Double-row ball bearing retainer

Abstract

The double-row ball bearing retainer is installed between an inner ring and an outer ring of a bearing and is characterized by comprising two frame bodies arranged side by side, the frame bodies are annular and are divided into a plurality of ball containing grooves through separation frames in the surrounding direction of the frame bodies, the separation frames are provided with clamping parts protruding outwards in the direction of the ball containing grooves, and the clamping parts are provided with clamping grooves. The two clamping parts are arranged on the two sides of the partition frame at intervals, and a first oil inlet channel is formed between every two adjacent clamping parts. In the working process of the bearing, lubricating oil between the bearing inner ring and the bearing retainer can enter the first oil inlet channel under the action of gravity, centrifugal force and rotating force of the balls and gradually permeates between the balls and the clamping part along with movement of the balls, so that the filling amount of the lubricating oil between the balls and the bearing retainer is increased, and the service life of the bearing is prolonged. The lubricating effect between the balls and the bearing retainer is improved, sliding friction between the balls and the bearing retainer is reduced, and the service life of the balls and the bearing retainer is prolonged.

Description

Technical Field

[0001] The present application belongs to the technical field of bearing retainers, and specifically relates to a double-row ball bearing retainer. Background Art

[0002] Bearings, as crucial transmission components, are known as the "joints" of industry and are widely used in aerospace, engineering machinery, textiles, vehicles, and other mechanical fields. Bearings primarily consist of an inner ring, outer ring, rolling elements, a bearing cage, and lubricant. The bearing cage, a crucial component, plays a crucial role, isolating the rolling elements, guiding them in their proper rolling motion, and preventing them from falling out.

[0003] Double-row ball bearing cages, a type of bearing cage, are primarily used in engineering machinery, metallurgical equipment, and heavy-duty vehicles. These applications place high demands on the bearing cage's load-bearing capacity, service life, and stability. Double-row ball bearing cages are widely used due to their high load-bearing capacity, long service life, and excellent stability. During operation, a significant amount of sliding friction occurs between the balls and the bearing cage. This friction causes energy loss, affecting the bearing's operating efficiency and service life. Therefore, lubricating oil must be injected between the balls and the bearing cage to reduce friction between them. Existing bearing cages often suffer from insufficient lubricating oil filling between the balls, leading to increased friction and shortening the bearing cage's service life. Utility Model Content

[0004] The present application provides a double-row ball bearing cage to solve the technical problems of high wear and short service life of traditional double-row ball bearing cages caused by insufficient lubrication between the cage and the balls.

[0005] The technical solutions adopted in this application are:

[0006] A double-row ball bearing retainer is installed between the inner ring and the outer ring of the bearing, and includes two frame bodies arranged side by side. The frame body is annular and has multiple ball-receiving grooves along its circumferential direction. A separator is provided between two adjacent ball-receiving grooves. The separator has a clamping portion protruding outward toward the ball-receiving groove. There are two clamping portions and they are spaced apart on both sides of the separator. A first oil inlet channel is formed between the two adjacent clamping portions.

[0007] The double-row ball bearing cage described in this application also includes the following additional technical features:

[0008] The clamping portion extends from one end to the other end along the thickness direction of the frame body, and a second oil inlet channel communicating with the first oil inlet channel is opened on one side of the clamping portion facing the ball receiving groove.

[0009] The cross-sectional area of the second oil inlet channel gradually decreases from one end communicating with the first oil inlet channel to the other end away from the first oil inlet channel.

[0010] The second oil inlet channel is in plurality.

[0011] The second oil inlet channels on the two clamping portions on opposite sides are symmetrically arranged.

[0012] The top surface of the partition frame is provided with a weight-reducing groove extending along the thickness direction of the frame body.

[0013] The top surface of the partition frame is further provided with a transmission channel communicating the weight-reducing groove with the first oil inlet channel.

