CN113280047B

CN113280047B - Composite bearing structure

Info

Publication number: CN113280047B
Application number: CN202010100827.5A
Authority: CN
Inventors: 黄江城
Original assignee: Risun Expanse Corp
Current assignee: Risun Expanse Corp
Priority date: 2020-02-19
Filing date: 2020-02-19
Publication date: 2022-10-25
Anticipated expiration: 2040-02-19
Also published as: CN113280047A

Abstract

A composite bearing structure is used for accommodating an axle center; the composite bearing structure comprises a shaft sleeve, a bearing and a first flow resisting part; the shaft sleeve is provided with an accommodating space; the bearing is arranged in the accommodating space of the shaft sleeve and is provided with a shaft hole; the shaft hole is used for accommodating the shaft center; the bearing and the shaft sleeve form a cavity; the cavity is communicated with the shaft hole; the first flow choking piece is arranged in the cavity and sleeved with the bearing. According to the invention, the first flow resisting piece is arranged in the cavity and sleeved on the bearing, so that the flow path length of the lubricating oil in the cavity can be effectively increased, and the lubricating oil is not easy to leak out from a tiny gap between the shaft sleeve and the bearing.

Description

Composite bearing structure

Technical Field

The invention relates to a composite bearing structure, in particular to a composite bearing structure with a flow resisting part.

Background

In mechanical structures, rotating elements are often used to transmit power or to change shape. In order to make the element rotate smoothly, a bearing structure is usually used to support the rotating element, and lubricating oil is injected between the bearing structure and the rotating element to reduce the friction force generated when the rotating element rotates in the bearing structure.

However, the friction between the rotating element and the bearing structure is converted into heat energy, and once the lubricating oil is heated, the fluidity of the lubricating oil is increased, so that the lubricating oil is easily leaked out from the gap of the bearing structure, and the lubricating oil between the rotating element and the bearing structure is easily insufficient, thereby failing to effectively reduce the friction generated when the rotating element rotates in the bearing structure. In addition, various miniaturized bearing structures have been proposed to meet the technological development. These miniaturized bearing structures can store a smaller amount of lubricating oil because of their smaller overall size. The lubricating oil which is stored less is more likely to increase its fluidity by heating, which leads to a more ineffective reduction of the friction between the rotating element and the bearing structure, and even severely reduces the service life of the rotating element.

Disclosure of Invention

The present invention provides a composite bearing structure to solve the problem of the prior art that the lubricant is easy to leak from the gap of the composite bearing structure.

The technical problem to be solved by the invention is realized by the following technical scheme:

the composite bearing structure disclosed in one embodiment of the present invention is used for accommodating an axis. The composite bearing structure comprises a shaft sleeve, a bearing and a first flow resisting part. The shaft sleeve is provided with an accommodating space. The bearing is arranged in the accommodating space of the shaft sleeve and is provided with a shaft hole. The shaft hole is used for accommodating the shaft center. The bearing and the shaft sleeve form a chamber. The chamber is communicated with the shaft hole. The first flow choking piece is arranged in the cavity and sleeved with the bearing.

In other words, the present invention provides a composite bearing structure for accommodating a shaft, the composite bearing structure comprising:

a shaft sleeve with a containing space;

the bearing is arranged in the accommodating space of the shaft sleeve and provided with a shaft hole for accommodating the shaft center, the bearing and the shaft sleeve form a cavity, and the cavity is communicated with the shaft hole; and

the first flow choking piece is arranged in the cavity and sleeved with the bearing.

The two bearings are communicated with each other, each of the two bearings comprises a main body part and a side part, the two main body parts are arranged between the two side parts, the two side parts are tightly matched and arranged on the shaft sleeve, and the main body part of the bearing is sleeved with the first flow choking piece.

The bearing comprises a main body part and a side part, wherein the side part is arranged at one end of the main body part, the main body part is positioned between the shaft sleeve and the side part, the side part is tightly matched with the shaft sleeve, and the main body part of the bearing is sleeved with the first flow choking piece.

