Fluid Pump And Motor In One Of Plural Paths To Or From Planetary Gearing Patents (Class 475/72)
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Publication number: 20100210389Abstract: A hydrostatic-mechanical power split transmission with at least two continuous operating ranges for use in agricultural and construction machines. The transmission has a summation planetary gear and a clutch for forward drive (7) and a clutch for reverse drive (6) that are arranged upstream of the summation gear. The transmission has a first sun gear (13) and a second sun gear (14) and a ring gear such that the ring gear (15) can be connected to an output drive shaft (22), via a clutch for the first driving range (23), and the second sun gear (14) can be connected to the output drive gear (22), via a clutch for the second operating range (27).Type: ApplicationFiled: August 15, 2008Publication date: August 19, 2010Applicant: ZF FRIEDRICHSHAFEN AGInventors: Jurgen Legner, Roland Fischer, Michael Siber
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Publication number: 20100197438Abstract: A power split transmission for a working machine, such as a wheel loader, for example, has a hydrostatic and a mechanical power branch which are summed with one another via a summation gear (12). A reversing gear (7) is connected downstream of the summation gear (12) and a gear shifting mechanism (20) is connected downstream of the summation gear (12).Type: ApplicationFiled: August 15, 2008Publication date: August 5, 2010Applicant: ZF FRIEDRICHSHAFEN AGInventor: Jurgen Legner
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Patent number: 7744499Abstract: A hydro-mechanical transmission system. The system includes an engine having a drive shaft that extends into and supplies power to a gear box having a first and second planetary gear set, wherein the first and second planetary gear set includes a sun with a first ring gear fixed and a carrier coupled to the drive shaft through a double clutch, a hydraulic pump driven by the engine and hydraulically coupled to a hydraulic motor, a low pressure accumulator coupled to the motor and the pump, a high pressure accumulator coupled to the motor and the pump, wherein the hydraulic motor couples to the suns of both planetary gear sets, wherein the engine drives the carrier of the second planetary gear set with the ring of the second planetary gear set coupled to the drive shaft through a double clutch.Type: GrantFiled: January 22, 2007Date of Patent: June 29, 2010Assignee: Southwest Research InstituteInventor: Gary Lee Stecklein
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Publication number: 20090250886Abstract: A hybrid transmission is provided, including a transmission housing with an input cover attached to a main housing portion, and a hydraulic fluid reservoir in fluid communication with and attached to the transmission housing. The transmission also includes an input shaft in driving communication with an engine. A pump cover is attached to the input housing to define a pump pocket therebetween. A torque transmitting assembly is secured to the pump cover. The torque transmitting assembly includes a piston housing member that is coaxial with and longitudinally spaced from the pump cover to define an inlet passage therebetween. The inlet passage is configured to communicate the hydraulic fluid reservoir with the transmission housing, and is oriented at least partially radially adjacent to the pump pocket. A gasket member is disposed between the pump cover and piston housing member, and configured for fluidly sealing the same.Type: ApplicationFiled: August 5, 2008Publication date: October 8, 2009Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventor: Eric S. Tryon
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Publication number: 20090247343Abstract: A transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque-transmitting devices. Further, a hydraulic fluid control circuit is provided for controlling the operation of the plurality of torque-transmitting devices. The hydraulic fluid control circuit receives pressurized hydraulic fluid from an off-axis hydraulic fluid pump and has a plurality of fluid passages disposed in the transmission house, input shaft, output shaft and other coupling members.Type: ApplicationFiled: January 28, 2009Publication date: October 1, 2009Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: James M. Hart, Scott H. Wittkopp, Clinton E. Carey, Andrew W. Phillips, James B. Borgerson, Steven P. Moorman, Elizabeth I. Wooden, Edwin T. Grochowski
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Patent number: 7588509Abstract: Two parallel planetary gear sets with a common sun gear output are geared to a hydraulic pump and motor system. Input is applied to both planetary gear sets in parallel. Output is from both planetary gear sets in parallel. Two planetary gear set members, one in each set, are geared to the pump and motor and are used to control the ratio of the infinitely variable gear transmission (IVGT). The displacement ratio of the pump and motor, connected to these two members, controls the ratio of the IVGT.Type: GrantFiled: March 12, 2007Date of Patent: September 15, 2009Inventor: John David Marsha
