Anti-falling telescopic constant velocity universal joint

Abstract

The utility model relates to the technical field of universal joints, in particular to an anti-falling telescopic type constant velocity universal joint which comprises a tripod type constant velocity universal joint, a fixing assembly and a rivet. The tripod type constant velocity universal joint comprises a three-column groove shell and a tripod; a ball groove is formed in the three-column groove shell, and arc-shaped grooves are formed in the ball groove in an annular array mode. The tripod is installed in the ball groove in a sliding mode, the tripod is composed of a tripod joint and a needle bearing, and the tripod joint is installed in the ball groove in a sliding mode; the needle bearing is mounted on the Y-joint in a sliding manner, and the outer arc of the needle bearing is attached to the arc-shaped groove; riveting points are symmetrically arranged at the two ends of the arc-shaped grooves. The three-ball-pin type constant velocity universal joint comprises a three-ball-pin type constant velocity universal joint body, a rivet is arranged in the three-ball-pin type constant velocity universal joint body, a connecting groove is formed between every two adjacent riveting points, a fixing assembly is arranged in each connecting groove, the rivet is located in the riveting points, and when the three-ball-pin type constant velocity universal joint body works, the rivets are fixed through the fixing assemblies and prevented from falling off. And therefore, the stability of fixed installation of the rivets in the riveting points is ensured.

Description

Technical Field

[0001] This utility model relates to the field of universal joint technology, specifically to an anti-detachment telescopic constant velocity universal joint. Background Technology

[0002] The three-ball pin constant velocity joint, a type of telescopic constant velocity joint, is a key component in automobiles. It is a constant velocity joint that can change its working angle and perform telescopic sliding movements. The three-ball pin constant velocity joint is widely used due to its advantages of high precision, long service life, high strength, and simple assembly.

[0003] The three-ball pin constant velocity universal joint is mainly composed of a three-column groove shell and three ball pins. In the production process, the three ball pins are slidably installed in the three-column groove shell, and then the end face of the three-column groove shell is riveted by hydraulic equipment to limit the movement of the three ball pins, thereby ensuring the stability of the operation of the three-ball pin constant velocity universal joint.

[0004] However, during the production process, when riveting the end face of the three-column groove shell, the large structural area of ​​the riveting point requires a high tonnage of the hydraulic equipment. At the same time, the rivets are prone to falling out of the riveting point under the action of external force, which affects the restriction of the three ball pins, thereby affecting the strength and accuracy of the three-ball pin constant velocity universal joint, resulting in a decrease in the product qualification rate.

[0005] To address this, existing technology proposes a three-ball pin constant velocity universal joint (publication number: CN209012283U). This device restricts the movement of the outer ring and reduces noise and vibration by making the side of the roller rail convex and the outer side of the outer ring concave, corresponding to the convex side of the roller rail. However, it still does not solve the problem that the rivets are prone to detaching from the rivet point, affecting the strength and accuracy of the three-ball pin constant velocity universal joint.

[0006] In view of this, we propose a non-detachable telescopic constant velocity universal joint. Utility Model Content

[0007] The purpose of this invention is to provide an anti-fall-off telescopic constant velocity universal joint to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A non-detachable telescopic constant velocity universal joint includes a three-ball pin type constant velocity universal joint, a fixing component, and rivets. The three-ball pin type constant velocity universal joint includes a three-column groove housing and three ball pins. The three-column groove housing has a ball track, and the ball track has an annular array of arc-shaped grooves. The three ball pins are slidably installed within the ball track, and each ball pin is composed of a three-pronged joint and a needle roller bearing. The three-pronged joint is slidably installed within the ball track. The needle roller bearing is slidably installed on the three-pronged joint, and the needle roller bearing is in contact with the arc-shaped groove. The arc-shaped groove serves a positioning function. During installation, the needle roller bearing is aligned with the arc-shaped groove to ensure installation accuracy. Multiple arc-shaped grooves are arranged in pairs... The joint has symmetrically arranged rivet points; a connecting groove is provided between two adjacent rivet points, and a fixing component is provided in the connecting groove. The rivet is located in the rivet point. Under the action of hydraulic equipment, the rivet is deformed and pressed into the rivet point, making close contact with the rivet point, which enhances the interaction force between the rivet and the rivet point, thereby fixing the rivet in the rivet point. When the three-ball pin constant velocity universal joint is working, the fixing component fixes the rivet to prevent the rivet from falling off. The fixing component fixes the rivet to prevent it from falling off from the rivet point due to external vibration, which would cause the three-ball pin to slip off and affect the normal use of the three-ball pin constant velocity universal joint.

