CN219082089U

CN219082089U - Bidirectional thrust roller bearing for stacker crane

Info

Publication number: CN219082089U
Application number: CN202223334668.9U
Authority: CN
Inventors: 辛厚谊; 宋晓梅; 王中; 赵健
Original assignee: Zhenjiang Feiya Bearing Co ltd
Current assignee: Zhenjiang Feiya Bearing Co ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-05-26
Anticipated expiration: 2032-12-12

Abstract

The utility model discloses a bidirectional thrust roller bearing for a stacker crane, wherein the side surfaces of two axial ends of an outer ring are respectively provided with a sinking table, the central shaft of the sinking table is collinear with the central shaft of the outer ring, each sinking table is internally provided with a thrust roller retainer, a plurality of thrust rollers, a retainer ring and a sealing cover, the central shaft of the thrust roller retainer is collinear with the central shaft of the outer ring, the central shaft of the thrust rollers is perpendicular to the central shaft of the outer ring, the outer diameter of the thrust rollers is larger than the axial thickness of the thrust roller retainer, the side surfaces of the thrust rollers are in rolling contact with the bottom surface of the sinking table, and a retainer ring is arranged on the side of the thrust rollers far away from a rolling body and is in rolling contact with the side surfaces of the thrust rolling body; the friction between the end face of the roller and the end face of the retainer ring is converted into rolling friction between the thrust roller and the bottom face of the outer ring sinking table when the traditional bearing bears axial overturning force, so that the axial bearing capacity of the bearing is improved and the service life of the bearing is prolonged when the stacker runs.

Description

Bidirectional thrust roller bearing for stacker crane

Technical Field

The utility model relates to a bearing structure, in particular to a bidirectional thrust cylindrical roller bearing which is mainly used for a logistics storage stacker crane and has supporting and guiding functions between a stacker and a track.

Background

Stacker is a special crane for carrying, stacking and picking and placing goods from a goods shelf in a warehouse, and the stacker crane guides a trolley to run and prevent the trolley from toppling by utilizing I-steel ground guide rails, so that the stacker is widely applied along with the development of computer control technology and automatic stereoscopic warehouse. In the stacker, the roller bearing is mainly used for supporting and guiding the trolley and the I-steel guide rail. When the stacker is in operation, the bearings can be subjected to radial forces generated by the left-right deviation trend of the equipment and axial forces generated by the overturning trend of the equipment.

The traditional roller bearing structure for the stacker is characterized in that one or more groups of cylindrical rollers are arranged in an outer ring raceway, and the cylindrical roller bearing with the structure can bear larger radial load but has lower axial load bearing capacity. When the bearing is subjected to axial overturning load, the inner side surfaces of the roller end surfaces and the bearing outer ring raceway flanges are stressed, so that the roller end surfaces and the outer ring flanges can be continuously rubbed under the axial load, and the bearing is extremely easy to wear and ablate, so that the service life of the bearing is influenced.

The bearing structure disclosed in the document of Chinese patent publication No. CN2921426Y and named as a bidirectional thrust roller bearing is characterized in that two inner space rings are additionally arranged on the shaft ring, the seat rings and the retainer outside the roller assembly, and a spacer ring is arranged between the two seat rings to play a role in adjusting axial play, but when the bearing bears a large axial load, the adjusting effect of the spacer ring is weakened, the spacer ring is a wearing part, and the service life of the spacer ring is not long.

The bearing structure disclosed in the document with the Chinese patent publication number of CN217152649U and the name of thrust roller bearing and guide wheel adopts a thrust retainer ring between the bearing outer ring and the bearing inner ring, so that a first rollaway nest is formed between the bearing outer ring and the bearing inner ring, the two axial ends of the bearing inner ring are respectively provided with the thrust retainer ring, a second rollaway nest is formed between the thrust retainer ring and the stepped surface of the bearing outer ring, a thrust roller retainer is arranged in the second rollaway nest, the second rollaway nest on two sides of the bearing inner ring is matched with the rolling of the thrust rollers, and the bidirectional axial impact force can be borne, but the bearing structure is complex and is not suitable for a stacker crane, the thrust retainer ring is contacted with the bearing inner ring, and the inner ring is easy to damage when bearing axial overturning load.

Disclosure of Invention

The utility model aims to solve the problem of short service life of the existing thrust roller bearing when bearing axial overturning load, and provides a bidirectional thrust roller bearing for a stacker crane, which is simple and reliable in structure and long in service life.

