A ball cage protection device

Abstract

This utility model provides a ball cage protection device, relating to the field of ball cage technology, including a protective cover. The protective cover includes a first cover body and a second cover body. A second sealing strip is sealed and inserted into the first sealing strip. Both ends of the first cover body and the second cover body are provided with movable threaded sleeves. A sealing ring is provided on one side of the movable threaded sleeve. The sealing ring is sealed and connected to the ends of the first sealing strip and the second sealing strip. This utility model, through a splicing cover design, allows for assembly or maintenance without disassembling the ball cage or half shaft, greatly improving the convenience of disassembly and assembly. Through the synergistic structure of "radial insertion sealing, end elastic sealing, and internal tightening threaded sleeve support", during vehicle turning and bumpy processes, the spring compensates for displacement to ensure sealing pressure, and the tightening threaded sleeve prevents the cover body from deforming. The double seal blocks the intrusion of impurities and the leakage of lubricating grease, achieving comprehensive protection for the ball cage.

Description

Technical Field

[0001] This utility model relates to the field of ball cage technology, and more specifically, to a ball cage protection device. Background Technology

[0002] The CV joint, also known as a constant velocity joint, is a core component in a car's transmission system that connects the gearbox / transfer case to the drive wheels. When a vehicle is in motion, the drive wheels will change angles due to steering (left and right rotation) and suspension (up and down movement). The core function of the CV joint is to transmit the engine's power to the drive wheels at a constant speed and smoothly under these angle changes, avoiding power interruption or fluctuation.

[0003] The ball cage protection device is a "barrier component" specifically designed to protect the ball cage. Its core function is to prevent external impurities from entering the ball cage and to keep the lubricating grease inside the ball cage sealed, so as to prevent the ball cage from failing due to "lack of oil" or "wear from impurities". Currently, the mainstream ball cage protection device is based on dust cover plus clamp.

[0004] As disclosed in the prior art, patent CN217873857U discloses a protective device for automotive CV joints, comprising: a CV joint, with a dust cover on the outside of the CV joint and a fixing ring at the outer end of the dust cover; a positioning groove located inside the CV joint, each positioning groove having an extrusion plate inside, a slot at the inner end of the extrusion plate, and a rotating plate fixedly connected to the outer end of the extrusion plate; a rotating ring located outside the CV joint, with an extrusion groove at the inner end of the rotating ring; and a movable groove located inside the CV joint, with a spring inside the movable groove. The beneficial effects are: this utility model, through the extrusion plate and fixing ring in the proposed automotive CV joint protective device, can fix the dust cover to the outside of the CV joint, preventing the dust cover from falling off after installation. Simultaneously, the extrusion plate presses the fixing ring inward, ensuring a tight fit between the fixing ring and the CV joint, thus improving the sealing effect.

[0005] The existing integrated dust cover has significant technical problems with its inconvenience in disassembly and assembly: during assembly, the dust cover must first be placed on one end of the half shaft, then the half shaft and the CV joint must be splined and fixed, and finally the clamps at both ends must be tightened with special tools. When the dust cover is damaged and needs to be replaced, the connecting bolts between the half shaft and the CV joint must be disassembled in reverse, the half shaft and the CV joint must be separated, and the old dust cover can be removed and the new dust cover installed. The whole process involves the disassembly and assembly of multiple components of the transmission system, and the operation steps are cumbersome. This not only increases the labor intensity of maintenance personnel, but also prolongs the vehicle maintenance time, resulting in low efficiency. Utility Model Content

[0006] The main objective of this invention is to provide a ball cage protection device that can effectively solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A ball cage protection device includes a protective cover, the protective cover comprising a first cover body and a second cover body, a first sealing strip and a second sealing strip respectively provided on the side of the first cover body and the second cover body that are close to each other, the second sealing strip being sealed and inserted into the first sealing strip, and movable threaded sleeves provided at both ends of the first cover body and the second cover body, the movable threaded sleeves being threaded onto fixed threaded sleeves, and a sealing ring provided on one side of the movable threaded sleeve, the sealing ring being sealed and connected to the ends of the first sealing strip and the second sealing strip.

[0009] Preferably, the fixing screw sleeve is fixedly sleeved on the ball cage.

[0010] Preferably, a movable ring is rotatably fitted onto the movable screw sleeve, and the movable ring has several through holes around its circumference.

[0011] Preferably, a guide rod is slidably inserted into the through hole, and one end of the guide rod is fixedly connected to one side of the tensioning screw sleeve.

[0012] Preferably, the side of the tensioning screw sleeve away from the guide rod is provided with several adjusting grooves at equal intervals, and the outer peripheral surface of the tensioning screw sleeve abuts against the inner wall of the first cover and the second cover.

[0013] Preferably, the movable threaded sleeve is provided with threads on both the inside and outside, and the movable threaded sleeve is connected to the internal thread of the tightening threaded sleeve.

[0014] Preferably, a spring is fixedly connected to one side of the movable ring, and the end of the spring away from the movable ring is fixedly connected to the sealing ring.

