A welding and fixing device for preventing automobile hinge from loosening

Abstract

The present invention relates to the technical field of automotive parts processing, and more specifically, to a welding and fixing device for preventing automobile hinges from loosening. It comprises a base, and a rotating plate rotatably arranged on the top of the base, and the two ends of the rotating plate correspond to the welding area and the loading and unloading areas respectively; a hinge fixing part for placing the hinge is slidably arranged on the top of the rotating plate, and the hinge fixing part comprises two plug-in columns that can be inserted into the hinge mounting hole; in the welding and fixing device for preventing automobile hinges from loosening, the center of gravity of the rotating plate is changed by adjusting the position of the magnet counterweight block, so that the rotating plate is rotated to guide the movement of the hinge fixing part, and the position switching of the hinge between the welding area and the loading and unloading area is realized. In addition, the magnet counterweight block can also drive the plug-in column during the movement, so as to realize the fixing of the hinge while guiding the movement of the hinge, and also realize the movement and fixing of the hinge without affecting the welding gun.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle accessories processing, in particular to a vehicle hinge anti-loosening welding and fixing device. Background Art

[0002] Automobile hinges are one of the commonly used accessories on automobiles. They are usually installed on the doors or compartments of automobiles. Automobile hinges generally include two hinge bodies and a hinge pin for connecting the two hinge bodies to form a rotational connection. Figure 7 As shown, both hinge bodies have hinge holes, and the hinge holes have unclosed gaps. When the hinge is assembled, the hinge holes on the two hinge bodies are connected together, and then the hinge pin is inserted into the hinge hole from the opening, and then welding is performed at the unclosed gap, so that the hinge pin and a hinge body are welded together.

[0003] At present, intelligent welding equipment is usually used for welding, which allows workers to simply place the spliced ​​hinges under the intelligent welding equipment. In order to improve the safety of the welding process, it is avoided to fix the hinges manually.

[0004] In the related art, for example, a Chinese patent with the publication number CN118046126B discloses a welding positioning device for automobile hinge processing. The patent tightens and fixes the hinge by utilizing the force during the downward movement of the welding gun. However, the welding gun needs to move frequently during the welding process, and the setting of a push plate on the moving path of the welding gun can easily affect the normal operation of the welding chamber, thereby affecting the quality and efficiency of welding. Summary of the invention

[0005] The purpose of the present invention is to provide a welding and fixing device for preventing automobile hinges from loosening, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above purpose, a vehicle hinge anti-loosening welding and fixing device is provided, comprising a base, and a rotating plate rotatably arranged on the top of the base, wherein the two ends of the rotating plate correspond to the welding area and the loading and unloading area respectively;

[0007] A hinge fixing piece for placing a hinge is slidably disposed on the top of the rotating plate, and the hinge fixing piece includes two plug posts that can be inserted into the hinge mounting holes;

[0008] A magnet counterweight is slidably disposed at the bottom of the rotating plate, and the rotating plate is tilted accordingly by adjusting the position of the magnet counterweight at the bottom of the rotating plate, and the speed of adjusting the position of the magnet counterweight is less than the sliding speed of the hinge fixing member at the top of the rotating plate;

[0009] When the rotating plate is tilted toward the welding area, the magnet counterweight drives the plug posts in the welding area during the position adjustment process, forcing the two plug posts to tighten and fix the hinge.

[0010] As a further improvement of the technical solution, two symmetrical vertical plates are arranged on the top of the base, and rotating shafts are rotatably arranged on the two vertical plates, and the rotating shafts are fixed on both sides of the rotating plates.

[0011] As a further improvement of the technical solution, the hinge fixing member includes a bearing plate slidably arranged on the top of the rotating plate;

[0012] The two plug posts are respectively located at two ends of the top of the load-bearing plate, and one of the plug posts is fixedly connected to the load-bearing plate, and the other is slidably connected to the load-bearing plate;

[0013] A pull rod is fixedly provided at the bottom of the plug post which is slidably connected to the bearing plate;

[0014] Both ends of the top of the rotating plate are provided with stoppers for blocking the carrying plate.

