A combined assembly device for an automotive universal joint

Abstract

The present invention belongs to the technical field of assembly devices, and specifically refers to a combined assembly device for an automotive universal joint, including an automatic feeding snap ring installation mechanism, a two-way clamping assembly mechanism, a universal joint clamping mechanism, and a settlement avoidance support assembly. The automatic feeding snap ring installation mechanism is arranged below the two-way clamping assembly mechanism. The two-way clamping assembly mechanism is arranged on the settlement avoidance support assembly, and the universal joint clamping mechanism is arranged on the settlement avoidance support assembly. The present invention proposes an automatic feeding snap ring installation mechanism. On the one hand, the lifting action that the special-shaped pressing bracket itself should have when installing the C-shaped snap ring is used as the control condition for the feeding of the C-shaped snap ring. The propulsion bottom plate is temporarily adsorbed through the magnetic snap ring groove, and its rotation is restricted by the elastic edge stop rod.

Description

Technical Field

[0001] The present invention belongs to the technical field of assembly devices, and specifically refers to a combined assembly device for automotive universal joints. Background Art

[0002] A universal joint is a transmission component used in automobiles, mainly composed of a cross shaft and a constant velocity joint housing. In many cases, the center of the cross shaft is also designed as a sphere. Although the structure of the universal joint is not complex, the installation and assembly steps are relatively cumbersome and the installation difficulty is relatively high. There are still many problems in automatically completing its assembly through mechanical equipment.

[0003] First: A large number of C-shaped retaining rings used to fix the mounting bushing are consumed, and the overall shape is circular (easy to rotate in the fixture), but the opening direction needs to be restricted (it cannot be allowed to rotate freely in the fixture). It is necessary to ensure the continuity of the C-shaped retaining ring feeding and adjust and restrict its opening direction, which generally requires control by multiple axial and relatively complex mechanisms.

[0004] Second: The cross shaft ball core needs to be supported by a bracket in the initial state, but when it needs to rotate, the bracket that originally supports the cross shaft ball core will block its rotation.

[0005] For detailed operations similar to the above, generally complex mechanisms and control systems are required to achieve. The primary task for truly popularizing automated assembly is to simplify the above mechanisms and improve the practicality and promotion value of the technical solution through relatively simple and ingenious designs. Summary of the Invention

[0006] In view of the above situation, to overcome the defects of the prior art, the present invention proposes a combined assembly device for automotive universal joints with a simple and stable structure. To achieve stable feeding of the C-shaped retaining ring, the present invention creatively proposes an automatic feeding and retaining ring installation mechanism. On the one hand, the lifting action that the special-shaped pressing bracket itself should have when installing the C-shaped retaining ring is used as the control condition for the feeding of the C-shaped retaining ring. The propulsion bottom plate is temporarily adsorbed through a magnetic retaining ring groove, and its rotation is restricted by an elastic edge rod. At the same time, the descent of the special-shaped pressing bracket and the lateral propulsion of the T-shaped push block are both driven by a nut slider. On the one hand, it can simplify the transmission structure and improve stability. More importantly, through a linkage method, stable serialized actions can be achieved and the mutual matching of the movement speeds of each mechanism can be realized only through a clever mechanical structure without setting a position feedback and control module.

[0007] The technical solution adopted by the present invention is as follows: The present invention proposes a combined assembly device for an automotive universal joint, including an automatic feeding snap ring installation mechanism, a two-way clamping assembly mechanism, a universal joint clamping mechanism, and a settlement avoidance support assembly. The automatic feeding snap ring installation mechanism is arranged below the two-way clamping assembly mechanism. The two-way clamping assembly mechanism is arranged on the settlement avoidance support assembly, and the universal joint clamping mechanism is arranged on the settlement avoidance support assembly.

[0008] Further, the automatic feeding snap ring installation mechanism includes an automatic downward pressure transmission component and a snap ring feeding component. The automatic downward pressure transmission component is arranged on the two-way synchronous propulsion component, and the snap ring feeding component is arranged below the two-way synchronous propulsion component.

[0009] Preferably, the automatic downward pressure transmission component includes a horizontally arranged rack, a transmission gear seat, a transmission gear body, and a special-shaped downward pressure bracket. The horizontally arranged rack is fixedly connected to the side surface of the T-shaped push block. The transmission gear seat is fixedly connected to the bottom of the gantry frame. The transmission gear body is rotatably arranged in the transmission gear seat. The transmission gear body and the horizontally arranged rack are meshed and driven. The special-shaped downward pressure bracket passes through the gantry frame and slides up and down. A vertically arranged rack is arranged on the special-shaped downward pressure bracket. The vertically arranged rack and the transmission gear body are meshed and driven. A magnetic snap ring groove is also arranged on the special-shaped downward pressure bracket. Elastic edge stop rods are symmetrically arranged on both sides of the special-shaped downward pressure bracket.

