Three-ball-pin universal joint with ball ring anti-falling structure

Abstract

The utility model relates to the technical field of tripod universal joints, in particular to a tripod universal joint with a ball ring anti-falling structure, which comprises a tripod ring frame, a spline is arranged in the tripod ring frame, three pin shaft frames are uniformly arranged on the tripod ring frame, limiting ring grooves are formed in the pin shaft frames, limiting baffle rings are arranged in the limiting ring grooves, and the ball ring anti-falling structure is arranged in the limiting baffle rings. A plurality of limiting teeth are arranged on the limiting baffle ring, the outer side of the pin shaft frame is sleeved with a universal ball ring inner ring, a gap ring groove is formed in the inner side of the universal ball ring inner ring, a plurality of fixing threaded holes are formed in the side end of the universal ball ring inner ring, and a universal ball ring outer ring is arranged on the outer side of the universal ball ring inner ring; according to the tripod universal joint with the ball ring anti-falling structure, the limiting baffle ring is additionally arranged, so that in the use process of the universal joint, the limiting ring groove, the limiting baffle ring, the limiting teeth and the clearance ring groove are in clearance fit, the universal ball ring inner ring and the universal ball ring outer ring are prevented from falling off, and the service life of the universal joint is prolonged. And the practicability of the device is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of three-ball pin universal joints, and particularly relates to a three-ball pin universal joint with a ball ring anti-detachment structure. Background Technique

[0002] The three-ball pin universal joint is a rotational transmission part that can transmit large torques and rotations with relatively large angular deviations. It is widely used in fields such as automobiles, machinery, and ships. The working principle of this universal joint is to transmit torque through the sliding of the ball ring on the three-groove housing and compensate for the change in the axial length of the universal joint to adapt to the angular and length changes during the transmission process. Its characteristics include a simple structure, strong self-adjusting ability, high transmission efficiency, strong durability, and a wide range of applications. During operation, the three-ball pin universal joint can automatically adjust to any angle to ensure the stability and accuracy of the transmission. At the same time, it is manufactured using high-quality materials and advanced technologies, and has strong anti-fatigue performance.

[0003] Although the existing three-ball pin universal joints achieve multi-angle transmission in terms of structure, under certain extreme working conditions, the connection stability between the inner ring and the outer ring of the universal ball ring still needs to be improved. Specifically, long-term high-load operation or severe vibration may cause the connection part to loosen, thereby increasing the risk of the universal ball ring falling off and affecting the stability and safety of the transmission system. Therefore, to solve the above problems, we propose a three-ball pin universal joint with a ball ring anti-detachment structure. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a three-ball pin universal joint with a ball ring anti-detachment structure, which solves the technical problems that the connection stability between the inner ring and the outer ring of the universal ball ring still needs to be improved, and long-term high-load operation or severe vibration may cause the connection part to loosen, thereby increasing the risk of the universal ball ring falling off and affecting the stability and safety of the transmission system.

[0006] (2) Technical Solutions

[0007] To achieve the above objectives, the utility model is realized through the following technical solutions:

[0008] A three-ball pin universal joint with a spherical ring anti-disengagement structure, comprising a three-pin ring frame. A spline is arranged inside the three-pin ring frame. Three pin shafts frames are evenly arranged on the three-pin ring frame. Limiting ring grooves are arranged on the pin shafts frames. Limiting retaining rings are arranged in the limiting ring grooves. A number of limiting teeth are arranged on the limiting retaining rings. Universal spherical ring inner rings are sleeved on the outer sides of the pin shafts frames. Clearance ring grooves are arranged on the inner sides of the universal spherical ring inner rings. A number of fixing threaded holes are arranged at the side ends of the universal spherical ring inner rings. A universal spherical ring outer ring is arranged on the outer side of the universal spherical ring inner ring. Fixing retaining rings are arranged on the outer sides of the pin shafts frames. A number of threaded pins are threadedly installed on the fixing retaining rings. Each threaded pin is threadedly installed with the corresponding fixing threaded hole. Each limiting tooth is arranged inside the clearance ring groove.

[0009] Preferably: The pin shaft frame is drum-shaped. A transition gap is left between the fixing retaining ring and the curved neck of the pin shaft frame, and the gap is smaller than the drum-shaped pin shaft of the pin shaft frame. The length of the diagonal line of the longitudinal section of the pin shaft frame is less than or equal to the length of the cross-sectional diameter at the geometric center of the pin shaft frame.

[0010] Preferably: The overall shape of the universal spherical ring outer ring is drum-shaped. There is an interference fit between the universal spherical ring inner ring and the pin shaft frame. The connection between the pin shaft frame and the three-pin ring frame is an inward concave arc transition, and the curvature of the inward concave arc transition at the connection is smaller than the curvature of the side of the pin shaft frame.

