A high-precision boring machining automobile inner ball cage

Abstract

The application discloses a high-precision boring machining automobile inner ball cage and relates to the technical field of automobile parts.The automobile inner ball cage comprises a ball cage main body, a connecting rod and a dustproof sleeve, the ball cage main body is provided with the connecting rod, the outer wall of the connecting rod is fixedly provided with the dustproof sleeve, the dustproof sleeve is fixedly installed on the outer wall of the ball cage main body through a clamp, the outer wall of the dustproof sleeve is fixedly connected with a positioning ring, and the outer wall of the positioning ring is fixedly provided with a ring-shaped cover body.The ball cage is provided with the ring-shaped cover body, the positioning ring and an easy-to-tear ring, the clamp is wrapped and protected, the clamp is prevented from being corroded in a harsh environment, the service life and locking reliability of the clamp are improved, foreign matters such as grass, cables and plastic bags are prevented from being easily clamped into or wound around the clamp gap in off-road or complex road conditions, the adaptability of the ball cage assembly to harsh working conditions such as saline-alkali, dust and many foreign matters is improved, and the maintenance convenience is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, specifically to a high-precision boring process for an automotive inner CV joint. Background Technology

[0002] Automotive CV joints typically use rubber dust covers in conjunction with metal clamps for sealing and protection. The metal clamps apply uniform tightening force to ensure a tight seal between the dust cover and the CV joint housing and the outer surface of the drive shaft, eliminating gaps and enhancing the sealing effect. When gravel or foreign objects splashed from the chassis directly impact the clamps, they can easily deform or scratch the clamps, causing the dust cover seal to fail.

[0003] In off-road or complex road conditions, foreign objects such as weeds and plastic bags can easily get stuck or entangled in the gaps of the clamps. When the drive shaft rotates at high speed, it will cause the entangled foreign objects to continuously pull on the clamps, resulting in an imbalance of the clamp's tightening torque, local loosening or even displacement. This causes the sealing gap at both ends of the dust cover to widen, allowing external impurities such as mud, sand, and moisture to enter the ball cage, contaminate the lubricating grease, and accelerate the wear of the internal steel balls and raceways. In severe cases, it can cause abnormal noise and jamming in the inner ball cage, reducing its transmission accuracy and service life.

[0004] Patent CN118959460B discloses a ball cage universal joint with a dust cover. The above patent realizes constant velocity transmission in multiple directions, adapts to the overall structure under adverse driving conditions, avoids pulling on the dust cover body, and avoids twisting deformation and fatigue damage to the dust cover body.

[0005] The aforementioned patent includes a ball-cage universal joint body and a dust cover assembly, which solves the problem that the dust cover is fixed at both ends to the drive shaft and the driven shaft respectively, which makes it easy to pull on the dust cover under poor driving conditions, resulting in the dust cover being twisted, deformed and fatigued. However, there is still room for improvement in the clamp protection. This application realizes the wrap-around protection of the clamp, which solves the problem that foreign objects such as weeds, cables, and plastic bags are easy to get stuck or entangled in the clamp gaps under off-road or complex road conditions.

[0006] Therefore, this application proposes a high-precision boring process for an automotive inner CV joint that provides enveloping protection for the clamp. Summary of the Invention

[0007] The purpose of this invention is to provide a high-precision boring-machined automotive inner CV joint to solve the technical problem mentioned in the background art, in which foreign objects such as weeds, cables, and plastic bags are easily stuck or entangled in the gaps of the clamp under off-road or complex road conditions.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a high-precision boring machined automotive inner CV joint, comprising a CV joint body, a connecting rod, and a dust cover. The CV joint body is provided with a connecting rod, and a dust cover is fixedly fitted onto the outer wall of the connecting rod. The dust cover is fixedly installed on the outer wall of the CV joint body by a clamp. A positioning ring is fixedly connected to the outer wall of the dust cover. An annular cover is fixedly fitted onto the outer wall of the positioning ring. A snap-fit ​​block is fixedly connected at equal intervals to the inner wall of the annular cover. A snap-fit ​​groove is equidistantly formed on the outer wall of the positioning ring, and the snap-fit ​​groove is fixedly fitted onto the outer wall of the snap-fit ​​block. An easy-tear ring is fixedly connected inside the positioning ring, and an easy-tear point is formed between the positioning ring and the easy-tear ring. A tear plate is fixedly connected to the outer wall of the easy-tear ring.

[0009] Preferably, circumferential plates are symmetrically arranged on the annular cover, and plug-in blocks are fixedly connected to the outer wall of the circumferential plates. A positioning ring is connected to the circumferential plate through the plug-in blocks. The side wall of the positioning ring has a plug hole, which is fixedly fitted onto the outer wall of the plug-in block. Ribs are fixedly connected at equal intervals to the outer wall of the circumferential plate, and the annular cover is slidably connected to the outer wall of the ribs. The ribs are arranged on the side of the circumferential plate away from the main body of the ball cage.

