CN-121977020-A - High-strength thin-wall bearing retainer structure

CN121977020ACN 121977020 ACN121977020 ACN 121977020ACN-121977020-A

Abstract

The application discloses a high-strength thin-wall bearing retainer structure, which comprises a barrel ring body, wherein a horizontal torsion-resistant ring is integrally formed on the inner side of the bottom of the barrel ring body, an arc transition structure is adopted at the joint of the horizontal torsion-resistant ring and the barrel ring body, a reinforcing part is arranged at the position of the barrel ring body corresponding to each window beam, one end of the reinforcing part is connected with the window beam, the other end of the reinforcing part extends to the horizontal torsion-resistant ring and is connected with the horizontal torsion-resistant ring, a mechanical conduction path of the window beam and the horizontal torsion-resistant ring is constructed through the reinforcing part, the rigidity, the shock resistance and the eversion deformation resistance of the integral structure of the retainer are improved, the horizontal torsion-resistant ring is arranged on the barrel ring body, and the reinforcing part connected with the torsion-resistant ring is arranged at the window beam, so that a stress conduction path is constructed. The integrated forming device can disperse impact and centrifugal stress born by the window beam into a whole, greatly improve the anti-eversion and anti-deformation capacity, inhibit plastic deformation of the window beam, ensure pocket precision and steel ball movement stability, ensure that the integrated forming device does not increase assembly space, and has light weight and structural strength, thereby being suitable for complex working conditions of the robot joint.

Inventors

ZHENG GUANGHUI
ZHENG JINYU

Assignees

山东金帝精密机械科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260130

Claims (10)

1. The high-strength thin-wall bearing retainer structure comprises a barrel ring body, wherein a plurality of window holes for accommodating rolling bodies are formed in the barrel ring body along the radial direction, the window holes are uniformly distributed along the circumferential direction of the barrel ring body, one end of each window hole is in an opening structure, and a window beam is formed between two adjacent window holes; the horizontal torsion-resistant ring is characterized in that a horizontal torsion-resistant ring is integrally formed at the bottom of the barrel ring body, an arc-shaped transition structure is adopted at the joint of the horizontal torsion-resistant ring and the barrel ring body, a reinforcing part is arranged at the position of the barrel ring body corresponding to each window beam, one end of the reinforcing part is connected with the window beam, the other end of the reinforcing part extends to the horizontal torsion-resistant ring and is connected with the horizontal torsion-resistant ring, a mechanical conduction path of the window beam and the horizontal torsion-resistant ring is constructed through the reinforcing part, and the rigidity, the shock resistance and the anti-eversion deformation capacity of the integral structure of the retainer are improved.
2. The high-strength thin-wall bearing retainer structure according to claim 1, wherein the reinforcing part is formed by partially recessing the cylindrical ring body at a position corresponding to the window beam, so that a first groove which is radially inward is formed on the outer wall side of the cylindrical ring body, the first groove extends from the upper end of the window beam to the bottom of the horizontal torsion-resistant ring, a first convex rib is formed on the inner wall side of the cylindrical ring body, the first convex rib is connected with the horizontal torsion-resistant ring, the overall structural strength and the anti-eversion deformation capability of the retainer are enhanced, the movement track precision of rolling bodies in window holes is guaranteed, and the load bearing capability of the thin-wall bearing is improved.
3. The high-strength thin-wall bearing retainer structure according to claim 2, wherein the first groove is divided into three sections, namely a first groove section formed on the side of the window Liang Waibi, a second groove section formed on the rounded transition area and a third groove section formed on the side of the outer wall of the horizontal torsion-resistant ring, the groove width of the first groove section is a constant value, the groove width of the second groove section is gradually increased along the extending direction of the groove, the groove width of the third groove section is gradually increased along the extending direction of the groove, the groove depth of the first groove section is a constant value, the groove depth of the second groove section is gradually decreased along the extending direction of the groove, and the groove depth of the third groove section is gradually decreased along the extending direction of the groove.
4. The high-strength thin-wall bearing retainer structure according to claim 1, wherein the reinforcing part is formed by protruding the part of the cylindrical ring body corresponding to the window beam, so that a second convex rib is formed on the outer wall side of the cylindrical ring body, the second convex rib extends from the upper end of the window beam to the bottom of the horizontal torsion-resistant ring, a second groove is formed on the inner wall side of the cylindrical ring body, the second convex rib is connected with the horizontal torsion-resistant ring, the overall structural strength and the anti-eversion deformation capability of the retainer are enhanced, the movement track precision of the rolling body in the window hole is guaranteed, and the load bearing capability of the thin-wall bearing is improved.
5. The high strength thin wall bearing retainer structure according to claim 4, wherein the second rib is divided into two sections, which are a first convex section formed on the side of the window Liang Waibi and a second convex section formed on the rounded transition area, the height of the first convex section is a constant value, and the height of the second convex section is gradually reduced and is an arc-shaped protrusion adapted to the rounded transition area.
6. The high strength thin wall bearing retainer structure according to claim 1, wherein the reinforcing portion is formed by locally thickening the window beam, and the reinforcing portion is arranged in equal diameter or gradually increases in width along the direction from the window beam to the horizontal torsion ring.
7. The high strength thin wall bearing retainer structure of claim 1 wherein the ends of the reinforcement portion are notched.
8. The high strength thin wall bearing cage structure of claim 1 wherein the cartridge ring body is provided with one or more reinforcements disposed parallel to or at an angle to the cage axis.
9. The high-strength thin-walled bearing holder structure of claim 1, wherein the horizontal torsion ring is alternately provided with thick sections and thin sections in the circumferential direction, the thick sections being provided corresponding to the reinforcing portions.
10. The high strength thin wall bearing retainer structure of claim 1 wherein the horizontal torsion ring is provided with oil storage grooves between adjacent reinforcing portions.