[0010] Through the transmission of the horizontally arranged rack and the transmission gear body, during the horizontal sliding of the T-shaped push block, the special-shaped downward pressure bracket can generate synchronous longitudinal sliding. Through the downward movement of the special-shaped downward pressure bracket, the C-shaped snap ring located in the magnetic snap ring groove can be lowered and stuck in the counterbore, thereby limiting the axial position of the mounting bushing through the C-shaped snap ring, and further completing the assembly and fixation of the universal joint assembly.

[0011] Further, the snap ring feeding component includes a fixed vertical plate, a horizontally arranged slide bar, a horizontally arranged slide plate, and a feeding spring. The fixed vertical plate is fixedly connected to the lower part of the gantry frame. The horizontally arranged slide bar is fixedly connected to the fixed vertical plate. The horizontally arranged slide plate is clamped and slidably arranged on the horizontally arranged slide bar. The feeding spring is arranged between the fixed vertical plate and the horizontally arranged slide plate.

[0012] The feeding spring can make the C-shaped snap ring located on the horizontally arranged slide bar always have a tendency to slide towards the magnetic snap ring groove, so that after the magnetic snap ring groove reaches the specified position, the feeding and position limitation of the C-shaped snap ring can be automatically completed.

[0013] Preferably, the two-way clamping assembly mechanism includes a two-way synchronous propulsion component and a pushing combination component. The two-way synchronous propulsion component is arranged on the main body bottom plate, and the pushing combination components are symmetrically arranged at both ends of the two-way synchronous propulsion component.

[0014] As a further preference of the present invention, the bidirectional synchronous propulsion assembly includes a gantry frame, a lead screw support, a double-threaded lead screw, and a lead screw drive gear. The gantry frame is provided on the main body bottom plate. The lead screw support is provided on the gantry frame. The double-threaded lead screw is rotatably provided in the lead screw support. The lead screw drive gear is fixedly connected to the middle position of the double-threaded lead screw. The double-threaded lead screw is provided with threads in opposite directions on both sides of the lead screw drive gear.

[0015] By driving the double-threaded lead screw to rotate through an external device, the mutual approach and separation of the two T-shaped push blocks can be controlled. When the two T-shaped push blocks approach each other, the assembly of the transmission fork and the mounting bushing, as well as the connection of the mounting bushing and the connecting shaft, can be completed by squeezing the mounting bushing.

[0016] As a further preference of the present invention, the pushing combination assembly includes a pushing slide rod, a T-shaped push block, a nut slider, and a pushing spring. The pushing slide rod is fixedly connected to the bottom of the gantry frame. The T-shaped push block is engaged and slidably provided on the pushing slide rod. The nut slider is engaged and slidably provided in the gantry frame. The nut slider is in threaded transmission with the double-threaded lead screw. When the double-threaded lead screw rotates, the two nut sliders slide synchronously and in opposite directions. A sliding push rod is provided on the nut slider. The sliding push rod is slidably provided in the T-shaped push block. The pushing spring is provided between the end of the sliding push rod and the T-shaped push block.

[0017] The pushing spring can push the T-shaped push block to slide and brace the mounting bushing when the T-shaped push block is not fully limited. After the mounting bushing has been installed, the compression of the pushing spring can also prevent the T-shaped push block from restricting the continued sliding of the nut slider, thereby overcoming the technical contradiction that the nut slider needs to slide but cannot slide.

[0018] Furthermore, the universal joint clamping mechanism includes a universal joint assembly, an axial propulsion assembly, and a rotating assembly. The axial propulsion assembly is provided on the main body bottom plate. The rotating assembly is provided on the axial propulsion assembly. The universal joint assembly is provided on the rotating assembly.

[0019] Preferably, the universal joint assembly includes a cross-axis ball core, a transmission fork, a mounting bushing, and a C-shaped retaining ring. Four groups of support sections and connecting shafts are evenly distributed in a ring shape outside the cross-axis ball core. The tail of the transmission fork is provided with a transmission shaft portion. The transmission fork and the connecting shaft are rotatably connected through the mounting bushing. One end of the mounting bushing is provided with a tail flange. A countersunk head groove is also provided on the mounting bushing. The C-shaped retaining ring is snap-fitted in the countersunk head groove. Clamping bases are provided at both ends of the C-shaped retaining ring.

[0020] The connection between the cross shaft ball core and the transmission fork can be realized by installing a bushing, and the position of the bushing can be axially locked by a C-shaped retaining ring, thus avoiding the embarrassing situation of the bushing slipping out during use. On the other hand, the support section can not only leave a position and space for the contact of the Y-shaped support frame, but also make the installed cross shaft ball core not have obvious axial movement in the transmission fork through the extrusion contact between its own shoulder and the bushing.

