CN220791773U - Composite bearing - Google Patents

Abstract

The utility model discloses a composite bearing, which belongs to the technical field of bearings and comprises a first supporting ring, a first rolling body and a second supporting ring, wherein the second supporting ring comprises an axial supporting part and a radial supporting part, the axial supporting part extends along the radial direction, the radial supporting part extends along the axial direction, the first rolling body is connected between the first supporting ring and the axial supporting part in a rolling way, the first rolling body is used for bearing axial load, the second rolling body is arranged on the inner diameter side of the radial supporting part, the second rolling body is connected between a part to be installed and the radial supporting part in a rolling way, the second rolling body is used for bearing radial load, and the axial stress center of the first rolling body corresponds to the radial range of the radial supporting part. When the first rolling body bears the axial load, the load is transmitted along the axial direction of the radial supporting part, so that the overturning moment of the radial supporting part caused by the load in the axial direction is avoided or reduced, the degree of inconsistent wear on the two ends of the second rolling body is reduced, and the service life of the composite bearing is prolonged.

Description

Composite bearing

Technical Field

The utility model relates to the technical field of bearings, in particular to a composite bearing.

Background

The bearing is an important part in modern mechanical equipment, and has the main functions of supporting a mechanical rotating body, reducing the friction coefficient in the motion process and ensuring the rotation precision. At present, the bearing is widely applied to parts needing rotation and swing in various industries.

According to the stress direction of the bearing, the bearing can be divided into a radial load bearing and an axial load bearing, under certain specific working conditions, the rotation part of the mechanical equipment needs to bear the radial load and the axial load at the same time, and a plurality of bearings are needed to be arranged and combined for application so as to realize corresponding supporting effects. Therefore, the mounting position and the mounting space are required to be designed for bearings of different individuals in the design process, resulting in an insufficiently compact structure and a large demand for space.

For example, chinese patent application publication No. CN 107975535A discloses a combination bearing of a cylindrical roller and a thrust steel ball, which includes an outer ring, an inner ring, a thrust steel ball, a cylindrical roller and a retainer, between which a channel for mounting the cylindrical roller and a raceway for mounting the steel ball are provided. This scheme has combined cylindrical roller and thrust steel ball, forms the integrated composite bearing, but, the inner circle of this scheme has adopted U type structure, is used for placing cylindrical roller in the U type structure, and the support arm setting of thrust steel ball laminating U type structure when the bearing bears thrust operation, leads to U type structure to produce the tilting force and leads to the wearing and tearing at cylindrical roller both ends inconsistent easily, influences the life of bearing.

For another example, chinese patent publication No. CN 201802760U discloses a cylindrical roller and bi-directional thrust ball combined bearing, which is composed of an outer ring, a steel ball, an inner ring, a fastening screw, a retainer, a second inner ring, and a radial roller. The outer diameter of the inner ring is set to be in a step shape in two layers with different sizes, a second inner ring is coaxially and parallelly arranged on one side of the small outer diameter of the inner ring, the inner ring corresponds to at least two groups of screw holes which are axially and uniformly distributed on the second inner ring, and fastening screws are arranged in the screw holes; an outer ring is coaxially arranged outside the small outer diameter of the inner ring, and radial rollers are arranged between the inner diameter of the outer ring and the small outer diameter of the inner ring; two retainers are coaxially and symmetrically arranged between the two sides of the outer ring and the inner side of the large outer diameter of the inner ring and the inner side of the second inner ring, three rings of pockets are uniformly distributed on each retainer to form a net shape, and steel balls are arranged in the pockets. According to the scheme, axial bidirectional thrust load can be realized through the inner ring and the second inner ring, but the problem that two ends of the radial roller are not uniformly worn is solved.

In summary, how to compound the radial load bearing and the axial load bearing, and avoid or reduce the problem of inconsistent wear, and effectively improve the service life of the bearing.

Disclosure of Invention

The utility model aims to provide a composite bearing to solve the problems in the prior art, and the stress center of a first rolling body is corresponding to the radial range of a radial supporting part, so that when the first rolling body bears an axial load, the load can be transmitted along the axial direction of the radial supporting part, the overturning moment of the radial supporting part caused by the load in the axial direction is avoided or reduced, the degree of inconsistent abrasion to two ends of a second rolling body is reduced, and the service life of the composite bearing is prolonged.

