Assembled bearing retainer

Abstract

The utility model discloses a split mounting type bearing retainer which is mounted between an inner ring and an outer ring of a bearing and is characterized by comprising a first anti-abrasion part close to the outer ring of the bearing, a second anti-abrasion part close to the inner ring of the bearing and a damping part located between the first anti-abrasion part and the second anti-abrasion part, a plurality of first loading cavities are formed in the first anti-abrasion part, and a plurality of second loading cavities are formed in the second anti-abrasion part; a plurality of second loading cavities are formed in the damping part, and a plurality of third loading cavities are formed in the second anti-abrasion part; the first anti-abrasion part is provided with a first abutting face facing the first loading cavity, the second anti-abrasion part is provided with a second abutting face facing the second loading cavity, the damping part is provided with a separation face facing the third loading cavity, and an anti-abrasion gap is formed between the separation face and the ball bearing cavity. According to the bearing retainer, the first anti-abrasion part, the damping part and the second anti-abrasion part are arranged from inside to outside, so that vibration impact borne by the bearing retainer is greatly reduced, the structural strength of the bearing retainer is greatly improved, and the service life of the bearing retainer is greatly prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bearing retainer, and particularly relates to a spliced bearing retainer. BACKGROUND

[0002] As an important transmission component, bearings are widely used in the fields of aerospace, engineering machinery, textile, vehicles and other mechanical fields. Bearings are mainly composed of an inner ring, an outer ring, rolling elements, a bearing retainer and a lubricant. The bearing retainer, as an important part of the bearing, plays a key role in isolating the rolling elements, guiding and driving the rolling elements to roll correctly, and preventing the rolling elements from falling off.

[0003] According to different application scenarios, different types of bearing retainers need to be selected. For example, for some bearings that need to face heavy load and high speed conditions, high-strength and wear-resistant bearing retainers are usually used. For some bearings that need to face large vibration conditions, bearing retainers with good toughness and strong impact resistance are usually used. However, if the bearing faces conditions that simultaneously consider heavy load, high speed and strong impact, there is no particularly suitable bearing retainer. CONTENT OF THE INVENTION

[0004] The application provides a spliced bearing retainer to solve the technical problem that the conventional bearing retainer cannot simultaneously consider high strength, strong wear resistance and strong impact resistance.

[0005] The technical scheme adopted by the application is as follows:

[0006] A spliced bearing retainer is installed between the inner ring and the outer ring of a bearing, comprising a first wear-resistant part close to the outer ring of the bearing, a second wear-resistant part close to the inner ring of the bearing, and a shock-absorbing part between the first wear-resistant part and the second wear-resistant part. The first wear-resistant part is provided with a plurality of first loading cavities, the shock-absorbing part is provided with a plurality of second loading cavities, and the second wear-resistant part is provided with a plurality of third loading cavities. The first loading cavities, the second loading cavities and the third loading cavities are sequentially and continuously arranged to form a plurality of ball bearing cavities. The first wear-resistant part has a first abutting surface facing the first loading cavities, the second wear-resistant part has a second abutting surface facing the second loading cavities, and the shock-absorbing part has a separation surface facing the third loading cavities. The separation surface is arranged in a staggered manner with the first abutting surface and the second abutting surface and forms a wear-resistant gap with the ball bearing cavities.

[0007] The spliced bearing retainer described in the application further comprises the following additional technical features:

[0008] The first abutting surface and the second abutting surface are arranged in an arc shape, and the centers of curvature of the first abutting surface and the second abutting surface coincide.

[0009] The first anti-wear portion and the second anti-wear portion have the same thickness, and both thicknesses are D1. The shock-absorbing portion has a thickness of D2, where D2 is less than or equal to 0.3D1.

[0010] The length of the anti-wear gap is L, and L≤1mm.

[0011] The first anti-wear portion and the second anti-wear portion are both annular structures made of steel, and / or the shock-absorbing portion is an annular structure made of copper alloy.

[0012] The first anti-wear portion is provided with a plurality of first pouring grooves along its circumferential direction, the shock-absorbing portion is provided with a plurality of second pouring grooves along its circumferential direction, and the second anti-wear portion is provided with a plurality of third pouring grooves along its circumferential direction. The first pouring grooves, the second pouring grooves, and the third pouring grooves are sequentially aligned and connected to form a pouring connection groove.