[0010] Preferably, a connecting ring is fixedly connected to the top of the outer wall of the annular cover, a rotating ring is rotatably connected to the top of the connecting ring, a rotating plate is fixedly connected to the top of the outer wall of the rotating ring, a buffer spring is fixedly connected to the top of the outer wall of the rotating plate, a protective plate is fixedly connected to the top of the outer wall of the buffer spring, the protective plate is movably fitted onto the outer wall of the rotating plate, and abutment plates are symmetrically fixedly connected to the bottom of the outer wall of the rotating plate.

[0011] Preferably, the inner wall of the annular cover is circumferentially provided with an impact block, the inner wall of the impact block is symmetrically fixedly connected with a buffer block, the inner wall of the impact block is fixedly connected with a limit spring, the limit spring is symmetrically arranged on both sides of the buffer block, the impact block is connected to an impact plate through the limit spring, the side wall of the impact plate is fixedly connected with a weight, the outer wall of the impact plate is symmetrically fixedly connected with a slider, the outer wall of the slider is slidably connected with a slide rail, the outer wall of the slide rail is fixedly connected with an impact block, the contact plate is symmetrically distributed on both sides of the connecting ring and the rotating ring, and the circumferential plate is symmetrically distributed on both sides of the connecting ring and the rotating ring.

[0012] Preferably, a sealing film is fixedly connected to the side of the positioning ring without an insertion hole, and the tear plate is attached to the sealing film.

[0013] Preferably, a limiting plate is fixedly connected to the side wall of the circumferential plate, and a locking plate is fixedly connected to the side wall of the snap-fit ​​block, with the locking plate in contact with the positioning ring.

[0014] Preferably, a sealing ring is fixedly connected to the side wall of the annular cover, a second spring is fixedly connected to the side wall of the sealing ring, and an inertial block is fixedly connected to the side wall of the second spring, with the inertial block located inside the annular cover.

[0015] Preferably, the outer wall of the inertial block is provided with an inclined block, the side wall of the inclined block is fixedly connected to a first spring, the side wall of the first spring is fixedly connected to an annular cover, and the inclined block and the first spring are symmetrically arranged on both sides of the inertial block.

[0016] Preferably, the outer wall of the inertial block is symmetrically provided with inclined grooves, the inertial block is continuously arranged on the side wall of the inclined groove, and the inclined groove is movably fitted on the outer wall of the inclined block.

[0017] Preferably, the rotating plate and the protective plate are movably fitted onto the outer wall of the dust cover, and the dust cover passes through the connecting ring and the rotating ring.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This invention, through the installation of annular cover, positioning ring, and easy-tear ring, achieves enveloping protection for the clamp, solving the problem of clamps being easily corroded in harsh environments. The annular cover and positioning ring form a physical protective layer, covering the clamp and isolating it from external corrosive media, improving the clamp's service life and locking reliability, preventing the clamp from rusting or breaking, thus preventing dust cover detachment and grease leakage. It also solves the problem that foreign objects such as weeds, cables, and plastic bags can easily get stuck or entangled in the clamp gaps in off-road or complex road conditions, improving the adaptability of the CV joint assembly in harsh working conditions such as saline-alkali, dusty, and foreign object-prone environments. Through the preset easy-tear point, the damage path is guided to the special easy-tear ring, achieving low-destructive forced disassembly and improving maintenance convenience.

[0020] 2. This invention achieves multi-layer locking by installing a circumferential plate, plug-in block, ribs, and other structures. After the annular cover and positioning ring are initially engaged by the plug-in block and slot, the plug-in block is inserted into the insertion hole of the positioning ring to form a second mechanical lock. This solves the problem that the protective components may loosen on their own under complex working conditions, ensuring their long-term stable connection and enhancing the firmness of the connection between the annular cover and the positioning ring. The support structure formed by the circumferential plate, annular cover, and ribs absorbs and buffers the impact force when subjected to side impacts, maintaining a safe gap between the annular cover and the clamp, thus improving impact resistance.

[0021] 3. This invention achieves dynamic clamping and locking through the installation of a buffer spring, protective plate, and abutment plate. The protective plate drives the rotating ring and abutment plate to rotate, while the abutment plate slides on the circumferential plate, continuously pressing down on the circumferential plate. After the plug-in block is initially inserted into the insertion hole, the circumferential plate is dynamically clamped a second time to ensure that the plug-in block is completely and firmly inserted into the insertion hole. The buffer spring located between the protective plate and the rotating plate forms a buffer. When splashes such as gravel and mud hit the protective plate, the impact force is absorbed and weakened by the buffer spring, achieving axial energy absorption and buffering, and solving the problem that the connection structure is prone to loosening under long-term vibration and impact due to incomplete locking.

