Nylon retainer with locking openings in pockets of flexible bearing part

Abstract

The utility model relates to the technical field of bearings, in particular to a nylon retainer with locking openings for partial pockets of a flexible bearing, which comprises a retainer body, a plurality of pockets capable of mounting rolling bodies are arranged on the retainer body, and locking openings are arranged on partial pockets. The pockets with the locking openings are evenly distributed in the retainer body in a staggered mode at intervals of one or more pockets without the locking openings. According to the utility model, the retainer can be prevented from falling off freely, and meanwhile, the retainer with the pocket provided with the lock mouth can be produced by slightly changing the original cylindrical straight pocket die, so that a new set of die does not need to be manufactured again, and the enterprise cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, and specifically relates to a flexible bearing partial pocket with a locking nylon cage. Background Art

[0002] A flexible bearing is a special thin-walled bearing, mainly used on the generator of a harmonic reducer. In the early years, the main structural form of the cage used in bearings was a straight cylindrical cage without a locking notch. This cage structure could only play a role in isolating steel balls in the circumferential direction and was prone to falling off when placed horizontally. When inspecting the finished product accuracy and measuring vibration, it could only be carried out in the state without installing the cage. Therefore, the measured vibration value was quite different from that in the working state with the cage, and due to the large amount of cage movement, it would have an adverse impact on the vibration of the bearing. At the same time, in order to prevent the cage from falling off during the operation of the bearing, a retaining ring needs to be installed on one side close to the end face of the cage for positioning, which makes the end face on one side of the bottom of the cage higher than the end face of the bearing race.

[0003] With the development of the robot industry, the application of harmonic reducers is becoming more and more extensive, and higher requirements are put forward for the convenience of detecting and installing supporting flexible bearings. At the same time, the requirements for vibration and noise levels are also getting higher and higher. In order to meet these requirements, some domestic manufacturers have also optimized the structure of the cage, and there have emerged nylon cages with spherical pockets with full locking notches and spherical pockets with four locking notches. The application of these cages facilitates the detection and installation of bearings, and at the same time improves the vibration and noise levels of the bearings. However, due to the complex structure of these new cage structures, the cost of mold development is also relatively high. Content of the Utility Model

[0004] The purpose of the utility model is to provide a nylon cage for a flexible bearing to solve the problems raised in the above background art.

[0005] In order to achieve the above purpose, the technical solution of the utility model provides a flexible bearing partial pocket with a locking nylon cage, including a cage body. A plurality of pockets for installing rolling elements are provided on the cage body, and locking notches are provided on some of the pockets. The pockets with the locking notches are staggered and evenly distributed on the cage body at intervals of one or more pockets without the locking notches.

[0006] Preferably, four to six of the pockets are provided with the locking notches.

[0007] Preferably, the pockets without the locking notches are straight cylindrical pockets.

[0008] Preferably, the cage body is made of PA66 nylon.

[0009] Preferably, the size of the pockets is 1.07 - 1.09 times the diameter of the rolling elements.

[0010] Preferably, the size of the locking opening is 0.94 to 0.96 times the diameter of the rolling element.

[0011] Preferably, the overall cage body is in an annular structure.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model adds four to six structures with locking openings to the cylindrical straight pocket holes of the existing flexible bearing nylon cage, which can prevent the cage from falling off freely. At the same time, the original cylindrical straight pocket hole mold can be slightly modified to produce a cage with locking openings in the pocket holes, without the need to make a new set of molds, saving the enterprise cost. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is a schematic cross-sectional structural diagram of the present utility model.

[0015] Reference numerals: 1, cage body; 2, locking opening; 3, pocket hole; 4, steel ball. Detailed Embodiments

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0017] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0018] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0019] The present invention discloses a flexible bearing partially pocketed nylon retainer with locking notches, comprising a retainer body 1. The retainer body 1 is generally annular in shape. Four to six cylindrical pockets 3 with locking points are arranged along the annular surface of the retainer body 1, interspersed with several pockets 3 without locking notches 2 (straight-cylinder-shaped pockets), staggered and evenly distributed around the circumference. The dimensions of the pockets 3 match those of the steel balls 4 (rolling elements) used in the bearing. The pockets 3 are evenly spaced along the retainer body 1, which is injection molded.

