CN219413250U

CN219413250U - Bidirectional bearing

Info

Publication number: CN219413250U
Application number: CN202223600020.1U
Authority: CN
Inventors: 朱耀辉
Original assignee: Guangzhou Boda Boju Technology Co ltd
Current assignee: Guangzhou Boda Boju Technology Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-07-25
Anticipated expiration: 2032-12-29

Abstract

The present application relates to a bi-directional bearing. The bidirectional bearing comprises an outer ring, an inner ring, a retainer and a plurality of rolling bodies, wherein the outer ring is coaxially arranged with the inner ring, the outer ring is arranged on the outer periphery side of the inner ring, the retainer is arranged between the outer ring and the inner ring, a storage groove is formed in the retainer, a first groove is formed in the inner peripheral surface of the outer ring, an annular rolling surface is formed in at least part of the outer peripheral surface of the inner ring, the rolling surfaces are equal in distance between the axes of the inner ring, and the rolling bodies penetrate through the storage groove and are respectively contacted with the first groove and the rolling surface. The bidirectional bearing can realize radial rotation of the inner ring relative to the outer ring and axial linear movement of the inner ring relative to the outer ring.

Description

Bidirectional bearing

Technical Field

The application relates to the technical field of bearings, in particular to a bidirectional bearing.

Background

In the related art, a bearing is generally composed of an outer ring, an inner ring, a cage, and balls, and ball grooves corresponding to the balls are provided on both the inner peripheral surface of the outer ring and the outer peripheral surface of the inner ring, so that the balls can roll in the ball grooves, thereby enabling radial rotation of the inner ring relative to the outer ring. Obviously, the bearing in the related art has a problem of a single moving direction.

Disclosure of Invention

The present application is directed to a bidirectional bearing, which solves the technical problems in the related art.

According to a first aspect of the present application, there is provided a bidirectional bearing, comprising an outer ring, an inner ring, a retainer and a plurality of rolling bodies, wherein the outer ring and the inner ring are coaxially arranged and the outer ring is positioned on the outer periphery side of the inner ring, the retainer is arranged between the outer ring and the inner ring, a storage groove is formed in the retainer, a first groove is formed in the inner peripheral surface of the outer ring, an annular rolling surface is formed at least in part on the outer peripheral surface of the inner ring, and the rolling bodies penetrate through the storage groove and are respectively contacted with the first groove and the rolling surface.

Optionally, the first grooves are annular, the number of the first grooves and the number of the retainers are at least two, the at least two first grooves are arranged at intervals along the axial direction of the outer ring, and each retainer corresponds to one first groove.

Optionally, the first groove is an arc groove matched with the rolling body.

Optionally, the outer peripheral surface of the inner ring forms two protruding portions, the two protruding portions are respectively arranged at two ends of the axial direction of the inner ring, and the retainer and the rolling body are arranged between the two protruding portions.

Optionally, the protruding portion is an annular structure.

Optionally, the height of the protruding portion is smaller than the diameter of the rolling body by taking the rolling surface as a reference surface.

Optionally, the distance between the rolling surface and the axis of the inner ring is equal everywhere.

Optionally, the length of the outer ring along the axial direction of the inner ring is smaller than the length of the inner ring along the axial direction of the inner ring.

Optionally, the rolling bodies comprise balls.

According to a second aspect of the present application, there is provided a bidirectional bearing, comprising an outer ring, an inner ring, a retainer and a plurality of rolling elements, wherein the outer ring and the inner ring are coaxially arranged and the outer ring is positioned on the outer periphery side of the inner ring, the retainer is arranged between the outer ring and the inner ring, a storage groove is formed in the retainer, a first groove is formed in the outer peripheral surface of the inner ring, an annular rolling surface is formed at least in part on the inner peripheral surface of the outer ring, and the rolling elements penetrate through the storage groove and are respectively contacted with the first groove and the rolling surface.

The rolling element is arranged between the outer ring and the inner ring, and a part of the rolling element is positioned in the first groove, so that the inner ring can radially rotate relative to the outer ring, and in addition, the outer circumferential surface of the inner ring is provided with a rolling surface suitable for rolling of the rolling element, so that rolling friction is generated when the rolling element is opposite to the inner ring under the action of external force, and the inner ring can axially and linearly move relative to the outer ring.

