Passenger car rear cover positioning and clamping device

Abstract

The utility model discloses a passenger car rear cover positioning and clamping device, and relates to the technical field of car assembly.The two ends of the top of a base are each provided with a clamping mechanism, each clamping mechanism comprises a supporting column, a first motor, a first lead screw, a lifting seat, a rotating shaft, a U-shaped plate and a clamping piece, the supporting columns are arranged on the base, the first motors are arranged at the top ends of the supporting columns, and the first lead screws are arranged on the first motors; the output end of the first motor is connected with a first lead screw, the first lead screw is in threaded connection with a lifting seat, the lifting seat is in sliding connection with the supporting column, the lifting seat is rotationally connected with a rotating shaft, a U-shaped plate is vertically and fixedly arranged on the rotating shaft, a clamping piece is arranged on the U-shaped plate, the clamping piece comprises two symmetrically-arranged rotating discs, and the adjusting mechanism is fixedly arranged on the base. The adjusting mechanism is connected with one supporting column, and a positioning mechanism is further arranged on the base. According to the positioning and clamping device for the rear cover of the passenger car, after the rear cover of the car is clamped and fixed, the position height of the rear cover of the car can be automatically positioned and corrected.

Description

Technical Field

[0001] This utility model relates to the field of automobile assembly technology, and more specifically, to a positioning and clamping device for the rear cover of a passenger vehicle. Background Technology

[0002] Fixtures are frequently used auxiliary tools, and various fixtures are required in the automobile manufacturing process. Fixtures are specifically used in the manufacturing and processing of automobile rear covers.

[0003] In existing technologies, such as the Chinese utility model patent with publication number CN213615296U, a car rear cover clamp is disclosed. When the turntable is rotated, a threaded post rotates. The threaded post is then threadedly connected to a shaped support plate, causing the post to lift the clamp. As the post rotates, a ratchet and pawl structure is formed by the meshing of gears and limiting teeth, ensuring the post can only rotate in one direction, preventing loosening and improving accuracy and safety. However, this technical solution still has the following drawbacks: once the car rear cover is fixed in place by the clamp, rotating the turntable to drive the clamp up and down can easily scratch the surface of the rear cover, or even deform it. Therefore, it cannot be positioned and corrected manually, requiring manual positioning, which is difficult due to the weight of the rear cover. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model proposes a positioning and clamping device for the rear cover of a passenger car, which can automatically position and correct the height of the rear cover after it is clamped and fixed, so as to facilitate subsequent processing operations such as welding, drilling, and assembly without manual operation and easy to use.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This utility model provides a positioning and clamping device for the rear cover of a passenger vehicle, including a base, a clamping mechanism, an adjusting mechanism, and a positioning mechanism. The base has clamping mechanisms at both ends of its top. Each clamping mechanism includes a support column, a first motor, a first lead screw, a lifting seat, a rotating shaft, a U-shaped plate, and clamping components. The support column is mounted on the base, with a first motor at its top. The output end of the first motor is connected to a first lead screw, which is threaded onto the lead screw. The lifting seat is slidably connected to the support column. A rotating shaft is rotatably connected to the lifting seat, and a U-shaped plate is vertically fixed on the rotating shaft. A clamping component is mounted on the U-shaped plate, comprising two symmetrically arranged turntables. The adjusting mechanism is fixed on the base and connected to one of the support columns. A positioning mechanism is also provided on the base.

[0007] In a preferred embodiment of this invention, the clamping component further includes a handle, a screw, a support plate, and a guide rod. The screw is rotatably connected to the U-shaped plate, and a handle is connected to one end of the screw. A guide rod is laterally fixed on the inner side of the U-shaped plate, and two support plates are slidably connected to the guide rod. The screw is provided with two threaded sections with opposite helical directions, and the two support plates are respectively threaded to one of the threaded sections. The turntable is rotatably connected to the side of the two support plates that are close to each other.

[0008] In a preferred embodiment of this invention, a rubber pad layer is provided on the end face of the turntable.