[0010] Preferably, the arc-shaped groove is provided with an inclined surface, which is used to assist the rivet in limiting the three-ball pin. When the rivet falls off under severe vibration, the inclined surface can block the three-ball pin to ensure that the three-ball pin will not fall off immediately and affect the use of the three-ball pin constant velocity universal joint.

[0011] Preferably, a pressure-increasing protrusion is provided at the middle of the riveting point, and a chamfer of 30° is provided on the riveting point. The protrusion is added to enhance the interaction force between the riveting point and the rivet, thereby enhancing the fixing effect of the riveting point on the rivet and ensuring the stability of the rivet installation. The 30° chamfer at the riveting joint reduces the concentrated stress on the riveting point, thus ensuring the stability of the riveting point and the rivet. At the same time, the 30° bevel is longer, which can better guide the rivet into the riveting point and reduce friction and resistance during insertion.

[0012] Preferably, the connecting groove has a V-shaped structure, with a connecting hole at the inflection point of the V-shaped structure, a threaded groove at the bottom of the connecting hole, and a fixing groove at the middle of the connecting hole. The V-shaped structure can evenly distribute the load to the riveting points at both ends, avoiding excessive force on one side and ensuring the stability of the connection at both ends.

[0013] Preferably, the V-shaped structure is 90°. The 90° angle makes the V-shaped structure completely symmetrical in the horizontal and vertical directions, and the force is evenly distributed. This ensures that the force exerted by the rivets on both sides is evenly distributed, and avoids the phenomenon of rivets on one side coming off.

[0014] Preferably, the fixing assembly includes a connecting spring, a fixing post, and a ball bearing; the connecting spring is fixedly installed in the connecting groove, and the connecting spring has three fixing holes, which correspond to the riveting point and the connecting hole. The fixing holes at both ends of the connecting spring are used for fixing rivets. The rivets are pressed into the riveting point under the action of hydraulic equipment. During the riveting process, the rivets deform and are fixedly connected to the connecting spring, so that the rivets and the connecting spring form a whole. A fixing post is fixedly installed on the connecting spring; the fixing post is slidably installed in the connecting groove, and the fixing post is fixedly installed on the connecting groove. The fixing post has a thread at its bottom end that mates with a screw groove inside the fixing hole at the middle end of the connecting spring. The fixing post is fixedly installed in the connecting hole through the thread and compresses the connecting spring to ensure the stability of the connecting spring, thereby ensuring the stability of the rivet connection at both ends of the connecting spring. A sliding cavity is opened at the middle end of the fixing post, and a ball is slidably installed in the sliding cavity. The ball is located in the fixing groove and is used to enhance the stability of the fixing post. The ball is slidably installed in the sliding cavity, and a part of the ball is located outside the sliding cavity and contacts the fixing groove, thereby ensuring the stability of the fixing post connection.

[0015] Preferably, the connecting spring has a stepped structure, with the thickness at both ends being less than that at the middle. The fixing holes at both ends of the connecting spring have chamfered edges for riveting point engagement. The stepped structure of the connecting spring ensures the flatness of the three-column slot shell surface, preventing surface protrusions that could affect its use. Simultaneously, the stepped structure improves the stability of the connecting spring's own fixation, preventing it from easily moving and thus ensuring the stability of the rivet connected to it. The chamfered edges on the connecting spring ensure the stability of the riveting point, allowing for better connection between the rivet and the connecting spring during riveting, thus improving the connecting spring's fixing effect on the rivet.

