Spur Gear Differential Patents (Class 475/248)
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Patent number: 12123484Abstract: The power transmission device includes a speed reducer and a differential. The speed reducer includes a sun gear fixed to a hollow input shaft, stepped pinions, first and second ring gears. The stepped pinion has input and output gears, with the input gear engaging the sun gear. A first ring gear is fixed to a housing and engages the input gear. The second ring gear engages the output gear. The differential has a differential housing and first and second output shafts. The differential housing is fixed to the second ring gear. The first and second output shafts are arranged concentrically with the input shaft and extend in opposite directions from the differential housing. One of the first output shaft and the second output shaft passes through the inside of the input shaft. The differential housing is positioned to be surrounded by the output gears of the stepped pinions.Type: GrantFiled: November 8, 2023Date of Patent: October 22, 2024Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shin Kurosaki, Hiroki Monji
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Patent number: 11846346Abstract: A gear unit includes an input shaft, output shafts and a differential having two planetary gearsets with a plurality of gearset elements. A first gearset element is connected to the input shaft, a second gearset element is connected to the first output shaft, and a third gearset element is connected to a gearset element of the second planetary gearset. A second gearset element of the second planetary gearset is connected to a housing, and a third gearset element of the second planetary gearset is connected to the second output shaft. A first output torque transmittable to the first output shaft. The gearset elements of the first planetary gearset and second planetary gearset have a helical toothing such that a torque is transmittable between the two output shafts.Type: GrantFiled: January 27, 2023Date of Patent: December 19, 2023Assignee: ZF FRIEDRICHSHAFEN AGInventors: Thomas Kölbl, Matthias Reisch, Michael Roske
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Patent number: 11807317Abstract: A method is for operating a vehicle. The vehicle includes a steering system with at least one steering handle and at least one steering sensor operatively connected to the steering handle and configured to at least detect a driver intervention in an automated drive operating mode. In at least one faulty operating state, in which the vehicle is in the automated drive operating mode and a malfunction and/or a disturbance of the steering sensor is ascertained and/or a steering sensor signal of the steering sensor is ascertained, the steering sensor signal correlating in particular to the driver intervention, an interruption process is initiated in order to discontinue the automated drive operating mode. During the interruption process, at least one wheel steering angle characteristic variable of at least one vehicle wheel of the vehicle is ascertained and taken into consideration while discontinuing the automated drive operating mode.Type: GrantFiled: September 28, 2020Date of Patent: November 7, 2023Assignee: Robert Bosch GmbHInventor: Reinhard Grossheim
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Patent number: 11674588Abstract: A differential case includes an outer shell wall portion configured to accommodate a pinion gear therein, and a first groove is formed in an inner surface of the outer shell wall portion on a back surface side of the pinion gear. In addition, a convex portion is formed on the inner surface of the outer shell wall portion on the back surface side of the pinion gear, and the first groove is formed in the convex portion. Further, a diameter of the convex portion is equal to or larger than a diameter of a back surface of the pinion gear.Type: GrantFiled: July 5, 2019Date of Patent: June 13, 2023Assignee: HITACHI ASTEMO, LTD.Inventors: Kenji Fukasawa, Fumio Ohshima
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Patent number: 11624433Abstract: A downsized differential assembly having a simple structure, which can be mounted easily on automobiles. The differential assembly comprises a set of first to third gears arranged coaxially while being allowed to rotate relatively to one another. A first eccentric gear meshes with the first gear, a second eccentric gear meshes with the second gear, and a third eccentric gear meshes with the third gear, while being supported by an eccentric member in such a manner as to rotate around an eccentric axis which is offset from a rotational axis. Gear ratios between the first to third gears and the first to third eccentric gears are set to different values so that rotational speeds of the first gear and the second gear are reduced slower than that of the eccentric member.Type: GrantFiled: September 1, 2021Date of Patent: April 11, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Hiroshi Isono
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Patent number: 11566687Abstract: A torque transfer device has plural planets arranged for planetary rotation about one or more sun gears and within one or more ring gears. Each planet includes at least one planetary gear set comprising plural planetary gears connected to rotate together, but having a different diameter to form a differential gear system. To improve load sharing, the plural planetary gears of each planetary gear set may have a different helical angle, the plural planetary gear sets being axially movable with respect to one another. Alternatively or in addition, the planetary gears may be made flexible with respect to radial forces.Type: GrantFiled: October 13, 2020Date of Patent: January 31, 2023Assignee: Genesis Advanced Technology Inc.Inventors: James Brent Klassen, Richard Bos