[0009] In a preferred embodiment of this invention, the adjusting mechanism includes a second motor, a second lead screw, a sliding seat, a T-block, and a first spring. The second motor is mounted on the base, and the output end of the second motor is connected to the second lead screw. The sliding seat is threaded onto the second lead screw and is slidably connected to the base. A T-groove is provided on the top of the sliding seat, and a T-block is slidably connected inside the T-groove. Both sides of the T-block are connected to the inner sidewall of the T-groove via the first spring. The bottom end of one of the support columns is fixed to the T-block.

[0010] In a preferred embodiment of this invention, the positioning mechanism includes a third motor, a third lead screw, a slider, a diffuse reflection photoelectric sensor, and a main controller. The third motor is fixed on the base, and the output end of the third motor is connected to the third lead screw. The slider is threaded onto the third lead screw and is slidably connected to the base. A diffuse reflection photoelectric sensor is disposed on the top of the slider. The main controller is fixed on the base, and both the third motor and the diffuse reflection photoelectric sensor are electrically connected to the main controller.

[0011] In a preferred embodiment of this invention, the base is provided with shock-absorbing pads at its bottom.

[0012] The beneficial effects of this utility model are as follows:

[0013] The present invention proposes a positioning and clamping device for the rear cover of a passenger vehicle, which can automatically position and correct the height of the rear cover after it is clamped and fixed, facilitating subsequent processing operations such as welding, drilling, and assembly without manual operation and making it easy to use. Attached Figure Description

[0014] Fig. 1 This is a schematic diagram of the structure of a passenger vehicle rear cover positioning and clamping device provided in a specific embodiment of this utility model;

[0015] Fig. 2 This is a structural diagram of the clamping component;

[0016] Fig. 3 This is a cross-sectional view of the sliding seat.

[0017] In the picture:

[0018] 1. Base; 2. Clamping mechanism; 21. Support column; 22. First motor; 23. First lead screw; 24. Lifting seat; 25. Rotating shaft; 26. U-shaped plate; 27. Clamping component; 271. Turntable; 272. Handle; 273. Screw; 274. Support plate; 275. Guide rod; 276. Rubber pad; 3. Adjustment mechanism; 31. Second motor; 32. Second lead screw; 33. Sliding seat; 34. T-slot; 35. T-block; 36. First spring; 4. Positioning mechanism; 41. Third motor; 42. Third lead screw; 43. Slider; 44. Diffuse reflection photoelectric sensor; 45. Main controller; 5. Shock-absorbing pad. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] like Figs. 1-3As shown, the embodiment provides a positioning and clamping device for the rear cover of a passenger vehicle, including a base 1, a clamping mechanism 2, an adjusting mechanism 3, and a positioning mechanism 4. The clamping mechanism 2 is provided at both ends of the top of the base 1. The clamping mechanism 2 includes a support column 21, a first motor 22, a first lead screw 23, a lifting seat 24, a rotating shaft 25, a U-shaped plate 26, and a clamping member 27. The support column 21 is provided on the base 1. The first motor 22 is provided at the top of the support column 21. The output end of the first motor 22 is connected to the first lead screw 23. The lifting seat 24 is threadedly connected to the first lead screw 23, and the lifting seat 24 is slidably connected to the support column 21. The rotating shaft 25 is rotatably connected to the lifting seat 24. The U-shaped plate 26 is vertically fixed on the rotating shaft 25. The clamping member 27 is provided on the U-shaped plate 26. The clamping member 27 includes two symmetrically arranged turntables 271. The adjusting mechanism 3 is fixed on the base 1 and is connected to one of the support columns 21. The positioning mechanism 4 is also provided on the base 1. In this embodiment, the base 1 is placed on the ground, and during installation, the top surface of the base 1 should be kept horizontal. The clamping mechanism 2 is used to clamp both ends of the car rear cover, making the car rear cover vertically arranged, which facilitates subsequent processing operations such as welding, drilling, and assembly. The support column 21 has an L-shaped structure, and the bottom end of the support column 21 on the left side is fixedly installed on the base 1. The bottom end of the support column 21 on the right side is connected to the adjustment mechanism 3. The adjustment mechanism 3 is used to adjust the front and rear positions of the connected support column 21, thereby correcting the position of the car rear cover. The first lead screw 23 is arranged vertically, and the first motor 22 can drive the first lead screw 23 to rotate, thereby driving the lifting seat 24 to move up and down to adjust the height of both ends of the car rear cover, thereby correcting the bottom surface of the car rear cover. The rotating shaft 25 is vertical. A protrusion on one side of the U-shaped plate 26, located at the top of the lifting seat 24, is rotatably connected to the lifting seat 24 via a rotating shaft 25. This allows the U-shaped plate 26 to rotate adaptively when the support column 21 on the right side moves back and forth, preventing the car rear cover from bending and deforming. The rotating shaft 25 is torsionally connected to the lifting seat 24, meaning a certain force is required for the rotating shaft 25 to rotate. Two turntables 271 are located inside the U-shaped plate 26, clamping the car rear cover between them. When the lifting seat 24 moves the two ends of the car rear cover up and down, the turntables 271 rotate adaptively, preventing bending and deformation caused by inconsistent lifting speeds at both ends of the car rear cover. The clamping mechanism 2, adjusting mechanism 3, and positioning mechanism 4 are electrically connected. The positioning mechanism 4 detects and positions the clamped and fixed car rear cover, and then controls the clamping mechanism 2 and adjusting mechanism 3 to correct the position of the car rear cover when it is tilted.