The composite bearing structure further comprises a second flow blocking piece, wherein the second flow blocking piece is arranged in the cavity and sleeved on the main body part, and the outer diameter of the second flow blocking piece is smaller than that of the first flow blocking piece.

The first spoiler has at least one first notch, the second spoiler has at least one second notch, and the at least one first notch and the at least one second notch are staggered.

The at least one first slot is located at the inner edge of the first spoiler, and the at least one second slot is located at the inner edge of the second spoiler.

The composite bearing structure further comprises an anti-vibration structure, wherein the anti-vibration structure is arranged between the shaft sleeve and the main body part, the anti-vibration structure comprises a central part and an outer peripheral part, the outer peripheral part surrounds the central part, the central part protrudes out of the outer peripheral part, and one side of the central part facing the shaft sleeve is provided with a recess.

The first spoiler has a first edge and a second edge at an outer edge, the first edge connects to the second edge, and a shortest distance from the first edge to a center point of the first spoiler is smaller than a shortest distance from the second edge to the center point of the first spoiler.

The first flow resisting piece is of a spiral structure.

The shaft sleeve comprises a side wall and a seat part, wherein the side wall is erected on the seat part and surrounds the accommodating space.

According to the composite bearing structure disclosed in the above embodiments, the first flow blocking element is disposed in the cavity and sleeved on the bearing. Therefore, the first flow blocking piece can effectively increase the flow path length of the lubricating oil in the cavity, so that the lubricating oil is not easy to leak out from a tiny gap between the shaft sleeve and the bearing.

The foregoing description of the present disclosure and the following description of the embodiments are provided to illustrate and explain the principles of the present disclosure and to provide further explanation of the scope of the disclosure.

Drawings

FIG. 1 is a perspective view of a composite bearing structure according to an embodiment of the invention;

FIG. 2 is an exploded view of the composite bearing structure of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the composite bearing structure of FIG. 1;

FIG. 4 is an exploded view of a composite bearing structure according to another embodiment of the present invention;

FIG. 5 is a cross-sectional view of the composite bearing structure of FIG. 4;

FIG. 6 is a schematic perspective view of a composite bearing structure according to yet another embodiment of the invention;

FIG. 7 is an exploded view of the composite bearing structure of FIG. 6;

FIG. 8 is a cross-sectional view of the composite bearing structure of FIG. 6;

FIG. 9 is an exploded view of a composite bearing structure according to another embodiment of the invention;

FIG. 10 is a cross-sectional view of the composite bearing structure of FIG. 9;

FIG. 11 is an exploded view of a composite bearing structure according to yet another embodiment of the invention;

FIG. 12 is a cross-sectional view of the composite bearing structure of FIG. 11.

[ description of reference ]

10a, 10b, 10c, 10d, 10e composite bearing structure

100a, 100b, 100c, 100d axle sleeve

101a, 101c accommodating space

110a, 110b, 110c, 110d, 110e side wall

120a, 120b seat

200a, 200b, 200c, 200d bearing

201a, 201c axle hole

210a, 210b, 210c, 210d main body section

220a, 220b, 220c, 220d side portions

300a, 300b, 300c, 300d, 300e first spoiler

301a, 301e first slot

310e first side

320e second side

400a, 400e second spoiler

401a, 401e second slot

500a shockproof structure

510a center section

511a recess

520a outer peripheral portion

600a shim

601a first side

602a second side

C chamber

C1 First oil storage space

C2 Second oil storage space

sc1 first small oil containing space

sc2 second small oil containing space

sc3 third small oil containing space

hxb, hxd spiral channel

Detailed Description

An embodiment of the present invention will be described with reference to fig. 1 to 3. Fig. 1 is a perspective view of a composite bearing structure 10a according to an embodiment of the invention. Fig. 2 is an exploded view of the composite bearing structure 10a of fig. 1. Fig. 3 is a schematic cross-sectional view of the composite bearing structure 10a of fig. 1.