[0022] 4. This invention, by installing a limiting spring, impact block, and weight, utilizes the inherent acceleration changes during vehicle movement. Under the action of the limiting spring, the weight repeatedly impacts the inner wall of the annular cover, causing mechanical vibration in the annular cover. In cold winters, the vibration generated by the impact of the weight interferes with ice crystal growth, preventing the formation of solid ice layers. This avoids damage to the annular cover and difficulty in disassembly due to freezing, improves the adaptability of the ball cage assembly in extreme environments, and solves the problem of the annular cover and positioning ring becoming stuck together due to ice and difficult to disassemble. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the front structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the connecting ring, rotating plate, and protective plate of the present invention;

[0025] Figure 3 This is a schematic diagram of the separated structure of the annular cover and positioning ring of the present invention;

[0026] Figure 4 This is a schematic diagram of the annular cover structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the positioning ring structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the rib structure of the present invention;

[0029] Figure 7 This is a schematic cross-sectional view of the annular cover of the present invention;

[0030] Figure 8 This is a schematic diagram of the internal structure of the annular cover of the present invention.

[0031] In the diagram: 1. Main body of the ball cage; 2. Connecting rod; 3. Dust cover; 4. Clamp; 5. Annular cover; 6. Positioning ring; 7. Snap-fit ​​block; 8. Locking plate; 9. Slot; 10. Circumferential plate; 11. Limiting plate; 12. Insertion block; 13. Easy-tear ring; 14. Insertion hole; 15. Tear plate; 16. Easy-tear point; 17. Impact block; 18. Buffer block; 19. Weight block; 20. Limiting spring; 21. Slide rail; 22. Impact plate; 23. Slider; 24. Rib; 25. Connecting ring; 26. Rotating ring; 27. Rotating plate; 28. Buffer spring; 29. ​​Protective plate; 30. Sealing membrane; 31. Contact plate; 32. Sealing ring; 33. First spring; 34. Inertia block; 35. Inclined groove; 36. Inclined block; 37. Second spring. Detailed Implementation

[0032] 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.

[0033] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Please see Figure 1 , Figure 3 and Figure 5 The present invention provides an embodiment of a high-precision boring process for an automotive inner CV joint, comprising a CV joint body 1, a connecting rod 2, and a dust cover 3. The connecting rod 2 is provided on the CV joint body 1, and the dust cover 3 is fixedly fitted on the outer wall of the connecting rod 2. The dust cover 3 is fixedly installed on the outer wall of the CV joint body 1 by a clamp 4. A positioning ring 6 is fixedly connected to the outer wall of the dust cover 3. An annular cover 5 is fixedly fitted on the outer wall of the positioning ring 6. A snap-fit ​​block 7 is fixedly connected at equal intervals on the inner wall of the annular cover 5. A snap-fit ​​groove 9 is opened at equal intervals on the outer wall of the positioning ring 6. The snap-fit ​​groove 9 is fixedly fitted on the outer wall of the snap-fit ​​block 7. An easy-tear ring 13 is fixedly connected inside the positioning ring 6. An easy-tear point 16 is opened between the positioning ring 6 and the easy-tear ring 13. A tear plate 15 is fixedly connected to the outer wall of the easy-tear ring 13. A locking plate 8 is fixedly connected to the side wall of the snap-fit ​​block 7.

[0036] Furthermore, each of the three pins of the connecting rod 2 is fitted with a roller, and the three rollers are respectively embedded in the three axial raceways bored out of the inner wall of the ball cage body 1. The large-diameter end of the dust cover 3 is fitted onto the ball cage body 1, and the dust cover 3 is tightly clamped onto the ball cage body 1 by the clamp 4. The clamp 4 is installed on the side of the positioning ring 6 near the small-diameter end of the dust cover 3, and the small-diameter end of the dust cover 3 is fitted onto the connecting rod 2. The end of the annular cover 5 with the snap-fit ​​block 7 is oriented towards the positioning ring 6, and the annular cover 5 is passed through the connecting rod 2 and the dust cover 3 to make the snap-fit ​​block 7 engage. Align block 7 with slot 9, insert block 7 into slot 9, and gradually bring the annular cover 5 closer to clamp 4, so that clamp 4 is positioned between the annular cover 5 and positioning ring 6. Positioning ring 6 is gradually inserted into annular cover 5. When annular cover 5 can no longer move, locking plate 8 and positioning ring 6 fit together, thus fitting annular cover 5 onto positioning ring 6. By inserting block 7 into slot 9, the connection and fixation between annular cover 5 and positioning ring 6 are achieved, forming a protective layer outside clamp 4, thus covering clamp 4. The ball joint body 1 and dust cover 3 are located under the vehicle chassis and are exposed to salt spray, de-icing agents, and mud for extended periods. The annular cover 5 and positioning ring 6 enclose the clamp 4, isolating it from external corrosive media, improving its service life and locking reliability, preventing rusting or breakage, and preventing the dust cover 3 from falling off or grease leakage. In off-road or complex road conditions, foreign objects such as weeds, cables, and plastic bags can easily get stuck in the gaps of the clamp 4. The relatively smooth outer shell of the annular cover 5 and positioning ring 6 eliminates hook points on the clamp 4, reducing the risk of foreign object entanglement. The risk of dust cover 3 being pulled off is reduced, thereby ensuring the reliability of the dust cover 3 seal and preventing external abrasive particles from entering the inner cavity of the ball cage body 1. This solves the problem of abrasive particles damaging the mirror effect of the boring raceway of the ball cage body 1, leading to increased fit clearance, abnormal noise, and the loss of the value of high-precision machining. In addition, the annular cover 5 and the positioning ring 6 act as physical barriers to protect the clamp 4 structure, preventing tools from accidentally hitting the sharp edge of the clamp 4 during maintenance or assembly in the confined engine compartment, which could cause scratches. This also prevents frictional interference between the clamp 4 and surrounding wiring harnesses and oil pipes.