[0015] As a further improvement of the technical solution, the sliding direction of the plug post and the pull rod is consistent with the sliding direction of the bearing plate.

[0016] As a further improvement of the technical solution, the rotating plate is a shell having a hollow interior and an opening at the bottom;

[0017] The magnet counterweight block is slidably arranged inside the rotating plate;

[0018] An electromagnet is provided at one end of the rotating plate to attract and repel the magnet counterweight block so as to adjust the position of the magnet counterweight block at the bottom of the rotating plate;

[0019] The electromagnet is arranged at one end of the rotating plate located in the welding area.

[0020] As a further improvement of the technical solution, a sliding rod is provided on the magnet counterweight block, and the top end of the sliding rod passes through the top of the rotating plate and then extends to the path of movement of the pull rod.

[0021] As a further improvement of the technical solution, the sliding rod longitudinally penetrates the magnet counterweight block and is slidably connected to the magnet counterweight block. Under normal conditions, the sliding rod slides down by its own gravity to escape from the moving path of the pull rod.

[0022] A baffle is provided at the opening at the bottom of the rotating plate. The baffle is located at one end of the rotating plate in the welding area, and one end of the baffle toward the middle of the rotating plate is bent downward to form a bent end for driving the sliding rod to move upward, so that the sliding rod re-enters the moving path of the pull rod under the drive of the bent end;

[0023] The overall speed at which the magnet counterweight moves to the electromagnet is slower than the overall speed at which the bearing plate moves to the electromagnet.

[0024] As a further improvement of the technical solution, the opening at the bottom of the rotating plate corresponding to the baffle is blocked by the baffle, so that a buffer cavity with an entrance is formed at the top of the baffle;

[0025] The side wall of the rotating plate is provided with a one-way exhaust valve and a one-way air inlet valve connected to the buffer chamber. The one-way exhaust valve limits the exhaust speed of the gas in the buffer chamber so that the overall speed of the magnet counterweight moving to the electromagnet is slower than the overall speed of the supporting plate moving to the electromagnet.

[0026] As a further improvement of the technical solution, the bearing plate is parallel to the rotating plate.

[0027] As a further improvement of the technical solution, after the rotating plate is tilted toward the welding area, the supporting plate is in a horizontal state.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. In the automobile hinge anti-loosening welding fixture, the center of gravity of the rotating plate is changed by adjusting the position of the magnet counterweight, so that the rotating plate rotates to guide the movement of the hinge fixing part, and the position of the hinge between the welding area and the loading and unloading area is switched. In addition, the magnet counterweight can also drive the plug during the movement, so as to guide the movement of the hinge while fixing the hinge, and also realize the movement and fixation of the hinge without affecting the welding gun.

[0030] 2. In the automobile hinge anti-loosening welding fixture, the inclination of the rotating plate can not only guide the bearing plate to move, but also change the welding angle of the hinge so that the gap of the hinge faces upward, so that the welding fixture can adapt to different types of welding machines.

[0031] 3. In the automobile hinge anti-loosening welding fixing device, the rotating plate can brush off the welding slag generated during the welding process during the turning process, so as to avoid the influence of a large amount of welding slag on the bearing plate on the welding fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 It is a structural schematic diagram of the magnet counterweight block of the present invention;

[0034] Figure 3 It is a structural schematic diagram of the hinge fixing member of the present invention;

[0035] Figure 4A schematic diagram of the movement speed of the magnet counterweight of the present invention;

[0036] Figure 5 It is a structural schematic diagram of the sliding rod of the present invention;

[0037] Figure 6 It is a schematic diagram of the motion state of the sliding rod of the present invention;

[0038] Figure 7 It is a structural schematic diagram of the hinge of the present invention;

[0039] Figure 8 Schematic diagram of welding state of welding gun of the present invention Figure 1 ;

[0040] Fig. 9 Schematic diagram of welding state of welding gun of the present invention Figure 2 .

