Plastic cage for needle roller bearing

Abstract

The application relates to the technical field of bearing tooling, in particular to a plastic retainer for a needle bearing, which comprises a movable support, a fixed mounting plate and a locking mounting plate. The movable support comprises a fixed arc-shaped rod and a movable arc-shaped rod which is inserted into the fixed arc-shaped rod. The fixed arc-shaped rod and the movable arc-shaped rod are arranged in a spaced mode to form a circular ring. Diameter adjusting grooves are formed at the two ends of the fixed arc-shaped rod. Through the arrangement of the fixed arc-shaped rod and the movable arc-shaped rod, the diameter of the retainer can be quickly adjusted by pressing or pulling the fixed arc-shaped rod and the movable arc-shaped rod. The retainer can also quickly return to the original state. The retainer does not need to be bent, so that the possibility of the retainer being broken or being damaged is reduced. Through the arrangement of the fixed mounting plate and the locking mounting plate, the fixed arc-shaped rod and the movable arc-shaped rod can be quickly fixed by rotating the locking mounting plate and making the locking mounting plate adhere to the fixed mounting plate. The locking can also be directly released after the cylindrical slide rod and the butt joint hole are butt jointed by the arrangement of the dial plate.

Description

Technical Field

[0001] This invention relates to the field of bearing tooling technology, specifically to a plastic cage for a needle roller bearing. Background Technology

[0002] Needle roller bearings are a special type of rolling bearing, with their core design featuring slender cylindrical needle rollers (typically ≤5mm in diameter and with a length-to-diameter ratio ≥2.5). They are suitable for applications where radial space is limited but high load-bearing capacity is required. Due to their compact design and high load-bearing characteristics, needle roller bearings have become an ideal choice for space-constrained mechanical systems. The cage (also known as the bearing retainer) is one of the core components of a rolling bearing, and its main functions are to separate the rolling elements, maintain their spacing, guide the motion trajectory, and reduce friction.

[0003] The announcement number CN216199823U discloses a rapid prototyping plastic cage for needle roller bearings. It addresses the problem that during assembly, because the outer diameter of the bearing inner ring flange is larger than the inner diameter of the cage, a portion of the cage must be disconnected to ensure proper installation on the bearing inner ring. However, disconnected cages are often difficult to reconnect tightly and securely, affecting bearing lifespan. The proposed solution includes a plastic cage body with multiple stops. The stops have a common needle roller window on adjacent sides. A first connector is connected to one side of the plastic cage body. During use, the cage can be first installed onto the bearing inner ring, and then the first connector and a second connector can be tightly connected.

[0004] However, when installing the aforementioned rapidly prototyping needle roller bearing plastic cage, it is necessary to pull the plastic cage body to open the plastic cage at a large angle in order to install the plastic cage on the inner ring of the bearing. But because it needs to open at a large angle, the plastic cage may be broken or damaged during installation. Summary of the Invention

[0005] The purpose of this invention is to provide a plastic cage for needle roller bearings to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A plastic cage for a needle roller bearing, comprising:

[0008] A movable support, comprising a fixed arc rod and a movable arc rod inserted within the fixed arc rod, wherein the fixed arc rod and the movable arc rod are spaced apart to form a ring;

[0009] A fixed mounting plate is provided between the fixed arc rods and there are several fixed mounting plates at intervals. The fixed mounting plate is provided with a positioning component and a fixing component provided on the positioning component.

[0010] A locking mounting plate is disposed between two adjacent fixed mounting plates and connected to one of the fixed mounting plates. Pressing the fixed arc rod and the movable arc rod causes the movable arc rod to move relative to the fixed arc rod, changing the diameter of the annulus formed by the fixed arc rod and the movable arc rod. When the locking mounting plate rotates and is inserted into the positioning component on the adjacent fixed mounting plate, the fixed component is pushed into the locking mounting plate, fixing the position of the locking mounting plate, thereby fixing the fixed arc rod and the movable arc rod.