[0015] Preferably, the sealing ring is slidably sleeved on the first cover and the second cover, and abuts against the ends of the first sealing strip and the second sealing strip.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) This application uses a splicing cover design, which can complete the assembly or maintenance without disassembling the ball cage or half shaft, greatly improving the convenience of disassembly and assembly.

[0018] (2) This application uses the first sealing strip and the second sealing strip to be nested and inserted, and the ends are sealed by springs and sealing rings to form a collaborative structure of "radial insertion sealing, end elastic sealing, and internal support screw sleeve". During vehicle turning and bumping, the spring compensates for displacement to ensure sealing pressure, and the support screw sleeve prevents the cover from deforming. The double seal blocks the intrusion of impurities and the leakage of lubricating grease, thus achieving comprehensive protection of the ball cage. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the front view structure of this utility model;

[0021] Figure 3 This utility model Figure 2 3D schematic diagram of the cross-sectional structure of the middle AA section;

[0022] Figure 4 This utility model Figure 3 Enlarged view of the structure at point B in the middle;

[0023] Figure 5 This is a three-dimensional schematic diagram of a partial cross-sectional structure of the first and second covers in this utility model;

[0024] Figure 6 This is an exploded view of the structure of this utility model.

[0025] In the diagram: 1. Protective cover; 11. First cover body; 12. Second cover body; 13. First sealing strip; 14. Second sealing strip; 2. Movable threaded sleeve; 21. Movable ring; 22. Spring; 23. Tightening threaded sleeve; 24. Adjusting groove; 25. Guide rod; 26. Through hole; 3. Fixed threaded sleeve; 4. Sealing ring. Detailed Implementation

[0026] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0027] like Figures 1-3 , Figure 5 As shown in the figure, this utility model embodiment proposes a ball cage protection device, including a protective cover 1. The protective cover 1 includes a first cover body 11 and a second cover body 12. A first sealing strip 13 and a second sealing strip 14 are respectively provided on the side of the first cover body 11 and the second cover body 12 that are close to each other. The second sealing strip 14 is sealed and inserted into the first sealing strip 13. Both ends of the first cover body 11 and the second cover body 12 are provided with movable screw sleeves 2. The movable screw sleeves 2 are threaded onto the fixed screw sleeves 3. A sealing ring 4 is provided on one side of the movable screw sleeve 2. The sealing ring 4 is sealed and connected to the ends of the first sealing strip 13 and the second sealing strip 14. The fixed screw sleeve 3 is fixedly sleeved on the ball cage.

[0028] When assembling the protective cover 1, the first cover body 11 and the second cover body 12 are joined together along the outer periphery of the ball cage, so that the second sealing strip 14 is precisely inserted into the first sealing strip 13. Through the nested insertion structure of the first sealing strip 13 and the second sealing strip 14, a radial sealing interface of the main body of the protective cover 1 is formed. This insertion structure can prevent external dust, mud, rainwater and other impurities from entering the interior of the protective cover 1 from the gap between the first cover body 11 and the second cover body 12. At the same time, it prevents the ball cage-specific lubricating grease inside the protective cover 1 from leaking from the splicing point, thus providing basic sealing protection for the ball cage.

[0029] Compared to the existing integrated protective cover 1, the spliced ​​cover design can be assembled or maintained without disassembling the ball cage or half shaft, greatly improving the convenience of disassembly and assembly.

[0030] The fixing sleeve 3 is pre-fitted onto the outer circumference of the ball cage shell by interference fit or welding, so that the fixing sleeve 3 does not need to be removed when replacing or maintaining the protective cover 1.

[0031] like Figure 1 , Figure 3 , Figure 4 , Figure 6 As shown, a movable ring 21 is rotatably sleeved on the movable sleeve 2. Several through holes 26 are provided on the circumference of the movable ring 21. A guide rod 25 is slidably inserted into the through holes 26. One end of the guide rod 25 is fixedly connected to one side of the tensioning sleeve 23. Several adjusting grooves 24 are provided at equal intervals on the side of the tensioning sleeve 23 away from the guide rod 25. The outer circumferential surface of the tensioning sleeve 23 abuts against the inner wall of the first cover 11 and the second cover 12. The movable sleeve 2 is threaded both inside and outside. The movable sleeve 2 is threadedly connected to the inside of the tensioning sleeve 23. A spring 22 is fixedly connected to one side of the movable ring 21. The end of the spring 22 away from the movable ring 21 is fixedly connected to the sealing ring 4. The sealing ring 4 is slidably sleeved outside the first cover 11 and the second cover 12 and abuts against the ends of the first sealing strip 13 and the second sealing strip 14.

