodiment the interface surface comprises a plurality of projections or teeth which correspond to complementary projections or gear teeth on the output gear element. Each gear block assembly further includes a gear block, a torque lever arm, cam followers and/or a socket, which connect or link the gear block to a cam assembly, which in turn is connected to a power source. The cam assembly includes about its circumference a unique pathway or groove for each linkage assembly of a particular gear block assembly so that the movement of the gear block may be controlled in two dimensions in accordance with a certain design parameter.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: June 8, 2021
    Assignee: MOTUS LABS, LLC
    Inventor: Carlos A. Hoefken
  • Patent number: 11028910
    Abstract: The improved gearbox mechanism of the present invention includes a plurality of cam-actuated gear block assemblies, which transfer power from a power shaft to a secondary or output gear element. Each gear block assembly includes a gear block having a surface that periodically interfaces with a secondary or output gear element. In a preferred embodiment the interface surface comprises a plurality of projections or teeth which correspond to complementary holes, projections or gear teeth on the output gear element. Each gear or torque block assembly further includes pivot assemblies, which connect or link the torque block to a cam assembly, which in turn is connected to a power source. The cam assembly comprises a set of corresponding cam elements arranged in a tandem configuration and having a unique circuitous pathway or groove formed therein so that the movement of the torque block may be controlled in three dimensions in accordance with a certain design parameter.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: June 8, 2021
    Assignee: MOTUS LABS, LLC
    Inventor: Carlos A. Hoefken
  • Patent number: 11015685
    Abstract: The gearbox mechanism includes a plurality of cam-actuated rocker block assemblies, for transferring power to an output gear. Each rocker block assembly includes a gear pad having a surface that periodically interfaces with the output gear. The interface surface comprises a plurality of projections which correspond to complementary projections on the output gear. Each rocker block assembly further includes a gear pad, a rocker arm, cam followers and/or path followers, which connect or link the rocker block to a cam assembly, which in turn is connected to a power source. The cam assembly includes about its circumference a unique pathway or groove for each cam followers and/or a second unique pathway or groove in the cam's planar surface for the pathway follower so that the movement of the gear block may be controlled in two or three dimensions in accordance with a certain design parameter.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: May 25, 2021
    Assignee: MOTUS LABS, LLC
    Inventors: Carlos A. Hoefken, Barry F. Koch
  • Patent number: 10926792
    Abstract: A cycloidal gear pair reducer including an input shaft, mounted in a reducer casing such that it rotates about an axis referred to as “main axis”, an eccentric member carried by the input shaft and rotated by the latter, at least one cycloidal disc rotatably mounted on the eccentric member and having a cycloidal toothing, at least one ring gear provided with a receiving toothing with which the cycloidal toothing of the cycloidal disc meshes, and an output shaft; wherein the reducer comprises a suspension device arranged to return elastically the cycloidal toothing of the cycloidal disc and the receiving toothing of the ring gear towards one another such that the meshing backlash between the cycloidal disc and the ring gear is self-adjusted along at least one radial component relative to the main axis.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: February 23, 2021
    Assignee: JTEKT EUROPE
    Inventor: Laurent Rey
  • Patent number: 10670121
    Abstract: The retainer is provided so as to be prevented from being rotatable with respect to the rotary shaft, and rotation of the input-side rotary member is reduced in speed and transmitted to the output-side rotary member through intermediation of the balls which engage with both of the ball engagement grooves. A raceway center line of the second ball engagement groove is formed of a wave-shaped curve. When a speed reduction ratio of the speed reducer is represented by “i”, the wave-shaped curve has such a shape that the balls which engage with the first ball engagement groove engage with the second ball engagement groove at a given rotation angle (?) of the input-side rotary member in a state in which the output-side rotary member is at a rotation angle (i?).
