阅读说明：本技术 一种轴承 (Bearing ) 是由 侯治亚 董青 高翔 于 2021-09-15 设计创作，主要内容包括：本申请实施例提供一种轴承,包括：密封装置,具有环形结构；外圈,包括与所述密封装置的外环面相接触的密封接触部,在所述轴承的轴向方向上,所述密封接触部的内环面具有弧形结构,且所述密封接触部的内环面的直径由所述外圈的中部向端部逐渐增大后逐渐减小。本申请实施例将外圈与密封装置接触的部位设计成弧形结构密封接触部,并且将所述密封接触部的内环面设计成直径由所述外圈的中部向端部线增加后减小的弧形结构,使得所述密封装置能够在所述轴承工作中,随着所述轴承的内圈的形变弯曲面发生倾斜移动时,始终贴合所述密封接触部的内环面。本申请实施例可以有效提高轴承的密封效果。(An embodiment of the present application provides a bearing, includes: a sealing device having an annular configuration; and the diameter of the inner annular surface of the sealing contact part is gradually reduced after gradually increasing from the middle part of the outer ring to the end part of the outer ring. The position that this application embodiment contacted outer lane and sealing device designs into arc structure sealing contact portion, and will sealing contact portion's interior anchor ring design the diameter by the middle part of outer lane increases the arc structure that reduces after to the tip line, makes sealing device can in bearing work, along with the crooked face of deformation of the inner circle of bearing takes place the inclined movement time, laminates all the time sealing contact portion's interior anchor ring. The embodiment of the application can effectively improve the sealing effect of the bearing.)

1. A bearing, comprising:

a sealing device having an annular configuration;

and the diameter of the inner annular surface of the sealing contact part is gradually reduced after gradually increasing from the middle part of the outer ring to the end part of the outer ring.

2. The bearing of claim 1, wherein the sealing arrangement comprises:

elastic part, set up in sealed contact portion with between the inner circle of bearing, including elastic part body and oil extraction structure, the elastic part body has been seted up and has been held the chamber, the opening orientation that holds the chamber rolling element one side of bearing, the oil extraction structure is fixed in the elastic part body is close to one side of rolling element, and is located open-ended peripheral part, the oil extraction passageway intercommunication of oil extraction structure hold the chamber with the peripheral part of elastic part.

3. The bearing of claim 2, wherein the elastomeric portion body includes an arcuate structural sealing lip abutting the seal contact portion.

4. The bearing of claim 2, wherein the sealing arrangement further comprises:

and a frame support part embedded in the elastic part.

5. The bearing of claim 2, wherein the spring body includes an inner race contact portion abutting the inner race, a contact surface of the inner race contact portion including a cylindrical surface and mating with an outer surface of the inner race.

6. The bearing of claim 2, wherein said oil drainage structure includes at least two oil drainage projections, adjacent oil drainage projections defining said oil drainage passage therebetween.

7. The bearing of claim 2 wherein said oil drainage structure includes an annular oil drain portion, said oil drainage passage opening into said annular oil drain portion.

8. The bearing of any one of claims 1 to 7, wherein the outer ring defines a mounting hole and is open in an axial direction of the outer ring.

Technical Field

The embodiment of the application relates to the technical field of mechanical manufacturing, in particular to a bearing.

Background

A bearing is an important component in mechanical equipment. Its main function is to support the mechanical rotator, reduce the friction coefficient in its motion process and ensure its rotation precision. The double-row angular contact needle bearing is one of bearings and can be used for supporting a main support shaft of a robot gearbox.

Although the double row angular contact needle roller bearing has a negative play structure, when the double row angular contact needle roller bearing is subjected to bending acting force, the relative position between the outer ring and the inner ring of the bearing still changes, and the sealing ring is arranged between the inner ring and the outer ring at the two end parts of the bearing, so that the area where the sealing ring is arranged changes, the contact area between the inner ring and the sealing ring deforms, and the sealing effect is poor.