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Patent number: 11497155Abstract: A generator unit to be attached to a traveling vehicle that has a prime mover and a PTO shaft to transmit power from the prime mover, includes: a generator; an input shaft having: a first connector portion configured to be connected to the PTO shaft; and a second connector portion configured to be connected to a working device to be connected to the traveling vehicle; a transmitter mechanism to transmit, to the generator, power supplied from the PTO shaft, the power being inputted from the first connector portion to the input shaft; and an attachment frame having: an attachment portion to which the generator, the input shaft, and the transmitter mechanism are attached; and a mounting portion configured to be mounted to the traveling vehicle.Type: GrantFiled: June 24, 2020Date of Patent: November 15, 2022Assignee: KUBOTA CORPORATIONInventors: Sumio Yagyu, Takashi Uchida, Yukifumi Yamanaka, Go Takaki
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Patent number: 11466973Abstract: A rotation angle detection apparatus capable of reducing the cost and having a small thickness is provided. The rotation angle detection apparatus includes: a housing; a rotating shaft rotatably disposed in the housing; a first internal gear disposed concentrically with the rotating shaft and fixed to the housing; a second internal gear disposed concentrically with the rotating shaft, and rotatably disposed in the housing, the second internal gear having a number of teeth different from a number of teeth of the first internal gear; an external gear rotatably disposed at a position separated from the rotating shaft in rotating body, the external gear meshing with the first internal gear and the second internal gear; and a detection section that detects a rotation angle of the second internal gear.Type: GrantFiled: December 4, 2020Date of Patent: October 11, 2022Assignee: TOKYO COSMOS ELECTRIC CO., LTD.Inventors: Manabu Ichikura, Kentaro Higa
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Patent number: 11229963Abstract: A force and moment canceling reciprocating mechanism for a power-driven tool may include a transmission including an input gear assembly and an output gear assembly, coupled to a reciprocating mechanism. The input gear assembly may include a first input gear coaxially aligned with a second input gear. The output gear assembly may include a first output gear coaxially arranged with a second output gear. The reciprocating mechanism may be coupled to the output gear assembly, to convert rotational motion to linear motion, for output to an output accessory of the tool. One or both of the first and second input gears may include counterweights, or counterweight masses, and one or both of the first and second output gears may include counterweights, or counterweight masses. The counterweighting of the input and output gear assemblies may provide for the cancelation of forces and moments generated by the operation of the motor and the transmission, and the reciprocal motion of the reciprocating mechanism.Type: GrantFiled: June 24, 2019Date of Patent: January 25, 2022Assignee: Black & Decker Inc.Inventors: Christopher S. Mougeotte, David C. Tomayko, Bryce Yapps
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Patent number: 10883586Abstract: A planetary differential device includes first and second sun gears coaxially arranged in relation to each other and defining a main axis. First and second planetary gears mesh with the first and second sun gears and mesh with each other in pairs. A planet carrier has two side disks, and the planetary gears are rotatably arranged in the planet carrier. A coupling gear is arranged coaxially to the main axis and is rigidly connected to the planet carrier. The side disks are respectively connected to the coupling gear in a material fit and form a receiving housing with a housing inner space, at least one of the side disks includes an assembly opening through which the planetary gears and the sun gears can be inserted into the inner space of the housing.Type: GrantFiled: June 29, 2017Date of Patent: January 5, 2021Assignee: SCHAEFFLER TECHNOLOGIES AG & CO. KGInventors: Franz Kurth, Ralph Schimpf
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Patent number: 10876613Abstract: A differential gear for a motor vehicle, comprising an outer housing, the outer housing being drive-connected to an input element, an inner housing, the inner housing being mounted rotatably at least partially within the outer housing, at least two compensating elements and at least two output elements, the compensating elements and the output elements being enclosed at least partially by the inner housing, and the inner housing being drive-connected to the output elements via the compensating elements, and also at least one switching unit, the switching unit being arranged on the inner housing in such a way that, starting from a freewheeling position, it can selectively be drive-connected to the outer housing or to the outer housing and one of the two output elements.Type: GrantFiled: June 13, 2017Date of Patent: December 29, 2020Assignee: MAGNA POWERTRAIN GMBH & CO KGInventors: Martin Leitner, Bernhard Mühl
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Patent number: 10857877Abstract: A planet carrier for a planetary gear transmission for driving a wheel includes a housing for accommodating a sun wheel and planet wheels of a planetary gear transmission. The housing has an inner end and an opposite outer end. The inner end of the housing is provided with an inner end wall having an opening for receiving a drive shaft for driving the sun wheel. The outer end of the housing is provided with an outer end wall having through holes for mounting the planet wheels axially into the housing in the direction from the outer end towards the inner end.Type: GrantFiled: April 5, 2016Date of Patent: December 8, 2020Assignee: Volvo Construction Equipment ABInventors: Thomas Andersson, Lars Larsson, Ralf Nordström, Jonas Rubinsson
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Patent number: 10753449Abstract: It is an object to provide an axle driving device that can change a deceleration ratio while obtaining a high deceleration ratio, and reduces noise during operation to have high ease of assembly and coolability. A carrier of a planet gear mechanism includes a first plate-like member, a second plate-like member, and a third plate-like member, and the third plate-like member includes the plate-like portion and the second plate-like member, a plurality of stays extended from the plate-like portion and connected to the first plate-like member, and a plurality of stays extended from the plate-like portion and connected to the second plate-like member.Type: GrantFiled: February 14, 2019Date of Patent: August 25, 2020Assignee: HONDA MOTOR CO., LTD.Inventors: Eriko Yamamoto, Takahiro Kasahara
