Lead-free self-lubricating bearing and its production

Abstract

The invention relates to a mechanical components industry regulation hole coaxial between the methodology and regulation components, in particular the aviation, aerospace, civil and other mechanical structure of the multi-hinge assembly point. Double eccentric bushing from the eccentric bushing and the eccentric bushing composition, the eccentric bushing diameter and the outer diameter of a round circle of eccentric and the eccentric bushing diameter and the outer diameter of a round of the same circle of eccentric, and, Bushing end of the shaft is the first shoulder. Double eccentric bushing used in the eccentric bushing and the eccentric bushing with a certain amount of tolerance, through the inner and outer sleeve of repeated eccentric rotation adjustment can be realized coaxial connection points more than the match, and for each hub Heart of the biggest angle adjustment of not more than 360 degrees, adjust volume small. This greatly reduces the difficulty of assembling and because of the internal and external sleeve with tolerance, as well as components and assembly hub between the matching hole in the machining tolerances can be very good at that in the assembly, so there is no need to conduct a follow-up processing, reducing assembly time.

Description

technical field [0001] The invention relates to a sliding bearing, in particular to a lead-free self-lubricating bearing made of three-layer composite material. Background technique [0002] The DU bearing that came out as early as the 1970s is such a three-layer composite bearing, but because its friction layer lining layer is made of polytetrafluoroethylene (PTFE) and lead (P b ) mixture, although it can replace copper alloy bushings in some application fields and achieve the purpose of reducing costs and improving service life, but because it contains metallic lead in the bearing friction layer, this lead element and lead The compound is a toxic substance. Because the bearing will cause abrasive wear during work, lead-containing powder and lead gas escape at high temperature, and the recycling of waste bearings will bring harm to the human body and the environment. With people's awareness of environmental protection The use of this product in machinery manufacturing indu...

AI Technical Summary

Problems solved by technology

[0005] Polytetrafluoroethylene, referred to as PTFE, has excellent friction properties, and its friction coefficient is the smallest among plastics. It is often used as a lubricating material for sliding bearing linings and can be used as a filler for its low friction coefficient, but if it is used alone, then The mechanical strength and elastic modulus are extremely poor, so there are not many opportunities to use PTFE alone

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