The technical scheme adopted by the utility model is as follows: the anti-collision device comprises an outer ring, rolling bodies, a retainer ring, an inner ring and a sealing cover, wherein a sinking table is respectively arranged on the side surfaces of the two axial ends of the outer ring, the central shaft of the sinking table is collinear with the central shaft of the outer ring, the bottom surface of the sinking table is the surface close to the rolling bodies, and the top surface of the sinking table is the surface far away from the rolling bodies; each sinking platform is internally provided with a thrust roller retainer, a plurality of thrust rollers, a check ring and a sealing cover, the plurality of thrust rollers are uniformly supported on the thrust roller retainer along the circumferential direction, the central shaft of the thrust roller retainer is collinear with the central shaft of the outer ring, the central shaft of the thrust rollers is perpendicular to the central shaft of the outer ring, the outer diameter of the thrust rollers is larger than the axial thickness of the thrust roller retainer, the side surfaces of the thrust rollers are in rolling contact with the bottom surface of the sinking platform, and the check ring is arranged on the side, away from the rolling bodies, of the thrust rollers and is in rolling contact with the side surfaces of the thrust rolling bodies.

The two sinking tables 7 have the same structure, are symmetrical along the center of the outer ring, the outer diameter of the thrust roller retainer is equal to the inner diameter of the sinking table, the inner diameter of the sinking table is larger than the inner diameter of the inner ring, and the outer diameter of the retainer ring is smaller than the inner diameter of the sinking table.

The surface roughness of the contact surface of the retainer ring in rolling contact with the thrust roller and the sinking table is within Ra0.25.

A sealing cover is assembled on the top surface of the sinking platform, and the outer diameter of the sealing cover is equal to the inner diameter of the sinking platform.

An annular oil storage groove is formed in the middle of the roller path of the outer ring, the axial groove width of the oil storage groove is not more than one fifth of the total length of the double-row rolling bodies, and the radial groove depth of the oil storage groove is not more than the groove width of the oil storage groove.

The beneficial effects of the utility model after adopting the technical scheme are as follows:

1. according to the utility model, the thrust roller bearing assemblies are arranged in the sinking tables at the two ends of the outer ring, so that the friction between the end faces of the rollers and the end faces of the retainer rings when the traditional bearing bears axial overturning force is converted into rolling friction between the thrust rollers and the bottom face of the sinking table of the outer ring, and the axial bearing capacity of the bearing is greatly improved and the service life of the bearing is prolonged when the stacker runs.

2. The thrust roller component is guided to rotate by the inner circumferential surface of the outer ring sinking table, and the outer ring sinking table surface is directly used as a raceway surface of the thrust roller component, so that the assembly complexity of the bearing is reduced on the whole, and the reliability of the bearing is improved.

3. An oil storage groove is formed in the bearing outer ring raceway and can be used for storing lubricating grease, and lubricating grease in the oil storage groove can continuously enter the bearing raceway to achieve continuous lubrication in the bearing operation process.

Drawings

The utility model is described in further detail below with reference to the attached drawings and detailed description:

FIG. 1 is a schematic view of the axial cross-section of the present utility model;

FIG. 2 is a block diagram of the outer race of FIG. 1;

FIG. 3 is an enlarged view of the thrust roller assembly of FIG. 1;

in the figure: 1. an outer ring; 2. a rolling element; 3. a retainer ring; 4. an inner ring; 5. a sealing cover; 7. a sinking platform; 8. an oil storage tank; 61. a thrust roller; 62. thrust roller holder.

Detailed Description

Referring to fig. 1-3, the utility model comprises an outer ring 1, rolling bodies 2, a retainer ring 3, an inner ring 4 and a sealing cover 5, wherein the rolling bodies 2 are arranged in a raceway of the outer ring 1, the rolling bodies 2 are double-row rolling bodies, and the inner side of the double-row rolling bodies 2 is the inner ring 4.

The two axial end sides of the outer ring 1 are respectively provided with a sinking table 7, and the central axis of the sinking table 7 is collinear with the central axis of the outer ring 1. The bottom surface of the sinking table 7 is the surface close to the rolling elements 2, and the top surface of the sinking table 7 is the surface far away from the rolling elements 2.

The inner diameter of the sinking platform 7 is larger than that of the inner ring 4, the structures of the two sinking platforms 7 are the same, and the sinking platforms are symmetrical along the center of the outer ring 1.

Each sinking platform 7 is internally provided with a thrust roller assembly, a retainer ring 3 and a sealing cover 5, each thrust roller assembly consists of a thrust roller retainer 62 and a plurality of thrust rollers 61, the plurality of thrust rollers 61 are uniformly distributed along the circumferential direction of the thrust roller retainer 62, and the thrust roller retainer 62 is used for supporting the plurality of thrust rollers 61. The central axis of the thrust roller holder 62 is collinear with the central axis of the outer race 1, and the central axis of the thrust roller 61 is perpendicular to the central axis of the outer race 1.