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Patent number: 10451162Abstract: The torque transmission device includes side gears having a same axis of rotation coupled to rear wheels, a case disposed around the outer circumferential side of the side gears, and rotating around the axis of the side gears, and a pinion gear rotatably supported by the case and engaged with the side gears in a straddling manner. The side gears are spur gears having a different number of teeth, and the pinion gear is a spur gear driven by a motor and having an axis of rotation that is parallel to the axis of rotation of the side gears. Forming the side gears and pinion gear from spur gears advantageously allows the side gears to be compactly arranged along their axis of rotation.Type: GrantFiled: September 29, 2015Date of Patent: October 22, 2019Assignee: NITTAN VALVE CO., LTD.Inventors: Takuya Furukawa, Michihiro Kameda
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Patent number: 9683636Abstract: A Ravigneaux planetary gear device includes a long pinion gear and a short pinion gear. A tooth of each of the long pinion gear and the short pinion gear has an end surface with curvature from an inner circumference side toward an outer circumference side of each of the long pinion gear and the short pinion gear and toward a center in a tooth width direction.Type: GrantFiled: February 24, 2016Date of Patent: June 20, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Daisuke Okamoto
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Patent number: 9593763Abstract: A gearing arrangement, comprising a planetary stage comprising a planet carrier arranged to rotate around a transmission shaft, a plurality of planet pins each planet pin comprising respective first and second end regions, planet gears arranged on the planet carrier and seated on the plurality of planet pins, and at least one sun gear, and a spur gear arranged to direct torque into the planet carrier, wherein the planet carrier comprises a cage element axially arranged on the spur gear, and the plurality of planet pins are arranged within the spur gear and radially supported in the cage element with the respective first end regions arranged to face the spur gear and the respective second end regions arranged to face away from the spur gear.Type: GrantFiled: June 30, 2014Date of Patent: March 14, 2017Assignee: Schaeffler Technologies AG & Co. KGInventors: Franz Kurth, Andreas Hofmann
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Patent number: 9115795Abstract: A planetary gear (1) such as a differential gear, with a planetary carrier (3) on which planetary wheels (5, 6) are rotatively connected, with at least one sun gear (9, 10, 11) in meshing engagement, whereby the planetary carrier (3) can be connected to a drive wheel (15) such as a spur wheel (16), whereby further comprising a rolling bearing (20) having an inner bearing ring (29) and an outer bearing ring (28) for the axial and/or radial positioning of the planetary carrier (3) with respect to a fixed housing such as a gear housing, characterized in that an outer bearing ring (28) between the inner bearing ring (29) and the planetary support (3) is forced as far as a seating region radially inwards of the planetary carrier (3) for connection to the planetary carrier (3).Type: GrantFiled: September 8, 2014Date of Patent: August 25, 2015Assignee: Schaeffler Technologies AG & Co. KGInventors: Thorsten Biermann, Harald Martini, Markus Mantau
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Patent number: 9045141Abstract: In a method for operating a vehicle which has a first axle, a second axle, a unit for determining slipping of at least one wheel of the second axle on a ground surface, and a braking device associated with the wheel, a drive torque is applied to the first axle and the second axle via a central differential, and, in the event of slipping of the wheel, a braking torque required to prevent the slipping being determined. A setpoint braking torque is set on the braking device, which is less than the required braking torque, and the part of the drive torque supplied to the first axle is increased.Type: GrantFiled: October 25, 2010Date of Patent: June 2, 2015Assignee: ROBERT BOSCH GMBHInventors: Oliver Dehren, Markus Beisswenger, Christian Haag
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Patent number: 9028358Abstract: An axle assembly having an axle housing assembly having a carrier housing and first and second end caps that are mounted to the carrier housing. The first end cap cooperates with the carrier housing to define a differential cavity for receipt of a differential assembly, while the second end cap cooperates with the carrier housing to define a clutch cavity for receipt of a clutch. A spindle drivingly couples a first output of the differential with an input of the clutch member. A first output member is coupled for rotation with a second output of the differential and a second output member is coupled for rotation with an output of the clutch. The spindle is received through a tubular portion of carrier housing.Type: GrantFiled: July 31, 2014Date of Patent: May 12, 2015Assignee: American Axle & Manufacturing, Inc.Inventors: Paul J. Valente, James P. Downs
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Publication number: 20150111685Abstract: The invention relates to a planetary gearbox comprising at least one sun gear (17, 18) and at least one planet carrier (5) arranged coaxially with and rotatably in relation to said gear, a combination of a bearing sleeve (40) and a slide ring (41) that is separate therefrom being located between the sun gear (17, 18) and the planet carrier (5). The invention also relates to a gearbox combination of a differential of the spur-gear differential type, in the form of which the planetary gearbox is configured, and an additional planetary stage, the spur-gear differential and the planetary stage preferably having a common planet carrier (5) composed of multiple planet sub-carriers (6, 7, 8) that are non-rotatably combined.Type: ApplicationFiled: March 28, 2013Publication date: April 23, 2015Inventors: Thorsten Biermann, Harald Martini, Inaki Fernandez
