US 10,876,271 B2Granted

Attaching-detaching structure of a front loader, front loader and work vehicle

AssigneeKubota Corporation

InventorsShin Torii, Yuta Ozeki

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Abstract

An attaching-detaching structure of a front loader that can make the attaching and detaching work to a vehicle body easier, a front loader, and a work vehicle. The attaching-detaching structure of a front loader is provided with a thumb which, on a sub-frame that supports a boom, is supported so as to be able to move between an engagement position for engaging with a main frame provided on a vehicle body and a release position at which engagement with the main frame is released, and which is biased in the release direction toward the release position from the engagement position; and a lock bar which, on the sub-frame, is supported so as to be able to move between a regulated position for regulating movement of the thumb in the release direction from the engagement position, and a regulation release position that allows the thumb to move to the release position.

Claims18

Dependent claims

A readily attachable and detachable structure of a front loader, comprising:

an engaging member which is supported on a sub-frame for supporting a boom so as to be able to move between an engagement position for engaging with a main frame provided on a vehicle body and a release position at which engagement with the main frame is released, and which is biased in a release direction facing the release position from the engagement position;
a regulating member which is supported on the sub-frame so as to be able to move between a regulated position for regulating the movement of the engaging member to the release direction from the engagement position, and a regulation release position that allows the engaging member to move to the release position;
and
a retention mechanism for retaining the regulating member at the regulated position and the regulation release position, wherein:
the regulating member is biased in a regulated direction facing the regulated position from the regulation release position,
when the engaging member moves facing the engagement position from the release position, follows the engaging member and moves in the regulated direction from the regulation release position,
the engaging member is formed so as, when the main frame moves relatively to approach the sub-frame, to be pressed by the main frame, and move toward the engagement position from the release position,
the retention mechanism comprises a detent mechanism which locks the regulating member at an intermediate position between the regulated position and the regulation release position so as not to move in the regulated direction, and
the engaging member, in a state for which the regulating member is locked at the intermediate position by the detent mechanism, when moved in the release direction, presses the regulating member to be moved to the regulation release position.

6 more elements

A readily attachable and detachable structure of a front loader comprising:

an engaging member which is supported on a sub-frame for supporting a boom so as to be able to move between an engagement position for engaging with a main frame provided on a vehicle body and a release position at which engagement with the main frame is released, and which is biased in a release direction facing the release position from the engagement position;
and
a regulating member which is supported on the sub-frame so as to be able to move between a regulated position for regulating the movement of the engaging member to the release direction from the engagement position, and a regulation release position that allows the engaging member to move to the release position, wherein:
the engaging member is formed so as to be supported on the sub-frame to be able to swing between the engagement position and the release position,
the regulating member is formed so as to be supported on the sub-frame to be able to swing between the regulated position and the regulation release position,
a swing shaft of the engaging member is provided so as to be parallel with a swing shaft of the regulating member,
an abutting part of the regulating member and the engaging member is formed in an arc shape with the swing shaft of the regulating member as the center in the swing axis line direction view of the regulating member, and
an abutting part of the engaging member and the regulating member is formed in an arc shape for which the radius of curvature is approximately the same radius of curvature as that of the abutting part of the regulating member and the engaging member in the swing axis line direction view of the engaging member.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/975,104Filed 9 May 2018
Priority: JP 2017-9447411 May 2017
Published: US 2018/0327998 A115 Nov 2018
Granted: 29 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

E02F 3/627
Mechanically-driven: devices to connect beams or arms to tractors or similar self-propelled machines, e.g. drives therefor
B62D 49/02
Tractors: modified to take lifting devices
E02F 3/34
With digging tools mounted on a dipper- or bucket-arm , i.e. there is either one arm or a pair of arms, e.g. dippers, buckets: with bucket-arms ,…
A01D 87/0076
Mounted on the tractor but having their own lifting device: front loaders