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: June 2, 2020
    Assignee: NTN CORPORATION
    Inventors: Taisuke Igi, Hirokazu Ooba, Takashi Nozaki
  • Patent number: 10612635
    Abstract: A wobble gear system is provided with an arrangement of gear elements that permits a motive input to drive planet gear elements to increase the gear reduction ratio while maximizing efficiency of the wobble gear system. The wobble gear system may have eccentrically rotating or oscillating wobble elements including a wobble plate and compound planet gear elements that are non-collinear and may be driven by the motive input, increasing the realized gear ratio in a single stage without reducing efficiency. One wobble gear system embodiment may employ a plurality of ring-supported and driven compound planet gear elements with laterally offset non-collinear central axes to optimize eccentricity and enhance gear reduction ratios. The wobble gear system may be integrated with components of a vehicle drive wheel driven by an in-wheel motor to produce speeds and torques required to drive vehicles including automobiles and aircraft.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: April 7, 2020
    Assignee: Borealis Technical Limited
    Inventor: Jonathan S. Edelson
  • Patent number: 10359098
    Abstract: A cycloidal differential includes a driven body, first and second cycloidal drives, and a coupling plate. The first cycloidal drive is disposed on a first side of the driven body and has a first input member rotationally fixed to the driven body and a first output member configured to connect with a first half shaft. The second cycloidal drive is disposed on a second side of the driven body and has a second input member rotationally fixed to the driven body and a second output member configured to connect with a second half shaft. The coupling plate is supported for rotation within the driven body and is connected to each of the first and second cycloidal drives.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: July 23, 2019
    Assignee: SCHAEFFLER TECHNOLOGIES AG & CO. KG
    Inventor: Guihui Zhong
  • Patent number: 10344826
    Abstract: A gear device is provided with inner-tooth pins fitted into pin grooves of an outer cylinder, a carrier housed inside the outer cylinder, a crankshaft rotatably supported on the carrier, an oscillating gear having outer teeth meshable with the inner-tooth pins and configured to oscillate in conjunction with rotation of the crankshaft, while the outer teeth are meshed with the inner-tooth pins, and a restriction member configured to restrict movement of the inner-tooth pins in an axial direction. The restriction member is mounted to the outer cylinder on an outer side of the outer cylinder.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: July 9, 2019
    Assignee: NABTESCO CORPORATION
    Inventors: Masahiro Takahashi, Yuto Nakai, Koji Nakamura
  • Patent number: 10288149
    Abstract: A transmission device is provided in which a first speed change portion and a second speed change portion are formed. The first speed change portion includes an eccentric shaft having a main shaft portion on a first rotary axis and an eccentric shaft portion on a second rotary axis disposed eccentrically with respect to the first rotary axis; an eccentric unit that is rotatably supported on the eccentric shaft portion, and has external teeth formed on an outer peripheral portion thereof; and a housing having an axial center on the first rotary axis, and having internal teeth that mesh with the external teeth of the eccentric unit. The second speed change portion includes curved wave grooves respectively formed on the eccentric unit and a rotary unit; and rolling elements sandwiched between the curved wave grooves and moving along an orbit defined by the curved wave grooves.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: May 14, 2019
    Assignee: Musashi Seimitsu Industry Co., Ltd.