[0013] The first anti-wear portion is composed of a plurality of first anti-wear layers, and the first anti-wear portion includes a plurality of first loading cavities. Each of the first anti-wear layers is provided with a first loading hole, and the plurality of first loading holes together constitute the first loading cavity.

[0014] The shock absorbing part is composed of a plurality of shock absorbing layers, and the shock absorbing part includes a plurality of second loading cavities. Each of the shock absorbing layers is respectively provided with a second loading hole, and the plurality of second loading holes together constitute the second loading cavity.

[0015] The second anti-wear portion is composed of a plurality of second anti-wear layers, and the second anti-wear portion includes a plurality of third loading cavities. Each of the second anti-wear layers is provided with a third loading hole, and the plurality of third loading holes together constitute the third loading cavity.

[0016] The first anti-wear part is provided with a first oil inlet and a first oil outlet, the first oil inlet is connected with the first oil outlet to form a first oil inlet pipeline, and the first oil outlet is located on the side of the first anti-wear part facing the anti-wear gap, and / or the second anti-wear part is provided with a second oil inlet and a second oil outlet, the second oil inlet is connected with the second oil outlet to form a second oil inlet pipeline, and the second oil outlet is located on the side of the second anti-wear part facing the anti-wear gap.

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0018] 1. The bearing retainer of the present application includes a first anti-wear portion, a second anti-wear portion and a shock-absorbing portion located between the first anti-wear portion and the second anti-wear portion, wherein the first anti-wear portion and the second anti-wear portion mainly play the role of reinforcing the structure of the bearing retainer and improving the wear resistance of the bearing retainer, ensuring that the bearing retainer has sufficient structural strength and strong wear resistance to cope with high-load and high-speed working conditions; and the provision of the shock-absorbing portion enables the first anti-wear portion and the second anti-wear portion to be effectively absorbed and reduced in vibration when the first anti-wear portion and the second anti-wear portion are brought close to each other due to external force during operation, thereby reducing the relative impact between the first anti-wear portion and the second anti-wear portion, thereby greatly improving Anti-vibration performance of the bearing retainer; In summary, the arrangement of the first anti-wear part, the shock-absorbing part and the second anti-wear part from the inside to the outside enables the bearing retainer of the present application to greatly reduce the vibration impact it suffers when used in high-load and high-speed bearings while having a higher structural strength, thereby greatly improving the structural strength and service life of the bearing retainer; in addition, the separation surface of the shock-absorbing part is staggered with the first abutting surface and the second abutting surface, so that an anti-friction gap is formed between the separation surface and the ball-bearing cavity. In this way, when the ball rotates in the ball-bearing cavity, it will not rub against the separation surface, thereby avoiding the friction of the ball on the shock-absorbing part, which helps to improve the durability of the shock-absorbing part.

[0019] 2. As a preferred embodiment of the present application, the first and second abutting surfaces are arcuate, with their centers of curvature coinciding. This configuration helps improve the smooth rotation of the balls within the ball-bearing cavity, reduces wear between the balls and the first or second abutting surfaces, and increases the service life of the bearing retainer.

[0020] 3. As a preferred embodiment of the present application, the relationship between the thickness D2 of the shock-absorbing part and the thickness D1 of the first anti-wear part and the second anti-wear part is set to D2≤0.3D1, so that the shock-absorbing part will not cause excessive reduction in the structural strength of the bearing retainer while playing a sufficient vibration absorption function for the first anti-wear part and the second anti-wear part, which helps to maintain the durability of the bearing retainer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 This is a structural diagram of an assembled bearing cage according to one embodiment of the present application;

[0023] Figure 2A sectional view of a partial structure of the assembled bearing retainer according to an embodiment of the present application Figure 1

[0024] Figure 3 A structure diagram of the first wear-preventing part according to an embodiment of the present application

[0025] Figure 4 A structure diagram of the shock-absorbing part according to an embodiment of the present application

[0026] Figure 5 A structure diagram of the second wear-preventing part according to an embodiment of the present application

[0027] Figure 6 A structure diagram of the assembled bearing retainer according to another embodiment of the present application

[0028] Figure 7 A structure diagram of the assembled bearing retainer according to still another embodiment of the present application

