And Sun Gear Patents (Class 475/342)
  • Patent number: 10441441
    Abstract: Driving modules, motion assistance apparatuses including at least one of the driving modules, and methods of controlling at least one of the motion assistance apparatus may be provided. For example, a driving module including a driving source on one side of a user and configured to transmit power, an input side rotary body connected to the driving source and configured to rotate, and a first decelerator and a second decelerator configured to operate using the power received from the driving source through the input side rotary body, wherein a gear ratio from the input side rotary body to an output terminal of the first decelerator differs from a gear ratio from the input side rotary body to an output terminal of the second decelerator, may be provided.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: October 15, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jeonghun Kim, Minhyung Lee, Hyun Do Choi, Se-gon Roh, Youn Baek Lee, Jongwon Lee, Byungjune Choi
  • Patent number: 10240382
    Abstract: A scissor drive includes two legs which can be pivoted relative to one another about a pivot axis, each having a longitudinal axis and designed to be connected to an external component, and a motor/gear assembly that drives the relative pivoting movement of the two legs. The first leg includes a housing that is hollow at least in portions, a cavity defined in the hollow housing extending at least in portions along the longitudinal axis of the first leg, and the motor/gear assembly being received in the housing of the first leg at least in portions in the portion of the cavity that extends along the longitudinal axis of the first leg.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: March 26, 2019
    Assignee: Stabilus GmbH
    Inventors: Peter Oster, Mathias Wieland
  • Patent number: 10177692
    Abstract: This variable electric motor system comprises an electrically powered device and a planet gear transmission device. One of a sun gear shaft, a planet gear carrier shaft, and an internal gear carrier shaft of the planet gear transmission device constitutes an output shaft, another shaft constitutes a constant-speed input shaft, and the other shaft constitutes a variable-speed input shaft. The electrically powered device includes: a constant-speed electric motor including a constant-speed rotor that rotates about the axis, and that is connected to the constant-speed input shaft; and a variable-speed electric motor including a variable-speed rotor that rotates about the axis, and that is connected to the variable-speed input shaft. The variable-speed rotor has a shaft insertion hole formed therethrough in the axial direction, the shaft insertion hole having a cylindrical shape centered on the axis. The constant-speed rotor is inserted through the shaft insertion hole.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: January 8, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Masahiro Kobayashi, Yoshiyuki Okamoto, Yasushi Mori
  • Patent number: 10128781
    Abstract: This variable electric motor system comprises an electrically powered device and a planet gear transmission device. One of a sun gear shaft, a planet gear carrier shaft, and an internal gear carrier shaft of the planet gear transmission device constitutes an output shaft, another shaft constitutes a constant-speed input shaft, and the other shaft constitutes a variable-speed input shaft. The electrically powered device includes: a constant-speed electric motor including a constant-speed rotor that rotates about the axis, and that is connected to the constant-speed input shaft; and a variable-speed electric motor including a variable-speed rotor that rotates about the axis, and that is connected to the variable-speed input shaft. The variable-speed rotor has a shaft insertion hole formed therethrough in the axial direction, the shaft insertion hole having a cylindrical shape centered on the axis. The constant-speed rotor is inserted through the shaft insertion hole.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: November 13, 2018
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Masahiro Kobayashi, Yoshiyuki Okamoto, Yasushi Mori
  • Patent number: 10090787
    Abstract: This variable electric motor system comprises an electrically powered device and a planet gear transmission device. One of a sun gear shaft, a planet gear carrier shaft, and an internal gear carrier shaft of the planet gear transmission device constitutes an output shaft, another shaft constitutes a constant-speed input shaft, and the other shaft constitutes a variable-speed input shaft. The electrically powered device includes: a constant-speed electric motor including a constant-speed rotor that rotates about the axis, and that is connected to the constant-speed input shaft; and a variable-speed electric motor including a variable-speed rotor that rotates about the axis, and that is connected to the variable-speed input shaft. The variable-speed rotor has a shaft insertion hole formed therethrough in the axial direction, the shaft insertion hole having a cylindrical shape centered on the axis. The constant-speed rotor is inserted through the shaft insertion hole.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: October 2, 2018
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Masahiro Kobayashi, Yoshiyuki Okamoto, Yasushi Mori
  • Patent number: 9920818
    Abstract: Provided are gearboxes including compound planet gear assemblies as well as methods of using such gearboxes. A gearbox includes at least a first ring gear and a second ring gear. Depending on the current gear selection, one of these ring gears may be engaged with a shifting mechanism or not engaged with any ring gears when in a neutral gear. The first ring gear may be constantly engaged with a first planet gear of a compound planet gear assembly, while the second ring gear may be constantly engaged with a second planet gear of the same compound planet gear assembly. The first planet gear may be also engaged with a sun gear coupled to a shaft. Another shaft is coupled to the shifting mechanism. Different gear selections of the gearbox engage different ring gears to the shifting mechanism thereby changing the rotational speed ratio of the two shafts.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: March 20, 2018
    Assignee: Wrightspeed, Inc.
