CN220910250U

CN220910250U - Bolt type ball roller bearing

Info

Publication number: CN220910250U
Application number: CN202322852396.XU
Authority: CN
Inventors: 张冬明; 赵健; 吴振群; 辛厚谊; 宋晓梅; 王中
Original assignee: Zhenjiang Feiya Bearing Co ltd
Current assignee: Zhenjiang Feiya Bearing Co ltd
Priority date: 2023-10-24
Filing date: 2023-10-24
Publication date: 2024-05-07
Anticipated expiration: 2033-10-24

Abstract

The utility model discloses a bolt type ball roller bearing, which belongs to the technical field of bearings and comprises a bolt shaft, a bearing outer ring and a retainer; the bolt shaft comprises a screw rod end and a mounting end, a retainer ring with the diameter larger than that of the screw rod end is arranged on the inner side of the screw rod end, a screwing part is arranged on the inner side of the mounting end, and a plurality of working surfaces are arranged on the periphery of the screwing part at equal intervals; the outer periphery of the mounting end is provided with a plurality of ball grooves along the length direction, the outer ring of the bearing is correspondingly sleeved on the outer periphery of the mounting end, the inner periphery of the outer ring of the bearing is correspondingly provided with a plurality of ball tracks with the ball grooves, the retainer is correspondingly arranged between the outer ring of the bearing and the mounting end, and a plurality of rolling bodies are rotationally clamped in the circumferential direction, and correspondingly rotate and are clamped between the ball grooves and the ball tracks. According to the utility model, one end of the bolt shaft is provided with the screwing part, and the screwing part is axially provided with a plurality of working surfaces, so that the strength of the matching surface of the assembly tool is increased, and the ball roller bearing is conveniently and fixedly connected with the support bracket of the vehicle door system.

Description

Bolt type ball roller bearing

Technical Field

The utility model belongs to the technical field of bearings, and particularly relates to a bolt type ball roller bearing.

Background

In a door system of a rail transit vehicle, a spherical roller bearing with a bolt shaft and a steel ball as rolling bodies is needed to be used when a door slides away, the spherical roller bearing is fixedly connected with an upper support bracket and a lower support bracket arranged on the door system through the bolt shaft and is supported on corresponding guide rails in a rolling way, the bolt shaft of the bearing penetrates through a mounting hole on the support bracket, the bolt shaft is fixed on the support bracket through a nut, and when the door is opened, the bearing plays a role in rolling support on the guide rails; when the door is closed, the bearing cooperates with the guide rail to secure the door to the vehicle body.

Because the bearing is exposed to the natural environment for a long time in operation, the bearing has higher requirements on sealing and corrosion resistance; in addition, the bearing is required to be flexible in rotation, low in noise, long in service life and easy to replace and maintain during operation. In order to facilitate bearing installation, a hexagonal counter bore is generally formed in the end face of the bolt shaft, the counter bore is used for being matched with a standard internal hexagonal wrench during installation, but due to limited space for supporting bearing installation of a vehicle door system, the size of the internal bolt shaft is smaller, the general external diameter is not larger than 30mm, the size of the internal hexagonal counter bore at the end part of the internal bolt shaft is smaller, the size of the internal hexagonal counter bore at the end part of the internal bolt shaft is small, the depth is shallower, wrench slipping is easily caused during bearing installation, and a torque wrench is generally required to be used for installing the bearing according to the torque specified by design during bearing installation, so that slipping phenomenon is further caused.

Disclosure of utility model

The utility model aims to: the utility model aims to provide a bolt type ball roller bearing, which adopts a bolt shaft structure easy to fix and clamp and improves the installation or disassembly efficiency of the ball roller bearing.

The technical scheme is as follows: the utility model provides a bolt type ball roller bearing, which comprises:

The bolt shaft comprises a bolt end and a mounting end, a retainer ring with the diameter larger than that of the bolt end is arranged on the inner side of the bolt end, a screwing part is arranged on the inner side of the mounting end, and a plurality of working surfaces are arranged on the periphery of the screwing part at equal intervals; the periphery of the mounting end is provided with a plurality of ball grooves along the length direction;

The bearing outer ring is correspondingly sleeved on the outer periphery of the mounting end, and a plurality of rollaway nest are correspondingly arranged on the inner periphery of the bearing outer ring and the ball groove;

the retainer is correspondingly arranged between the bearing outer ring and the mounting end, a plurality of rolling bodies are clamped in a circumferential rotation mode, and the rolling bodies are clamped between the ball groove and the roller path in a corresponding rotation mode.

Preferably, the number of the working surfaces on the periphery of the screwing part is two, three, four, five or six.

Preferably, the outer diameter of the screwing part is smaller than the outer diameter of the check ring.