[0029] Figure 8 A sectional view of a partial structure of the assembled bearing retainer according to an embodiment of the present application Figure 2

[0030] Wherein:

[0031] 1. The first wear-preventing part, 11. The first loading cavity, 12. The first abutting surface, 13. The first pouring groove, 14. The first oil inlet, 15. The first oil outlet, 16. The first wear-preventing layer;

[0032] 2. The shock-absorbing part, 21. The second loading cavity, 22. The separating surface, 23. The second pouring groove, 24. The shock-absorbing layer;

[0033] 3. The second wear-preventing part, 31. The third loading cavity, 32. The second abutting surface, 33. The third pouring groove, 34. The second oil inlet, 35. The second oil outlet, 36. The second wear-preventing layer;

[0034] 4. The ball bearing cavity;

[0035] 5. The wear-preventing gap;

[0036] 6. The first oil inlet pipeline;

[0037] 7. The second oil inlet pipeline. DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0039] ​​In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced without the specific details. In other instances, well-known methods, procedures, components, and circuits have not been described in detail so as not to unnecessarily obscure aspects of the present application. It can be understood that the embodiments of the present application and the characteristics of the embodiments can be combined with each other under the condition of no conflict.

[0040] In addition, in the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0041] In the present application, unless specifically defined and limited otherwise, the terms "mount", "connect", "connection", "fixed", and the like are to be construed broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection, or communication; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the specification, the description referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0043] As Figures 1 to 8As shown, an assembled bearing retainer is installed between the inner ring and the outer ring of the bearing, including a first anti-wear portion 1 close to the outer ring of the bearing, a second anti-wear portion 3 close to the inner ring of the bearing, and a shock-absorbing portion 2 located between the first anti-wear portion 1 and the second anti-wear portion 3, the first anti-wear portion 1 is provided with a plurality of first loading cavities 11, the shock-absorbing portion 2 is provided with a plurality of second loading cavities 21, and the second anti-wear portion 3 is provided with a plurality of third loading cavities 31. The plurality of first loading cavities 11, the second loading cavities 21, and the third loading cavities 31 are sequentially aligned and connected to form a plurality of ball-bearing cavities 4; the first anti-wear portion 1 has a first abutting surface 12 facing the first loading cavity 11, the second anti-wear portion 3 has a second abutting surface 32 facing the second loading cavity 21, and the shock-absorbing portion 2 has a separation surface 22 facing the third loading cavity 31. The separation surface 22 is staggered with the first abutting surface 12 and the second abutting surface 32 and forms an anti-wear gap 5 with the ball-bearing cavity 4.

[0044] The bearing retainer of the present application includes a first anti-wear portion 1, a second anti-wear portion 3 and a shock-absorbing portion 2 located between the first anti-wear portion 1 and the second anti-wear portion 3, wherein the first anti-wear portion 1 and the second anti-wear portion 3 mainly play the role of strengthening the structure of the bearing retainer and improving the wear resistance of the bearing retainer, ensuring that the bearing retainer has sufficient structural strength and strong wear resistance to cope with high-load and high-speed working conditions; and the setting of the shock-absorbing portion 2 makes it possible for the first anti-wear portion 1 and the second anti-wear portion 3 to vibrate close to each other due to external force during operation, and the shock-absorbing portion 2 can effectively absorb and reduce the vibration of the first anti-wear portion 1 and the second anti-wear portion 3, thereby reducing the relative impact of the first anti-wear portion 1 and the second anti-wear portion 3, thereby greatly improving the bearing retainer. Anti-vibration performance of the holder; In summary, the arrangement of the first anti-wear part 1, the shock-absorbing part 2 and the second anti-wear part 3 from the inside to the outside enables the bearing retainer of the present application to greatly reduce the vibration impact it suffers when used in high-load and high-speed bearings while having a higher structural strength, thereby greatly improving the structural strength and service life of the bearing retainer; In addition, the separation surface 22 of the shock-absorbing part 2 is staggered with the first abutting surface 12 and the second abutting surface 32, so that an anti-friction gap is formed between the separation surface 22 and the ball-bearing cavity 4. In this way, when the ball rotates in the ball-bearing cavity 4, no relative friction occurs with the separation surface 22, thereby avoiding the friction of the ball on the shock-absorbing part 2, which helps to improve the durability of the shock-absorbing part 2.

