Automobile universal joint transmission corner testing equipment

Abstract

The present application relates to the technical field of testing equipment, in particular to a kind of automobile universal joint transmission corner testing equipment, including universal joint body, the universal joint body keeps vertical state, the two ends of the universal joint body are provided with the clamping structure for fixing universal joint body, clamping structure is made of two right-angle clamps, the end of universal joint body is clamped and fixed by two right-angle clamps, support shaft is provided on clamping structure;Through dynamic transmission corner testing work to universal joint body, the accuracy of universal joint body test value can be effectively improved, the detection error is reduced, the performance of universal joint body is conveniently accurately evaluated, simultaneously, through automatic detection to universal joint body, the operation error when manually detecting can be effectively reduced, test precision is improved, and manpower is saved.

Description

Technical Field

[0001] This invention relates to the technical field of testing equipment, and in particular to a testing device for the rotation angle of an automotive universal joint transmission. Background Technology

[0002] As is well known, in automotive transmission systems, universal joints are auxiliary couplings that steer the output speed and torque of the drive shaft. They are mainly composed of a cross shaft, a fork, and a connecting shaft. After assembly, universal joints need to be tested for characteristics such as torsional strength, fatigue strength, hardness, starting torque, fixed end / sliding end swing torque, swing angle, and transmission angle, so as to accurately evaluate the manufacturing and assembly quality of the universal joint.

[0003] Currently, domestic manufacturers still rely on manual testing to assess the rotation angle of universal joints. Workers rotate the two forks on the universal joint to the maximum angle allowed for normal operation, then measure the angle between the two forks using an angle gauge. However, this method only allows for static testing and cannot measure the rotation angle under stable operation. Due to the significant inertia of the universal joint during rotation, there is a large difference between static and dynamic measurements, resulting in substantial testing errors and an inability to accurately assess universal joint performance. Furthermore, manual testing has low accuracy and consumes a large amount of manpower. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a test device for the transmission angle of an automotive universal joint.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] An automotive universal joint transmission angle testing device includes a universal joint body, which is kept vertical. Both ends of the universal joint body are provided with clamping structures for fixing the universal joint body. The clamping structure consists of two right-angle clamps, which clamp and fix the ends of the universal joint body. A support shaft is provided on the clamping structure. The bottom of the support shaft located on the lower side of the universal joint body is provided with a base plate that supports the universal joint body, and the support shaft is rotatably connected to the base plate. An arc-shaped slider is rotatably provided on the top of the support shaft located on the upper side of the universal joint body.

[0007] An arc-shaped guide rail is provided on the outer side of the universal joint body, and an arc-shaped slider is slidably mounted on the arc-shaped guide rail, with the arc-shaped guide rail guiding the arc-shaped slider.

[0008] The center of the arc-shaped guide rail coincides with the center point of the universal joint body.

[0009] Furthermore, an external gear ring is rotatably mounted on the top of the base plate, a pressure gauge is mounted on the inner wall of the external gear ring, a torsion spring is mounted on the pressure gauge, and the outer end of the torsion spring is fixed to the support shaft on the base plate. The pressure gauge and the torsion spring cause the external gear ring to drive the support shaft to rotate, thereby driving the universal joint body to rotate. A first gear is meshed on the external gear ring, and a main motor is mounted on the bottom of the base plate. The main motor is connected to the first gear in a transmission connection.

[0010] Two connecting plates are installed on the base plate, and the two connecting plates are respectively connected to the two ends of the arc-shaped guide rail.

[0011] Furthermore, an arc-shaped toothed rack is fixed on the outer wall of the arc-shaped guide rail, a second gear is meshed on the arc-shaped toothed rack, a servo motor is mounted on the arc-shaped slider, and the output end of the servo motor is connected to the second gear.