Additional features and advantages of the present application will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate the application and, together with the description, do not limit the application. In the drawings:

FIG. 1 is a schematic structural view of a bi-directional bearing provided in an exemplary embodiment of the present application;

FIG. 2 is a schematic view of another view of FIG. 1;

FIG. 3 is a cross-sectional view taken along the direction A-A in FIG. 2;

FIG. 4 is a cross-sectional view taken along the direction B-B in FIG. 2;

fig. 5 is a schematic structural view of a bidirectional bearing according to an exemplary embodiment of the present application, in which an outer ring is not shown;

FIG. 6 is a schematic view of another view of FIG. 5;

fig. 7 is a schematic structural view of an outer ring of a bidirectional bearing according to an exemplary embodiment of the present application.

Description of the reference numerals

10-an outer ring; 11-a first groove; 20-an inner ring; 21-rolling surface; 211-a second groove; 22-a boss; 30-a retainer; 40-rolling bodies.

Detailed Description

The following detailed description of specific embodiments of the present application refers to the accompanying drawings. It should be understood that the detailed description is presented herein for purposes of illustration and explanation only and is not intended to limit the present application.

In this application, unless otherwise indicated, the terms "upper and lower" refer to the orientation or positional relationship in which a product is conventionally placed in use, and may be understood as upper and lower along the direction of gravity, which also correspond to "upper and lower" in the drawings. In addition, it should be noted that terms such as "first", "second", etc. are used to distinguish one element from another element without order or importance.

As shown in fig. 1, 2 and 3, according to a first aspect of the present application, there is provided a bidirectional bearing including an outer race 10, an inner race 20, a cage 30 and a plurality of rolling elements 40.

The outer ring 10 and the inner ring 20 are coaxially arranged, the outer ring 10 is positioned on the outer circumference side of the inner ring 20, the retainer 30 is arranged between the outer ring 10 and the inner ring 20, the retainer 30 is sleeved on the outer circumference side of the inner ring 20 and is positioned on the inner circumference side of the outer ring 10, a containing groove is formed in the retainer 30, the diameter of the containing groove is equal to that of the rolling element 40, the inner circumference surface of the outer ring 10 is provided with a first groove 11, the outer circumference surface of the inner ring 20 at least partially forms an annular rolling surface 21, the rolling surface 21 is an annular surface, namely, the rolling surface 21 extends around the circumference of the inner ring 20 and extends along the axis direction parallel to the inner ring 20, the rolling element 40 penetrates through the containing groove and is respectively contacted with the first groove 11 and the rolling surface 21, at this time, wherein the rolling element 40 is contacted with the first groove 11, namely, at least part of the rolling element 40 stretches into the first groove 11 and is contacted with the first groove 11, namely, the rolling element 40 can be contacted with the inner surface of the first groove 11, and the rolling element 40 is suitable for rolling on the rolling surface 21.

Since the rolling elements 40 are located between the outer ring 10 and the inner ring 20 and a part of the rolling elements 40 is located in the first groove 11, the inner ring 20 can rotate radially relative to the outer ring 10, and furthermore, since the outer circumferential surface of the inner ring 20 is provided with the rolling surface 21 suitable for the rolling elements 40 to roll, under the action of external force, when the rolling elements 40 generate rolling friction relative to the inner ring 20, the inner ring 20 can do axial linear motion relative to the outer ring 10, and in sum, the bidirectional bearing in the application can realize the radial rotation of the inner ring 20 and also realize the axial linear motion of the inner ring 20.

As shown in fig. 4, in the embodiment of the present application, the first grooves 11 are annular, that is, the first grooves 11 located on the inner circumferential surface of the outer ring 10 are disposed around a circumference of the inner circumferential surface of the outer ring 10, and the number of the first grooves 11 and the holders 30 is at least two, respectively, at least two first grooves 11 are disposed at intervals along the axial direction of the outer ring 10, each holder 30 corresponds to one first groove 11, where the rolling elements 40 located in one holder 30 are defined as one rolling element 40, and the number of one rolling element 40 includes two or more, by using two or more first grooves 11, two or more rolling elements 40, the inner ring 20 can be prevented from being offset in the radial direction thereof, which is beneficial to improving the motion precision of the bidirectional bearing and making the stability thereof better.