The composite bearing structure 10a of the present embodiment is applied to accommodate the shaft center (not shown) of mechanical rotating load parts such as a motor, a cooling fan, a general electric fan, and a pen armature rotating element. The composite bearing structure 10a includes a sleeve 100a, a bearing 200a and at least a first spoiler 300a. The sleeve 100a has a receiving space 101a. The bearing 200a is, for example, an oil-retaining bearing and is disposed in the accommodating space 101a of the shaft sleeve 100 a. The bearing 200a has a shaft hole 201a. The shaft hole 201a can be used to accommodate the aforementioned shaft. The bearing 200a and the sleeve 100a form a chamber C. The chamber C is used for containing lubricating oil (not shown) and communicates with the shaft hole 201a, so that the shaft center contained in the shaft hole 201a can be lubricated. The first spoiler 300a is disposed in the chamber C and sleeved on the bearing 200a. The first flow blocking element 300a can effectively increase the flow path length of the lubricating oil in the chamber C, and the lubricating oil is not easily leaked from a small gap (not shown) between the sleeve 100a and the bearing 200a due to the composite structure of the first flow blocking element 300a and the bearing 200a.

Specifically, in the present embodiment and some embodiments of the present invention, the sleeve 100a includes a sidewall 110a and a seat 120a. The sidewall 110a stands on the seat 120a and surrounds the accommodating space 101a. The bearing 200a includes a main body 210a and a side 220a. The side portion 220a is provided at one end of the body portion 210a. The body portion 210a is located between the seat portion 120a and the side portion 220a of the bushing 100 a. The side portion 220a is closely fitted to the sidewall 110a of the sleeve 100 a. The first choke 300a is fitted over the main body portion 210a of the bearing 200a. That is, the lubricating oil in the cavity C is not easy to leak out from the small gap between the shaft sleeve 100a and the bearing 200a due to the side wall 110a and the side portion 220a which are tightly fitted; in addition, the lubricant is not easy to escape from the small gap between the shaft sleeve 100a and the bearing 200a after being vaporized by heat. It should be noted that, in the embodiment and some embodiments of the present invention, the main body 210a and the side 220a of the bearing 200a are integrally formed, but the present invention is not limited thereto. In some embodiments, the main body and the side portion may also be of two-piece structure. In addition, in the present embodiment and some embodiments of the present invention, the first flow blocking element 300a is circular at the outer edge, but the present invention is not limited thereto. In some embodiments, the first spoiler may also have a cut-out at the outer edge, as will be described in detail below with reference to the embodiment of fig. 11 to 12.

In this embodiment and some embodiments of the present invention, at least one second flow blocking element 400a may be further included. The second choke 400a is disposed in the chamber C and sleeved on the main body portion 210a of the bearing 200a. Specifically, the number of the first spoilers 300a and the number of the second spoilers 400a are plural, and the first spoilers 300a and the second spoilers 400a are alternately arranged with each other. In this way, when the composite bearing structure 10a is installed on a shaft center operating at a high speed, the layered structure of the first spoiler 300a and the second spoiler 400a can disperse the vibration transmitted from the shaft center, thereby achieving the effect of shock absorption. In addition, the outer diameter of the second spoiler 400a is smaller than the outer diameter of the first spoiler 300a. That is, a first small oil-containing space sc1 is formed between the outer edge (not numbered) of the second spoiler 400a and the side wall 110a and between two adjacent first spoilers 300a, so that the lubricating oil is extended and stayed among the first spoiler 300a, the second spoiler 400a and the side wall 110a, thereby achieving the effect of reducing the flowing degree of the lubricating oil, and the lubricating oil is further prevented from leaking out from the small gap between the bushing 100a and the bearing 200a by the composite structure of the first spoiler 300a, the second spoiler 400a and the bearing 200a. It should be noted that, in the present embodiment and some embodiments of the present invention, one of the second spoilers 400a is preferably disposed adjacent to the side portion 220a. In this way, one of the first small oil accommodating spaces sc1 is also adjacent to the side portion 220a, so as to provide a good lubrication effect between the side portion 220a and the second spoiler 400a, but the invention is not limited thereto. In some embodiments, one of the first spoilers may also be arranged adjacent to the side of the bearing.