[0037] When maintenance of the CV joint inside the vehicle is required, use a flathead screwdriver or a special plastic pry bar to insert into the joint between the annular cover 5 and the positioning ring 6, and apply external force to separate the annular cover 5 and the positioning ring 6. If the annular cover 5 and the positioning ring 6 are difficult to separate due to structural aging, deformation, or other factors, then use a tool to pry up the tear plate 15 and drag it to cause the tear plate 15 to drive the easy-tear ring 13 to break along the easy-tear point 16, thereby releasing the connection constraint between the annular cover 5 and the positioning ring 6. At this time, the annular cover 5 and the part of the positioning ring 6 connected to it can be easily removed, exposing the clamp 4, so that the clamp 4 can be adjusted, cleaned, or replaced. At the same time, the sealing performance of the dust cover 3 can be checked and repaired. Lubricate or replace the damaged dust cover 3; the annular cover 5 and the positioning ring 6 act as physical barriers, directly bearing external mechanical impacts such as stone impacts and chassis scraping, preventing the clamp 4 from being directly deformed or scratched, and ensuring that the clamp 4's locking force does not decrease; prevent mud and de-icing agents from directly adhering to the gaps of the clamp 4, preventing the clamp 4 from rusting or solidifying due to rust, and reducing the difficulty of disassembly; when the annular cover 5 and the positioning ring 6 are difficult to separate, the easy-tear ring 13 and the easy-tear point 16 serve as destructive disassembly channels, allowing maintenance workers to forcibly tear open the positioning ring 6, avoiding the inability to disassemble the clamp 4 due to the annular cover 5 and the positioning ring 6 being stuck, thus forcing the disassembly of the entire CV joint assembly, reducing the maintenance threshold and cost under extreme working conditions.

[0038] Please see Figure 1 , Figure 3 , Figure 5 and Figure 6 An embodiment of the present invention provides a high-precision boring process for an automotive inner CV joint, comprising a CV joint body 1, a connecting rod 2, and a dust cover 3. A snap-fit ​​block 7 is fixedly connected at equal intervals to the inner wall of an annular cover 5. A snap-fit ​​groove 9 is equidistantly opened on the outer wall of a positioning ring 6. An insertion hole 14 is opened on the side wall of the positioning ring 6. A circumferential plate 10 is symmetrically arranged on the annular cover 5. An insertion block 12 is fixedly connected to the outer wall of the circumferential plate 10. The positioning ring 6 is connected to the circumferential plate 10 via the insertion block 12. An insertion hole 14 is opened on the side wall of the positioning ring 6 and is fixedly fitted onto the outer wall of the insertion block 12. Ribs 24 are fixedly connected at equal intervals to the outer wall of the circumferential plate 10. An annular cover 5 is slidably connected to the outer wall of the ribs 24. The ribs 24 are located on the side of the circumferential plate 10 away from the CV joint body 1. A limit plate 11 is fixedly connected to the side wall of the circumferential plate 10.