[0011] (III) Beneficial effects

[0012] First, the limiting ring groove arranged on the pin shaft frame, the limiting retaining ring arranged in the limiting ring groove, the limiting teeth arranged on the limiting retaining ring, are in clearance fit with the clearance ring groove on the universal spherical ring inner ring, so that during the process of adjusting the angle between the pin shaft frame and the universal spherical ring inner ring, the universal spherical ring inner ring and the universal spherical ring outer ring can be effectively prevented from falling off. By designing and installing a limiting retaining ring on the three-ball pin universal joint with a spherical ring anti-disengagement structure, during the use of the universal joint, the limiting ring groove, the limiting retaining ring, and the limiting teeth are in clearance fit with the clearance ring groove, thereby preventing the universal spherical ring inner ring and the universal spherical ring outer ring from falling off, effectively improving the practicability of the device.

[0013] Second, a transition gap is left between the fixing retaining ring and the curved neck of the pin shaft frame, and the gap is smaller than the drum-shaped pin shaft of the pin shaft frame, so that when the universal spherical ring inner ring completes the swing angle, the fixing retaining ring can effectively limit the universal spherical ring inner ring and the universal spherical ring outer ring outside the pin shaft frame to prevent the universal spherical ring inner ring and the universal spherical ring outer ring from falling off. By designing and installing a fixing retaining ring on the three-ball pin universal joint with a spherical ring anti-disengagement structure, during the use of the universal joint, the fixing retaining ring cooperates with the threaded pin to limit the fixing retaining ring, thereby preventing the universal spherical ring inner ring and the universal spherical ring outer ring from falling off. On the basis of the first-layer anti-disengagement design of the limiting retaining ring, it plays a dual protection role, effectively improving the practicability of the device. Description of the drawings

[0014] The above description is only an overview of the technical solution of the present utility model. In order to understand the technical means of the present utility model more clearly and to be implemented in accordance with the content of the specification, the following will be described in detail with reference to the preferred embodiments of the present utility model and the accompanying drawings.

[0015] Figure 1 It is a structural diagram of the three-pin ring frame of the present utility model;

[0016] Figure 2 It is a structural diagram of the dissection of the three-pin ring frame of the present utility model;

[0017] Figure 3 It is a three-dimensional exploded structural diagram of the inner ring of the universal ball ring of the present utility model;

[0018] Figure 4 It is a structural diagram of the dissection of the inner ring of the universal ball ring of the present utility model.

[0019] Legend: 1. Three-pin ring frame; 11. Spline; 12. Pin shaft frame; 13. Limit ring groove; 14. Limit retaining ring; 15. Limit teeth; 2. Inner ring of universal ball ring; 21. Clearance ring groove; 22. Fixed threaded hole; 23. Outer ring of universal ball ring; 24. Fixed retaining ring; 25. Threaded pin. Detailed implementation manners

[0020] By providing a three-ball pin universal joint with a ball ring anti-detachment structure in the embodiments of the present application, the technical problem that the connection stability between the inner ring and the outer ring of the universal ball ring still needs to be improved, and long-term high-load operation or severe vibration may cause the connection part to loosen, thereby increasing the risk of the universal ball ring falling off and affecting the stability and safety of the transmission system is effectively solved.

[0021] Embodiment

[0022] According to Figure 1 、 Figure 2 、 Figure 3 、and Figure 4 As shown, the technical solution in the embodiments of the present application effectively solves the technical problem that the connection stability between the inner ring and the outer ring of the universal ball ring still needs to be improved, and long-term high-load operation or severe vibration may cause the connection part to loosen, thereby increasing the risk of the universal ball ring falling off and affecting the stability and safety of the transmission system. The general idea is as follows:

[0023] In view of the problems existing in the prior art, the utility model provides a three-ball pin universal joint with a ball ring anti-detachment structure, which includes a three-pin ring frame 1. A spline 11 is arranged inside the three-pin ring frame 1. Three pin shafts frames 12 are evenly arranged on the three-pin ring frame 1. A limit ring groove 13 is arranged on each of the pin shafts frames 12. A limit retaining ring 14 is arranged in each of the limit ring grooves 13. A number of limit teeth 15 are arranged on the limit retaining ring 14. A universal ball ring inner ring 2 is sleeved on the outer side of each of the pin shafts frames 12. A clearance ring groove 21 is arranged on the inner side of each of the universal ball ring inner rings 2. A number of fixing threaded holes 22 are opened at the side ends of the universal ball ring inner ring 2. A universal ball ring outer ring 23 is arranged on the outer side of the universal ball ring inner ring 2. A fixing retaining ring 24 is arranged on the outer side of each of the pin shafts frames 12. A number of threaded pins 25 are threadedly installed on the fixing retaining ring 24. Among them, each threaded pin 25 is threadedly installed with the corresponding fixing threaded hole 22. Each limit tooth 15 is arranged inside the clearance ring groove 21. The spline 11 is connected to the rotating shaft. Then, the angle between the pin shafts frame 12 and the universal ball ring inner ring 2 is adjusted as required. Since the pin shafts frame 12 and the universal ball ring inner ring 2 are in transitional fit, when the working swing angle of the pin shafts frame 12 and the universal ball ring inner ring 2 is adjusted within a limited range, the pin shafts frame 12 can always form a transitional match with the universal ball ring inner ring 2 until the required angular position is reached. At the same time, when the universal ball ring inner ring 2 drives the universal ball ring outer ring 23 to deflect in angle, the limit teeth 15 on the limit retaining ring 14 sleeved on the outer side of the pin shafts frame 12 deflect in angle inside the clearance ring groove 21. Since there is a deflection space inside the clearance ring groove 21, when the universal ball ring inner ring 2 deflects, the limit teeth 15 are placed inside the clearance ring groove 21. The limit ring groove 13 arranged on the pin shafts frame 12, the limit retaining ring 14 arranged in the limit ring groove 13, the limit teeth 15 arranged on the limit retaining ring 14, and the clearance ring groove 21 on the universal ball ring inner ring 2 are in clearance fit, so that during the process of adjusting the angle between the pin shafts frame 12 and the universal ball ring inner ring 2, the universal ball ring inner ring 2 and the universal ball ring outer ring 23 can be effectively prevented from falling off.

[0024] The pin shaft frame 12 is drum-shaped. There is a transition gap between the fixed retaining ring 24 and the curved neck of the pin shaft frame 12, and the gap is smaller than the drum-shaped pin shaft of the pin shaft frame 12. The length of the diagonal line of the longitudinal section of the pin shaft frame 12 is less than or equal to the length of the cross-sectional diameter at the geometric center of the pin shaft frame 12. The overall shape of the outer ring 23 of the universal ball ring is drum-shaped. The inner ring 2 of the universal ball ring is in transitional fit with the pin shaft frame 12. The connection between the pin shaft frame 12 and the three-pin ring frame 1 is an inward concave arc transition, and the curvature of the inward concave arc transition at the connection is smaller than the curvature of the side surface of the pin shaft frame 12. Due to the fixed retaining ring 24 provided on one side of the pin shaft frame 12, and the fixed retaining ring 24 and the inner ring 2 of the universal ball ring are fixedly connected by a threaded pin 25. At the same time, there is a transition gap between the fixed retaining ring 24 and the curved neck of the pin shaft frame 12, and the gap is smaller than the drum-shaped pin shaft of the pin shaft frame 12. When the inner ring 2 of the universal ball ring completes the swing angle, the fixed retaining ring 24 can effectively limit the inner ring 2 of the universal ball ring and the outer ring 23 of the universal ball ring outside the pin shaft frame 12, preventing the inner ring 2 of the universal ball ring and the outer ring 23 of the universal ball ring from falling off.

[0025] Working principle:

[0026] First step, when the three-ball pin universal joint with a ball ring anti-drop structure is in use, the spline 11 is connected to the rotating shaft, and then the angle between the pin shaft frame 12 and the inner ring 2 of the universal ball ring is adjusted as required. Since the pin shaft frame 12 and the inner ring 2 of the universal ball ring are in transitional fit, when the pin shaft frame 12 and the inner ring 2 of the universal ball ring adjust the working swing angle within the limited range, the pin shaft frame 12 can always form a transitional match with the inner ring 2 of the universal ball ring until the required angle position is reached. At the same time, when the inner ring 2 of the universal ball ring drives the outer ring 23 of the universal ball ring to deflect at an angle, the limiting teeth 15 on the limiting retaining ring 14 sleeved outside the pin shaft frame 12 deflect at an angle within the clearance ring groove 21. Since there is a deflection space within the clearance ring groove 21, when the inner ring 2 of the universal ball ring deflects, the limiting teeth 15 are placed within the clearance ring groove 21. The limiting ring groove 13 provided on the pin shaft frame 12, the limiting retaining ring 14 provided within the limiting ring groove 13, the limiting teeth 15 provided on the limiting retaining ring 14, and the clearance ring groove 21 on the inner ring 2 of the universal ball ring are in clearance fit, so that during the process of adjusting the angle between the pin shaft frame 12 and the inner ring 2 of the universal ball ring, the inner ring 2 of the universal ball ring and the outer ring 23 of the universal ball ring can be effectively prevented from falling off. By designing and installing the limiting retaining ring 14 on the three-ball pin universal joint with a ball ring anti-drop structure, during the use of the universal joint, the limiting ring groove 13, the limiting retaining ring 14, the limiting teeth 15 and the clearance ring groove 21 are in clearance fit, thereby preventing the inner ring 2 of the universal ball ring and the outer ring 23 of the universal ball ring from falling off, effectively improving the practicability of the device.