In this embodiment and some embodiments of the present invention, the first spoiler 300a has at least one first slot 301a, and the second spoiler 400a has at least one second slot 401a. Specifically, the first blocking element 300a has four square first slots 301a, for example, and the first slots 301a are located on an inner edge (not numbered) of the first blocking element 300a, and the second blocking element 400a has four square second slots 401a, for example, and the second slots 401a are located on an inner edge (not numbered) of the second blocking element 400a, but the invention is not limited to the number, positions or shapes of the first slots 301a and the second slots 401a. In some embodiments, the first spoiler may have more than two first notches, and the second spoiler may have more than two second notches. In some embodiments, the first slot may be located at an outer edge of the first spoiler, and the second slot may be located at an outer edge of the second spoiler. In some embodiments, the first notch and the second notch may be circular arcs. In this embodiment and some embodiments of the present invention, the first notch 301a and the second notch 401a are offset and communicate with each other. In this way, a second small oil containing space sc2 is formed between the inner wall surfaces of the first and

second grooves

301a and 401a and the main body 210a, so that the lubricating oil is extended and stayed among the first and

second chokes

300a and 400a and the main body 210a, thereby achieving the effect of reducing the flowing degree of the lubricating oil, and further preventing the lubricating oil from leaking out from the small gap between the shaft sleeve 100a and the bearing 200a. In addition, since the first slot 301a and the second slot 401a can provide a space for the first spoiler 300a and the second spoiler 400a to deform slightly, respectively, the first spoiler 300a and the second spoiler 400a are easily assembled and sleeved on the main body portion 210a.

In this embodiment and some embodiments of the present invention, a shock-proof structure 500a may be further included. The material of the anti-vibration structure 500a may be, for example, a metal material such as copper. The anti-vibration structure 500a is disposed between the seat portion 120a and the body portion 210a of the bushing 100 a. The shock absorbing structure 500a includes a central portion 510a and an outer peripheral portion 520a. The peripheral portion 520a surrounds the central portion 510a. The central portion 510a protrudes from the outer peripheral portion 520a, and the central portion 510a has a recess 511a at a side toward the seat portion 120a of the boss 100 a. After the vibration isolating structure 500a is assembled, the recess 511a is surrounded by the central portion 510a, the outer peripheral portion 520a and the seat portion 120a to form a third small oil-containing space sc3. The third small oil accommodating space sc3 can store lubricating oil, so that the effect of reducing the flowing degree of the lubricating oil is achieved, and the lubricating oil is further prevented from leaking out from a small gap between the shaft sleeve 100a and the bearing 200a due to the combined structure of the first flow blocking piece 300a, the second flow blocking piece 400a, the shockproof structure 500a and the bearing 200 a; in addition, the third small oil containing space sc3 prevents the vibration from the shaft center from being directly transmitted to other components in the bushing 100a through the central portion 510a of the vibration isolating structure 500a.

In this embodiment and some embodiments of the present invention, a gasket 600a may be further included. The pad 600a is, for example, a wear-resistant sheet and is disposed between the anti-vibration structure 500a and the main body portion 210a in close flat contact. The shim 600a has a first side 601a, for example a straight line, and a second side 602a, for example an arc. The first side 601a is connected to the second side 602a. The spacer 600a is spaced from the sidewall 110a at a first side 601a, and the spacer 600a is attached to the sidewall 110a at a second side 602a. In this way, the gasket 600a may divide the chamber C into a first oil storage space C1 and a second oil storage space C2 at the second side 602a, but the first oil storage space C1 and the second oil storage space C2 are still maintained to be communicated at the first side 601a, wherein the first choke 300a is located in the first oil storage space C1, and the anti-vibration structure 500a is located in the second oil storage space C2. By providing the gasket 600a, the lubricant in the second oil storage space C2 may be blocked by the gasket 600a and is not easy to flow into the first oil storage space C1, and the lubricant is not easy to leak out from the small gap between the shaft sleeve 100a and the bearing 200a through the first spoiler 300a, the second spoiler 400a, the anti-vibration structure 500a, the gasket 600a and the composite structure of the bearing 200a.

