A needle cage

Abstract

The application discloses a needle cage, which comprises coaxially arranged lower and upper ring structures connected by detachable fixing members; a plurality of pockets are distributed between the two ring structures in a circumferential direction, each pocket is formed with a needle pocket, the inner wall of the needle pocket is provided with axially extending wave-shaped compression-resistant protrusions, an oil storage cavity is located on the radially lower side of the needle pocket and is communicated with the needle pocket through an oil guide channel, and a through channel is arranged on the radially inner side of the needle pocket; each pocket is composed of inner / outer limiting clamping blocks, a supporting groove and an elastic locking member, wherein the supporting groove limits the axial displacement of the needle, and the elastic locking member restrains the radial displacement. The structure disperses vibration stress through the wave-shaped protrusions, realizes long-acting lubrication through the oil storage cavity, and prevents movement through double limiting, thereby significantly prolonging the service life of the bearing and improving the maintenance convenience.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission components, specifically to a needle roller retainer. Background Technology

[0002] The cage of a needle roller bearing is a crucial component. Its main function is to orderly separate, guide, and position the needle rollers within the bearing. The cage contains separating needle rollers and guiding needle rollers. The separating needle rollers prevent adjacent needle rollers from directly contacting, rubbing, and colliding during operation, thus reducing frictional heat, wear, and noise. The guiding needle rollers guide the needle rollers along the correct raceway during bearing operation, maintaining a stable trajectory and preventing needle roller misalignment or jamming.

[0003] Traditional needle roller cages typically have smooth inner walls in their pockets, making the needle rollers prone to abnormal wear due to vibration and friction during high-speed operation. Existing cages rely on external oil injection for lubrication, which fails to maintain a continuous oil film covering the needle roller surface and lacks a radial displacement buffering mechanism, easily leading to needle roller misalignment or jamming. Furthermore, integrated cages are costly to repair and replace, while split structures suffer from insufficient assembly stability. Therefore, there is an urgent need for a needle roller cage that combines vibration resistance, self-lubrication, and ease of maintenance. Utility Model Content

[0004] This utility model addresses the problems existing in the prior art by providing a needle roller retainer. It includes: a lower ring structure and an upper ring structure arranged coaxially;

[0005] Multiple pockets spaced circumferentially are connected between the lower ring structure and the upper ring structure;

[0006] Each of the pockets is formed with a needle pocket for receiving a needle roller, and the inner wall of the needle pocket is provided with a wave-shaped anti-compression protrusion.

[0007] The pocket is also provided with a through channel and an oil storage cavity, which is connected to the needle roller pocket.

[0008] Preferably, the pocket includes:

[0009] The inner and outer limit locking blocks are set relative to each other;

[0010] A slot connecting the inner limit locking block and the outer limit locking block;

[0011] An elastic locking element is provided below the bracket;

[0012] The elastic locking component has an upper connecting arc plate and a lower connecting arc plate on its upper and lower sides.

[0013] Preferably, the groove is positioned above the upper connecting arc plate to limit the axial displacement of the needle roller.

[0014] Preferably, the wave-shaped anti-compression protrusion extends along the axial direction of the needle roller pocket and undulates in a wave-like manner in the circumferential direction.

[0015] Preferably, the oil storage cavity is located radially lower than the needle roller pocket and is connected to the needle roller pocket through an oil guide channel.

[0016] Preferably, the lower ring structure and the upper ring structure are connected by a detachable fastener.

[0017] Preferably, the elastic locking element is an arc-shaped spring sheet, with its two ends fixed to the inner sidewalls of the upper connecting arc plate and the lower connecting arc plate, respectively.

[0018] Preferably, the through channel extends axially through the pocket and is located radially inside the needle roller pocket.

[0019] Preferably, the crest height of the wave-resistant protrusion is 1 / 10 to 1 / 5 of the diameter of the needle roller.

[0020] Preferably, the thickness of the arc-shaped spring sheet is 0.2-0.5 mm, and the pre-compression amount is 10%-15% of the free height.

[0021] Compared with the prior art, the present invention provides a needle roller retainer, which has the following advantages:

[0022] 1. The needle roller cage is equipped with a corrugated anti-compression protrusion structure inside, which can increase the contact area of ​​the needle rollers during operation, thereby dispersing stress and buffering vibration;

[0023] 2. The needle roller cage is equipped with an oil reservoir, which can continuously supply lubricating oil to the needle rollers, thereby reducing frictional loss. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0025] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the support arm structure in a specific embodiment of the present utility model;

[0027] Figure 3 This utility model Figure 1 A magnified view of a section at point A.