Preferably, the inner rings at the two ends of the bearing outer ring are respectively provided with a first sealing step and a second sealing step, the first sealing step is clamped with a sealing cover, and a sealing ring is clamped between the second sealing step and the periphery of the mounting end.

Preferably, the periphery of the sealing cover is provided with a connecting part clamped with the inner ring of the first sealing step.

Preferably, the sealing cover is of a closed structure or an open structure.

Preferably, the inner ring of the sealing ring is provided with a sealing lip.

Preferably, the outer periphery of the bearing outer ring is provided with an arc-shaped surface protruding outwards along the axial direction of the bearing outer ring.

Compared with the prior art, the utility model has at least the following beneficial effects:

1. the utility model has simple integral structure, convenient manufacture and low cost;

2. One end of the bolt shaft is provided with a screwing part, and a plurality of working surfaces are axially arranged on the screwing part, so that the strength of the matching surface of the assembly tool is increased, the ball roller bearing is conveniently matched with the assembly tool to realize the fixed connection between the ball roller bearing and a support bracket of a vehicle door system, and the problem of slipping in the installation process is effectively solved;

3. The check ring is integrally arranged at one end of the bolt shaft, so that the functions of looseness prevention, sealing and dust prevention can be achieved on the bolt shaft; the bearing does not need to be provided with a gasket when being provided with, so that the installation and use steps can be reduced, and the problem of less installation and missing installation of the gasket is fundamentally avoided;

4. The two ends of the outer ring of the bearing are respectively provided with a sealing cover and a sealing ring in a matching way, and the exposed rotating structure of the bearing can be completely sealed by adopting an integral sealing cover, so that a good sealing effect is achieved; the sealing ring structure can also realize the sealing connection between the bolt shaft and the outer ring of the bearing, so that the ball roller bearing has good dustproof effect and the service life of the bearing is prolonged;

5. The arc-shaped surface is arranged on the outer ring of the bearing, so that the adaptability is stronger and the service life of the ball roller bearing is prolonged when the ball roller bearing is matched with the track of the car door system.

Drawings

FIG. 1 is a schematic axial view of a ball roller bearing of the present utility model;

FIG. 2 is a left side end view of the ball roller bearing of FIG. 1;

fig. 3 is an enlarged schematic view of the structure at a in fig. 1.

Reference numerals: 100. ball roller bearings; 1. a bolt shaft; 11. a screw end; 12. a retainer ring; 13. a screwing part; 131. a working surface; 14. a mounting end; 141. a ball groove; 2. a bearing outer ring; 21. a first sealing step; 22. a raceway; 23. a second sealing step; 24. an arc surface; 3. a sealing cover; 31. a connection part; 4. a retainer; 5. a rolling element; 6. a seal ring; 61. and a sealing lip.

Detailed Description

In order to make the purposes, technical schemes and advantages of the present utility model more clear, the technical schemes of the present utility model will be clearly and completely described below with reference to fig. 1 to 3. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the utility model, fall within the scope of protection of the utility model.

As shown in fig. 1-2, the bolt-type ball roller bearing disclosed by the utility model, the ball roller bearing 100 comprises a bolt shaft 1, a bearing outer ring 2, a retainer 4 and rolling bodies 5. The bolt shaft 1 comprises a bolt end 11 and a mounting end 14, a retainer ring 12 with the diameter larger than the diameter of the bolt end 11 is arranged on the inner side of the bolt end 11, a threaded area is arranged on the periphery of the bolt end 11 of the bolt shaft 1 and used for being fixedly connected with an upper supporting bracket and a lower supporting bracket arranged on a car door system, and after the retainer ring arranged on the inner side of the bolt end 11 is connected with the supporting bracket, the retainer ring plays a role in preventing looseness, and also plays a role in sealing and dust prevention on a matched part supported by the bolt end and the supporting bracket. The inner side of the mounting end 14 is provided with the screwing part 13, the periphery of the screwing part 13 is provided with a plurality of working surfaces 131 at equal intervals, the number of the working surfaces 131 at the periphery of the screwing part 13 is two, three, four, five or six, so that the ball roller bearing 100 can be conveniently fastened with the support bracket by using an assembling tool such as a wrench when being fixedly mounted with the support bracket of the vehicle door system, and the operation difficulty of fixed connection is reduced. A plurality of ball grooves 141 are formed along the length direction of the outer circumference of the mounting end 14; in this embodiment, the number of the ball grooves 141 provided on the outer periphery of the mounting end 14 is two, the bearing outer ring 2 is correspondingly sleeved on the outer periphery of the mounting end 14, and the inner periphery of the bearing outer ring 2 is correspondingly provided with two raceways 22 corresponding to the ball grooves 141. The retainer 4 is correspondingly arranged between the bearing outer ring 2 and the mounting end 14, a plurality of rolling bodies 5 are clamped in a circumferential rotation manner, the retainer 4 plays a role in isolating and guiding the rolling bodies 5 to directionally move along the bearing outer ring 2 and the mounting end 14, the rolling bodies 5 can adopt wear-resistant steel balls, the rolling bodies 5 are correspondingly rotationally clamped between the ball grooves 141 and the ball tracks 22, the arranged bearing outer ring 2 and the mounting end 14 of the bolt shaft 1 can stably and flexibly rotate, and the running noise of the ball roller bearing is reduced.