In the above embodiments, the main body portion 210a is sleeved by the first spoiler 300a and the second spoiler 400a, but the invention is not limited thereto. Please refer to fig. 4 to 5. Fig. 4 is an exploded view of a composite bearing structure 10b according to another embodiment of the invention. Fig. 5 is a cross-sectional view of the composite bearing structure 10b of fig. 4. The following description is only for differences between another embodiment of the present invention and some of the foregoing embodiments, and the rest of the same parts will be omitted. In this embodiment and some embodiments of the present invention, only the first spoiler 300b having a spiral structure is sleeved on the main body portion 210b. Specifically, the first choke 300b is, for example, a coil spring (coil spring) and is located between the side portion 220b and the seat portion 120 b. Since the first choke 300b has a coil (not numbered) with a circular cross section and spirally surrounds the coil, a plurality of spiral channels hxb are formed between the coil and the main body portion 210b and between the coil and the side wall 110b, thereby increasing the length of the flow path of the lubricating oil, and the lubricating oil is not easily leaked from the small gap between the bushing 100b and the bearing 200b through the composite structure of the first choke 300b and the bearing 200 b. It should be noted that, although the coil spring of the first choke 300b is fully compressed in this embodiment and some embodiments of the present invention, the present invention is not limited thereto. In some embodiments, the coil spring of the first choke element may not be fully compressed, and a larger helical channel may be formed to increase the flow passage space. Alternatively, in some embodiments, the first flow blocking element may be another helical structure without elasticity, such as a helical cylinder.

In the above embodiments, the chambers are closed by the

seat portions

120a, 120b and the

side portions

220a, 220b, but the invention is not limited thereto. Please refer to fig. 6 to 8. Fig. 6 is a perspective view of a composite bearing structure 10c according to still another embodiment of the invention. Fig. 7 is an exploded view of the composite bearing structure 10c of fig. 6. Fig. 8 is a cross-sectional view of the composite bearing structure 10c of fig. 6. The following description is only for the differences between the other embodiment of the present invention and some of the foregoing embodiments, and the rest of the same parts will be omitted. In this embodiment and some embodiments of the present invention, the sleeve 100c includes only one sidewall 110c. The sidewall 110c surrounds the accommodating space 101c. The number of the bearings 200c is two, and the shaft holes 201c of the bearings 200c communicate with each other. The bearings 200c each include a body portion 210c and a side portion 220c. The two main bodies 210c are disposed between the two side bodies 220c. The side portion 220c is closely fitted to the sidewall 110c of the sleeve 100 c. The lubricant in the chamber C is not easily leaked out from a small gap (not shown) between the shaft sleeve 100C and the bearing 200C by the side wall 110C and the side portion 220C which are tightly fitted; in addition, the lubricant is not easy to escape from the small gap between the shaft sleeve 100c and the bearing 200c after being vaporized by heat.

Similarly, in the above-mentioned embodiment, the main body portion 210c is sleeved with a plurality of first chokes 300c and second chokes 400c, but the invention is not limited thereto. Please refer to fig. 9 to 10. Fig. 9 is an exploded view of a composite bearing structure 10d according to another embodiment of the invention. Fig. 10 is a cross-sectional view of the composite bearing structure 10d of fig. 9. The following description will be made only for differences between the embodiment of the present invention and the embodiments of fig. 6 to 8, and the rest of the same parts will be omitted. In this embodiment and some embodiments of the present invention, only the first spoiler 300d having a spiral structure is sleeved on the main body portion 210d. Specifically, the first choke 300d is, for example, a coil spring and is located between the two sides 220 d. Since the first flow blocking element 300d has a coil (not labeled) with a circular cross section and spirally surrounds the coil, a plurality of spiral channels hxd are formed between the coil and the main body portion 210d and between the coil and the side wall 110d, thereby increasing the flow path of the lubricating oil, and the lubricating oil is not easy to leak out from a small gap between the bearing 100d and the bearing 200d through the composite structure of the first flow blocking element 300d and the bearing 200 d. It should be noted that, although the coil spring of the first choke 300d is fully compressed in this embodiment and some embodiments of the present invention, the present invention is not limited thereto. In some embodiments, the coil spring of the first choke element may not be fully compressed, and a larger helical channel may be formed to increase the flow passage space. Alternatively, in some embodiments, the first flow resisting element may also be another helical structure without elasticity, such as a helical cylinder.

