CN211501314U

CN211501314U - Outer ring flange double-row angular contact ball bearing for grating angle encoder

Info

Publication number: CN211501314U
Application number: CN201922267586.9U
Authority: CN
Inventors: 邹小洛; 刘凯; 袁星辉; 李俊强; 李小会
Original assignee: Luoyang Huigong Bearing Technology Co ltd
Current assignee: Luoyang Huigong Bearing Technology Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-09-15
Anticipated expiration: 2029-12-17

Abstract

An outer ring flange double-row angular contact ball bearing for a grating angle encoder comprises an inner ring, double-row balls, a retainer and an outer ring, wherein double-row track surfaces are arranged on the periphery of the inner ring; the outer ring comprises a flange outer ring and a matching outer ring, and inner track surfaces are arranged on the inner peripheries of the flange outer ring and the matching outer ring; the inner track surface comprises a tangent arc surface and a tangent cylindrical surface, wherein the cylindrical surfaces of the flange outer ring and the matching outer ring are oppositely arranged, and the flange outer ring and the matching outer ring are connected through a bolt. Because the outer ring is formed by connecting the flange outer ring and the matched outer ring, the clearance can be controlled within a reasonable range by continuously grinding the flange outer ring or matching the inner side end surface of the outer ring. The utility model discloses reduced the machining precision and to the high requirement of processing equipment, technology, can use existing equipment, technology to reach the high accuracy requirement, made spin and the play control of interior outer lane at reasonable within range. Additionally, the utility model discloses can reduce the damage that equipment friction brought biserial ball, inner circle, outer lane.

Description

Outer ring flange double-row angular contact ball bearing for grating angle encoder

Technical Field

The utility model belongs to the technical field of the bearing technique and specifically relates to a grating angle encoder is with outer lane flange biserial angular contact ball bearing is related to.

Background

The accuracy of the grating angle encoder plays a crucial role in the performance of the system. The shaft angle position accuracy depends on the bearing angular pendulum accuracy, and the bearing accuracy used on the high-precision grating angle encoder needs to reach over P2 level. Due to the influence of the bearing precision produced in China, the grating angle encoder (the angular pendulum is less than or equal to 5 ') produced in China at present can only meet the requirements of low-end markets, the requirements of a large number of grating encoders (the angular pendulum is less than or equal to 2.5') used in high-end markets are required to be imported, and the main import of the grating angle encoder is the first-class grating angle encoder RCN2000 in Germany, Heidenhain and International. With the continuous development of national economy, the demand of high-precision grating angle encoders in high-end markets is increasing, the grating angle encoders are used for replacing import, Germany Haidenhain grating angle encoders, and the grating angle encoders are the trend that the bearing industry of China and the future need to solve and develop.

The bearing used by the existing grating angle encoder is an outer ring flange double-row angular contact ball bearing, and the key technical problem to be solved is how to design a shafting of the high-precision outer ring flange double-row angular contact ball bearing, so that the shafting has no jamming and jerking (uneven friction resistance) when rotating, the starting torque is less than or equal to 0.05Nm, the angular pendulum is less than or equal to 1.5 percent, and the requirement of the high-precision grating angle encoder is met. The core technical difficulty is how to reasonably control the clearance between the rolling ball and the inner ring and the outer ring, and the starting torque can be increased when the clearance is too small; the angular pendulum will exceed the standard if the clearance is too large. The size of the clearance depends on the processing precision of the inner and outer ring tracks, and the overhigh processing precision has high requirements on processing equipment and processes and is difficult to achieve.

