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Tractor Variable Speed Transmission Device And Tractor
Abstract: Provided is a variable speed transmission device for a tractor the device having a narrow vertical width or horizontal width and having a short longitudinal length. A variable speed output unit 23 is present further to a rearward side of a vehicle body than a compound planetary transmission unit 22. A planetary unit output axis center 22Y and a variable speed unit input axis center 23X have the same axis center. A motive power transmission unit 24 from an engine 6 to a continuously variable transmission unit 21 and the compound planetary transmission unit 22 is provided with a rotation transmission shaft 80 connected in a coordinated manner to an output shaft 6a of the engine 6 and extending along the longitudinal direction of the vehicle body a pump transmission unit 85 that inputs motive power from the rotation transmission shaft 80 into the continuously variable transmission unit 21 and a planetary transmission unit 81 that inputs motive power from the rotation transmission shaft 80 into the compound planetary transmission unit 22. The rotation transmission shaft 80 is located further to the rearward side of the vehicle body than the engine 6 and is parallel with respect to a motor shaft 50a and a pump shaft 51a. The continuously variable transmission unit 21 and both the compound planetary transmission unit 22 and the variable speed output unit 23 are present in the same place in the longitudinal direction of the vehicle body.
Notices, Deadlines & Correspondence
Patent Information
Applicants
KUBOTA CORPORATION
Inventors
1. TSUCHIDA, Tomonari
2. HANA, Hidetoshi
3. IWASE, Ryoma
Claims
1. A shift power transmission apparatus of a tractor, the apparatus comprising: a hydrostatic continuously variable transmission unit that includes a hydraulic 5 pump and a hydraulic motor, and is configured to receive motive power of an engine and output motive power of stepless rotational speed by changing a speed of the received motive power; a combined planetary power transmission unit that is configured to receive speed-changed output of the continuously variable transmission unit and motive power 10 of the engine that is not subjected to speed change action by the continuously variable transmission unit, and combine the received speed-changed output and motive power of the engine, and output combined motive power; and a shift output unit that includes a plurality of stage clutches and a shift output shaft that supports the plurality of stage clutches in a state of being arranged in a 15 vehicle front-rear direction, the shift output unit being configured to receive the combined motive power from the combined planetary power transmission unit, and divide a speed range of the received combined motive power into a plurality of stages, and output the received combined motive power from the shift output shaft toward a travel apparatus, 20 wherein the continuously variable transmission unit is provided in a state where the continuously variable transmission unit is located further toward a vehicle rear side than the engine is, the the continuously variable transmission unit having a motor shaft and a pump shaft that extend in the vehicle front-rear direction, the combined planetary power transmission unit is provided in a state where 25 the combined planetary power transmission unit is located further toward the vehicle rear side than the engine is, the combined planetary power transmission unit having a single planetary unit input axis and a single planetary unit output axis, the planetary unit input axis extending in a direction along the vehicle front-rear direction and parallel to the motor shaft and the pump shaft, 30 the shift output unit is provided in a state where the shift output unit is located further toward the vehicle rear side than the combined planetary power transmission unit is, the shift output unit having a single shift unit input axis that extends coaxial with the planetary unit output axis, the apparatus further comprises a power transmission unit that is configured to 35 transmit the motive power of the engine to the continuously variable transmission unit and the combined planetary power transmission unit, the power transmission unit 30 including a rotary power transmission shaft, a pump transmission unit and a planetary transmission unit, the rotary power transmission shaft being located further toward the vehicle rear side than the engine is in a state of being interlockingly joined to an output shaft of the engine, the rotary power transmission shaft extending in a direction along 5 the vehicle front-rear direction and parallel to the motor shaft and the pump shaft, the pump transmission unit being configured to input motive power of the rotary power transmission shaft to the pump shaft, and the planetary transmission unit being configured to input motive power of the rotary power transmission shaft to the combined planetary power transmission unit, and 10 the continuously variable transmission unit is located at the same position as at least one of the combined planetary power transmission unit and the shift output unit in the vehicle front-rear direction.