[0014] The clamping portion has an abutting surface facing the direction of the ball accommodating groove, and the abutting surface is arc-shaped.

[0015] Thanks to the above technical solutions, the application has the following beneficial effects:

[0016] 1. The double-row ball bearing retainer of the application comprises two rows of frame bodies arranged side by side, each frame body is provided with a plurality of ball accommodating grooves at intervals for accommodating balls, and adjacent two ball accommodating grooves are separated by a partition frame, the partition frame is provided with two clamping portions on the side facing the ball accommodating groove, and a first oil inlet channel is formed between the two clamping portions. During the working process of the bearing, the lubricating oil between the inner ring of the bearing and the bearing retainer can enter the first oil inlet channel under the action of gravity, centrifugal force and the rotating force of the balls, and gradually seep into the space between the balls and the clamping portions with the movement of the balls, thereby increasing the amount of lubricating oil between the balls and the bearing retainer, improving the lubricating effect between the balls and the bearing retainer, reducing the sliding friction between the balls and the bearing retainer, and helping to improve the service life of the balls and the bearing retainer. In addition, with the continuous rotation of the balls, the lubricating oil will be continuously extruded out of the ball accommodating groove under the continuous extrusion action of the balls, and the extruded lubricating oil will be supplemented into the ball accommodating groove through the first oil inlet channel, thereby providing protection for the durability and working stability of the bearing retainer.

[0017] 2. As a preferred embodiment of the present application, the clamping portion is arranged to extend from one end to the other end along the thickness direction of the frame body. On the one hand, the contact area between the ball and the clamping portion is increased, and the probability of force concentration caused by the small contact area between the ball and the clamping portion is reduced; on the other hand, a first oil inlet channel with a larger space can be formed between the two clamping portions, thereby increasing the lubricating oil storage capacity in the ball receiving groove; on this basis, the clamping portion is provided with a second oil inlet channel connected to the first oil inlet channel, so that the lubricating oil in the first oil inlet channel can move into the second oil inlet channel, so that the lubricating oil can more easily enter the gap between the ball and the clamping portion, thereby reducing the mutual wear between the ball and the bearing retainer, and improving the service life of the bearing retainer.

[0018] 3. As a preferred embodiment of the present application, the cross-sectional area of ​​the second oil inlet channel gradually decreases from the end connected to the first oil inlet channel toward the end away from the first oil inlet channel. With this arrangement, as the lubricating oil in the first oil inlet channel continues to flow into the second oil inlet channel, the space for the lubricating oil to move within the second oil inlet channel gradually decreases. The oil in the rear continuously applies pressure to the lubricating oil in the front, forcing the lubricating oil in the front out of the second oil inlet channel and subsequently moving between the ball and the clamping portion, significantly enhancing the lubricating effect of the lubricating oil on the ball and the bearing retainer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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:

[0020] Figure 1 This is a schematic structural diagram of a double-row ball bearing cage according to one embodiment of the present application;

[0021] Figure 2 for Figure 1 A magnified view of part A;

[0022] Figure 3 This is a cross-sectional view of a partial structure of a double-row ball bearing retainer according to one embodiment of the present application.

[0023] in:

[0024] 1 frame;

[0025] 2 partition racks, 21 weight reduction slots;

[0026] 3 ball receiving groove;

[0027] 4 clamping portion, 41 abutting surface;

[0028] 5. First oil inlet channel;

[0029] 6. Second oil inlet channel;

[0030] 7 transmission channels. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0032] The following description sets forth many specific details to facilitate a thorough understanding of the present application. However, the present application may also be implemented in other ways than those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features of each embodiment may be combined with each other unless there is a conflict.

[0033] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application.

[0034] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0036] like Figures 1 to 3As shown, a double-row ball bearing retainer is installed between the inner ring and the outer ring of the bearing, including two frame bodies 1 arranged side by side. The frame body 1 is annular and is divided into multiple ball receiving grooves 3 along its circumferential direction by a separator 2. The separator 2 has a clamping portion 4 protruding outward toward the ball receiving groove 3. There are two clamping portions 4 and they are spaced apart on both sides of the separator 2. A first oil inlet channel 5 is formed between the two adjacent clamping portions 4.