[0021] As a further preference of the present invention, the axial propulsion assembly includes a propulsion bottom plate, a propulsion guide rail, a propulsion slider and a propulsion electric cylinder. The propulsion bottom plate is arranged on the main body bottom plate, the propulsion guide rail is arranged on the propulsion bottom plate, the propulsion slider is arranged on the propulsion guide rail, and the fixed end of the propulsion electric cylinder is arranged on the propulsion bottom plate.

[0022] As a further preference of the present invention, the rotation assembly includes a clamping base, a rotating sleeve, a rotating motor and a pinion. The clamping base is arranged on the propulsion slider, the rotating sleeve is rotatably arranged in the clamping base, an external gear one is arranged at one end of the rotating sleeve, the telescopic part of the propulsion electric cylinder is arranged at the bottom of the clamping base, the rotating motor is arranged on the side of the clamping base, the pinion is engaged and arranged on the output shaft of the rotating motor, and the pinion and the external gear one are meshed and driven.

[0023] The axial sliding and horizontal rotation of the transmission fork can be controlled by the axial propulsion assembly and the rotation assembly, thus creating conditions for the automatic assembly of the complex structure of the present invention.

[0024] Furthermore, the settlement and avoidance type support assembly includes a Y-shaped support frame, a sliding check slider, a main body bottom plate and a slider return spring. The Y-shaped support frame is clamped and slidably arranged in the main body bottom plate, a ratchet part is arranged in an array on the Y-shaped support frame, the sliding check slider is slidably arranged on the main body bottom plate, one end of the slider return spring is arranged on the main body bottom plate, and the other end of the slider return spring is arranged on the sliding check slider.

[0025] On the one hand, the Y-shaped support frame can support the position of the cross shaft ball core in the initial state. On the other hand, when pressing and installing the C-shaped retaining ring and the subsequent rotation of the installed transmission fork, the Y-shaped support frame can automatically avoid the position by descending.

[0026] The beneficial effects obtained by the present invention adopting the above structure are as follows:

[0027] (1) Through the transmission of the horizontally arranged rack and the transmission gear body, during the horizontal sliding of the T-shaped push block, the special-shaped downward pressing bracket can generate synchronous longitudinal sliding. Through the descent of the special-shaped downward pressing bracket, the C-shaped retaining ring located in the magnetic retaining ring groove can be lowered and stuck in the countersunk head groove, thereby limiting the axial position of the mounting bushing through the C-shaped retaining ring, and then completing the assembly and fixation of the universal joint assembly.

[0028] (2) Through the feeding spring, the C-shaped retaining ring located on the horizontally arranged sliding rod can always have a tendency to slide towards the magnetic retaining ring groove, so that after the magnetic retaining ring groove reaches the specified position, the feeding and position limitation of the C-shaped retaining ring can be automatically completed.

[0029] (3) By driving the double-threaded lead screw to rotate through an external device, the two T-shaped push blocks can be controlled to approach and move away from each other. When the two T-shaped push blocks approach each other, through the extrusion of the mounting bushing, the assembly of the transmission fork and the mounting bushing, as well as the connection of the mounting bushing and the connecting shaft, can be completed.

[0030] (4) Through the pushing spring, when the T-shaped push block is not fully limited, the T-shaped push block can be pushed to slide to support the mounting bushing; after the mounting bushing has been installed, the compression of the pushing spring can also prevent the T-shaped push block from restricting the continuous sliding of the nut slider; thus overcoming the technical contradiction that the nut slider needs to slide but cannot slide.

[0031] (5) Through the mounting bushing, the connection between the cross-axis ball core and the transmission fork can be realized, and through the C-shaped retaining ring, the axial position of the mounting bushing can be locked, thus avoiding the embarrassing situation of the mounting bushing slipping out during use. On the other hand, the support section can not only leave a position and space for the contact of the Y-shaped support frame, but also through the extrusion contact between its own shoulder and the mounting bushing, so that the installed cross-axis ball core will not have obvious axial movement in the transmission fork.

[0032] (6) Through the axial propulsion component and the rotation component, the axial sliding and horizontal rotation of the transmission fork can be controlled, thus creating conditions for the automatic assembly of the complex structure of the present invention.