As shown in fig. 1-2, in a preferred embodiment, the outer diameter of the screwing part 13 is smaller than the outer diameter of the retainer ring 12, so that the screwing part 13 forms a blocking structure at the retainer ring 12, and the screwing part is easy to be fixedly clamped when the wrench is used for clamping the rotating part.

As shown in fig. 1 and 3, a first sealing step 21 and a second sealing step 23 are respectively arranged on inner rings at two ends of a bearing outer ring 2, a sealing cover 3 is clamped on the first sealing step 21, a connecting part 31 clamped with the inner ring of the first sealing step 21 is arranged on the periphery of the sealing cover 3, and the sealing cover 3 can be stably and firmly clamped in the first sealing step 21 through the connecting part 31; the sealing cover 3 is of a closed structure or an open structure, that is, the sealing cover 3 can adopt a closed end cover structure or a sealing ring and a detachable cover body structure matched with the sealing ring, and the sealing cover is selected according to requirements. The sealing ring 6 is clamped between the second sealing step 23 and the periphery of the mounting end 14, the inner ring of the sealing ring 6 is provided with a sealing lip 61, and the sealing ring 6 with the structure can form a good sealing structure with the circumference of the bolt shaft 1 without affecting the free rotation of the bearing outer ring 2.

As shown in fig. 1, the outer periphery of the bearing outer ring 2 is provided with an arc surface 24 protruding outwards along the axial direction of the bearing outer ring, so that when the ball roller bearing is matched with a track of a vehicle door system for use, the adaptability is stronger, and the service life of the ball roller bearing is prolonged.

The foregoing is a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model and are intended to be comprehended within the scope of the present utility model.

Claims

1. A bolt-type ball roller bearing, characterized in that the ball roller bearing (100) comprises:

The bolt shaft (1), the bolt shaft (1) comprises a bolt end (11) and a mounting end (14), a retainer ring (12) with the diameter larger than that of the bolt end (11) is arranged on the inner side of the bolt end (11), a screwing part (13) is arranged on the inner side of the mounting end (14), and a plurality of working surfaces (131) are arranged on the periphery of the screwing part (13) at equal intervals; the periphery of the mounting end (14) is provided with a plurality of ball grooves (141) along the length direction;

The bearing outer ring (2) is correspondingly sleeved on the outer periphery of the mounting end (14), and a plurality of rollaway nest (22) are correspondingly arranged on the inner periphery of the bearing outer ring (2) and the ball groove (141);

The retainer (4) is correspondingly arranged between the bearing outer ring (2) and the mounting end (14), a plurality of rolling bodies (5) are clamped in a circumferential rotation mode, and the rolling bodies (5) are correspondingly clamped between the ball grooves (141) and the ball tracks (22) in a rotation mode.

2. Bolt-type ball roller bearing according to claim 1, characterized in that the number of working surfaces (131) of the outer periphery of the tightening part (13) is two, three, four, five or six.

3. Bolt-type ball roller bearing according to claim 2, characterized in that the outer diameter of the tightening part (13) is smaller than the outer diameter of the retainer ring (12).

4. The bolt type ball roller bearing according to claim 1, wherein the inner rings at two ends of the bearing outer ring (2) are respectively provided with a first sealing step (21) and a second sealing step (23), the first sealing step (21) is provided with a sealing cover (3) in a clamping manner, and a sealing ring (6) is provided between the second sealing step (23) and the periphery of the mounting end (14).

5. The bolt type ball roller bearing according to claim 4, wherein the outer periphery of the seal cover (3) is provided with a connecting portion (31) which is engaged with the inner ring of the first seal step (21).

6. Bolt-type ball roller bearing according to claim 5, characterized in that the sealing cap (3) is of closed or open construction.

7. Bolt-type ball roller bearing according to claim 4, characterized in that the inner ring of the sealing ring (6) is provided with a sealing lip (61).

8. Bolt-type ball roller bearing according to claim 1, characterized in that the outer periphery of the bearing outer ring (2) is provided with an arcuate surface (24) protruding outwards in its axial direction.