    Inventor: Shinya Matsuoka
  • Patent number: 10184544
    Abstract: Examples are provided that describe a cycloid transmission with a chain link ring. An example cycloid transmission includes a motor shaft attached to a disc. The motor shaft may be used for rotating the disc. The cycloid transmission also comprises an outer chain link ring that surrounds the disc. The outer chain link ring includes rollers that are inserted at given interfaces between links of the outer chain link ring. The rollers contact the disc as the disc rotates. The cycloid transmission also comprises a housing. The links of the outer chain link are coupled at the given interfaces. The rollers are inserted at the given interfaces and into the housing.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: January 22, 2019
    Assignee: X DEVELOPMENT LLC
    Inventor: Brenton Edward Piercy
  • Patent number: 9903443
    Abstract: An eccentric speed variator includes a first rotor, a second rotor, a third rotor, a cylindrical pin, and a flange. The second rotor has a hole formed therein. The third rotor rotates eccentrically to change a relative rotation phase between the first and second rotors. The cylindrical pin extends through the hole of the second rotor to establish mechanical engagement between the second and third rotors. The flange is secured to or integrally formed with an end of the cylindrical pin. In operation, when the flange contacts the outside wall of the second rotor, it serves to minimize inclination of the third rotor relative to the second rotor, thereby reducing local friction between the second and third rotors to eliminate undesirable mechanical vibration or noise. This structure also enables parts of the cycloidal speed reducer to be decreased, which leads to a reduced size of the cycloidal speed reducer.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: February 27, 2018
    Assignee: DENSO CORPORATION
    Inventors: Yukihiro Honda, Hiroshi Okada, Akinori Kuwayama
  • Patent number: 9856945
    Abstract: Each of gear teeth of an external gear has a tooth-bottom portion, a tooth-middle portion and a tooth-front portion. The tooth-middle portion is operatively engaged with an internal gear. A cross-sectional shape of the tooth-bottom portion is formed by a hypocycloid curved line. A cross-sectional shape of the tooth-middle portion is formed by an epicycloid curved line. A cross-sectional shape of the tooth-front portion is formed by a first predetermined curved line, which is located at a position closer to a first pitch circle of the external gear in a radial-inward direction from a reference epicycloid curved line. The reference epicycloid curved line is continuously connected to each of the curved lines of the tooth-middle portion at both circumferential sides of each gear tooth. As a result, the tooth-front portion is so formed that a part of the tooth-front portion is escaped in the radial-inward direction from the reference epicycloid curved line.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: January 2, 2018
    Assignee: DENSO CORPORATION
    Inventors: Toru Tabuchi, Seiji Nakayama
  • Patent number: 9797493
    Abstract: An actuator for adjusting a seat includes a motor, a gear-box, and an output member. The gear-box includes a casing accommodating a two stage gear train connecting the motor to the output member. The gear train has a first and second transmission mechanisms. The first transmission mechanism includes a worm on a shaft of the motor, and a worm wheel meshed with the worm. The second transmission mechanism is a movable teeth gear transmission mechanism and has an eccentric wheel that rotates with the worm wheel, an internally toothed ring gear fixed to the casing, a fluted disc with radial grooves formed in its outer periphery, and rollers mounted in the radial grooves. The eccentric wheel drives the rollers to mesh with the ring gear to rotate the fluted disc, to drive the output member.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: October 24, 2017
    Assignee: JOHNSON ELECTRIC S.A.
    Inventors: Jing Ning Ta, Xue Qian Xu, Guo Ping Zhang
  • Patent number: 9625005
    Abstract: A speed reducer includes a first transmission shaft, an eccentric wheel, a first roller assembly, a rotating wheel, a second roller assembly and a second transmission shaft. The rotating wheel includes a main body and an axle hole. The main body includes a convex structure and a concave structure. The convex structure is protruded from an outer periphery of the main body and has outer teeth. The outer teeth are contacted with the corresponding first rollers. The concave structure is concavely formed in a surface of the main body and includes inner teeth. The inner teeth are contacted with plural second rollers of the second roller assembly. Since the speed reducer is designed to have four operating situations, the speed reducer can have various reduction ratios.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: April 18, 2017
    Assignee: DELTA ELECTRONICS, INC.
