Work vehicle

Patent metadata

Field	Value
Publication number	US-12065010-B2
Application number	US-202318131928-A
Country	US
Kind code	B2
Filing date	Apr 7, 2023
Priority date	Apr 20, 2022
Publication date	Aug 20, 2024
Grant date	Aug 20, 2024

Abstract

A work vehicle, comprises: an operation section occupiable by an operator; a cabin accommodating the operation section; left and right suspension mechanisms via which a body of the work vehicle supports a left portion and a right portion of the cabin; and left and right lateral rods configured to allow the cabin to move upward and downward relative to the body and restrain the cabin from moving leftward and rightward relative to the body.

First claim

What is claimed is:

1. A work vehicle, comprising:
an operation section occupiable by an operator;
a cabin accommodating the operation section;
left and right suspension mechanisms via which a body of the work vehicle supports a left portion and a right portion of the cabin; and
left and right lateral rods configured to allow the cabin to move upward and downward relative to the body and restrain the cabin from moving leftward and rightward relative to the body,
wherein the right lateral rod is disposed rightward and laterally outward of the right suspension mechanism and is connected to the right portion of the cabin, and
the left lateral rod is disposed leftward and laterally outward of the left suspension mechanism and is connected to the left portion of the cabin.

2. The work vehicle according to claim 1 , wherein
the cabin is supported by the body,
the left and right suspension mechanisms are interjacent between the body and the cabin, and
the left and right lateral rods are interjacent between the body and the cabin.

3. The work vehicle according to claim 1 , wherein:
the right lateral rod extends rightward and laterally outward in an obliquely downward direction from the right portion of the cabin while the operator is not in the operation section;
the left lateral rod extends leftward and laterally outward in an obliquely downward direction from the left portion of the cabin while the operator is not in the operation section; and
the left and right suspension mechanisms are configured in such a manner that the left and right lateral rods extend in an orientation close to a horizontal orientation while the operator is in the operation section.

4. The work vehicle according to claim 1 , further comprising:
a right elastic body included in the right suspension mechanism and configured to define a limit of contraction of the right suspension mechanism; and
a left elastic body included in the left suspension mechanism and configured to define a limit of contraction of the left suspension mechanism.

5. The work vehicle according to claim 1 , further comprising:
a right rebound spring included in the right suspension mechanism, and configured to apply resistance to extension of the right suspension mechanism and not apply resistance to contraction of the right suspension mechanism; and
a left rebound spring included in the left suspension mechanism, and configured to apply resistance to extension of the left suspension mechanism and not apply resistance to contraction of the left suspension mechanism.

6. A work vehicle, comprising:
an operation section occupiable by an operator;
a cabin accommodating the operation section;
left and right suspension mechanisms via which a body of the work vehicle supports a left portion and a right portion of the cabin;
left and right lateral rods configured to allow the cabin to move upward and downward relative to the body and restrain the cabin from moving leftward and rightward relative to the body;
a link mechanism disposed at a rear portion of the body and swingable upward and downward, extending rearward, and configured to support a work device;
lift arms disposed at the rear portion of the body and swingable upward and downward, and configured to raise and lower the link mechanism; and
lift cylinders connected to the body and the corresponding lift arms and configured to raise and lower the lift arms,
wherein the right lateral rod is disposed rightward and laterally outward of the right suspension mechanism and is connected to the right portion of the cabin,
the left lateral rod is disposed leftward and laterally outward of the left suspension mechanism and is connected to the left portion of the cabin,
the right suspension mechanism is disposed rightward and laterally outward of the lift arms and the lift cylinders, and supports a rear right portion of the cabin, and
the left suspension mechanism is disposed leftward and laterally outward of the lift arms and the lift cylinders, and supports a rear left portion of the cabin.

7. The work vehicle according to claim 6 , further comprising:
left and right rear axle cases extending leftward and rightward, respectively, and laterally outward from the rear portion of the body, and configured to hold left and right travel devices, respectively,
wherein the right lateral rod is connected to the rear right portion of the cabin and the right rear axle case, and
the left lateral rod is connected to the rear left portion of the cabin and the left rear axle case.

8. The work vehicle according to claim 7 , wherein:
the right lateral rod has a right portion disposed within the right travel device in such a manner that the right portion of the right lateral rod overlaps the right travel device in a back view, and
the left lateral rod has a left portion disposed within the left travel device in such a manner that the left portion of the left lateral rod overlaps the left travel device in a back view.

9. The work vehicle according to claim 8 , wherein:
the right lateral rod is disposed between the cabin and the right suspension mechanism in a side view, and
the left lateral rod is disposed between the cabin and the left suspension mechanism in a side view.

10. The work vehicle according to claim 9 , wherein:
the right suspension mechanism is connected to the rear right portion of the cabin and the right rear axle case, and
the left suspension mechanism is connected to the rear left portion of the cabin and the left rear axle case.

11. The work vehicle according to claim 10 , further comprising:
left and right support members attached respectively to the left and right rear axle cases,
wherein the right suspension mechanism and the right lateral rod are connected to the right support member, and
the left suspension mechanism and the left lateral rod are connected to the left support member.

12. The work vehicle according to claim 11 , further comprising:
a right lower limit stopper attached to the right support member and defining a lower limit position of upward and downward movement of the rear right portion of the cabin relative to the body; and
a left lower limit stopper attached to the left support member and defining a lower limit position of upward and downward movement of the rear left portion of the cabin relative to the body.

13. The work vehicle according to claim 11 , further comprising:
a right upper limit stopper attached to the right support member and defining an upper limit position of upward and downward movement of the rear right portion of the cabin relative to the body; and
a left upper limit stopper attached to the left support member and defining an upper limit position of upward and downward movement of the rear left portion of the cabin relative to the body.

14. The work vehicle according to claim 11 , further comprising:
fixing members holding the corresponding rear axle cases together with the corresponding support members; and
restraint rods configured to restrain the link mechanism from being displaced in a left-right direction and connected to the link mechanism and the corresponding fixing members,
wherein the support members are attached to the corresponding rear axle cases due to the support members and the corresponding fixing members being coupled to each other while holding the corresponding rear axle cases therebetween.

Assignees

• Kubota Kk

Inventors

• Kuribayashi Takumi

Classifications

• B60G2300/082

  Tractors · CPC title

• B60G2204/45

  Stops limiting travel · CPC title

• B60G2200/422

  Driving wheels or live axles · CPC title

• A01B59/068

  the lower arms being lifted or lowered by power actuator means provided externally on the tractor · CPC title

• B62D33/0604

  Cabs insulated against vibrations or noise, e.g. with elastic suspension (resilient connections between superstructure sub-units B62D27/04; damping noise in general G10K11/00; for vehicles in general B60R13/08) · CPC title