Chassis follow-up U-shaped bolt tightening device

Abstract

The utility model discloses a chassis follow-up U-shaped bolt tightening device which comprises a walking trolley and a cross adjustable displacement platform, a base is arranged on the top of the cross adjustable displacement platform, two vertical sliding rails are arranged on the base, a lifting seat is arranged on the two vertical sliding rails, and a U-shaped bolt is arranged on the lifting seat. Two transverse guide rails are arranged on the two sides of the top of the lifting seat, two transverse moving sliding seats are arranged on the two transverse guide rails, a transverse position adjusting mechanism for driving the two transverse moving sliding seats to slide is arranged on one side of the lifting seat, a longitudinal sliding rail is arranged on each transverse moving sliding seat, two longitudinal moving sliding seats are arranged on each longitudinal sliding rail in a sliding mode, and the transverse position adjusting mechanism is arranged on the lifting seat. A longitudinal position adjusting mechanism for driving the two longitudinal moving sliding seats to slide is arranged on the transverse moving sliding seat, and vertically-arranged electric wrenches are arranged on the four longitudinal moving sliding seats. The utility model belongs to the technical field of automobile assembly, positions of four electric wrenches and nut sleeves can be adjusted, and four nuts on two U-shaped bolts can be tightened at a time.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile assembly, and more specifically to a chassis follower U-shaped bolt tightening device. Background Art

[0002] In the prior art, chassis U-bolts are commonly found in leaf spring suspension systems, fixing leaf springs to the axles. Due to differences in manufacturing strategies and process layouts, tightening of U-bolts is commonly found in static workstations on the assembly line and high-level workstations on the chassis of the final assembly line. U-bolts generally require relatively high process torques and are usually equipped with power-assisted torque-reducing arms to assist in tightening. Chassis high-level U-bolts are often tightened using a single-axis torque-reducing arm electric gun or a dual-axis torque-reducing arm electric gun.

[0003] When installing and fixing U-bolts, there are the following problems: U-bolts usually appear in pairs. When tightened with a single-axis anti-torsion arm electric gun, one side needs to be tightened four times. If both the front and rear axles have U-bolts, one side needs to be tightened eight times. When tightened with a double-axis anti-torsion arm electric gun, one side needs to be tightened twice. If both the front and rear axles have U-bolts, they need to be tightened four times. For double-axis anti-torsion arms without servo variable pitch systems, U-bolts of various specifications and sizes cannot be compatible. Whether single-axis or double-axis anti-torsion arm electric guns have a large torque attenuation. Utility Model Content

[0004] The technical problem to be solved by the utility model is to solve the deficiencies of the prior art, and the purpose of the utility model is to provide a chassis follower U-bolt tightening device.

[0005] To achieve the above-mentioned purpose, the utility model provides a chassis follower U-bolt tightening device, comprising a traveling trolley, a frame of the traveling trolley is installed with a cross-adjustable displacement platform, the platform top of the cross-adjustable displacement platform is provided with a base, the base is provided with two vertical slide rails, the two vertical slide rails are provided with a lifting seat, two transverse guide rails are provided on both sides of the top of the lifting seat, the two transverse guide rails jointly support two slidable transverse slides, one side of the lifting seat is provided with a transverse positioning mechanism for driving the two transverse slides to slide, each of the transverse slides is provided with a longitudinal slide rail, each of the longitudinal slide rails is slidably provided with two longitudinal slides, the transverse slide is provided with a longitudinal positioning mechanism for driving the two longitudinal slides to slide, and the four longitudinal slides are provided with vertically arranged electric wrenches and nut sleeves on the output shaft of the electric wrench.

[0006] Preferably, the cross-adjustable displacement platform includes a longitudinal linear slide, a longitudinal platform arranged on the longitudinal linear slide, a transverse linear slide arranged on the longitudinal platform and a transverse platform arranged on the transverse linear slide, and the longitudinal linear slide is arranged on the frame of the traveling trolley.

