CN103398109A

CN103398109A - Bearing retreating device

Info

Publication number: CN103398109A
Application number: CN201310354502XA
Authority: CN
Inventors: 戚小龙; 杨夏沙; 龙云峰; 卢明明; 王山; 梅涛
Original assignee: CSR Zhuzhou Electric Co Ltd
Current assignee: CRRC Zhuzhou Electric Co Ltd
Priority date: 2013-08-15
Filing date: 2013-08-15
Publication date: 2013-11-20
Anticipated expiration: 2033-08-15
Also published as: CN103398109B

Abstract

The invention relates to a bearing retreating device and particularly relates to a bearing retreating device which is simple in structure, simple, easy and convenient to operate and capable of greatly increasing the operation efficiency and is particularly applied to the field of overhaul of traction motors. The device is composed of six parts: a pull rod, a bottom plate, a press plate, clamping plates, locating sleeves and thickened gaskets, wherein the pull rod enters into a gap of a bearing firstly, the rear of the pull rod is fixed through the pressing plate, and thus, an integrated tool for pulling and drawing the bearing is formed. Due to the adoption of the structural design, the defect that a common pulling and drawing tool cannot extend to the other end of the bearing is overcome; the device can easily extend into the narrow gap arranged between the bearing and an oil seal; the bearing is not damaged after the head of the pull rod hooks the inner ring of the bearing; a tensile force is provided by a manual hydraulic pump and acted on the pull rod to pressurize the manual hydraulic pump, and then, the bearing can retreat slowly along with the pull rod when the pressure is up to a certain value.

Description

A kind of bearing extractor

Technical field

This device, for the machine maintenance field, is used in particular for the dismounting of bearing of motor.

Background technique

At electric locomotive traction motor, manufacture field, directly affect the working life of motor the working life of bearing, and it is a lot of to affect the factor in working life of bearing, have directly, as the manufacturing process of bearing, material etc., also have indirectly, as the maintenance of bearing, the lubricating status of bearing etc.Electric locomotive traction motor needs regular overhauling, and the motor-driven step bearing need exit and check cleaning. YQ-1633what traction motor N step bearing adopted is the integral cage bearing, bearing inner race belongs to Spielpassung with coordinating of rotating shaft, bearing is not in the situation that need other device generally can exit smoothly, but after motor has moved certain distance with electric locomotive, between bearing inner race and rotating shaft, there is certain probability to have certain magnitude of interference, can't manually exit bearing this moment, must be by the bearing extractor of special use, because the gap between bearing and inner oil seal is less, brought certain difficulty for exiting of bearing, moreover, bearing is the higher parts of required precision, in moving back the process of bearing, retainer can not have any damage or deformation.By bearing extractor of the present invention, solve YQ-1633 motor N step bearing fully and exited difficult problem, guaranteed that simultaneously bearing exits in process, does not damage retainer.

Description

The present invention, in order to solve the problems of the technologies described above, provides a kind of bearing extractor,

A kind of bearing extractor, comprise: pull bar, circular bottom plate, semicircle clamp and hex head bolt, pull bar is fixed on the center of circular bottom plate, and the semicircle clamp is symmetrically arranged with U-shaped hole, with the tapped hole on hex head bolt and base plate, coordinate, the clamp edge is no more than the circular bottom plate edge.

Further, the bearing extractor also comprises: step-like setting sleeve with holes, pressing plate with holes, and setting sleeve is by drag link sleeve on clamp, and pressing plate is pressed on bearing cap by pull bar.

According to actual demand base plate and pull bar, be together by a threaded connection, also can be by being welded together.

This device provides pulling force by hydraulic hand-pump, and pulling force acts on bearing inner race by pull bar, and pull bar, because resiliently deformable can occur pulling force, acts on bearing inner race, and to the hydraulic hand-pump pressurization, bearing can exit rotating shaft together along with pull bar.

1. rod head structure: can put in easily the narrow and small gap between bearing and oil sealing, and rod head does not damage bearing after catching on bearing inner race.

2. protect whole tool structure: pull bar first enters by the gap of bearing, so after pull bar pierced into bearing play, the pull bar rear portion was fixed by pressing plate, forms the frock of an all-in-one-piece drawing bearing, in the process of stretching, protects bearing bracket stand.

This structural design has solved the difficult point that common drawing frock can't be goed deep into the bearing the other end.

The accompanying drawing explanation

The plan view of Fig. 1 integral cage bearing extractor

The parts 1-5 erection drawing of Fig. 2 integral cage bearing extractor

Fig. 3 assembles left view

Fig. 4 parts 6 plan views

Fig. 5 integral installation figure

1, pull bar 2, base plate 3, clamp 4, hex head bolt 5, setting sleeve 6, pressing plate

Embodiment

When using this device, first base plate 2 and pull bar 1 are linked together by tapped hole, two clamps 3 are fixed on base plate 2 by two hex head bolts 4, and two clamp 3 edges are no more than base plate 2 edges, with hex head bolt 4 bands, tightly get final product.The above parts that assemble are passed to brearing bore, unclamp two hex head bolts 4, two clamps 3 that slide in U-shaped hole, insert its edge in the gap between bearing roller and bearing cap, is close to after roller two hex head bolts 4 are fastening.Step-like setting sleeve 5 with holes is passed to pull bar and push down bearing housing on clamp 3, pressing plate 6 with holes is pressed on bearing cap by pull bar 1, forms complete bearing extractor.

Claims

1. bearing extractor, it is characterized in that: described bearing extractor comprises: pull bar (1), circular bottom plate (2), semicircle clamp (3) and hex head bolt (4), described pull bar (1) is fixed on the center of circular bottom plate (2), semicircle clamp (3) is symmetrically arranged with U-shaped hole and coordinates with the tapped hole that hex head bolt (4) and base plate are provided with, and described clamp (3) edge is no more than described circular bottom plate (2) edge.

2. bearing extractor according to claim 1, described bearing extractor also comprises: step-like setting sleeve with holes (5), pressing plate with holes (6), it is upper that described setting sleeve (5) is enclosed within clamp (3) by pull bar (1), and pressing plate (6) is pressed on bearing cap by pull bar.

3. bearing extractor according to claim 1, described circular bottom plate (2) edge is step-like.

4. bearing extractor according to claim 1 and 2, described base plate (2) and pull bar (1) are together by a threaded connection, also can be by being welded together.