    Inventor: Ching-Hsiung Tsai
  • Patent number: 9490679
    Abstract: A wheel driving device includes a speed reducer for transmitting rotation of an electric motor to a hub ring supporting a vehicle wheel after reducing its speed. The speed reducer is a cycloid speed reducer including an external gear, and an internal gear meshing with the external gear and rotationally fixed to the speed reducer casing through a rotational fixing arrangement which is also capable of elastically supporting the internal gear. The rotational fixing arrangement absorbs, by elastic deformation, vibration of the internal gear due to torque transmitted from the external gear to the internal gear, thereby preventing the vibration of the internal gear from being transmitted to the speed reducer casing.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: November 8, 2016
    Assignee: NTN CORPORATION
    Inventors: Ken Yamamoto, Minoru Suzuki
  • Patent number: 9206881
    Abstract: A rigid speed reducer with internal and external tooth profile tooth-enveloping. The rigid speed reducer includes first- and second-level speed-reducing mechanisms. The first-level speed-reducing mechanism includes: an eccentric gear; rotary arm bearing; externally-meshing curved gear; and gear pins fixed on a first supporting frame and externally meshed with the externally-meshing curved gear. The second-level speed-reducing mechanism includes: an eccentric transmission gear; rotary arm bearing; internally-meshing curved gear, which is internally meshed and fitted with the gear pin; and an output disk linked with an output shaft. The eccentric transmission gear is in transmission connection with the externally-meshing curved gear through a dowel pin. The internally-meshing curved gear is in transmission with the output disk through a transmission pin.
    Type: Grant
    Filed: March 2, 2013
    Date of Patent: December 8, 2015
    Assignee: ZHEJIANG HENGFENGTAI REDUCER MFG.CO., LTD
    Inventors: Xiangdong Kong, Shengkang Ye
  • Patent number: 9103211
    Abstract: A method for manufacturing roller pockets in a stator of a gerotor device generally includes providing a stator having a cavity including a generally cylindrical section defining a central axis and a plurality of roller pockets angularly spaced around a periphery of the cylindrical section. Each roller pocket is configured to receive a respective roller, which acts as an internal tooth of the gerotor device. Each roller pocket defines a generally cylindrical roller pocket bearing surface. The method further includes grinding each roller pocket bearing surface of each roller pocket with a grinding wheel rotating about a rotational axis perpendicular to the central axis. A stator for a gerotor device is also described.
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: August 11, 2015
    Assignee: White Drive Products, Inc.
    Inventor: Hollis N. White, Jr.
  • Patent number: 9097322
    Abstract: An eccentric oscillating gear device comprises a crankshaft 46 having an eccentric portion 46a, 46b, an externally toothed gear 48a, 48b having external teeth and a through-hole in which the eccentric portion 46a, 46b is inserted, an outer cylinder 12, and a carrier 14. The carrier 14 rotatably supports the crankshaft 46. The outer cylinder 12 has internal teeth 24 meshed with the external teeth of the externally toothed gear. The eccentric oscillating gear device is provided with rotational phase adjusting means 58 for setting an orientation of the crankshaft 46 about an axis thereof, on the basis of orientations of the outer cylinder 12 and the carrier 14 about an axis thereof.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: August 4, 2015
    Assignee: NABTESCO CORPORATION
    Inventor: Koji Nakamura
  • Patent number: 9005065
    Abstract: A two-stage differential cycloidal speed reducer with a high reduction ratio is provided, including: a plurality of supporting crank shafts; an input shaft including a first crank shaft portion and a second crank shaft portion; a first cycloidal gear provided on the first crank shaft portion; a second cycloidal gear provided on the second crank shaft portion and connected with the first cycloidal gear through the supporting crank shafts; a plurality of first ring pins provided around the outer circumference of the first cycloidal gear and in sliding contact with a plurality of teeth on the periphery of the first cycloidal gear; a first annular gear with the plurality of first ring pins; a plurality of second ring pins provided around the outer circumference of the second cycloidal gear and being in sliding contact with a plurality of teeth on the periphery of the second cycloidal gear; and a second annular gear with the plurality of second ring pins.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: April 14, 2015
    Assignee: Industrial Technology Research Institute
    Inventors: Chun-Hung Huang, Chang-Chia Hsieh, Jyh-Jone Lee, Cho-Chun Chiu