[0033] (7) Through the Y-shaped support frame, on the one hand, it can support the position of the cross-axis ball core in the initial state, and on the other hand, when pressing down and installing the C-shaped retaining ring and the subsequent rotation of the installed transmission fork, the Y-shaped support frame can automatically avoid the position by descending. Brief Description of the Drawings

[0034] Figure 1 It is a perspective view of a combined assembly device for an automotive universal joint proposed by the present invention;

[0035] Figure 2The front view of a combined assembly device for an automotive universal joint proposed by the present invention;

[0036] Figure 3 The left view of a combined assembly device for an automotive universal joint proposed by the present invention;

[0037] Figure 4 The top view of a combined assembly device for an automotive universal joint proposed by the present invention;

[0038] Figure 5 is Figure 2 the sectional view along the cutting line A-A in

[0039] Figure 6 is Figure 3 the sectional view along the cutting line B-B in

[0040] Figure 7 The exploded view of a combined assembly device for an automotive universal joint proposed by the present invention;

[0041] Figure 8 is Figure 7 the enlarged partial view at position I in

[0042] Figure 9 is Figure 7 the enlarged partial view at position II in

[0043] Figure 10 is Figure 6 the enlarged partial view at position III in

[0044] Figure 11 is Figure 6 the enlarged partial view at position IV in

[0045] Figure 12 is Figure 5 the enlarged partial view at position V in

[0046] Figure 13 is Figure 5 the enlarged partial view at position VI in

[0047] Among them, 1. Automatic feeding retaining ring installation mechanism, 2. Two-way clamping and assembling mechanism, 3. Universal joint clamping mechanism, 4. Settlement and avoidance support assembly, 5. Automatic downward pressing transmission assembly, 6. Retaining ring feeding assembly, 7. Horizontal rack, 8. Transmission gear seat, 9. Transmission gear body, 10. Special-shaped downward pressing bracket, 11. Fixed vertical plate, 12. Horizontal slide bar, 13. Horizontal slide plate, 14. Feeding spring, 15. Vertical rack, 16. Magnetic retaining ring groove, 17. Elastic edge stop rod, 18. Two-way synchronous propulsion assembly, 19. Pushing combination assembly, 20. Gantry frame, 21. Screw rod support, 22. Double-threaded screw rod, 23. Screw rod drive gear, 24. Pushing slide bar, 25. T-shaped push block, 26. Nut slider, 27. Pushing spring, 28. Sliding push rod, 29. Universal joint assembly, 30. Axial propulsion assembly, 31. Rotating assembly, 32. Cross shaft ball core, 33. Transmission fork, 34. Installation bushing, 35. C-shaped retaining ring, 36. Propulsion bottom plate, 37. Propulsion guide rail, 38. Propulsion slider, 39. Propulsion electric cylinder, 40. Clamping base, 41. Rotating sleeve, 42. Rotating motor, 43. Pinion, 44. Support section, 45. Connecting shaft, 46. Transmission shaft part, 47. Tail flange, 48. Countersunk head groove, 49. Fixed ring, 50. External gear one, 51. Y-shaped support frame, 52. Sliding check return slider, 53. Slider return spring, 54. Ratchet tooth part, 55. Main body bottom plate.

[0048] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. Detailed implementation manners

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0050] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0051] Such as Figures 1 to 13As shown in the figure, the present invention provides a combined assembly device for an automotive universal joint, including an automatic feeding snap ring installation mechanism 1, a two-way clamping assembly mechanism 2, a universal joint clamping mechanism 3, and a settlement and avoidance support assembly 4. The automatic feeding snap ring installation mechanism 1 is arranged below the two-way clamping assembly mechanism 2, the two-way clamping assembly mechanism 2 is arranged on the settlement and avoidance support assembly 4, and the universal joint clamping mechanism 3 is arranged on the settlement and avoidance support assembly 4.

[0052] The settlement and avoidance support assembly 4 includes a Y-shaped support frame 51, a sliding check slider 52, a main body base plate 55, and a slider return spring 53. The Y-shaped support frame 51 is snap-fitted and slidably arranged in the main body base plate 55. The Y-shaped support frame 51 is provided with a ratchet tooth portion 54 in an array. The sliding check slider 52 is slidably arranged on the main body base plate 55. One end of the slider return spring 53 is arranged on the main body base plate 55, and the other end of the slider return spring 53 is arranged on the sliding check slider 52.

[0053] On the one hand, the Y-shaped support frame 51 can support the position of the cross shaft ball core 32 in the initial state. On the other hand, when pressing and installing the C-shaped snap ring 35 and rotating the subsequent installed transmission fork 33, the Y-shaped support frame 51 can automatically avoid the position by descending.

[0054] The universal joint clamping mechanism 3 includes a universal joint assembly 29, an axial propulsion assembly 30, and a rotation assembly 31. The axial propulsion assembly 30 is arranged on the main body base plate 55, the rotation assembly 31 is arranged on the axial propulsion assembly 30, and the universal joint assembly 29 is arranged on the rotation assembly 31.

[0055] The universal joint assembly 29 includes a cross shaft ball core 32, a transmission fork 33, a mounting bushing 34, and a C-shaped snap ring 35. Four groups of support sections 44 and connecting shafts 45 are evenly distributed in a ring outside the cross shaft ball core 32. The tail of the transmission fork 33 is provided with a transmission shaft portion 46. The transmission fork 33 and the connecting shaft 45 are rotatably connected through the mounting bushing 34. One end of the mounting bushing 34 is provided with a tail flange 47. The mounting bushing 34 is also provided with a countersunk head groove 48. The C-shaped snap ring 35 is snap-fitted in the countersunk head groove 48. Both ends of the C-shaped snap ring 35 are provided with clamping bases 40.