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Patent number: 7559865Abstract: A working vehicle comprises: a power source having an output shaft; axles; a cargo deck; and a transmission apparatus for driving axles disposed below the cargo deck. The transmission apparatus includes an input shaft drivingly connected to the output shaft of the power source, a hydro-mechanical stepless transmission driven by the input shaft, and a differential gear assembly differentially connecting the axles to each other. The hydro-mechanical stepless transmission includes a planetary gear assembly and a hydrostatic stepless transmission drivingly connected to the planetary gear assembly. The differential gear assembly is drivingly connected to the hydro-mechanical stepless transmission.Type: GrantFiled: November 14, 2007Date of Patent: July 14, 2009Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.Inventors: Norihiro Ishii, Hiroaki Shimizu, Akihiro Ima, Atsuo Yoshina
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Publication number: 20090088280Abstract: A variable displacement gear pump device that provides variable flow while retaining the advantages generally associated with gear pumps, and without diverting pressurized fluid back to the pump inlet. In one embodiment, a gear pump includes a first gear and a second gear forming an external pump, the first gear rotatable about a fixed axis and drivingly engaging the second gear, the second gear rotating about its central axis and selectively movable in an epicyclical relationship with the first gear whereby the discharge of the pump is varied.Type: ApplicationFiled: September 29, 2008Publication date: April 2, 2009Inventor: Kendall Alden Warren
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Publication number: 20090036248Abstract: The invention concerns a drive with a torque split transmission (1). The torque split transmission (1) includes a hydraulic pump (9) and a hydraulic motor (12), which are connected to each other via a first work line (10) and a second work line (11). The drive also has at least one first storage element (21) to store braking energy, it being possible to connect the at least one first storage element (21) to the first work line (10) or second work line (11). The hydraulic pump (9) and the hydraulic motor (12) are connected mechanically to a driven shaft (18).Type: ApplicationFiled: March 13, 2007Publication date: February 5, 2009Applicant: Bosch Rexroth AGInventors: Matthias Mueller, Steffen Mutschler
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Patent number: 7465245Abstract: The transmission comprises: an input shaft coupled to a prime mover of the tractor; an output shaft; a hydrostatic unit including a pump driven by the prime mover shaft and a motor driven by the pump; an epicyclic torque splitter unit, including a first and a second input shaft and a first and a second output shaft, the rotational speeds of the first and second output shafts varying, respectively, in a first and a second range adjacent to each other as the rotational speed of the first input shaft varies between a maximum value and a minimum value; a clutch unit, arranged to couple the output shaft of the transmission selectively to the first or second output shaft of the torque splitter unit to provide a pair of forward operating ranges, at high and low speed respectively; and a reversing unit, arranged to provide a reverse operating range.Type: GrantFiled: August 13, 2004Date of Patent: December 16, 2008Assignee: Same Deutz-Fahr Group S.p.A.Inventors: Angelo Ripamonti, Giovanni Rivoltella
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Patent number: 7428456Abstract: A system and method for actively decelerating a combine rotor is provided. The system includes an electronic control system configured to disengage the combine rotor from an engine, to brake the combine rotor at a first deceleration rate for a first time interval, and to subsequently brake the combine rotor at another deceleration rate until the rotor is stopped.Type: GrantFiled: June 26, 2006Date of Patent: September 23, 2008Assignee: CNH America LLCInventors: John G. Brome, Douglas L. Wolken, Nicholas J. Laufenberg
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Patent number: 7416502Abstract: A hydrostatic mechanical power-split transmission with a continuously variable gear ratio comprises a hydrostatic transmission part (1) consisting of a first hydrostatic unit (13) with an adjustable volume, a second hydrostatic unit (A) with a constant volume, and a mechanical transmission part (2) comprising a summing transmission and a range transmission, the summing transmission and the range transmission are arranged in an axially staggered manner in relation to the hydrostatic units.Type: GrantFiled: December 14, 2004Date of Patent: August 26, 2008Assignee: ZF Friedrichshafen AGInventor: Peter Ulbrich
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Publication number: 20080176699Abstract: A hydro-mechanical transmission system. The system includes an engine having a drive shaft that extends into and supplies power to a gear box having a first and second planetary gear set, wherein the first and second planetary gear set includes a sun with a first ring gear fixed and a carrier coupled to the drive shaft through a double clutch, a hydraulic pump driven by the engine and hydraulically coupled to a hydraulic motor, a low pressure accumulator coupled to the motor and the pump, a high pressure accumulator coupled to the motor and the pump, wherein the hydraulic motor couples to the suns of both planetary gear sets, wherein the engine drives the carrier of the second planetary gear set with the ring of the second planetary gear set coupled to the drive shaft through a double clutch.Type: ApplicationFiled: January 22, 2007Publication date: July 24, 2008Inventor: Gary Lee Stecklein
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Publication number: 20080149408Abstract: A hydraulic arrangement for the activation of two actuators, with a hydraulic pressure supply unit which is assigned jointly to the two actuators. The pressure supply unit is designed to be reversible in its direction of action, so that, depending on the direction of action, in each case only one of the actuators is driven.Type: ApplicationFiled: December 17, 2007Publication date: June 26, 2008Inventors: Hans-Peter Nett, Harwin Niessen, Jan Potulski
