Dustproof rod end joint bearing

Abstract

The utility model relates to a dustproof rod end joint bearing which comprises a bearing outer ring, a retainer and a ball body, the ball body is installed on the inner side of the retainer, the retainer is installed on the inner side of the bearing outer ring, a dustproof ring is installed on the bearing outer ring and made of elastic materials, the right end of the bearing outer ring is fixedly connected with an installation ring, and a clamping groove is formed in the outer side of the installation ring. A connecting ring is fixedly connected to the dustproof ring, a clamping ring is fixedly connected to the connecting ring, the clamping ring is clamped to the inner side of the clamping groove, a swing rod is fixedly connected to the right end of the ball and penetrates out of the dustproof ring, two annular grooves are formed in the right end of the dustproof ring, the annular grooves and an inner hole of the dustproof ring are concentric circles, and the distance between the two ends of each annular groove is gradually expanded from left to right. A protruding ring is fixedly connected to the position, corresponding to the annular groove, of the left end of the dustproof ring and matched with the annular groove, the annular groove and the protruding ring are matched to form a wavy fold, the dustproof ring can be tightly attached to the swing rod all the time, and the dustproof effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of joint bearings, in particular to a dustproof rod end joint bearing. Background Art

[0002] The utility model patent with application number: CN201620943575.1 discloses a rod end joint bearing, including a bearing outer ring, a retainer and a ball. A first internal thread is provided at the contact point between the bearing outer ring and the retainer, and a first external thread is provided on the outer cylindrical surface of the retainer. The first internal thread is threadedly matched with the first external thread; and the first internal thread is threadedly matched with the first external thread. When assembling the rod end joint bearing, the above technical solution screws the retainer into the first internal thread of the bearing outer ring through the first external thread to realize the assembly of the retainer and the bearing outer ring, and then presses the ball into the retainer by pressurization to complete the assembly of the bearing. Through the threaded connection, the retainer and the bearing outer ring are easy to install, and have the advantage of being removable, which is conducive to the maintenance of the bearing. Once the bearing outer ring is damaged, it is also convenient to replace it, so that the entire joint bearing does not need to be replaced. However, for joint bearings, they often fail due to sealing problems, and dust and other debris often enter the mating surface, causing the mating surface to be damaged or even stuck, and also shortening the service life of the joint bearing. Utility Model Content

[0003] The utility model aims to solve the problems existing in the above-mentioned prior art and provides a dustproof rod end spherical bearing with a dustproof ring, which can effectively prevent debris from entering the matching surface of the inner ring and the retaining frame, thereby greatly increasing the service life of the spherical bearing.

[0004] The utility model adopts a technical solution to solve its technical problems: the dustproof rod end joint bearing comprises a bearing outer ring, a retaining frame and a ball, the ball is mounted on the inner side of the retaining frame, the retaining frame is mounted on the inner side of the bearing outer ring, a dustproof ring is mounted on the bearing outer ring, the dustproof ring is made of elastic material, a mounting ring is fixedly connected to the right end of the bearing outer ring, a clamping groove is opened on the outer side of the mounting ring, a connecting ring is fixedly connected to the left end of the dustproof ring, a clamping ring is fixedly connected to the inner side of the connecting ring, the clamping ring is clamped on the inner side of the clamping groove, a swing rod is fixedly connected to the right end of the ball, the swing rod passes through the dustproof ring, two annular grooves are opened on the right end of the dustproof ring, the annular grooves and the inner hole of the dustproof ring are concentric circles, and the distance between the two ends of the annular grooves is from left to right Gradually expands, the distance between the end of the ring groove close to the pendulum rod and the end away from the pendulum rod gradually increases from left to right, a convex ring is fixedly connected to the corresponding part of the ring groove on the left end of the dust ring, the convex ring is adapted to the ring groove, and the distance between the end of the convex ring close to the pendulum rod and the end away from the pendulum rod gradually increases from left to right, the ring groove and the convex ring cooperate with each other to form a wavy annular fold, the wavy fold makes it easier for the pendulum rod to push the dust ring when the ball rotates back and forth, left and right, and the wavy fold makes the dust ring have an inward expansion force, so that the dust ring can always be close to the pendulum rod, with good dustproof effect, and the wavy fold design makes it easier for the dust ring to return to its original state, and it is not easy for the dust ring to get stuck and not rebound.

[0005] For further improvement, an arcuate annular groove is provided at the connection between the rocker arm and the sphere. Even if debris enters the dust ring, it can accumulate at the arcuate annular groove to avoid entering the matching surface of the inner ring and the retaining frame.

