CN205689607U - A kind of powder metallurgy oil-impregnated bearing - Google Patents

Abstract

This utility model provides a kind of powder metallurgy oil-impregnated bearing, including bearing body, the axis of bearing body offers centre bore, being further opened with oil groove inside described bearing body, oil groove is spiral type, arranges around centre bore, described oil groove communicates with centre bore, and the inwall of described oil groove is equipped with screw thread.This utility model is little with the contact area of axle when assembling, and reduces the generation of frictional heat so that the oil that oiliness bearing includes is unlikely to deteriorate or volatilizees, and reduces abrasion loss；Further promote lubricant effect and bearing life, usefulness and the competitiveness of oiliness bearing are greatly improved.Oil pressure is beneficial to keep the uniform of fit-up gap, and operating noise is little.

Description

A kind of powder metallurgy oil-impregnated bearing

Technical field

This utility model relates to oiliness bearing and sintered metal product field, particularly relates to a kind of power metallurgical oil-retaining axle Hold.

Background technology

Powder metallurgy is as raw material with metal dust (or mixture of metal dust and non-metal powder), through shaping And sintering, manufacture various types of goods, be sintered metal product.Powder metallurgy oil-impregnated bearing i.e. with metal dust (or gold Belong to the mixture of powder and non-metal powder) as raw material, through shaping and sintering, the oiliness bearing being manufactured into.

Bearing (bearing) is used to support the parts of the tumblers such as auxiliary motor rotating shaft, does not has the auxiliary electricity of bearing The rotating shaft of motivation can be described as cannot rotating at all, it can be seen that the key player that bearing is played the part of.Common are ball bearing (ball bearing), consists predominantly of the lining of bearing holder (housing, cover) and the inner side being positioned at outside, has multiple ball in the middle of both, and In lining, tight fit has an axle center can rotate relative to bearing holder (housing, cover), and meanwhile, the part of ball contains the solid lubrications such as similar butter Agent, increases the lubricity of ball bearing.

Although ball bearing precision is at a relatively high, but, the high temperature caused during long-time use, can make to include The oil change of lubricant so that the lubricant around ball reduces and produces sizable noise, meanwhile, ball bearing cost At a relatively high, for the occasion widely applied, as fan, CD-ROM drive, digital multi CD-ROM drive (DVD-ROM) etc. are suitable Be not suitable for.The substitute is oiliness bearing (oil impregnated bearing or sleeve is bearing), price is about Only 1st/18th of ball bearing, oiliness bearing can be referred to as again self-lubricating bearing or without to oil bearing, mainly utilize ferrum system, The materials such as copper system, copper-iron alloy, rustless steel system, after continuous high temperature sintering (temperature is about at 760-1200 degree), recycle its capillary Hole oil storage principle, puts it in vacuum barrel, and in utilizing vacuum machine to detach part, pore hollow gas reinjects lubricating oil, typically In fact, oil content is about 18-25%, is mainly adjusted by tissue tight's degree.

The oiliness bearing of existing technology, during use, loads the center hole of oiliness bearing, axle center and oil-containing by axle center Bearing rough holding one space, when relatively rotating, in bearing, ground lubricating oil can be distributed between the two, it is provided that the effect of lubrication. Although oiliness bearing is with low cost, but, after using at a high speed, internal lubricating oil is easy to evaporate or cohere, and makes Lubricant effect is had a greatly reduced quality, and loses lubrication, and produces sizable noise, and the life-span also allowing for oiliness bearing subtracts significantly Low.

Utility model content

The purpose of this utility model is to provide a kind of powder metallurgy oil-impregnated bearing, to solve above-mentioned technical problem.

Technical problem to be solved in the utility model realizes by the following technical solutions:

A kind of powder metallurgy oil-impregnated bearing, it is characterised in that: include bearing body, during the axis of bearing body offers Central hole, is further opened with oil groove inside described bearing body, oil groove is spiral type, arranges around centre bore, described oil groove and center Hole communicates, and the inwall of described oil groove is equipped with screw thread.

