Operation mechanism of work vehicle and work vehicle

Patent metadata

Field	Value
Publication number	US-11186171-B2
Application number	US-202016832065-A
Country	US
Kind code	B2
Filing date	Mar 27, 2020
Priority date	Apr 1, 2019
Publication date	Nov 30, 2021
Grant date	Nov 30, 2021

Abstract

Provided is an operation mechanism of a work vehicle capable of suppressing transmission of vibration from a vehicle body to a cabin. The operation mechanism of a work vehicle includes: a first link portion which is supported by the vehicle body (a center frame, a transmission, and the like); a second link portion which is supported by a cabin placed on the vehicle body; and a third link portion which has flexibility and connects the first link portion and the second link portion so as to be interlockable.

First claim

What is claimed is:

1. An operation mechanism of a work vehicle comprising:
a first link portion which is supported by the vehicle body, wherein the first link portion is connected to a transmission such that a shift stage of the transmission is changeable;
a second link portion which is supported by a cabin placed on the vehicle body, wherein the second link portion is connected to an operation tool capable of changing the shift stage of the transmission; and
a third link portion which has flexibility and connects the first link portion and the second link portion so as to be interlockable, wherein the third link portion includes a wire that is configured to be deformed when a force is applied in a compressive direction, and is configured to suppress a vibration transmitted from the first link portion to the second link portion.

2. The operation mechanism of a work vehicle according to claim 1 , wherein
the second link portion includes:
a first rotation member which is rotatably supported with respect to a bottom surface of the cabin;
a second rotation member which is disposed to be at least partially positioned inside the cabin and is rotatably supported by the cabin; and
a connection member which connects the first rotation member and the second rotation member.

3. The operation mechanism of a work vehicle according to claim 2 , wherein
the connection member includes:
a first connection portion which is connected to the first rotation member;
a second connection portion which is connected to the second rotation member; and
a third connection portion, which is disposed at a position higher than the first connection portion and lower than the second connection portion, and to which the third link portion is connected.

4. The operation mechanism of a work vehicle according to claim 3 , wherein
the third connection portion is disposed to be displaced with respect to the first connection portion in a right-left direction.

5. The operation mechanism of a work vehicle according to claim 1 , wherein
the operation tool is provided in a console disposed on right and left sides of a seat.

6. The operation mechanism of a work vehicle according to claim 5 , wherein
the operation tool is a cruise lever capable of keeping the shift stage of the transmission constant.

7. The operation mechanism of a work vehicle according to claim 6 , wherein
the second link portion includes:
a first rotation member which is rotatably supported with respect to a bottom surface of the cabin;
a second rotation member which is disposed to be at least partially positioned inside the cabin and is rotatably supported by the cabin; and
a connection member which connects the first rotation member and the second rotation member.

8. The operation mechanism of a work vehicle according to claim 7 , wherein
the connection member includes:
a first connection portion which is connected to the first rotation member;
a second connection portion which is connected to the second rotation member; and
a third connection portion, which is disposed at a position higher than the first connection portion and lower than the second connection portion, and to which the third link portion is connected.

9. The operation mechanism of a work vehicle according to claim 5 , wherein
the second link portion includes:
a first rotation member which is rotatably supported with respect to a bottom surface of the cabin;
a second rotation member which is disposed to be at least partially positioned inside the cabin and is rotatably supported by the cabin; and
a connection member which connects the first rotation member and the second rotation member.

10. The operation mechanism of a work vehicle according to claim 9 , wherein
the connection member includes:
a first connection portion which is connected to the first rotation member;
a second connection portion which is connected to the second rotation member; and
a third connection portion, which is disposed at a position higher than the first connection portion and lower than the second connection portion, and to which the third link portion is connected.

11. The operation mechanism of a work vehicle according to claim 1 , wherein
the operation tool is a cruise lever capable of keeping the shift stage of the transmission constant.

12. The operation mechanism of a work vehicle according to claim 11 , wherein
the second link portion includes:
a first rotation member which is rotatably supported with respect to a bottom surface of the cabin;
a second rotation member which is disposed to be at least partially positioned inside the cabin and is rotatably supported by the cabin; and
a connection member which connects the first rotation member and the second rotation member.

13. The operation mechanism of a work vehicle according to claim 12 , wherein
the connection member includes:
a first connection portion which is connected to the first rotation member;
a second connection portion which is connected to the second rotation member; and
a third connection portion, which is disposed at a position higher than the first connection portion and lower than the second connection portion, and to which the third link portion is connected.

14. A work vehicle comprising:
the operation mechanism according to claim 1 .

Assignees

• Kubota Kk

Inventors

• Miyazaki Daisuke
• Masumoto Koji
• Ushiro Kenzo
• Ezaki Hideaki

Classifications

• B60K20/04 Primary

  floor mounted · CPC title

• B60Y2200/22

  Agricultural vehicles · CPC title

• B62D49/0692

  characterised by the particular arrangement of control devices, e.g. having more than one control stand, operable from vehicle extension (control devices or systems characterised by mechanical features only) · CPC title

• B60K20/02 Primary

  of initiating means · CPC title