[0007] Preferably, a rack and pinion transmission assembly is provided between the longitudinal platform and the transverse platform, the rack of the rack and pinion transmission assembly is provided at the bottom of the transverse platform, the gear of the rack and pinion transmission assembly is provided on the longitudinal platform, and a transverse displacement encoder connected to the central axis of the gear of the rack and pinion transmission assembly is provided on the longitudinal platform; a longitudinal displacement sensor adapted to the end face of the longitudinal platform is provided on the frame of the traveling trolley.

[0008] Preferably, a guide cylinder is provided at the center of the transverse platform, the base is rotatably mounted on the guide cylinder via an axial bearing, and a disc structure matched with the axial bearing is provided at the bottom of the base.

[0009] Preferably, a top plate is provided on the top of the lifting seat, the transverse guide rail is provided on the top plate, the transverse positioning mechanism includes a first bidirectional screw rotatably mounted at the bottom of one side of the top plate through two first bearing seats and first connecting pieces threadedly connected to both ends of the first bidirectional screw are respectively provided on the outer sides of the two transverse sliding seats, and a transverse driving motor for driving the first bidirectional screw to rotate is provided at the bottom of one side of the top plate.

[0010] Preferably, the longitudinal positioning mechanism includes two second bearing seats provided on the transverse slide and second bidirectional screws provided on the two second bearing seats, and the two longitudinal slides are provided with second connecting pieces threadedly connected to both ends of the second bidirectional screws.

[0011] Preferably, frames connecting the two vertical slide rails are provided on both sides, and one of the frames is provided with a parts slot and an operating handle.

[0012] Preferably, the lifting seat includes two columns connected to the slides of the two vertical slide rails and a connecting rod connecting the bottoms of the two columns, and the top plate is installed on the top ends of the two columns.

[0013] Preferably, lifting cylinders are provided on both sides of the lifting seat, and push rods of the lifting cylinders are connected to the base.

[0014] Preferably, a vehicle track is provided below the traveling trolley, a traveling wheel and a traveling motor driving device for driving the traveling wheel are provided at the bottom of the traveling trolley, and a guide wheel group adapted to the two sides of the vehicle track is provided at the bottom of the traveling trolley.

[0015] Beneficial Effects

[0016] The advantages of the utility model are:

[0017] The chassis follow-up U-bolt tightening device of the utility model can adjust the positions of four electric wrenches and nut sleeves, can tighten four nuts on two U-bolts at one time, and can tighten nuts for two U-bolts with different spacings and U-bolts of different models and sizes, has good adaptability, and effectively improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural stereogram of the chassis follower U-bolt tightening device of the utility model;

[0019] Figure 2 This is a structural front view of the chassis follower U-bolt tightening device of the utility model;

[0020] Figure 3 It is a structural side view of the chassis follower U-bolt tightening device of the utility model;

[0021] Figure 4 This is a structural stereogram of the chassis follower U-bolt tightening device of the utility model with the outer shell removed;

[0022] Figure 5 This is a structural front view of the chassis follower U-bolt tightening device of the utility model with the outer shell removed;

[0023] Figure 6 It is a top view of the structure of the chassis follower U-bolt tightening device of the utility model after removing the outer shell;

[0024] Figure 7 The utility model is a structural side view of the chassis follower U-bolt tightening device with the outer shell removed.