[0045] As a preferred embodiment of the present application, Figure 2 As shown, the first abutting surface 12 and the second abutting surface 32 are arranged in an arc shape, and the curvature centers of the first abutting surface 12 and the second abutting surface 32 coincide with each other.

[0046] The first abutting surface 12 and the second abutting surface 32 are arranged in an arc shape, and the centers of curvature of the first abutting surface 12 and the second abutting surface 32 coincide with each other. This arrangement helps to improve the smoothness of the ball's rotation within the ball-bearing cavity 4, reduces wear between the ball and the first abutting surface 12 or the second abutting surface 32, and increases the service life of the bearing retainer.

[0047] Specifically, the curvature of the first abutting surface 12 and the second abutting surface 32 is determined according to the curvature of the ball. Taking the ball as an example, the curvature of the first abutting surface 12 and the second abutting surface 32 is the same as the curvature of the outer surface of the spherical ball.

[0048] As a preferred embodiment of the present application, Figure 2 As shown, the first anti-wear portion 1 and the second anti-wear portion 3 have the same thickness and both have a thickness of D1, and the thickness of the shock-absorbing portion 2 is D2, D2≤0.3D1. The relationship between the thickness D2 of the shock-absorbing portion 2 and the thickness D1 of the first anti-wear portion 1 and the second anti-wear portion 3 is set to D2≤0.3D1, so that the shock-absorbing portion 2 can fully absorb the vibrations of the first anti-wear portion 1 and the second anti-wear portion 3 without excessively reducing the structural strength of the bearing retainer, which helps to maintain the durability of the bearing retainer. Figure 2 In the figure, the arrow X indicates the thickness direction of the first anti-wear portion 1 , the shock-absorbing portion 2 and the second anti-wear portion 3 .

[0049] As a preferred embodiment of the present application, Figure 2 As shown, the length of the anti-wear gap 5 is L, L≤1mm. Setting the length L of the anti-wear gap 5 to L≤1mm allows the shock-absorbing portion 2 to adequately absorb vibrations from the first anti-wear portion 1 and the second anti-wear portion 3 without significantly reducing the structural strength of the bearing cage, thereby helping to maintain the durability of the bearing cage.

[0050] As a preferred embodiment of the present application, Figure 1 As shown, the first anti-wear part 1 and the second anti-wear part 3 are both annular structures made of steel, or the shock-absorbing part 2 is an annular structure made of copper alloy, or the first anti-wear part 1, the second anti-wear part 3, and the shock-absorbing part 2 are all annular structures made of steel.

[0051] The first anti-wear part 1 and the second anti-wear part 3 are set to be an annular structure made of steel, so that the first anti-wear part 1 and the second anti-wear part 3 have high strength and toughness, effectively improving the structural strength of the bearing retainer, so that the bearing retainer can withstand large loads and impacts; in addition, the first anti-wear part 1 and the second anti-wear part 3 made of steel have strong wear resistance. For high-load bearings, good wear resistance can increase the service life of the bearing retainer; the shock-absorbing part 2 adopts an annular structure made of copper alloy, so that the shock-absorbing part 2 has high tensile strength and mechanical strength, and has a strong kinetic energy absorption effect in the face of vibration impact of the first anti-wear part 1 and the second anti-wear part 3, thereby improving the durability of the bearing retainer.

[0052] Preferably, if Figure 6 As shown, the first anti-wear portion 1 is provided with a plurality of first pouring grooves 13 along its circumferential direction, the shock-absorbing portion 2 is provided with a plurality of second pouring grooves 23 along its circumferential direction, and the second anti-wear portion 3 is provided with a plurality of third pouring grooves 33 along its circumferential direction. The first pouring grooves 13, the second pouring grooves 23, and the third pouring grooves 33 are sequentially aligned and connected to form a pouring connection groove. Each first pouring groove, the second pouring groove, and the third pouring groove are also sequentially aligned and connected. Aluminum liquid is poured into the first pouring groove, the second pouring groove, and the third pouring groove. After the aluminum liquid condenses, the first anti-wear portion 1, the shock-absorbing portion 2, and the second anti-wear portion 3 are connected.