[0016] Compared with the prior art, the beneficial effects of this utility model are: the uniform arrangement of the rivet points reduces the concentrated stress on the rivet points, thereby ensuring the stability of the rivet fixing installation within the rivet points. At the same time, connecting adjacent rivets to form a whole improves the rivet's ability to withstand external forces and enhances the stability of the rivet connection. Attached Figure Description

[0017] Figure 1 This is a half-sectional schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This utility model Figure 1 A magnified view of point A;

[0019] Figure 3 This is a horizontal sectional view of the overall structure of this utility model;

[0020] Figure 4 This utility model Figure 3 A magnified view of point B;

[0021] Figure 5 This is a stepped sectional view of the overall structure of this utility model;

[0022] Figure 6 This utility model Figure 5 A magnified view of point C;

[0023] Figure 7 This is a schematic diagram of the overall connecting spring of this utility model;

[0024] Figure 8 This is a half-sectional schematic diagram of the fixing column of this utility model.

[0025] In the picture:

[0026] 1. Three-ball pin constant velocity universal joint; 11. Three-column groove housing; 111. Ball track; 112. Arc groove; 1121. Bevel; 113. Riveting point; 1131. Pressure boosting protrusion; 1132. Chamfer; 114. Connecting groove; 1141. V-shaped structure; 1142. Connecting hole; 1143. Fixing groove; 12. Three-ball pin; 121. Three-way joint; 122. Needle roller bearing;

[0027] 2. Fixing component; 21. Connecting spring; 211. Fixing hole; 212. Stepped structure; 22. Fixing post; 221. Sliding cavity; 23. Ball bearing;

[0028] 3. Rivets. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] like Figures 1 to 8As shown, an anti-detachment telescopic constant velocity universal joint includes a three-ball pin type constant velocity universal joint 1, a fixing component 2, and rivets 3. The three-ball pin type constant velocity universal joint 1 includes a three-column groove shell 11 and three ball pins 12. The three-column groove shell 11 has a ball track 111, and the ball track 111 has an annular array of arc-shaped grooves 112. The three ball pins 12 are slidably installed in the ball track 111. The three ball pins 12 are composed of a three-pronged joint 121 and a needle roller bearing 122. The three-pronged joint 121 is slidably installed in the ball track 111. The needle roller bearing 122 is slidably installed on the three-pronged joint 121. The arc-shaped groove 112 fits snugly against the three-ball pin constant velocity universal joint 1, serving a positioning function. During installation, the needle roller bearing 122 is aligned with the arc-shaped groove 112 to ensure accurate installation. Multiple arc-shaped grooves 112 have symmetrically arranged rivet points 113 at both ends. Each arc-shaped groove 112 corresponds to one of the three ball pins 12, totaling three. Each of the four ends of the arc-shaped groove 112 has a rivet point 113, for a total of twelve rivet points 113. The symmetrical arrangement of the rivet points 113 ensures uniform stress distribution, avoids localized stress concentration, and improves the stability of the riveting. The arc-shaped groove 112 has an oblique... Surface 1121, the inclined surface 1121 is used to assist the rivet 3 in limiting the three-ball pin 12. When the rivet 3 falls off under severe vibration, the inclined surface 1121 can block the three-ball pin 12 to ensure that the three-ball pin 12 does not fall off immediately and affect the use of the three-ball pin constant velocity universal joint 1. At the same time, the inclined surface 1121 plays a role in relieving force, reducing the vibration of the rivet 3, and improving the stability of the rivet 3 connection; a connecting groove 114 is opened between two adjacent riveting points 113, and a fixing component 2 is provided in the connecting groove 114. The connecting groove 114 has a V-shaped structure 1141. A connecting hole 1142 is provided at the inflection point of the structure 1141. The bottom end of the connecting hole 1142 is provided with a threaded groove, and the middle end of the connecting hole 1142 is provided with a fixing groove 1143. The V-shaped structure 1141 can evenly distribute the load to the riveting points 113 at both ends, avoid excessive force on one side, and ensure the stability of the connection at both ends. The V-shaped structure 1141 is 90°, which makes the V-shaped structure 1141 completely symmetrical in the horizontal and vertical directions, and evenly distributes the force, thereby ensuring the force exerted on it by the rivets 3 on both sides, ensuring that the rivets 3 on both sides are evenly stressed, and preventing the phenomenon of rivets 3 on one side from coming off.