[0012] Furthermore, the support shaft consists of a polygonal connecting shaft and an inner polygonal sliding sleeve. The polygonal connecting shaft is fixed on the clamping structure, and the inner polygonal sliding sleeve is slidably sleeved on the outer wall of the polygonal connecting shaft. The polygonal connecting shaft and the inner polygonal sliding sleeve are fixedly connected by locking bolts. The outer end of the inner polygonal sliding sleeve on the upper side of the universal joint body is rotatably mounted on the arc-shaped slider, and the outer end of the inner polygonal sliding sleeve on the lower side of the universal joint body is rotatably mounted on the base plate. The end of the torsion spring is connected to the outer wall of the inner polygonal sliding sleeve on the base plate.

[0013] Furthermore, the universal joint body consists of a cross shaft, two forks, and two connecting shafts. The two forks are respectively installed on the upper and lower sides of the cross shaft, and the two forks are oriented in opposite directions. The two connecting shafts are respectively fixed to the outer walls of the two forks.

[0014] The clamping structure also includes two curved clamping plates located between two right-angle clamping plates. The two curved clamping plates and the two right-angle clamping plates are arranged in a quadrilateral shape. Both ends of the curved clamping plates are fixed with telescopic rods at an incline, and the fixed ends of the telescopic rods are installed on the right-angle clamping plates.

[0015] A support plate is provided between the two right-angle clamps, which is used to support the outer end of the connecting shaft.

[0016] Furthermore, the clamping structure also includes a slotted plate, which is connected to a polygonal connecting shaft. Both right-angled clamping plates are located inside the slotted plate. Guide groups are provided on the inner sidewalls of the slotted plate on both the front and rear sides of the right-angled clamping plates. The guide groups consist of two right-angled guide grooves, one right-angled side of which is horizontal and the other right-angled side is vertical. Two sliding rods are fixed on each sidewall of the front and rear of the right-angled clamping plates. The line connecting the two sliding rods is inclined, and the outer ends of the sliding rods are slidably installed in the right-angled guide grooves.

[0017] Furthermore, two first push-pull plates are rotatably and inclinedly arranged on the end face of the support plate away from the universal joint body. The two first push-pull plates are tilted in opposite directions. A second push-pull plate is rotatably and inclinedly arranged on the outer end of the first push-pull plate. The outer end of the second push-pull plate is rotatably mounted on the right-angle clamp.

[0018] Furthermore, a sliding groove is provided in the groove plate, and two push sliders are slidably arranged in the sliding groove. Two second push-pull plates are respectively rotatably mounted on the two push sliders. Threaded rods are screwed through the push sliders, and the two threaded rods are connected together with opposite helical directions. An auxiliary motor is installed on the inner side wall of the sliding groove, and the output end of the auxiliary motor is connected to the end of the threaded rod near the auxiliary motor.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: by performing dynamic transmission angle testing on the universal joint body, the accuracy of the universal joint body test values ​​can be effectively improved, the detection error can be reduced, and the performance of the universal joint body can be accurately evaluated. At the same time, by automatically detecting the universal joint body, the operational error during manual detection can be effectively reduced, the test accuracy can be improved, and manpower can be saved. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the front structure of the present invention;

[0022] Figure 2 yes Figure 1 Enlarged top view of the midsole plate structure;

[0023] Figure 3 yes Figure 1 A magnified view of the structure at point A in the middle;

[0024] Figure 4 yes Figure 1 Enlarged structural diagram of the universal joint body and clamping structure;

[0025] Figure 5 yes Figure 4 Enlarged structural diagram of the central universal joint body;

[0026] Figure 6 yes Figure 4 Enlarged cross-sectional view of the middle channel plate;

[0027] Figure 7yes Figure 4 A top-view enlarged structural diagram of the middle channel plate;

[0028] The following components are labeled in the attached diagram: 1. Universal joint body; 2. Right-angle clamping plate; 3. Support shaft; 4. Base plate; 5. Arc-shaped slider; 6. Arc-shaped guide rail; 7. External gear ring; 8. Pressure gauge; 9. Torsion spring; 10. First gear; 11. Main motor; 12. Arc-shaped gear row; 13. Second gear; 14. Servo motor; 15. Polygonal connecting shaft; 16. Inner polygonal sliding sleeve; 17. Locking bolt; 18. Cross shaft; 19. Joint fork; 20. Connecting shaft; 21. Arc-shaped clamping plate; 22. Telescopic rod; 23. Support plate; 24. Groove plate; 25. Right-angle guide groove; 26. Slide rod; 27. First push-pull plate; 28. Second push-pull plate; 29. ​​Slide groove; 30. Push slider; 31. Auxiliary motor; 32. Threaded rod; 33. Connecting plate. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] In the description of this invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this invention and 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.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. This embodiment is written in a progressive manner.