    Inventor: Ian Wright
  • Patent number: 9822843
    Abstract: A planetary gear box assembly includes a plastic gear box housing and a first and a second monolithic housing part. The first-stage and second-stage housing parts each have an end face on one axial end of the housing part, and a surrounding wall. A first-stage ring gear is formed inside the surrounding wall of the first-stage housing part, and a second-stage ring gear is formed inside the surrounding wall of the second-stage housing part. The planetary gear box assembly has a planetary gear carrier with a generally cylindrical carrier body with a cylinder wall and a window extending through the cylinder wall. The window is axially adjoined by a first and a first radial pocket. The first and first radial pockets are radial indentations in a radially outer surface of the cylinder wall and accommodate planetary shaft ends of planetary gears.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: November 21, 2017
    Assignee: Hi-Lex Controls, Inc.
    Inventor: Fred Eberle
  • Patent number: 9562601
    Abstract: A gear transmission system (20) comprising at least a first cylindrical gear (21) and a second cylindrical gear (22). Each of the first and the second cylindrical gears (21, 22) comprise a plurality of teeth (23, 26). The teeth (23) of the first cylindrical gear (21) having a first tooth flank (24) for contacting a first tooth flank (27) of the teeth (26) of the second cylindrical gear (22) according to a predefined first contact line (30). The first tooth flanks (24, 27) of the teeth (23, 26) of each of the first and second cylindrical gears (21, 22) have a tooth shape and tooth properties determined by the predefined first contact line (30).
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: February 7, 2017
    Assignee: ZF Wind Power Antwerpen N. V.
    Inventors: Bert Beirinckx, Joerg Litzba
  • Patent number: 9565622
    Abstract: A wireless communication method embeds service related information, including a version of a service associated with the service related information, within an initial wireless access message. The method may also include broadcasting the initial wireless access message including the embedded service related information. Another aspect of the present disclosure includes a wireless communication method that indentifies service related information embedded within an initial wireless access message. The method may also establish a connection with an access node of the wireless communication network to receive a service when a version of a service associated with the service related information satisfies a predetermined condition.
    Type: Grant
    Filed: July 5, 2012
    Date of Patent: February 7, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Kiran S. Chikkappa, Patrik N. Lundqvist, Gang Ding, Padmapriya Jagannathan
  • Patent number: 9434032
    Abstract: A method for manufacturing a carrier assembly of a stacked planetary gear set is provided. The method includes forming the inner and outer spiders and attaching the spiders to a back plate or to each other to form the carrier assembly. One or both of the inner and outer carrier spiders are formed from powdered metal, by precision casting, and/or by stamping. The stacked planetary gear set may be axially aligned or axially offset.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: September 6, 2016
    Assignee: GM Global Technology Operations, LLC
    Inventors: Leonid Basin, Carlos E. Marin, Gary H. Paelicke
  • Patent number: 9097317
    Abstract: A high ratio epicyclic gear train (A) with improved load carrying capability for transmitting power from a driven input shaft, such as may be driven by a turbine engine or engines, to a output shaft, as may be coupled to a rotor of a rotary wing aircraft. The compound epicyclic gear train incorporates a load sharing mechanism consisting of a drive sun gear (10), an idler sun gear (11), a ring gear (12), a set of drive planet gear assemblies (13), a set of idler planet gear assemblies (14), and a planet carrier assembly (15) coupled to provide at least two power pathways through said epicyclic gear train (A) between said driven input shaft and said output shaft to provide an improved overall power density of the transmission.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: August 4, 2015
    Assignee: The Timken Company
    Inventors: Xiaolan Ai, Curt Orkin, Randy P. Kruse, Ryan Forbes, Matthew Wilmer
  • Publication number: 20150111692
    Abstract: A planetary gearbox, also known as an epicyclical gearbox is disclosed herein. The gearbox includes multiple rows of planets and a ring gear. The sun gear is a single unitary structure which simultaneously engages the multiple rows of planets. The system lowers the stress level on torque generating devices incorporating such a gearbox.
    Type: Application
    Filed: October 15, 2014
    Publication date: April 23, 2015
    Applicant: Torq Fusion LLC
    Inventor: Radu Saftoiu
  • Patent number: 8821339
    Abstract: A sun gear member, planetary gear members, a first ring gear member, and a second ring gear member together form a paradox gear mechanism. A clutch mechanism is disposed between an input gear member and the first ring gear member. The clutch mechanism rotates the first ring gear member, when the input gear member rotates. The clutch mechanism disconnects transmission of the power to the input gear member when the first ring gear member rotates. The sun gear member and the first ring gear member are individual input elements. When one of the sun gear member and the first ring gear member exclusively rotates, the second ring gear member rotates in accordance with the rotation. The sun gear transmits power more reliably without increasing manufacturing cost and without thwarting downsizing of the product.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: September 2, 2014
    Assignee: Tamron Co., Ltd.