[0039] Furthermore, the annular cover 5 is fitted onto the outer wall of the positioning ring 6. After the snap-fit ​​block 7 is inserted into the slot 9, the circumferential plate 10 is moved closer to the positioning ring 6. The circumferential plate 10 drives the insertion block 12 to move closer to the insertion hole 14, so that the insertion block 12 is inserted into the insertion hole 14. The limiting plate 11 on the side wall of the circumferential plate 10 gradually approaches and fits against the annular cover 5. Thus, with the snap-fit ​​block 7 and the slot 9 engaged, the insertion block 12 is further engaged with the insertion hole 14, thereby further improving the connection between the annular cover 5 and the positioning ring 6. The connection is robust; the ribs 24 fit snugly against the annular cover 5, guiding the movement of the circumferential plate 10 and preventing it from tilting during movement. This ensures that the insertion block 12 can be accurately aligned with the insertion hole 14 for insertion. Simultaneously, the circumferential plate 10, the annular cover 5, and the ribs 24 form a honeycomb structure. Therefore, when the annular cover 5 is impacted from the side, the internal structure of the annular cover 5 is laterally compressed. The honeycomb structure formed by the circumferential plate 10 and the ribs 24 absorbs and buffers the impact force, preventing the annular cover 5 from being crushed. The clamp 4 reduces impact damage to the clamp 4, improves the overall impact resistance of the ball cage, extends its service life, and prevents the clamp 4 from undergoing plastic deformation after being squeezed, which would reduce the locking force and cause the dust cover 3 to loosen and leak oil. The circumferential plate 10, the annular cover 5, and the rib 24, through physical contact, convert the impact force into their own deformation, maintaining a safe gap between the annular cover 5 and the clamp 4. Only when the impact force exceeds a preset threshold will the annular cover 5 further squeeze the clamp 4, improving the structural safety redundancy. When the annular cover 5 is subjected to radial impact or During axial compression, the ribs 24 and the circumferential plates 10 provide support to prevent further deformation of the annular cover 5 and ensure that the impact force is not transmitted to the clamp 4, further reducing the probability of deformation or loosening of the clamp 4. After assembly, the positioning ring 6 and the annular cover 5 are firmly connected through a multi-layer snap-fit ​​structure. During vehicle operation, the ball cage rotates continuously with the wheel and is constantly subjected to alternating impact forces from the road surface. The circumferential plates 10, the annular cover 5, and the ribs 24 can maintain a long-term stable connection, avoiding the problem of the dust cover 3 coming loose.

[0040] Please see Figure 1 , Figure 2 , Figure 3 and Figure 5An embodiment of the present invention provides a high-precision boring process for an automotive inner CV joint, comprising a CV joint body 1, a connecting rod 2, and a dust cover 3. A snap-fit ​​block 7 is fixedly connected at equal intervals to the inner wall of an annular cover 5. A slot 9 is equidistantly opened on the outer wall of a positioning ring 6, and an insertion hole 14 is opened on the side wall of the positioning ring 6. A circumferential plate 10 is symmetrically arranged on the annular cover 5. A connecting ring 25 is fixedly connected to the top of the outer wall of the annular cover 5. A rotating ring 26 is rotatably connected to the top of the connecting ring 25. A rotating plate 27 is fixedly connected to the top of the outer wall of the rotating ring 26. A buffer spring 28 is fixedly connected to the top of the outer wall of the rotating plate 27. A protective plate 29 is fixedly connected to the top of the outer wall of the buffer spring 28. The protective plate 29 is movably fitted onto the outer wall of the rotating plate 27. Abutment plates 31 are symmetrically fixedly connected to the bottom of the outer wall of the rotating plate 27.

[0041] Furthermore, the annular cover 5 is fitted onto the outer wall of the positioning ring 6, the snap-fit ​​block 7 is inserted into the snap-fit ​​groove 9, and the insertion block 12 on the circumferential plate 10 is initially inserted into the insertion hole 14. The rotating plate 27 engages with the keyway of the protective plate 29. When the protective plate 29 is rotated, the protective plate 29 drives the rotating plate 27 to rotate, the rotating plate 27 drives the rotating ring 26 to rotate, the rotating ring 26 rotates along the connecting ring 25, and the rotating plate 27 drives the abutment plate 31 to rotate, thereby moving the abutment plate 31 above the circumferential plate 10. As the abutment plate 31 rotates... As the angle of movement changes, the contact plate 31 gradually slides on the circumferential plate 10, gradually pressing the circumferential plate 10 to ensure it fully engages with the positioning ring 6. This ensures the insertion block 12 is further inserted into the insertion hole 14, guaranteeing a tight connection. The active rotation and pressing mechanism ensures complete locking, reliable insertion of the circumferential plate 10 at all positions, and a high degree of fit. This solves the problem of the circumferential plate 10 and insertion block 12 becoming loose due to long-term alternating impacts. The stability of the connection structure is improved. The buffer spring 28 buffers the impact of the road surface on the protective plate 29. When gravel and mud splash onto the surface of the protective plate 29, the impact force is weakened by the buffer spring 28, preventing the annular cover 5 from deforming due to the impact force, extending the service life of the entire connection and fixing structure, and improving the long-term reliability of the structure. In addition, when the structure is subjected to axial impact, the protective plate 29 compresses the buffer spring 28, thereby absorbing the impact and achieving buffering, improving the impact protection performance of the structure, and extending the overall service life of the device. The buffer spring 28 pushes the protective plate 29 to reset through its own elasticity, preventing it from affecting the normal use of the device in the future. It prevents the annular cover 5 from directly and rigidly contacting the clamp 4, preventing the clamp 4 from being squeezed and displaced, which would cause the locking force to fail. At the same time, the buffer spring 28 can also weaken the vibration transmitted to the clamp 4, preventing the structure from vibrating due to impact, and preventing the connecting bolts of the clamp 4 from loosening due to long-term vibration, further improving the overall structural connection stability.