[0025] Among them: 1. Traveling trolley; 2. Cross-adjustable displacement platform; 3. Base; 4. Vertical slide rail; 5. Lifting seat; 6. Lifting cylinder; 7. Horizontal guide rail; 8. Horizontal sliding seat; 9. Horizontal adjustment mechanism; 10. Longitudinal slide rail; 11. Longitudinal sliding seat; 12. Longitudinal adjustment mechanism; 13. Electric wrench; 14. Nut sleeve; 15. Longitudinal linear slide rail; 16. Longitudinal platform; 17. Horizontal linear slide rail; 18. Horizontal platform; 19. Rack and pinion transmission assembly; 20. Horizontal position Shift encoder; 21. longitudinal displacement sensor; 22. guide cylinder; 23. top plate; 24. first bearing seat; 25. first bidirectional screw; 26. first connecting piece; 27. transverse drive motor; 28. second bearing seat; 29. ​​second bidirectional screw; 30. second connecting piece; 31. frame; 32. parts slot; 33. operating handle; 34. push rod; 35. vehicle track; 36. walking wheel; 37. walking motor drive device; 38. guide wheel group; 39. longitudinal drive motor. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the embodiments, but does not constitute any limitation to the utility model. Any limited modifications made by anyone within the scope of the claims of the utility model are still within the scope of the claims of the utility model.

[0027] See also Figure 1-7 As shown, a chassis follower U-bolt tightening device of the utility model comprises a traveling trolley 1, a cross-adjustable displacement platform 2 is installed on the frame of the traveling trolley 1, a base 3 is provided on the top of the platform of the cross-adjustable displacement platform 2, two vertical slide rails 4 are provided on the base 3, a lifting seat 5 is provided on the two vertical slide rails 4, two transverse guide rails 7 are provided on both sides of the top of the lifting seat 5, two slidable transverse slide seats 8 are jointly supported on the two transverse guide rails 7, and one side of the lifting seat 5 is provided with a driving mechanism for driving two The transverse adjustment mechanism 9 for the sliding of the transverse slide 8, each of the transverse slides 8 is provided with a longitudinal slide rail 10, each of the longitudinal slide rails 10 is slidably provided with two longitudinal slides 11, the transverse slide 8 is provided with a longitudinal adjustment mechanism 12 for driving the two longitudinal slides 11 to slide, the four longitudinal slides 11 are provided with vertically arranged electric wrenches 13 and nut sleeves 14 on the output shafts of the electric wrenches 13, the tops of the output shafts of the four electric wrenches 13 are provided with limiting plates, and the limiting plates are provided with large through holes for the output shafts to pass through.

[0028] The chassis follow-up U-bolt tightening device is provided with a movable walking trolley 1, which travels under the chassis, and adjusts the position of the base 3 left and right and front and back through the cross-adjustable displacement platform 2, so that the four electric wrenches 13 above the base 3 are aligned with the two U-bolts in the leaf spring suspension system of the automobile chassis, so that the four nut sleeves 14 tighten the four nuts on the two U-bolts. The staff can adjust the position of the base 3 by pushing and pulling the cross-adjustable displacement platform 2, which is convenient, fast and easy to operate;

[0029] Moreover, in the chassis follower U-bolt tightening device, four electric wrenches 13 are adjustably mounted on the lifting seat 5 via the transverse guide rails 7 and the longitudinal slide rails 10, and the relative positions of the four electric wrenches 13 are adjusted via the transverse adjustment mechanism 9 and the longitudinal adjustment mechanism 12, so that the four electric wrenches 13 can adapt to the tightening work of U-bolts of different specifications.

[0030] The utility model discloses a chassis follow-up U-bolt tightening device, which can adjust the positions of four electric wrenches and nut sleeves 14, and can tighten four nuts on two U-bolts at one time. Moreover, it can tighten nuts for two U-bolts with different spacings and U-bolts of different models and sizes, and has good adaptability, thereby effectively improving work efficiency.

[0031] Furthermore, the cross-adjustable displacement platform 2 includes a longitudinal linear slide 15, a longitudinal platform 16 disposed on the longitudinal linear slide 15, a transverse linear slide 17 disposed on the longitudinal platform 16, and a transverse platform 18 disposed on the transverse linear slide 17. The longitudinal linear slide 15 is disposed on the frame of the traveling trolley 1. The longitudinal platform 16 can stably slide longitudinally on the longitudinal linear slide 15, and the transverse platform 18 can stably slide transversely on the transverse linear slide 17. The moving direction of the longitudinal platform 16 is perpendicular to the moving direction of the transverse platform 18.