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Publication number: 20080153648Abstract: A gearing unit of a power transferring system includes an input shaft, a hydraulic pump, a hydraulic motor, a worm rod and a worm wheel which is cooperated with a pair of planet gears. An output shaft is connected with the worm wheel to transfer torque so as to improve the initial speed, upward slope driving, gear shifting and braking of vehicles.Type: ApplicationFiled: December 26, 2006Publication date: June 26, 2008Inventor: Po-Lu Chen
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Patent number: 7381144Abstract: A gearbox assembly, in particular for a wheel drive of a vehicle with a hydrostatic gearbox having, according to a first driving mode, the sun gear of the single planetary stage in effective interaction with a ring gear of the planetary stage via a first coupling, so that the output speed of the planetary stage is a linear function of the output speed of the hydrostatic gearbox and that, according to a second driving mode, the ring gear is in effective interaction with the hydrostatic gearbox, wherein, at the same time, the sun gear is in effective interaction with a gearbox input shaft via a second coupling so that as a consequence of power distribution, the speeds of the ring gear and the sun gear overlap.Type: GrantFiled: October 28, 2005Date of Patent: June 3, 2008Assignee: Lohmann & Stolterfoht GmbHInventors: Andreas Meise, Bernhard Langenbeck, Steffan Reiblein, Frank Nagel
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Publication number: 20080119317Abstract: A working vehicle comprises: a power source having an output shaft; axles; a cargo deck; and a transmission apparatus for driving axles disposed below the cargo deck. The transmission apparatus includes an input shaft drivingly connected to the output shaft of the power source, a hydro-mechanical stepless transmission driven by the input shaft, and a differential gear assembly differentially connecting the axles to each other. The hydro-mechanical stepless transmission includes a planetary gear assembly and a hydrostatic stepless transmission drivingly connected to the planetary gear assembly. The differential gear assembly is drivingly connected to the hydro-mechanical stepless transmission.Type: ApplicationFiled: November 14, 2007Publication date: May 22, 2008Inventors: Norihiro Ishii, Hiroaki Shimizu, Akihiro Ima, Atsuo Yoshina
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Publication number: 20080108469Abstract: A pump drive for a vehicle transmission pump. A transmission input torque member is operable to carry prime mover torque. A source of pump torque includes a pump input torque member circumscribing the transmission input torque member to apply torque to the transmission pump. An overrunning clutch is interposed between the pump input torque member and the transmission input torque member to carry the prime mover torque from the transmission input torque member to the pump torque output member.Type: ApplicationFiled: November 2, 2006Publication date: May 8, 2008Inventors: Lars Weinschenker, Zhenxing Fu, Robert Inderka
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Publication number: 20080103006Abstract: A hydromechanical transmission that has first and second planetaries each having first, second and third elements. The first element of the first planetary is connected to a first hydrostatic unit while the second element of the first planetary is connected to a second hydrostatic unit with the third element of the first planetary connected to an input. A primary clutch is connected between first and third elements of the second planetary while at least one secondary clutch is connected to the second planetary. When the primary and secondary clutches are selectively engaged at least two operating modes having continuous ratios are provided.Type: ApplicationFiled: April 20, 2007Publication date: May 1, 2008Applicant: SAUER-DANFOSS INC.Inventors: Frederic W. Pollman, Wilhelm Gollner
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Patent number: 7357745Abstract: A travel working machine includes a traveling body 2 supported by traveling contrivances such as wheels 3, 4 and provided with an engine 5, a transmission case 8 mounted to the traveling body, and a hydraulic mechanical transmission mounted to the transmission case for changing speed of power from the engine by a combination of a planetary gearing 30 and a hydraulic transmission which includes a hydraulic pump 27 and a hydraulic motor 28 and transmitting the power to the traveling contrivances. A pump input shaft 34 for input to the hydraulic pump, a motor output shaft 35 for output from the motor and transmission gears 43, 45 provided at the respective shafts are arranged in the transmission case and above an oil level S of lubricating oil stored in a lower portion of the transmission case. Such an arrangement contributes to reducing power loss.Type: GrantFiled: September 9, 2004Date of Patent: April 15, 2008Assignee: Yanmar Co., Ltd.Inventors: Shigemi Hidaka, Youichirou Nishi, Takeshi Kishimoto