[0053] As a preferred embodiment of the present application, Figure 7 As shown, the first anti-wear portion 1 is composed of multiple first anti-wear layers 16, and the first anti-wear portion 1 includes multiple first loading cavities 11. Each first anti-wear layer 16 is respectively provided with a first loading hole, and the multiple first loading holes together constitute the first loading cavity 11.

[0054] Since the first anti-wear part 1 is composed of multiple first anti-wear layers 16, the first anti-wear part 1 is obtained by opening first loading holes on multiple first anti-wear layers 16 and then assembling them. Compared with the method of directly processing the entire blank, the method of opening first loading holes on each first anti-wear layer 16 in this embodiment reduces the requirements on the cutting accuracy of the processing equipment. It is only necessary to calibrate the size of the first loading holes on each first anti-wear layer 16, and first loading cavities 11 of different shapes and types can be assembled according to design requirements.

[0055] As a preferred embodiment of the present application, Figure 7 As shown, the shock absorbing part 2 is composed of multiple shock absorbing layers 24 , and the shock absorbing part 2 includes multiple second loading cavities 21 . Each shock absorbing layer 24 is respectively provided with a second loading hole, and the multiple second loading holes together constitute the second loading cavity 21 .

[0056] Since the damping part 2 is composed of multiple damping layers 24, the second loading holes are opened on the multiple damping layers 24, and then the damping part 2 is obtained by assembling, compared with the way of processing on the whole blank, the way of opening the second loading holes on each damping layer 24 in the embodiment reduces the requirement for cutting precision of the processing equipment, only the size of the second loading hole on each damping layer 24 needs to be calibrated, and different shape types of the second loading cavity 21 can be obtained by assembling according to the design needs.

[0057] As a preferred embodiment of the present application, as shown in Figure 7 The second wear-resistant part 3 is composed of multiple second wear-resistant layers 36, the second wear-resistant part 3 includes multiple third loading cavities 31, each second wear-resistant layer 36 is provided with a third loading hole, and multiple third loading holes jointly constitute the third loading cavity 31.

[0058] Since the second wear-resistant part 3 is composed of multiple second wear-resistant layers 36, the first loading holes are opened on the multiple second wear-resistant layers 36, and then the second wear-resistant part 3 is obtained by assembling, compared with the way of processing on the whole blank, the way of opening the third loading hole on each second wear-resistant layer 36 in the embodiment reduces the requirement for cutting precision of the processing equipment, only the size of the third loading hole on each second wear-resistant layer 36 needs to be calibrated, and different shape types of the third loading cavity 31 can be obtained by assembling according to the design needs. On this basis, since the damping part 2 is composed of multiple damping layers 24, the damping layers 24 in contact with the first wear-resistant part 1 and the second wear-resistant part 3 will sequentially transmit the vibration acting force from the first wear-resistant part 1 and the second wear-resistant part 3 and make the vibration sequentially weaken among the multiple damping layers 24 after receiving the vibration acting force from the first wear-resistant part 1 and the second wear-resistant part 3, which further improves the damping capacity of the damping part 2, thereby improving the anti-vibration performance of the bearing retainer.

[0059] As a preferred embodiment of the present application, as shown in Figure 8As shown, the first anti-wear part 1 is provided with a first oil filling port 14 and a first oil outlet 15, the first oil filling port 14 is connected with the first oil outlet 15 to form a first oil filling pipeline 6, and the first oil outlet 15 is located on the side of the first anti-wear part 1 facing the anti-wear gap 5; or the second anti-wear part 3 is provided with a second oil filling port 34 and a second oil outlet 35, the second oil filling port 34 is connected with the second oil outlet 35 to form a second oil filling pipeline 7, and the second oil outlet 35 is located on the side of the second anti-wear part 3 facing the anti-wear gap 5 side; or, the first anti-wear part 1 is provided with a first oil filling port 14 and a first oil outlet 15, the first oil filling port 14 is connected with the first oil outlet 15 to form a first oil filling pipeline 6, the first oil outlet 15 is located on the side of the first anti-wear part 1 facing the anti-wear gap 5, the second anti-wear part 3 is provided with a second oil filling port 34 and a second oil outlet 35, the second oil filling port 34 is connected with the second oil outlet 35 to form a second oil filling pipeline 7, the second oil outlet 35 is located on the side of the second anti-wear part 3 facing the anti-wear gap 5.