[0041] The meaning of each number in the figure is:

[0042] 100. Base; 101. Welding area; 102. Loading and unloading area; 110. Turntable; 111. Rotating shaft; 112. Magnet counterweight; 113. Electromagnet; 114. Baffle; 115. Bending end; 116. Buffer chamber; 120. Hinge fixing; 121. Loading plate; 122. Insert column; 123. Pull rod; 124. Slide groove; 125. Limit column; 130. Sliding rod; 131. Empty groove; 132. One-way exhaust valve; 133. One-way air intake valve; 200. Welding gun. DETAILED DESCRIPTION

[0043] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The present invention provides a welding and fixing device for preventing automobile hinges from loosening, such as Figure 1 As shown, the base 100 includes a base 100 and a rotating plate 110 rotatably arranged on the top of the base 100. The base 100 can be a bottom plate or a workbench, which will not be described in detail in the present invention. Two symmetrical vertical plates are arranged on the top of the base 100, and the two vertical plates are rotatably arranged with a rotating shaft 111. By fixing the rotating shaft 111 on both sides of the rotating plate 110, the rotating plate 110 can be rotated on the top of the base 100. Here, the rotating shaft 111 is preferably located at the center of the side of the rotating plate 110. For details, please refer to Figure 1 The position of the rotating shaft 111.

[0045] A slide rail is provided on the top of the rotating plate 110, and the slide rail is provided along the radial direction of the rotating shaft 111. The hinge fixing member 120 slides on the top of the rotating plate 110 through the slide rail. It should be understood that the slide rail is a kind of sliding component, and its purpose is to realize the sliding of the hinge fixing member 120 on the top of the rotating plate 110 and to limit the hinge fixing member 120 (that is, to limit the hinge fixing member 120 to slide along the radial direction of the rotating shaft 111). Therefore, any sliding component that can achieve the same effect as the slide rail can be provided on the top of the rotating plate 110.

[0046] When the hinge fixing part 120 slides from one end of the rotating plate 110 to the other end, the position of the hinge fixing part 120 changes. Therefore, the two ends of the rotating plate 110 are divided into two areas with the rotating shaft 111 as the dividing line, and the direction of the dividing line is the same as the axial direction of the rotating shaft 111, specifically, the welding area 101 and the loading and unloading area 102 (referring to loading and unloading).

[0047] Here, the staff only needs to be near the loading and unloading area 102. When the hinge fixing part 120 is in the loading and unloading area 102, the staff removes the hinge from the hinge fixing part 120 or puts the hinge on the hinge fixing part 120, and then moves the hinge fixing part 120 to the welding area 101 by rotating the rotating plate 110, thereby improving the safety of the operation.

[0048] refer to Figure 3 The hinge fixing member 120 includes two plug posts 122 that can be inserted into the hinge mounting holes.

[0049] like Figure 2 As shown, a magnet counterweight 112 is slidingly provided at the bottom of the rotating plate 110. By adjusting the position of the magnet counterweight 112 at the bottom of the rotating plate 110, the rotating plate 110 is tilted accordingly, and the speed of adjusting the position of the magnet counterweight 112 is lower than the sliding speed of the hinge fixing part 120 at the top of the rotating plate 110; when the rotating plate 110 tilts toward the welding area 101, the magnet counterweight 112 drives the pins 122 in the welding area 101 during the position adjustment process, forcing the two pins 122 to tighten and fix the hinge.