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Patent number: 7354369Abstract: In a working vehicle, a variable output HST and a planetary gear unit are connected with an engine, which is supported on a vehicle frame closer to a first side of a fore and aft direction of the vehicle in vibration free manner so as to together constitute a driving-side unit, which is integrally supported on the vehicle frame in vibration free manner. A transmission case of a transmission is fixedly supported on the vehicle frame closer to a second side of the fore and aft direction of the vehicle with a distance from the driving-side unit. An output element of the planetary gear unit is operatively connected with a wheel drive train of the transmission via a shaft coupling extending along the fore and aft direction of the vehicle.Type: GrantFiled: June 27, 2007Date of Patent: April 8, 2008Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.Inventors: Toshiyuki Hasegawa, Atsuo Yoshina, Shigenori Sakikawa
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Patent number: 7354368Abstract: A method for achieving high quality shifts with one hydraulic unit near zero displacement when using dog clutches. This method includes selecting the proper displacement and vocation (whether the hydrostatic unit works as a pump or motor) of a low displacement hydraulic unit during the shift, selecting the appropriate speed differential between the clutch elements, selecting the proper vehicle speed at which to make the shift, and sequencing the displacement changes of the hydraulic units with a controller in order to achieve the desired shift conditions.Type: GrantFiled: January 31, 2005Date of Patent: April 8, 2008Assignee: Sauer-Danfoss Inc.Inventor: Frederic W Pollman
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Publication number: 20080058146Abstract: In certain embodiments, a pump system includes a variable output transmission having a rotatable motor coupling, a rotatable pump coupling, a planetary gear assembly disposed between the rotatable motor coupling and the rotatable pump coupling, and a clutch disposed between the rotatable motor coupling and the rotatable pump coupling. The pump system also includes a controller configured to control the clutch in response to fluid pumping feedback.Type: ApplicationFiled: August 31, 2006Publication date: March 6, 2008Inventors: William P. Pizzichil, Chuong Huy Nguyen, William C. Livoti
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Patent number: 7335125Abstract: The present invention has a dual sun planetary gearset, as well as a dog clutch or other type of shifting device, which allows for the hydrostatic unit to operate in a reverse direction in similar fashion to how it operates in a forward direction, thereby increasing efficiency and torque in the reverse direction. The gearset of the present invention has a first sun gear having one or more planetary gears that are mounted on a carrier, and a second sun gear, also having one or more planetary gears that are mounted on the same common carrier as the first set of planetary gears.Type: GrantFiled: August 15, 2005Date of Patent: February 26, 2008Assignee: BorgWarner Inc.Inventor: Paul T. McCrary
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Publication number: 20070281815Abstract: The invention relates to a hydrostatic mechanical traction gearbox having a continuously variable hydrostatic drive in which the hydrostatic drive has a hydrostatic pump driven by an internal combustion engine and a hydraulic motor driven by the pump, the pump and the hydraulic motor are positively coupled in an adjustable fashion by means of a single common pivoting part in such a way that the pump can be pivoted between a minimum angle and a maximum angle while at the same time the motor pivots synchronously from a maximum pivot angle to a minimum angle. The pump is configured for a single delivery direction of the volume flow. A mechanical range change gearbox is connected downstream, said gearbox having a plurality of gear shifting stages which can be shifted by means of a clutch.Type: ApplicationFiled: March 6, 2007Publication date: December 6, 2007Applicant: Sauer-Danfoss Inc.Inventor: Wilhelm Gollner
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Patent number: 7303498Abstract: A working vehicle comprises: a power source having an output shaft; axles; a cargo deck; and a transmission apparatus for driving axles disposed below the cargo deck. The transmission apparatus includes an input shaft drivingly connected to the output shaft of the power source, a hydro-mechanical stepless transmission driven by the input shaft, and a differential gear assembly differentially connecting the axles to each other. The hydro-mechanical stepless transmission includes a planetary gear assembly and a hydrostatic stepless transmission drivingly connected to the planetary gear assembly. The differential gear assembly is drivingly connected to the hydro-mechanical stepless transmission.Type: GrantFiled: March 4, 2005Date of Patent: December 4, 2007Inventors: Norihiro Ishii, Hiroaki Shimizu, Akihiro Ima, Atsuo Yoshina
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Patent number: 7241242Abstract: A two-mode compound-split hydro-mechanical powertrain employs a hydro-mechanical continuously variable transmission having two hydraulic units, at least two torque-transmitting mechanisms, and a planetary gear arrangement for combining the output of an engine and the two hydraulic units into a single output mechanism.Type: GrantFiled: October 28, 2004Date of Patent: July 10, 2007Assignee: General Motors CorporationInventor: Michael R. Schmidt