    Inventors: Masashi Shinya, Takashi Tamura
  • Patent number: 8137231
    Abstract: An automatic transmission for an electric vehicle hub includes an external motor rotor fixedly connected with a motor shaft; a sun gear; at least three first planet gears; and at least three second planet gears coaxially fixed with the corresponding first planet gears and which are engaged with the sun gear. The first and the second planet gears are respectively engaged with first and second internal gears, and the second internal gear has a diameter greater than that of the first internal gear. The rotating disk is arranged between the first internal gear and the second internal gear, and a hub is fixed to exterior of the rotating disk. The automatic transmission further includes a clutch device, making the rotating disk and the first internal gear contact with each other for a transmission of slower rpm, and when the rpm reaches critical, at a high-speed rotation.
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: March 20, 2012
    Assignee: Fairly Bike Manufacturing Co., Ltd.
    Inventor: Xiang-Yi Lin
  • Patent number: 8057351
    Abstract: A planetary gear device having two sun gears with different diameters that engage with double planet gears having a first gear teeth area, which interacts with the fist sun gear, and a second gear teeth area, which interacts with the second sun gear. The double planet gears are continuous helical gear wheels. The crown circle diameters of the gear teeth areas of the double planet gears and the crown circle diameters of the sun gears are adapted such that the pitch circle diameters between the double planet gears and the sun gears are arranged in the center between the crown circle diameters and the effective root diameters of the gear teeth areas of the double planet gears and the sun gears.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: November 15, 2011
    Assignee: ZF Friedrichshafen AG
    Inventors: Franz-Josef Joachim, Karl Benkler, Klemens Humm, Klaus-Peter Brenner
  • Patent number: 8016893
    Abstract: A gear bearing drive provides a compact mechanism that operates as an actuator providing torque and as a joint providing support. The drive includes a gear arrangement integrating an external rotor DC motor within a sun gear. Locking surfaces maintain the components of the drive in alignment and provide support for axial loads and moments. The gear bearing drive has a variety of applications, including as a joint in robotic arms and prosthetic limbs.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: September 13, 2011
    Assignees: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration, Northeastern University
    Inventors: Brian Weinberg, Constantinos Mavroidis, John M. Vranish
  • Patent number: 7753817
    Abstract: An arrangement in a planetary gearing includes a rotatable shaft connected to the planet wheel carrier of planet wheels, an internal gear and a sun wheel, wherein the planet wheels operatively engage by their coggings, i.e. mesh, with the outermost fixed-position cogging of the internal gear and with the centrally located cogging of the sun wheel. The power is transmitted from the sun wheel to the input shaft of the following stage by a coupling permitting radial and/or angular deflection. The lubrication system includes a connection permitting rotation and deflection between the frame and the planet wheel carrier.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: July 13, 2010
    Assignee: Moventas Oy
    Inventors: Ari Ryymin, Timo Yrjönen
  • Publication number: 20100173742
    Abstract: An epicyclic gearbox includes a shell, a sun gear assembly and a planet gear assembly. The shell is in the form of a drum formed with plain teeth on an internal side. The sun gear assembly for operative connection to a motor, the sun gear assembly includes a sun gear formed with bevel teeth. The planet gear assembly includes a spider for operative connection to a passive device. The planet gears are supported on the spider. Each planet gear includes plain teeth for engagement with the plain teeth of the shell and bevel teeth for engagement with the bevel teeth of the sun gear.
    Type: Application
    Filed: January 8, 2009
    Publication date: July 8, 2010
    Inventor: Robin C.S. Chang
  • Patent number: 7662061
    Abstract: The transmission comprises a sun gear fixed to an input shaft, four pinions, and a carrier part connected to an output shaft. Each pinion has a planetary gear engaged with the sun gear, and planetary gears having the number of teeth different from that of that planetary gear. Each internal gear engaged with these planetary gears can perform a independent rotating motion by the rotation of the input shaft. The braking force is selectively applied to the rotating motion of each internal gear by pressing breaking part by the actuator in selecting a gear for gearshift. Here, the braking force is gradually increased to stop the rotating motion. As a result, the a power interrupter becomes unnecessary and the miniaturization of the transmission can be attained.
    Type: Grant
    Filed: January 4, 2007
    Date of Patent: February 16, 2010
    Inventor: Takafumi Nagao
  • Patent number: 7651436
    Abstract: A gear mechanism having extremely less backlash, capable of suppressing the rattling noise of gears, having a large loading resistance in the thrust direction, and capable of transmitting high torque by using the gears transmitting a force by the meshing of the gears with each other in place of the transmission of the force by friction. The gear mechanism is formed by disposing the plurality of spur gears in the meshed state with each other. The screw-like gears (2) and (4) are disposed on the same axis as the spur gears (1) and (3) in the meshed state with each other. The screw-like gears (2) and (4) adjacent to each other are formed in screw shapes having lead angles extending in the reverse directions to each other and equal in angle to each other. The spur gear (1) and the screw-like gear (2) are rotated integrally with each other to transmit its rotation to the spur gear (3) and the screw-like gear (4) adjacent to each other.