In order to achieve the above object, the present utility model provides the following solutions:

the utility model provides a composite bearing, which comprises a first supporting ring, a first rolling body and a second supporting ring which are sequentially arranged along the axial direction, wherein the second supporting ring comprises an axial supporting part and a radial supporting part which are mutually connected, the axial supporting part extends along the radial direction, the radial supporting part extends along the axial direction, the first rolling body is in rolling connection between the first supporting ring and the axial supporting part, the first rolling body is used for bearing axial load, the inner diameter side of the radial supporting part is provided with a second rolling body, the second rolling body is in rolling connection between a part to be installed and the radial supporting part, the second rolling body is used for bearing radial load, and the axial stress center of the first rolling body corresponds to the radial range of the radial supporting part.

Preferably, the first rolling bodies adopt balls, and a first annular groove for the balls to roll is formed in one surface of the axial supporting part facing the first supporting ring.

Preferably, the first support ring comprises a first annular body, and a surface of the first annular body facing the axial support part is provided with a second annular groove for the balls to roll.

Preferably, the bearing comprises a first retainer, the first retainer is arranged between the first support ring and the axial support part, the first retainer comprises a bottom ring, an inner ring and an outer ring, the inner ring and the outer ring are respectively connected with the inner diameter side and the outer diameter side of the bottom ring, a plurality of first limiting holes are formed in the bottom ring along the circumferential direction, the balls are located in the first limiting holes, and the diameter of the first limiting holes is smaller than that of the balls.

Preferably, the bottom ring is disposed adjacent to the first support ring, and the inner ring and the outer ring extend in the axial direction toward the axial support portion.

Preferably, the second rolling element adopts a roller, and further comprises a second cage, and the roller is installed in the second cage.

Preferably, the axial supporting portion extends along the radial direction to the inner diameter side of the radial supporting portion to form an axial limiting structure, and the end portion of the second retainer abuts against the axial limiting structure.

Preferably, the second retainer comprises a second annular body, a plurality of second limiting holes are circumferentially formed in the side wall of the second annular body, the second limiting holes extend along the axial direction, and the rollers are located in the second limiting holes.

Preferably, the width of the second limiting hole penetrating through the outer diameter surface of the second annular body is smaller than the width of the second limiting hole penetrating through the inner diameter surface of the second annular body, the two widths are smaller than the diameter of the roller, and the roller is in direct contact with the part to be installed.

Preferably, the outer diameter surface of the radial supporting part is provided with a third annular groove, and an oil filling hole which radially penetrates through the radial supporting part is arranged in the third annular groove.

Compared with the prior art, the utility model has the following technical effects:

(1) According to the utility model, the stress center of the first rolling body corresponds to the radial range of the radial supporting part, so that when the first rolling body bears an axial load, the load can be transmitted along the axial direction of the radial supporting part, and the overturning moment of the radial supporting part caused by the load in the axial direction is avoided or reduced, thereby reducing the inconsistent abrasion degree of the two ends of the second rolling body and prolonging the service life of the composite bearing;

(2) The first rolling body adopts the balls, the first annular groove and the second annular groove for the balls to roll are respectively arranged on the axial supporting part and the first supporting ring, and the rolling paths of the balls can be restrained by the first annular groove and the second annular groove, so that the stability of the relative positions can be maintained when the balls bear axial load, and the balls are prevented from being separated from the composite bearing to cause damage; in addition, the first retainer is also arranged, the first retainer is used for restraining the circumferential intervals of the balls, so that the contact between the balls is avoided, and the friction loss and collision extrusion damage to the balls are reduced;

(3) The bottom ring of the first retainer is arranged close to the first supporting ring, the inner ring and the outer ring of the first retainer extend towards the axial supporting part along the axial direction, namely, the first limiting holes for limiting the positions of the balls of the first retainer are arranged close to the first supporting ring, the positions are arranged in the direction away from the radial supporting part and bear radial load, when the radial supporting part is subjected to radial load runout or vibration, enough movable space can be provided for the balls, a certain movable allowance can be provided on the basis of ensuring that the balls are effectively restrained, and the running stability of the composite bearing is ensured;