[0042] Please see Figure 1 , Figure 3 , Figure 4 and Figure 7 An embodiment of the present invention provides a high-precision boring process for an automotive inner CV joint, comprising a CV joint body 1, a connecting rod 2, and a dust cover 3. A positioning ring 6 has equidistant slots 9 on its outer wall and insertion holes 14 on its side wall. An impact block 17 is circumferentially arranged on the inner wall of an annular cover 5. A buffer block 18 is symmetrically fixedly connected to the inner wall of the impact block 17. A limit spring 20 is fixedly connected to the inner wall of the impact block 17 and symmetrically arranged on both sides of the buffer block 18. An impact plate 22 is connected to the impact block 17 via the limit spring 20. A weight 19 is fixedly connected to the side wall of the impact plate 22. A slider 23 is symmetrically fixedly connected to the outer wall of the impact plate 22. A slide rail 21 is slidably connected to the outer wall of the slider 23. An impact block 17 is fixedly connected to the outer wall of the slide rail 21. Abutment plates 31 are symmetrically distributed on both sides of a connecting ring 25 and a rotating ring 26. Circumferential plates 10 are symmetrically distributed on both sides of the connecting ring 25 and the rotating ring 26.

[0043] Furthermore, when the vehicle is driving, turning, or traversing bumpy roads, the annular cover 5, impact block 17, buffer block 18, and other structures undergo acceleration changes along with the vehicle chassis. Due to inertia, the weight 19 tends to maintain its original state of motion, causing a relative displacement between the weight 19 and the accelerating or decelerating annular cover 5. During this process, the limiting spring 20 is compressed, accumulating elastic potential energy. When the relative displacement reaches its limit, the weight 19, under the restoring force of the limiting spring 20, violently impacts the inner wall of the annular cover 5. The high-frequency shock wave generated by the impact is transmitted to the surface of the annular cover 5. Furthermore, during steering or acceleration, the weight 19 is thrown radially under centrifugal force. The weight 19 drives the impact plate 22, which in turn drives the slider 23 to slide along the slide rail 21. The weight 19 impacts the inner wall of the annular cover 5, and the limiting spring 20 is stretched during this process. The weight 19 and the impact plate 22 are reset under the restoring force of the limiting spring 20. In winter, after wading or after de-icing agent splashes, water easily seeps into the slot 9 and the insertion hole 14 of the positioning ring 6. When freezing occurs, the positioning ring 6 and the annular cover 5 will freeze together. The weight 19, through continuous impact, generates low-frequency, intermittent... Stress release disrupts the ice crystal growth interface, shattering the microstructure of the ice crystals or preventing the ice layer from forming a continuous rigid bond, thus preventing the formation of a solid ice bridge. This avoids the dust cover 3, positioning ring 6, and annular cover 5 from freezing together, solving the problem of material cracking or tearing caused by icing. During driving, vibration shakes off mud, sand, and de-icing agent residue adhering to the surface of the annular cover 5, preventing these impurities from hardening due to long-term static pressure, thereby ensuring that the annular cover 5 always has effective buffer space. The micro-vibration of the annular cover 5 can prevent jamming between the annular cover 5 and the positioning ring 6. The static friction and adhesion caused by dust accumulation or slight oxidation of the interlocking structure helps maintain the mobility of the interlocking structure and facilitates subsequent disassembly. At the same time, the impact and reset action of the weight 19 provides continuous stress relief for the annular cover 5 and other structures, reducing the risk of material fatigue accumulation and extending the service life of the entire inner ball cage assembly. In addition, a buffer block 18 is provided inside the impact block 17. When the annular cover 5 is impacted and deformed, the annular cover 5 squeezes the impact block 17, and the buffer block 18 provides support to prevent the impact block 17 from being excessively deformed and thus affecting its internal structure.