[0032] like Figure 1As shown, an automotive universal joint transmission angle testing device of the present invention includes a universal joint body 1, which is kept in a vertical state. Both ends of the universal joint body 1 are provided with clamping structures for fixing the universal joint body 1. The clamping structure is composed of two right-angle clamping plates 2, which clamp and fix the ends of the universal joint body 1. A support shaft 3 is provided on the clamping structure. The bottom of the support shaft 3 located on the lower side of the universal joint body 1 is provided with a base plate 4 for supporting the universal joint body 1, and the support shaft 3 is rotatably connected to the base plate 4. An arc-shaped slider 5 is rotatably provided on the top of the support shaft 3 located on the upper side of the universal joint body 1.

[0033] An arc-shaped guide rail 6 is provided on the outer side of the universal joint body 1, and an arc-shaped slider 5 is slidably mounted on the arc-shaped guide rail 6, with the arc-shaped guide rail 6 guiding the arc-shaped slider 5.

[0034] The center of the arc-shaped guide rail 6 coincides with the center point of the universal joint body 1.

[0035] In this embodiment, the support shaft 3 on the rotating base plate 4 drives the universal joint body 1 to rotate through the two right-angle clamping plates 2 on the clamping structure, thereby putting the universal joint body 1 in a rotating state. The universal joint body 1 drives the upper clamping structure and the support shaft 3 to rotate, and the support shaft 3 rotates on the arc-shaped slider 5, pushing the arc-shaped slider 5 to slide on the arc-shaped guide rail 6. Since the center of the arc-shaped guide rail 6 coincides with the center point of the universal joint body 1, the arc-shaped slider 5 drives the universal joint body 1 to perform bending deformation motion, and the transmission angle of the universal joint body 1 changes, realizing the purpose of angular transmission of the universal joint body 1. As the arc-shaped slider 5 continues to slide, the bending angle of the universal joint body 1 gradually increases. When the universal joint body 1 undergoes bending deformation... When the universal joint body 1 cannot rotate due to mutual inertia or excessive rotational torque, the sliding arc-shaped slider 5 stops. At this time, the angle between the position of the arc-shaped slider 5 on the arc-shaped guide rail 6 and the vertical plane perpendicular to the arc-shaped guide rail 6 is the maximum test angle of the transmission angle of the universal joint body 1. The dynamic angle test of the universal joint body 1 is completed. By conducting dynamic transmission angle tests on the universal joint body 1, the accuracy of the test values ​​of the universal joint body 1 can be effectively improved, the detection error can be reduced, and the performance of the universal joint body 1 can be accurately evaluated. At the same time, by automatically detecting the universal joint body 1, the operational error during manual detection can be effectively reduced, the test accuracy can be improved, and manpower can be saved.

[0036] like Figure 1 and Figure 2As shown, in a preferred embodiment, an external gear ring 7 is rotatably provided on the top of the base plate 4, a pressure gauge 8 is provided on the inner wall of the external gear ring 7, a torsion spring 9 is provided on the pressure gauge 8, and the outer end of the torsion spring 9 is fixed on the support shaft 3 on the base plate 4. The external gear ring 7 drives the support shaft 3 to rotate through the pressure gauge 8 and the torsion spring 9, thereby driving the universal joint body 1 to rotate. A first gear 10 is meshed on the external gear ring 7, and a main motor 11 is provided at the bottom of the base plate 4. The main motor 11 is connected to the first gear 10 in a transmission.

[0037] Two connecting plates 33 are provided on the base plate 4, and the two connecting plates 33 are respectively connected to the two ends of the arc-shaped guide rail 6.