[0021] Specifically, the clamping component 27 also includes a handle 272, a screw 273, a support plate 274, and a guide rod 275. The screw 273 is rotatably connected to the U-shaped plate 26, and one end of the screw 273 is connected to the handle 272. The guide rod 275 is laterally fixed on the inner side of the U-shaped plate 26, and two support plates 274 are slidably connected to the guide rod 275. The screw 273 is provided with two threaded sections with opposite helical directions, and the two support plates 274 are respectively threaded to one of the threaded sections. A turntable 271 is rotatably connected to the side of the two support plates 274 that are close to each other. In this embodiment, the handle 272 is rotatably connected to the outer wall of the U-shaped plate 26, and the operator can drive the screw 273 to rotate by rotating the handle 272. Both support plates 274 are located inside the U-shaped plate 26 and are arranged vertically. Since each support plate 274 is connected to a threaded section with opposite helical directions, the rotation of the screw 273 causes the two support plates 274 to move closer or further apart, thus enabling the two turntables 271 to clamp or release the car's rear cover. The guide rod 275 is arranged laterally to restrict the rotational freedom of the support plates 274, preventing the screw 273 from causing the support plates 274 to rotate synchronously.

[0022] Specifically, a rubber pad 276 is provided on the end face of the turntable 271. In this embodiment, the rubber pad 276 is made of rubber material, which can play a buffering role when clamping the car rear cover to avoid damaging the surface of the car rear cover.

[0023] Specifically, the adjustment mechanism 3 includes a second motor 31, a second lead screw 32, a sliding seat 33, a T-block 35, and a first spring 36. The second motor 31 is mounted on the base 1, and the output end of the second motor 31 is connected to the second lead screw 32. The sliding seat 33 is threaded onto the second lead screw 32 and is slidably connected to the base 1. A T-slot 34 is provided on the top of the sliding seat 33, and a T-block 35 is slidably connected inside the T-slot 34. Both sides of the T-block 35 are connected to the inner sidewall of the T-slot 34 through the first spring 36. The bottom end of one of the support columns 21 is fixed to the T-block 35. In this embodiment, the second lead screw 32 is horizontally positioned above the base 1, and the second motor 31 can drive the second lead screw 32 to rotate, thereby causing the sliding seat 33 to slide back and forth on the base 1. The T-slot 34 at the top of the sliding seat 33 is inverted, and the size of the T-block 35 should be smaller than the size of the T-slot 34, allowing the T-block 35 to slide left and right within the T-slot 34. This enables the distance between two adjacent U-shaped plates 26 to adapt adaptively when aligning the position of the car rear cover. Two or more first springs 36 are provided. When the T-block 35 is not subjected to external force, the first springs 36 will keep the T-block 35 at the center of the T-slot 34. When the T-block 35 is subjected to external force, it will compress the first springs 36, causing it to slide left and right. Furthermore, the rebound force of the first springs 36 should be less than the force required to drive the rotating shaft 25 to rotate, ensuring that the first springs 36 only function to drive the T-block 35 to its reset position without causing the car rear cover to tilt. The top surface of the T-block 35 is flush with the top surface of the sliding seat 33.