[0037] The double-row ball bearing cage of the present application includes two rows of frame bodies 1 arranged side by side, and a plurality of ball receiving grooves 3 are provided on each frame body 1 for receiving balls, and two adjacent ball receiving grooves 3 are separated by a partition frame 2, and the partition frame 2 is provided with two clamping parts 4 on the side facing the ball receiving groove 3, and a first oil inlet channel 5 is formed between the two clamping parts 4. During the operation of the bearing, the lubricating oil between the inner ring of the bearing and the bearing cage can enter the first oil inlet channel 5 under the action of gravity, centrifugal force and ball rotation force, and gradually moves along with the movement of the balls. And it seeps into the space between the ball and the clamping part 4, thereby increasing the amount of lubricating oil filling between the ball and the bearing cage, improving the lubrication effect between the ball and the bearing cage, reducing the sliding friction between the ball and the bearing cage, and helping to increase the service life of the ball and the bearing cage; in addition, as the ball continues to rotate, the lubricating oil will be continuously squeezed out of the ball receiving groove 3 by the continuous squeezing action of the ball, and the squeezed lubricating oil will be replenished into the ball receiving groove 3 through the first oil inlet channel 5, providing a guarantee for the durability and working stability of the bearing cage.

[0038] As a preferred embodiment of the present application, Figure 1 、 Figure 2 As shown, the clamping portion 4 extends from one end to the other end along the thickness direction of the frame 1 , and a second oil inlet channel 6 communicating with the first oil inlet channel 5 is opened on one side of the clamping portion 4 facing the ball receiving groove 3 .

[0039] The clamping portion 4 is arranged to extend from one end to the other end along the thickness direction of the frame 1. On the one hand, the contact area between the ball and the clamping portion 4 is increased, and the probability of force concentration caused by the small contact area between the ball and the clamping portion 4 is reduced; on the other hand, a first oil inlet channel 5 with a larger space can be formed between the two clamping portions 4, thereby increasing the lubricating oil storage capacity in the ball receiving groove 3; on this basis, the clamping portion 4 is provided with a second oil inlet channel 6 connected to the first oil inlet channel 5, so that the lubricating oil in the first oil inlet channel 5 can move into the second oil inlet channel 6, so that the lubricating oil can more easily enter the gap between the ball and the clamping portion 4, thereby reducing the mutual wear between the ball and the bearing retainer and improving the service life of the bearing retainer.

[0040] The present embodiment does not limit the extension form of the second oil inlet channel 6. The second oil inlet channel 6 can be set to be perpendicular to the first oil inlet channel 5, or the second oil inlet channel 6 can be set to form a certain angle with the first oil inlet channel 5; and the second oil inlet channel 6 can be set to be straight or curved.

[0041] As a preferred embodiment of this embodiment, Figure 2 、 Figure 3 As shown, the cross-sectional area of ​​the second oil inlet channel 6 gradually decreases from the end communicating with the first oil inlet channel 5 to the end away from the first oil inlet channel 5 .

[0042] With such arrangement, as the lubricating oil in the first oil inlet channel 5 continues to flow into the second oil inlet channel 6, the movement space of the lubricating oil in the second oil inlet channel 6 gradually shrinks, and the oil in the rear continuously applies pressure to the lubricating oil in the front. Therefore, the lubricating oil in the front will be squeezed out of the second oil inlet channel 6 and then move to between the ball and the clamping part 4, greatly enhancing the lubricating effect of the lubricating oil on the ball and the bearing retainer.