[0006] Further improvement, the inner side of the bearing outer ring is provided with an internal thread, and the outer side of the retaining frame is provided with an external thread, and the internal thread and the external thread are matched and connected. The threaded connection makes it easy to install the retaining frame and the bearing outer ring, and has the advantage of being removable, which is beneficial to the maintenance of the bearing. Once the bearing outer ring is damaged, it is also convenient to replace it, without having to replace the entire joint bearing. The threaded connection makes the connection between the outer ring and the retaining frame tighter, the pull-out force becomes larger, and it is more firm and reliable.

[0007] Further improvement, the dust ring is made of rubber.

[0008] Further improvement, the ratio of the diameter of the sphere to the diameter of the pendulum rod is greater than 2:1, so that the sphere can swing at a larger angle.

[0009] For further improvement, the right end of the swing rod is fixedly connected with a screw rod.

[0010] For further improvement, a stopper is fixedly connected to the outer side of the swing rod, and the stopper can play a positioning role when the screw rod is installed.

[0011] For further improvement, a through hole is provided on the screw rod, so that when the screw rod is installed on the part, a positioning pin can be inserted into the through hole to make the connection between the screw rod and the part more secure.

[0012] For further improvement, a mounting groove is opened on the inner side of the retaining frame, and a self-lubricating wear-resistant pad is installed on the inner side of the mounting groove. The retaining frame contacts the ball through the self-lubricating wear-resistant pad, so that the service life of the spherical bearing is longer.

[0013] For further improvement, a connecting rod is fixedly connected to the lower end of the outer ring of the bearing.

[0014] As a further improvement, the outer ring of the dustproof ring is tilted to the right inner side, so that the dustproof ring can better fit the rocker arm.

[0015] As a further improvement, a circular end face is cut at the left end of the sphere, and the circular end face can increase the distance between the sphere and the inner wall of the bearing outer ring, making it more convenient to assemble the sphere.

[0016] As a further improvement, a groove is provided at the lower end of the outer ring of the bearing, making installation on the dustproof ring more convenient.

[0017] As a further improvement, both left and right ends of the retaining frame are chamfered, making the installation of the ball more convenient.

[0018] The beneficial effects of the utility model are as follows: the annular groove and the convex ring cooperate with each other to form a wavy fold, and the wavy fold makes it easier for the rocker arm to push the dustproof ring when the ball rotates back and forth, left and right, and the wavy fold makes the dustproof ring have a force to expand inward, so that the dustproof ring can always be close to the rocker arm, and the dustproof effect is good. An arc-shaped annular groove is provided at the connection between the rocker arm and the ball. Even if debris enters the dustproof ring, it can accumulate at the arc-shaped annular groove to avoid entering the matching surface of the inner ring and the retaining frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a cross-sectional view of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the dustproof ring of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the outer ring of the bearing of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the cage of the utility model;

[0024] Figure 6 It is a schematic diagram of the structure of the sphere of the utility model;

[0025] Figure 7 It is a structural schematic diagram of the sphere of the utility model.

[0026] Explanation of the reference numerals in the accompanying drawings: 1. outer ring of bearing; 11. internal thread; 12. mounting ring; 121. retaining groove; 13. groove; 2. retaining frame; 21. external thread; 22. mounting groove; 23. self-lubricating wear-resistant pad; 3. sphere; 31. rocker arm; 32. block; 33. screw rod; 331. through hole; 34. circular end face; 35. arcuate ring groove; 4. connecting rod; 5. dust ring; 51. retaining ring; 52. ring groove; 53. convex ring; 54. connecting ring. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings:

[0028] like Figure 1-Figure 7 As shown: In this embodiment, a dustproof rod end joint bearing comprises a bearing outer ring 1, a retainer 2 and a ball 3. The ball 3 is mounted on the inner side of the retainer 2. A circular end face 34 is cut on the left end of the ball 3. Chamfers are provided on both the left and right ends of the retainer 2. A mounting groove 22 is provided on the inner side of the retainer 2. A self-lubricating wear-resistant pad 23 is installed on the inner side of the mounting groove 22. The retainer 2 contacts the ball 3 through the self-lubricating wear-resistant pad 23. The retainer 2 is mounted on the inner side of the bearing outer ring 1. A connecting rod 4 is fixedly connected to the lower end of the bearing outer ring 1. An internal thread 11 is provided on the inner side of the bearing outer ring 1. An external thread 21 is provided on the outer side of the retainer 2. The internal thread 11 and the external thread 21 are matched and connected. A dustproof ring 5 is mounted on the bearing outer ring 1. The dustproof ring 5 is made of elastic material. The outer ring of the dustproof ring 5 is inclined to the right inner side. A mounting ring 12 is fixedly connected to the right end of the bearing outer ring 1. A slot 1 is provided on the outer side of the mounting ring 12. 21, a groove 13 is formed at the lower end of the outer ring 1 of the bearing, a connecting ring 54 is fixedly connected to the dust ring 5, a snap ring 51 is fixedly connected to the connecting ring 54, and the snap ring 51 is snapped into the inner side of the snap groove 121, and two annular grooves 52 are formed at the right end of the dust ring 5, and the annular grooves 52 and the inner hole of the dust ring 5 are concentric circles, and the distance between the end of the annular groove 52 close to the swing rod 31 and the end away from the swing rod 31 gradually increases from left to right, and the annular groove 52 at the left end of the dust ring 5 A convex ring 53 is fixedly connected at the corresponding position, and the convex ring 53 is adapted to the annular groove 52. The annular groove 52 and the convex ring 53 cooperate with each other to form a wavy fold. A swing rod 31 is fixedly connected to the right end of the sphere 3. An arcuate annular groove 35 is provided at the connection between the swing rod 31 and the sphere 3. The swing rod 31 passes through the dust ring 5. A stopper 32 is fixedly connected to the outside of the swing rod 31. A screw rod 33 is fixedly connected to the right end of the swing rod 31, and a through hole 331 is opened on the screw rod 33.

