Other

Kanzaki Kokyukoki Mfg. Co., Ltd.

Tuff Torq Corporation

Tuff Toro Corporation

Robert Abend

Ryota Ohashi

Norihiro Ishii

Hideaki Okada

Hiroaki Shimizu

Toshiyuki Hasegawa

Keith Johnson Andrews

Koji Irikura

Travis S McCloud

Hirohiko Kawada

Kenichi Takada

Kerwyn Stoll

Michio Tsukamoto

Krista Winfree

Kohji Irikura

An axle driving apparatus for being mounted on the body frame of a vehicle and for independently rotating drive wheel members. The axle driving apparatus includes a first axle driving unit (L) having a housing () and a single axle (L), the single axle (L) defining a proximal end portion rotatbly mounted in the housing () and a distal end portion extending outwardly from a first side of the housing (). An enlarged region is defined by the housing (), with the enlarged region extending substantially perpendicular to the longitudinal axis of the single axle (L). A hydraulic stepless speed change assembly () is disposed within the enlarged region. The speed change assembly () includes a hydraulic pump () having an input shaft () projecting from the enlarged region and includes a hydraulic motor () including an output shaft () driving connected to the single axle (L). The first axle driving unit (L) is used in conjunction with a second axle driving unit (L) on the body frame of the vehicle and which is of substantially similar construction. However, the second axle driving unit (R) features a single axle (R) which extends outwardly from a second, opposite side of the housing () such that the axles (L,R) are oppositely disposed.

Axle driving apparatus

An axle driving apparatus for being mounted on the body frame of a vehicle and for independently rotating drive wheel members. The axle driving apparatus includes a first axle driving unit (L) having a housing () and a single axle (L), the single axle (L) defining a proximal end portion rotatably mounted in the housing () and a distal end portion extending outwardly from a first side of the housing (). An enlarged region is defined by the housing (), with the enlarged region extending substantially perpendicular to the longitudinal axis of the single axle (L). A hydraulic stepless speed change assembly () is disposed within the enlarged region. The speed change assembly () includes a hydraulic pump () having an input shaft () projecting from the enlarged region and includes a hydraulic motor () including an output shaft () drivingly connected to the single axle (L). The first axle driving unit (L) is used in conjunction with a second axle driving unit (R) which is adjacently disposed to the first axle driving unit (L) on the body frame of the vehicle and which is of substantially similar construction. However, the second axle driving unit (R) features a single axle (R) which extends outwardly from a second, opposite side of the housing () such that the axles (L,R) are oppositely disposed.

An axle driving unit includes an axle, a hydraulic pump, a hydraulic motor having a motor shaft on which an output gear is provided to be drivingly connected to said axle, a center section having a pump mounting surface and a motor mounting surface onto which the hydraulic pump and the hydraulic motor are mounted respectively so as to be fluidly connected with each other through the center section, a housing constituted by a first housing part and a second housing part joined to each other at a joint surface, a projection integrally formed on the center section so as to be fitted to the housing, thereby fixing a position of the center section relative to the housing, and a fastener fastening the center section to the first housing part. The pump mounting surface and said motor mounting surface may be disposed perpendicular to each other. Said pump mounting surface and said motor mounting surface are disposed perpendicular to each other. The projection may be extended in parallel to the pump mounting surface and perpendicular to the motor mounting surface.

Axle driving unit for a lawn tractor

An axle driving system which houses in a housing thereof a hydrostatic transmission, axles, and a driving gear train for connecting output means of the hydraulic transmission and axles, so as to transmit power from a driving source to the hydrostatic transmission and to change the speed, thereby driving the axles. A first chamber therein contains the hydrostatic transmission and a second chamber therein contains the driving gear train. Both the first and second chambers are independent of each other so as to prevent a foreign object, such as iron powder produced in the driving gear train, from entering the hydrostatic transmission. The system includes an L-like-shaped center section on which the hydrostatic transmission is offset such that an imaginary plane which includes a motor mounting surface passes in proximity to the axis of a pump shaft. The pump shaft is disposed perpendicular to the axles. The motor shaft is disposed in parallel thereto. A hydraulic pump is positioned between the hydraulic motor and the axles, so that the housing for the hydrostatic transmission, axles and driving gear train, is smaller in width to thereby make the system more compact.