Therefore, how to improve the effect of bearing sealing becomes a technical problem which needs to be solved urgently.

Content of application

The technical problem solved by the embodiment of the application is how to improve the sealing effect of the bearing.

To solve the above problem, an embodiment of the present application provides a bearing, including:

a sealing device having an annular configuration;

and the diameter of the inner annular surface of the sealing contact part is gradually reduced after gradually increasing from the middle part of the outer ring to the end part of the outer ring.

Optionally, the sealing device comprises:

elastic part, set up in sealed contact portion with between the inner circle of bearing, including elastic part body and oil extraction structure, the elastic part body has been seted up and has been held the chamber, the opening orientation that holds the chamber rolling element one side of bearing, the oil extraction structure is fixed in the elastic part body is close to one side of rolling element, and is located open-ended peripheral part, the oil extraction passageway intercommunication of oil extraction structure hold the chamber with the peripheral part of elastic part.

Optionally, the resilient portion body includes an arcuate structural sealing lip that abuts against the sealing contact portion.

Optionally, the sealing device further comprises:

and a frame support part embedded in the elastic part.

Optionally, the elastic part body includes an inner ring contact portion abutting against the inner ring, and a contact surface of the inner ring contact portion includes a cylindrical surface and matches with an outer surface of the inner ring.

Optionally, the oil discharge structure comprises at least two oil discharge protrusions, and the oil discharge channel is formed between adjacent oil discharge protrusions.

Optionally, the oil discharge structure includes an annular oil discharge portion, and the oil discharge passage is opened in the annular oil discharge portion.

Optionally, the outer ring is provided with a mounting hole, and the mounting hole is conducted along the axial direction of the outer ring.

Compared with the prior art, the technical scheme of the embodiment of the application has the following advantages:

in the bearing provided by the embodiment of the application, the outer ring and the sealing contact part contacted with the sealing device are arranged to be of an arc structure, the diameter of the inner ring surface of the sealing contact part is gradually reduced from the middle part of the outer ring to the end part of the outer ring, when the inner ring of the bearing is in the working process of the bearing, the surface contacted with the sealing device of the inner ring is bent due to the action of a large bending moment, and when the space between the inner ring and the outer ring where the sealing device is positioned is enlarged on one side of the inner ring subjected to the bending action force, the radian of the inner ring surface of the sealing contact part is matched with the radian of the deformed curved surface of the inner ring, so that when the sealing device moves along with the deformed curved surface of the inner ring, the outer ring surface of the sealing device moves along the radian of the inner ring surface of the sealing contact part, therefore, the outer ring surface of the sealing device can be always attached to the sealing contact part to move, the sealing effect of the bearing is effectively improved, and the service life of the bearing is prolonged.

In an alternative aspect, a bearing provided in an embodiment of the present application, the sealing device includes: elastic part, set up in sealed contact portion with between the inner circle of bearing, including elastic part body and oil extraction structure, the elastic part body has been seted up and has been held the chamber, the opening orientation that holds the chamber rolling element one side of bearing, the oil extraction structure is fixed in the elastic part body is close to one side of rolling element, and is located open-ended peripheral part, the oil extraction passageway intercommunication of oil extraction structure hold the chamber with the peripheral part of elastic part. Like this, through the elastic part body is close to one side of rolling element has set up the oil extraction structure, can make the lubricating oil that gets into and hold the intracavity return to the position at rolling element place once more through the oil extraction structure, guarantees the lubricated effect of bearing, can reduce the lubricating oil that flows between sealing device and the outer lane simultaneously, reduces sealing device's sealing pressure, improves sealed effect.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a bearing provided in an embodiment of the present application;

fig. 2 is a schematic view of the structure of the sealing device shown in fig. 1.

Wherein: 1-an outer ring; 11-a sealing contact; 2-sealing means; 21-an elastic portion; 22-a carcass support; 211-an elastic part body; 212-oil drain structure; 2111-a receiving cavity; 2112-arc-shaped structural seal lip; 2113-inner race contact; 2121-oil drain bulge; 3-mounting holes; 4-inner ring; 5-rolling element.