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Patent number: 7207916Abstract: A PTO transmission transmits power from an engine-driven shaft to a PTO shaft. The transmission includes a variable displacement hydraulic pump driven by the engine-driven shaft. A planetary transmission unit includes a ring gear driven by the engine-driven shaft, a planet carrier drivingly coupled to the PTO shaft, planet gears rotatably mounted on the planet carrier and in meshing engagement with the ring gear, and a sun gear in meshing engagement with the planet gears and drivingly connected to a fixed displacement variable speed hydraulic motor hydraulically driven by the pump. A one-way clutch is coupled to the sun gear. The one-way clutch allows the sun gear to rotate in only one direction so that at rated engine speed all power is transmitted mechanically.Type: GrantFiled: January 5, 2005Date of Patent: April 24, 2007Assignee: Deere & CompanyInventors: Reno Antonio Rodeghiero, Werner Stettler, Barbara Klabunde, James Albert Niebergall
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Patent number: 7186201Abstract: A system and method for actively decelerating a combine rotor is provided. The system includes an electronic control system configured to disengage the combine rotor from an engine, to brake the combine rotor at a first deceleration rate for a first time interval, and to subsequently brake the combine rotor at another deceleration rate until the rotor is stopped.Type: GrantFiled: February 4, 2005Date of Patent: March 6, 2007Assignee: CNH America LLCInventors: John G. Brome, Douglas L. Wolken, Nicholas J. Laufenberg
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Patent number: 7168997Abstract: A boat propulsion system interposed between a prime mover and a propeller shaft comprises a hydro-mechanical transmission including a hydrostatic transmission part and a gear transmission part. The hydrostatic transmission part includes a variable displacement hydraulic pump having a movable swash plate and a hydraulic motor fluidly connected to the hydraulic pump. The hydraulic pump is driven by the output rotary force of the prime mover. The gear transmission part is drivingly interposed between the hydrostatic transmission part and the propeller shaft so that the gear transmission part is driven by the input rotary force of the hydraulic pump with the assistance of the output rotary force of the hydraulic motor. A hydraulic clutch system may be interposed between the gear transmission part of the hydro-mechanical transmission and the propeller shaft so as to select one of opposite output rotary directions of the propeller shaft.Type: GrantFiled: October 25, 2005Date of Patent: January 30, 2007Inventor: Kazuhiko Ohtsuki
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Patent number: 7074149Abstract: A transmission for a wheel type working vehicle which makes it possible to reduce a size of a transmission mechanism for transmitting a mechanical driving force and a hydraulic driving force from the transmission to a front and rear wheel driving output shaft that is along a vehicle longitudinal direction. For this purpose, a bevel gear (49) and a cylindrical gear (50) are included at a front and rear wheel driving output shaft (20) for transmitting the mechanical driving force and the hydraulic driving force to front and rear wheels, and the front and rear wheel driving output shaft (20) is connected to an output shaft (21) of a mechanical transmission mechanism (15) via a bevel gear transmission mechanism (22), and is also connected to a hydraulic power transmission mechanism (24) connected to a hydraulic motor (17) via a cylindrical gear transmission mechanism (25).Type: GrantFiled: December 29, 2003Date of Patent: July 11, 2006Assignee: Komatsu Ltd.Inventor: Tetsuya Morimoto
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Patent number: 7062368Abstract: An agricultural combine includes a rotor drive system to which sensors are coupled to signal the rotational speed of a hydraulic motor and an engine. An electronic controller that contains a mathematical model of the system reads the sensors and using the model estimates additional parameters of the system. The estimated parameters include a gearbox's gear ratio and a planetary ring gear's speed. These estimated parameters and the sensor readings are used in a PID feedback control loop to control the speed of a planetary ring gear by controlling the speed of a hydraulic motor driving the sun gear. In this manner, the controller can drive the ring gear to a predetermined speed that reduces the difference in the input and output speeds of a hydraulic clutch and thereby engage that clutch while reducing shock to the clutch and other mechanical components of the combine.Type: GrantFiled: June 11, 2002Date of Patent: June 13, 2006Assignee: CNH America LLCInventors: Yun-Ren Ho, John E. Bundy, John G. Brome
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Patent number: 6997838Abstract: An axial piston pump and an axial piston motor, mounted in a housing each have a rotating element and a non-rotating element. Each non-rotating element is mounted for tilting movement about axes transverse to the axes of rotation of the rotating element, on trunnions in its own respective pair of mounting journals in the housing for controlling the transmission ratio. The pump and the motor are disposed side-by-side in the housing with the axes of rotation approximately parallel to each other. A stationary manifold, fixed to the housing, has surfaces in contact with the rotating pump element and the rotating motor element. Fluid passages open in the surfaces in fluid communication with the pump and motor cylinders through a pump/manifold interface. Internal fluid passages in the stationary manifold convey fluid pressurized in the pump directly to the motor, and convey spent fluid displaced from the motor back to the pump.Type: GrantFiled: March 11, 2003Date of Patent: February 14, 2006Assignee: Folsom Technologies, Inc.Inventors: Lawrence R. Folsom, Clive Tucker