[0011] Preferably, the fixed arc rod has adjusting grooves at both ends, and the movable arc rod has limiting blocks at both ends. The limiting blocks at both ends of the movable arc rod are respectively inserted into the adjusting grooves of two adjacent fixed arc rods, and a return spring connected to the limiting block is provided in the adjusting groove.

[0012] Preferably, the fixed mounting plate has a rotating groove and a positioning groove at both ends, and the rotating groove and positioning groove of two adjacent fixed mounting plates are adjacent to each other.

[0013] Preferably, the positioning component includes a fixed block disposed in the positioning groove, a movable groove disposed in the fixed block, a connecting slider disposed in the movable groove, a square slide rod disposed on the connecting slider and extending through the wall of the movable groove into the movable groove, a cylindrical slide rod disposed on the square slide rod, a positioning spring disposed in the movable groove and connected to the connecting slider, a release groove disposed on the side wall of the movable groove, a lever disposed on the connecting slider and extending into the release groove, and a limiting groove disposed on the fixed block.

[0014] Preferably, the locking mounting plate is provided with a rotating base block and a connecting base block, a rotating rod is provided in the rotating groove, and the rotating base block is sleeved on the rotating rod.

[0015] Preferably, the connecting base block is provided with a pointed sliding surface, the lower part of the pointed sliding surface is provided with a mating hole, the connecting base block is provided with a fixed connecting block, the fixed connecting block is provided with a fixing groove, the top of the fixing groove is provided with a through groove, and the connecting base block is also provided with a limit rod.

[0016] Preferably, the locking mounting plate rotates along the rotating rod, and when the pointed sliding surface contacts the cylindrical slide rod, it pushes the cylindrical slide rod into the moving groove until the limiting rod contacts the wall of the limiting groove, the docking hole aligns with the cylindrical slide rod, and the cylindrical slide rod is inserted into the docking hole. Then, the lever is pulled to move the cylindrical slide rod out of the docking hole.

[0017] Preferably, the fixing component includes a mounting block disposed on the fixing block, a fixing rod inserted into the mounting block, a connecting rod disposed on the fixing rod, and a push rod.

[0018] Preferably, after the cylindrical slide bar is inserted into the mating hole, the push rod is pushed to insert the fixing rod into the fixing groove, and the through groove is used to allow the connecting rod to pass through.

[0019] Preferably, both the fixed mounting plate and the locking mounting plate are provided with needle roller grooves, which are used to install needle rollers.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] This invention utilizes a fixed and movable arc rod. By pressing or pulling the fixed and movable arc rods, the diameter of the retainer can be quickly adjusted, and the retainer can quickly return to its original shape without bending it, reducing the possibility of the retainer being broken or suffering hidden damage. With the fixed and locking mounting plates, simply rotating the locking mounting plate to align it with the fixed mounting plate allows for quick and easy fixing of the fixed and movable arc rods without the need for alignment or pre-aiming. Furthermore, the use of a lever plate allows for quick and direct unlocking if the cylindrical slide rod is accidentally aligned with the mating hole; simply moving the lever plate will unlock the connection. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the movable support of the present invention;

[0024] Figure 3 This is a cross-sectional view of the movable support structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the fixed mounting plate and the locking mounting plate of the present invention;

[0026] Figure 5 This is a schematic diagram showing the connection relationship between the fixed mounting plate and the locking mounting plate of the present invention;

[0027] Figure 6 This is a structural schematic diagram of the locking mounting plate, positioning component, and fixing component of the present invention;

[0028] Figure 7 This is a bottom view of the locking mounting plate, positioning assembly, and fixing assembly of the present invention.

[0029] Figure 8 This is a schematic diagram of the positioning component and fixing component of the present invention;

[0030] Figure 9 This is a cross-sectional view of the positioning component of the present invention;

[0031] Figure 10 This is a schematic diagram of the locking mounting plate of the present invention.