The thrust roller holder 62 and the thrust rollers 61 are in rolling contact with the bottom surface of the sinking table 7 on the side near the rolling elements 2. The outer diameter of the thrust roller retainer 62 is equal to the inner diameter of the counter plate 7, and the outer diameter of the thrust roller 61 is larger than the axial thickness of the thrust roller retainer 62, so that the bottom surface of the counter plate 7 is used as the raceway surface of the thrust roller 61, and the surface roughness of the bottom surface of the counter plate 7 is controlled within Ra0.25.

The retainer ring 3 is provided on the side of the thrust roller holder 62 and the thrust roller 61 away from the rolling elements 2, the retainer ring 3 is in rolling contact with the thrust roller 61, and the end face of the retainer ring 3 in contact with the thrust roller 61 serves as the other raceway surface of the thrust roller assembly, and the surface roughness of the other raceway surface should be controlled within Ra0.25. The outer diameter of the retainer ring 3 is slightly smaller than the inner diameter of the sinking table 7, but is in full contact with the thrust roller 61.

And a sealing cover 5 is assembled on the top surface of the sinking platform 7, the outer diameter of the sealing cover 5 is equal to the inner diameter of the sinking platform 7, and the sealing cover is tightly assembled on the sinking platform 7 to play a role in sealing and dust prevention.

An annular oil storage groove 8 is formed in the middle of the raceway of the outer ring 1, the axial groove width of the oil storage groove 8 is not more than one fifth of the total length of the double-row rolling bodies 2, and the radial groove depth of the oil storage groove 8 is not more than the groove width of the oil storage groove, so that the oil storage groove is used for storing bearing lubricating grease.

When the axial overturning force acts on the two groups of thrust roller assemblies consisting of the thrust rollers 61 and the thrust roller retainers 62 at the two axial ends of the outer ring 1, the axial overturning force is converted into rolling friction force between the thrust rollers 61 and the bottom surface of the sinking platform 7, so that the axial bearing capacity of the bearing can be improved.

Claims

1. The utility model provides a two-way thrust roller bearing for stacker crane, includes outer lane (1), rolling element (2), retaining ring (3), inner circle (4) and sealed cowling (5), characterized by: the two axial end side surfaces of the outer ring (1) are respectively provided with a sinking table (7), the central axis of the sinking table (7) is collinear with the central axis of the outer ring (1), the bottom surface of the sinking table (7) is a surface close to the rolling body (2), and the top surface of the sinking table (7) is a surface far away from the rolling body (2); each sinking table (7) is internally provided with a thrust roller retainer (62), a plurality of thrust rollers (61), a check ring (3) and a sealing cover (5), the plurality of thrust rollers (61) are uniformly supported on the thrust roller retainer (62) along the circumferential direction, the central axis of the thrust roller retainer (62) is collinear with the central axis of the outer ring (1), the central axis of the thrust rollers (61) is perpendicular to the central axis of the outer ring (1), the outer diameter of the thrust rollers (61) is larger than the axial thickness of the thrust roller retainer (62) and the side surfaces of the thrust rollers (61) are in rolling contact with the bottom surface of the sinking table (7), and the check ring (3) is arranged on the side, away from the rolling bodies (2), of the thrust rollers (61) and the check ring (3) is in rolling contact with the side surfaces of the thrust rollers (61).

2. A bi-directional thrust roller bearing for stacker cranes according to claim 1, wherein: the two sinking tables (7) are identical in structure, symmetrical along the center of the outer ring (1), the outer diameter of the thrust roller retainer (62) is equal to the inner diameter of the sinking table (7), the inner diameter of the sinking table (7) is larger than the inner diameter of the inner ring (4), and the outer diameter of the retainer ring (3) is smaller than the inner diameter of the sinking table (7).

3. A bi-directional thrust roller bearing for stacker cranes according to claim 1, wherein: the surface roughness of the contact surface between the retainer ring (3) in rolling contact with the thrust roller (61) and the sinking table (7) is within Ra0.25.

4. A bi-directional thrust roller bearing for stacker cranes according to claim 1, wherein: the top surface of the sinking platform (7) is provided with a sealing cover (5), and the outer diameter of the sealing cover (5) is equal to the inner diameter of the sinking platform (7).

5. A bi-directional thrust roller bearing for stacker cranes according to claim 1, wherein: an annular oil storage groove (8) is formed in the middle of the raceway of the outer ring (1), the axial groove width of the oil storage groove (8) is not more than one fifth of the total length of the double-row rolling bodies (2), and the radial groove depth of the oil storage groove (8) is not more than the groove width of the oil storage groove.

6. A bi-directional thrust roller bearing for stacker cranes according to claim 1, wherein: the rolling elements (2) are double row rolling elements.