[0032] Furthermore, a rack and pinion transmission assembly 19 is provided between the longitudinal platform 16 and the transverse platform 18, the rack of the rack and pinion transmission assembly 19 is provided at the bottom of the transverse platform 18, the gear of the rack and pinion transmission assembly 19 is provided on the longitudinal platform 16, and a transverse displacement encoder 20 connected to the central axis of the gear of the rack and pinion transmission assembly 19 is provided on the longitudinal platform 16; a longitudinal displacement sensor 21 adapted to the end face of the longitudinal platform 16 is provided on the frame of the traveling trolley 1, and a control box electrically connected to the transverse displacement encoder 20 and the longitudinal displacement sensor 21 is provided on the traveling trolley 1.

[0033] In this embodiment, when the transverse platform 18 moves laterally, it drives the gear to rotate, and then the transverse displacement encoder 20 reads the number of revolutions of the gear, thereby detecting the displacement distance of the transverse platform 18; the longitudinal displacement sensor 21 is a position sensor that can detect the displacement distance of the longitudinal platform 16.

[0034] Furthermore, a guide cylinder 22 is provided at the center of the horizontal platform 18, and the base 3 is rotatably mounted on the guide cylinder 22 through an axial bearing. A disc structure adapted to the axial bearing is provided at the bottom of the base 3. The base 3 can rotate relatively to adjust the angular position of the base 3 so that the four electric wrenches 13 above are aligned with the nuts of the U-bolts.

[0035] Furthermore, a top plate 23 is provided on the top of the lifting seat 5, the transverse guide rail 7 is provided on the top plate 23, the transverse adjustment mechanism 9 includes a first bidirectional screw 25 rotatably mounted at the bottom of one side of the top plate 23 through two first bearing seats 24 and first connecting members 26 threadedly connected to both ends of the first bidirectional screw 25 are respectively provided on the outer sides of the two transverse slides 8, a screw nut threadedly connected to the first bidirectional screw 25 is provided on the first connecting member 26, and a transverse driving motor 27 for driving the first bidirectional screw 25 to rotate is provided at the bottom of one side of the top plate 23.

[0036] In this embodiment, the transverse drive motor 27 drives the first bidirectional screw 25 to rotate, the first bidirectional screw 25 drives the two first connecting members 26 to move laterally relative to or oppositely, and the first connecting member 26 drives the transverse slide 8 to move, so that the two longitudinal slide rails 10 and the longitudinal slide 11 follow the transverse slide 8 to adjust the horizontal position, adjust the distance between the two longitudinal slide rails 10, and realize the adjustment of the horizontal distance between the two electric wrenches 13 located at the same end.

[0037] Furthermore, the longitudinal positioning mechanism 12 includes two second bearing seats 28 provided on the transverse slide 8 and second bidirectional screws 29 provided on the two second bearing seats 28, the two longitudinal slides 11 are provided with second connecting members 30 threadedly connected to the two ends of the second bidirectional screws 29, the second connecting members 30 are provided with screw nuts threadedly connected to the second bidirectional screws 29, and the transverse slide 8 is provided with a longitudinal driving motor 39 for driving the second bidirectional screw 29 to rotate.

[0038] In this embodiment, the longitudinal drive motor 39 drives the second bidirectional screw 29 to rotate, the second bidirectional screw 29 drives the two second connecting members 30 to move longitudinally relative to or oppositely, and the second connecting members 30 drives the two longitudinal slides 11 to move longitudinally relative to or oppositely, thereby adjusting the two longitudinal slides 11 and the electric wrenches 13 on the longitudinal slides 11 to adjust the longitudinal position, and adjusting the longitudinal distance between the two electric wrenches 13 located on the same side.

[0039] Furthermore, frames 31 connecting the two vertical slide rails 4 are provided on both sides, and one of the frames 31 is provided with a parts slot 32 and an operating handle 33. The staff can push the base 3 to move left and right and forward and backward through the operating handle 33, and the parts slot 32 stores nut sleeves 14 of different specifications and sizes.