[0038] In this embodiment, the main motor 11 drives the external gear ring 7 to rotate through the first gear 10. The external gear ring 7 drives the universal joint body 1 to rotate through the pressure gauge 8 and the torsion spring 9, thereby facilitating dynamic detection of the universal joint body 1. The pressure gauge 8 and the torsion spring 9 can achieve the purpose of soft transmission of the external gear ring 7 to the universal joint body 1. The pressure gauge 8 detects the elastic force of the torsion spring 9 in real time. When the universal joint body 1 is unable to rotate normally due to mutual restraint or when the transmission torque of the universal joint body 1 reaches the specified value, the main motor 11 stops running. At this time, the arc-shaped slider 5 stops moving. By setting the torsion spring 9, it is convenient to protect the external gear ring 7 and the support shaft 3 on the base plate 4, and provide sufficient buffer space for the transmission process of the external gear ring 7 and the support shaft 3. The connecting plate 33 can support the arc-shaped guide rail 6.

[0039] like Figure 3 As shown, in a preferred embodiment, an arc-shaped toothed rack 12 is fixed on the outer wall of the arc-shaped guide rail 6, a second gear 13 is meshed on the arc-shaped toothed rack 12, a servo motor 14 is mounted on the arc-shaped slider 5, and the output end of the servo motor 14 is connected to the second gear 13.

[0040] In this embodiment, when the universal joint body 1 is rotating, the servo motor 14 drives the second gear 13 to rotate. The second gear 13 rolls on the arc-shaped gear rack 12, thereby pushing the arc-shaped slider 5 to slide on the arc-shaped guide rail 6. At this time, the arc-shaped slider 5 can drive the universal joint body 1 to bend and deform, thereby achieving the purpose of rotational transmission of the universal joint body 1. When the main motor 11 stops running, the universal joint body 1 stops rotating. At this time, the servo motor 14 stops running synchronously. By detecting the number of rotor rotations and the rotor rotation angle inside the servo motor 14, the position of the arc-shaped slider 5 on the arc-shaped guide rail 6 can be detected, which facilitates the automatic detection of the transmission angle of the universal joint body 1.

[0041] like Figure 3As shown, in a preferred embodiment of the above, the support shaft 3 consists of a polygonal connecting shaft 15 and an inner polygonal sliding sleeve 16. The polygonal connecting shaft 15 is fixed on the clamping structure, and the inner polygonal sliding sleeve 16 is slidably sleeved on the outer wall of the polygonal connecting shaft 15. The polygonal connecting shaft 15 and the inner polygonal sliding sleeve 16 are fixedly connected by a locking bolt 17. The outer end of the inner polygonal sliding sleeve 16 on the upper side of the universal joint body 1 is rotatably mounted on the arc-shaped slider 5, and the outer end of the inner polygonal sliding sleeve 16 on the lower side of the universal joint body 1 is rotatably mounted on the base plate 4. The end of the torsion spring 9 is connected to the outer wall of the inner polygonal sliding sleeve 16 on the base plate 4.

[0042] In this embodiment, loosening the locking bolt 17 allows for adjustment of the total length of the polygonal connecting shaft 15 and the inner polygonal sliding sleeve 16, thereby facilitating the fixing of the universal joint body 1 of any specification onto the testing equipment for testing. It also facilitates the alignment of the center point of the universal joint body 1 with the center of the arc-shaped guide rail 6, thus enabling the universal joint body 1 to smoothly perform bending angle tests while rotating.

[0043] like Figures 4 to 6 As shown, as a preferred embodiment of the above, the universal joint body 1 is composed of a cross shaft 18, two forks 19 and two connecting shafts 20. The two forks 19 are respectively installed on the upper and lower sides of the cross shaft 18, and the two forks 19 are oriented opposite to each other. The two connecting shafts 20 are respectively fixed on the outer walls of the two forks 19.