As shown in fig. 4 and 7, in the embodiment of the present application, the first groove 11 is an arc groove matched with the rolling element 40, where the rolling element 40 is spherical, and the arc groove has an arc surface and can be matched with the spherical rolling element 40, so that the rolling element 40 can roll in the first groove 11.

As shown in fig. 4 and 5, in the embodiment of the present application, two protrusions 22 are formed on the outer circumferential surface of the inner ring 20, the protrusions 22 extend toward the axial direction far away from the inner ring 20, and the two protrusions 22 are respectively disposed at two ends of the axial direction of the inner ring 20, so that a thickness difference can be formed on the outer circumferential surface of the inner ring 20, and the thickness at the two ends of the inner ring 20 is greater than that at the middle position of the inner ring 20, and since the two protrusions 22 are respectively disposed at two ends of the inner ring 20, a certain distance can be formed between the two protrusions 22, and the cage 30 and the rolling body 40 are disposed between the two protrusions 22, and by disposing the protrusions 22 at the two ends of the inner ring 20, the rolling body 40 and the cage 30 can be limited, so that the inner ring 20 and the outer ring 10 can be prevented from being separated from each other.

In some embodiments, the protruding portions 22 may also be provided on the outer ring 10 and extend toward the axial direction of the inner ring 20, and the protruding portions 22 are distributed at both ends of the outer ring 10.

In some embodiments, the boss 22 may be further provided on the inner ring 20 and the outer ring 10, respectively, for example, the boss 22 is provided at one end of the inner ring 20 and the boss 22 is provided at an end of the outer ring 10 corresponding to the other end of the inner ring 20, which may also prevent the inner ring 20 and the outer ring 10 from being separated from each other.

Wherein the number of bosses 22 may be set as desired. For example, the number of the protrusions 22 may be two, one of the protrusions 22 being provided at one end of the inner ring 20 and the other protrusion 22 being provided at the other end of the inner ring 20, in which case the protrusions 22 are of a ring-shaped structure, that is, the protrusions 22 are of a continuous structure and are provided around a circumference of the inner ring 20.

In some embodiments, the protruding portion 22 may be provided in a non-annular structure, for example, a plurality of protruding portions 22 may be provided at one end of the inner ring 20, each two adjacent protruding portions 22 are disposed at intervals, and the plurality of protruding portions 22 are uniformly distributed around the outer peripheral surface of the inner ring 20, that is, the plurality of protruding portions 22 are distributed at intervals along the outer peripheral surface of the inner ring 20, so that the cage 30 and the rolling elements 40 can be limited, thereby preventing the inner ring 20 and the outer ring 10 from being separated from each other.

In the embodiment of the application, the rolling surface 21 is taken as a reference surface, and the height of the protruding portion 22 relative to the rolling surface 21 is smaller than the diameter of the rolling body 40, so that a certain gap can be formed between the protruding portion 22 and the end portion of the outer ring 10, and therefore lubricating oil can be conveniently injected into the rolling body 40 and the retainer 30 in the subsequent use process, and the inner ring 20 and the outer ring 10 can be conveniently assembled with each other.

As shown in fig. 6, in the embodiment of the present application, the protruding portion 22 may be formed in various manners, for example, a groove may be formed in a middle position of the outer circumferential surface of the inner ring 20, and since the groove portion is concave downward with respect to the axial direction of the inner ring 20, the protruding portion 22 is formed upward at both ends of the inner ring 20, thereby forming the second groove 211, in other words, the protruding portion 22 and the inner ring 20 may be formed as an integral structure. Also, for example, the boss 22 may be fixed to the outer peripheral surface of the inner ring 20 by welding.

In the embodiment of the present application, the distances between the rolling surface 21 and the axis of the inner ring 20 are equal, the rolling surface 21 itself is an annular surface, and when the rolling surface 21 is unfolded along the radial direction of the rolling surface 21, the unfolded rolling surface 21 forms a rectangle due to the equal distances between the rolling surface 21 and the axis of the inner ring 20. In other words, along the radial direction of the inner ring 20, the longitudinal section of the outer peripheral surface of the inner ring 20 is a straight line parallel to the axial direction of the inner ring 20, so that the rolling elements 40 can smoothly slide on the rolling surface 21, thereby achieving radial rotation of the inner ring 20 relative to the outer ring 10.