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Patent number: 6988917Abstract: A boat propulsion system interposed between a prime mover and a propeller shaft comprises a hydro-mechanical transmission including a hydrostatic transmission part and a gear transmission part. The hydrostatic transmission part includes a variable displacement hydraulic pump having a movable swash plate and a hydraulic motor fluidly connected to the hydraulic pump. The hydraulic pump is driven by the output rotary force of the prime mover. The gear transmission part is drivingly interposed between the hydrostatic transmission part and the propeller shaft so that the gear transmission part is driven by the input rotary force of the hydraulic pump with the assistance of the output rotary force of the hydraulic motor. A hydraulic clutch system may be interposed between the gear transmission part of the hydro-mechanical transmission and the propeller shaft so as to select one of opposite output rotary directions of the propeller shaft.Type: GrantFiled: September 21, 2004Date of Patent: January 24, 2006Inventor: Kazuhiko Ohtsuki
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Patent number: 6984172Abstract: A dual power path drive and method for controllably decelerating the rotor or rotors of an agricultural combine in reduced time, without causing undesirable wear, shock and energy transfer to other aspects of the power system of the combine. The drive and method use a planetary gear arrangement having an output connected to the rotor or rotors, an input connected to an output of a first power source or path which can be a fluid power source such as a fluid motor of a hydro-static drive or a variable speed electrical motor, the first power source or path being controllable within speed limits thereof for decelerating the rotor from several operating states.Type: GrantFiled: January 14, 2004Date of Patent: January 10, 2006Assignee: CNH America LLCInventors: Aziz Talbi, Yun-Ren Ho, John G. Brome
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Patent number: 6939261Abstract: A small engine transmission having a hydromechanical transmission unit providing a first power path, and a mechanical power transmission unit providing a second power path. The mechanical power transmission is a planetary gear system having a planetary carrier. The hydromechanical transmission is associated with the mechanical transmission to decrease average hydraulic power flow of the engine transmission to thereby increase operating efficiency and to permit the reduction of an output speed range to reduce transmitted power for the use of multiple modes to achieve a full torque and speed range of the transmission.Type: GrantFiled: April 22, 2004Date of Patent: September 6, 2005Assignee: Sauer-Danfoss, Inc.Inventor: Frederic W. Pollman
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Patent number: 6918850Abstract: In a working vehicle, a variable output HST and a planetary gear unit are connected with an engine, which is supported on a vehicle frame closer to a first side of a fore and aft direction of the vehicle in vibration free manner so as to together constitute a driving-side unit, which is integrally supported on the vehicle frame in vibration free manner. A transmission case of a transmission is fixedly supported on the vehicle frame closer to a second side of the fore and aft direction of the vehicle with a distance from the driving-side unit. An output element of the planetary gear unit is operatively connected with a wheel drive train of the transmission via a shaft coupling extending along the fore and aft direction of the vehicle.Type: GrantFiled: January 13, 2003Date of Patent: July 19, 2005Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.Inventors: Toshiyuki Hasegawa, Atsuo Yoshina, Shigenori Sakikawa
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Patent number: 6880429Abstract: A transmission assembly includes a housing, an input shaft driveably engaged with a drive source and being rotatably supported in the housing, and an output shaft rotatably supported in the housing. A hydrostatic transmission component is disposed within the housing and is drivingly engaged with the input shaft. A mechanical transmission component is disposed within the housing and is drivingly engaged with the input shaft. The hydrostatic transmission component and the mechanical transmission component are drivingly engaged with the output shaft. The hydrostatic transmission component is moveably mounted within the housing and is axially moveable relative to the input shaft.Type: GrantFiled: April 25, 2003Date of Patent: April 19, 2005Inventors: Steven A. Daniel, Michael G. Cronin
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Publication number: 20040242357Abstract: A hydromechanical transmission having a continuously variable transmission function and occupying a small area for installation is provided. For this purpose, the transmission includes a driving source (3), a planetary gear speed reducer (5) connected to the driving source, a variable displacement hydraulic pump (11), which is connected to the planetary gear speed reducer, and to which one part of an output force of the driving source is outputted, an output shaft (717), which is connected to the planetary gear speed reducer, and to which the other part of the output force of the driving source is outputted, a first and a second variable displacement hydraulic motors (31, 37) receiving pressure oil from the hydraulic pump and outputting a driving force to the output shaft, and a clutch (45) placed between the second hydraulic motor (37) and the output shaft.Type: ApplicationFiled: April 29, 2004Publication date: December 2, 2004Applicant: KOMATSU LTD.Inventor: Naoki Ishizaki
