Work tool mounting mechanism

Patent metadata

Field	Value
Publication number	US-12435485-B2
Application number	US-202217975815-A
Country	US
Kind code	B2
Filing date	Oct 28, 2022
Priority date	Sep 9, 2021
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

A working tool mounting mechanism for a tractor, includes: an extensible cylinder that is disposed on a tip of a boom of a front loader of the tractor, and comprises a cylinder body and a rod slidable with respect to the cylinder body; engaging parts that are respectively disposed on the cylinder body and the rod, and are each movable between an engagement position and a release position with extension and contraction of the extensible cylinder, the engaging parts each engaging with a working tool detachably attached to the boom at the engagement position, and not engaging with the working tool at the release position; a cover that covers the extensible cylinder from one direction; and a frame that is fixed to the cover and restricts at least one of: movement of the cylinder body and the rod in an extensible direction exceeding a predetermined position with the extension and contraction of the extensible cylinder, and rotation of the extensible cylinder around an axial direction.

First claim

The invention claimed is:

1. A working tool mounting mechanism for a tractor, comprising:
an extensible cylinder that:
is disposed on a tip of a boom of a front loader of the tractor, and
comprises a cylinder body and a rod slidable with respect to the cylinder body;

engaging parts that:
are respectively disposed on the cylinder body and the rod, and
are each movable between an engagement position and a release position with extension and contraction of the extensible cylinder, wherein each of the engaging parts engages with a working tool detachably attached to the boom at the engagement position, and does not engage with the working tool at the release position;

a cover that covers the extensible cylinder from one direction; and
a frame that is fixed to the cover and restricts at least one of:
movement of the cylinder body and the rod in an extensible direction exceeding a predetermined position with the extension and contraction of the extensible cylinder, and
rotation of the extensible cylinder around an axial direction, wherein

the engaging parts include:
linking parts respectively coupled to the cylinder body and the rod, and
extending parts extending from the linking parts in the extensible direction, and the frame contacts the linking parts and restricts at least one of the movement and the rotation.

2. The working tool mounting mechanism according to claim 1 , wherein
the frame surrounds the extensible cylinder from the extensible direction and a direction perpendicular to the extensible direction.

3. The working tool mounting mechanism according to claim 1 , further comprising:
joint rods that fix the linking parts to the cylinder body and the rod, wherein
the frame contacts the joint rods and restricts at least one of the movement and the rotation.

4. The working tool mounting mechanism according to claim 3 , wherein
each of the joint rods passes through one of the linking parts and the cylinder body or the rod, and
the frame restricts the rotation by contacting both ends of the joint rods between which each of the linking parts and the cylinder body or the rod are sandwiched.

5. The working tool mounting mechanism according to claim 1 , wherein
the extending parts are at positions each eccentric with respect to an axis of the extensible cylinder.

6. The working tool mounting mechanism according to claim 1 , wherein
the cover comprises an opening through which each of the engaging parts is visible from an exterior.

7. The working tool mounting mechanism according to claim 6 , wherein
the opening is at a position at which each of the linking parts at the engagement position is visible from the exterior, and at which each of the linking parts at the release position is not visible from the exterior.

Assignees

• Kubota Kk

Inventors

• Torii Shin
• Hirakawa Koshiro

Classifications

• E02F3/3663

  hydraulically-operated · CPC title

• E02F9/2271

  Actuators and supports therefor and protection therefor · CPC title

• E02F3/3631

  with a hook and a transversal locking element · CPC title

• E02F3/3636 Primary

  using two or four movable transversal pins · CPC title