[0032] In the diagram: 1. Fixed arc rod; 2. Movable arc rod; 3. Fixed mounting plate; 4. Locking mounting plate; 5. Adjusting groove; 6. Limiting block; 7. Return spring; 8. Rotating groove; 9. Positioning groove; 10. Fixed block; 11. Moving groove; 12. Connecting slider; 13. Square slide rod; 14. Cylindrical slide rod; 15. Positioning spring; 16. Release groove; 17. Paddle plate; 18. Limiting groove; 19. Rotating base block; 20. Connecting base block; 21. Rotating rod; 22. Pointed sliding surface; 23. Butt hole; 24. Fixed connecting block; 25. Fixed groove; 26. Through groove; 27. Limiting rod; 28. Mounting block; 29. ​​Fixed rod; 30. Connecting rod; 31. Push rod; 32. Needle roller groove. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1 to 10 The present invention provides a technical solution:

[0035] A plastic cage for a needle roller bearing, comprising:

[0036] The movable support includes a fixed arc rod 1 and a movable arc rod 2, which are arranged in a ring at intervals. The fixed arc rod 1 has adjustment grooves 5 at both ends, and the movable arc rod 2 has limit blocks 6 at both ends. The limit blocks 6 are fixedly connected to the movable arc rod 2 by means of integral molding or other methods. The limit blocks 6 at both ends of the movable arc rod 2 are respectively inserted into the adjustment grooves 5 of two adjacent fixed arc rods 1. The adjustment groove 5 is provided with a return spring 7 connected to the limit block 6. One end of the return spring 7 is fixedly connected to the limit block 6 by adhesive or embedding, and the other end of the return spring 7 is fixedly connected to the inner wall of the adjustment groove 5 by adhesive or embedding.

[0037] Fixed mounting plate 3 is arranged between fixed arc rods 1 and is spaced out in several places. Fixed mounting plate 3 is provided with positioning component and fixed component provided on positioning component. Rotation groove 8 and positioning groove 9 are respectively provided at both ends of fixed mounting plate 3. The rotation groove 8 and positioning groove 9 of two adjacent fixed mounting plates 3 are adjacent.

[0038] The positioning assembly includes a fixed block 10, a movable groove 11, a connecting slider 12, a square slide rod 13, a cylindrical slide rod 14, a positioning spring 15, a release groove 16, a lever 17, and a limiting groove 18. The fixed block 10 is disposed within the positioning groove 9 and is fixedly connected to the side wall of the positioning groove 9 by means of adhesive bonding or integral molding. The movable groove 11 is formed within the fixed block 10, and the connecting slider 12 is disposed within the movable groove 11 and is movably connected to the movable groove 11. The square slide rod 13 is disposed on the connecting slider 12 and extends through the wall of the movable groove 11, and is movably connected to a square hole formed on the side wall of the movable groove 11. The square slide rod 13 is fixedly connected to the connecting slider 12 by means of integral molding. Next, a cylindrical slide bar 14 is mounted on a square slide bar 13. The cylindrical slide bar 14 is fixedly connected to the square slide bar 13 by means of integral molding or other methods. A positioning spring 15 is mounted in the moving groove 11 and connected to the connecting slider 12. One end of the positioning spring 15 is fixedly connected to the connecting slider 12 by adhesive or embedding. The other end of the positioning spring 15 is fixedly connected to the inner wall of the moving groove 11 by adhesive or embedding. A release groove 16 is opened on the side wall of the moving groove 11. A lever 17 is mounted on the connecting slider 12 and extends into the release groove 16. The lever 17 is fixedly connected to the connecting slider 12 by means of integral molding or other methods. The lever 17 is movably connected to the release groove 16. A limiting groove 18 is opened on the fixing block 10.

[0039] A locking mounting plate 4 is disposed between two adjacent fixed mounting plates 3 and connected to one of the fixed mounting plates 3. The locking mounting plate 4 is provided with a rotating base block 19 and a connecting base block 20. The rotating base block 19 is fixedly connected to the locking mounting plate 4 by means of integral molding or the like. The connecting base block 20 is disposed at the other end of the locking mounting plate 4 and is fixedly connected to the locking mounting plate 4 by means of integral molding or the like. A rotating rod 21 is provided in the rotating groove 8. The rotating rod 21 is fixedly connected to the inner wall of the fixed groove 25 by means of adhesive or the like. The rotating base block 19 is sleeved on the rotating rod 21 and the rotating base block 19 and the rotating rod 21 are rotatably connected.