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Patent number: 8979699Abstract: A planetary gear system having at least two planetary steps, each of which is made up of at least one set of planets and one sun, whereby the teeth of the gearwheels in the planetary drive mesh with each other in such a way that, in each of the meshing points, at least one first tooth on a first toothing of first teeth positively engages into a tooth gap of a second toothing of second teeth. First teeth of the first toothing have a tooth flank profile concavely arched, and second teeth of the second toothing have a tooth flank profile convexly arched, so that the tooth flanks in contact with each other are arched in the same directions, at least when in contact.Type: GrantFiled: July 14, 2011Date of Patent: March 17, 2015Assignee: Schaeffler Technologies AG & Co. KGInventors: Thorsten Biermann, Tomas Smetana, Florian Doerrfuss
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Patent number: 8974340Abstract: A hybrid mechanism is provided, including: an engine, a first motor, a second motor, a clutch, a hybrid unit, a differential, and a battery. The clutch, the second motor and the engine are sequentially coupled to one end of the hybrid unit, and the first motor and the battery are coupled to the other end of the hybrid mechanism. The battery provides supplying currents to the first motor or the second motor or receives range-extend currents from the second motor. The hybrid unit includes a first sun gear, a second sun gear, at least one planetary gear coupled to the first and second sun gears, and a planet carrier coupled to the at least one planetary gear. The hybrid mechanism has four modes. The hybrid unit harmonizes the first driving force from the first motor and the engine and the second driving force from the second motor and outputs a harmonized driving force to the differential.Type: GrantFiled: December 4, 2013Date of Patent: March 10, 2015Assignee: Industrial Technology Research InstituteInventors: Yun-Jui Chung, Ching-Huei Wu, Sheng-Feng Tsai
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Publication number: 20150038280Abstract: A planetary gearbox (1, 101) having a differential gear (2, 102), having a planet carrier (3, 103) to which planet wheels (5, 6, 105) that are in meshed engagement with at least one sun gear (9, 10, 11, 106, 107) are rotatably connected, wherein the planet carrier (3, 103) can be connected to a drive wheel (15), wherein in addition a bearing (19, 108) having an inner bearing ring (29) and an outer bearing ring (28, 117) rotatably mounts the planet carrier (3, 103) in a stationary housing determining the axial and/or radial position of said carrier, wherein the outer bearing ring (28, 117) is rotatably fixedly connected to the planet carrier (3, 103) and the inner bearing ring (29) is connected to the stationary housing.Type: ApplicationFiled: October 17, 2014Publication date: February 5, 2015Inventors: Thorsten Biermann, Harald Martini, Inaki Fernandez
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Publication number: 20140378264Abstract: A planetary gear (1) such as a differential gear, with a planetary carrier (3) on which planetary wheels (5, 6) are rotatively connected, with at least one sun gear (9, 10, 11) in meshing engagement, whereby the planetary carrier (3) can be connected to a drive wheel (15) such as a spur wheel (16), whereby further comprising a rolling bearing (20) having an inner bearing ring (29) and an outer bearing ring (28) for the axial and/or radial positioning of the planetary carrier (3) with respect to a fixed housing such as a gear housing, characterized in that an outer bearing ring (28) between the inner bearing ring (29) and the planetary support (3) is forced as far as a seating region radially inwards of the planetary carrier (3) for connection to the planetary carrier (3).Type: ApplicationFiled: September 8, 2014Publication date: December 25, 2014Inventors: Thorsten Biermann, Harald Martini, Markus Mantau
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Publication number: 20140335992Abstract: A rotary power transfer disconnect device for use between first and second drive parts, with the first having an opening with teeth defined therein, and the second having external teeth located at least partially in the opening. A gap is located between the teeth so that the first drive part is rotatable relative to the second drive part. A sliding dog clutch having a spline sleeve with internal projections located on an inner periphery thereof that are engagable with the teeth on the outer periphery of the second drive part and external projections located on an outer periphery thereof that are engagable with the teeth on the inner periphery of the opening of the first drive part is slidable into the gap for driving engagement between the teeth and out of the gap to allow relative rotation between the first and second parts.Type: ApplicationFiled: April 23, 2014Publication date: November 13, 2014Applicant: SCHAEFFLER TECHNOLOGIES GMBH & CO. KGInventors: Brian Lee, Carsten Ohr
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Patent number: 8876649Abstract: Assuming that a direction in which a first member and a second member are arranged is a first direction and a direction orthogonal to the first direction is a second direction, a welding structure includes: a pressure fit portion; a first cavity; a second cavity; a first weld bead formed between the first cavity and an end of a joining part of the first member and the second member on one side in the second direction by welding the first member and second member while the second cavity is communicated with outside; a second weld bead formed between the second cavity and an end of the joining part on the other side in the second direction; and a cutout groove communicating between the first cavity and the second cavity.Type: GrantFiled: August 4, 2011Date of Patent: November 4, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Keisuke Uchida, Shingo Iwatani, Go Kuramoto, Jun Kamitake, Shuhei Yamaguchi, Takahito Endo, Shotaro Kato
