Front loader and working machine with left and right wires

Patent metadata

Field	Value
Publication number	US-10036138-B1
Application number	US-201715855096-A
Country	US
Kind code	B1
Filing date	Dec 27, 2017
Priority date	Dec 27, 2017
Publication date	Jul 31, 2018
Grant date	Jul 31, 2018

Abstract

A link operating mechanism is provided spanning a bucket and a stand. The link operating mechanism causes, using a swing force of the bucket, a bending/stretching link to bend so that propping and supporting of the bending/stretching link are released.

First claim

What is claimed is:

1. A front loader comprising:
a boom configured to be removably coupled to a vehicle body;
a bucket supported at a front end of the boom;
a stand configured to support the boom, when removed from the vehicle body, in a state in which the bucket is engaged on the ground;
a bending or stretching link that is provided spanning the boom and the stand, and is configured to prop and support the stand in a state in which the stand is engaged on the ground;
a link operating mechanism that is provided spanning the bucket and the stand, and is configured to cause, using a swing force of the bucket, the bending or stretching link to bend so that the propping and supporting of the bending or stretching link are released;
a holding member whose posture can be changed between a holding posture in which the holding member is engaged with the stand to hold the stand at a raised/stored position, and a releasing posture in which the holding member is disengaged from the stand;
an operation tool that is operably coupled to the holding member, the operation tool being operated by an operator to be at a locked position to change the posture of the holding member to the holding posture, and being operated by the operator to be at an unlocked position to change the posture of the holding member to the releasing posture;
wherein the boom includes a left boom coupled to a left lateral side portion of the vehicle body, and a right boom coupled to a right lateral side portion of the vehicle body,
the stand includes a left stand supported on the left boom, and a right stand supported by the right boom,
the holding member includes a left stand holding plate that acts on the left stand, and a right stand holding plate that acts on the right stand, and
the left stand holding plate and the right stand holding plate being coupled to and cooperating with the operation tool;
the front loader further comprising:
a left wire configured to operably couple the left stand holding plate to the operation tool; and
a right wire configured to operably couple the right stand holding plate to the operation tool,
wherein a position of the operation tool to which the left wire is coupled and a position of the operation tool to which the right wire is coupled can be changed and adjusted separately.

2. The front loader according to claim 1 ,
wherein the link operating mechanism includes a link operating member slidably supported on the stand, the link operating member being configured to abut and press against a lower portion of the bending or stretching link to release the propping and supporting of the bending or stretching link.

3. The front loader according to claim 2 ,
wherein the stand includes a pair of left and right longitudinal plate portions, and
the link operating member is arranged between the pair of left and right longitudinal plate portions.

4. The front loader according to claim 2 , further comprising:
a pressing operation pin that is provided on the bucket, the pressing operation pin being configured to abut, with a swing force of the bucket, against a bucket-side end location of the link operating member to press the link operating member.

5. The front loader according to claim 1 , further comprising:
an operation tool lock configured to be switchable between a locking state of holding the operation tool at the locked position, and an unlocking state of releasing holding of the operation tool at the locked position.

6. The front loader according to claim 5 ,
wherein an operation portion of the operation tool is provided with an unlock operation tool configured to switch the operation tool lock to the unlocking state.

7. The front loader according to claim 6 ,
wherein the operation portion is a grip arm, and the unlock operation tool is configured to be gripped together with the operation surface.

8. The front loader according to claim 1 , further comprising:
an elastic member configured to bias the holding member to the releasing posture.

9. The front loader according to claim 1 ,
wherein the holding member and the operation tool are operably coupled to each other via a wire.

10. A working machine comprising:
a vehicle body; and
a front loader configured to be supported by the front loader;
the front loader comprising:
a boom configured to be removably coupled to a vehicle body;
a bucket supported at a front end of the boom;
a stand configured to support the boom, when removed from the vehicle body, in a state in which the bucket is engaged on the ground;
a bending or stretching link that is provided spanning the boom and the stand, and is configured to prop and support the stand in a state in which the stand is engaged on the ground; and
a link operating mechanism that is provided spanning the bucket and the stand, and is configured to cause, using a swing force of the bucket, the bending or stretching link to bend so that the propping and supporting of the bending or stretching link are released;
a holding member whose posture can be changed between a holding posture in which the holding member is engaged with the stand to hold the stand at a raised/stored position, and a releasing posture in which the holding member is disengaged from the stand;
an operation tool that is operably coupled to the holding member, the operation tool being operated by an operator to be at a locked position to change the posture of the holding member to the holding posture, and being operated by the operator to be at an unlocked position to change the posture of the holding member to the releasing posture;
wherein the boom includes a left boom coupled to a left lateral side portion of the vehicle body, and a right boom coupled to a right lateral side portion of the vehicle body,
the stand includes a left stand supported on the left boom, and a right stand supported by the right boom,
the holding member includes a left stand holding plate that acts on the left stand, and a right stand holding plate that acts on the right stand, and
the left stand holding plate and the right stand holding plate being coupled to and cooperating with the operation tool;
the front loader further comprising:
a left wire configured to operably couple the left stand holding plate to the operation tool; and
a right wire configured to operably couple the right stand holding member to the operation tool,
wherein a position of the operation tool to which the left wire is coupled and a position of the operation tool to which the right wire is coupled can be changed and adjusted separately.

Assignees

• Kubota Kk

Inventors

• Boyd Robert Stewart

Classifications

• E02F3/961

  with several digging elements or tools mounted on one machine (for backhoes E02F3/964 takes precedence) · CPC title

• E02F3/42

  Drives for dippers, buckets, dipper-arms or bucket-arms · CPC title

• E02F3/40

  Dippers; Buckets {; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets (devices to connect tools to arms or booms E02F3/3604; teeth therefor E02F9/28)} · CPC title

• E02F3/401

  Buckets or forks comprising, for example, shock absorbers, supports or load striking scrapers to prevent overload · CPC title

• E02F3/36

  Component parts · CPC title