SUMMERY OF THE UTILITY MODEL

In order to overcome not enough among the background art, the utility model discloses a grating angle encoder is with outer lane flange biserial angular contact ball bearing, its aim at: the high requirements of the processing precision on processing equipment and technology are reduced, and the clearance between the rolling ball and the inner and outer rings is controlled within a reasonable range.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

an outer ring flange double-row angular contact ball bearing for a grating angle encoder comprises an inner ring, double-row balls, a retainer and an outer ring, wherein double-row track surfaces are arranged on the periphery of the inner ring; the outer ring comprises a flange outer ring and a matching outer ring, and inner track surfaces are arranged on the inner peripheries of the flange outer ring and the matching outer ring; the inner track surface comprises a tangent arc surface and a tangent cylindrical surface, wherein the cylindrical surfaces of the flange outer ring and the matched outer ring are oppositely arranged, and the flange outer ring and the matched outer ring are connected through a bolt.

According to the technical scheme, the flange outer ring is provided with a plurality of countersunk bolt holes, the matched outer ring is provided with threaded holes corresponding to the countersunk bolt holes, and the flange outer ring and the matched outer ring are connected through the hexagon socket head cap screws.

According to the technical scheme, the flange outer ring is provided with a plurality of countersunk bolt holes, the flange outer ring is provided with threaded holes corresponding to the countersunk bolt holes, and the flange outer ring and the matched outer ring are connected through the hexagon socket head cap screws.

The technical scheme is further improved, and a plurality of axial positioning bolt holes are formed in the flange of the flange outer ring.

The technical scheme is further improved, sealing elements used for sealing double rows of balls are arranged on the flange outer ring and the matched outer ring, and the sealing elements are non-contact framework rubber sealing structures.

Further improve technical scheme, the material of flange outer lane, cooperation outer lane, inner circle is the stainless steel, and the material of biserial ball is pottery.

Owing to adopt above-mentioned technical scheme, compare the background art, the utility model discloses following beneficial effect has:

because the outer ring is formed by connecting the flange outer ring and the matched outer ring, the clearance between the double-row balls and the inner ring and the clearance between the double-row balls and the outer ring can be controlled within a reasonable range by continuously grinding the flange outer ring or matching the inner side end surface of the outer ring on the premise that the processing size of the double-row track surface of the inner ring is not changed. The structure is also beneficial to the assembly of the bearing, and reduces the damage of assembly friction to the double-row balls, the inner ring and the outer ring.

The utility model discloses reduced the high requirement of machining precision to processing equipment, technology, can use existing equipment, technology to reach the high accuracy requirement, made spin and the play control of interior outer lane in reasonable within range, satisfied the high standard requirement of high accuracy grating angle encoder.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. an inner ring; 2. double-row balls; 3. an outer ring; 31. a flange outer ring; 32. matching the outer ring; 4. a hexagon socket head cap screw; 5. and a seal.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

An outer ring flange double row angular contact ball bearing for a grating angle encoder comprises an inner ring 1, double row balls 2, a retainer and an outer ring 3, wherein a double row track surface is arranged on the periphery of the inner ring 1, as shown in figure 1. Because the outer ring 3 can be installed in a split way, the track surface of the inner ring 1 can only be an arc surface.

The outer ring 3 comprises a flange outer ring 31 and a matching outer ring 32, and a plurality of axial positioning bolt holes are formed in a flange of the flange outer ring 31 and used for achieving shaft surface installation of the bearing. Inner track surfaces are arranged on the inner peripheries of the flange outer ring 31 and the matching outer ring 32; the inner orbital plane comprises a tangent arc surface and a tangent cylindrical surface, wherein the cylindrical surfaces of the flange outer ring 31 and the matching outer ring 32 are oppositely arranged. The double-row balls 2 are all contacted with the outer ring 3 by the inner ring 1 which inclines outwards, so that the bearing can bear axial and radial force. The arc surface is tangent to the cylindrical surface, and the cylindrical surfaces of the flange outer ring 31 and the matching outer ring 32 are arranged oppositely, so that the double-row balls 2 can be conveniently assembled with the flange outer ring 31 and the matching outer ring 32 without damage.