[0056] The connection between the cross shaft ball core 32 and the transmission fork 33 can be realized through the mounting bushing 34. The position of the mounting bushing 34 can be axially locked through the C-shaped snap ring 35, thus avoiding the embarrassing situation of the mounting bushing 34 slipping out during use. On the other hand, the support section 44 can not only leave a position and space for the contact of the Y-shaped support frame 51, but also make the installed cross shaft ball core 32 not generate obvious axial movement in the transmission fork 33 through the extrusion contact between its own shoulder and the mounting bushing 34.

[0057] The axial propulsion assembly 30 includes a propulsion base plate 36, a propulsion guide rail 37, a propulsion slider 38, and a propulsion electric cylinder 39. The propulsion base plate 36 is disposed on the main body base plate 55, the propulsion guide rail 37 is disposed on the propulsion base plate 36, the propulsion slider 38 is disposed on the propulsion guide rail 37, and the fixed end of the propulsion electric cylinder 39 is disposed on the propulsion base plate 36.

[0058] The rotation assembly 31 includes a clamping base 40, a rotating sleeve 41, a rotating motor 42, and a pinion 43. The clamping base 40 is disposed on the propulsion slider 38, the rotating sleeve 41 is rotatably disposed in the clamping base 40, an external gear one 50 is provided at one end of the rotating sleeve 41, the telescopic portion of the propulsion electric cylinder 39 is disposed at the bottom of the clamping base 40, the rotating motor 42 is disposed on the side of the clamping base 40, the pinion 43 is engaged and disposed on the output shaft of the rotating motor 42, and the pinion 43 and the external gear one 50 are in meshing transmission.

[0059] Through the axial propulsion assembly 30 and the rotation assembly 31, the axial sliding and horizontal rotation of the transmission fork 33 can be controlled, thereby creating conditions for the automatic assembly of the complex structure of the present invention.

[0060] The two-way clamping and assembling mechanism 2 includes a two-way synchronous propulsion assembly 18 and a pushing combination assembly 19. The two-way synchronous propulsion assembly 18 is disposed on the main body base plate 55, and the pushing combination assembly 19 is symmetrically disposed at both ends of the two-way synchronous propulsion assembly 18.

[0061] The two-way synchronous propulsion assembly 18 includes a gantry frame 20, a lead screw support 21, a double-threaded lead screw 22, and a lead screw drive gear 23. The gantry frame 20 is disposed on the main body base plate 55, the lead screw support 21 is disposed on the gantry frame 20, the double-threaded lead screw 22 is rotatably disposed in the lead screw support 21, the lead screw drive gear 23 is fixedly connected to the middle position of the double-threaded lead screw 22, and the double-threaded lead screw 22 is provided with threads in opposite directions on both sides of the lead screw drive gear 23.

[0062] By driving the rotation of the double-threaded lead screw 22 through an external device, the two T-shaped push blocks 25 can be controlled to approach and move away from each other. When the two T-shaped push blocks 25 approach each other, the assembly of the transmission fork 33 and the mounting bushing 34, as well as the connection between the mounting bushing 34 and the connecting shaft 45, can be completed by squeezing the mounting bushing 34.

[0063] The driving combination component 19 includes a driving slide bar 24, a T-shaped push block 25, a nut slider 26, and a driving spring 27. The driving slide bar 24 is fixedly connected to the bottom of the gantry frame 20. The T-shaped push block 25 is engaged and slidably arranged on the driving slide bar 24. The nut slider 26 is engaged and slidably arranged in the gantry frame 20. The nut slider 26 is in threaded transmission with the double-threaded lead screw 22. When the double-threaded lead screw 22 rotates, the two nut sliders 26 slide synchronously and in opposite directions. A sliding push rod 28 is arranged on the nut slider 26. The sliding push rod 28 is slidably arranged in the T-shaped push block 25. The driving spring 27 is arranged between the end of the sliding push rod 28 and the T-shaped push block 25.

[0064] Through the driving spring 27, when the T-shaped push block 25 is not fully limited, it can push the T-shaped push block 25 to slide and support the mounting bushing 34; after the mounting bushing 34 has been installed, the compression of the driving spring 27 can also prevent the T-shaped push block 25 from restricting the continuous sliding of the nut slider 26; thus overcoming the technical contradiction that the nut slider 26 needs to slide but cannot slide.

[0065] The automatic feeding snap ring installation mechanism 1 includes an automatic downward pressing transmission component 5 and a snap ring feeding component 6. The automatic downward pressing transmission component 5 is arranged on the bidirectional synchronous propulsion component 18. The snap ring feeding component 6 is arranged below the bidirectional synchronous propulsion component 18.

