A metal crown-type cage

Abstract

This utility model relates to the field of bearing technology and discloses a metal crown-type cage, including a cage body. One side of the cage body has multiple sets of equidistantly distributed pockets, and another side has multiple sets of equidistantly distributed receiving grooves, which are staggered with the pockets. During assembly, after the bearing rings and steel balls are assembled, the cage is inserted into the bearing, ensuring that both the pockets and receiving grooves contain steel balls. The bent claws are then bent so that the two claws on either side of the pockets move closer to the pockets, forming a lock. The claws near the receiving grooves are left untreated. The ratio of locked to unlocked steel balls is 1:3, meaning 75% of the steel balls are not locked, effectively reducing the friction area by 75% and decreasing the bearing's frictional torque. By bending and locking the steel balls after assembly, scratches on the steel balls are avoided.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, and more specifically, to a metal crown-type cage. Background Technology

[0002] Low-friction torque deep groove ball bearings are used in relatively precise transmission mechanisms. The bearings have very small torque and high sensitivity during operation, so a very low coefficient of friction is required.

[0003] Deep groove ball bearings typically use nylon cages to reduce friction. However, when considering increased strength and high / low temperature environments, polymer materials like nylon are still less reliable than metal materials. Therefore, in such environments, a metal crown cage structure is generally chosen. In this structure, only a small portion of the steel ball is contained within the cage pockets, resulting in a smaller contact area compared to a wave-shaped cage and lower frictional resistance. However, since each pocket of the cage is in contact with the bearing steel ball, the frictional resistance is still relatively high. Furthermore, because the claws of the crown cage pockets are pre-formed before the steel ball is installed, the steel ball needs to be slightly deformed by the claws to press into the pocket, which poses a risk of scratching the steel ball during installation. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a metal crown-shaped retainer.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a metal crown-shaped retainer, comprising a retainer body, wherein one side of the retainer body has multiple sets of equidistantly distributed pockets, and one side of the retainer body has multiple sets of equidistantly distributed receiving grooves, the receiving grooves and pockets being arranged alternately; multiple sets of equidistantly distributed fixing claws are fixedly connected to the side of the retainer body near the pockets, and multiple sets of equidistantly distributed curved claws are fixedly connected to the side of the retainer body near the fixing claws, with a groove formed between two adjacent curved claws.

[0006] As a preferred embodiment of this utility model, the number of pockets is one per group, and the multiple pockets are equidistantly distributed on the retainer body.

[0007] As a preferred embodiment of this utility model, the number of the receiving slots is three per group, and the multiple receiving slots are equidistantly distributed on the retainer body.

[0008] As a preferred embodiment of this utility model, the fixing claw is located between two adjacent receiving slots, and the fixing claw and the retainer body are an integral structure.

[0009] As a preferred technical solution of this utility model, the number of the curved claws is four in each group, and they are symmetrical about the pocket holes in pairs. The curved claws and the retainer body are an integral structure.

[0010] As a preferred embodiment of this utility model, the retainer body is made of a self-lubricating metal material.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: In this invention, during assembly, after the bearing rings and steel balls are assembled, the cage is installed inside the bearing so that both the pocket and the receiving groove contain steel balls. Then, the bent claws are bent so that the two bent claws on both sides of the pocket move closer to the pocket, thus forming a lock. The bent claws near the receiving groove are not treated. The ratio of locked to unlocked steel balls is 1:3, so 75% of the steel balls are not locked, which is equivalent to reducing the friction area by 75% and reducing the friction torque of the bearing. By bending and locking the steel balls after assembly, scratches on the steel balls are avoided. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the retainer structure after the steel balls are installed in this utility model.

[0013] In the diagram: 41, retainer; 42, curved claw; 43, pocket; 44, fixing claw; 45, receiving slot. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] like Figures 1 to 2 As shown, this utility model provides a metal crown-type retainer, including a retainer body 41. A plurality of equidistant pockets 43 are provided on one side of the retainer body 41, and a plurality of equidistant receiving grooves 45 are provided on one side of the retainer body 41, and the receiving grooves 45 and pockets 43 are arranged alternately. A plurality of equidistant fixing claws 44 are fixedly connected to the side of the retainer body 41 near the pockets 43, and a plurality of equidistant curved claws 42 are fixedly connected to the side of the retainer body 41 near the fixing claws 44, and a groove is formed between two adjacent curved claws 42.

[0016] The number of pockets 43 is one per group, and multiple pockets 43 are equidistantly distributed on the retainer body 41.

[0017] The number of receiving slots 45 is three per group, and the multiple receiving slots 45 are equidistantly distributed on the retainer body 41.

[0018] The fixing claw 44 is located between two adjacent receiving slots 45, and the fixing claw 44 and the retainer body 41 are an integral structure.

[0019] The number of curved claws 42 is four in each group, and they are symmetrical about the pocket 43 in pairs. The curved claws 42 and the retainer body 41 are an integral structure.

[0020] The retainer 41 is made of self-lubricating metal material.

[0021] Working principle and usage process of this utility model: In this application, during assembly, after the bearing rings and steel balls are assembled, the cage is installed inside the bearing so that both the pocket 43 and the receiving groove 45 contain steel balls. Then, the bent claws 42 are bent so that the two bent claws 42 on both sides of the pocket 43 move closer to the pocket 43 to form a lock. The bent claws 42 near the receiving groove 45 are not treated. The ratio of locked steel balls to unlocked steel balls is 1:3, so 75% of the steel balls are not locked, which is equivalent to reducing the friction area by 75% and reducing the friction torque of the bearing. By bending and locking the steel balls after assembly, scratches on the steel balls are avoided.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A metal crown-type retainer, comprising a retainer body (41), characterized in that: The retainer body (41) has multiple sets of equally spaced pockets (43) on one side, and multiple sets of equally spaced receiving grooves (45) on one side, with the receiving grooves (45) and pockets (43) arranged alternately. Multiple sets of equally spaced fixing claws (44) are fixedly connected to the side of the retainer body (41) near the pockets (43), and multiple sets of equally spaced curved claws (42) are fixedly connected to the side of the retainer body (41) near the fixing claws (44), with a groove formed between two adjacent curved claws (42).

2. The metal crown-type retainer according to claim 1, characterized in that: The number of pockets (43) is one per group, and multiple pockets (43) are equidistantly distributed on the retainer body (41).

3. A metal crown-type retainer according to claim 1, characterized in that: The number of the receiving slots (45) is three per group, and the multiple receiving slots (45) are equidistantly distributed on the retainer body (41).

4. A metal crown-type retainer according to claim 1, characterized in that: The fixing claw (44) is located between two adjacent receiving slots (45), and the fixing claw (44) and the retainer body (41) are an integral structure.

5. A metal crown-type retainer according to claim 1, characterized in that: The number of the curved claws (42) is four in each group, and they are symmetrical about the pocket (43) in pairs. The curved claws (42) and the retainer body (41) are an integral structure.

6. A metal crown-type retainer according to claim 1, characterized in that: The retainer (41) is made of a self-lubricating metal material.

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