  • Patent number: 9005066
    Abstract: A motor assembly includes an electric motor and a speed reducing mechanism. The speed reducing mechanism includes: a housing; an internal gear supported by the inner diameter surface of the housing; eccentric disks capable of rotating inside the internal gear when the rotating shaft of the electric motor rotates; an output shaft having at the axial end thereof a cage rotatably disposed between the internal gear and the eccentric disks, the cage being arranged coaxially with the rotation axis of the eccentric disks; and rolling elements retained by the cage and meshing with internal teeth of the internal gear, the number of the rolling elements being smaller than the number of the internal teeth. The eccentric disks are provided on the rotating shaft of the electric motor.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: April 14, 2015
    Assignee: NTN Corporation
    Inventors: Koji Sato, Takahide Saito, Masafumi Nakakoji, Naotsugu Kitayama
  • Patent number: 8998763
    Abstract: A transmission has a housing having a main axis with a retaining element fixed in the housing and forming a set having a predetermined number of radially extending and angularly equispaced guides. An output element rotatable in the housing about the axis is formed with an array having a number smaller than the predetermined number of radially inwardly open recesses axially adjacent the guides. An input element rotatable in the housing about the axis has a radial outer and generally circular peripheral surface centered on an axis radially offset from the main axis. Respective transmission elements radially displaceable in the guide grooves between inner and outer positions each have a shaft extending substantially parallel to the axis with a guide section engaged and radially shiftable in the respective guide groove, a driven section engageable in the recesses, and a drive section radially engageable with the input-element surface.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: April 7, 2015
    Assignee: SMS Meer GmbH
    Inventor: Volker Wengenroth
  • Publication number: 20140371019
    Abstract: A gear unit has a washer which is provided at a position where the washer is able to come into contact with a retainer of roller bearings provided to each of adjacent eccentric parts in a crank shaft, and which regulates a movement of the roller bearing in an axial direction. A housing recess which houses the washer is formed on at least one face of the faces of adjacent oscillating gears facing each other. The housing recess includes an axial direction regulating surface which regulates movement of the washer in the axial direction, and a radial direction regulating surface which regulates movement of the washer in the radial direction.
    Type: Application
    Filed: August 23, 2012
    Publication date: December 18, 2014
    Applicant: NABTESCO CORPORATION
    Inventor: Hiroyuki Miyoshi
  • Patent number: 8900084
    Abstract: Provided is a gear device capable of resolving inconveniences such as abnormal wear that arises due to the relative misalignment between the internal gear pins and the external gear, and inhibiting an increase in the number of components. This gear device has an outer cylinder, internal gear pins, and a carrier. A plurality of pin grooves extending in the axial direction of the outer cylinder are formed on the inner peripheral face of the outer cylinder, and the internal gear pins are fitted in the pin grooves. The pin grooves are formed so that the length of the pin grooves becomes longer than the length of the internal gear pins. The carrier has a pair of pressing members which includes a pressing surface. The pressing surface is configured to regulate movement of the internal gear pins and an oscillating gear which includes external teeth in the axial direction.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: December 2, 2014
    Assignee: Nabtesco Corporation
    Inventors: Masanari Kato, Koji Nakamura
  • Publication number: 20140309068
    Abstract: A cycloid pinwheel reducer includes a housing, two cycloid pinwheels, a plurality of rollers, an output flange, and a first transmission assembly. The housing forms an inner teeth ring in an inner wall of the housing. The two cycloid pinwheels are received in the housing. Each cycloid pinwheel forms a meshing portion. The rollers roll in position between the housing and the meshing portions. The output flange is non-rotatably connected with the cycloid pinwheels. The first transmission assembly includes a first transmission gear, a second transmission gear meshed with the first transmission gear. The second transmission gear includes a base body, a second teeth portion positioned on the base body, a first eccentric portion, and a second eccentric portion. The second teeth portion is meshed with the first transmission gear. The two cycloid pinwheels is sleeved on the first and second eccentric portions respectively.