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Patent number: 6821226Abstract: The method serves for the shift sequence control of a continuous automatic transmission, especially of a motor vehicle, having gear-stage switchover. The transmission ratio of the automatic transmission is adjustable within a set gear stage by means of an adjusting unit. Here, it is provided that a coordinated, data-dependent control of the gear stage switchover and the continuous transmission ratio adjustment takes place with the aid of a common shift sequence control system.Type: GrantFiled: October 16, 2002Date of Patent: November 23, 2004Assignee: Robert Bosch GmbHInventors: Ralf Lehmann, Uwe Maienberg, Marko Poliansek
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Publication number: 20040142784Abstract: A transmission for a wheel type working vehicle which makes it possible to reduce a size of a transmission mechanism for transmitting a mechanical driving force and a hydraulic driving force from the transmission to a front and rear wheel driving output shaft that is along a vehicle longitudinal direction. For this purpose, a bevel gear (49) and a cylindrical gear (50) are included at a front and rear wheel driving output shaft (20) for transmitting the mechanical driving force and the hydraulic driving force to front and rear wheels, and the front and rear wheel driving output shaft (20) is connected to an output shaft (21) of a mechanical transmission mechanism (15) via a bevel gear transmission mechanism (22), and is also connected to a hydraulic power transmission mechanism (24) connected to a hydraulic motor (17) via a cylindrical gear transmission mechanism (25).Type: ApplicationFiled: December 29, 2003Publication date: July 22, 2004Applicant: KOMATSU LTD.Inventor: Tetsuya Morimoto
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Publication number: 20040058770Abstract: Sun-and-planetary gearing for differentially drivingly connecting the front wheels to the rear wheels is arranged coaxially to a motor shaft of a hydrostatic transmission so as to provide a compact transmission apparatus having the hydrostatic transmission for a working vehicle. The sun-and-planetary gearing includes a first element drivingly connected to the motor shaft rotating integrally with the motor shaft; a second element drivingly connected to front wheels of the working vehicle; and a third element drivingly connected to rear wheels of the working vehicle and differentially connected to the second element through the first element. A differential locking mechanism for locking the second and third elements with each other may be disposed in the transmission apparatus. At least one of the second and third elements may include a shaft drivingly connected to either front or near wheels so that the differential locking mechanism may be disposed on the shaft.Type: ApplicationFiled: July 28, 2003Publication date: March 25, 2004Inventor: Norihiro Ishii
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Patent number: 6692395Abstract: A PTO transmission includes a split power transmission unit having an output member connected to a PTO shaft, a first input connected to an engine output shaft and a second input connected the output of a variable speed drive unit. A control unit controls the speed of the variable speed drive unit as a function of sensed engine speed and maintains the PTO shaft at a constant speed. The split power transmission is preferably a planetary gear unit. The variable speed drive unit preferably includes a variable displacement hydrostatic pump driving a fixed displacement hydrostatic motor which drives a sun gear of the planetary gear unit. This system transmits power to the PTO shaft from both the engine and from the variable speed drive unit. The control unit may also control the variable speed drive unit so that the speed of the PTO shaft is maintained at a desired ratio with respect to the ground speed, or so that the speed of the PTO shaft is maintained at a speed set by an operator.Type: GrantFiled: February 25, 2002Date of Patent: February 17, 2004Assignee: Deere & CompanyInventors: Reno Antonio Rodeghiero, Werner Stettler, Graham Thompson, Barbara Klabunde, Andrey Valeryevich Skotnikov
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Patent number: 6663525Abstract: The transmission includes a planetary gear arrangement having a rotatable output, a first rotatable input connected to an output of a fluid motor, and a second rotatable input connected to a clutch or other device engageable or operable for connecting the second input to a rotatable mechanical power source. The transmission includes a fluid operated brake or other device engageable or operable when fluid therein is pressurized for connecting the second input of the gear arrangement to a fixed member for preventing rotation of the second input. When the transmission is placed or moved into a neutral operating state or condition, the fluid brake or other device is automatically engaged or operated to prevent rotation of the second input, and flow of pressurized fluid through the fluid motor is automatically prevented, such that driving rotation of the output of the transmission is prevented. Then, when the fluid brake or other device is depressurized, the transmission output can be manually rotated.Type: GrantFiled: July 17, 2002Date of Patent: December 16, 2003Assignee: Case CorporationInventors: Kevin D. McKee, Jimmie Clifford, Patrick Dinnon