[0044] The clamping structure also includes two arc-shaped clamps 21 located between two right-angle clamps 2. The two arc-shaped clamps 21 and the two right-angle clamps 2 are arranged in a quadrilateral shape. Both ends of the arc-shaped clamps 21 are inclinedly fixed with telescopic rods 22, and the fixed ends of the telescopic rods 22 are installed on the right-angle clamps 2.

[0045] A support plate 23 is provided between the two right-angle clamps 2, which is used to support the outer end of the connecting shaft 20.

[0046] In this embodiment, when the two right-angle clamps 2 approach each other, the two right-angle clamps 2 are pushed by the two telescopic rods 22 on the arc-shaped clamps 21 to move synchronously, and the two arc-shaped clamps 21 approach each other synchronously. This causes the two right-angle clamps 2 and the two arc-shaped clamps 21 to approach each other synchronously. When it is necessary to fix the universal joint body 1, the outer end of the connecting shaft 20 is placed on the support plate 23. The support plate 23 supports the connecting shaft 20, pushing the two right-angle clamps 2 closer together. The vertical sidewalls of the two right-angle clamps 2 press and fix the left and right sidewalls of the joint fork 19. Simultaneously, the two arc-shaped clamps... Plate 21 presses and fixes the outer wall of the connecting shaft 20 on both the front and rear sides, thereby pressing and fixing the fork 19 and the connecting shaft 20 in the front, back, left and right directions. The two right-angled clamps 2 and the two arc-shaped clamps 21 push the fork 19 and the connecting shaft 20 to move outward. The horizontal right-angled edges of the right-angled clamps 2 press and push the fork 19, thereby pushing the connecting shaft 20 to fit tightly against the support plate 23. This achieves the pressing and fixing of the fork 19 and the connecting shaft 20 in the upper and lower directions, thus fixing the fork 19 and the connecting shaft 20 in all directions.

[0047] In this embodiment, by setting the telescopic rod 22, the curved clamping plate 21 can be easily guided, so that the curved clamping plate 21 and the right-angle clamping plate 2 can move synchronously.

[0048] like Figure 6 and Figure 7 As shown, as a preferred embodiment of the above, the clamping structure further includes a slotted plate 24, which is connected to a polygonal connecting shaft 15. Both right-angled clamping plates 2 are located inside the slotted plate 24. Guide groups are provided on the inner sidewalls of the slotted plate 24 on both the front and rear sides of the right-angled clamping plate 2. The guide groups are composed of two right-angled guide grooves 25. One right-angled side of the right-angled guide groove 25 is horizontal and the other right-angled side is vertical. Two sliding rods 26 are fixed on each sidewall of the front and rear of the right-angled clamping plate 2. The line connecting the two sliding rods 26 is inclined. The outer ends of the sliding rods 26 are slidably installed in the right-angled guide grooves 25.

[0049] In this embodiment, by setting two right-angle guide grooves 25 and two sliding rods 26, the right-angle clamping plate 2 can be guided, making it easy for the right-angle clamping plate 2 to maintain a translational state during movement. When it is necessary to clamp the fork 19, the sliding rod 26 slides in the horizontal area of ​​the right-angle guide groove 25, and the two right-angle clamping plates 2 move closer to each other simultaneously. The vertical sidewall of the right-angle clamping plate 2 presses and fixes the outer sidewall of the fork 19. When the right-angle clamping plate 2 contacts the fork 19, the sliding rod 26 moves to the corner position of the right-angle guide groove 25 and enters the vertical area of ​​the right-angle guide groove 25. The two sliding rods 26 move synchronously and slide relative to the fork 19. The horizontal right-angle side of the sliding rod 26 contacts the inner wall of the fork 19 and pushes the connecting shaft 20 to stick to the support plate 23, thereby realizing the fixing of the fork 19 and the connecting shaft 20.

[0050] In this embodiment, by setting the right-angle guide groove 25 and the slide bar 26, the right-angle clamp 2 can be easily guided, and the right-angle clamp 2 can first squeeze and fix the side wall of the fork 19 and then push and fix the inner wall of the fork 19.