Detailed Description

As can be seen from the background art, the sealing effect of the bearing is poor.

In the working engineering of the bearing, the inner ring of the bearing is deformed under the action of a large bending moment, so that the surface of the inner ring contacted with the sealing device is bent, and the space between the inner ring and the outer ring where the sealing device is located is enlarged on one side of the inner ring subjected to the bending action force, so that the sealing device moves towards the end part of the bearing along the axial direction of the bearing, and finally the sealing effect of the bearing is poor.

In order to improve the sealing effect of the bearing, the embodiments of the present application provide a bearing, and the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the indication of the direction or the positional relationship referred to in the present specification is based on the direction or the positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and it is not intended to indicate or imply that the indicated device must have a specific direction, be configured in a specific direction, and thus, should not be construed as limiting the present application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a bearing provided in an embodiment of the present application.

As shown in fig. 1, a bearing provided by an embodiment of the present application includes:

a sealing device 2 having an annular configuration; and the outer ring 1 comprises a sealing contact part 11 which is in contact with the outer ring surface of the sealing device 2, the inner ring surface of the sealing contact part 11 has an arc-shaped structure in the axial direction of the bearing, and the diameter of the inner ring surface of the sealing contact part 11 is gradually reduced after gradually increasing from the middle part to the end part of the outer ring 1.

Of course, the bearing may also be other structures that are less relevant to the main solution of the present application, such as: an inner ring 4, and rolling elements 5, such as roller-type rolling elements shown in the figure.

In addition, it should be noted that the radian of the arc-shaped structure of the sealing contact portion 11 can be obtained by detecting a deformation result generated by a change in the surface structure of the inner ring 4 in an actual working process of the bearing, so that the obtained radian of the arc-shaped structure of the sealing contact portion 11 can be matched with a complete deformation of the inner ring, and a sealing effect can be better achieved; of course, in other embodiments, the information may be obtained in other manners, such as: the bending deformation of the inner ring is predicted by means of modeling and is used for the design of the arc structure of the seal contact portion 11.

It will be readily appreciated that the axial direction of the bearing is indicated by the arrow R in figure 1.

In the work engineering of bearing, the inner circle 4 of bearing receives great moment of flexure effect can take place to warp, makes the inner circle 4 with the surface bending of sealing device 2 contact, and in the one side that inner circle 4 received the bending effort, the space grow between inner circle 4 and the outer lane 1 that sealing device 2 belongs to causes sealing device 2 moves to the tip of bearing along the axial of bearing, because this application the bearing have the sealed contact portion 11 of arc structure for the space that sealing device 2 belongs to can not produce too big change, sealing device 2 still can keep the sealed to the space between inner circle 4 and outer lane 1.

It can be seen that, the bearing that this application embodiment provided, sealing device 2 is including the sealed contact site 11 that has the arc structure to can receive moment of flexure effect when can take place to warp at inner circle 4, still with sealed contact site 11 laminating contact, thereby can guarantee sealing device 2's sealed effect, effectively improve the sealed effect of bearing.

In order to facilitate the installation of the bearing, in an embodiment, please refer to fig. 1, the outer ring 1 is provided with an installation hole 3, and the installation hole is conducted along an axial direction (shown as an R direction in the figure) of the outer ring 1.

The mounting hole 3 switches on along axial direction R, can make things convenient for the control to the installation dynamics when the bearing installation like this, of course, the quantity of mounting hole 3 can be according to actual need evenly set up on the circumferencial direction that can follow outer lane 1 on the outer lane 1, as long as make things convenient for the installation of bearing can.

In addition, in the embodiment disclosed in the present application, in order to facilitate the machining of the mounting hole 3, the shape of the mounting hole may be made cylindrical. In other embodiments, the shape of the mounting hole 3 may also be set according to needs, and is not described herein.

