US 6,119,552 A · Transmission for a working vehicle

Abstract

A transmission for a working vehicle like a tractor of the invention is housed in a transmission housing 1 interposed between an engine and a rear axle housing 2. An interior of transmission housing 1 is divided into a front chamber A and a rear chamber B through a partition wall 1a. In front chamber A is disposed a main-clutch system partition centering a traveling-input shaft 7. In rear chamber B is disposed a speed-changing system as a combination of reversing arrangement and multi-speed-changing arrangement. In a rear opening of housing 1 is disposed a bearing plate 3. In rear chamber B, a first speed-changing shaft 8, a second speed-changing shaft 9 and a front transmission output shaft 10 are supported in parallel between wall 1a and plate 3. A regular speed-reduction gear train and a reversing speed-reduction gear train are interposed between shafts 8 and 9, so that shafts 8 and 9 can be connected with each other through one of the gear trains by a first clutch device C1 on shaft 8. A second clutch device C2 is on shaft 9 so as to selectively connect shafts 7 and 9 directly. A plurality of gear trains for multi-speed stages are interposed between shafts 9 and 10, so that shafts 9 and 10 are connected with each other through one of the gear trans by a third clutch device C3 on shaft 10. A cover 51 is settled on housing 1. A main (second) speed-changing lever 52 and a sub (first) speed-changing lever 52 are disposed respectively at both lateral sides of cover 51. Third clutch device C3 is operated by lever 52. First and second clutch devices C1 and C2 are selectively operated by lever 55.

Claims25

Dependent claims

A transmission for a working vehicle comprising:

a rear-axle housing having a travelling output system disposed therein;
a transmission housing coupled to said rear-axle housing and interposed between an engine and said rear-axle housing, wherein said transmission housing has a front end opening and a rear end opening and an interior of said transmission housing is divided into a first chamber and a second chamber through a partition wall;
a main-clutch system connected with an output portion of said engine, wherein said main-clutch system is inserted into said transmission housing through said front end opening so as to be disposed in said first chamber;
a speed-changing system for transmitting power from said main-clutch system to drive wheels, wherein said speed-changing system is inserted into said transmission housing through said rear end opening so as to be disposed in said second chamber;
and
a bearing plate attached to said rear-axle housing and not attached to said transmission housing, said bearing plate forming a rear wall of said transmission housing, wherein said speed-changing system is supported between said partition wall and said bearing plate in said second chamber and a front end of said travelling output system is supported by said bearing plate.

3 more elements

A transmission for a working vehicle comprising:

a rear-axle housing having a travelling output system disposed therein;
a transmission housing coupled to said rear-axle housing and interposed between an engine and said rear-axle housing, wherein said transmission housing has a front end opening and a rear end opening and an interior of said transmission housing is divided into a first chamber and a second chamber through a partition wall;
a main-clutch system connected with an output portion of said engine, wherein said main-clutch system is inserted into said transmission housing through said front end opening so as to be disposed in said first chamber;
a speed-changing system for transmitting power from said main-clutch system to drive wheels, wherein said speed-changing system is inserted into said transmission housing through said rear end opening so as to be disposed in said second chamber;
and
a bearing plate attached to said transmission housing and not attached to said rear-axle housing, said bearing plate forming a rear wall of said transmission housing, wherein said speed-changing system is supported between said partition wall and said bearing plate in said second chamber and a front end of said travelling output system is supported by said bearing plate.

3 more elements

A transmission for a working vehicle comprising:

a rear-axle housing having a travelling output system disposed therein;
a transmission housing coupled to said rear-axle housing and interposed between an engine and said rear-axle housing, wherein said transmission housing has a front end opening and a rear end opening and an interior of said transmission housing is divided into a first chamber and a second chamber through a partition wall;
a main-clutch system connected with an output portion of said engine, wherein said main-clutch system is inserted into said transmission housing through said front end opening so as to be disposed in said first chamber;
a speed-changing system for transmitting power from said main-clutch system to drive wheels, wherein said speed-changing system is inserted into said transmission housing through said rear end opening so as to be disposed in said second chamber;
and
a bearing plate disposed entirely within said transmission housing and said rear-axle housing, said bearing plate forming a rear wall of said transmission housing, wherein said speed-changing system is supported between said partition wall and said bearing plate in said second chamber and a front end of said travelling output system is supported by said bearing plate.

3 more elements

Dependencies are inferred from the claim text.

Transmission for a working vehicle

Life of this patent

Transmission for a working vehicle

Life of this patent

Abstract

Claims25