[0060] By setting up the first oil filling pipeline 6 and the second oil filling pipeline 7, it is convenient to inject lubricating oil into the anti-wear gap 5. Under the action of gravity, centrifugal force, etc., the lubricating oil contacts the ball and enters the gap between the ball and the first abutting surface 12 and the second abutting surface 32, thereby lubricating the rotation of the ball and reducing the friction between the ball and the first abutting surface 12 and the second abutting surface 32.

[0061] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0062] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0063] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. An assembled bearing retainer, installed between the inner ring and outer ring of a bearing, characterized in that: The bearing comprises a first anti-wear portion close to the outer ring of the bearing, a second anti-wear portion close to the inner ring of the bearing, and a shock-absorbing portion located between the first anti-wear portion and the second anti-wear portion, wherein the first anti-wear portion defines a plurality of first loading cavities, the shock-absorbing portion defines a plurality of second loading cavities, and the second anti-wear portion defines a plurality of third loading cavities, wherein the plurality of first loading cavities, the second loading cavities, and the third loading cavities are sequentially aligned and connected to form a plurality of ball-bearing cavities; The first anti-wear portion has a first abutment surface facing the first loading cavity, the second anti-wear portion has a second abutment surface facing the second loading cavity, and the shock-absorbing portion has a separation surface facing the third loading cavity. The separation surface is staggered with the first abutment surface and the second abutment surface and forms an anti-wear gap between the ball bearing cavity.

2. The assembled bearing retainer according to claim 1, characterized in that: The first abutting surface and the second abutting surface are arranged in an arc shape, and the curvature centers of the first abutting surface and the second abutting surface coincide with each other.

3. The assembled bearing retainer according to claim 1, characterized in that: The first anti-wear portion and the second anti-wear portion have the same thickness, and both thicknesses are D1. The shock-absorbing portion has a thickness of D2, where D2 is less than or equal to 0.3D1.

4. The assembled bearing retainer according to claim 1, characterized in that: The length of the anti-wear gap is L, and L is less than or equal to 1 mm.

5. The assembled bearing retainer according to claim 1, characterized in that: The first anti-wear portion and the second anti-wear portion are both annular structures made of steel, and / or the shock-absorbing portion is an annular structure made of copper alloy.

6. The assembled bearing retainer according to claim 5, characterized in that: The first anti-wear portion is provided with a plurality of first pouring grooves along its circumferential direction, the shock-absorbing portion is provided with a plurality of second pouring grooves along its circumferential direction, and the second anti-wear portion is provided with a plurality of third pouring grooves along its circumferential direction. The first pouring grooves, the second pouring grooves, and the third pouring grooves are sequentially aligned and connected to form a pouring connection groove.

7. The assembled bearing retainer according to claim 1, characterized in that: The first anti-wear portion is composed of a plurality of first anti-wear layers, and the first anti-wear portion includes a plurality of first loading cavities. Each of the first anti-wear layers is provided with a first loading hole, and the plurality of first loading holes together constitute the first loading cavity.

8. The assembled bearing retainer according to claim 1, characterized in that: The shock absorbing part is composed of a plurality of shock absorbing layers, and the shock absorbing part includes a plurality of second loading cavities. Each of the shock absorbing layers is respectively provided with a second loading hole, and the plurality of second loading holes together constitute the second loading cavity.

9. The assembled bearing retainer according to claim 1, characterized in that: The second anti-wear portion is composed of a plurality of second anti-wear layers, and the second anti-wear portion includes a plurality of third loading cavities. Each of the second anti-wear layers is provided with a third loading hole, and the plurality of third loading holes together constitute the third loading cavity.

10. The assembled bearing retainer according to claim 1, characterized in that: The first anti-wear part is provided with a first oil inlet and a first oil outlet, the first oil inlet is connected with the first oil outlet to form a first oil inlet pipeline, and the first oil outlet is located on the side of the first anti-wear part facing the anti-wear gap, and / or the second anti-wear part is provided with a second oil inlet and a second oil outlet, the second oil inlet is connected with the second oil outlet to form a second oil inlet pipeline, and the second oil outlet is located on the side of the second anti-wear part facing the anti-wear gap.

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