[0040] Furthermore, the lifting seat 5 includes two columns connected to the slides of the two vertical slide rails 4 and a connecting rod connecting the bottoms of the two columns, and the top plate 23 is installed on the top ends of the two columns.

[0041] Furthermore, lifting cylinders 6 are provided on both sides of the lifting seat 5, and the lifting cylinders 6 are provided on the side of the column of the lifting seat 5, and the push rods 34 of the lifting cylinders 6 are connected to the base 3. In this embodiment, the lifting cylinders 6 work to extend or retract the push rods 34, so that the lifting seat 5 can be lifted up or slid down.

[0042] Furthermore, a track 35 is provided at the bottom of the traveling trolley 1 , a traveling wheel 36 and a traveling motor driving device 37 for driving the traveling wheel 36 are provided at the bottom of the traveling trolley 1 , and a guide wheel group 38 adapted to the two sides of the track 35 is provided at the bottom of the traveling trolley 1 .

[0043] During specific work, the walking trolley 1 travels under the chassis, and the longitudinal platform 16 of the cross-adjustable displacement platform 2 can stably slide longitudinally on the longitudinal linear slide rail 15, and the transverse platform 18 of the cross-adjustable displacement platform 2 can stably slide transversely on the transverse linear slide rail 17. The moving direction of the longitudinal platform 16 is perpendicular to the moving direction of the transverse platform 18, and the position of the base 3 is adjusted left and right, front and back, so that the four electric wrenches 13 above the base 3 are aligned with the two U-bolts in the leaf spring suspension system of the automobile chassis, and the four nut sleeves 14 tighten the four nuts on the two U-bolts. The staff can adjust the position of the base 3 by pushing and pulling the cross-adjustable displacement platform 2, which is convenient, fast and easy to operate.

[0044] When tightening U-bolts of different sizes, the first bidirectional screw 25 is driven to rotate by the transverse driving motor 27, and the first bidirectional screw 25 drives the two first connecting members 26 to move laterally relative to or oppositely, and the first connecting member 26 drives the transverse slide 8 to move, so that the two longitudinal slide rails 10 and the longitudinal slide 11 follow the transverse slide 8 to adjust the position laterally, adjust the distance between the two longitudinal slide rails 10, and adjust the transverse distance between the two electric wrenches 13 located at the same end; when the first bidirectional screw 25 is driven to rotate by the transverse driving motor 27, the first bidirectional screw 25 drives the two first connecting members 26 to move laterally relative to or oppositely, and the first connecting member 26 drives the transverse slide 8 to move. The screw rod 25 drives the two first connecting members 26 to move laterally relative to or oppositely, and the first connecting member 26 drives the transverse slide 8 to move, so that the two longitudinal slide rails 10 and the longitudinal slide 11 follow the transverse slide 8 to adjust the position laterally, and adjust the distance between the two longitudinal slide rails 10, so as to adjust the transverse distance between the two electric wrenches 13 located at the same end; thereby, the spacing between the four electric wrenches 13 can be adjusted to adapt to the tightening of U-bolts of different specifications. Through this device, two U-bolts can be tightened at the same time, which greatly improves the assembly speed and improves the production efficiency.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A chassis follower U-bolt tightening device, characterized in that: The invention comprises a walking trolley (1), a frame of which is mounted a cross-adjustable displacement platform (2), a base (3) is provided on the top of the platform of the cross-adjustable displacement platform (2), two vertical slide rails (4) are provided on the base (3), a lifting seat (5) is provided on the two vertical slide rails (4), two transverse guide rails (7) are provided on both sides of the top of the lifting seat (5), two slidable transverse slide seats (8) are jointly supported on the two transverse guide rails (7), and the lifting seat (5) is provided with a plurality of vertical slide rails (4) and a plurality of vertical slide rails (4). A lateral positioning mechanism (9) for driving the two lateral sliding seats (8) to slide is provided on one side, each of the lateral sliding seats (8) is provided with a longitudinal slide rail (10), and two longitudinal sliding seats (11) are slidably provided on each of the longitudinal slide rails (10), and a longitudinal positioning mechanism (12) for driving the two longitudinal sliding seats (11) to slide is provided on the lateral sliding seat (8), and vertically arranged electric wrenches (13) and nut sleeves (14) on the output shafts of the electric wrenches (13) are provided on the four longitudinal sliding seats (11).