[0028] In the diagram: 1. Lower ring structure; 2. Pocket; 3. Upper ring structure; 4. Fixing component; 101. Through channel; 102. Inner wall of pocket; 103. Needle roller pocket; 104. Oil storage cavity; 105. Wave-shaped pressure-resistant protrusion; 201. Inner limiting locking block; 202. Support groove; 203. Outer limiting locking block; 204. Upper connecting arc plate; 205. Elastic locking component; 206. Lower connecting arc plate. Detailed Implementation

[0029] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0031] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0034] Example 1:

[0035] like Figure 1-3 As shown, it includes: a lower ring structure 1 and an upper ring structure 3 arranged coaxially; a plurality of pockets 2 distributed circumferentially and connected between the lower ring structure 1 and the upper ring structure 3; each pocket 2 has a needle pocket 103 for accommodating needle rollers, and the inner wall 102 of the needle pocket 103 is provided with a wave-shaped anti-compression protrusion 105; the wave-shaped anti-compression protrusion 105 is formed by the natural protrusion generated by the part during the stamping and stretching process, which together with the inner wall 102 of the needle roller limits the needle roller;

[0036] The pocket 2 is also provided with a through channel 101 and an oil storage cavity 104. The oil storage cavity 104 is connected to the needle roller pocket 103. The pocket 2 includes: an inner limiting locking block 201 and an outer limiting locking block 203 arranged opposite to each other; a groove 202 connecting the inner limiting locking block 201 and the outer limiting locking block 203; an elastic locking member 205 provided below the groove 202; and an upper connecting arc plate 204 and a lower connecting arc plate 206 provided on the upper and lower sides of the elastic locking member 205. The needle rollers are housed in the needle roller pocket 103, and the inner wall 102 is pressed with a wave-shaped anti-compression protrusion 105 with a peak height of 0.5mm. The oil reservoir 104 is located at the bottom of the needle roller pocket 103 and is lubricated by oil seepage through the microporous oil guide channel. The through channel 101 is located inside the needle roller pocket 103 to reduce the weight of the cage and assist in heat dissipation. The bracket 202 spans between the inner limit locking block 201 and the outer limit locking block 203 to lock the two ends of the needle rollers. The elastic locking element 205 is a stainless steel arc-shaped spring sheet that elastically deforms towards the oil reservoir 104 when compressed and resets and locks the needle rollers after release.

[0037] The assembly process of this needle roller cage is as follows:

[0038] The needle roller is placed into the needle roller pocket 103 of the pocket 2, and the needle roller is axially limited by the groove 202. Then, the elastic locking element 205 is deformed by the pressure of the needle roller, and after the needle roller is in place, the spring clip rebounds and locks its radial sides. The lower ring structure 1 and the upper ring structure 3 are locked by the fixing element 4, and the assembly is completed. At the same time, when the needle roller is running, the wave-shaped anti-pressure protrusion 105 absorbs the vibration energy, and the oil storage chamber 104 continuously supplies oil to form an oil film. The elastic locking element 205 maintains the locking force under the action of centrifugal force to prevent the needle roller from dislodging.

[0039] The inner side is provided with a wave-shaped pressure-resistant protrusion 105, which is formed by the automatic protrusion generated during the stamping and stretching process of the part.

[0040] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0041] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0042] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A needle roller retainer, characterized in that, include: The lower and upper circular ring structures are coaxially arranged. Multiple pockets spaced circumferentially are connected between the lower ring structure and the upper ring structure; Each of the pockets is formed with a needle pocket for receiving a needle roller, and the inner wall of the needle pocket is provided with a wave-shaped anti-compression protrusion. The pocket is also provided with a through channel and an oil storage chamber, which is connected to the needle roller pocket.

2. The needle roller retainer according to claim 1, characterized in that, The pocket includes: The inner and outer limit locking blocks are set relative to each other; A slot connecting the inner limit locking block and the outer limit locking block; An elastic locking element is provided below the bracket; The elastic locking component has an upper connecting arc plate and a lower connecting arc plate on its upper and lower sides.

3. The needle roller retainer according to claim 2, characterized in that, The groove is positioned above the upper connecting arc plate to limit the axial displacement of the needle roller.

4. The needle roller retainer according to claim 1, characterized in that, The wave-shaped anti-compression protrusions extend along the axial direction of the needle roller pocket and undulate in a wave-like manner in the circumferential direction.

5. The needle roller retainer according to claim 1, characterized in that, The oil storage chamber is located radially lower than the needle roller pocket and is connected to the needle roller pocket through an oil guide channel.

6. The needle roller retainer according to claim 1, characterized in that, The lower ring structure and the upper ring structure are connected by a detachable fastener.

7. The needle roller retainer according to claim 2, characterized in that, The elastic locking element is an arc-shaped spring sheet, with its two ends fixed to the inner sidewalls of the upper and lower connecting arc plates, respectively.

8. The needle roller retainer according to claim 1, characterized in that, The through channel extends axially through the pocket and is located radially inside the needle roller pocket.

9. The needle roller retainer according to claim 1, characterized in that, The height of the crest of the wave-resistant protrusion is 1 / 10 to 1 / 5 of the diameter of the needle roller.

10. The needle roller retainer according to claim 7, characterized in that, The thickness of the arc-shaped spring is 0.2-0.5 mm, and the pre-compression is 10%-15% of the free height.

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