[0044] Please see Figure 1 , Figure 3 , Figure 4 and Figure 8One embodiment of the present invention provides a high-precision boring process for an automotive inner CV joint, comprising a CV joint body 1, a connecting rod 2, and a dust cover 3. The dust cover 3 is fixedly installed on the outer wall of the CV joint body 1 by a clamp 4. A positioning ring 6 is fixedly connected to the outer wall of the dust cover 3. An annular cover 5 is fixedly fitted onto the outer wall of the positioning ring 6. A sealing ring 32 is fixedly connected to the side wall of the annular cover 5. A second spring 37 is fixedly connected to the side wall of the sealing ring 32. An inertial block 34 is fixedly connected to the side wall of the second spring 37. The inertial block 34 is located inside the annular cover 5. The outer wall of the inertial block 34 is provided with... A sloping block 36 has a first spring 33 fixedly connected to its side wall, and an annular cover 5 fixedly connected to the side wall of the first spring 33. The sloping block 36 and the first spring 33 are symmetrically arranged on both sides of the inertial block 34. The outer wall of the inertial block 34 is symmetrically provided with sloping grooves 35. The inertial block 34 is continuously arranged on the side wall of the sloping grooves 35, and the sloping grooves 35 are movably fitted onto the outer wall of the sloping block 36. A sealing film 30 is fixedly connected to the side of the positioning ring 6 without the insertion hole 14, and the tear plate 15 is attached to the sealing film 30. An easy-tear point 16 is provided between the positioning ring 6 and the easy-tear ring 13.

[0045] Furthermore, the annular cover 5 and the positioning ring 6 form a protective barrier outside the clamp 4, thus protecting the clamp 4. The contact surface between the annular cover 5 and the dust cover 3 is sealed by the sealing ring 32. During long-term use, the annular cover 5 undergoes slight deformation, increasing the gap between the annular cover 5 and the dust cover 3. At this time, the second spring 37 releases its elastic potential energy, causing the sealing ring 32 to compress the dust cover 3, ensuring full contact between the dust cover 3 and the sealing ring 32. After spring 37 releases some of its elastic potential energy, the preload of the second spring 37 decreases. At this time, when the vehicle is driving, turning, or passing over a bumpy road, the inertial block 34 compresses the second spring 37 under its own inertia or centrifugal force. Simultaneously, the inertial block 34 drives the inclined block 36 to compress the first spring 33. The inertial block 34 and the inclined block 36 undergo relative displacement, causing the inclined block 36 to move from the inclined groove 35 near the second spring 37 to the inclined groove 35 away from the second spring 37. The inclined block 36 is in contact with one end of the inclined block 36 while the other end can slide against it, so that the inertial block 34 can only move towards the sealing ring 32. Under the action of the inclined block 36, the inertial block 34 cannot move away from the sealing ring 32. As a result, after the second spring 37 releases the preload, it will continue to be compressed under the action of the inertial block 34 as the vehicle moves. This ensures that the second spring 37 can further squeeze and drive the sealing ring 32, always maintaining a tight fit with the dust cover 3. This avoids the problem of the gap between the annular cover 5 and the dust cover 3 becoming larger, which would lead to the failure of protection. It extends the reliability and service life. The adaptive sealing adjustment mechanism does not require additional manual intervention and achieves dynamic compensation by relying on the inertia and centrifugal force during vehicle movement. A sealing film 30 is set on the positioning ring 6 to seal the easy-tear point 16 on the positioning ring 6. When disassembling, the sealing film 30 at the tear plate 15 is cut open with a knife, and the easy-tear ring 13 is pulled by the tear plate 15 to disassemble.

[0046] Working principle: The annular cover 5, protective plate 29, rotating plate 27 and other structures pass through the connecting rod 2 and dust cover 3. The snap-fit ​​block 7 is inserted into the slot 9 so that the clamp 4 is located between the annular cover 5 and the positioning ring 6. The circumferential plate 10 is moved so that the plug-in block 12 is inserted into the plug hole 14 to connect and fix the annular cover 5 and the positioning ring 6.

[0047] When the annular cover 5 is subjected to radial impact, the circumferential plate 10 and the rib 24 absorb and buffer the impact force to prevent the annular cover 5 from squeezing the clamp 4. When the annular cover 5 is subjected to axial impact, the protective plate 29 bears the impact and the buffer spring 28 buffers it.

[0048] When the vehicle is driving, turning, or passing over bumpy roads, the weight 19 compresses the limiting spring 20 under the action of inertial force. The limiting spring 20 drives the weight 19 to hit the inner wall of the annular cover 5, causing the annular cover 5 to vibrate slightly and shake off the attached objects on the surface of the annular cover 5. When performing maintenance, external force is applied to separate the annular cover 5 from the positioning ring 6. When the annular cover 5 and the positioning ring 6 are difficult to separate, the tear plate 15 is dragged to make the easy-tear ring 13 break and separate along the easy-tear point 16.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-precision boring process for automotive inner CV joints, characterized in that: The cage includes a main body (1), a connecting rod (2), and a dust cover (3). The main body (1) is provided with a connecting rod (2). The outer wall of the connecting rod (2) is fixedly fitted with a dust cover (3). The dust cover (3) is fixedly installed on the outer wall of the main body (1) by a clamp (4). The outer wall of the dust cover (3) is fixedly connected with a positioning ring (6). The outer wall of the positioning ring (6) is fixedly fitted with an annular cover (5). The inner wall of the annular cover (5) is fixedly connected with a snap-fit ​​block (7) at equal intervals. The outer wall of the positioning ring (6) is provided with a snap-fit ​​groove (9) at equal intervals. The snap-fit ​​groove (9) is fixedly fitted on the outer wall of the snap-fit ​​block (7). The positioning ring (6) is fixedly connected with an easy-tear ring (13). An easy-tear point (16) is provided between the positioning ring (6) and the easy-tear ring (13). The outer wall of the easy-tear ring (13) is fixedly connected with a tear plate (15).