[0031] The rivet 3 is located within the riveting point 113. Under the action of hydraulic equipment, the rivet 3 deforms and is pressed into the riveting point 113, making close contact with it. This enhances the interaction force between the rivet 3 and the riveting point 113, thus fixing the rivet 3 within the riveting point 113. A pressure-increasing protrusion 1131 is provided at the center of the riveting point 113, and a chamfer 1132 of 30° is formed on the riveting point 113. The protrusion enhances the interaction force between the riveting point 113 and the rivet 3, thereby strengthening the fixing effect of the riveting point 113 on the rivet 3 and ensuring the installation of the rivet 3. To ensure stability, a 30° chamfer 1132 is provided at the riveting joint to reduce the concentrated stress on the riveting point 113, thereby ensuring the stability of the riveting point 113 and the rivet 3. At the same time, the 30° inclined surface 1121 is longer, which can better guide the rivet 3 into the riveting point 113 and reduce friction and resistance during insertion. When the three-ball pin constant velocity universal joint 1 is working, the fixing component 2 fixes the rivet 3 to prevent the rivet 3 from falling off. The fixing component 2 fixes the rivet 3 to prevent the rivet 3 from falling off from the riveting point 113 due to external vibration, which would cause the three-ball pin 12 to slip off and affect the normal use of the three-ball pin constant velocity universal joint 1.

[0032] The connecting spring 21 is fixedly installed in the connecting groove 114. The connecting spring 21 has three fixing holes 211, which correspond to the riveting point 113 and the connecting hole 1142. The fixing holes 211 at both ends of the connecting spring 21 are used for fixing the rivet 3. Under the action of hydraulic equipment, the rivet 3 is pressed into the riveting point 113. During the riveting process, the rivet 3 deforms and is fixedly connected to the connecting spring 21, making the rivet 3 and the connecting spring 21 a whole. A fixing device is fixedly installed on the connecting spring 21. Fixed post 22; The fixed post 22 is slidably installed in the connecting groove 114 and fixedly installed in the fixing hole 211 at the middle end of the connecting spring 21. The bottom end of the fixed post 22 is provided with a thread that mates with the threaded groove. The fixed post 22 is fixedly installed in the connecting hole 1142 through the thread, and compresses the connecting spring 21 to ensure the stability of the connecting spring 21, thereby ensuring the stability of the riveting of the rivets 3 at both ends of the connecting spring 21. The connecting spring 21 connects adjacent rivets 3 to form a whole, improving the rivet 3's ability to withstand external forces. The stability of the rivet 3 connection is improved. When the rivet 3 tends to fall off, the connecting spring 21 will generate a reverse force on the rivet 3, counteracting the force when the rivet 3 falls off. At the same time, it will transfer the force of the rivet 3 falling off to the other end, reducing the force on itself and ensuring its own stability. The connecting spring 21 has a stepped structure 212. The thickness of the connecting spring 21 at both ends is less than that at the middle end. The fixing holes 211 at both ends of the connecting spring 21 are provided with chamfers 1132 for riveting points 113 to fit. The trapezoidal structure 212 ensures the flatness of the surface of the three-column groove shell 11, preventing bulges on the surface of the three-column groove shell 11 from affecting its use. At the same time, the stepped structure 212 improves the stability of the connecting spring 21 itself, making the connecting spring 21 less prone to movement, thereby ensuring the stability of the rivet 3 connected to it. The chamfer 1132 on the connecting spring 21 ensures the stability of the riveting point 113, allowing the rivet 3 to connect better with the connecting spring 21 when the rivet 3 is riveted, thus improving the fixing effect of the connecting spring 21 on the rivet 3.

[0033] A sliding cavity 221 is provided at the middle of the fixed post 22, and a ball bearing 23 is slidably installed in the sliding cavity 221. The ball bearing 23 is located in the fixing groove 1143. The ball bearing 23 is used to enhance the stability of the fixed post 22. The ball bearing 23 is slidably installed in the sliding cavity 221, and a part of the ball bearing 23 is located outside the sliding cavity 221 and contacts the fixing groove 1143, thereby ensuring the stability of the connection of the fixed post 22. When the fixing shaft gradually moves downward into the connecting hole 1142, the ball bearing 23 is completely located in the sliding cavity 221 under the action of the connecting hole 1142, and will not affect the stability of the connection. When the fixed post 22 is installed, after the thread of the fixed post 22 is connected to the threaded groove, the sliding cavity 221 is connected to the fixed groove 1143. The ball 23 slides out from the sliding cavity 221, and part of the ball 23 is located in the fixed groove 1143, ensuring the stability of the connection of the fixed post 22. At the same time, when the three-ball pin universal joint rotates at high speed, the three-ball pin universal joint generates centrifugal force acting on the ball 23, increasing the sliding part of the ball 23 from the sliding cavity 221, enhancing the fixing effect on the fixed post 22, thereby ensuring the stability of the connecting spring 21 and ensuring that the rivet 3 will not slip out from the riveting point 113.

