IP Library Granted Patent US 7,451,587
Granted Patent B2
US 7,451,587 · App. 11/268,528 · Granted Nov 18, 2008

Mower tractor

Assignee: Yanmar Co., Ltd.
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Quick Facts
Patent No.
US 7,451,587
App. No.
11/268,528
Granted
Nov 18, 2008
Kind
B2
Abstract

A mower tractor ( 1 ) comprises: a mid-mount mower ( 5 ) under a middle bottom portion thereof between front wheels ( 2;2 ) and rear wheels ( 3;3 ); a body frame ( 8 ); a transmission casing ( 24 ) having an input shaft ( 58 ) disposed laterally eccentrically in the body frame ( 8 ); an engine ( 23 ) having an output shaft ( 55 ); a propeller shaft ( 14 ) and universal joints ( 27 ) interposed between the output shaft ( 55 ) of the engine ( 23 ) and the input shaft ( 58 ) of the transmission casing ( 24 ); and a device ( 60 ) for restricting height of the mower ( 5 ) disposed between the propeller shaft and the body frame.

Claims (55)

1. A mower tractor, comprising:

a mid-mount mower under a middle bottom portion thereof between front wheels and rear wheels;

a body frame;

a transmission casing having an input shaft disposed laterally eccentrically in the body frame;

an engine having an output shaft;

a propeller shaft interposed between the output shaft of the engine and the input shaft of the transmission casing;

a height restricting device for restricting height of the mower disposed between the propeller shaft and the body frame and in front of said transmission casing;

a lifting device disposed at a rear portion of the body frame behind the transmission casing; and

a connection member disposed on one of left and right sides of the transmission casing so as to connect the lifting device to the height restricting device, wherein the height restricting device is disposed laterally opposite to the connection member with respect to the propeller shaft.

2. The mower tractor according to claim 1 , further comprising:

a reinforcing bracket spanned between left and right portions of the body frame at a position forwardly downward from the input shaft of the transmission casing, wherein the height restricting device for restricting height of the mower is disposed on the reinforcing bracket.

3. The mower tractor according to claim 1 , wherein the height restricting device is disposed on a fore-and-aft extension line from the connection member, and the height restricting device is integrally formed with a connection portion connected to the connection member.

4. The mower tractor according to claim 1 , wherein universal joints are interposed between the output shaft of the engine and the propeller shaft, and between the input shaft of the transmission casing and the propeller shaft, respectively.

5. A mower tractor comprising:

a mid-mount mower under a middle bottom portion thereof between front wheels and rear wheels;

a body frame;

a transmission casing having an input shaft disposed laterally eccentrically in the body frame;

an engine having an output shaft;

a propeller shaft interposed between the output shaft of the engine and the input shaft of the transmission casing;

a height restricting device for restricting height of the mower disposed between the propeller shaft and the body frame and in front of said transmission casing;

a lifting device disposed at a rear portion of the body frame behind the transmission casing; and

a connection member disposed on one of left and right sides of the transmission casing so as to connect the lifting device to the height restricting device, wherein a speed controlling link member connected to the transmission casing is disposed laterally opposite to the connection member with respect to the propeller shaft.

6. The mower tractor according to claim 5 , wherein the speed controlling link member is disposed between the propeller shaft and the body frame above the height restricting device.

7. The mower tractor according to claim 5 , wherein universal joints are interposed between the output shaft of the engine and the propeller shaft, and between the input shaft of the transmission casing and the propeller shaft, respectively.

8. The mower tractor according to claim 5 , further comprising:

a reinforcing bracket spanned between left and right portions of the body frame at a position forwardly downward from the input shaft of the transmission casing, wherein the height restricting device for restricting height of the mower is disposed on the reinforcing bracket.

9. The mower tractor according to claim 5 , wherein the height restricting device is disposed on a fore-and-aft extension line from the connection member, and the height restricting device is integrally formed with a connection portion connected to the connection member.

10. The mower tractor according to claim 5 , wherein the height restricting device is disposed laterally opposite to the connection member with respect to the propeller shaft.

11. A mower tractor, comprising:

a mid-mount mower under a middle bottom portion thereof between front wheels and rear wheels;

a body frame;

a transmission casing having an input shaft disposed laterally eccentrically in the body frame;

an engine having an output shaft;

a propeller shaft interposed between the output shaft of the engine and the input shaft of the transmission casing;

a height restricting device for restricting height of the mower disposed between the engine and the transmission casing and in front of said transmission casing;

a lifting device disposed at a rear portion of the body frame behind the transmission casing; and

a connection member disposed on one of left and right sides of the transmission casing so as to connect the lifting device to the height restricting device, wherein the height restricting device is disposed laterally opposite to the connection member with respect to the propeller shaft.

12. The mower tractor according to claim 11 , further comprising:

a reinforcing bracket spanned between left and right portions of the body frame at a position forwardly downward from the input shaft of the transmission casing, wherein the height restricting device for restricting height of the mower is disposed on the reinforcing bracket.

13. The mower tractor according to claim 11 , wherein the height restricting device is disposed on a fore-and-aft extension line from the connection member, and the height restricting device is integrally formed with a connection portion connected to the connection member.

14. The mower tractor according to claim 11 , wherein universal joints are interposed between the output shaft of the engine and the propeller shaft, and between the input shaft of the transmission casing and the propeller shaft, respectively.

15. A mower tractor comprising:

a mid-mount mower under a middle bottom portion thereof between front wheels and rear wheels;

a body frame;

a transmission casing having an input shaft disposed laterally eccentrically in the body frame;

an engine having an output shaft;

a propeller shaft interposed between the output shaft of the engine and the input shaft of the transmission casing;

a height restricting device for restricting height of the mower disposed between the engine and the transmission casing and in front of said transmission casing;

a lifting device disposed at a rear portion of the body frame behind the transmission casing; and

a connection member disposed on one of left and right sides of the transmission casing so as to connect the lifting device to the height restricting device wherein a speed controlling link member connected to the transmission casing is disposed laterally opposite to the connection member with respect to the propeller shaft.

16. The mower tractor according to claim 15 , wherein the speed controlling link member is disposed between the propeller shaft and the body frame above the height restricting device.

17. The mower tractor according to claim 15 , wherein universal joints are interposed between the output shaft of the engine and the propeller shaft, and between the input shaft of the transmission casing and the propeller shaft, respectively.

18. The mower tractor according to claim 15 , farther comprising:

a reinforcing bracket spanned between left and right portions of the body frame at a position forwardly downward from the input shaft of the transmission casing, wherein the height restricting device for restricting height of the mower is disposed on the reinforcing bracket.

19. The mower tractor according to claim 15 , wherein the height restricting device is disposed on a fore-and-aft extension line from the connection member, and the height restricting device is integrally formed with a connection portion connected to the connection member.

Assignments (2)
CHANGE OF NAME Recorded Aug 26, 2020
From: YANMAR CO., LTD.
To: YANMAR POWER TECHNOLOGY CO., LTD.
Reel/Frame 054162/0112 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 10, 2006
From: KOMIYA, TOSHITAKA; IBE, TOSHIHIKO; MENO, TAKATOSHI
To: YANMAR CO., LTD.
Reel/Frame 016995/0524 →
Priority Claims (4)
JP 2003-130317 · May 8, 2003 · national
JP 2003-142371 · May 20, 2003 · national
JP 2003-145371 · May 22, 2003 · national
JP 2003-149389 · May 27, 2003 · national
Continuity (2)
Continuation PCTJP200400623400 · Apr 28, 2004
Related Publication 20060090442A1 · May 4, 2006