2. The high-precision boring process for an automotive inner CV joint according to claim 1, characterized in that: The annular cover (5) is symmetrically provided with a circumferential plate (10). A plug-in block (12) is fixedly connected to the outer wall of the circumferential plate (10). A positioning ring (6) is connected to the circumferential plate (10) through the plug-in block (12). A plug hole (14) is opened on the side wall of the positioning ring (6). The plug hole (14) is fixedly fitted on the outer wall of the plug-in block (12). Ribs (24) are fixedly connected at equal intervals to the outer wall of the circumferential plate (10). The annular cover (5) is slidably connected to the outer wall of the ribs (24). The ribs (24) are located on the side of the circumferential plate (10) away from the main body of the ball cage (1).

3. The high-precision boring process for an automotive inner CV joint according to claim 2, characterized in that: The top of the outer wall of the annular cover (5) is fixedly connected to a connecting ring (25), the top of the connecting ring (25) is rotatably connected to a rotating ring (26), the top of the outer wall of the rotating ring (26) is fixedly connected to a rotating plate (27), the top of the outer wall of the rotating plate (27) is fixedly connected to a buffer spring (28), the top of the outer wall of the buffer spring (28) is fixedly connected to a protective plate (29), the protective plate (29) is movably fitted on the outer wall of the rotating plate (27), and the bottom of the outer wall of the rotating plate (27) is symmetrically fixedly connected to abutment plates (31).

4. The high-precision boring process for an automotive inner CV joint according to claim 3, characterized in that: An impact block (17) is circumferentially arranged on the inner wall of the annular cover (5). A buffer block (18) is symmetrically fixedly connected to the inner wall of the impact block (17). A limit spring (20) is fixedly connected to the inner wall of the impact block (17). The limit spring (20) is symmetrically arranged on both sides of the buffer block (18). An impact plate (22) is connected to the impact block (17) through the limit spring (20). A weight (19) is fixedly connected to the side wall of the impact plate (22). A slider (23) is symmetrically fixedly connected to the outer wall of the impact plate (22). A slide rail (21) is slidably connected to the outer wall of the slider (23). An impact block (17) is fixedly connected to the outer wall of the slide rail (21). A contact plate (31) is symmetrically distributed on both sides of the connecting ring (25) and the rotating ring (26). A circumferential plate (10) is symmetrically distributed on both sides of the connecting ring (25) and the rotating ring (26).

5. The high-precision boring process for an automotive inner CV joint according to claim 1, characterized in that: A sealing film (30) is fixedly connected to the side of the positioning ring (6) without the insertion hole (14), and the tear plate (15) is attached to the sealing film (30).

6. The high-precision boring process for an automotive inner CV joint according to claim 2, characterized in that: The circumferential plate (10) is fixedly connected to a limiting plate (11) on its side wall, and the snap-fit ​​block (7) is fixedly connected to a locking plate (8) on its side wall. The locking plate (8) is in contact with the positioning ring (6).

7. The high-precision boring process for an automotive inner CV joint according to claim 2, characterized in that: A sealing ring (32) is fixedly connected to the side wall of the annular cover (5), a second spring (37) is fixedly connected to the side wall of the sealing ring (32), and an inertial block (34) is fixedly connected to the side wall of the second spring (37). The inertial block (34) is located inside the annular cover (5).

8. The high-precision boring process for an automotive inner CV joint according to claim 7, characterized in that: The outer wall of the inertial block (34) is provided with a slope block (36), the side wall of the slope block (36) is fixedly connected with a first spring (33), the side wall of the first spring (33) is fixedly connected with an annular cover (5), and the slope block (36) and the first spring (33) are symmetrically arranged on both sides of the inertial block (34).

9. The high-precision boring process for an automotive inner CV joint according to claim 8, characterized in that: The outer wall of the inertial block (34) is symmetrically provided with inclined grooves (35), the inertial block (34) is continuously provided on the side wall of the inclined groove (35), and the inclined groove (35) is movably fitted on the outer wall of the inclined block (36).

10. The high-precision boring process for an automotive inner CV joint according to claim 3, characterized in that: The rotating plate (27) and the protective plate (29) are movably fitted on the outer wall of the dust cover (3), and the dust cover (3) passes through the connecting ring (25) and the rotating ring (26).

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