Locking mechanism of automobile body welding fixture

Abstract

The utility model relates to the technical field of welding fixtures, in particular to an automobile body welding fixture locking mechanism which comprises a bottom plate and a frame plate, the upper side of the frame plate is fixedly connected with two side plates which are symmetrically distributed, a double-end lead screw is rotationally installed between the two side plates, the outer surface of the double-end lead screw is in threaded connection with two transverse plates which are symmetrically distributed, and the transverse plates are in threaded connection with the bottom plate. By means of opposite movement or relative movement of the two transverse plates, the four clamping round seats can synchronously adjust the clamping positions so as to adapt to automobile bodies of different width sizes, then the four electric push rods synchronously drive the four clamping round seats to be adjusted in a telescopic mode, and the clamping positions of the four clamping round seats can be adjusted in a telescopic mode. The locking mechanism of the welding fixture is used for adaptively clamping automobile bodies with different lengths and sizes and ensuring the stability of the automobile bodies, so that the automobile bodies with different sizes can be flexibly and conveniently locked without worrying that the welding position is shielded, and the applicability of the locking mechanism of the welding fixture is improved.

Description

Technical Field

[0001] This utility model relates to the field of welding fixture technology, specifically a locking mechanism for automotive body welding fixtures. Background Technology

[0002] The primary function of welding fixtures is to fix the workpiece in place and prevent it from moving or deforming during the welding process. Vibrations generated during welding can easily cause the workpiece to move. Welding fixtures can effectively avoid this problem, ensure the accuracy and consistency of the weld, and improve product quality.

[0003] The prior art discloses patent application number "CN202320654060.X", which discloses a welding fixture locking structure, including an upper fixture and a lower fixture. The upper fixture has a locking component on its front side. The locking component includes a concave mounting block fixedly installed on the front side of the lower fixture. A connecting block is fixedly installed on the front side of the upper fixture and slidably connected to the inside of the concave mounting block. Two threaded sleeves are rotatably connected to the inner top wall of the connecting block. Two threaded rods are threadedly connected inside the two threaded sleeves.

[0004] The welding fixture locking structure can only quickly lock and unlock the upper and lower clamps. However, in actual use, the welding fixture locking mechanism can usually only position the car body flat or clamp it to a certain part of the car body. This fixing method has limitations, which leads to the welding position being blocked. At the same time, it cannot position car bodies of different sizes, thus affecting the applicability of the welding fixture locking mechanism and making it inconvenient to use. Utility Model Content

[0005] The purpose of this utility model is to provide a locking mechanism for automotive body welding fixtures to solve the problems mentioned in the background art.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A locking mechanism for a car body welding fixture includes a base plate and a frame plate. Two symmetrically distributed side plates are fixedly connected to the upper side of the frame plate. A double-ended lead screw is rotatably installed between the two side plates. Two symmetrically distributed horizontal plates are threaded to the outer surface of the double-ended lead screw. Electric push rods are fixed at both ends of the two horizontal plates.

[0008] Each of the four electric push rods has a clamping round seat fixed on one side for clamping the car body. Four U-shaped seats are fixedly connected inside the frame plate. The clamping round seats are slidably placed inside the U-shaped seats. A round rod two is fixedly installed between the two side plates. The outer surface of the round rod two is slidably connected to the inside of the cross plate.

[0009] Preferably, a mounting frame is fixedly connected to the upper side of the base plate, and a first lead screw and a second lead screw are symmetrically distributed and rotatably connected inside the mounting frame. The outer surfaces of the first lead screw and the second lead screw are threaded with lifting blocks, and one side of the two lifting blocks is fastened to both ends of the frame plate.

[0010] Preferably, the mounting frame has two symmetrically distributed round rods fixedly connected inside, with one side of the first lead screw and the second lead screw both penetrating the mounting frame and extending to the bottom of the mounting frame.

[0011] Preferably, a driven bevel gear is fixedly connected to one side of both the first and second lead screws, two fixed plates are fixedly connected to the upper side of the base plate, and a rotating shaft is rotatably connected between the two fixed plates. Two driving bevel gears for meshing with the driven bevel gear are fixedly connected to the outer surface of the rotating shaft, and a servo motor is fixedly connected to one side of the fixed plate. The output shaft of the servo motor is fastened to the rotating shaft.

[0012] Preferably, two sliders are fixedly connected to both ends of the frame plate, and four vertical seats are fixedly connected to the upper side of the base plate, with one side of the slider sliding inside the vertical seat.

