CN86202089U

CN86202089U - Electric axis with easy adjusting play of bearing

Info

Publication number: CN86202089U
Application number: CN 86202089
Authority: CN
Inventors: 孙宝兴
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-03-31
Filing date: 1986-03-31
Publication date: 1987-02-04

Abstract

The utility model relates to an electric main shaft with a new structure, which can adjust bearing play easily. Being a new supporting structure of a shaft, the utility model is especially suitable for various electric main shafts and belt shafts which need adjusting the play of rolling bearings. The utility model is characterized in that two groups of supporting main shafts are adopted; each group of the supporting main shaft is provided with three sets of rolling bearings; through calculating and pre-adding axial load, the amount of compression of a spring can be determined by the bearing play to control relative displacement of the inner and the outer rings of the bearing. After being assembled once, the utility model can adjust the bearing play automatically. Compared with the existing electric main shaft with a common structure, the utility model enhances the service life about 10 times; the utility model can be installed and repaired by ordinary skilled workers.

Description

Electric axis with easy adjusting play of bearing

The present invention is an a kind of supporting new structure, is particularly suitable for various electric main shaft and the belt shafts that need allotment rolling bearing play.

The bistrique that electricity main shaft or belt shaft are formed is the main working parts of general grinding machine, and its performance quality directly influences the precision of operative workpiece.

Its front and back supporting of the electric main shaft of grinding machine use is both at home and abroad at present all adopted two groups, the supporting form of every group two cover.Reasonably the play of the every cover bearing of allotment will improve life-span, running accuracy and the rigidity of electric main shaft.The height dimension of the inner outer back-up ring of play allotment of at present general every group of bearing of electric main shaft is controlled, because its play size of bearing of model of the same race is incomplete same, when the electric main shaft of assembling, often need the height dimension of the inside and outside back-up ring of reconditioning or the bearing that some is joined in examination, by rule of thumb, hand touches to rotate and allocates, and makes the repairing of main shaft and assembling very inconvenient like this.

The objective of the invention is to design a kind of new spindle support structure, thereby do not need to match by cover by hand the play of every group of bearing, after electric spindle mounted finished, the just automatic allotment of the play of block bearing was come out.

Principle of the present invention is to add axial load in advance by calculating, thereby the decrement of determining spring is after electric mainshaft gland is loaded onto, because the relative displacement between the inside and outside circle of the effect of spring control bearing reaches the purpose of allocating bearing clearance.

Accompanying drawing 1 is present general electric main shaft supporting form schematic representation.

One group of (two covers) bearing 3 is loaded onto at axle 2 two respectively, inner shield ring 8 and outer back-up ring 9 are housed respectively between every group of bearing, the end face of inner shield ring 8 is against on the inner ring end face of bearing, make the inner ring axially locating of two bearings, the end face of outer back-up ring 9 props up the bearing outer ring end face, limit the axial displacement of the inside and outside circle of bearing by the height dimension difference of the inside and outside back-up ring of reconditioning, reach the purpose of allotment bearing clearance.The 4th, be contained in the rotor coil on the axle 2, the 5th, be contained in the stator coil on the axle housing, the 6th, be contained in the equilibrium block on the axle 2, the 1st, be contained in the gland on the axle housing, nut 7 screws, and axle 2 axially moves to right and pulls out bearing clearance.

Accompanying drawing 2 is electric main shaft supporting form schematic representation of the present invention.

Equilibrium block 6, rotor coil 4 are installed on the axle 2, and the 5th, be contained in the stator coil on the axle housing.Compared to Figure 1 do not exist together be the axle 2 two supporting respectively by three the cover bearings form, near two cover bearing inner rings of rotor coil by inner shield ring 8 locations spaced that are installed on the axle 2, between middle bearing and the outboard bearing by being contained in elastic mechanism on the axle 2 with its bearing outer ring locations spaced.Elastic mechanism is made up of outer back-up ring 11, spring 10 and spring nest seat ring 9, the uniform even number spring of spring nest seat ring end face nest, 10 1 on spring supports into spring nest, the other end is pressed on the end face of outer back-up ring 11, determine the decrement of spring through the calculating that adds axial load in advance, after gland 1 compressed, elastic mechanism made bearing outer ring axial displacement, automatically mix the play of bearing, nut 7 screws axle 2 and axially moves to right and pull out bearing clearance.

Show through practice, the electric main shaft of this new structure, assembling and repair very conveniently, average skilled worker once just can be finished main shaft installation, do not need the inside and outside back-up ring of repeatedly reconditioning, or examination joins many cover bearings, and every cover shaft strength equilibrium in the supporting has improved the rigidity of electric main shaft, compare with the electric main shaft of original structure, improved working life about 10 times.This supporting structure equally also is suitable for the belt main shaft.

Claims

A kind of new structure electricity main shaft, by rotary main shaft, be contained in the rotor coil equilibrium block on the rotary main shaft, block bearing, electricity main shaft shell, critical pieces such as stator coil constitute, and it is characterized in that: block bearing has two groups, every group three cover, be contained in main shaft two respectively, locate spring nest seat ring 9 end face garden Zhou Junbu even number spring nests by inner shield ring 8 near the inboard bearing of rotor and the inner ring of intermediate bearing, spring 10 1 ends support in the spring nest, the other end is pressed on the end face of outer back-up ring 11, by spring nest seat ring 9, and the elastic mechanism that spring 10 and outer back-up ring 11 are formed, between intermediate bearing and outboard bearing, its both sides end face is pressed on the end face of bearing outer ring.