[0051] like Figure 6 As shown, in a preferred embodiment, two first push-pull plates 27 are rotatably disposed on the end face of the support plate 23 away from the universal joint body 1. The two first push-pull plates 27 are tilted in opposite directions. A second push-pull plate 28 is rotatably disposed on the outer end of the first push-pull plate 27. The outer end of the second push-pull plate 28 is rotatably mounted on the right-angle clamp 2.

[0052] In this embodiment, the two second push-pull plates 28 are pushed to separate synchronously. Due to the inclination of the second push-pull plates 28, the two second push-pull plates 28 respectively push the two right-angle clamping plates 2 to move synchronously, and the right-angle clamping plates 2 move along the direction of the right-angle guide groove 25, so that the two right-angle clamping plates 2 gradually separate and stop fixing the fork 19. At the same time, the two second push-pull plates 28 pull the support plate 23 away from the connecting shaft 20 through the two first push-pull plates 27, so that the support plate 23 stops pressing and supporting the connecting shaft 20. By adopting the structure of the first push-pull plates 27 and the second push-pull plates 28, the synchronous movement of the support plate 23 and the right-angle clamping plates 2 can be achieved, realizing the linkage movement state of the two right-angle clamping plates 2, the two arc-shaped clamping plates 21 and the support plate 23. Compared with the transmission cylinder pushing clamping structure, the present invention can realize multi-directional synchronous pressing and fixing work by adopting a linkage structure, improving the synchronization of clamping work, and greatly saving the number of power structures such as cylinders, simplifying the structure, and reducing the complexity of pipeline and line distribution.

[0053] like Figure 6As shown, in a preferred embodiment, the groove plate 24 is provided with a sliding groove 29, and two push sliders 30 are slidably arranged in the sliding groove 29. Two second push-pull plates 28 are respectively rotatably mounted on the two push sliders 30. Threaded rods 32 are screwed through the push sliders 30. The two threaded rods 32 are connected together, and the helical directions of the two threaded rods 32 are opposite. An auxiliary motor 31 is installed on the inner side wall of the sliding groove 29, and the output end of the auxiliary motor 31 is connected to the end of the threaded rod 32 near the auxiliary motor 31.

[0054] In this embodiment, the auxiliary motor 31 drives the two threaded rods 32 to rotate synchronously, and the two threaded rods 32 synchronously push the two push sliders 30 to move relative to each other, thereby driving the two second push-pull plates 28 to move synchronously.

[0055] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for testing the rotation angle of an automotive universal joint transmission, characterized in that, Includes a universal joint body (1), which is kept vertical. Both ends of the universal joint body (1) are provided with clamping structures for fixing the universal joint body (1). The clamping structure consists of two right-angle clamps (2). The ends of the universal joint body (1) are clamped and fixed by the two right-angle clamps (2). A support shaft (3) is provided on the clamping structure. The bottom of the support shaft (3) located on the lower side of the universal joint body (1) is provided with a base plate (4) for supporting the universal joint body (1). The support shaft (3) is rotatably connected to the base plate (4). An arc-shaped slider (5) is rotatably provided on the top of the support shaft (3) located on the upper side of the universal joint body (1). An arc-shaped guide rail (6) is provided on the outer side of the universal joint body (1), and an arc-shaped slider (5) is slidably mounted on the arc-shaped guide rail (6) and the arc-shaped guide rail (6) guides the arc-shaped slider (5); Among them, the center of the arc-shaped guide rail (6) coincides with the center point of the universal joint body (1); The top of the base plate (4) is rotatably provided with an external gear ring (7), and a pressure gauge (8) is provided on the inner wall of the external gear ring (7). A torsion spring (9) is provided on the pressure gauge (8). The outer end of the torsion spring (9) is fixed on the support shaft (3) on the base plate (4). The external gear ring (7) drives the support shaft (3) to rotate through the pressure gauge (8) and the torsion spring (9), thereby driving the universal joint body (1) to rotate. A first gear (10) is meshed on the external gear ring (7). A main motor (11) is provided at the bottom of the base plate (4). The main motor (11) is connected to the first gear (10) in a transmission connection. Two connecting plates (33) are provided on the base plate (4), and the two connecting plates (33) are respectively connected to the two ends of the arc-shaped guide rail (6).