2. The shift power transmission apparatus of a tractor according to claim 1, 15 wherein the pump transmission unit is configured to input the motive power of the rotary power transmission shaft to the pump shaft by accelerating the motive power, and the apparatus further comprises a second planetary transmission unit that is configured to input motive power of the motor shaft to the combined planetary power 20 transmission unit, the second planetary transmission unit being configured to input the motive power of the motor shaft by decelerating the motive power.
3. The shift power transmission apparatus of a tractor according to claim 1 or 2, wherein the planetary transmission unit is located further toward a vehicle front side 25 than the combined planetary power transmission unit is.
4. The shift power transmission apparatus of a tractor according to any one of claims 1 to 3, wherein the pump shaft is located further toward the vehicle rear side than the motor shaft is. 30
5. The shift power transmission apparatus of a tractor according to claim 4, wherein the pump shaft and the motor shaft are aligned in a straight line.
6. The shift power transmission apparatus of a tractor according to claim 4 or 5, 35 wherein the pump transmission unit is located further toward the vehicle rear side than the shift output unit is. 31
7. The shift power transmission apparatus of a tractor according to any one of claims 1 to 6, wherein the apparatus further comprises a forward/reverse switching apparatus that is provided on a rear side of the shift output unit, the forward/reverse 5 switching apparatus having an input shaft to which motive power that is output from the shift output shaft of the shift output unit is input, the forward/reverse switching apparatus being configured to output motive power of the input shaft to the travel apparatus by converting the motive power into forward travel motive power or reverse travel motive power, and 10 wherein the shift output unit and the forward/reverse switching apparatus are arranged in a front-rear direction in a state where an axis of the input shaft and an axis of the shift output shaft are coaxial with each other.
8. The shift power transmission apparatus of a tractor according to any one of 15 claims 1 to 7, wherein the apparatus further comprises a forward/reverse switching apparatus that is provided on a rear side of the shift output unit, the forward/reverse switching apparatus being configured to receive motive power that is output from the shift output unit, and output the received motive power from an output shaft to the travel apparatus by converting the motive power into forward travel motive power or 20 reverse travel motive power, and wherein the shift output unit and the forward/reverse switching apparatus are arranged in a front-rear direction in a state where a shift unit input axis of the shift output unit and an axis of the output shaft are coaxial with each other. 25 9. A tractor comprising the shift power transmission apparatus of a tractor according to any one of claims 1 to 8.
Specification
WE CLAIM:
1. A shift power transmission apparatus of a tractor, the apparatus comprising:
a hydrostatic continuously variable transmission unit that includes a hydraulic 5 pump and a hydraulic motor, and is configured to receive motive power of an engine
and output motive power of stepless rotational speed by changing a speed of the
received motive power;
a combined planetary power transmission unit that is configured to receive
speed-changed output of the continuously variable transmission unit and motive power 10 of the engine that is not subjected to speed change action by the continuously variable
transmission unit, and combine the received speed-changed output and motive power
of the engine, and output combined motive power; and
a shift output unit that includes a plurality of stage clutches and a shift output
shaft that supports the plurality of stage clutches in a state of being arranged in a 15 vehicle front-rear direction, the shift output unit being configured to receive the
combined motive power from the combined planetary power transmission unit, and
divide a speed range of the received combined motive power into a plurality of stages,
and output the received combined motive power from the shift output shaft toward a
travel apparatus,
20 wherein the continuously variable transmission unit is provided in a state
where the continuously variable transmission unit is located further toward a vehicle
rear side than the engine is, the the continuously variable transmission unit having a
motor shaft and a pump shaft that extend in the vehicle front-rear direction,
the combined planetary power transmission unit is provided in a state where 25 the combined planetary power transmission unit is located further toward the vehicle