    Type: Grant
    Filed: June 7, 2005
    Date of Patent: January 26, 2010
    Inventor: Nobuyoshi Sugitani
  • Patent number: 7604560
    Abstract: This planetary roller driving device includes: a planetary roller speed up gear having a first carrier being a first input axis and a first sun roller being a first output axis; a planetary roller reduction gear having a second sun roller being a second input axis and a second carrier being a second output axis, the second input axis being joined with the first output axis; a roller ring driving mechanism; a housing which accommodates the planetary roller speed up gear, the planetary roller reduction gear, and the roller ring driving mechanism; a roller ring rotation control circuit which controls a rotation of the roller ring driving mechanism corresponding to an external environmental condition; and a torque-assisting mechanism which is provided in the housing and provides an assisting torque to the first input axis or the second output axis.
    Type: Grant
    Filed: April 18, 2006
    Date of Patent: October 20, 2009
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Isamu Shiotsu, Hiroyuki Sonobe, Takayoshi Hirayama
  • Publication number: 20090258753
    Abstract: The present invention relates to automatic transmissions and gear trains. In particular, the instant invention relates to an automatic transmission gear train with improved resistance to deterioration with an increased effective life. The gear train of the instant invention comprises eight pinion gears assembled into one carrier utilizing a forward and a rear sun gear, a ring gear, a band drum and a one way roller clutch.
    Type: Application
    Filed: May 19, 2009
    Publication date: October 15, 2009
    Inventors: Scott R. Dalenberg, Theodore V. Kachel, John W. Creighton
  • Patent number: 7568993
    Abstract: A planetary gear train having planetary gears (8) which are rotatably mounted on a planet carrier (18) and are in toothed contact with an internally toothed ring gear (14) and a sun gear (4). For a simplified, process-safe and inexpensive backlash of the planetary gears (8) without axial displacement of the sun gear (4), the ring gear (14) and the planetary gears (8) are conically designed so that planetary gear axles (16) are retained in the planetary gear carrier (18) at an inclined angle (a) and that the planetary gears (8) are axially movably disposed upon and coordinated with the planetary gear axles (16) and the position of the planetary gears (8) can be adjusted within the planetary train by adjusting mechanisms for adjusting a backlash.
    Type: Grant
    Filed: January 15, 2005
    Date of Patent: August 4, 2009
    Assignee: ZF Friedrichshafen AG
    Inventors: Horst Schulz, Tino Kirschner
  • Publication number: 20090017952
    Abstract: A first rotary member rotates with a crankshaft and has a first gear. A second rotary member rotates with a camshaft and has a second gear that is axially shifted from the first gear. A planetary rotary member has third and fourth gears, which are eccentrically meshed respectively with the first and second gears to perform a planetary motion. A biasing member is interposed between the planetary rotary member and a planetary carrier, which supports the planetary rotary member. The planetary rotary member is in contact with the biasing member at a contact portion having an axial center. The axial center is located on a radially inner side of a meshed portion between the second and fourth gears, which has a backlash larger than that of a meshed portion between the first and third gears.
    Type: Application
    Filed: June 13, 2008
    Publication date: January 15, 2009
    Applicant: DENSO CORPORATION
    Inventors: Taei Sugiura, Yasushi Morii
  • Publication number: 20080280725
    Abstract: A planetary gear device having two sun gears with different diameters that engage with double planet gears having a first gear teeth area, which interacts with the fist sun gear, and a second gear teeth area, which interacts with the second sun gear. The double planet gears are continuous helical gear wheels. The crown circle diameters of the gear teeth areas of the double planet gears and the crown circle diameters of the sun gears are adapted such that the pitch circle diameters between the double planet gears and the sun gears are arranged in the center between the crown circle diameters and the effective root diameters of the gear teeth areas of the double planet gears and the sun gears.
    Type: Application
    Filed: November 16, 2007
    Publication date: November 13, 2008
    Applicant: ZF FRIEDRICHSHAFEN AG
    Inventors: Franz-Josef Joachim, Karl Benkler, Klemens Humm, Klaus-Peter Brenner
  • Publication number: 20080220922
    Abstract: There is provided a built-in type index table in which a power transmitting means scarcely has backlash and, at the same time, the space and cost can be saved. The index table includes a rotary table for setting a workpiece for a machine tool; a rotary table shaft fixedly provided on the rotary table; a driving motor mechanism, which is a driving source; and a planetary roller speed-reduction mechanism having a sun roller, which is a motor output shaft of the driving motor mechanism, a ring fixed to the speed-reduction mechanism, a plurality of planetary rollers arranged at equal angular intervals between the sun roller and the ring in a pressurized state, and a planetary roller harness that fixedly supports a plurality of planetary roller shafts pivotally supporting the planetary rollers in a rotatable manner and is fixedly provided coaxially with the rotary table shaft.