2. A chassis follower U-bolt tightening device according to claim 1, characterized in that: The cross-adjustable displacement platform (2) comprises a longitudinal linear slide rail (15), a longitudinal platform (16) arranged on the longitudinal linear slide rail (15), a transverse linear slide rail (17) arranged on the longitudinal platform (16), and a transverse platform (18) arranged on the transverse linear slide rail (17); the longitudinal linear slide rail (15) is arranged on the frame of the traveling trolley (1).

3. A chassis follower U-bolt tightening device according to claim 2, characterized in that: A rack and pinion transmission assembly (19) is provided between the longitudinal platform (16) and the transverse platform (18); a rack of the rack and pinion transmission assembly (19) is provided at the bottom of the transverse platform (18); a gear of the rack and pinion transmission assembly (19) is provided on the longitudinal platform (16); a transverse displacement encoder (20) connected to the central axis of the gear of the rack and pinion transmission assembly (19) is provided on the longitudinal platform (16); and a longitudinal displacement sensor (21) adapted to the end face of the longitudinal platform (16) is provided on the frame of the walking trolley (1).

4. A chassis follower U-bolt tightening device according to claim 2, characterized in that: A guide cylinder (22) is provided at the center of the transverse platform (18), the base (3) is rotatably mounted on the guide cylinder (22) via an axial bearing, and a disc structure matched with the axial bearing is provided at the bottom of the base (3).

5. The chassis follower U-bolt tightening device according to claim 1, characterized in that: A top plate (23) is provided on the top of the lifting seat (5), the transverse guide rail (7) is provided on the top plate (23), the transverse adjustment mechanism (9) comprises a first bidirectional screw (25) rotatably mounted at the bottom of one side of the top plate (23) through two first bearing seats (24) and first connecting members (26) threadedly connected to the two ends of the first bidirectional screw (25) are respectively provided on the outer sides of the two transverse sliding seats (8), and a transverse driving motor (27) for driving the first bidirectional screw (25) to rotate is provided at the bottom of one side of the top plate (23).

6. A chassis follower U-bolt tightening device according to claim 5, characterized in that: The longitudinal positioning mechanism (12) comprises two second bearing seats (28) provided on the transverse sliding seat (8) and second bidirectional screws (29) provided on the two second bearing seats (28), and the two longitudinal sliding seats (11) are provided with second connecting pieces (30) threadedly connected to both ends of the second bidirectional screws (29).

7. A chassis follower U-bolt tightening device according to claim 5, characterized in that: Frames (31) connecting the two vertical slide rails (4) are provided on both sides thereof, and a parts slot (32) and an operating handle (33) are provided on one of the frames (31).

8. The chassis follower U-bolt tightening device according to claim 7, characterized in that: The lifting seat (5) comprises two columns connected to the slides of the two vertical slide rails (4) and a connecting rod connecting the bottoms of the two columns, and the top plate (23) is installed on the top ends of the two columns.

9. A chassis follower U-bolt tightening device according to claim 8, characterized in that: Lifting cylinders (6) are provided on both sides of the lifting seat (5), and push rods (34) of the lifting cylinders (6) are connected to the base (3).

10. The chassis follower U-bolt tightening device according to claim 1, characterized in that: A vehicle track (35) is provided below the traveling trolley (1), a traveling wheel (36) and a traveling motor driving device (37) for driving the traveling wheel (36) are provided at the bottom of the traveling trolley (1), and a guide wheel group (38) adapted to the two surfaces of the vehicle track (35) is provided at the bottom of the traveling trolley (1).

Images