[0027] Step 2: When the three-ball pin universal joint with a ball ring anti-disengagement structure is in use, when adjusting the working swing angle between the pin shaft frame 12 and the inner ring 2 of the universal ball ring within a limited range, the pin shaft frame 12 can always form a transitional fit with the inner ring 2 of the universal ball ring until the required angular position is reached. Due to the fixed retaining ring 24 provided on one side of the pin shaft frame 12, and the fixed retaining ring 24 is fixedly connected to the inner ring 2 of the universal ball ring by a threaded pin 25. At the same time, there is a transitional gap between the fixed retaining ring 24 and the curved neck of the pin shaft frame 12, and the gap is smaller than the drum-shaped pin shaft of the pin shaft frame 12. When the inner ring 2 of the universal ball ring completes the swing angle, the fixed retaining ring 24 can effectively limit the inner ring 2 of the universal ball ring and the outer ring 23 of the universal ball ring outside the pin shaft frame 12, preventing the inner ring 2 of the universal ball ring and the outer ring 23 of the universal ball ring from falling off. By designing and adding the fixed retaining ring 24 to the three-ball pin universal joint with a ball ring anti-disengagement structure, during the use of the universal joint, the fixed retaining ring 24 cooperates with the threaded pin 25 to limit the fixed retaining ring 24, thereby preventing the inner ring 2 of the universal ball ring and the outer ring 23 of the universal ball ring from falling off. On the basis of the first-layer anti-disengagement design of the limit retaining ring 14, it plays a dual protection role and effectively improves the practicability of the device.

[0028] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly illustrating the present invention, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A three-ball pin universal joint with a ball-ring anti-disengagement structure, comprising a three-pin ring frame (1), wherein a spline (11) is arranged inside the three-pin ring frame (1), and it is characterized in that, Three pin shafts frames (1) are evenly arranged on the three-pin ring frame, and a limit ring groove (13) is arranged on each of the pin shafts frames (12). A limit retaining ring (14) is arranged in each of the limit ring grooves (13), and a number of limit teeth (15) are arranged on the limit retaining ring (14). A universal ball ring inner ring (2) is sleeved on the outer side of each of the pin shafts frames (12). A clearance ring groove (21) is arranged on the inner side of each of the universal ball ring inner rings (2). A number of fixed threaded holes (22) are formed in the side ends of each of the universal ball ring inner rings (2). A universal ball ring outer ring (23) is arranged on the outer side of the universal ball ring inner ring (2). A fixed retaining ring (24) is arranged on the outer side of each of the pin shafts frames (12), and a number of threaded pins (25) are threadedly installed on the fixed retaining ring (24); Among them, each of the threaded pins (25) is threadedly installed in the corresponding fixed threaded hole (22), and each of the limit teeth (15) is arranged inside the clearance ring groove (21).

2. The three-ball pin universal joint with a ball-ring anti-disengagement structure according to claim 1, characterized in that, The pin shafts frame (12) is drum-shaped, and a transition gap is left between the fixed retaining ring (24) and the curved neck of the pin shafts frame (12), and the gap is smaller than the drum-shaped pin shaft of the pin shafts frame (12).

3. The three-ball pin universal joint with a ball-ring anti-disengagement structure according to claim 2, characterized in that, The length of the diagonal line of the longitudinal section of the pin shafts frame (12) is less than or equal to the length of the cross-sectional diameter at the geometric center of the pin shafts frame (12).

4. The three-ball pin universal joint with a ball-ring anti-disengagement structure according to claim 3, characterized in that, The whole of the universal ball ring outer ring (23) is drum-shaped.

5. A three-ball pin universal joint with a ball-ring anti-disengagement structure according to claim 4, characterized in that, The universal ball ring inner ring (2) and the pin shafts frame (12) are in transitional fit.

6. The three-ball pin universal joint with a ball-ring anti-disengagement structure according to claim 5, wherein, The connection between the pin shafts frame (12) and the three-pin ring frame (1) is an inwardly concave arc transition, and the curvature of the inwardly concave arc transition at the connection is smaller than the curvature of the side of the pin shafts frame (12).

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