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Bucket tooth installation structure convenient for rapid disassembly and assembly

A technology for installing structures and bucket teeth, which is applied in earth movers/excavators, construction, etc., can solve the problems of small radial expansion force, wear failure, etc., and achieve the effects of large lateral rigidity, long life and reliable connection

Inactive Publication Date: 2012-04-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This solution is easy to install and disassemble because of the thread structure, but the radial expansion force provided by the elastic member is small, and it is easy to wear and fail

Method used

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  • Bucket tooth installation structure convenient for rapid disassembly and assembly
  • Bucket tooth installation structure convenient for rapid disassembly and assembly
  • Bucket tooth installation structure convenient for rapid disassembly and assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 As shown, the present invention includes a bucket tooth 1, a tooth holder 2 and a pin assembly 3; wherein the bucket tooth 1 has a bucket tooth chamber 11, and the front part of the tooth holder 2 has a tooth holder head 21, and the bucket tooth chamber 11 and the tooth holder head 21 The shapes are complementary, the tooth seat head 21 is accommodated in the bucket tooth cavity 11, the bucket tooth 1 and the tooth seat head 21 are fixedly connected by the pin assembly 3; The coaxial hole in the center plane of bucket tooth 1, wherein the inner hole 13 of the tooth cavity on both sides is smaller than the outer hole 12 of the tooth cavity, and the inner hole 13 of the tooth cavity on both sides and the outer hole 12 of the tooth cavity respectively form an annular concave platform; The pin assembly 3 includes a pin 4 and a memory alloy expansion ring 5; one end of the pin 41 of the pin 4 has a pin cap 4...

Embodiment 2

[0035] Such as Figure 6 Shown is an axial center sectional view of the pin assembly in Embodiment 2 of the present invention. and Example 1 image 3 In comparison, an annular groove 43 is provided at the end of the pin 41 of the pin 4 . At high temperature (that is, the temperature is higher than the transition temperature of the memory alloy material), the inner diameter of the memory alloy expansion and contraction ring 5 expands to be larger than the diameter of the end of the pin 4 pin 41, which can be easily installed and disassembled; at normal temperature, the memory alloy expands and contracts The inner diameter of the ring 5 is reduced and tightens around the annular groove 43 . Except for this, Example 2 is the same as Example 1.

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Abstract

The invention discloses a bucket tooth installation structure convenient for rapid disassembly and assembly. The bucket tooth installation structure comprises a bucket tooth, a tooth seat and a pin assembly, wherein the bucket tooth is internally provided with a bucket tooth cavity, the front part of the tooth seat is provided with a tooth seat head, the bucket tooth cavity is complementary with the tooth seat head in shape, and the bucket tooth is fixedly connected with the tooth seat head through the pin assembly; the left side wall and the right side wall of the big end of the bucket toothcavity are symmetrically provided with coaxial holes in a mirroring way, wherein the coaxial holes are vertical to the central surface of the bucket tooth, and an inner hole and an outer hole of the bucket tooth cavity form an annular concave table; one end of a pin in the pin assembly is provided with a pin cap, the pin cap is arranged in the annular concave table at one side of the bucket tooth, and a memory alloy expanding and contracting ring is arranged outside the other end of the pin and arranged in the annular concave table at the other side of the bucket tooth; or the other end of the pin is provided with an annular groove, and the memory alloy expanding and contacting ring is arranged in the annular groove and arranged in the annular concave table at the other side of the buckettooth. According to the invention, the pin assembly provided with the memory alloy expanding and contracting ring is adopted, rapid assembly and disassembly of the bucket teeth are realized by electrodes or flame heating, and the pin assembly has large transverse rigidity, provides large fastening force and is reliable to connect.

Description

technical field [0001] The invention relates to construction machinery, in particular to a bucket tooth installation structure which is convenient for quick disassembly and assembly. Background technique [0002] At present, the common excavator bucket tooth installation structure in the market is: the tooth pin with the expansion spring is used to penetrate the bucket tooth and the tooth seat and be fixed. Since the expansion spring and the mounting hole are interference fit, special power equipment is required to assist. The installation and removal of bucket teeth is laborious and complicated. [0003] In the invention patent application publication number US 2010 / 0257759 A1, a bucket tooth installation structure that is easy to disassemble is provided. A connection unit consisting of a pin and an intermediate compression spring. The outer diameter of the end pin is smaller than the inner diameter of the tooth cavity installation hole and larger than its outer diameter. ...

Claims

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Application Information

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IPC IPC(8): E02F9/28
Inventor 冯培恩曾令斌邱清盈
Owner ZHEJIANG UNIV
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