    Type: Application
    Filed: February 19, 2008
    Publication date: September 11, 2008
    Inventors: Toshifumi Katsuma, Michiaki Hashitani, Koichi Masuo, Takayoshi Hirayama
  • Publication number: 20080167157
    Abstract: An automatic transmission assembly is constructed or modified to minimize effects of wear thereon and maximize its operational life. The assembly includes a transmission case and has a modified ring-shaped center support that is to be secured against rotation within the transmission case. A center support plate, which is attachable to and detachable from the ring-shaped center support, includes protrusions thereon that engage between cooperating protrusions defined on the transmission case to secure the ring-shaped center support against rotation within the transmission case. The invention is particularly useful when the modified ring-shaped center support is a worn, original equipment support that has deteriorated in function. A process of modifying an automatic transmission assembly is also described.
    Type: Application
    Filed: December 5, 2007
    Publication date: July 10, 2008
    Applicant: Axiom Automotive Technologies, Inc.
    Inventors: Jack Creighton, Scott Dalenberg, Grady Jackson Smith
  • Patent number: 7100870
    Abstract: In a vehicle, having a fixed supporting structure and a load movable relative thereto, a jam tolerant actuating system, a method for controlling this system including: Locating a physical coupling/decoupling mechanism between the load and an actuator assembly as close a practicable to the load; constructing the coupling/uncoupling mechanism to be reversible, and hence testable; and controlling the connection/disconnection via decision making electronics which will detect any system failure by monitoring, at a minimum: actuator main motor load and speed, and actuator output load. Also set forth are specific embodiments of pivotable rotary geared actuators as well as linear ball screw type actuators embodying the coupling/uncoupling mechanisms of this invention.
    Type: Grant
    Filed: August 17, 2004
    Date of Patent: September 5, 2006
    Assignee: Parker-Hannifin Corporation
    Inventor: James E. Flatt
  • Patent number: 7076875
    Abstract: A method is provided for manufacturing a compound helically toothed planet gear for a planetary gear set wherein the individual gear elements of the compound planet gear have different leads. The method identifies and utilizes the several factors affecting gear timing for compound helical planet gears having different leads to provide planet gears capable of attaining equal load share among the several gears of the planetary gear set. Specifically, the method of the present invention utilizes a mounting shoulder and bore axis to provide common locating features for use throughout the manufacturing process The method further provides for bore honing and removal of equal amounts of material from both sides of each gear tooth in the gear finishing process so as not to alter gear timing between the compound gear elements.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: July 18, 2006
    Assignee: Deere & Company
    Inventors: Craig Alan Puetz, Paul Warren Johnson
  • Patent number: 7033301
    Abstract: A gearset assembly includes a pinion carrier containing first, second and third long pinions pinion mutually spaced angularly about an axis, and supported for rotation on the carrier, and three pairs of short pinions, each supported for rotation on the carrier, the pinions of the first pair meshing with the first long pinion, the pinions of the second pair meshing with the second long pinion, and the pinions of the third pair meshing with the third long pinion.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: April 25, 2006
    Assignee: Ford Global Technologies, LLC
    Inventor: John Kimes
  • Patent number: 6966865
    Abstract: A high ratio, double helical epicyclic gear transmission that is primarily intended for use in rotary wing aircraft employs double helical planet gears to obtain a reduction in size of the transmission, to improve the safety of the transmission, and to reduce the noise created by operation of the transmission.
    Type: Grant
    Filed: November 10, 2003
    Date of Patent: November 22, 2005
    Assignee: The Boeing Company
    Inventors: Raymond J. Drago, Joseph W. Lenski Jr., Mark J. Robuck
  • Patent number: 6905434
    Abstract: A first planetary gear unit is arranged to convert an input rotation from an input shaft to an output rotation whose speed is lower than that of the input rotation. A first unit including second and third planetary gear units is arranged between the first planetary gear unit and the output shaft. The first unit manages the first planetary gear unit's output rotation and provides the output shaft with seven types of rotation which correspond to 6-forward speed and one reverse positions. A second unit is arranged between the first planetary gear unit and the first unit to manage a power transmission therebetween. One of the second and third planetary gear units is of a double ring type, each being meshed with the sun gear and inside and outside ring gears, and a pinion carrier carrying the pinions. The pinion carrier is connected to the output shaft to rotate therewith.