[0013] Preferably, a servo motor is fixedly installed on one side of the side plate, and the output shaft of the servo motor is fastened to a double-ended lead screw.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model allows four clamping round seats to be adjusted synchronously to accommodate car bodies of different widths by moving two horizontal plates in opposite directions or relative to each other. Then, four electric push rods synchronously drive the four clamping round seats to extend and retract, so that the four clamping round seats can accommodate car bodies of different lengths. The four clamping round seats can form a welding fixture locking mechanism to lock the car body and ensure the stability of the car body. This allows for flexible and convenient locking of car bodies of different sizes, without worrying about the welding position being blocked, thus improving the applicability of the welding fixture locking mechanism.

[0016] 2. This utility model utilizes two lifting blocks on the first and second lead screws to move the frame plate upwards, thereby raising the locked car body to a higher position. This facilitates welding work on the bottom of the car body, improving the flexibility of subsequent welding. At the same time, as the frame plate moves, the four sliders can move inside the four vertical seats, allowing the car body to be raised and lowered stably and reliably, thus improving the safety of the welding fixture locking mechanism during use. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a utility model Figure 1 Installation diagram of the electric actuator and clamping base;

[0020] Figure 3 This is a utility model Figure 2 Installation diagram of the vertical seat and slider;

[0021] Figure 4 This is a utility model Figure 1 A schematic diagram of the installation of the first and second lead screws and the frame plate;

[0022] Figure 5 This is a utility model Figure 1 Schematic diagram of the driven bevel gear and the driving bevel gear;

[0023] The attached figures are labeled as follows:

[0024] 1. Base plate; 2. Mounting bracket; 3. First lead screw; 4. Second lead screw; 5. Lifting block; 6. Frame plate; 7. Side plate; 8. Double-ended lead screw; 9. Horizontal plate; 10. Electric push rod; 11. Round rod one; 12. U-shaped seat; 13. Clamping round seat; 14. Round rod two; 15. Slider; 16. Vertical seat; 17. Driven bevel gear; 18. Fixed plate; 19. Rotating shaft; 20. Driving bevel gear. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1 to 5As shown, a locking mechanism for a car body welding fixture includes a base plate 1 and a frame plate 6. Two symmetrically distributed side plates 7 are fixedly connected to the upper side of the frame plate 6. A double-ended lead screw 8 is rotatably installed between the two side plates 7. Two symmetrically distributed horizontal plates 9 are threadedly connected to the outer surface of the double-ended lead screw 8. Electric push rods 10 are fixedly provided at both ends of the two horizontal plates 9. The electric push rods 10 are of model HB-DJ801.

[0027] Each of the four electric push rods 10 has a clamping round seat 13 fixedly installed on one side for clamping the car body. Four U-shaped seats 12 are fixedly connected inside the frame plate 6. The clamping round seat 13 is slidably placed inside the U-shaped seat 12. Through the installation and use of the U-shaped seat 12 and the clamping round seat 13, the clamping round seat 13 can be inside the U-shaped seat 12, so that the clamping round seat 13 can be stably adjusted and moved, so that the clamping round seat 13 can clamp the car body more firmly. A round rod 2 14 is fixedly installed between the two side plates 7. The outer surface of the round rod 2 14 is slidably connected to the inside of the horizontal plate 9. The round rod 2 14 can guide the movement trajectory of the two horizontal plates 9, so that the two horizontal plates 9 can be adjusted smoothly to clamp car bodies of different sizes.

[0028] A mounting bracket 2 is fixedly connected to the upper side of the base plate 1. A first lead screw 3 and a second lead screw 4 are symmetrically distributed and rotatably connected inside the mounting bracket 2. Lifting blocks 5 are threadedly connected to the outer surfaces of the first lead screw 3 and the second lead screw 4. One side of the two lifting blocks 5 is fastened to both ends of the frame plate 6.

[0029] The mounting frame 2 has two symmetrically distributed round rods 11 fixedly connected inside. The lifting block 5 can slide and adjust at the round rods 11 to guide the movement trajectory of the lifting block 5 and the frame plate 6, so that the frame plate 6 can move up and down smoothly. One side of the first lead screw 3 and the second lead screw 4 both pass through the mounting frame 2 and extend to the bottom of the mounting frame 2.

[0030] A driven bevel gear 17 is fixedly connected to one side of both the first lead screw 3 and the second lead screw 4. Two fixed plates 18 are fixedly connected to the upper side of the base plate 1. A rotating shaft 19 is rotatably connected between the two fixed plates 18. Two driving bevel gears 20 for meshing with the driven bevel gear 17 are fixedly connected to the outer surface of the rotating shaft 19. A servo motor is fixedly connected to one side of the fixed plate 18. The output shaft of the servo motor is fastened to the rotating shaft 19.

[0031] Two sliders 15 are fixedly connected to both ends of the frame plate 6. Four vertical seats 16 are fixedly connected to the upper side of the base plate 1. One side of the slider 15 is slidably placed inside the vertical seat 16. The slider 15 can slide inside the vertical seat 16, so that the car on the entire frame plate 6 can move up and down smoothly, making it less likely for the car body to shake when it is raised or lowered.