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Patent number: 8864617Abstract: When a first output shaft (5) of a planetary differential reduction device (1) is driven to rotate, a first internal gear (24) of a first planetary reduction part (20) and a second internal gear (34) of a second planetary reduction part (30) are rotated in the same direction at the same speed, and a planetary carrier (63) of a third planetary reduction part (40) is also rotated in the same direction at the same speed, whereby a second output shaft (6) connected to the planetary carrier (63) is rotated synchronously with the first output shaft (5). When differential rotation is inputted to the second sun gear (31), a reduced rotational output is output to the planetary carrier (63) of the third planetary reduction part (40). The second output shaft (6) is added with the reduced rotational output for differential rotation, whereby the second output shaft (6) is shifted to a differential rotating state.Type: GrantFiled: June 29, 2012Date of Patent: October 21, 2014Assignee: Harmonic Drive Systems, Inc.Inventor: Norio Shirokoshi
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Patent number: 8734284Abstract: A differential with torque vectoring comprises a differential, two gear mechanisms, and two clutches. The engagement of one of the clutches and the corresponding gear mechanism provides a yaw movement in one direction or in the opposition direction. The engagement of both clutches and the corresponding gear mechanisms provides differential lock. The differential with torque vectoring can also functions as conventional open differential.Type: GrantFiled: October 7, 2013Date of Patent: May 27, 2014Inventor: Lei Yang
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Patent number: 8636616Abstract: A variable speed transaxle is disposed in a transaxle housing and drives a pair of axle shafts. A pair of clutch assemblies using a plurality of gears may be engaged to the axle shafts to selectively engage and drive each axle shaft. Each clutch assembly uses a ring gear having planet gears running on a gear form, a planet carrier for the planet gears engaged to the axle shaft, a first clutch dog selectively engageable to a first engagement structure to prevent rotation of the ring gear; and a second clutch dog selectively engageable to a second engagement structure to prevent rotation of the planet carrier and thereby provide a braking force to the axle shaft.Type: GrantFiled: June 10, 2013Date of Patent: January 28, 2014Assignee: Hydro-Gear Limited PartnershipInventor: Thomas J. Langenfeld
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Publication number: 20140004989Abstract: When a first output shaft (5) of a planetary differential reduction device (1) is driven to rotate, a first internal gear (24) of a first planetary reduction part (20) and a second internal gear (34) of a second planetary reduction part (30) are rotated in the same direction at the same speed, and a planetary carrier (63) of a third planetary reduction part (40) is also rotated in the same direction at the same speed, whereby a second output shaft (6) connected to the planetary carrier (63) is rotated synchronously with the first output shaft (5). When differential rotation is inputted to the second sun gear (31), a reduced rotational output is output to the planetary carrier (63) of the third planetary reduction part (40). The second output shaft (6) is added with the reduced rotational output for differential rotation, whereby the second output shaft (6) is shifted to a differential rotating state.Type: ApplicationFiled: June 29, 2012Publication date: January 2, 2014Applicant: HARMONIC DRIVE SYSTEMS, INC.Inventor: Norio Shirokoshi
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Publication number: 20130274056Abstract: Infinitely variable motion control (IVMC) provides motion control without any requirement for changing gears or use of a clutch. A spur gear transgear, defined as a system having an input, an output and a control, a variable pitch cam having an eccentric inner and outer cam assembly and a driver may be used to form a speed converter. The speed converter is used in various forms to provide an infinitely variable transmission, a differential, embodiments of wind and river turbines and pumps/compressors. In one embodiment, the speed converter drives first and second directional control assemblies to provide a vehicle with zero turn radius. A variable torque converter may be used in various embodiments to control torque from a minimum to a maximum by controlling movement of a rotor along a shaft in relation to a stator.Type: ApplicationFiled: June 12, 2013Publication date: October 17, 2013Applicant: DIFFERENTIAL DYNAMICS CORPORATIONInventor: Kyung Soo Han
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Publication number: 20130217533Abstract: A vehicle driving system includes, a first drive shaft and a second drive shaft; a differential mechanism; a drive input member which inputs a power from a driving power source to the differential mechanism; and a fastening member that fastens the differential mechanism and the drive input member together, wherein the differential mechanism includes: a first sun gear; a second sun gear; a first pinion gear; a second pinion gear that is engaged to the second sun gear and the first pinion gear; and a carrier that is fastened to the drive input member and rotatably supports the first pinion gear and the second pinion gear; and, wherein a spline joint portion that causes the carrier and the drive input member to be fitted in a spline manner is provided at an outer peripheral end portion of the carrier and an inner peripheral end portion of the drive input member.Type: ApplicationFiled: February 12, 2013Publication date: August 22, 2013Applicant: HONDA MOTOR CO., LTD.Inventor: HONDA MOTOR CO., LTD.