    Type: Grant
    Filed: June 12, 2003
    Date of Patent: June 14, 2005
    Assignee: Jatco LTD
    Inventors: Tsuyoshi Sugihara, Toshio Yamaguchi, Kazuo Oguri
  • Patent number: 6783478
    Abstract: A compound differential planetary gear assembly (50) includes a sun gear (52), a plurality of planet gears (53) engaging the sun gear, a plurality of first ring gears (54), and a plurality of second ring gears (55). Each of the second ring gears has a number of teeth that is different from the number of teeth of the first ring gears. The first and second ring gears are arranged alternately in an axial stack. Each planet gear has a constant gear-tooth cross-section along the length of the stack, with its gear teeth in meshing engagement with the teeth of the first and second ring gears. Loads transmitted between the first and second ring gears and the planets act in alternate directions along the length of the stack.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: August 31, 2004
    Assignee: Moog Inc.
    Inventor: Lowell V. Larson
  • Publication number: 20040053739
    Abstract: A compound differential planetary gear assembly (50) includes a sun gear (52), a plurality of planet gears (53) engaging the sun gear, a plurality of first ring gears (54), and a plurality of second ring gears (55). Each of the second ring gears has a number of teeth that is different from the number of teeth of the first ring gears. The first and second ring gears are arranged alternately in an axial stack. Each planet gear has a constant gear-tooth cross-section along the length of the stack, with its gear teeth in meshing engagement with the teeth of the first and second ring gears. Loads transmitted between the first and second ring gears and the planets act in alternate directions along the length of the stack.
    Type: Application
    Filed: September 13, 2002
    Publication date: March 18, 2004
    Applicant: Moog Inc.
    Inventor: Lowell V. Larson
  • Patent number: 6688787
    Abstract: A roller device includes a motor and a speed reducer inside a cylindrical roller or arranged coaxially, and an electronic apparatus includes a printer using the roller device. This roller device comprises a motor (5) disposed on a cylindrical roller (2), a sun gear (7), planet gears (8), a first inner tooth gear (10) provided inside of the cylindrical roller (2), and a second inner tooth gear (11) provided inside of a bearing element (12). The rotation of the bearing element (12) is suppressed by a predetermined force. Thus the rotation of the motor (5) is decelerated, and the cylindrical roller is rotated at a reduced speed. By rotating the bearing element with a force greater than a predetermined force, the cylindrical roller can be rotated manually.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: February 10, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd
    Inventors: Toru Arakawa, Masaaki Matsui, Kenji Nakasono, Toshio Tanaka
  • Patent number: 6632154
    Abstract: A gear train has a sun gear with a tooth count e, n (where n is a natural number of 2 or more) planetary gears having a first gear part with a tooth count z1 meshing with the sun gear and a second gear part with a tooth count z2, a fixed internal tooth gear with a tooth count I1 meshing with the first gear part of the planetary gears, and a movable internal tooth gear with a tooth count I2 meshing with the second gear part of the planetary gears, where tooth counts e, z1, z2, I1 and I2 are each a multiple of n. Even if the gear form of each gear has a small module, a planetary gear train mechanism can be configured without raising operating or assembly problems, and it can be miniaturized more than conventional gear trains while still have a sufficient gear reduction ratio.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: October 14, 2003
    Assignee: Seiko Epson Corporation
    Inventor: Kenichi Ushikoshi
  • Publication number: 20030139250
    Abstract: An electronic drive unit assembly independently drives each drivable wheel on a heavy-duty vehicle. The drive unit assembly includes a spindle that defines an inner chamber and which is mounted to a vehicle structure. A wheel hub is mounted for rotation relative to the spindle. An electric motor is mounted within the inner chamber and has an output shaft that is operatively coupled to a reduction gear assembly that is used to drive the wheel hub. The reduction gear assembly includes an inner ring gear mounted to the spindle and an outer ring gear mounted to the wheel hub. An inner set of planet gears is in meshing engagement with the inner ring gear and an outer set of planet gears is in meshing engagement with the outer ring gear. A planetary spider assembly rigidly connects the inner and outer sets of planet gears. The inner planet gears have a different number of teeth than the outer planet gears to achieve the desired gear reduction.
    Type: Application
    Filed: January 23, 2002
    Publication date: July 24, 2003
    Inventor: Larry W. Bowman
  • Patent number: 6550546
    Abstract: A hammer drill has a motor which drives an axially displaceable intermediate gear mounted in an intermediate gear arrangement. An impact mechanism is formed by including interacting impact cams between either the intermediate gear and the housing, or the motor armature shaft and the housing to generate a reciprocating motion on an output spindle or shaft. A spindle locking mechanism is included which causes an intermediate gear to be disengageable with respect to the output shaft, while still permitting the impact mechanism to be engaged. Such an arrangement allows the hammer drill to operate in a hammer-only or chipping mode.
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: April 22, 2003
    Assignee: One World Technologies, Inc.