2. The automotive universal joint transmission angle testing device according to claim 1, characterized in that, An arc-shaped toothed rack (12) is fixed on the outer wall of the arc-shaped guide rail (6). A second gear (13) is meshed on the arc-shaped toothed rack (12). A servo motor (14) is installed on the arc-shaped slider (5). The output end of the servo motor (14) is connected to the second gear (13).

3. The automotive universal joint transmission angle testing device according to claim 2, characterized in that, The support shaft (3) consists of a polygonal connecting shaft (15) and an inner polygonal sliding sleeve (16). The polygonal connecting shaft (15) is fixed on the clamping structure. The inner polygonal sliding sleeve (16) is slidably sleeved on the outer wall of the polygonal connecting shaft (15). The polygonal connecting shaft (15) and the inner polygonal sliding sleeve (16) are fixedly connected by a locking bolt (17). The outer end of the inner polygonal sliding sleeve (16) on the upper side of the universal joint body (1) is rotatably mounted on the arc-shaped slider (5). The outer end of the inner polygonal sliding sleeve (16) on the lower side of the universal joint body (1) is rotatably mounted on the base plate (4). The end of the torsion spring (9) is connected to the outer wall of the inner polygonal sliding sleeve (16) on the base plate (4).

4. The automotive universal joint transmission angle testing device according to claim 3, characterized in that, The universal joint body (1) consists of a cross shaft (18), two forks (19) and two connecting shafts (20). The two forks (19) are respectively installed on the upper and lower sides of the cross shaft (18) and the two forks (19) are facing each other. The two connecting shafts (20) are respectively fixed on the outer wall of the two forks (19). The clamping structure also includes two arc-shaped clamps (21) located between two right-angle clamps (2). The two arc-shaped clamps (21) and the two right-angle clamps (2) are arranged in a quadrilateral shape. Both ends of the arc-shaped clamps (21) are fixed with telescopic rods (22), and the fixed ends of the telescopic rods (22) are installed on the right-angle clamps (2). A support plate (23) is provided between the two right-angle clamps (2), and the support plate (23) is used to support the outer end of the connecting shaft (20).

5. The automotive universal joint transmission angle testing device according to claim 4, characterized in that, The clamping structure also includes a slotted plate (24), which is connected to a polygonal connecting shaft (15). Both right-angled clamps (2) are located inside the slotted plate (24). Guide groups are provided on the inner sidewalls of the slotted plate (24) on both the front and rear sides of the right-angled clamp (2). The guide groups consist of two right-angled guide grooves (25). One right-angled side of the right-angled guide groove (25) is horizontal and the other right-angled side is vertical. Two sliding rods (26) are fixed on each sidewall of the front and rear of the right-angled clamp (2). The line connecting the two sliding rods (26) is inclined. The outer end of the sliding rod (26) is slidably installed in the right-angled guide groove (25).

6. The automotive universal joint transmission angle testing device according to claim 5, characterized in that, Two first push-pull plates (27) are rotatably disposed on the end face of the pallet (23) away from the universal joint body (1). The two first push-pull plates (27) are tilted in opposite directions. A second push-pull plate (28) is rotatably disposed on the outer end of the first push-pull plate (27). The outer end of the second push-pull plate (28) is rotatably mounted on the right-angle clamp (2).

7. The automotive universal joint transmission angle testing device according to claim 6, characterized in that, The groove (24) is provided with a sliding groove (29), and two push sliders (30) are slidably arranged in the sliding groove (29). Two second push-pull plates (28) are respectively rotatably installed on the two push sliders (30). A threaded rod (32) is screwed through the push slider (30). The two threaded rods (32) are connected together, and the spiral directions of the two threaded rods (32) are opposite. An auxiliary motor (31) is installed on the inner side wall of the sliding groove (29). The output end of the auxiliary motor (31) is connected to the end of the threaded rod (32) near the auxiliary motor (31).

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