(4) The second rolling body adopts the roller, and further comprises a second retainer, wherein the position of the roller is restrained by the second retainer, so that the roller can keep the stability of the relative position when bearing radial load, an axial limiting structure is formed by the axial supporting part, the axial position of the second retainer is restrained by the axial limiting structure, and the position stability of the roller is ensured when bearing axial load by the ball;

(5) According to the utility model, the second limiting hole for installing the roller is formed in the second retainer, the roller is limited in the second retainer by utilizing the second limiting hole, and the position of the roller can be better restrained, so that the roller can directly contact a part to be installed without arranging a bearing inner ring, and the manufacturing cost of the composite bearing is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of the axial cross-section structure of FIG. 1;

FIG. 3 is a schematic view of the explosive structure of FIG. 1;

FIG. 4 is a schematic view of a first cage according to the present utility model;

FIG. 5 is a schematic view of a second cage according to the present utility model;

FIG. 6 is a schematic view of the radial cross-sectional structure of FIG. 5;

FIG. 7 is a schematic view of a second support ring according to the present utility model;

1, a first support ring; 11. a first annular body; 12. a second annular groove; 2. a first holder; 21. a bottom ring; 211. a first limiting hole; 22. an inner ring; 23. an outer ring; 3. a first rolling element; 4. a second support ring; 41. an axial support portion; 411. a first annular groove; 412. an axial limit structure; 42. a radial support portion; 421. a third annular groove; 422. an oil filling hole; 5. a second holder; 51. a second annular body; 52. a second limiting hole; 6. and a second rolling element.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model aims to provide a composite bearing so as to solve the problems in the prior art, and the stress center of a first rolling body is corresponding to the radial range of a radial supporting part, so that when the first rolling body bears an axial load, the load can be transmitted along the axial direction of the radial supporting part, the overturning moment of the radial supporting part caused by the load in the axial direction is avoided or reduced, the degree of inconsistent wear on two ends of a second rolling body is reduced, and the service life of the composite bearing is prolonged.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

As shown in fig. 1 to 7, the present utility model provides a composite bearing comprising a first support ring 1, a first rolling element 3 and a second support ring 4 sequentially arranged in an axial direction, wherein the first support ring 1 adopts a circular ring for connecting an axially arranged support member or load, the second support ring 4 adopts a circular ring, an inner diameter side thereof is for mounting on a portion to be mounted (for example, on a rotating shaft or a support shaft), and the first rolling element 3 may adopt a cylindrical or spherical rolling element for providing rolling support. The second support ring 4 includes an axial support portion 41 and a radial support portion 42 connected to each other, the axial support portion 41 extending in a radial direction, and the radial support portion 42 extending in an axial direction, a radial thickness of the axial support portion 41 being greater than a radial thickness of the radial support portion 41, and an axial width of the radial support portion 42 being greater than an axial width of the axial support portion 41. The first rolling elements 3 are rollingly connected between the first support ring 1 and the axial support 41, and the first rolling elements 3 bear an axial load and reduce friction loss. The radial support portion 42 is provided at an inner diameter side thereof with second rolling elements 6, and the second rolling elements 6 may be cylindrical or spherical rolling elements for providing rolling support. The second rolling element 6 is in rolling connection between the part to be mounted and the radial supporting part 42, and can be in direct contact with the part to be mounted, or can be mounted on the part to be mounted through the bearing inner ring, and the second rolling element 6 bears radial load and reduces friction loss. The axial stress center of the first rolling element 3 corresponds to the radial range of the radial supporting portion 42, that is, the first rolling element 3 can be closer to the second rolling element 6 (the radial range of the first rolling element is closer) in the radial direction, when the first rolling element 3 bears an axial load, the load can be transferred along the axial direction of the radial supporting portion 42, and the overturning moment of the first rolling element 3 cannot be increased because the axial stress center of the first rolling element 3 is far away from the second rolling element 6, so that the overturning moment of the radial supporting portion 42 caused by the load in the axial direction can be avoided or reduced, the degree of inconsistent abrasion of two ends of the second rolling element 6 can be reduced, and the service life of the composite bearing is finally prolonged.