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Patent number: 6651529Abstract: A hydrostatic transmission mountable to a vehicle frame. The hydrostatic transmission is adapted to removeably receive an axle shaft. The hydrostatic transmission is also adapted to be mounted to at least one of two opposed side members of the vehicle frame. The opposed side members have openings though which the axle shaft passes. The vehicle may be a snow thrower.Type: GrantFiled: July 2, 2002Date of Patent: November 25, 2003Assignee: Hydro-Gear Limited PartnershipInventors: Herb M. Poplawsli, Thomas D. Wiley, John D. Schreier, Michael L. Bennett, Lonnie E. Holder, Ralph A. McClelland
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Patent number: 6645106Abstract: A transmission for performing a reliable continuously-variable-speed operation by using gear meshing with a minimized power loss, and a vehicle-use continuously-variable transmission device that uses it to provide a continuously-variable-speed change ratio optimal for an engine output; specifically, a dual continuously-variable transmission device for effecting a secondary speed change of increasing or decreasing an output-speed increasing ratio when the rotating speed of a turbine shaft is increased or decreased with the rotation speed of a sub-drive speed-change sun gear fixed.Type: GrantFiled: April 22, 2002Date of Patent: November 11, 2003Inventor: Teak-Seo Goo
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Publication number: 20030199354Abstract: An axle assembly for use in lawn tractors, pedestrian walk-behind mowers and snow blowers in the form of a housing having an internally disposed hydrostatic transmission and speed reducing gearing. An input shaft supported in the housing for driving a variable-displacement hydraulic pump of the hydrostatic transmission, the pump fluidly coupled to a fixed-displacement hydraulic motor of the hydrostatic transmission, and where the motor is drivingly connected through the speed reducing gearing to an output axle shaft or shafts. A mechanical differential disposed within said housing for applications requiring differential speeds of said axle output shafts. The housing being formed by three housing members and joined together along a substantially planar and horizontally peripheral seam formed therebetween such that two of said housing members are to one side of said seam and join with the third housing element.Type: ApplicationFiled: June 6, 2003Publication date: October 23, 2003Applicant: HYDRO-THOMA LIMITEDInventors: Christian Helmut Thoma, George Duncan McRae Arnold
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Patent number: 6626065Abstract: A hydrostatic transmission and gear transmission located in the same or separate housings structures, and mechanically drivingly connected together by a power transmission shaft. That housing structure surrounding the hydrostatic transmission defining a first internal volume containing the hydrostatic transmission components and providing a receptacle for the hydrostatic fluid. That housing structure surrounding the gear transmission defining a gear compartment sump. As one example, the housing structure surrounding the hydrostatic transmission may further define a second internal volume to operate as an overflow receiver for fluid transferred from the first internal volume. A duct operating in accordance with the siphon principle connects the internal volumes and where a pressure restriction valves ensures an above ambient pressure level in the volumes when the hydrostatic and gear transmission is operating. Alternatively, the gear compartment sump may act as the second internal volume.Type: GrantFiled: May 15, 2001Date of Patent: September 30, 2003Assignee: Hydro-Thoma LimitedInventors: George Duncan McRae Arnold, Christian Helmut Thoma
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Publication number: 20030166430Abstract: A parallel hydromechanical continuously variable transmission has a housing that holds a make-up pump, and has internal cavities for holding operating assemblies of the transmission, including an axial piston pump and an axial piston motor. The pump and motor each have a rotating element and a non-rotating element. Each rotating element has a center of mass and an axis of rotation that passes through the center of mass. Each non-rotating pump element is mounted for tilting movement on trunnions in its own respective pair of mounting journals in the housing. The tilting axes of the non-rotating elements lie transverse to the axes of rotation of the rotating element. The pump and the motor are disposed side-by-side in the housing with the axes of rotation approximately parallel to each other. A stationary manifold, fixed to the housing, has one surface in contact with the rotating pump element and a second surface in contact with the rotating motor element.Type: ApplicationFiled: March 11, 2003Publication date: September 4, 2003Applicant: Folsom Technologies, Inc.Inventors: Lawrence R. Folsom, Clive Tucker
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Publication number: 20030162618Abstract: In a working vehicle, a variable output HST and a planetary gear unit are connected with an engine, which is supported on a vehicle frame closer to a first side of a fore and aft direction of the vehicle in vibration free manner so as to together constitute a driving-side unit, which is integrally supported on the vehicle frame in vibration free manner. A transmission case of a transmission is fixedly supported on the vehicle frame closer to a second side of the fore and aft direction of the vehicle with a distance from the driving-side unit. An output element of the planetary gear unit is operatively connected with a wheel drive train of the transmission via a shaft coupling extending along the fore and aft direction of the vehicle.Type: ApplicationFiled: January 13, 2003Publication date: August 28, 2003Applicant: Kanzaki Kokyukoki Mfg. Co., Ltd.Inventors: Toshiyuki Hasegawa, Atsuo Yoshina, Shigenori Sakikawa