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Backhoe

A backhoe, left and right direction technology, applied in the field of backhoe, can solve the problems of short welding length, the two longitudinal ribs are not combined with each other, and it is difficult to improve the installation strength, so as to improve the mutual installation strength and reduce stress concentration. Effect

Inactive Publication Date: 2007-04-04
KUBOTA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the aforementioned prior art, the front ends of the left and right longitudinal ribs are welded to the left and right rear parts of the swing bearing component, and the welded length is short, which tends to cause stress concentration on the welded part. Moreover, the left and right longitudinal ribs are not bonded to each other, so it is difficult to improve their strength. Installation strength

Method used

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Embodiment Construction

[0038] Embodiments of the present invention will be described below based on the drawings.

[0039] In Fig. 1~Fig. 14, 1 refers to the backhoe (rotary working machine) of the rear small rotary type, including: the traveling device 2 of the lower part, the superstructure body 3 of the upper part, and the bulldozer installed in the front part of the traveling device 2 ( dozer) device 4, ground working device 5 installed on the superstructure 3.

[0040] The aforementioned traveling device 2 has crawler belt traveling mechanisms 7 on the left and right of a track frame (track frame) 6 and can be driven by a hydraulic motor. A turntable 10 serving as a base of the upper structure 3 is rotatably supported on a track frame 6 about a rotation center (vertical axis) X via a turn bearing 11 and is driven by a turn motor 8 provided on the turntable 10 . The bulldozer 4 is provided with blades on the front portion of the track frame 6 so as to be able to move up and down.

[0041] On t...

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PUM

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Abstract

An improvement is realized in mutual assembly strength between a swing bearing member and right and left longitudinal ribs, and welds are subjected to a reduced stress concentration. A backhoe comprises a swivel deck (10); a first longitudinal rib (19L) disposed on the swivel deck, the first longitudinal rib extending in a fore and aft direction, and having a front portion (19La) extending in a transverse direction; a second longitudinal rib (19R) disposed on said swivel deck, the second longitudinal rib extending in the fore and aft direction, and having a front end thereof connected to the front portion of the first longitudinal rib; and a swing bearing member (20) attached to a front surface of the front portion of the first longitudinal rib for supporting a ground working implement through a swing shaft.

Description

technical field [0001] The present invention relates to a backhoe having a ground working device at the front of a rotary table. Background technique [0002] In this prior art, a swing bearing member having left and right longitudinal ribs and a front end is provided on a turntable with a bifurcated support frame in plan view, and a pair of swing bearing members are supported via a swing shaft on the swing bearing member of the support frame. Ground working device, on the right side of the turntable, the operating oil tank and fuel tank are arranged, and the swing pressure cylinder of the swing ground working device is arranged on the lower side, and the engine and counterweight are arranged on the rear part of the turntable. (For example, refer to Japanese Patent Application Laid-Open No. 2005-232795). [0003] In the aforementioned prior art, the front ends of the left and right longitudinal ribs are welded to the left and right rear parts of the swing bearing component,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F9/00E02F3/36
CPCE02F9/0808
Inventor 三宅知明
Owner KUBOTA LTD
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