As shown in fig. 2 to 4 and fig. 7, the first rolling element 3 may be a ball, and a first annular groove 411 for rolling the ball is provided on a surface of the axial support portion 41 facing the first support ring 1, the first annular groove 411 is coaxial with a rotation center of the composite bearing, and a maximum width of the first annular groove 411 is smaller than a diameter of the ball. The rolling path of the balls can be restrained by the first annular groove 411, so that when the balls bear axial load, the stability of the relative positions can be maintained, and the balls are prevented from being broken away from the composite bearing.

As shown in fig. 2 and 3, the first support ring 1 includes a first annular body 11, a face of the first annular body 11 facing the axial support portion 41 is provided with a second annular groove 12 for rolling balls, the second annular groove 12 is coaxial with a rotation center of the composite bearing, a maximum width of the second annular groove 12 is smaller than a diameter of the balls, and widths and diameters of the second annular groove 12 and the first annular groove 411 can be kept uniform. The second annular groove 12 and the first annular groove 411 can jointly restrict the rolling path of the balls, so that when the balls bear axial load, the stability of the relative positions is maintained, and the balls are prevented from being broken away from the composite bearing.

As shown in fig. 2 to 4, the ball retainer comprises a first retainer 2, the first retainer 2 is arranged between axial supporting parts 41 of a first supporting ring 1 and a second supporting ring 4, the first retainer 2 comprises a bottom ring 21, an inner ring 22 and an outer ring 23, the inner ring 22 is connected to the inner diameter side of the bottom ring 21, the outer ring 23 is connected to the outer diameter side of the bottom ring 21, the inner ring 22 and the outer ring 23 form an annular groove with a U-shaped cross section, a plurality of first limiting holes 211 are circumferentially arranged on the bottom ring 21, namely the bottom surface of the annular groove, balls are positioned in the first limiting holes 211, the balls are restrained by the first limiting holes 211, and the diameter of the first limiting holes 211 is smaller than that of the balls, so that the balls can be limited in the U-shaped groove. By restraining the interval between the ball circumferences by the first holder 2, touching between the balls can be avoided, and friction loss and collision and extrusion damage to the balls can be reduced.

As shown in fig. 2 to 4, the bottom ring 21 of the first holder 2 is disposed adjacent to the first support ring 1, and the inner ring 22 and the outer ring 23 extend in the axial direction toward the axial support portion 41 of the second support ring 4, and at this time, the bottom surface of the U-shaped annular groove faces the first support ring 1 and the opening faces the second support ring 4. The first limiting hole 211 for limiting the position of the ball of the first cage 2 is close to the first support ring 1 because of being arranged on the bottom ring 21, at this time, the first limiting hole 211 is positioned at a position far away from the radial support part 42 of the second support ring 4 and bears radial load, and when the radial support part 42 is subjected to radial load runout or vibration, enough moving space can be given to the ball, so that by the arrangement of the structure of the first cage 2, a certain moving margin can be provided on the basis of ensuring that the ball is effectively restrained, and the running stability of the composite bearing is ensured.

As shown in fig. 2 to 3 and fig. 5 to 6, the second rolling element 6 may be a roller, and the axial direction of the roller is the same as the axial direction of the second supporting ring 4. The roller bearing device further comprises a second retainer 5, wherein the rollers are arranged in the second retainer 5, the positions of the rollers are restrained through the second retainer 5, so that the rollers can keep stability of relative positions when bearing radial loads, touch between the rollers can be avoided, and friction loss and collision extrusion damage to the rollers are reduced.

As shown in fig. 2 and 7, the axial supporting portion 41 of the second supporting ring 4 extends in the radial direction to the inner diameter side of the radial supporting portion 42 to form an axial limiting structure 412, after the second cage 5 is mounted inside the second supporting ring 4, the end portion of the second cage 5 can abut against the axial limiting structure 412, the axial position of the second cage 5 is restrained by the axial limiting structure 412, and the second cage 5 and the rollers thereof can not be caused to move in the axial direction when the balls bear the axial load, so that the positional stability of the second cage 5 and the rollers is ensured.