However, during the operation of the bearing, the lubricant at the rolling elements 5 of the bearing may flow toward the sealing device 2, increasing the pressure of the lip of the sealing device 2 in the axial direction R of the bearing, thereby increasing the speed at which the sealing device 2 moves outward along with the deformed curved surface of the inner ring 4, further increasing the gap between the sealing device 2 and the inner ring 4 and the outer ring 1, and reducing the sealing effect of the sealing device 2.

In order to further improve the sealing effect of the bearing, an embodiment of the present application further provides a bearing, please refer to fig. 2, and fig. 2 is a schematic structural diagram of a sealing device of the bearing shown in fig. 1.

As shown in fig. 2, the sealing device 2 of the bearing provided by the embodiment of the present application includes:

the elastic part 21 is arranged between the seal contact part 11 and the inner ring 4 of the bearing, and comprises an elastic part body 211 and an oil discharge structure 212, wherein the elastic part body 211 is provided with an accommodating cavity 2111, the opening of the accommodating cavity 2111 faces the rolling element 5 side of the bearing, the oil discharge structure 212 is fixed on one side of the elastic part body 211 close to the rolling element 5 and is located at the peripheral part of the opening, and an oil discharge channel of the oil discharge structure 212 is communicated with the accommodating cavity 2111 and the peripheral part of the elastic part 21.

The outer peripheral portion of the opening is a portion located on the outer periphery of the opening in the radial direction of the bearing; the outer peripheral portion of the elastic portion 21 is a space surrounded by the elastic portion 21 and the outer ring 1.

Therefore, in the embodiment of the present application, an oil drainage structure 212 is designed on the elastic portion 21 of the sealing device 2, and according to the characteristics during the bearing movement, the oil drainage structure 212 is disposed on the outer peripheral portion of the opening on the side of the elastic portion body 211 close to the rolling elements 5, and an oil drainage channel of the oil drainage structure 212 communicates the accommodation chamber 2111 and the outer peripheral portion of the elastic portion 21.

Thus, when the sealing device 2 moves along with the bearing in the working process, the lip of the elastic part 21 rotates, the oil discharge structure 212 is disposed on the side of the elastic part body 211 close to the rolling body 5 and located on the outer peripheral part of the opening, and the oil discharge channel of the oil discharge structure 212 communicates the accommodating cavity 2111 and the outer peripheral part of the elastic part 21, so that the lubricating oil leaked out from the inside of the bearing to the outside can be discharged from the accommodating cavity 2111 to the inside of the bearing through the oil discharge channel, the sealing pressure of the lip of the elastic part 21 is reduced, the sealing device 2 cannot be in contact with the outer ring 1 and the inner ring 4 tightly due to the pressure caused by the lubricating oil leaked out from the inside of the bearing in the moving process, and the sealing effect of the bearing is further enhanced.

The material of the elastic part 21 may be rubber or other materials with elastic function, so as to ensure that the sealing device 2 is always in contact with the outer ring 1 and the inner ring 4 of the bearing under the action of elastic force, thereby ensuring the sealing effect of the sealing device 2.

To reduce the pressure at the lip of the sealing device 2 and reduce the difficulty of manufacturing the oil drainage structure, in one embodiment, please refer to fig. 2, wherein the oil drainage structure 212 includes at least two oil drainage protrusions 2121, and the oil drainage channel is formed between adjacent oil drainage protrusions 2121.

Specifically, the oil drain bosses 2121 may be uniformly distributed in the circumferential direction of the sealing device 2.

The oil discharge channel formed by the adjacent oil discharge protrusions 2121 can discharge the lubricating oil which is leaked from the inside to the accommodating cavity 2111 when the bearing works to the inside of the bearing again, so that the sealing pressure at the lip of the sealing device 2 is reduced, the sealing device 2 is prevented from moving outwards more seriously, the sealing performance of the sealing device 2 is enhanced, the sealing effect of the bearing is improved, the processing difficulty is low, and the used materials are less.