    Inventors: James E. Thurler, John E. Nemazi, Ralph E. Smith
  • Patent number: 6540641
    Abstract: A mechanical paradox planetary speed reducer has an input shaft, a plurality of plantet gears, a pair of fixed internal sun gears, and a movable internal sun gear. The fixed internal sun gears are spaced from each other in the axial direction of the input shaft, and the movable internal sun gear is disposed between the fixed internal sun gears. The movable internal sun gear has outer flanges on opposite ends thereof and fitted over the ends of the fixed internal sun gears in sliding contact therewith, holding the movable internal sun gear and the fixed internal sun gears in concentric relation to each other.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: April 1, 2003
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventor: Kazuhiro Kishimoto
  • Patent number: 6499549
    Abstract: An electric drive axle for use in hybrid vehicles has an electric motor driving a compact gearbox. The gearbox includes a planetary reduction unit and a differential assembly. The planetary reduction unit has a sun gear driven by the electric motor, and compound planet gears supported from a planet carrier which have a first gear segment meshed with a fixed first ring gear and a second gear segment meshed with a second ring gear. The sun gear is also meshed with one of the first and second gear segments of the compound planet gears. The second ring gear drives the differential which transfer motive power to a pair of output shafts adapted for connection to one set of wheels. When used with a conventional engine-based powertrain for the other set of wheels, the electric drive axle establishes a four-wheel drive powertrain for the hybrid vehicle. The electric motor and gearbox are mounted in a common housing assembly to provide a compact drive axle assembly.
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: December 31, 2002
    Assignee: New Venture Gear, Inc.
    Inventors: Richard Mizon, Thomas C. Bowen
  • Patent number: 6378638
    Abstract: An electric drive axle for use in hybrid vehicles has an electric motor driving a compact gearbox. The gearbox includes a planetary reduction unit and a differential assembly. The planetary reduction unit has a sun gear driven by the electric motor, and compound planet gears supported from a planet carrier which have a first gear segment meshed with a fixed first ring gear and a second gear segment meshed with a second ring gear. The sun gear is also meshed with one of the first and second gear segments of the compound planet gears. The second ring gear drives the differential which transfer motive power to a pair of output shafts adapted for connection to one set of wheels. When used with a conventional engine-based powertrain for the other set of wheels, the electric drive axle establishes a four-wheel drive powertrain for the hybrid vehicle. The electric motor and gearbox are mounted in a common housing assembly to provide a compact drive axle assembly.
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: April 30, 2002
    Assignee: New Venture Gear, Inc.
    Inventors: Richard Mizon, Thomas C. Bowen
  • Patent number: 6348022
    Abstract: A planetary gear transmission apparatus includes a sun gear, a first inner gear ring, a second inner gear ring and a planetary gear set constitutes a plurality of planetary gears. The first inner gear ring has increased tooth space, increased tooth root and decreased tooth thickness. The second inner gear ring has decreased tooth space, decreased tooth root and increased tooth thickness. The first and second inner gear rings have substantially same size of tooth root circles. The planetary gear is cylindrical formed with an uniform diameter. The rotational contact surfaces between the components are curved plane contact. The apparatus may be made small size at a low cost and with no stress concentration. Friction loss is less. Transmission efficiency may be increased without overheating at high rotation speed.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: February 19, 2002
    Inventor: Wei A Jin
  • Publication number: 20010024991
    Abstract: A mechanical paradox planetary speed reducer has an input shaft, a plurality of plantet gears, a pair of fixed internal sun gears, and a movable internal sun gear. The fixed internal sun gears are spaced from each other in the axial direction of the input shaft, and the movable internal sun gear is disposed between the fixed internal sun gears. The movable internal sun gear has outer flanges on opposite ends thereof and fitted over the ends of the fixed internal sun gears in sliding contact therewith, holding the movable internal sun gear and the fixed internal sun gears in concentric relation to each other.
    Type: Application
    Filed: March 27, 2001
    Publication date: September 27, 2001
    Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHA
    Inventor: Kazuhiro Kishimoto
  • Patent number: 6232673
    Abstract: A wind-power plant with a rotor. The rotor's hub is accommodated in a roller bearing. The roller bearing is mounted on a support and connected to a planetary gear. The planetary gear comprises two stages, specifically an input stage and an output stage. The planetary gear's output shaft is coupled by way of a clutch to a generator. The roller bearing (3) has an inner ring (7) that is attached to and can be detached from both the hub (1) and the rotating part of the planetary gear. The generator (11) has a housing that is combined with and can be removed from the planetary gear to constitute a drive-train module. The module rests on the rotor support (4) and can be dynamically separated from the overall plant.
