Flexible bearing retainer

Abstract

The utility model relates to a flexible bearing retainer which comprises an annular retainer main body and a plurality of separation columns which are arranged at intervals and axially extend outwards from one side of the retainer main body, pockets for placing balls are formed between adjacent separation columns, the pockets comprise a first pocket and a second pocket, the first pocket is cylindrical, and the second pocket is cylindrical. The axial direction of the cylinder is the same as the axial direction of the retainer, the lower portions of the second pockets are arranged in a cylindrical mode, the axial direction of the lower cylinder is the same as the axial direction of the retainer, the upper portions of the second pockets are arranged in a hemispherical mode, and the diameter of the upper hemisphere is the same as that of the lower cylinder. The composite pockets are distributed among the cylindrical pockets, the diameter of the upper opening is smaller than the diameter of the ball to form the locking opening, so that the retainer is prevented from being separated from the ball from the locking opening and loosely sleeved, the pockets are in cambered surface contact with the ball body, frictional wear between the ball body and the retainer can be reduced to the greatest extent, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] The utility model relates to a retaining frame of a flexible bearing. Background Art

[0002] Flexible rolling bearings use the controllable elastic deformation of flexible elements to transmit motion and power. They are characterized by large transmission ratio, wide application range, high precision, small backlash, large load capacity, high efficiency, small size, light weight, smooth transmission, low noise, and the ability to transmit motion in a sealed space. The pockets of existing flexible bearings are mostly cylindrical, such as the public document CN109676944A and the patent document ZL2016201708572. The pockets are cylindrical, and the axial direction of the column is perpendicular to the axial direction of the cage. A lock is set at the port of the pocket, or several pockets with locks are set to prevent loosening. The opening of the lock is reduced. However, the contact surface between the ball and the side wall of the pocket is still flat, and there is still a certain wear problem. Utility Model Content

[0003] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides a flexible bearing retainer which reduces the wear problem and increases the life of the bearing.

[0004] The utility model is realized by the following technical solutions:

[0005] A flexible bearing retainer comprises an annular retainer body, a plurality of spacer columns which are arranged at intervals and extend axially outward from one side of the retainer body, pockets for accommodating balls are formed between adjacent spacer columns, the pockets comprising a first pocket and a second pocket, the first pocket being arranged in a cylindrical shape, the axial direction of the cylinder being the same as the axial direction of the retainer, the second pocket being arranged in a lower cylindrical shape, the axial direction of the lower cylinder being the same as the axial direction of the retainer, the second pocket being arranged in an upper hemispherical shape, the diameter of the upper hemispherical shape being the same as the diameter of the lower cylinder, the opening diameter of the upper hemispherical shape being smaller than the diameter of the steel ball to form a locking opening.

[0006] Preferably, the number of the second pockets is less than that of the first pockets, and the second pockets are arranged between the first pockets at intervals.

[0007] Preferably, an arc chamfer is formed between the bottom surface and the side surface of the first pocket hole and the second pocket hole.

[0008] Preferably, arc-shaped clamping surfaces are respectively provided on both sides of the locking opening of the second pocket hole.

[0009] The pockets are provided with two shapes, one is cylindrical, the axial direction of the cylinder is in the same direction as the bearing direction of the cage, and the other is a composite shape, which is a combination of a cylindrical shape and a hemispherical shape, the lower part is cylindrical, the axial direction of the cylindrical shape is in the same direction as the axial direction of the cage, and the upper part is hemispherical, the diameter of the hemispherical shape is the same as the diameter of the cylindrical shape, so that the hemispherical shape and the cylindrical shape can be smoothly connected when they are connected. The hemispherical shape of the upper part of the composite pocket is mainly used to provide a lock to prevent the cage from falling off the bearing. Moreover, the contact surface between the pocket and the ball body of the utility model is an arc surface, which can minimize the friction and wear between the ball and the cage.