    Type: Application
    Filed: January 22, 2014
    Publication date: October 16, 2014
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
    Inventors: XIAO-MING XU, CHENG ZHANG
  • Publication number: 20140256496
    Abstract: A cycloid pinwheel speed reducer includes a first housing, two cycloidal gears, a plurality of rollers, an output shaft, a second housing, a mounting frame, an input gear, a transmission gear, and a first transmission shaft. The mounting frame includes a mounting portion, a first eccentric portion, and a second eccentric portion. The cycloidal gears are respectively sleeved on the first eccentric portion and the second eccentric portion. The second housing is sleeved on the mounting portion. The rollers are sandwiched between the second housing and the cycloidal gears. The transmission gear is rotatably mounted within the mounting portion and sleeved on the first transmission shaft, and meshes with the input gear and the first housing.
    Type: Application
    Filed: February 21, 2014
    Publication date: September 11, 2014
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
    Inventors: CHENG ZHANG, XIAO-MING XU
  • Patent number: 8823227
    Abstract: In a drive unit having at least one transmission stage (Ü) and one drive element (4) for driving with high power density, having a drive element (4), and element (8), and an output element (14), wherein a translation and transmission of a drive torque occurs between the drive element (4) and the output element (14) via a plurality of radially movable toothed segments (10), the drive element (4) is to be embodied as an electrical drive for the transmission stage (Ü).
    Type: Grant
    Filed: November 27, 2008
    Date of Patent: September 2, 2014
    Assignee: Wittenstein AG
    Inventor: Thomas Bayer
  • Patent number: 8814737
    Abstract: A wheel driving device includes: a reduction mechanism of which at least a part is disposed on an inside of a wheel; a casing; a relative rotation member rotating relative to the casing; a bearing disposed between the casing and the relative rotation member; and an oil seal sealing a space where the reduction mechanism is present, wherein an outer race of the bearing includes a main body portion of which an outer periphery is disposed on an inside of the casing, and an extending portion which extends from the main body portion in an axial direction and of which an outer periphery is exposed from the casing, and the oil seal abuts on the extending portion and the relative rotation member.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: August 26, 2014
    Assignee: Sumitomo Heavy Industries, Ltd.
    Inventor: Masayuki Ishizuka
  • Publication number: 20140228161
    Abstract: A speed reducer includes an internal gear, an input shaft coaxial with the internal gear, and an eccentric disk on the input shaft and rotatable inside the internal gear, and an eccentric disk on the input shaft and rotatable inside the internal gear. A cage at an end of an output shaft, coaxial with the input shaft, and rotatable between the internal gear and the eccentric disk has pockets fewer in number than the internal gear's internal teeth. Rollers are received in the respective pockets such that when the input shaft rotates once, the rollers circumferentially move by a distance equal to one internal tooth width, causing the output shaft to be rotated at a reduced speed. The root radius of the internal gear, the radius of the circumcircle of the rolling bearing, and the outer diameter of the rollers are determined such that roller gaps defined between the rollers and the tooth bottoms of the internal gear are controlled by reduce vibration.
    Type: Application
    Filed: September 5, 2012
    Publication date: August 14, 2014
    Inventors: Koji Akiyoshi, Koji Sato, Masafumi Nakakoji
  • Publication number: 20140162826
    Abstract: A motor assembly includes an electric motor and a speed reducing mechanism. The speed reducing mechanism includes: a housing; an internal gear supported by the inner diameter surface of the housing; eccentric disks capable of rotating inside the internal gear when the rotating shaft of the electric motor rotates; an output shaft having at the axial end thereof a cage rotatably disposed between the internal gear and the eccentric disks, the cage being arranged coaxially with the rotation axis of the eccentric disks; and rolling elements retained by the cage and meshing with internal teeth of the internal gear, the number of the rolling elements being smaller than the number of the internal teeth. The eccentric disks are provided on the rotating shaft of the electric motor.