Axle driving system

An axle driving apparatus for being mounted on the body frame of a vehicle and for independently rotating drive wheel members. The axle driving apparatus includes a first axle driving unit (L) having a housing () and a single axle (L), the single axle (L) defining a proximal end portion rotatably mounted in the housing () and a distal end portion extending outwardly from a first side of tile housing (). An enlarged region is defined by the housing (), with the enlarged region extending substantially perpendicular to the longitudinal axis of the single axle (L). A hydraulic stepless speed change assembly () is disposed within the enlarged region. The speed change assembly () includes a hydraulic pump () having an input shaft () projecting from the enlarged region aid includes a hydraulic motor () including an output shaft () drivingly connected to the single axle (L). The first axle driving unit (L) is used in conjunction with a second axle driving unit (R) which is adjacently disposed to the first axle driving unit (L) on the body frame of the vehicle and which is of substantially similar construction. However, the second axle driving unit (R) features a single axle (R) which extends outwardly from a second, opposite side of the housing () such that the axles (L,R) are oppositely disposed.

An axle driving apparatus for being mounted on the body frame of a vehicle and for independently rotating drive wheel members. The axle driving apparatus includes a first axle driving unit (L) leaving a housing () and a single axle (L), the single axle (L) defining a proximal end portion rotatably mounted in the housing () and a distal end portion extending outwardly from a first side of the housing (). An enlarged region is defined by the housing (), with the enlarged region extending substantially perpendicular to the longitudinal axis of the single axle (L). A hydraulic stepless speed change assembly () is disposed within the enlarged region. The speed change assembly () includes a hydraulic pump () having an input shaft () projecting from the enlarged region and includes a hydraulic motor () including an output shaft () drivingly connected to the single axle (L). The first axle driving unit (L) is used in conjunction with a second axle driving unit (R) which is adjacently disposed to the first axle driving unit (L) on the body frame of the vehicle and which is of substantially similar construction. However, the second axle driving unit (R) features a single axle (R) which extends outwardly from a second, opposite side of the housing () such that the axles (L,R) are oppositely disposed.

An axle driving apparatus for a vehicle includes an axle, a vertical pump shaft, a hydraulic pump having a movable swash plate, a pair of trunnion shafts provided coaxially at respective opposite sides of the movable swash plate, a hydraulic motor having a motor shaft drivingly connected to the axle, and a housing containing the hydraulic pump, the hydraulic motor, and the axle. The housing includes a first housing member and a second housing member separably jointed along a vertical plane perpendicular to a rotary axis of the axle. A rotary axis of the hydraulic pump is substantially parallel to the vertical plane. The hydraulic pump is entirely disposed in the first housing member. A rotary axis of the trunnion shafts is substantially perpendicular to the vertical plane. One of the trunnion shafts is rotatably supported by the first housing member and the other of the trunnion shafts is rotatably supported by the second housing member, whereby the movable swash plate is slantingly rotatably supported in the housing.

An axle driving apparatus includes a housing for supporting an axle, a hydrostatic transmission including a hydraulic pump, a hydraulic motor, and a center section. The center section has a pump mounting surface and a motor mounting surface substantially perpendicular to each other. A rotational axis of a motor shaft is disposed lower than a plane located at the pump mounting surface. The center section includes a narrow portion and a wide portion. The narrow portion is defined between a first side and a second side opposite the first side in a direction along the rotational axis of the motor shaft. The wide portion is formed adjacent to the narrow portion. A first extension of the wide portion is defined by a width that extends from the first side in the direction along the rotational axis of the motor shaft and a length that extends in a direction perpendicular to the rotational axis of the motor shaft. A second extension of the wide portion is generally defined by the pump mounting surface formed thereon.

Growing community of inventors

Adairsville, GA, United States of America

Robert Abend