[0024] Specifically, the positioning mechanism 4 includes a third motor 41, a third lead screw 42, a slider 43, a diffuse reflection photoelectric sensor 44, and a main controller 45. The third motor 41 is fixed to the base 1, and the output end of the third motor 41 is connected to the third lead screw 42. The slider 43 is threaded onto the third lead screw 42 and slidably connected to the base 1. The diffuse reflection photoelectric sensor 44 is disposed on the top of the slider 43. The main controller 45 is fixed to the base 1, and both the third motor 41 and the diffuse reflection photoelectric sensor 44 are electrically connected to the main controller 45. In this embodiment, the third lead screw 42 is horizontally disposed above the base 1, and the second lead screw 32 and the third lead screw 42 are arranged perpendicularly to each other. The third motor 41 can drive the third lead screw 42 to rotate, thereby causing the slider 43 to slide left and right on the base 1. A diffuse reflection photoelectric sensor 44 is used to detect the distance between the bottom of the car rear cover and the base 1. The diffuse reflection photoelectric sensor 44 moves synchronously with the slider 43, thereby detecting the height of both ends of the bottom of the car rear cover. Adjusting the height of both ends of the bottom of the car rear cover allows for positional correction, ensuring it is level. Simultaneously, during the back-and-forth movement of one end of the car rear cover driven by the adjusting mechanism 3, the diffuse reflection photoelectric sensor 44 can also detect the lowest point of the car rear cover and use this lowest point as a reference point to locate the front-and-back position of both ends of the car rear cover, thus achieving positional correction. The main controller 45 can be a microcontroller, PLC, or other digital processor. The data detected by the diffuse reflection photoelectric sensor 44 is sent to the main controller 45 for processing. The data is compared and analyzed with the dimensions of the car rear cover built into the main controller 45, enabling accurate positional correction of the car rear cover with better results.

[0025] Specifically, the base 1 has shock-absorbing pads 5 at its bottom. In this embodiment, the shock-absorbing pads 5 are preferably made of rubber material, which can buffer ground vibrations, and the bottom surface of the shock-absorbing pads 5 is provided with anti-slip texture.

[0026] Working principle: In the initial state, slider 43 is located near the sliding seat 33. During use, the car rear cover is first hoisted above the base 1, with both ends of the rear cover positioned inside the U-shaped plate 26. Then, handle 272 is rotated, driving screw 273 to rotate. Screw 273's rotation causes the two support plates 274 to move closer together, thus clamping and fixing the two ends of the rear cover with two turntables 271. Next, the second motor 31 is started, driving the second lead screw 32 to rotate. The second lead screw 32's rotation drives the sliding seat 33 to slide back and forth, causing the right end of the rear cover to move synchronously back and forth. At this time, the diffuse reflection photoelectric sensor 44 detects the distance between the bottom surface of the rear cover and the base 1. When the lowest point of the rear cover's end is aligned with the position of the diffuse reflection photoelectric sensor 44, the second motor 31 stops working, and the third motor 41 is started simultaneously. The third motor 41 drives the third lead screw 42 to rotate, which in turn drives... The slider 43 slides left and right, thereby moving the diffuse reflection photoelectric sensor 44 to the left end of the car rear cover and detecting the distance between the left end and the base 1. By comparing the height data at both ends of the bottom of the car rear cover, the required vertical movement height of the U-shaped plate 26 at the right end is determined. At this time, the first motor 22 is started, and the first motor 22 drives the first lead screw 23 to rotate. The first lead screw 23 drives the lifting seat 24 to move up and down, thereby making the U-shaped plate 26 move up and down synchronously, so that the car rear cover is corrected to a horizontal state, thereby achieving precise positioning and correction of the car rear cover.