[0032] After the first cover 11 and the second cover 12 are assembled, the movable sleeve 2 is rotated. Through the threaded engagement between the movable sleeve 2 and the fixed sleeve 3, the movable sleeve 2 moves towards the protective cover 1. Since one end of the movable sleeve 2 is threaded into the tightening sleeve 23, and one end of the tightening sleeve 23 is inserted into the movable ring 21 through the guide rod 25, the movable ring 21 is fixed when the movable sleeve 2 is rotated, thereby preventing the tightening sleeve 23 from rotating synchronously with the movable sleeve 2, thus tightening the cover. The taper of the end of the threaded sleeve 23 near the protective cover 1 gradually decreases. As the end of the movable threaded sleeve 2 gradually penetrates into the tightening threaded sleeve 23, the end of the tightening threaded sleeve 23 near the protective cover 1 is gradually pushed outward, thereby tightening the ends of the first cover 11 and the second cover 12 from the inside. Since the sealing ring 4 is sleeved on the outer circumferential surface of the ends of the first cover 11 and the second cover 12, the ends of the first cover 11 and the second cover 12 are sealed and fixed under the internal and external action of the tightening threaded sleeve 23 and the sealing ring 4.

[0033] Through the above technical solution, the sealing and fixing of the ends of the first cover 11, the second cover 12, the first sealing strip 13 and the second sealing strip 14 are achieved, forming a collaborative structure of "radial sealing strip insertion sealing, end sealing ring 4 elastic sealing, and internal tightening sleeve 23 support". During vehicle turning and bumping, the spring 22 compensates for displacement to ensure sealing pressure, and the tightening sleeve 23 prevents the cover from deforming. The double seal blocks the intrusion of impurities and the leakage of lubricating grease, achieving comprehensive protection for the ball cage.

[0034] The working principle of this ball cage protection device:

[0035] The first cover 11 and the second cover 12 are aligned along the outer periphery of the ball cage, so that the second sealing strip 14 is inserted into the first sealing strip 13, forming a radial seal on the main body of the protective cover 1. The movable ring 21 is fixed, and the movable screw sleeve 2 is rotated. Through the threaded engagement between the movable screw sleeve 2 and the fixed screw sleeve 3, the movable screw sleeve 2 moves towards the protective cover 1. As one end of the movable screw sleeve 2 gradually penetrates into the tightening screw sleeve 23, the end of the tightening screw sleeve 23 near the protective cover 1 is gradually pushed outward, thereby sealing the first cover 1 from the inside. The ends of the first cover 11 and the second cover 12 are tightened. Since the sealing ring 4 is sleeved on the outer circumferential surface of the ends of the first cover 11 and the second cover 12, the ends of the first cover 11 and the second cover 12 are sealed and fixed under the action of the tightening screw sleeve 23 and the sealing ring 4. This prevents external dust, mud, rainwater and other impurities from entering the interior of the protective cover 1 through the gap between the first cover 11 and the second cover 12. At the same time, it prevents the special lubricating grease for the ball cage in the protective cover 1 from leaking from the joint, thus providing comprehensive sealing protection for the ball cage.

[0036] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A ball cage guard comprising a guard shield (1), characterised in that: The protective cover (1) includes a first cover body (11) and a second cover body (12). A first sealing strip (13) and a second sealing strip (14) are respectively provided on the side of the first cover body (11) and the second cover body (12) that are close to each other. The second sealing strip (14) is sealed and inserted into the first sealing strip (13). Both ends of the first cover body (11) and the second cover body (12) are provided with movable threaded sleeves (2). The movable threaded sleeves (2) are threaded on the fixed threaded sleeves (3). A sealing ring (4) is provided on one side of the movable threaded sleeves (2). The sealing ring (4) is sealed and connected to the ends of the first sealing strip (13) and the second sealing strip (14).

2. A ball cage guard according to claim 1, wherein: The fixing sleeve (3) is fixedly fitted onto the ball cage.

3. A ball cage guard according to claim 1, wherein: The movable threaded sleeve (2) is rotatably fitted with a movable ring (21), and the movable ring (21) has several through holes (26) around its circumference.

4. A ball cage guard according to claim 3, wherein: A guide rod (25) is slidably inserted into the through hole (26), and one end of the guide rod (25) is fixedly connected to one side of the tensioning screw sleeve (23).

5. A ball cage guard according to claim 4, wherein: The tensioning sleeve (23) has several adjusting grooves (24) equidistantly arranged on the side away from the guide rod (25), and the outer peripheral surface of the tensioning sleeve (23) abuts against the inner wall of the first cover (11) and the second cover (12).

6. A ball cage guard according to claim 5, wherein: The movable screw sleeve (2) is threaded both inside and outside, and the movable screw sleeve (2) is threadedly connected to the internal thread of the tightening screw sleeve (23).

7. A ball cage guard according to claim 3, wherein: A spring (22) is fixedly connected to one side of the movable ring (21), and the end of the spring (22) away from the movable ring (21) is fixedly connected to the sealing ring (4).

8. A ball cage guard according to claim 1, wherein: The sealing ring (4) is slidably sleeved outside the first cover (11) and the second cover (12), and abuts against the ends of the first sealing strip (13) and the second sealing strip (14).

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