rear side than the engine is, the combined planetary power transmission unit having a
single planetary unit input axis and a single planetary unit output axis, the planetary
unit input axis extending in a direction along the vehicle front-rear direction and
parallel to the motor shaft and the pump shaft,
30 the shift output unit is provided in a state where the shift output unit is located
further toward the vehicle rear side than the combined planetary power transmission
unit is, the shift output unit having a single shift unit input axis that extends coaxial
with the planetary unit output axis,
the apparatus further comprises a power transmission unit that is configured to 35 transmit the motive power of the engine to the continuously variable transmission unit
and the combined planetary power transmission unit, the power transmission unit
30
including a rotary power transmission shaft, a pump transmission unit and a planetary
transmission unit, the rotary power transmission shaft being located further toward the
vehicle rear side than the engine is in a state of being interlockingly joined to an output
shaft of the engine, the rotary power transmission shaft extending in a direction along
5 the vehicle front-rear direction and parallel to the motor shaft and the pump shaft, the
pump transmission unit being configured to input motive power of the rotary power
transmission shaft to the pump shaft, and the planetary transmission unit being
configured to input motive power of the rotary power transmission shaft to the
combined planetary power transmission unit, and
10 the continuously variable transmission unit is located at the same position as at
least one of the combined planetary power transmission unit and the shift output unit in the vehicle front-rear direction.
2. The shift power transmission apparatus of a tractor according to claim 1,
15 wherein the pump transmission unit is configured to input the motive power of the
rotary power transmission shaft to the pump shaft by accelerating the motive power, and
the apparatus further comprises a second planetary transmission unit that is configured to input motive power of the motor shaft to the combined planetary power 20 transmission unit, the second planetary transmission unit being configured to input the motive power of the motor shaft by decelerating the motive power.
3. The shift power transmission apparatus of a tractor according to claim 1 or 2,
wherein the planetary transmission unit is located further toward a vehicle front side
25 than the combined planetary power transmission unit is.
4. The shift power transmission apparatus of a tractor according to any one of
claims 1 to 3, wherein the pump shaft is located further toward the vehicle rear side
than the motor shaft is.
30
5. The shift power transmission apparatus of a tractor according to claim 4,
wherein the pump shaft and the motor shaft are aligned in a straight line.
6. The shift power transmission apparatus of a tractor according to claim 4 or 5,
35 wherein the pump transmission unit is located further toward the vehicle rear side than
the shift output unit is.
31
7. The shift power transmission apparatus of a tractor according to any one of
claims 1 to 6, wherein the apparatus further comprises a forward/reverse switching
apparatus that is provided on a rear side of the shift output unit, the forward/reverse
5 switching apparatus having an input shaft to which motive power that is output from
the shift output shaft of the shift output unit is input, the forward/reverse switching
apparatus being configured to output motive power of the input shaft to the travel
apparatus by converting the motive power into forward travel motive power or reverse
travel motive power, and
10 wherein the shift output unit and the forward/reverse switching apparatus are
arranged in a front-rear direction in a state where an axis of the input shaft and an axis of the shift output shaft are coaxial with each other.
8. The shift power transmission apparatus of a tractor according to any one of
15 claims 1 to 7, wherein the apparatus further comprises a forward/reverse switching
apparatus that is provided on a rear side of the shift output unit, the forward/reverse
switching apparatus being configured to receive motive power that is output from the
shift output unit, and output the received motive power from an output shaft to the
travel apparatus by converting the motive power into forward travel motive power or
20 reverse travel motive power, and
wherein the shift output unit and the forward/reverse switching apparatus are arranged in a front-rear direction in a state where a shift unit input axis of the shift output unit and an axis of the output shaft are coaxial with each other.
25 9. A tractor comprising the shift power transmission apparatus of a tractor
according to any one of claims 1 to 8.