[0027] This utility model has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. This utility model is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are all within the protection scope of this utility model.

Claims

1. A positioning and clamping device for the rear cover of a passenger vehicle, characterized in that: The system includes a base (1), a clamping mechanism (2), an adjusting mechanism (3), and a positioning mechanism (4). The base (1) has clamping mechanisms (2) at both ends of its top. Each clamping mechanism (2) includes a support column (21), a first motor (22), a first lead screw (23), a lifting seat (24), a rotating shaft (25), a U-shaped plate (26), and a clamping element (27). The support column (21) is mounted on the base (1). The first motor (22) is mounted at the top of the support column (21). The output end of the first motor (22) is connected to the first lead screw (23). A lifting seat (24) is threaded onto the lead screw (23), and the lifting seat (24) is slidably connected to the support column (21). A rotating shaft (25) is rotatably connected to the lifting seat (24), and a U-shaped plate (26) is vertically fixed on the rotating shaft (25). A clamping member (27) is provided on the U-shaped plate (26), and the clamping member (27) includes two symmetrically arranged turntables (271). An adjusting mechanism (3) is fixed on the base (1), and the adjusting mechanism (3) is connected to one of the support columns (21). A positioning mechanism (4) is also provided on the base (1).

2. The passenger vehicle rear cover positioning and clamping device according to claim 1, characterized in that: The clamping component (27) further includes a handle (272), a screw (273), a support plate (274), and a guide rod (275). The screw (273) is rotatably connected to the U-shaped plate (26). One end of the screw (273) is connected to the handle (272). The guide rod (275) is laterally fixed on the inner side of the U-shaped plate (26). Two support plates (274) are slidably connected to the guide rod (275). The screw (273) is provided with two threaded sections with opposite helical directions. The two support plates (274) are respectively threaded to one of the threaded sections. The turntable (271) is rotatably connected to the side of the two support plates (274) that are close to each other.

3. The passenger vehicle rear cover positioning and clamping device according to claim 2, characterized in that: A rubber pad layer (276) is provided on the end face of the turntable (271).

4. The passenger vehicle rear cover positioning and clamping device according to claim 1, characterized in that: The adjustment mechanism (3) includes a second motor (31), a second lead screw (32), a sliding seat (33), a T-block (35), and a first spring (36). The second motor (31) is provided on the base (1). The output end of the second motor (31) is connected to the second lead screw (32). The sliding seat (33) is threadedly connected to the second lead screw (32), and the sliding seat (33) is slidably connected to the base (1). The top of the sliding seat (33) is provided with a T-slot (34). The T-block (35) is slidably connected in the T-slot (34), and both sides of the T-block (35) are connected to the inner sidewall of the T-slot (34) through the first spring (36). The bottom end of one of the support columns (21) is fixed on the T-block (35).

5. The passenger vehicle rear cover positioning and clamping device according to claim 1, characterized in that: The positioning mechanism (4) includes a third motor (41), a third lead screw (42), a slider (43), a diffuse reflection photoelectric sensor (44), and a main controller (45). The third motor (41) is fixed on the base (1). The output end of the third motor (41) is connected to the third lead screw (42). The slider (43) is threaded on the third lead screw (42) and is slidably connected to the base (1). The top of the slider (43) is provided with a diffuse reflection photoelectric sensor (44). The main controller (45) is fixed on the base (1). The third motor (41) and the diffuse reflection photoelectric sensor (44) are both electrically connected to the main controller (45).

6. The passenger vehicle rear cover positioning and clamping device according to claim 1, characterized in that: The base (1) is provided with shock-absorbing pads (5) at the bottom.

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