[0066] The automatic downward pressing transmission component 5 includes a horizontally arranged rack 7, a transmission gear seat 8, a transmission gear body 9, and a special-shaped downward pressing bracket 10. The horizontally arranged rack 7 is fixedly connected to the side of the T-shaped push block 25. The transmission gear seat 8 is fixedly connected to the bottom of the gantry frame 20. The transmission gear body 9 is rotatably arranged in the transmission gear seat 8. The transmission gear body 9 is in meshing transmission with the horizontally arranged rack 7. The special-shaped downward pressing bracket 10 passes through the gantry frame 20 and slides up and down. A vertically arranged rack 15 is arranged on the special-shaped downward pressing bracket 10. The vertically arranged rack 15 is in meshing transmission with the transmission gear body 9. A magnetic snap ring groove 16 is also arranged on the special-shaped downward pressing bracket 10. Elastic edge retaining rods 17 are symmetrically arranged on both sides of the special-shaped downward pressing bracket 10.

[0067] Through the transmission of the horizontally arranged rack 7 and the transmission gear body 9, during the horizontal sliding of the T-shaped push block 25, the special-shaped downward pressing bracket 10 can generate synchronous longitudinal sliding. By the downward movement of the special-shaped downward pressing bracket 10, the C-shaped snap ring 35 located in the magnetic snap ring groove 16 can be lowered and stuck in the countersunk head groove 48, thereby limiting the axial position of the mounting bushing 34 through the C-shaped snap ring 35, and then completing the assembly and fixation of the universal joint component 29.

[0068] The snap ring feeding component 6 includes a fixed vertical plate 11, a horizontally arranged sliding rod 12, a horizontally arranged sliding plate 13 and a feeding spring 14. The fixed vertical plate 11 is fixedly connected to the lower part of the gantry frame 20. The horizontally arranged sliding rod 12 is fixedly connected to the fixed vertical plate 11. The horizontally arranged sliding plate 13 is engaged and slidably arranged on the horizontally arranged sliding rod 12. The feeding spring 14 is arranged between the fixed vertical plate 11 and the horizontally arranged sliding plate 13.

[0069] Through the feeding spring 14, the C-shaped snap ring 35 located on the horizontally arranged sliding rod 12 can always have a tendency to slide towards the magnetic snap ring groove 16, so that after the magnetic snap ring groove 16 reaches the designated position, the feeding and position limitation of the C-shaped snap ring 35 can be automatically completed.

[0070] During specific use, first, the user needs to place the cross shaft ball core 32 on the Y-shaped support frame 51. Since the Y-shaped support frame 51 supports and clamps the support section 44, the cross shaft ball core 32 will not rotate freely on the Y-shaped support frame 51 without external force. Then, the elongation of the propulsion electric cylinder 39 is used to horizontally push a transmission fork 33 towards the position where the cross shaft ball core 32 is located;

[0071] The mounting bushing 34 is pre-installed in the hole of the cross shaft ball core 32 in a previous process. The front end of the mounting bushing 34 and the hole of the cross shaft ball core 32 are in clearance fit, so the pre-installation of the mounting bushing 34 can be completed manually or with a small force; during the subsequent pressing and installation process, the mounting bushing 34 and the cross shaft ball core 32 gradually change to interference fit and interference fit.

[0072] After the cross shaft ball core 32 is pushed to the position where the mounting bushing 34 and the connecting shaft 45 are coaxial, it stops. Then, an external device drives the gear 23 with the double-threaded lead screw 22 to rotate through the lead screw. Since different-direction threads are provided at both ends of the double-threaded lead screw 22, when the double-threaded lead screw 22 rotates, the nut sliders 26 at both ends will slide towards the center simultaneously, and at the same time, the T-shaped push block 25 is pushed towards the middle by the pushing spring 27;

[0073] When the T-shaped push block 25 contacts and pushes the sliding rod 24, as the compression amount of the pushing spring 27 increases, the T-shaped push block 25 can completely install the mounting bushing 34 into the cross shaft ball core 32 and sleuth the mounting bushing 34 outside the connecting shaft 45, so as to complete the connection between the transmission fork 33 and the cross shaft ball core 32. After the installation is completed, the mounting bushing 34 and the transmission fork 33 are relatively fixed, and the connecting shaft 45 can rotate in the mounting bushing 34.