[0034] In use, the anti-detachment telescopic constant velocity universal joint of this utility model is as follows: the connecting spring 21 is fixedly installed in the connecting groove 114, the ball 23 is pressed into the sliding cavity 221 of the fixing post 22, and then the fixing post 22 is fixedly installed in the connecting hole 1142 through the threaded groove. After the fixing post 22 is installed, it exerts a squeezing force on the connecting spring 21 to ensure the stability of the connecting spring 21 installation. At the same time, the ball 23 is no longer subjected to the squeezing force of the inner wall of the connecting hole 1142 and slides out from the sliding cavity 221, partially located in the fixing groove 1143, ensuring the stability of the fixing post 22. Then, the rivet 3 is inserted into the riveting point 113. Under the action of the hydraulic equipment, the rivet 3 is riveted into the riveting point 113, so that the rivet 3 is fixedly connected to the riveting point 113 and the connecting spring 21.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A telescopic constant velocity universal joint with anti-detachment feature, characterized in that: It includes a three-ball pin constant velocity universal joint (1), a fixing component (2) and a rivet (3); The three-ball pin constant velocity universal joint (1) includes a three-column groove shell (11) and three ball pins (12). The three-column groove shell (11) has a ball track (111) and an arc-shaped groove (112) is arranged in a ring on the ball track (111). The three-ball pin (12) is slidably installed in the ball track (111). The three-ball pin (12) is composed of a three-pronged joint (121) and a needle roller bearing (122). The three-pronged joint (121) is slidably installed in the ball track (111). The needle roller bearing (122) is slidably installed on the three-pronged joint (121) and fits against the arc groove (112). Multiple arc-shaped grooves (112) are symmetrically arranged with rivet points (113) at both ends; a connecting groove (114) is provided between two adjacent rivet points (113), and a fixing component (2) is provided in the connecting groove (114). The rivet (3) is located in the rivet point (113). When the three-ball pin constant velocity universal joint (1) is working, the fixing component (2) fixes the rivet (3) to prevent the rivet (3) from falling off.

2. The telescopic constant velocity universal joint according to claim 1, characterized in that: An inclined surface (1121) is provided on the arc-shaped groove (112).

3. The telescopic constant velocity universal joint according to claim 1, characterized in that: The rivet point (113) is provided with a pressure-increasing protrusion (1131) at the middle end, and a chamfer (1132) is provided on the rivet point (113), the chamfer (1132) being 30°.

4. The telescopic constant velocity universal joint according to claim 3, characterized in that: The connecting groove (114) has a V-shaped structure (1141), and a connecting hole (1142) is provided at the inflection point of the V-shaped structure (1141). A threaded groove is provided at the bottom of the connecting hole (1142), and a fixing groove (1143) is provided at the middle of the connecting hole (1142).

5. The telescopic constant velocity universal joint according to claim 4, characterized in that: The V-shaped structure (1141) is 90°.

6. The telescopic constant velocity universal joint according to claim 1, characterized in that: The fixing component (2) includes a connecting spring (21), a fixing post (22), and a ball bearing (23); The connecting spring (21) is fixedly installed in the connecting groove (114). The connecting spring (21) has three fixing holes (211), which correspond to the riveting point (113) and the connecting hole (1142). A fixing post (22) is fixedly installed on the connecting spring (21). The fixing post (22) is slidably installed in the connecting groove (114). The bottom end of the fixing post (22) is provided with a thread that matches the screw groove. The middle end of the fixing post (22) is provided with a sliding cavity (221). A ball (23) is slidably installed in the sliding cavity (221). The ball (23) is located in the fixed groove (1143).

7. The telescopic constant velocity universal joint according to claim 6, characterized in that: The connecting spring (21) has a stepped structure (212). The thickness of the two ends of the connecting spring (21) is less than that of the middle end. The fixing holes (211) at both ends of the connecting spring (21) are provided with chamfers (1132) for riveting points (113).

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