Thus, the oil drainage channel between the adjacent oil drainage protrusions 2121 is an oil drainage groove, so that the lubricating oil can be drained from the opening of the oil drainage groove to the inside of the bearing, and oil drainage is more convenient.

Of course, the width of the oil drainage groove can be changed according to the number of the oil drainage protrusions 2121, the design is flexible, and the number and the width of the oil drainage groove can be adaptively designed according to the actual condition of the bearing.

In addition, in an embodiment, in order to facilitate processing of the oil drainage channel, the oil drainage structure 212 may further include an annular oil drainage portion, and the oil drainage channel is opened in the annular oil drainage portion.

Specifically, the oil discharge passage includes an oil discharge hole communicating the accommodation chamber 2111 and the seal contact portion 11 in the radial direction of the bearing.

The radial direction is indicated by arrow a in fig. 2.

In order to ensure that the sealing device 2 can better fit the sealing contact portion 11, in an embodiment, please refer to fig. 2, the elastic portion body 211 includes an arc-shaped sealing lip 212, and the arc-shaped sealing lip 212 abuts against the sealing contact portion 11.

Elastic part body 211 includes arc structure seal lip 212, and arc structure seal lip 212 is less with sealing contact portion 11's contact surface, and the laminating degree is better, and in the bearing course of operation, along with elastic part 2's rotation, arc structure seal lip 212 also more easily with sealing contact portion 11 keeps laminating contact, thereby can guarantee sealing device 2 laminates in the course of operation of bearing sealing contact portion 11 guarantees the sealed effect of bearing.

In order to facilitate the elastic portion 21 to better fit to the outer ring and the inner ring 4, in an embodiment, please refer to fig. 2, the sealing device 2 further includes a frame support portion 22 embedded in the elastic portion 21, so that the elastic portion 21 can be supported by the frame support portion 22, the rigidity of the elastic portion 21 is improved, and the sealing effect of the elastic portion is ensured.

Of course, the specific structure of the frame support 22 can be selected as desired, such as: the framework supporting part 22 can be designed to only support the part except the arc-shaped structure sealing lip 212, so that the arc-shaped structure sealing lip 212 can better exert the elastic performance, and the sealing device 2 can be always attached to the sealing contact part 11 of the outer ring 1; or the skeleton supporting portion 22 may be disposed only at a portion of the elastic portion body 211 contacting the inner ring 4 and at a side opposite to the opening of the accommodating cavity 2111, so as to ensure that the elastic portion 21 is supported to be attached to the outer ring 1 and the inner ring 4.

However, when the inner ring 4 of the bearing is deformed due to a large bending moment, a gap may be generated between the sealing device 2 and the inner ring 4, which may cause a situation that the sealing effect of the sealing device 2 is reduced, and in order to further enhance the sealing effect of the sealing device 2, in an embodiment, referring to fig. 2, the elastic portion body 211 includes an inner ring contact portion 2113 abutting against the inner ring 4, and a contact surface of the inner ring contact portion 2113 includes a cylindrical surface and matches with an outer surface of the inner ring 4.

Therefore, the inner ring contact portion 2113 is designed to be a cylindrical surface contact surface matched with the outer surface of the inner ring, and when the sealing device 2 moves along with the deformation of the inner ring 4 in the working process of the bearing, although a gap is generated between the inner ring 4 and a portion of the inner ring contact portion 2113 corresponding to the structure of the inner ring 4 which is subjected to bending deformation, the portion corresponding to the structure of the inner ring 4 which is not subjected to bending deformation is still abutted against the inner ring 4, so that the attachment between the inner ring 4 and the sealing device 2 can be ensured, the sealing effect of the sealing device 2 is ensured, and the sealing effect of the bearing is improved.

Although the embodiments of the present application are disclosed above, the present application is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present disclosure, and it is intended that the scope of the present disclosure be defined by the appended claims.