[0010] The beneficial effects of the utility model are as follows: the utility model realizes the locking function by distributing the composite pockets between the cylindrical pockets, avoids the loosening of the retaining frame, and the pockets and the ball bodies are in arc surface contact, which can minimize the friction and wear between the ball bodies and the retaining frame and increase the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0012] Figure 2 yes Figure 1 Partial side view structural schematic diagram. DETAILED DESCRIPTION

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0014] like Figure 1 , 2 As shown, a flexible bearing retainer includes an annular retainer body 4, a plurality of spacers 3 arranged at intervals and extending axially outward from one side of the retainer body, and pockets for placing balls are formed between adjacent spacers, and the pockets include a first pocket 1 and a second pocket 2. The first pocket 1 is cylindrically arranged, and the axial direction of the cylinder is in the same direction as the axial direction of the retainer, that is, when the retainer is placed horizontally, the cylinder is arranged vertically, and the diameter from the bottom of the first pocket to the top opening is the same. The second pocket 2 is arranged in a composite shape, the lower part 5 of the second pocket is cylindrically arranged, the axial direction of the lower cylinder is in the same direction as the axial direction of the retainer, the upper part 7 of the second pocket is hemispherical, and the diameter of the upper hemispherical is the same as the diameter of the lower cylinder, and the opening diameter of the upper hemispherical is smaller than the diameter of the steel ball to form a lock. In this way, the upper hemispherical can be smoothly connected to the lower part, and due to the upper hemispherical arrangement, the top opening of the hemispherical is the lock, and the ball can be well limited in the second pocket. The two sides of the lock mouth of the second pocket hole are respectively provided with arc-shaped clamping surfaces 6. The bottom surface and the side surface of the first pocket hole and the second pocket hole are connected with an arc-shaped chamfer. The number of the second pocket holes 2 is less than the first pocket hole 1, and the second pocket holes are arranged between the first pocket holes at intervals.

[0015] The pockets are provided with two shapes, one is cylindrical, and the other is a composite shape, which is a combination of a cylindrical shape and a hemispherical shape. The lower part 5 is cylindrical, and the upper part 7 is hemispherical. The diameter of the hemispherical shape is the same as the diameter of the cylindrical shape, so that the hemispherical shape and the cylindrical shape can be smoothly connected when they are connected. The hemispherical shape of the upper part of the composite pocket is mainly used to provide a lock to prevent the cage from loosening. Moreover, the contact surface between the pocket and the ball body of the utility model is an arc surface, which can minimize the friction and wear between the ball and the cage, and improve the service life of the bearing.

[0016] The cage of the utility model is no longer limited to the spherical or transverse cylindrical pockets in the prior art, and can be set to a longitudinal cylindrical shape, and the position of the ball is locked by arranging several composite pockets at intervals in the cylindrical pocket. The composite pocket is a combination of a cylindrical shape and a hemispherical shape. The hemispherical shape plays a locking role at the port to prevent the cage from loosening during operation. In addition, the surfaces of the utility model that contact the ball body are all arc surfaces, which greatly reduces wear.

Claims

1. A flexible bearing cage, comprising an annular cage body, a plurality of spacers arranged at intervals and extending axially outward from one side of the cage body, pockets for placing balls are formed between adjacent spacers, and the characteristics are: The pocket hole includes a first pocket hole and a second pocket hole. The first pocket hole is cylindrically arranged, and the axial direction of the cylinder is in the same direction as the axial direction of the retaining frame. The second pocket hole is cylindrically arranged at the bottom, and the axial direction of the lower cylinder is in the same direction as the axial direction of the retaining frame. The second pocket hole is hemispherically arranged at the top, and the diameter of the upper hemisphere is the same as the diameter of the lower cylinder. The opening diameter of the upper hemisphere is smaller than the diameter of the steel ball to form a locking mouth.

2. A flexible bearing retainer according to claim 1, characterized in that: The number of the second pocket holes is less than that of the first pocket holes, and the second pocket holes are arranged between the first pocket holes at intervals.

3. A flexible bearing retainer according to claim 2, characterized in that: The bottom surfaces and side surfaces of the first pocket hole and the second pocket hole are connected with arc-shaped chamfers.

4. A flexible bearing retainer according to claim 3, characterized in that: Arc-shaped clamping surfaces are respectively arranged on both sides of the locking opening of the second pocket hole.

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