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Patent number: 8475321Abstract: A differential assembly having a gearset, which has first and second side gears and a plurality of pinion sets, and a case assembly. Each pinion set has a first pinion meshingly engaged to the first side gear, and a second pinion meshingly engaged to both the second side gear and the first pinion gear. The case assembly has a case structure, a case cover and a gearset mount. The case structure defines a cavity into which the gearset mount is received. The gearset mount defines a plurality of first pinion bores into which the first pinions are received, a plurality of second pinion bores into which the second pinions are received and a side gear pocket into which the first side gear is received. The gearset mount is fixedly and non-rotatably coupled to the case cover. The case cover is separately coupled to the case structure.Type: GrantFiled: March 30, 2012Date of Patent: July 2, 2013Assignee: American Axle & Manufacturing, Inc.Inventors: Peter Gutsmiedl, Thomas Riedmann
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Patent number: 8460148Abstract: A differential includes a side gear comprising a helical face gear; a helical pinion configured for meshing engagement with the side gear; a pinion housing configured to house the helical pinion; and a first support member configured to support the helical pinion. The side gear rotates around a differential axis. The helical pinion has a first end and a second end opposing the first end. The pinion housing comprises a generally annular ring and includes an outer radial surface; an inner radial surface; and an aperture extending radially inwardly from the outer radial surface. The first support member is disposed radially inwardly relative to the inner radial surface of the pinion housing. In some embodiments, the differential further includes a second support member configured to support the helical pinion. The second support member is disposed radially outwardly relative to the outer radial surface of the pinion housing.Type: GrantFiled: June 11, 2010Date of Patent: June 11, 2013Assignee: Eaton CorporationInventors: Stephen P. Radzevich, Paul N. Herrmann
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Publication number: 20130045102Abstract: A mechanical transmission device to driving in rotation counter-rotating propellers of a dual-propeller turboprop, including: an epicyclic gear train having a sun gear carried on a sun gear shaft centered on a longitudinal axis and which is connected upstream to a turbine rotor of the turboprop driven in rotation; at least one planet gear meshing with the sun gear; a planet gear carrier carrying the planet gear free to rotate and which is carried by a planet carrier shaft connected downstream to a first set of propellers to drive it in rotation; and a ring gear meshing with the planet gear and which is carried on a ring gear shaft connected downstream to a second set of propellers to drive it in rotation, is disclosed.Type: ApplicationFiled: August 14, 2012Publication date: February 21, 2013Applicant: SNECMAInventors: François GALLET, Ivan Guy ROUESNE
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Patent number: 8292775Abstract: A vehicle differential apparatus includes: a differential case; two side gears; and two pinions. An axial center of each pinion is provided with a first pinion shaft insertion hole. A pinion shaft is inserted in the first pinion shaft insertion holes. An inner peripheral surface of the first pinion shaft insertion hole of each pinion is provided with two sliding surfaces that are slidable on one of two pinion inner peripheral surface-supporting portions of the pinion shaft, and a non-contacting surface that is not able to contact the pinion inner peripheral surface-supporting portion. The sliding surfaces and the non-contacting surface of each first pinion shaft insertion hole are disposed at positions adjacent to each other in the axis direction of the first pinion shaft insertion hole.Type: GrantFiled: August 3, 2009Date of Patent: October 23, 2012Assignee: JTEKT CorporationInventors: Shinichiro Nakajima, Takahiro Yoshiyama, Tsune Kobayashi
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Publication number: 20120190494Abstract: A differential, having at least one drive gear, at least two axle gears, at least one compensating gear, and at least one connector element, in which the connector element is subjected to at least one first torque from the drive gear and transmits at least one second torque to at least one of the at least two axle gears. The drive gear is constructed in such a manner that the drive gear at least partially encloses at least one interior space, and the connector element is arranged at least partially inside the interior space enclosed at least partially by the drive gear.Type: ApplicationFiled: March 2, 2012Publication date: July 26, 2012Applicant: Neumayer Tekfor Holding GmbHInventors: Eva-Maria Finkenzeller, Renald Kuempel, Kathrin Fuchs
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Patent number: 8221278Abstract: The invention relates to a spur gear differential (66) comprising a housing (68) that is embodied as a sum wheel (50) and that rotates around a longitudinal rotational axis (4), at least three planet gears (21, 22) disposed on the periphery at a distance in relation to each other around the rotational axis (4), and a drive wheel (67) at the housing (68), with the housing (68) comprised of at least two housing sections (75) fixed to each other, each of the planet gears (21, 22) mounted longitudinally on both sides in the housing sections (75), at least one of the housing sections (75) formed in the shape of a pot, with the housing section (75) formed from a pot (76) having a base (65) arranged on the front side of the housing, a wall starting from the base (65) and extending around the rotational axis (4).Type: GrantFiled: December 6, 2007Date of Patent: July 17, 2012Assignee: Schaeffler Technologies AG & Co. KGInventors: Thorsten Biermann, Ramon Jurjanz