[0074] Then the nut slider 26 continues to slide. During the process of the nut slider 26 driving the horizontal rack 7 to slide, it will drive the special-shaped pressing bracket 10 to descend through the transmission gear body 9. When the C-shaped retaining ring 35 located on the magnetic retaining ring groove 16 descends to the counterbore 48, the mounting bushing 34 has been installed. At this time, if the special-shaped pressing bracket 10 continues to descend, it will snap-fit the C-shaped retaining ring 35 on the magnetic retaining ring groove 16 into the counterbore 48; during this process, the C-shaped retaining ring 35 is sleeved on the mounting bushing 34 through its own deformation. At the same time, the special-shaped pressing bracket 10 will also press down the Y-shaped support frame 51. At this time, since the cross-axis ball core 32 has been installed on the transmission fork 33, and there is also a rotational resistance between the connecting shaft 45 and the mounting bushing 34, the descent of the Y-shaped support frame 51 will not affect the current position of the cross-axis ball core 32.

[0075] Through the cooperation of the ratchet part 54 and the rotary motor 42, the Y-shaped support frame 51 will not rebound after descending;

[0076] After the C-shaped retaining ring 35 is installed, the two nut sliders 26 are moved away from each other by rotating the double-threaded lead screw 22 in the reverse direction, and after the pushing spring 27 rebounds and resets, the T-shaped push block 25 can also be reset;

[0077] When the special-shaped pressing bracket 10 rises, the magnetic attraction of the magnetic retaining ring groove 16 is not sufficient to lift the C-shaped retaining ring 35 that has been stuck in the counterbore 48, so the C-shaped retaining ring 35 will stay in the counterbore 48; during the ascending and descending process of the special-shaped pressing bracket 10, due to the obstruction of the special-shaped pressing bracket 10 itself, the C-shaped retaining ring 35 located on the horizontal slide bar 12 cannot be pushed forward. Only after the magnetic retaining ring groove 16 is reset to the top limit position, the frontmost C-shaped retaining ring 35 on the horizontal slide bar 12 can slide into the magnetic retaining ring groove 16 and be temporarily fixed by the magnetic attraction of the magnetic retaining ring groove 16. The elastic edge bars 17 on both sides can not only prevent the C-shaped retaining ring 35 from freely rotating in the magnetic retaining ring groove 16, but also allow the C-shaped retaining ring 35 to undergo a phase change through its own deformation during installation.

[0078] Each ascending and descending of the special-shaped pressing bracket 10 will drive a set of C-shaped retaining rings 35 to descend and install them on the lower counterbore 48; after the cross-axis ball core 32 and a transmission fork 33 are installed, the transmission fork 33 is driven to rotate by the rotary motor 42 to rotate the cross-axis ball core 32 by ninety degrees, and then the other transmission fork 33 is pushed to the designated position, and the installation of the mounting bushing 34 and the C-shaped retaining ring 35 can be completed in the same way as the above steps.

[0079] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0080] The above describes the present invention and its embodiments. Such a description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the spirit of the present invention, design similar structural forms and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A combined assembly device for automobile universal joints, characterized in that: The invention comprises an automatic feeding retaining ring installation mechanism (1), a two-way clamping assembly mechanism (2), a universal joint clamping mechanism (3) and a subsidence avoidance type support assembly (4), wherein the automatic feeding retaining ring installation mechanism (1) is arranged below the two-way clamping assembly mechanism (2), the two-way clamping assembly mechanism (2) is arranged on the subsidence avoidance type support assembly (4), and the universal joint clamping mechanism (3) is arranged on the subsidence avoidance type support assembly (4); The sinking avoidance support assembly (4) comprises a main body bottom plate (55), and the bidirectional clamping assembly mechanism (2) comprises a bidirectional synchronous propulsion assembly (18) and a propulsion combination assembly (19), wherein the bidirectional synchronous propulsion assembly (18) is arranged on the main body bottom plate (55), and the propulsion combination assembly (19) is symmetrically arranged at two ends of the bidirectional synchronous propulsion assembly (18); The automatic loading retaining ring installation mechanism (1) comprises an automatic downward pressing transmission assembly (5) and a retaining ring loading assembly (6), wherein the automatic downward pressing transmission assembly (5) is arranged on the bidirectional synchronous advancing assembly (18), and the retaining ring loading assembly (6) is arranged below the bidirectional synchronous advancing assembly (18); The universal joint clamping mechanism (3) comprises a universal joint assembly (29), an axial propulsion assembly (30) and a rotation assembly (31), wherein the axial propulsion assembly (30) is arranged on the main body bottom plate (55), the rotation assembly (31) is arranged on the axial propulsion assembly (30), and the universal joint assembly (29) is arranged on the rotation assembly (31); The bidirectional synchronous propulsion assembly (18) comprises a gantry frame (20), a screw support (21), a double-threaded screw (22) and a screw drive gear (23), wherein the gantry frame (20) is arranged on a main body bottom plate (55), the screw support (21) is arranged on the gantry frame (20), the double-threaded screw (22) is rotatably arranged in the screw support (21), the screw drive gear (23) is fixedly connected to a middle position of the double-threaded screw (22), and the double-threaded screw (22) is provided with threads in opposite directions on both sides of the screw drive gear (23); The pushing assembly (19) comprises a pushing slide bar (24), a T-shaped push block (25), a nut slider (26) and a pushing spring (27); the pushing slide bar (24) is fixedly connected to the bottom of the gantry frame (20); the T-shaped push block (25) is slidably mounted on the pushing slide bar (24); the nut slider (26) is slidably mounted in the gantry frame (20); the nut slider (26) and the double-threaded screw (22) are threadedly driven; when the double-threaded screw (22) rotates, the two nut sliders (26) slide synchronously and in opposite directions; a sliding push rod (28) is provided on the nut slider (26); the sliding push rod (28) is slidably mounted in the T-shaped push block (25); and the pushing spring (27) is disposed between the end of the sliding push rod (28) and the T-shaped push block (25); The automatic downward pressing transmission assembly (5) comprises a transverse rack (7), a transmission gear seat (8), a transmission gear body (9) and a special-shaped downward pressing bracket (10), wherein the transverse rack (7) is fixedly connected to the side of the T-shaped push block (25), the transmission gear seat (8) is fixedly connected to the bottom of the gantry frame (20), the transmission gear body (9) is rotatably arranged in the transmission gear seat (8), the transmission gear body (9) and the transverse rack (7) are meshed for transmission, the special-shaped downward pressing bracket (10) passes through the gantry frame (20) and slides up and down, the special-shaped downward pressing bracket (10) is provided with a longitudinal rack (15), the longitudinal rack (15) and the transmission gear body (9) are meshed for transmission, the special-shaped downward pressing bracket (10) is also provided with a magnetic retaining ring groove (16), and elastic edge retaining rods (17) are symmetrically provided on both sides of the special-shaped downward pressing bracket (10).