The cross section of described centre bore and oil groove is circle, and the circumferential wall of described centre bore intersects with the inner ring surface of oil groove, And at intersection opening, make centre bore communicate with oil groove.To reduce the contact area of axle and center bore inner wall face, it is greatly decreased Contact force, the generation of frictional heat so that the oil that oiliness bearing includes is unlikely to deteriorate or volatilizees, reduce abrasion loss.

Described screw thread is arranged to thread groove, and the cross section of thread groove is arranged to V-type.Thread groove can be that lubricating oil provides Memory space, and the thread groove of one-level one-level can eliminate the pressure wave of lubricating oil, keeps stablizing of local oil pressure, is beneficial to Between axle and centre bore that holding coordinates with centre bore, fit-up gap stablizes.

The beneficial effects of the utility model are:

This utility model is little with the contact area of axle when assembling, and reduces the generation of frictional heat so that oiliness bearing includes Oil be unlikely to deteriorate or volatilize, reduce abrasion loss；Further promote lubricant effect and bearing life, be greatly improved and contain The usefulness of oil bearing and competitiveness.Oil pressure is beneficial to keep the uniform of fit-up gap, and operating noise is little.

Accompanying drawing explanation

Fig. 1 is schematic front view of the present utility model；

Fig. 2 is schematic side view of the present utility model.

Detailed description of the invention

For the technological means making this utility model realize, creation characteristic, reach purpose and be easy to understand with effect, under Face with specific embodiments and the drawings, is expanded on further this utility model, but following embodiment is only of the present utility model excellent Select embodiment, and not all.Based on the embodiment in embodiment, those skilled in the art are not making creative work Lower the obtained other embodiments of premise, broadly falls into protection domain of the present utility model.

Specific embodiment of the utility model is described below in conjunction with the accompanying drawings.

As shown in Figure 1 and Figure 2, a kind of powder metallurgy oil-impregnated bearing, including bearing body 2, the axis of bearing body 2 is opened Being provided with centre bore 1, bearing body 2 is internal is further opened with oil groove 3, and oil groove 3 be spiral type, arranges around centre bore 1, oil groove 3 and Centre bore 1 communicates, and the inwall of oil groove 3 is equipped with screw thread 4.

The cross section of centre bore 1 and oil groove 3 is circle, and the circumferential wall of centre bore 1 intersects with the inner ring surface of oil groove 3, and At intersection opening, centre bore 1 is made to communicate with oil groove 3；Screw thread 4 is arranged to thread groove, and the cross section of thread groove is arranged to V Type.

Of the present utility model ultimate principle, principal character and of the present utility model advantage have more than been shown and described.One's own profession Skilled person will appreciate that of industry, this utility model is not restricted to the described embodiments, described in above-described embodiment and description Be only preference of the present utility model, be not intended to limit this utility model, without departing from this utility model spirit and scope On the premise of, this utility model also has various changes and modifications, and these changes and improvements both fall within this claimed practicality In novel scope.This utility model claims scope and is defined by appending claims and equivalent thereof.

Claims (3)

1. a powder metallurgy oil-impregnated bearing, it is characterised in that: include bearing body, the axis of bearing body offers center Hole, is further opened with oil groove inside described bearing body, oil groove is spiral type, arranges around centre bore, described oil groove and centre bore Communicating, the inwall of described oil groove is equipped with screw thread.

Powder metallurgy oil-impregnated bearing the most according to claim 1, it is characterised in that: the cross section of described centre bore and oil groove is equal For circle, the circumferential wall of described centre bore intersects with the inner ring surface of oil groove, and at intersection opening, makes centre bore and oil groove phase Logical.

Powder metallurgy oil-impregnated bearing the most according to claim 1, it is characterised in that: described screw thread is arranged to thread groove, The cross section of thread groove is arranged to V-type.