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Patent number: 8157692Abstract: The invention relates to a differential assembly in the form of a crown gear differential, more particularly for being used in the driveline of a motor vehicle. The differential assembly comprises a differential carrier (3) which is produced in one piece, which is rotatingly drivable around an axis of rotation A and which, in a casing portion (26), comprises two radial openings for mounting sideshaft gears (15, 16) and differential gears (14). Per opening (20), there is provided a bearing disc (19) which is inserted into said opening (20) and which comprises a central bore (30) in which there is held a journal end (28) of a bearing journal (27) for a differential gear (14).Type: GrantFiled: February 17, 2006Date of Patent: April 17, 2012Assignee: GKN Driveline International GmbHInventors: Werner Krude, Ralf Leuschen, Michael Engelmann
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Patent number: 8157693Abstract: A vehicle differential assembly includes a differential housing rotatable about an axis. A first output assembly includes a first side gear positioned within the differential housing and a first output member coupled to the first side gear and having an aperture aligned with the axis. A second output assembly includes a second side gear positioned within the differential housing and a second output member coupled for rotation with the second side gear. A first helical pinion gear is meshingly engaged with the first side gear. A second helical pinion gear is meshingly engaged with the second side gear and the first helical pinion gear. A first coupling assembly includes a coupling mechanism disposed in the aperture and a biasing member engaged with the coupling mechanism to bias the first output assembly into frictional engagement with the differential housing.Type: GrantFiled: February 23, 2010Date of Patent: April 17, 2012Assignee: American Axle & Manufacturing, Inc.Inventor: Frank Waksmundzki
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Publication number: 20120077635Abstract: A differential gear assembly is disclosed. In some embodiments, the differential gear assembly includes a first sun gear and a second sun gear coaxially aligned with each other; a first set of planetary gears in mating engagement with the first sun gear; and a second set of planetary gears in mating engagement with the second sun gear. The first and second sets of planetary gears can be in mating engagement with each other. In some embodiments, the differential gear assembly also includes a first set of friction members, each of which faces a respective one of axial ends of the first set of planetary gears; and a second set of friction members, each of which faces a respective one of axial ends of the second set of planetary gears.Type: ApplicationFiled: November 21, 2011Publication date: March 29, 2012Applicant: Autotech Sport Tuning CorporationInventors: William Mark McVea, Michael Joseph Grieb, Dana C. Clark, Ronald E. Moser
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Patent number: 8133146Abstract: A gear train is provided that includes at least one side gear comprising a helical face gear and a plurality of helical pinions in meshing engagement with the helical face gear. The gear train may further include an absorber configured to provide an axial force on at least one of the plurality of helical pinions. A differential may also be provided including a differential case and a gear train disposed in the differential case. The gear train includes at least one side gear comprising a helical face gear and a plurality of helical pinions in meshing engagement with the helical face gear. The gear train in the differential may further include a means for providing an axial force on at least one of the plurality of helical pinions.Type: GrantFiled: April 14, 2009Date of Patent: March 13, 2012Assignee: Eaton CorporationInventors: Stephen P. Radzevich, Paul N. Herrmann, Steven A. Rudko
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Patent number: 8075438Abstract: An apparatus and method for transmitting a rotary input into counter-rotating outputs is disclosed herein. An exemplary apparatus for performing the method includes a planetary gear set having a sun gear rotatable by a rotary input, a plurality of planet gears in meshed engagement with the sun gear, a carrier coupling the plurality of planet gears together, and a ring gear encircling and in meshed engagement with the plurality of planet gears. The exemplary apparatus also includes a first shaft member coupled to the carrier for transmitting motion in a first rotational direction. The exemplary apparatus also includes a second shaft member coupled to the ring gear for transmitting motion in a second rotational direction opposite the first rotational direction. The first shaft member at least partially encircles the second shaft member.Type: GrantFiled: March 18, 2009Date of Patent: December 13, 2011Assignee: Rolls-Royce CorporationInventors: Daniel K. Vetters, Robert W. Cedoz
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Patent number: 8057348Abstract: The differential for vehicles comprises a rotatable carcass (1) inside which are housed a pair of planetary gears (2) rotatably integral with the axle shafts of two of the wheels of the vehicle, and at least a pair of satellite gears (5) linked to each other and movable to each other, each of said satellite gears (5) being rotatably integral with one of said planetary gears (2), and it is characterized in that said satellite gears (5) are linked to each other by threaded cylinders (3) with inverted threads with the same pitch and diameter. It permits always the differentiation of rotation between the wheels.Type: GrantFiled: September 5, 2006Date of Patent: November 15, 2011Inventor: Jose Gimenez Vidal
