Bucket and working vehicle provided with the same

Patent metadata

Field	Value
Publication number	US-9732494-B2
Application number	US-201514894098-A
Country	US
Kind code	B2
Filing date	Jul 15, 2015
Priority date	Jul 15, 2015
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

A bucket with a linear lower front edge includes: a first straight portion horizontally extending from the lower front edge toward an innermost of the bucket; an inclined portion continuous with a rear edge of the first straight portion, the inclined portion further extending toward the innermost of the bucket while being inclined upward; a curve continuous with a rear edge of the inclined portion at a lower edge of the curve, the curve having a predetermined bucket radius; a second straight portion continuous with an upper edge of the curve, the second straight portion being inclined upward toward a bucket opening; and a third straight portion bent at a bent portion toward the bucket opening relative to a front edge of the second straight portion, the third straight portion further extending toward the bucket opening.

First claim

The invention claimed is:

1. A working equipment for a loader, the working equipment comprising:
a bucket; and
a boom having a first end pivotally coupled to a vehicle body frame of the loader and a second end pivotally coupled to the bucket,
the bucket including:
a linear lower front edge,
a first straight portion horizontally extending from the lower front edge toward an innermost of the bucket,
an inclined portion continuous with a rear edge of the first straight portion, the inclined portion further extending toward the innermost of the bucket while being inclined upward,
a curve continuous with a rear edge of the inclined portion at a lower edge of the curve, the curve having a predetermined bucket radius,
a second straight portion continuous with an upper edge of the curve, the second straight portion being inclined upward toward an opening of the bucket,
a third straight portion bent at a bent portion toward the opening relative to a front edge of the second straight portion, the third straight portion further extending toward the opening, and
a stop positioned at a back surface of the second straight portion,
wherein the second straight portion is positioned opposite to the boom to thereby minimize a distance between the bucket and the boom at the bent portion when the bucket is tilted with the opening facing upward, and
wherein the stop is positioned opposite to the boom and is configured to be brought into contact with the boom when the bucket is tilted with the opening facing upward.

2. The working equipment according to claim 1 , wherein the first straight portion comprises a plate-shaped attachment portion defining the lower front edge and a plate-shaped bottom continuous with a rear edge of the plate-shaped attachment portion.

3. The working equipment according to claim 1 , wherein an angle between the inclined portion and the first straight portion is four degrees or more.

4. The working equipment according to claim 1 , wherein a ratio of a horizontal length of the first straight portion to a horizontal length from the lower front edge to a most-projecting position of the curve toward the innermost of the bucket is in a range from 0.3 to 0.5.

5. The working equipment according to claim 1 , wherein an upper exterior surface of the bucket is provided with a reinforcing member for reinforcing the upper exterior surface, and wherein the bent portion is positioned closer to the innermost of the bucket than it is to the reinforcing member.

6. A loader comprising the working equipment according to claim 1 .

7. The working equipment according to claim 1 , wherein the position of the stop is determined based on a moment of the boom that supports the bucket via the stop.

8. The working equipment according to claim 1 , wherein the first straight portion consists of a plate-shaped attachment portion.

Assignees

• Komatsu Mfg Co Ltd

Inventors

• Honda Toshimitsu
• Ohta Toshiyuki
• Wada Minoru
• Tsutsumi Katsuhiro
• Kobayashi Takaya

Classifications

• E02F3/40 Primary

  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