[0050] Figure 3The specific structure of the hinge fixing member 120 is shown. As shown in the figure, the hinge fixing member 120 includes a bearing plate 121, and a slide matched with the slide rail is arranged at the bottom of the bearing plate 121, so that the bearing plate 121 can slide on the top of the rotating plate 110 through the slide and the slide rail. Two plug posts 122 are respectively located at the two ends of the top of the bearing plate 121, and one of the plug posts 122 is fixedly connected to the bearing plate 121, and the other is slidably connected to the bearing plate 121. Specifically, a pull rod 123 is fixedly arranged at the bottom of the plug post 122 slidably connected to the bearing plate 121, and the pull rod 123 is slidably arranged in a slide groove 124 arranged on the side wall of the bearing plate 121. In order to prevent the pull rod 123 from rotating during the sliding process, a limit column 125 is also fixedly arranged on the top of the pull rod 123, and the limit column 125 passes through the top of the bearing plate 121 and is slidably connected to the bearing plate 121. In addition, both ends of the top of the rotating plate 110 are provided with stoppers for blocking the carrying plate 121 to prevent the carrying plate 121 from being separated from the rotating plate 110 .

[0051] The sliding direction of the pin 122 and the pull rod 123 is consistent with the sliding direction of the carrier plate 121. In this way, the staff only needs to place the assembled hinge on the top of the carrier plate 121 and insert the two pins 122 into the hinge bodies on both sides. Then, the pins 122 are driven by the magnet counterweight 112 to fix the hinge.

[0052] like Figure 2 As shown, the rotating plate 110 is a shell with a hollow interior and an opening at the bottom, and the bottom end of the rotating plate 110 is bent toward the inside of the rotating plate 110 to form a support portion for supporting the magnet counterweight 112. In addition, the magnet counterweight 112 is slidably arranged inside the rotating plate 110, so that due to the support of the support portion, the magnet counterweight 112 will not fall through the opening at the bottom of the rotating plate 110. At the same time, the present invention also sets an electromagnet 113 at one end inside the rotating plate 110. In this embodiment, the electromagnet 113 is set at one end of the rotating plate 110 located in the welding area 101. Using the principle that like repels like and opposites attract, the magnet counterweight 112 is attracted and repelled by controlling the change of the N level and S level of the electromagnet 113, so that the position of the magnet counterweight 112 at the bottom of the rotating plate 110 is adjusted by the electromagnet 113.

[0053] Moreover, Figure 4 and Figure 5 As shown, a sliding rod 130 is provided on the magnet counterweight 112, the top end of the sliding rod 130 passes through the top of the rotating plate 110, and then extends to the moving path of the pull rod 123. The part of the rotating plate 110 penetrated by the sliding rod 130 is provided with an empty groove 131 for the sliding rod 130 to slide. Figure 2 and Figure 5The electromagnet 113 is then controlled to attract the magnet counterweight 112, at which point the magnet counterweight 112 moves to drive the sliding rod 130, the sliding rod 130 moves to drive the pull rod 123, the pull rod 123 moves to drive the bearing plate 121, so that the bearing plate 121 drives the hinge to move to one end of the rotating plate 110 located in the welding area 101, and then the stopper blocks the movement of the bearing plate 121, and the magnet counterweight 112 continues to drive the pull rod 123 to move, so that the distance between the two pins 122 becomes larger, thereby clamping the hinge.

[0054] However, this requires that the sliding rod 130 is always behind the pull rod 123 (i.e., the sliding rod 130 is closer to the end of the rotating plate 110 located in the loading and unloading area 102 than the pull rod 123), which leads to a disadvantage during operation. Specifically, the electromagnet 113 attracts the magnet counterweight 112 at a faster speed, so that when the magnet counterweight 112 is driven by the sliding rod 130 to push the pull rod 123 to move, the supporting plate 121 will quickly hit the block at one end of the rotating plate 110 located in the welding area 101. Since the impact force is too large, it affects the state of the hinge.

[0055] In view of this, in some embodiments, the sliding rod 130 longitudinally penetrates the magnet counterweight block 112 and is slidably connected to the magnet counterweight block 112. Under normal conditions, the sliding rod 130 slides down by its own gravity to escape from the moving path of the pull rod 123. Figure 6 As shown in the upper half of the figure, in the two dotted lines, the height of the pull rod 123 corresponds to the upper dotted line, and the height of the sliding rod 130 corresponds to the lower dotted line. In this state, the sliding rod 130 moves without contacting the pull rod 123.