    Type: Grant
    Filed: April 11, 2000
    Date of Patent: May 15, 2001
    Assignee: A. Friedr. Flender AG
    Inventors: Alfred Schoo, Arno Klein-Hitpass
  • Patent number: 6220984
    Abstract: The planetary gear according to the invention comprises a sun gear (2) connected to a driven central shaft (20), a ring gear (12), a group of first stepped planetary gears (8, 10) and a group of second stepped planetary gears (4, 6). The large step wheels (4) of the second stepped planetary gears engage the sun gear (2), the small step wheels (6) of the second stepped planetary gears simultaneously engage a pair of adjoining large step wheels (8) of the first stepped planetary gears and all small step wheels (10) of the first stepped planetary gears engage the ring gear (12). The gear allows for high transmission ratios having a small size and low inertia moment and offers excellent properties in relation to efficiency and transmission reliability.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: April 24, 2001
    Assignee: 2F Friedrichshafen AG
    Inventors: Horst Schulz, Jürgen Pescheck
  • Patent number: 6129648
    Abstract: A planetary gear device (20) comprises a front-stage side planetary gear mechanism (21) and a rear-stage side planetary gear mechanism (23). The rear-stage side planetary gear mechanism (23) comprises an internal gear (25), a carrier (29) rotatably supported by a pair of main guide bearings (26,27) disposed on both sides of the internal gear (25), a plurality of planetary gears (31) rotatably supported on a plurality of planetary shafts (30) extending between a pair of carrier parts (28A,28B) of the carrier (29), a sun gear (33) formed on an outer circumferential surface of a pinion shaft extending in a direction of a device axial line (20a) to pass through the carrier (29), and an output shaft (34) connected to the carrier (29) and extending in the direction of the device axial line (20a).
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: October 10, 2000
    Assignee: Harmonic Drive Systems, Inc.
    Inventors: Yoshihiro Tanioka, Norio Shirokoshi, Hiroshi Nakagawa, Hiroshi Kameda, Harushige Aoyagi
  • Patent number: 6099433
    Abstract: A driving unit (1), comprising: a motor (10), a driven shaft (2) driven by the motor, and a transmission device (20) coupled between the motor and the output shaft and having one input shaft (21) and two rotational output members (22) and (23), wherein the ratio of transmission from the input shaft (21) to the first rotational output member (22) differs from the ratio of transmission from the input shaft (21) to the second rotational output member (23). The first rotational output member (22) is coupled to the motor housing (11) via a slip coupling (30). A helical spring (60) arranged so as to be coaxial to the motor presses the first rotational output member (23) against the motor housing (11), wherein that helical spring (60) engages the motor housing (11) via a pressure ring (50). This pressure ring (50) has a helical channel (52) for receiving the helical spring (60). The pressure ring (50) is rotatable to enable setting the maximum value of the moment that can be supplied to the output shaft (2).
    Type: Grant
    Filed: September 13, 1998
    Date of Patent: August 8, 2000
    Assignee: IKU Holding Montfoort B.V. et al.
    Inventor: Stefan Frits Brouwer
  • Patent number: 5957804
    Abstract: A planetary gear (1) in the form of a Wolfrom gear with a high transmission ratio. Such gears are preferentially used in handling gear engineering. In order to reduce the number of components required and improve the overall efficiency of the planetary gear, the step wheels (4, 6) of the step planet wheels (5) or the hollow wheels (11, 12) are conically toothed and have opposite conical inclinations. The planet carrier (10) is floating, that is, without a separate bearing. The planetary gear is used especially in industrial robots.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: September 28, 1999
    Assignee: ZF Friedrichshafen AG
    Inventors: Horst Schulz, Bernd Somschor
  • Patent number: 5833569
    Abstract: A drive train for transmitting torque produced by a motor to a load comprises a planetary gear arrangement mounted concentrically with respect to a tubular shaft. The planetary gear arrangement cooperates with a pair of driven gears which are also coaxial with the tubular shaft, the planetary gear arrangement and the pair of gears being located within an outer housing. The tubular shaft provides an unobstructed, large diameter passage through the drive train, the passage being available for the routing to a load connected to one of the driven gears of movable shafts, conduits or electrical conductors.
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: November 10, 1998
    Inventor: Adolf Schnell
  • Patent number: 5791204
    Abstract: A position detecting device includes a ring gear that is disposed on an outer side of an output shaft of a motor and rotates with the rotation of the output shaft, fixed contact terminals fixed to a cover plate, and a rotary contact terminal provided on a ring gear. As the ring gear rotates, the fixed contact terminals and the rotary contact terminal are brought into contact with each other, thereby detecting a rotational position of the output shaft. The position detecting device further includes a clutch mechanism for preventing the rotation of the ring gear by more than a predetermined degree while permitting the rotation of the output shaft of the motor in the state of contact. Hence, even if the output shaft of the motor is rotated sufficiently, this state of contact is maintained.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: August 11, 1998
    Assignee: Asmo Co., Ltd.
    Inventors: Katsuhiko Torii, Kengo Yamamura, Mitsuhiro Ikeya