[0040] A pointed sliding surface 22 is provided on the connecting base block 20, and a docking hole 23 is provided at the lower part of the pointed sliding surface 22. A fixed connecting block 24 is provided on the connecting base block 20. The fixed connecting block 24 is fixedly connected to the connecting base block 20 by means of integral molding or the like. A fixed groove 25 is provided on the fixed connecting block 24, and a through groove 26 is provided at the top of the fixed groove 25. The width of the through groove 26 is smaller than the width of the fixed groove 25. A limit rod 27 is also provided on the connecting base block 20. The connecting base block 20 is fixedly connected to the limit rod 27 by means of integral molding or the like. When the locking mounting plate 4 rotates along the rotating rod 21, the pointed sliding surface 22 contacts the cylindrical sliding rod 14, pushing the cylindrical sliding rod 14 into the moving groove 11 until the limit rod 27 contacts the wall of the limit groove 18. The docking hole 23 is aligned with the cylindrical sliding rod 14, so that the cylindrical sliding rod 14 is inserted into the docking hole 23. The lever plate 17 is pulled to move the cylindrical sliding rod 14 out of the docking hole 23.

[0041] The fixing component includes a mounting block 28, a fixing rod 29, a connecting rod 30, and a push rod 31. The mounting block 28 is mounted on the fixing block 10 and is fixedly connected to the fixing block 10 via integral molding or other methods. The fixing rod 29 is inserted into the mounting block 28 and is movably connected to it. The connecting rod 30 is mounted on the fixing rod 29 and is fixedly connected to the fixing rod 29 via integral molding or other methods. Both ends of the connecting rod 30 are equipped with fixing rods 29. The fixing component can simultaneously fix multiple fixing connecting blocks 24. The push rod 31 is mounted on the connecting rod 30 on the fixing rod 29 and is fixedly connected to the fixing rod 29 via integral molding or other methods. 1. After bending, it extends into the gap between the locking mounting plate 4 and the positioning groove 9, making it easy for the user to move the fixing rod 29. The front end of the fixing rod 29 is slightly smaller than the size of the fixing groove 25, and the rear end of the fixing rod 29 is slightly larger than the size of the fixing groove 25, making it easy to snap the fixing rod 29 into the fixing groove 25. After the cylindrical slide rod 14 is inserted into the docking hole 23, the push rod 31 is pushed to insert the fixing rod 29 into the fixing groove 25. The through groove 26 is used to allow the connecting rod 30 to pass through. When it is necessary to install the cage on the bearing with the inner ring having a retaining edge, it is only necessary to adjust the opening of the rotating groove 8 and the positioning groove 9 to face the outer surface of the cage, and make adaptive adjustments to the pointed sliding surface 22 and the push rod 31.

[0042] Both the fixed mounting plate 3 and the locking mounting plate 4 are provided with needle roller grooves 32. The needle roller grooves 32 are used to install needle rollers, so that the needle rollers are rotatably connected to the needle roller grooves 32.

[0043] Working principle: In use, press the fixed arc rod 1 and the movable arc rod 2 to move the movable arc rod 2 relative to the fixed arc rod 1, changing the diameter of the annulus formed by the fixed arc rod 1 and the movable arc rod 2, so that the cage can be inserted into the outer ring of the bearing. The return spring 7 makes the fixed arc rod 1 and the movable arc rod 2 quickly fit into the outer ring of the bearing. The locking mounting plate 4 rotates along the rotating rod 21, so that when the pointed sliding surface 22 contacts the cylindrical slide rod 14, it pushes the cylindrical slide rod 14 into the moving groove 11 until the limiting rod 27 contacts the wall of the limiting groove 18. The mating hole 23 is aligned with the cylindrical slide rod 14, so that the cylindrical slide rod 14 is inserted into the mating hole 23. Push the push rod 31 to insert the fixed rod 29 into the fixed groove 25.