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | Abstract_201947037353_17-09-2019.jpg | 2019-09-17 |
| 2 | 201947037353.pdf | 2019-09-17 |
| 3 | 201947037353-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [17-09-2019(online)].pdf | 2019-09-17 |
| 4 | 201947037353-STATEMENT OF UNDERTAKING (FORM 3) [17-09-2019(online)].pdf | 2019-09-17 |
| 5 | 201947037353-PRIORITY DOCUMENTS [17-09-2019(online)].pdf | 2019-09-17 |
| 6 | 201947037353-FORM 1 [17-09-2019(online)].pdf | 2019-09-17 |
| 7 | 201947037353-DRAWINGS [17-09-2019(online)].pdf | 2019-09-17 |
| 8 | 201947037353-DECLARATION OF INVENTORSHIP (FORM 5) [17-09-2019(online)].pdf | 2019-09-17 |
| 9 | 201947037353-COMPLETE SPECIFICATION [17-09-2019(online)].pdf | 2019-09-17 |
| 10 | 201947037353-CLAIMS UNDER RULE 1 (PROVISIO) OF RULE 20 [17-09-2019(online)].pdf | 2019-09-17 |
| 11 | 201947037353-FORM-26 [23-09-2019(online)].pdf | 2019-09-23 |
| 12 | Correspondence by Agent_General Power of Attorney_24-09-2019.pdf | 2019-09-24 |
| 13 | 201947037353-Proof of Right (MANDATORY) [03-01-2020(online)].pdf | 2020-01-03 |
| 14 | Correspondence by Agent_Form-1_06-01-2020.pdf | 2020-01-06 |
| 15 | 201947037353-FORM 3 [13-03-2020(online)].pdf | 2020-03-13 |
| 16 | 201947037353-FORM 3 [12-03-2021(online)].pdf | 2021-03-12 |
| 17 | 201947037353-FORM 18 [06-10-2021(online)].pdf | 2021-10-06 |
| 18 | 201947037353-FER.pdf | 2022-03-28 |
| 19 | 201947037353-OTHERS [15-07-2022(online)].pdf | 2022-07-15 |
| 20 | 201947037353-Information under section 8(2) [15-07-2022(online)].pdf | 2022-07-15 |
| 21 | 201947037353-FORM 3 [15-07-2022(online)].pdf | 2022-07-15 |
| 22 | 201947037353-FER_SER_REPLY [15-07-2022(online)].pdf | 2022-07-15 |
| 23 | 201947037353-DRAWING [15-07-2022(online)].pdf | 2022-07-15 |
| 24 | 201947037353-COMPLETE SPECIFICATION [15-07-2022(online)].pdf | 2022-07-15 |
| 25 | 201947037353-CLAIMS [15-07-2022(online)].pdf | 2022-07-15 |
| 26 | 201947037353-ABSTRACT [15-07-2022(online)].pdf | 2022-07-15 |
| 27 | 201947037353-Information under section 8(2) [19-01-2023(online)].pdf | 2023-01-19 |
| 28 | 201947037353-FORM 3 [19-01-2023(online)].pdf | 2023-01-19 |
| 29 | 201947037353-US(14)-HearingNotice-(HearingDate-06-02-2024).pdf | 2024-01-08 |
| 30 | 201947037353-Correspondence to notify the Controller [31-01-2024(online)].pdf | 2024-01-31 |
| 31 | 201947037353-Written submissions and relevant documents [12-02-2024(online)].pdf | 2024-02-12 |
| 32 | 201947037353-Retyped Pages under Rule 14(1) [12-02-2024(online)].pdf | 2024-02-12 |
| 33 | 201947037353-FORM 3 [12-02-2024(online)].pdf | 2024-02-12 |
| 34 | 201947037353-FORM 13 [12-02-2024(online)].pdf | 2024-02-12 |
| 35 | 201947037353-2. Marked Copy under Rule 14(2) [12-02-2024(online)].pdf | 2024-02-12 |
| 36 | 201947037353-PatentCertificate12-03-2024.pdf | 2024-03-12 |
| 37 | 201947037353-IntimationOfGrant12-03-2024.pdf | 2024-03-12 |
Search Strategy
| 1 | 393E_25-03-2022.pdf |