[0043] As another preferred embodiment under this embodiment, Figure 2 、 Figure 3 As shown, there are multiple second oil inlet channels 6. Providing multiple second oil inlet channels 6 can increase the flow of lubricating oil from the first oil inlet channel 5 to the second oil inlet channels 6. The oil in the multiple second oil inlet channels 6 can more easily enter between the balls and the bearing cage, improving the lubrication effect.

[0044] Preferably, if Figure 2 、 Figure 3 As shown, the second oil inlet channels 6 on the two clamping parts 4 on opposite sides are arranged symmetrically, so that the lubricating oil can evenly enter between the ball and the bearing cage from the second oil inlet channels 6 on both sides, thereby improving the lubrication uniformity of the lubricating oil and the smoothness of the ball's rotation.

[0045] As a preferred embodiment of the present application, Figures 1 to 3 As shown, a weight-reducing groove 21 is provided on the top surface of the partition frame 2 , and the weight-reducing groove 21 extends along the thickness direction of the frame body 1 .

[0046] By providing the weight-reducing grooves 21 , the weight of the partition frame 2 can be reduced, thereby reducing the overall weight of the bearing retainer, so that the balls can more easily drive the bearing retainer to rotate, thereby improving the smoothness of the rotation of the bearing retainer.

[0047] Preferably, if Figure 1 、 Figure 2As shown, the top surface of the spacer frame 2 also defines a transmission channel 7 connecting the weight-reducing groove 21 with the first oil inlet channel 5. During bearing rotation, the lubricating oil is affected by the bearing retainer and the balls, moving between the inner and outer rings. There is a certain probability that this oil will enter the weight-reducing groove 21. The lubricating oil in the weight-reducing groove 21 is then driven by the centrifugal force of the bearing retainer's rotation and enters the first oil inlet channel 5 through the transmission channel 7, thereby improving the smooth flow of the lubricating oil into the first oil inlet channel 5.

[0048] As a preferred embodiment of the present application, Figures 1 to 3 As shown, the clamping portion 4 has an arc-shaped abutment surface 41 facing the ball receiving groove 3. The arc-shaped abutment surface 41 can enhance the adaptability of the ball and the abutment surface 41, increase the contact area between the ball and the abutment surface 41, and thus reduce the probability of collision damage caused by the small contact area between the two.

[0049] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0050] 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.

[0051] 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 modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. A double-row ball bearing cage, mounted between the inner and outer rings of a bearing, characterized in that: It includes two frames arranged side by side, the frames are annular and are divided into multiple ball receiving grooves along their circumferential direction by a partition frame, the partition frame has a clamping part protruding outward toward the ball receiving groove, there are two clamping parts and they are spaced apart on both sides of the partition frame, and a first oil inlet channel is formed between the two adjacent clamping parts.

2. The double row ball bearing cage according to claim 1, characterized in that: The clamping portion extends from one end to the other end along the thickness direction of the frame body, and a second oil inlet channel communicating with the first oil inlet channel is opened on a side of the clamping portion facing the ball receiving groove.

3. The double row ball bearing cage according to claim 2, characterized in that: A cross-sectional area of ​​the second oil inlet passage gradually decreases from an end communicating with the first oil inlet passage toward an end away from the first oil inlet passage.

4. The double row ball bearing cage according to any one of claims 2 or 3, characterized in that: There are multiple second oil inlet channels.

5. The double row ball bearing cage according to any one of claims 2 or 3, characterized in that: The second oil inlet channels on the two clamping parts on opposite sides are symmetrically arranged.

6. The double row ball bearing cage according to claim 1, characterized in that: A weight-reducing groove is provided on the top surface of the partition frame, and the weight-reducing groove extends along the thickness direction of the frame body.

7. The double row ball bearing cage according to claim 6, characterized in that: The top surface of the partition frame is further provided with a transmission channel connecting the weight-reducing groove with the first oil inlet channel.

8. The double row ball bearing cage according to claim 1, characterized in that: The clamping portion has an abutting surface facing the ball receiving groove, and the abutting surface is arc-shaped.

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