[0032] A servo motor is fixedly installed on one side of the side plate 7. The two servo motors are model SMBL-60P, and the output shafts of the servo motors are fastened to the double-ended lead screw 8.

[0033] The working principle of the automotive body welding fixture locking mechanism provided by this utility model is as follows:

[0034] By driving the double-ended lead screw 8 to rotate through the output shaft of the servo motor, the two horizontal plates 9 on the double-ended lead screw 8 can move towards each other or relative to each other, so that the four clamping round seats 13 can be adjusted synchronously to adapt to car bodies of different widths. Then, the four electric push rods 10 synchronously drive the four clamping round seats 13 to extend and retract, so that the four clamping round seats 13 can be adapted to clamp car bodies of different lengths. The four clamping round seats 13 can form a welding fixture locking mechanism. Then, the car body is lifted onto the four clamping round seats 13. At this time, the four clamping round seats 13 are adapted to and positioned at the wheel hub mounting position of the car body to ensure the stability of the car body. This allows for flexible and convenient locking of car bodies of different sizes, without worrying about the welding position being blocked, thus improving the applicability of the welding fixture locking mechanism.

[0035] By driving the rotating shaft 19 to rotate through the output shaft of the servo motor, the two active bevel gears 20 on the rotating shaft 19 can drive the two meshing driven bevel gears 17 to rotate, which in turn drives the first lead screw 3 and the second lead screw 4 to rotate together. At this time, the two lifting blocks 5 on the first lead screw 3 and the second lead screw 4 can move the frame plate 6 upward to raise the locked car body to a higher position, which facilitates welding work on the bottom of the car body and improves the flexibility of subsequent welding. At the same time, as the frame plate 6 moves, the four sliders 15 can move inside the four vertical seats 16, so that the car body can be lifted and adjusted stably and reliably, improving the safety of the welding fixture locking mechanism during use.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A locking mechanism for an automotive body welding fixture, comprising a base plate (1) and a frame plate (6), characterized in that: The upper side of the frame plate (6) is fixedly connected to two symmetrically distributed side plates (7), and a double-headed screw (8) is rotatably installed between the two side plates (7). The outer surface of the double-headed screw (8) is threaded with two symmetrically distributed horizontal plates (9), and electric push rods (10) are fixedly provided at both ends of the two horizontal plates (9). Each of the four electric push rods (10) is fixedly provided with a clamping round seat (13) for clamping the car body. The frame plate (6) is fixedly connected with four U-shaped seats (12). The clamping round seat (13) is slidably placed inside the U-shaped seat (12). A round rod two (14) is fixedly installed between the two side plates (7). The outer surface of the round rod two (14) is slidably connected to the inside of the cross plate (9).

2. The locking mechanism for an automotive body welding fixture according to claim 1, characterized in that, A mounting bracket (2) is fixedly connected to the upper side of the base plate (1). A first lead screw (3) and a second lead screw (4) are symmetrically distributed inside the mounting bracket (2). Lifting blocks (5) are threadedly connected to the outer surfaces of the first lead screw (3) and the second lead screw (4). One side of the two lifting blocks (5) is fastened to both ends of the frame plate (6).

3. The locking mechanism for an automotive body welding fixture according to claim 2, characterized in that, The mounting bracket (2) has two symmetrically distributed round rods (11) fixedly connected inside. One side of the first lead screw (3) and the second lead screw (4) both penetrate the mounting bracket (2) and extend to the bottom of the mounting bracket (2).

4. The locking mechanism for an automotive body welding fixture according to claim 3, characterized in that, A driven bevel gear (17) is fixedly connected to one side of the first lead screw (3) and the second lead screw (4). Two fixed plates (18) are fixedly connected to the upper side of the base plate (1). A rotating shaft (19) is rotatably connected between the two fixed plates (18). Two driving bevel gears (20) for meshing with the driven bevel gear (17) are fixedly connected to the outer surface of the rotating shaft (19). A servo motor is fixedly connected to one side of the fixed plate (18). The output shaft of the servo motor is fastened to the rotating shaft (19).

5. The locking mechanism for an automotive body welding fixture according to claim 1, characterized in that, Two sliders (15) are fixedly connected to both ends of the frame plate (6), and four vertical seats (16) are fixedly connected to the upper side of the base plate (1). One side of the slider (15) is slidably placed inside the vertical seat (16).

6. The locking mechanism for an automotive body welding fixture according to claim 1, characterized in that, A servo motor is fixedly installed on one side of the side plate (7), and the output shaft of the servo motor is fastened to the double-ended lead screw (8).

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