CN209781474U

CN209781474U - Radial retainer of three-row cylindrical roller variable pitch bearing

Info

Publication number: CN209781474U
Application number: CN201920387836.XU
Authority: CN
Inventors: 张峰
Original assignee: Luoyang Xinqianglian Rotary Bearing Co Ltd
Current assignee: Luoyang Xinqianglian Rotary Bearing Co Ltd
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2019-12-13
Anticipated expiration: 2029-03-26

Abstract

The utility model discloses a radial retainer of three-row cylindrical roller variable pitch bearing, including annular support body, the circumference of support body is equipped with a plurality of pockets that run through around the support body center evenly distributed, and each pocket includes two end inner walls that are parallel to each other, two corresponding side inner walls, and each side inner wall includes straight-through section and circular arc section, and the distance between two straight-through sections of single pocket is greater than the minimum distance between two circular arc sections, and the juncture of straight-through section and circular arc section of side inner wall is provided with the volume portion that reduces that carries out spacing after being convenient for the rolling element to install; the utility model has the advantages of simple structure and reasonable design, can pack the rolling element into the holder in the back, assemble holder and rolling element as whole and interior outer lane, when reaching the fast assembly purpose, also can utilize the rolling element to guide the holder at the during operation, and the holder can be in unsettled state in the bearing, has avoided producing the friction between holder and the interior outer lane, is favorable to bearing life's extension.

Description

Radial retainer of three-row cylindrical roller variable pitch bearing

Technical Field

The utility model belongs to the technical field of the bearing holder design, concretely relates to three rows of cylindrical roller become radial holder of oar bearing.

background

The variable pitch bearing is an important component of an electric variable pitch system, the inner ring and the outer ring are respectively connected with the blade and the hub through bolts, and when the wind direction changes, the windward angle of the blade is changed by the rotation of the variable pitch drive motor bearing, so that the blade is kept in the optimal windward state, and the lift force of the blade is controlled. The pitch bearing is not only used for changing the pitch, but also used as a connecting piece between the blade and the hub, so that the pitch bearing also has the function of transferring load, regular maintenance needs to be carried out on the pitch bearing, the pitch bearing is lubricated, and the pitch bearing can normally and effectively work.

At present, a pitch bearing is mostly composed of an inner ring, an outer ring, rolling bodies and a retainer, wherein the retainer refers to a bearing part which is partially wrapped around all or part of the rolling bodies and moves along with the rolling bodies to isolate the rolling bodies, and the rolling bodies are generally guided and retained in the bearing. The conventional radial retainer for the variable pitch bearing is easy to contact with an inner ring or an outer ring during working, and after the radial retainer is used for a long time, the retainer is abraded, even the inner ring and the outer ring are abraded seriously, and the service life of the bearing is influenced.

Disclosure of Invention

the utility model provides a solve above-mentioned technical problem, the utility model provides a radial holder of three rows of cylindrical roller become oar bearing, can pack into the rolling element in the holder back, assemble holder and rolling element as whole and interior outer lane, when reaching the fast assembly purpose, also can be at the during operation, utilize the rolling element to guide the holder, and the holder can be in unsettled state in the bearing, avoided producing the friction between holder and the interior outer lane, be favorable to bearing life's extension.

The utility model adopts the technical proposal that: a radial retainer of a three-row cylindrical roller variable pitch bearing comprises an annular frame body, wherein a plurality of through pockets which are uniformly distributed around the center of the frame body are circumferentially arranged on the frame body, each pocket comprises two end inner walls which are parallel to each other and two corresponding side inner walls, each side inner wall comprises a straight-through section and an arc section, the distance between the two straight-through sections of a single pocket is greater than the minimum distance between the two arc sections, and a contraction part which is convenient for limiting after a rolling body is installed is arranged at the junction of the straight-through section and the arc section of each side inner wall; the positions of the arc sections of the side inner walls of the two adjacent pockets are opposite.

The rack body is characterized by further comprising a plurality of rib plates arranged on the inner wall and the outer wall of the rack body, the rib plates are integrally connected with the rack body, and the rib plates are uniformly distributed around the center of the rack body.

When the rolling bearing works, one side of the pocket hole close to the straight-through section is a mounting end, one side of the pocket hole far away from the straight-through section is a limiting end, the rolling bodies are arranged in the pocket hole from the mounting end, the rolling bodies are limited by using a shrinkage part between the straight-through section and the circular arc section, the rolling bodies are prevented from falling towards the direction of the straight-through section, when the rolling bodies are completely arranged in the pocket hole, the rolling bodies and the retainer are assembled into an integral structure, and then the retainer and the rolling bodies are arranged in the inner ring and the outer ring; the bearing is at the moving in-process, along with the increase of rolling element operating time, even the volume portion that contracts between direct section and the circular arc section produces wearing and tearing, because the circular arc section in pocket hole is the staggered distribution, also can make the holder be in the intermediate position in interior outer lane clearance all the time, reach unsettled purpose, can not take place the friction with interior outer lane, the during operation rolling element takes place to rotate, then the guide holder rotates, the effectual life who improves the holder, reach bearing life's extension.

Each side inner wall consists of a straight section and an arc section, and the distance between the two straight sections of a single pocket is greater than the minimum distance between the two arc sections; the purpose of this is: can regard as the initial end of rolling element installation with the direct section, and the circular arc section is as spacing end, and the rolling element is installed pocket downthehole back promptly, and the circular arc section and the rolling element outer wall contact of side inner wall to the restriction rolling element drops, reaches spacing purpose, and the pocket hole is crisscross distributed structure in addition, can be so that the cage when assembling the bearing in, realizes unsettled purpose, has avoided cage and interior outer lane to take place to contact, causes the friction.