[0029] When the utility model is in use: the annular groove 52 and the convex ring 53 cooperate with each other to form a wavy fold. The wavy fold makes it easier for the rocker arm 31 to push the dustproof ring 5 when the ball 3 rotates forward, backward, left and right. The wavy fold makes the dustproof ring 5 have a force to approach one end of the rocker arm 31, so that the dustproof ring 5 can always be close to the rocker arm 31, and the dustproof effect is good.

[0030] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A dustproof rod end spherical bearing, comprising a bearing outer ring (1), a retaining frame (2) and a ball (3), wherein the ball (3) is mounted on the inner side of the retaining frame (2), and the retaining frame (2) is mounted on the inner side of the bearing outer ring (1), wherein: The outer ring (1) of the bearing is provided with a dustproof ring (5), which is made of an elastic material. The right end of the outer ring (1) of the bearing is fixedly connected with a mounting ring (12), and a groove (121) is formed on the outer side of the mounting ring (12). The dustproof ring (5) is fixedly connected with a connecting ring (54), and a snap ring (51) is fixedly connected with the connecting ring (54). The snap ring (51) is snapped on the inner side of the groove (121). The right end of the sphere (3) is fixedly connected with a swing rod (31). ), the swing rod (31) passes through the dust ring (5), the right end of the dust ring (5) is provided with two annular grooves (52), the annular grooves (52) and the inner hole of the dust ring (5) are concentric circles, the distance between the two ends of the annular groove (52) gradually increases from left to right, a convex ring (53) is fixedly connected to the corresponding position of the annular groove (52) at the left end of the dust ring (5), the convex ring (53) is adapted to the annular groove (52), and the annular groove (52) and the convex ring (53) cooperate with each other to form a wave-shaped fold.

2. The dustproof rod end joint bearing according to claim 1 is characterized in that: An arc-shaped annular groove (35) is provided at the connection between the swing rod (31) and the spherical body (3).

3. The dustproof rod end joint bearing according to claim 1 is characterized in that: The inner side of the bearing outer ring (1) is provided with an internal thread (11), and the outer side of the retaining frame (2) is provided with an external thread (21), and the internal thread (11) and the external thread (21) are matched and connected.

4. The dustproof rod end joint bearing according to claim 1 is characterized in that: The right end of the swing rod (31) is fixedly connected with a screw rod (33), and the outer side of the swing rod (31) is fixedly connected with a stopper (32).

5. The dustproof rod end joint bearing according to claim 4 is characterized in that: The screw rod (33) is provided with a through hole (331), and the lower end of the bearing outer ring (1) is fixedly connected with a connecting rod (4).

6. The dustproof rod end joint bearing according to claim 1 is characterized in that: The inner side of the retaining frame (2) is provided with a mounting groove (22), the inner side of the mounting groove (22) is provided with a self-lubricating wear-resistant pad (23), and the retaining frame (2) is in contact with the ball (3) via the self-lubricating wear-resistant pad (23).

7. The dustproof rod end joint bearing according to claim 1 is characterized in that: The outer ring of the dustproof ring (5) is inclined toward the right inner side.

8. The dustproof rod end joint bearing according to claim 1 is characterized in that: The left end of the sphere (3) is cut to have a circular end surface (34).

9. The dustproof rod end joint bearing according to claim 1, characterized in that: The lower end of the bearing outer ring (1) is provided with a groove (13).

10. The dustproof rod end joint bearing according to claim 1, characterized in that: The left and right ends of the retaining frame (2) are both chamfered.

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