In the embodiment of the present application, the length of the outer ring 10 along the axial direction of the inner ring 20 is smaller than the length of the inner ring 20 along the axial direction of the inner ring 20, so that the movement distance of the inner ring 20 along the axial direction can be determined according to different requirements, and it can be understood that when the length of the outer ring 10 along the axial direction of the inner ring 20 is relatively smaller and the length of the inner ring 20 along the axial direction of the inner ring 20 is relatively larger, the movement distance of the inner ring 20 along the axial direction of the inner ring 20 is larger.

In embodiments of the present application, the rolling elements 40 may be balls, which may be steel balls, and in some embodiments, ceramic balls.

According to a second aspect of the present application, there is provided a bidirectional bearing comprising an outer ring 10, an inner ring 20, a cage 30 and a plurality of rolling elements 40, the outer ring 10 and the inner ring 20 being coaxially arranged and the outer ring 10 being located on the outer peripheral side of the inner ring 20, the cage 30 being arranged between the outer ring 10 and the inner ring 20, the cage 30 being provided with a receiving groove, the outer peripheral surface of the inner ring 20 being provided with a first groove 11, the inner peripheral surface of the outer ring 10 at least partially forming an annular rolling surface 21, the rolling surfaces 21 being equidistant from the axis of the inner ring 20, the rolling elements 40 being threaded through the receiving groove and being in contact with the first groove 11 and the rolling surface 21, respectively.

Unlike the bidirectional bearing provided in the first aspect of the present application, the bidirectional bearing provided in the second aspect of the present application, the first groove 11 is provided on the outer circumferential surface of the inner ring 20, and the rolling surface 21 is provided on the inner circumferential surface of the outer ring 10.

By the above-described configuration, the inner race 20 can be made to perform radial rotational movement and axial linear movement with respect to the outer race 10.

The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application. In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in detail.

Moreover, any combination of the various embodiments of the present application may be made, as long as it does not depart from the spirit of the present application, which should also be construed as the subject matter of the present application.

Claims

1. The bidirectional bearing is characterized by comprising an outer ring, an inner ring, a retainer and a plurality of rolling bodies, wherein the outer ring and the inner ring are coaxially arranged, the outer ring is positioned on the outer periphery side of the inner ring, the retainer is arranged between the outer ring and the inner ring, a storage groove is formed in the retainer, a first groove is formed in the inner peripheral surface of the outer ring, an annular rolling surface is formed in at least part of the outer peripheral surface of the inner ring, and the rolling bodies penetrate through the storage groove and are respectively contacted with the first groove and the rolling surface.

2. The bidirectional bearing according to claim 1, wherein the first grooves are annular, the number of the first grooves and the number of the retainers are at least two, the at least two first grooves are arranged at intervals along the axial direction of the outer ring, and each retainer corresponds to one first groove.

3. A bi-directional bearing according to claim 1 or 2, wherein the first recess is an arcuate recess cooperating with the rolling element.

4. The bidirectional bearing according to claim 1, wherein the outer peripheral surface of the inner ring forms two protruding portions, the two protruding portions are provided at both ends in the axial direction of the inner ring, respectively, and the cage and the rolling elements are located between the two protruding portions.

5. The bi-directional bearing of claim 4, wherein the boss is an annular structure.

6. The bidirectional bearing according to claim 4, wherein a height of the protruding portion with respect to the rolling surface is smaller than a diameter of the rolling element with respect to the rolling surface as a reference surface.

7. The bi-directional bearing of claim 1 wherein the rolling surface is equidistant from the axis of the inner race throughout.

8. The bidirectional bearing according to claim 1, wherein a length of the outer ring in an axial direction of the inner ring is smaller than a length of the inner ring in the axial direction of the inner ring.

9. The bi-directional bearing of claim 1 wherein said rolling elements comprise balls.

10. The bidirectional bearing is characterized by comprising an outer ring, an inner ring, a retainer and a plurality of rolling bodies, wherein the outer ring and the inner ring are coaxially arranged, the outer ring is positioned on the outer periphery side of the inner ring, the retainer is arranged between the outer ring and the inner ring, a storage groove is formed in the retainer, a first groove is formed in the outer periphery of the inner ring, an annular rolling surface is formed in at least part of the inner periphery of the outer ring, and the rolling bodies penetrate through the storage groove and are respectively contacted with the first groove and the rolling surface.