As shown in fig. 3, 5 and 6, the second cage 5 includes a second annular body 51, a plurality of second limiting holes 52 are circumferentially formed in a sidewall of the second annular body 51, each second limiting hole 52 extends in an axial direction, and a roller is mounted in the second limiting hole 52, so that the radial thickness of the second cage 5 should be smaller than the diameter of the roller to ensure that the roller can better perform a rolling supporting function, so that the roller can contact the radial supporting portion 42 of the second supporting ring 4 and can contact the bearing inner ring or a portion to be mounted.

As shown in fig. 5 and 6, the width of the outer diameter surface of the second limiting hole 52 penetrating through the second annular body 51 is smaller than the width of the inner diameter surface of the second limiting hole 52 penetrating through the second annular body 51, and both widths are smaller than the diameters of the rollers, so that the second limiting hole 52 can limit the rollers in the second limiting hole, the positions of the rollers are better restrained, the rollers can be further enabled to be in direct contact with the to-be-mounted part, and a bearing inner ring does not need to be arranged, so that the manufacturing cost of the composite bearing can be reduced.

As shown in fig. 2 and 7, the outer diameter surface of the radial supporting portion 42 of the second supporting ring 4 is provided with a third annular groove 421, and an oil injection hole 422 penetrating the radial supporting portion 42 in the radial direction is provided in the third annular groove 421, and lubricating oil can enter the second supporting ring 4 through the oil injection hole 422 to lubricate the second rolling elements 6. The annular groove 421 is communicated with the oil filling hole 422, after the second support ring 4 is installed, the communication between the oil way and the oil filling hole 422 can be realized as long as the oil way is communicated with the third annular groove 421, so that the inside of the second support ring 4 can be lubricated without locating the position of the oil filling hole 422, and the installation convenience of the second support ring 4 can be improved.

The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.

Claims (10)

1. A composite bearing, characterized in that: including the first back-up ring, first rolling element and the second back-up ring that set up in order along the axial, the second back-up ring includes interconnect's axial supporting part and radial supporting part, axial supporting part extends along radial, radial supporting part extends along the axial, first rolling element roll connection is in first back-up ring with between the axial supporting part, first rolling element is used for bearing axial load, the internal diameter side of radial supporting part is provided with the second rolling element, second rolling element roll connection wait to install the position with between the radial supporting part, the second rolling element is used for bearing radial load, the axial stress center of first rolling element corresponds in the radial scope that radial supporting part is located.

2. The composite bearing of claim 1, wherein: the first rolling bodies adopt balls, and a first annular groove for the balls to roll is formed in one surface of the axial supporting portion, which faces the first supporting ring.

3. A composite bearing according to claim 2, wherein: the first support ring comprises a first annular body, and a second annular groove for the balls to roll is formed in one face of the first annular body facing the axial support part.

4. A composite bearing according to claim 2, wherein: including first holder, first holder sets up first holding ring with between the axial supporting part, first holder includes the foundation ring and connects respectively the inner circle and the outer lane of foundation ring internal diameter side and external diameter side, be provided with a plurality of first spacing holes along circumference on the foundation ring, the ball is located in the first spacing hole, the diameter in first spacing hole is less than the diameter of ball.

5. The composite bearing of claim 4, wherein: the bottom ring is arranged close to the first supporting ring, and the inner ring and the outer ring extend along the axial direction towards the axial supporting part.

6. A composite bearing according to any one of claims 1-5, wherein: the second rolling bodies adopt rollers and further comprise a second retainer, and the rollers are arranged in the second retainer.

7. The composite bearing of claim 6, wherein: the axial supporting part extends along the radial direction to the inner diameter side of the radial supporting part to form an axial limiting structure, and the end part of the second retainer is abutted against the axial limiting structure.

8. The composite bearing of claim 6, wherein: the second retainer comprises a second annular body, a plurality of second limiting holes are formed in the side wall of the second annular body along the circumferential direction, the second limiting holes extend along the axial direction, and the rollers are located in the second limiting holes.

9. The composite bearing of claim 8, wherein: the width of the outer diameter surface of the second annular body, through which the second limiting hole penetrates, is smaller than the width of the inner diameter surface of the second annular body, the two widths are smaller than the diameter of the roller, and the roller is in direct contact with the part to be installed.

10. The composite bearing of claim 1, wherein: the outer diameter surface of the radial supporting part is provided with a third annular groove, and an oil filling hole which radially penetrates through the radial supporting part is arranged in the third annular groove.