In the above-mentioned embodiment of fig. 1 to 3, the first spoiler 300a is circular at the outer edge and has four square first notches 301a at the inner edge, and the second spoiler flow 400a has four square second notches 401a at the inner edge, but the present invention is not limited thereto. Please refer to fig. 11 and 12. Fig. 11 is an exploded view of a composite bearing structure 10e according to yet another embodiment of the invention. Fig. 12 is a cross-sectional view of the composite bearing structure 10e of fig. 11. The following description is only for differences between the embodiment of the present invention and the embodiments of fig. 6 to 8, and the same parts will be omitted. In this embodiment and some embodiments of the present invention, the first spoiler 300e has, for example, three first notches 301e in the shape of circular arcs, and the second spoiler 400e has, for example, three second notches 401e in the shape of circular arcs. Furthermore, the first spoiler 300e has a first edge 310e, which is, for example, a straight line, and a second edge 320e, which is, for example, an arc, at the outer edge. The first edge 310e connects to the second edge 320e. The first edge 310e and the first notch 301e are offset in the radial direction of the first spoiler 300 e; that is, the first slot 301e faces away from the second edge 320e. The shortest distance from the first side 310e to a center point (not otherwise labeled) of the first spoiler 300e is smaller than the shortest distance from the second side 320e to the center point of the first spoiler 300 e. The first spoiler 300e is spaced apart from the side wall 110e at the first side 310e, and the first spoiler 300e is attached to the side wall 110e at the second side 320e. In this way, the first small oil containing spaces sc1 can still have a certain connectivity at the first side 310 e. Similarly, the first spoiler 300c may be configured as the first spoiler 300e of the embodiment of fig. 11 to 12 instead of the embodiment of fig. 6 to 8, and thus, the embodiment of fig. 6 to 8 is still another embodiment, and will not be described herein again.

According to the composite bearing structure disclosed in the above embodiments, the first flow blocking element is disposed in the cavity and sleeved on the bearing. Therefore, the first flow blocking piece can effectively increase the length of the flow path of the lubricating oil in the cavity, and the lubricating oil is not easy to leak out from a tiny gap between the shaft sleeve and the bearing through the composite structure of the first flow blocking piece and the bearing.

In some embodiments, the side portion is closely fitted to the side wall of the sleeve. Lubricating oil in the cavity can not easily leak out from a tiny gap between the shaft sleeve and the bearing through the side wall and the side part which are arranged in a close fit manner; in addition, when the lubricating oil is vaporized by heat, the lubricating oil is not easy to escape from the tiny gap between the shaft sleeve and the bearing.

In some embodiments, the first spoiler and the second spoiler are arranged alternately with respect to each other. Therefore, when the composite bearing structure is installed on the axle center running at high speed, the vibration transmitted from the axle center can be dispersed by the layered structure of the first flow resisting part and the second flow resisting part, and the effect of absorbing the vibration is further achieved.

In some embodiments, the outer diameter of the second choke element is smaller than the outer diameter of the first choke element to form a first small oil containing space, so that the lubricating oil is prolonged to stay among the first choke element, the second choke element and the side wall, and the effect of reducing the flowing degree of the lubricating oil is achieved.

In some embodiments, the first notch is offset from the second notch. Therefore, a second small oil containing space can be formed between the inner wall surfaces of each first notch and each second notch and the main body part, so that the lubricating oil is prolonged to stay among the first flow resisting piece, the second flow resisting piece and the main body part, the effect of reducing the flowing degree of the lubricating oil is achieved, and the lubricating oil is further prevented from leaking from a small gap between the shaft sleeve and the bearing.