Description

High-strength thin-wall bearing retainer structure Technical Field The application belongs to the field of bearing retainers, and particularly relates to a high-strength thin-wall bearing retainer structure. Background In the field of industrial robots, the joints are used as core units for motion transmission and posture adjustment, and extremely high requirements are put on the precision, space adaptability and bearing capacity of a matched bearing assembly. The thin-wall bearing has the advantages that by means of the structural characteristics of high precision and thinning, the installation space inside the joint can be effectively reduced, the high bearing requirement caused by frequent start and stop and direction change in the movement of the robot can be met, and the thin-wall bearing becomes a key part of the joint of the robot. In order to match the structural design of the thin-wall bearing and the light weight and ensure the stable running of the rolling bodies (steel balls), a crown-shaped retainer with a single-side opening is commonly adopted in the industry. The retainer realizes the limit and guide of the steel balls by arranging the pockets at intervals in the circumferential direction, and the open type structure greatly simplifies the assembly process and realizes the light weight, so the retainer is widely applied to the field of thin-wall bearings. The actual operation conditions of the robot joints are very complex. On one hand, in the starting and stopping process of the robot joint, the steel balls collide with the inner wall of the pocket hole, impact force directly acts on the window beam of the retainer, so that the retainer is subjected to cyclic impact stress for a long time, material fatigue is easily caused, plastic deformation is easily generated, on the other hand, centrifugal force generated by high-speed rotation of the bearing drives the retainer to integrally generate an outward expansion trend, acting force of the trend is concentrated on the weak part of the window beam, and the retainer adopts a thinning design, so that the deformation risk of the window beam is further increased. Once the window beam is deformed, the shape and the dimensional accuracy of the pocket hole are damaged, so that the movement track of the steel balls in the pocket hole deviates from a preset path, and the running stability of the bearing is affected. In summary, there is a need to optimize and strengthen the overall structure of the thin-wall cage to adapt to the complex and severe working condition of the robot joint, ensure the long-term stable operation of the thin-wall bearing, and still have a space for further improvement and lifting in the prior art. Disclosure of Invention The invention provides a high-strength thin-wall bearing retainer structure, which solves the problems that the strength bottom of a window beam of a thin-wall retainer for an industrial robot joint thin-wall bearing is easy to deform, so that the movement track of steel balls is deviated, and the running stability of the bearing is influenced. In order to achieve the above purpose, the present invention provides the following technical solutions: a high-strength thin-wall bearing retainer structure comprises a barrel ring body, wherein a plurality of window holes for accommodating rolling bodies are formed in the barrel ring body along the radial direction, the window holes are uniformly distributed along the circumferential direction of the barrel ring body, one end of each window hole is of an opening structure, window beams are formed between two adjacent window holes, a horizontal torsion-resistant ring is integrally formed at the bottom of the barrel ring body, an arc-shaped transition structure is adopted at the joint of the horizontal torsion-resistant ring and the barrel ring body, reinforcing parts are arranged at the positions of the barrel ring body corresponding to the window beams, one end of each reinforcing part is connected with the window beam, the other end of each reinforcing part extends to the horizontal torsion-resistant ring and is connected with the horizontal torsion-resistant ring, and a mechanical conduction path of the window beam and the horizontal torsion-resistant ring is constructed through the reinforcing parts, so that the integral structural rigidity, the shock resistance and the anti-eversion deformation capacity of the retainer are improved. In a preferred implementation mode, the reinforcing part is formed by partially sinking the position of the cylindrical ring body corresponding to the window beam, so that a first groove which is radially inward is formed on the outer wall side of the cylindrical ring body, the first groove extends from the upper end of the window beam to the bottom of the horizontal torsion-resistant ring, a first convex rib is formed on the inner wall side of the cylindrical ring body, the first convex rib is connected with the horizontal torsion-resi