2. The assembly device of a vehicle universal joint according to claim 1, characterized in that: The retaining ring feeding assembly (6) comprises a fixed vertical plate (11), a transverse slide bar (12), a transverse slide plate (13) and a feeding spring (14); the fixed vertical plate (11) is fixedly connected to the bottom of the gantry frame (20); the transverse slide bar (12) is fixedly connected to the fixed vertical plate (11); the transverse slide plate (13) is slidably engaged on the transverse slide bar (12); and the feeding spring (14) is arranged between the fixed vertical plate (11) and the transverse slide plate (13).

3. The assembly device of a vehicle universal joint according to claim 2, characterized in that: The universal joint assembly (29) comprises a cross-axis ball core (32), a transmission fork (33), a mounting sleeve (34) and a C-shaped retaining ring (35); four groups of support sections (44) and connecting shafts (45) are evenly distributed in an annular shape on the outer side of the cross-axis ball core (32); a transmission shaft portion (46) is provided at the rear end of the transmission fork (33); the transmission fork (33) and the connecting shaft (45) are rotatably connected via the mounting sleeve (34); a rear flange (47) is provided at one end of the mounting sleeve (34); a countersunk groove (48) is also provided on the mounting sleeve (34); the C-shaped retaining ring (35) is engaged in the countersunk groove (48); and clamping bases (40) are provided at both ends of the C-shaped retaining ring (35).

4. The assembly device of a vehicle universal joint according to claim 3, characterized in that: The axial propulsion assembly (30) comprises a propulsion base plate (36), a propulsion guide rail (37), a propulsion slider (38) and a propulsion electric cylinder (39); the propulsion base plate (36) is arranged on the main body base plate (55); the propulsion guide rail (37) is arranged on the propulsion base plate (36); the propulsion slider (38) is arranged on the propulsion guide rail (37); and the fixed end of the propulsion electric cylinder (39) is arranged on the propulsion base plate (36).

5. The assembly device of a vehicle universal joint according to claim 4, characterized in that: The rotating assembly (31) comprises a clamping base (40), a rotating sleeve (41), a rotating motor (42) and a pinion (43); the clamping base (40) is arranged on the advancing slider (38); the rotating sleeve (41) is rotatably arranged in the clamping base (40); an external gear (50) is arranged at one end of the rotating sleeve (41); the telescopic portion of the advancing electric cylinder (39) is arranged at the bottom of the clamping base (40); the rotating motor (42) is arranged on the side of the clamping base (40); the pinion (43) is engaged with the output shaft of the rotating motor (42); and the pinion (43) and the external gear (50) are meshed for transmission.

6. The assembly device of a vehicle universal joint according to claim 5, characterized in that: The sinking avoidance support assembly (4) further comprises a Y-shaped support frame (51), a sliding non-return slider (52) and a slider return spring (53); the Y-shaped support frame (51) is slidably arranged in the main body bottom plate (55); a ratchet portion (54) is arranged in an array on the Y-shaped support frame (51); the sliding non-return slider (52) is slidably arranged on the main body bottom plate (55); one end of the slider return spring (53) is arranged on the main body bottom plate (55); and the other end of the slider return spring (53) is arranged on the sliding non-return slider (52).

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