[0044] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic cage for a needle roller bearing, characterized in that, include: A movable support, comprising a fixed arc rod and a movable arc rod inserted within the fixed arc rod, wherein the fixed arc rod and the movable arc rod are spaced apart to form a ring; A fixed mounting plate is provided between the fixed arc rods and there are several fixed mounting plates at intervals. The fixed mounting plate is provided with a positioning component and a fixing component provided on the positioning component. A locking mounting plate is disposed between two adjacent fixed mounting plates and connected to one of the fixed mounting plates. Pressing the fixed arc rod and the movable arc rod causes the movable arc rod to move relative to the fixed arc rod, changing the diameter of the annulus formed by the fixed arc rod and the movable arc rod. When the locking mounting plate rotates and is inserted into the positioning component on the adjacent fixed mounting plate, the fixed component is pushed into the locking mounting plate, fixing the position of the locking mounting plate, thereby fixing the fixed arc rod and the movable arc rod.

2. The plastic cage for a needle roller bearing according to claim 1, characterized in that: The fixed arc rod has adjustment grooves at both ends, and the movable arc rod has limit blocks at both ends. The limit blocks at both ends of the movable arc rod are respectively inserted into the adjustment grooves of two adjacent fixed arc rods, and a return spring connected to the limit block is provided in the adjustment groove.

3. A plastic retainer for a needle roller bearing according to claim 2, characterized in that: The fixed mounting plate has a rotating groove and a positioning groove at both ends, and the rotating groove and positioning groove of two adjacent fixed mounting plates are adjacent to each other.

4. A plastic retainer for a needle roller bearing according to claim 3, characterized in that: The positioning component includes a fixed block disposed in the positioning groove, a movable groove disposed in the fixed block, a connecting slider disposed in the movable groove, a square slide rod disposed on the connecting slider and extending through the wall of the movable groove into the movable groove, a cylindrical slide rod disposed on the square slide rod, a positioning spring disposed in the movable groove and connected to the connecting slider, a release groove disposed on the side wall of the movable groove, a lever disposed on the connecting slider and extending into the release groove, and a limiting groove disposed on the fixed block.

5. A plastic retainer for a needle roller bearing according to claim 4, characterized in that: The locking mounting plate is provided with a rotating base block and a connecting base block, and a rotating rod is provided in the rotating groove. The rotating base block is sleeved on the rotating rod.

6. A plastic retainer for a needle roller bearing according to claim 5, characterized in that: The connecting base block is provided with a pointed sliding surface, and a mating hole is provided at the lower part of the pointed sliding surface. The connecting base block is provided with a fixed connecting block, and a fixed groove is provided on the fixed connecting block. A through groove is provided at the top of the fixed groove. The connecting base block is also provided with a limit rod.

7. A plastic retainer for a needle roller bearing according to claim 6, characterized in that: The locking mounting plate rotates along the rotating rod, causing the pointed sliding surface to contact the cylindrical sliding rod, pushing the cylindrical sliding rod into the moving groove until the limiting rod contacts the wall of the limiting groove, the docking hole aligns with the cylindrical sliding rod, causing the cylindrical sliding rod to be inserted into the docking hole, and the lever is pulled to move the cylindrical sliding rod out of the docking hole.

8. A plastic retainer for a needle roller bearing according to claim 7, characterized in that: The fixing component includes a mounting block disposed on the fixing block, a fixing rod inserted into the mounting block, a connecting rod disposed on the fixing rod, and a push rod.

9. A plastic retainer for a needle roller bearing according to claim 8, characterized in that: After the cylindrical slide bar is inserted into the docking hole, the push rod is pushed to insert the fixing rod into the fixing groove, and the through groove is used to allow the connecting rod to pass through.

10. A plastic retainer for a needle roller bearing according to claim 1, characterized in that: Both the fixed mounting plate and the locking mounting plate are provided with needle roller grooves, which are used to install needle rollers.

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