A shrinkage part convenient for mounting the rolling body is arranged at the junction of the straight section and the arc section of the side inner wall; the purpose of this is: at the initial stage that the rolling element was installed in the holder, can drop towards the straight-through section direction in pocket hole through the restriction rolling element of the volume portion that contracts, played spacing purpose, in addition because the circular arc section in pocket hole has restricted the other direction of motion of rolling element to make the stable installation of rolling element form monolithic structure in the holder, be convenient for carry out the assembly of bearing.

The positions of the arc sections of the side inner walls of the two adjacent pockets are opposite; the purpose of this is: when the retainer and the rolling body are arranged in the bearing, the retainer is in a suspended state, and the retainer is prevented from being abraded.

The utility model has the advantages that: the utility model has the advantages of simple structure and reasonable design, can pack the rolling element into the holder in the back, assemble holder and rolling element as whole and interior outer lane, when reaching the fast assembly purpose, also can utilize the rolling element to guide the holder at the during operation, and the holder can be in unsettled state in the bearing, has avoided producing the friction between holder and the interior outer lane, is favorable to bearing life's extension.

Drawings

Fig. 1 is a perspective view of the present invention;

Fig. 2 is a schematic view of a partial plan structure of the present invention;

FIG. 3 is a schematic view of a partial three-dimensional structure of the present invention;

3 fig. 3 4 3 is 3 a 3 cross 3- 3 sectional 3 view 3 a 3- 3 a 3 of 3 fig. 3 2 3 according 3 to 3 the 3 present 3 invention 3; 3

Fig. 5 is a cross-sectional view of B-B of fig. 4 in accordance with the present invention;

Fig. 6 is an enlarged view of a portion of fig. 4 according to the present invention;

Fig. 7 is an assembly view of the present invention.

The labels in the figure are: 1. a frame body; 2. a pocket hole; 21. an end inner wall; 22. a side inner wall; 221. a straight-through section; 222. a circular arc section; 223. a reduction unit; 3. a rib plate; 4. and a rolling body.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1-6, a radial cage of a three-row cylindrical roller pitch bearing comprises an annular cage body 1, wherein a plurality of through pockets 2 uniformly distributed around the center of the cage body 1 are arranged in the circumferential direction of the cage body 1, each pocket 2 comprises two end inner walls 21 parallel to each other and two corresponding side inner walls 22, each side inner wall 22 comprises a through section 221 and an arc section 222, the distance between the two through sections 221 of a single pocket 2 is greater than the minimum distance between the two arc sections 222, and a contraction portion 223 convenient for limiting after a rolling element 4 is installed is arranged at the junction of the through section 221 and the arc section 222 of the side inner wall 22; the positions of the circular arc sections 222 of the side inner walls 22 of two adjacent pockets 2 are opposite.

The frame is characterized by further comprising a plurality of rib plates 3 arranged on the inner wall and the outer wall of the frame body 1, wherein the rib plates 3 are integrally connected with the frame body 1, and the rib plates 3 are uniformly distributed around the center of the frame body 1.

As shown in fig. 7, N is the cage according to this embodiment, the number of N is one, and the crosstalk amount between the cage and the rolling elements 4 along the radial direction thereof is controlled to be 0.3mm to 0.4mm, so that the rolling elements 4 can be kept rotating in the pockets 2, thereby avoiding the problem that the rolling elements 4 cannot rotate due to too small crosstalk amount, and avoiding the rolling elements 4 from shaking in the pockets 2 due to too large crosstalk amount, thereby damaging the rolling elements 4 and the cage.

When the bearing works, one side of the pocket 2 close to the through section 221 is a mounting end, one side far away from the through section 221 is a limiting end, the rolling bodies 4 are installed into the pocket 2 from the mounting end, the rolling bodies 4 are limited by the shrinkage part 223 between the through section 221 and the circular arc section 222, the rolling bodies 4 are prevented from falling towards the direction of the through section 221, when the rolling bodies 4 are all installed into the pocket 2, the rolling bodies 4 and the retainer are assembled into an integral structure, and then the retainer and the rolling bodies 4 are installed into the inner ring and the outer ring, so that the bearing is assembled; the bearing is at the moving in-process, along with the increase of rolling element 4 operating time, even the shrinkage portion 223 between direct section 221 and the arc section 222 produces wearing and tearing, because the arc section 222 of pocket hole 2 is the staggered distribution, also can make the holder be in the intermediate position in interior outer lane clearance all the time, rolling element 4 meets with interior outer lane promptly, and the holder reaches unsettled purpose, can not take place the friction with interior outer lane, during operation rolling element 4 takes place to rotate, then the guide holder rotates, the effectual life who improves the holder, reach bearing life's extension.

Claims

1. The utility model provides a radial holder of three rows of cylinder roller change oar bearings which characterized in that: the rolling element bearing frame comprises an annular frame body, wherein a plurality of through pockets which are uniformly distributed around the center of the frame body are arranged in the circumferential direction of the frame body, each pocket comprises two end inner walls which are parallel to each other and two corresponding side inner walls, each side inner wall comprises a straight-through section and an arc section, the distance between the two straight-through sections of a single pocket is greater than the minimum distance between the two arc sections, and a shrinkage part which is convenient for limiting after a rolling element is installed is arranged at the junction of the straight-through section and the arc section of each side inner wall; the positions of the arc sections of the side inner walls of the two adjacent pockets are opposite.

2. the radial cage of a three-row cylindrical roller pitch bearing according to claim 1, characterized in that: the rack body is characterized by further comprising a plurality of rib plates arranged on the inner wall and the outer wall of the rack body, the rib plates are integrally connected with the rack body, and the rib plates are uniformly distributed around the center of the rack body.