The flange outer ring 31 and the matching outer ring 32 are connected through bolts, specifically, the flange outer ring 31 is provided with six countersunk bolt holes, the matching outer ring 32 is provided with threaded holes corresponding to the countersunk bolt holes, and the flange outer ring 31 and the matching outer ring 32 are connected through six hexagon socket head cap screws 4. According to the use requirement, the size, the number and the locking torque of the inner hexagonal cylindrical bolts 4 are reasonably selected, so that the connection deformation can be reduced, the size precision of the working surfaces of the inner ring and the outer ring is improved, and the rotation unevenness is reduced.

Because the outer ring 3 is formed by connecting the flange outer ring 31 and the matching outer ring 32, the clearance between the double-row balls 2 and the inner ring 1 and the outer ring 3 can be controlled within a reasonable range by continuously grinding the inner side end surface of the flange outer ring 31 or the matching outer ring 32 on the premise that the processing size of the double-row track surface of the inner ring 1 is not changed. The structure is also beneficial to the assembly of the bearing, and reduces the damage of assembly friction to the double-row balls 2, the inner ring 1 and the outer ring 3.

In order to seal the rolling bodies, the sealing elements 5 for sealing the double-row balls 2 are arranged on the flange outer ring 31 and the matching outer ring 32, and the sealing elements 5 are of non-contact type framework rubber sealing structures, so that friction can be reduced, and assembly is facilitated.

In order to reduce the contact friction, the flange outer ring 31, the mating outer ring 32 and the inner ring 1 are made of stainless steel, the double row balls 2 are made of ceramic, and grease with low friction resistance and low volatility is selected to reduce the rolling friction.

After the measure above the adoption, the utility model discloses do not have card when rotatory and hinder, the jerk, start-up moment is less than or equal to 0.05Nm, and the angle pendulum is less than or equal to 1.5 ", has satisfied the high standard requirement of high accuracy grating angle encoder.

The part of the utility model not detailed is prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An outer ring flange double-row angular contact ball bearing for a grating angle encoder comprises an inner ring (1), double-row balls (2), a retainer and an outer ring (3), wherein a double-row track surface is arranged on the periphery of the inner ring (1); the method is characterized in that: the outer ring (3) comprises a flange outer ring (31) and a matching outer ring (32), and inner track surfaces are arranged on the inner peripheries of the flange outer ring (31) and the matching outer ring (32); the inner track surface comprises a tangent arc surface and a tangent cylindrical surface, wherein the cylindrical surfaces of the flange outer ring (31) and the matching outer ring (32) are oppositely arranged, and the flange outer ring (31) and the matching outer ring (32) are connected through a bolt.

2. The outer ring flange double row angular contact ball bearing for the grating angle encoder as claimed in claim 1, wherein: the flange outer ring (31) is provided with a plurality of countersunk bolt holes, the matching outer ring (32) is provided with threaded holes corresponding to the countersunk bolt holes, and the flange outer ring (31) and the matching outer ring (32) are connected through the inner hexagonal cylindrical bolts (4).

3. The outer ring flange double row angular contact ball bearing for the grating angle encoder as claimed in claim 1, wherein: the flange outer ring (31) is provided with threaded holes corresponding to the countersunk bolt holes, and the flange outer ring (31) and the matching outer ring (32) are connected through the hexagon socket head cap screw (4).

4. The outer ring flange double row angular contact ball bearing for the grating angle encoder as claimed in claim 1, wherein: the flange of the flange outer ring (31) is provided with a plurality of axial positioning bolt holes.

5. The outer ring flange double row angular contact ball bearing for the grating angle encoder as claimed in claim 1, wherein: and sealing elements (5) for sealing the double-row balls (2) are arranged on the flange outer ring (31) and the matching outer ring (32), and the sealing elements (5) are non-contact framework rubber sealing structures.

6. The outer ring flange double row angular contact ball bearing for the grating angle encoder as claimed in claim 1, wherein: the flange outer ring (31), the matching outer ring (32) and the inner ring (1) are made of stainless steel, and the double-row balls (2) are made of ceramic.