[0056] Here, the top end of the sliding rod 130 is thick and the bottom end is thin, so as to prevent the sliding rod 130 from sliding off the magnet counterweight 112 .

[0057] Then, if Figure 2 As described above, a baffle 114 is provided at the opening at the bottom of the rotating plate 110, and the baffle 114 is located at one end of the rotating plate 110 located in the welding area 101. Figure 4 As shown, one end of the baffle plate 114 toward the middle of the rotating plate 110 is bent downward to form a bent end 115 for driving the sliding rod 130 to move upward, so that the sliding rod 130 re-enters the moving path of the pull rod 123 under the drive of the bent end 115. Figure 6 As shown in the lower half of the figure, after being driven by the bent end 115, the height of the sliding rod 130 is increased, so that the pull rod 123 can be subsequently driven.

[0058] Since the electromagnet 113 will first attract the magnet counterweight 112 when it is working, when the magnet counterweight 112 moves to one end of the rotating plate 110, the magnet counterweight 112 presses the rotating plate 110 to tilt, and the supporting plate 121 moves downward (i.e., to the end of the rotating plate 110 located in the welding area 101). In other words, the magnet counterweight 112 is in front of the supporting plate 121 (i.e., the magnet counterweight 112 is closer to the electromagnet 113 than the supporting plate 121), and to push the pull rod 123, the magnet counterweight 112 needs to be behind the supporting plate 121. To this end, the present invention provides the following two solutions:

[0059] First, the electromagnet 113 is controlled to repel the magnet counterweight 112 when the magnet counterweight 112 moves to the bent end 115, so that when the carrier plate 121 exceeds the magnet counterweight 112, the electromagnet 113 is controlled to attract the magnet counterweight 112. In this way, the overall speed of the magnet counterweight 112 moving to the electromagnet 113 is slower than the overall speed of the carrier plate 121 moving to the electromagnet 113.

[0060] Second, by setting the volume of the baffle 114 to correspond to the area of ​​the bottom opening of the rotating plate 110, that is, the opening at the bottom of the rotating plate 110 corresponding to the baffle 114 is blocked by the baffle 114, so that a buffer chamber 116 with only an entrance is formed on the top of the baffle 114. In this way, when one end of the magnet counterweight 112 moves into the buffer chamber 116, the magnet counterweight 112 blocks the entrance, and the air in the buffer chamber 116 cannot be discharged at this time, thereby achieving the deceleration of the magnet counterweight 112. In addition, the side wall of the rotating plate 110 is also provided with a one-way exhaust valve 132 and a one-way air intake valve 133 connected to the buffer chamber 116. In this way, after the magnet counterweight 112 enters the buffer chamber 116, the gas in the buffer chamber 116 can only be slowly discharged through the one-way exhaust valve 132, thereby limiting the moving speed of the magnet counterweight 112. At the same time, the ventilation flow rate of the one-way air intake valve 133 is greater than the ventilation flow rate of the one-way air exhaust valve 132 , so that the supporting plate 121 can be quickly separated from the magnet counterweight block 112 .

[0061] When the welding fixture of the present invention is used, first Figure 1 As shown, the magnet counterweight 112 is repelled by the electromagnet 113, so that the magnet counterweight 112 moves to the end of the rotating plate 110 located in the loading and unloading area 102. At this time, the magnet counterweight 112 presses the rotating plate 110 to tilt toward the loading and unloading area 102, and the bearing plate 121 slides to the end of the rotating plate 110 located in the loading and unloading area 102. Then, the staff puts the assembled hinge on the top of the bearing plate 121 and inserts the two plug posts 122 into the corresponding mounting holes.