In some embodiments, a shock-proof structure may be further included. After the shockproof structure is assembled, the recess is surrounded by the central portion, the outer peripheral portion and the seat portion to form a third small oil containing space. The third small oil containing space can store lubricating oil, so that the effect of reducing the flowing degree of the lubricating oil is achieved, and the lubricating oil is further prevented from leaking out from a small gap between the shaft sleeve and the bearing easily through the first flow blocking part, the second flow blocking part, the shockproof structure and the combined structure of the bearing; in addition, the third small oil containing space can prevent the vibration from the axle center from being directly transmitted to other parts in the shaft sleeve through the central part of the shockproof structure.

In some embodiments, a gasket may be further included. By arranging the gasket, the lubricating oil in the second oil storage space can be blocked by the gasket and is not easy to flow to the first oil storage space, and the lubricating oil is further not easy to leak out from a small gap between the shaft sleeve and the bearing through the first flow blocking piece, the second flow blocking piece, the shockproof structure and the combined structure of the gasket and the bearing.

In some embodiments, the first flow blocking element is a coil with a circular cross section and spirally wound, and a plurality of spiral channels are formed between the coil and the main body part and between the coil and the side wall, so that the length of the flow path of the lubricating oil is increased, and the lubricating oil is not easy to leak out from a small gap between the shaft sleeve and the bearing through a composite structure of the first flow blocking element and the bearing.

In some embodiments, the first flow blocker has a first edge and a second edge at the outer edge. The first edge is connected to the second edge. The first edge is offset from the first notch in the radial direction of the first spoiler. The shortest distance from the first edge to the center point of the first spoiler is smaller than the shortest distance from the second edge to the center point of the first spoiler. The first spoiler keeps a certain distance from the side wall at the first edge, and the first spoiler is attached to the side wall at the second edge. In this way, the first small oil containing spaces can still have certain connectivity at the first edge.

Claims

1. A composite bearing structure for accommodating an axle, the composite bearing structure comprising:

a shaft sleeve with a containing space;

the bearing is arranged in the accommodating space of the shaft sleeve and provided with a shaft hole for accommodating the shaft center, the bearing and the shaft sleeve form a cavity, and the cavity is communicated with the shaft hole;

the first flow choking piece is arranged in the cavity and sleeved with the bearing; and

and the second flow blocking part is arranged in the cavity and sleeved with a main body part of the bearing, and the outer diameter of the second flow blocking part is smaller than that of the first flow blocking part.

2. The composite bearing structure of claim 1, wherein the number of the bearings is two, the two shaft holes of the two bearings are communicated with each other, the two bearings each include a main body portion and a side portion, the two main body portions are disposed between the two side portions, the two side portions are tightly fitted to the shaft sleeve, and the main body portions of the bearings are sleeved with the first flow blocking member and the second flow blocking member.

3. The composite bearing structure of claim 1, wherein the bearing comprises a main body and a side portion, the side portion is disposed at one end of the main body, the main body is disposed between the sleeve and the side portion, the side portion is disposed on the sleeve in a close-fitting manner, and the first spoiler and the second spoiler are disposed on the main body of the bearing.

4. The composite bearing structure of claim 1, wherein the first spoiler has at least one first slot, the second spoiler has at least one second slot, and the at least one first slot is offset from the at least one second slot.

5. The composite bearing structure of claim 4, wherein the at least one first slot is located on an inner edge of the first spoiler and the at least one second slot is located on an inner edge of the second spoiler.

6. The composite bearing structure of claim 3, further comprising a vibration-proof structure disposed between the sleeve and the main body, the vibration-proof structure comprising a central portion and an outer peripheral portion, the outer peripheral portion surrounding the central portion, the central portion protruding from the outer peripheral portion, and a side of the central portion facing the sleeve having a recess.

7. The composite bearing structure of claim 1, wherein the first spoiler has a first edge and a second edge at an outer edge thereof, the first edge connecting the second edge, a shortest distance from the first edge to a center point of the first spoiler being smaller than a shortest distance from the second edge to the center point of the first spoiler.

8. The composite bearing structure of claim 1, wherein the sleeve includes a sidewall and a seat, the sidewall standing on the seat and surrounding the receiving space.