[0020] The utility model is designed to improve the vibration and noise levels of the flexible bearing originally using a straight-cylinder nylon retainer, while also ensuring that the retainer will not fall off, making it convenient for inspection and testing. Compared with the flexible bearing nylon retainer of the same type with locking points, the pocket 3 of this structure is simple in structure. After adding four to six locking points, the mold originally developed for the straight-cylinder pocket retainer without locking points only needs to be simply modified before it can be used, without the need to re-open the mold, thus saving enterprise costs.

[0021] For details, please refer to Figure 1-2 The present invention provides a technical solution: a flexible bearing nylon retainer, comprising a retainer body 1 having an overall annular structure. Disposed along the annular surface of the retainer body 1 are four to six cylindrical pockets 3 with locking points and several cylindrical pockets 3 without locking openings 2. The pockets 3 are sized to match the steel balls 4 used in the bearings, and the locking openings 2 are sized to match the steel balls 4 used in the bearings. Several pockets 3 are spaced between the pockets 3 and evenly distributed along the retainer body 1. The retainer body 1 is made of PA66 nylon.

[0022] Furthermore, the shape of the ball pocket (pocket hole 3) includes a cylindrical straight hole with a locking point and a cylindrical straight hole without a locking point.

[0023] Furthermore, the center of the ring of the retainer body 1 coincides with the rotation center of the bearing.

[0024] Furthermore, the width of the ball pocket (pocket hole 3) is 1.07 to 1.09 times the diameter of the steel ball 4 used in the bearing.

[0025] Furthermore, the width of the lock opening 2 is 0.94 to 0.96 times the diameter of the steel ball 4 used in the bearing.

[0026] Working principle: The steel balls 4 used in the bearing are evenly distributed in the ball pocket (pocket hole 3), and the cage rotates with the steel balls 4. The size of the steel balls 4 is larger than the lock mouth 2, which can prevent the cage from falling off.

[0027] Compared with the traditional cage structure, in this solution, four to six locking points are added at the openings of the original cylindrical straight pockets 3, effectively preventing the cage from falling off during operation. At the same time, the original cylindrical straight pocket 3 mold can produce the cage with locking mouths 2 on the pockets 3 with minor modifications, without the need to make a new set of molds, saving the enterprise costs.

[0028] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible bearing partial pocket with a locked mouth nylon cage, characterized in that It includes a cage body (1), and a plurality of pockets (3) for installing rolling elements are provided on the cage body (1). Among them, some of the pockets (3) are provided with locking openings (2), and the pockets (3) with the locking openings (2) are staggered and evenly distributed on the cage body (1) with an interval of one or more pockets (3) without the locking openings (2); the pockets (3) without the locking openings (2) are straight cylindrical pockets.

2. A flexible bearing partial pocket with a locked mouth nylon cage according to claim 1, characterized in that, Four to six of the pockets (3) are provided with the locking openings (2).

3. A flexible bearing partial pocket with locked mouth nylon cage according to claim 1, characterized in that, The cage body (1) is made of PA66 nylon.

4. A flexible bearing partial pocket with a locked mouth nylon cage according to claim 1, characterized in that, The size of the pocket (3) is 1.07 - 1.09 times the diameter of the rolling element.

5. A flexible bearing partial pocket with a locked mouth nylon cage according to claim 1, characterized in that, The size of the locking opening (2) is 0.94 - 0.96 times the diameter of the rolling element.

6. A flexible bearing partial pocket with a locked opening nylon cage according to claim 1, characterized in that The cage body (1) is integrally in an annular structure.

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