[0062] Then, the electromagnet 113 is controlled to generate suction force on the magnet counterweight 112, forcing the support plate 121 to move toward the electromagnet 113. When the magnet counterweight 112 passes the rotating shaft 111, the center of gravity of the rotating plate 110 changes, so that the rotating plate 110 tilts toward the welding area 101, and the support plate 121 begins to slide toward the welding area 101. When the magnet counterweight 112 moves to the entrance of the buffer chamber 116, the magnet counterweight 112 seals the buffer chamber 116. At this time, the gas in the buffer chamber 116 can only be slowly discharged through the one-way exhaust valve 132 to limit the speed of the magnet counterweight 112. Figure 6 As shown in the upper part of FIG. 1 , during the limiting process, the bearing plate 121 exceeds the magnet counterweight 112 and first moves to the stopper at the end of the rotating plate 110. Then, as shown in FIG. Figure 6 As shown in the lower half of the figure, when the bottom end of the sliding rod 130 contacts the bent end 115, the bent end 115 drives the sliding rod 130 upward, and then as the supporting plate 121 moves, the supporting plate 121 drives the upward sliding rod 130 to push the pull rod 123. Since the supporting plate 121 is blocked by the block, the sliding rod 130 can push the pull rod 123 at this time, and the pull rod 123 drives the plug post 122 to move, and the distance between the two plug posts 122 becomes farther, so as to tighten and fix the hinge.

[0063] For easier understanding, refer to Figure 4 , the speed V1 of the magnet counterweight 112 is greater than the speed V2, and at the same time, the support plate 121 exceeds the support plate 121 when the magnet counterweight 112 is between the speed V1 and the speed V2.

[0064] That is, by adjusting the position of the magnet counterweight 112 to change the center of gravity of the rotating plate 110, the rotating plate 110 is rotated to guide the movement of the hinge fixing member 120, so as to achieve the switching of the position of the hinge between the welding area 101 and the loading and unloading area 102. In addition, the magnet counterweight 112 can also drive the plug 122 during the movement, so as to achieve the fixing of the hinge while guiding the movement of the hinge, and also achieve the movement and fixing of the hinge without affecting the welding gun 200.

[0065] In addition, there are many types of hinges, the more common ones are as follows Figure 7 The two types shown are: one is a flat hinge with the slit facing the side. The other is a recessed hinge with the slit facing upward. The present invention has made the following improvements to these two hinges:

[0066] Figure 8As shown in the figure, by setting the carrier plate 121 to be parallel to the rotating plate 110, the rotating plate 110 will also drive the carrier plate 121 and the hinge to tilt after being tilted. In this state, the hinge originally facing the side is adjusted to face upward, and the welding gun 200 can perform welding in a vertical manner.

[0067] Fig. 9 The welding method of the recessed hinge is shown. As shown in the figure, after the rotating plate 110 is tilted into the welding area 101, the bearing plate 121 is set to a horizontal state. In this state, the gap of this type of hinge is still facing upward, so that welding is performed in a vertical manner.

[0068] In summary, the inclination of the rotating plate 110 can not only guide the movement of the carrying plate 121, but also change the welding angle of the hinge so that the gap of the hinge faces upward, so that the welding fixture can adapt to different types of welding machines.

[0069] In the present invention, the rotating plate 110 tilting toward the welding area 101 refers to a state where the rotating plate 110 is located at a lower end of the welding area 101 and at a higher end of the loading and unloading area 102. The rotating plate 110 tilting toward the loading and unloading area 102 refers to a state where the rotating plate 110 is located at a higher end of the welding area 101 and at a lower end of the loading and unloading area 102.