    Type: Application
    Filed: July 11, 2012
    Publication date: June 12, 2014
    Inventors: Koji Sato, Takahide Saito, Masafumi Nakakoji, Naotsugu Kitayama
  • Patent number: 8684878
    Abstract: A speed reducer having rollers axially longer than its cage, includes coaxial input and output shafts with mutualy facing ends covered by a housing that supports an internal gear. An eccentric disk is mounted on an end of the input shaft to be located radially inwardly of, and rotatable relative to, the internal gear. A cage at the end of the output shaft is between the internal gear and a bearing fitted on the disk. The cage has pockets unequal in number to internal teeth of the internal gear. A roller in each pocket is rollable along the radially outer surface of the bearing outer race. The input shaft rotation is transmitted to the shaft at a reduced speed ratio determined by the number of the internal teeth. An annular recess is formed along the corner between the closed end and radially inner surfaces of the cage.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: April 1, 2014
    Assignee: NTN Corporation
    Inventors: Koji Sato, Koji Akiyoshi
  • Publication number: 20140018203
    Abstract: A two-stage differential cycloidal speed reducer with a high reduction ratio is provided, including: a plurality of supporting crank shafts; an input shaft including a first crank shaft portion and a second crank shaft portion; a first cycloidal gear provided on the first crank shaft portion; a second cycloidal gear provided on the second crank shaft portion and connected with the first cycloidal gear through the supporting crank shafts; a plurality of first ring pins provided around the outer circumference of the first cycloidal gear and in sliding contact with a plurality of teeth on the periphery of the first cycloidal gear; a first annular gear with the plurality of first ring pins; a plurality of second ring pins provided around the outer circumference of the second cycloidal gear and being in sliding contact with a plurality of teeth on the periphery of the second cycloidal gear; and a second annular gear with the plurality of second ring pins.
    Type: Application
    Filed: April 10, 2013
    Publication date: January 16, 2014
    Applicant: Industrial Technology Research Institute
    Inventors: Chun-Hung HUANG, Chang-Chia HSIEH, Jyh-Jone LEE, Cho-Chun CHIU
  • Patent number: 8602936
    Abstract: An automobile driving system includes an engine and a transmission. The transmission includes a variable gear ratio mechanism and a gear ratio of the transmission can be set to infinity. A one-way clutch is provided at an output portion of the transmission. At a time of a engine stopping controller controlling to stop the engine, a transmission-and-control device uses inertia from the engine up to an input member of the one-way clutch as assisting force for driving operations of the variable gear ratio mechanism to change the gear ratio at the transmission to infinity or close to infinity, before the engine actually stops.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: December 10, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kazuki Ichikawa, Fumiyasu Suga
  • Patent number: 8591519
    Abstract: A surgical instrument for applying a rotational force to a structural element during a surgical procedure. The instrument may be designed for increasing an input force to produce an enlarged output force adequate for fracturing an excess section of the elongated element from a remainder of the structural element. The instrument may include an input mechanism that receives an external rotational input force, a cycloidal gear system that multiples the input force, and an output mechanism that attaches to and delivers the multiplied rotational output force to the excess section of the structural element. The output mechanism may also be configured to capture the separated excess section. The instrument may include a housing and a handle for grasping and manipulating during the surgical procedure.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: November 26, 2013
    Assignee: Warsaw Orthopedic, Inc.
    Inventors: Bradley E. Steele, Thomas V. McGahan, Jacob R. Zimmerman
  • Patent number: 8562473
    Abstract: There is provided a speed reducer incorporating portion structure for a plurality of industrial machines in which an eccentric oscillating type speed reducer having an internal gear and an external gear that rotates in an oscillating manner while internally meshing with the internal gear is incorporated. The speed reducer may be incorporated in the plurality of industrial machines, respectively, so that the position of a meshing portion when the external gear is assembled to the internal gear has a specific phase relationship common to the plurality of industrial machines with respect to a specific part of an industrial machine in which the speed reducer is incorporated.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: October 22, 2013
    Assignee: Sumitomo Heavy Industries, Ltd.
    Inventors: Tetsuzo Ishikawa, Takashi Haga, Yoshitaka Shizu