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Publication number: 20110245012Abstract: A spur gear differential (1) having a first sun (3) and a second sun (5), wherein the first sun (3) is associated with a first set of planetary gears (7) and the second sun (5) is associated with a second set of planetary gears (9), and the first set of planetary gears (7) engages with the second set of planetary gears (9). The number of teeth (11) of the first sun (3) are equal to the number of teeth (12) of the second sun (5), and the teeth (11) of the first sun (3) are disposed by a profile shift on a crown circle (2) having a crown circle diameter (DK1) that differs from the crown circle diameter (DK2) of a crown circle on which the teeth (12) of the second sun (5) are disposed. The first set of planetary gears (7) engages only with the first sun (3) and the second set of planetary gears (9) engages only with the second sun (5).Type: ApplicationFiled: June 24, 2010Publication date: October 6, 2011Applicant: SCHAEFFLER TECHNOLOGIES GMBH & CO. KGInventors: Thorsten Biermann, Bernd-Robert Hohn, Franz Kurth
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Publication number: 20100267507Abstract: The invention relates to a groundspeed power take-off (PTO) shaft arrangement in a commercial agricultural vehicle. The groundspeed PTO shaft arrangement has a groundspeed PTO shaft device with a differential gear (222). The differential gear contains an input shaft (221) which is coupled to a gear (212). A right wheel output shaft (232) is coupled to an end drive (233) of a right wheel (234) and driven via the input shaft (221); a left wheel output shaft (239) is coupled to an end drive of a left wheel and is driven via the input shaft (221). Provided in this case is a first PTO shaft (236) which issues from the differential gear (222) relative to the input shaft (221), is driven by the input shaft (221) and is coupled to the right or left wheel output shaft (232, 239).Type: ApplicationFiled: October 24, 2008Publication date: October 21, 2010Applicant: AGCO GMBHInventor: Robert Honzek
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Publication number: 20100204000Abstract: A power-branched transmission for an agricultural vehicle is configured as a power-branched transmission having a secondary coupling. The transmission comprises a summation planetary gear set (5), the planetary gear of which are configured as a double planetary gear (8).Type: ApplicationFiled: August 15, 2008Publication date: August 12, 2010Applicant: ZF FRIEDRICHSHAFEN AGInventors: Gerhard Bailly, Thomas Ratzmann, Walter Fischer, Jurgen Pohlenz
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Patent number: 7758466Abstract: A vehicle planetary gear device includes a ring gear, a sun gear, and a carrier, and pinions housed in the carrier. A penetration hole formed in a hollow cylindrical portion of the carrier has two inner wall surfaces that face an outer peripheral surface of a pinion. One of the inner wall surfaces has a curvature radius larger than the radius of the pinion, and has a curvature center that is apart from the radius center of the pinion gear. The pinion is disposed with respect to the carrier with a predetermined space formed between the one of the inner wall surfaces and the outer peripheral surface of the pinion, and thereby slides along a radial direction of the carrier.Type: GrantFiled: March 5, 2008Date of Patent: July 20, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventors: Koichi Kato, Akinori Homan, Hideki Tamoto
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Publication number: 20100179014Abstract: The invention relates to a torque-splitting differential (1) for a motor vehicle, comprising two coaxially aligned lateral differential gears (10, 10?) that are spaced apart in the axial direction, each lateral differential gear (10, 10?) being mounted to be rotatable about a common axis of rotation D. The differential has at least two compensating gears (20), each of which meshes with both lateral differential gears (10, 10?). A compensating gear support (30), on which the compensating gears (20) are rotatably mounted and which is arranged between the lateral differential gears (10, 10?), is mounted to be rotatable about the axis of rotation D. The lateral differential gears (10, 10?) are designed as crown gears, of which the teeth have different diameters. Furthermore, the compensating gears (20) are spur-cut gears while the compensating gear support (30) rotatably rests against the lateral differential gears (10, 10?).Type: ApplicationFiled: January 30, 2008Publication date: July 15, 2010Applicant: TEDRIVE HOLDING B.V.Inventors: ANDREAS HOHLE, ACHIM BOOS, CHRISTOPH CHATENAY, JOSEF FUHS, KAI-UWE USTORF, MICHAEL NAGEL, ULRICH KUKERTZ
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Patent number: 7669330Abstract: A method for structuring a gear assembly housing may include: identifying the lowest surface structure of ring gear teeth top lands; forming a lower gear housing portion having a wall positioned below a gear assembly centerline; shaping the wall relative to an axis of an axle to form: a convex curved wall segment adjacent the lowest surface structure joined to a first concave curved wall segment that is joined to a generally linear wall segment; a first transition wall segment that is joined to the generally linear wall segment; a ring gear wall segment of generally linear form joined to the convex curved wall segment; the ring gear wall segment joined to a second concave curved wall segment that transitions to a second transition wall segment; and attaching an upper housing portion.Type: GrantFiled: July 8, 2005Date of Patent: March 2, 2010Inventor: Jim McGean