[0070] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A welding and fixing device for preventing automobile hinges from loosening, characterized in that: It comprises a base (100) and a rotating plate (110) rotatably arranged on the top of the base (100), wherein two ends of the rotating plate (110) respectively correspond to a welding area (101) and a loading and unloading area (102); A hinge fixing member (120) for placing a hinge is slidably disposed on the top of the rotating plate (110), and the hinge fixing member (120) includes two inserting posts (122) that can be inserted into the hinge mounting holes; a pull rod (123) is disposed at the bottom of one of the inserting posts (122); A magnet counterweight (112) is slidably disposed at the bottom of the rotating plate (110); the rotating plate (110) is tilted accordingly by adjusting the position of the magnet counterweight (112) at the bottom of the rotating plate (110); and the speed of adjusting the position of the magnet counterweight (112) is less than the sliding speed of the hinge fixing member (120) at the top of the rotating plate (110); The magnet counterweight (112) is provided with a sliding rod (130), the top end of which passes through the top of the rotating plate (110) and then extends to the path along which the pull rod (123) moves; The sliding rod (130) longitudinally penetrates the magnet counterweight block (112) and is slidably connected to the magnet counterweight block (112). Under normal conditions, the sliding rod (130) slides down due to its own gravity to escape from the moving path of the pull rod (123); A baffle (114) is provided at the opening at the bottom of the rotating plate (110), and the baffle (114) is located at one end of the rotating plate (110) located in the welding area (101), and one end of the baffle (114) toward the middle of the rotating plate (110) is bent downward to form a bent end (115) for driving the sliding rod (130) to move upward, so that the sliding rod (130) re-enters the moving path of the pull rod (123) under the drive of the bent end (115); The overall speed at which the magnet counterweight (112) moves to the electromagnet (113) is slower than the overall speed at which the bearing plate (121) moves to the electromagnet (113); When the rotating plate (110) tilts toward the welding area (101), the magnet counterweight (112) drives the plug posts (122) in the welding area (101) during the position adjustment process, forcing the two plug posts (122) to tighten and fix the hinge.

2. The anti-loosening welding and fixing device for automobile hinges according to claim 1 is characterized in that: Two symmetrical vertical plates are arranged on the top of the base (100), and rotating shafts (111) are rotatably arranged on the two vertical plates, and the rotating shafts (111) are fixed on both sides of the rotating plate (110).

3. The anti-loosening welding and fixing device for automobile hinges according to claim 1 is characterized in that: The hinge fixing member (120) comprises a bearing plate (121) slidably arranged on the top of the rotating plate (110); The two plug posts (122) are respectively located at two ends of the top of the bearing plate (121), and one of the plug posts (122) is fixedly connected to the bearing plate (121), and the other is slidably connected to the bearing plate (121); A pull rod (123) is fixedly provided at the bottom of the plug post (122) which is slidably connected to the bearing plate (121); Both ends of the top of the rotating plate (110) are provided with stoppers for blocking the carrying plate (121).

4. The anti-loosening welding and fixing device for automobile hinges according to claim 3 is characterized in that: The sliding direction of the plug post (122) and the pull rod (123) is consistent with the sliding direction of the bearing plate (121).

5. The anti-loosening welding and fixing device for automobile hinges according to claim 3 is characterized in that: The rotating plate (110) is a shell having a hollow interior and an opening at the bottom; The magnet counterweight block (112) is slidably arranged inside the rotating plate (110); An electromagnet (113) is provided at one end of the rotating plate (110) for attracting and repelling the magnetic counterweight (112) so as to adjust the position of the magnetic counterweight (112) at the bottom of the rotating plate (110); The electromagnet (113) is arranged at one end of the rotating plate (110) located in the welding area (101).

6. The anti-loosening welding and fixing device for automobile hinges according to claim 1, characterized in that: The opening at the bottom of the rotating plate (110) corresponding to the baffle (114) is blocked by the baffle (114), so that a buffer cavity (116) with an entrance is formed at the top of the baffle (114); The side wall of the rotating plate (110) is provided with a one-way exhaust valve (132) and a one-way air intake valve (133) which are in communication with the buffer chamber (116); the one-way exhaust valve (132) limits the exhaust speed of the gas in the buffer chamber (116), so that the overall speed at which the magnet counterweight (112) moves to the electromagnet (113) is slower than the overall speed at which the supporting plate (121) moves to the electromagnet (113).

7. The automobile hinge anti-loosening welding and fixing device according to claim 3, characterized in that: The carrying plate (121) is parallel to the rotating plate (110).

8. The automobile hinge anti-loosening welding and fixing device according to claim 3, characterized in that: After the rotating plate (110) is tilted toward the welding area (101), the carrying plate (121) is in a horizontal state.

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