A double-layer automobile interior welding device

Abstract

The present invention discloses a double-layer automobile interior welding device, which relates to the technical field of automobile interior welding, including a workbench, a bearing bracket is fixed on the workbench, and also includes a support frame fixed on the workbench, a hot plate welding unit is arranged on the support frame, and the hot plate welding unit is used for heating, welding and fixing the double-layer interior, a cylinder is arranged on the support frame, and a pressure plate is fixed on the output end of the cylinder, and the pressure plate is used for tightly pressing the double-layer interior after heating and welding, and a positioning and clamping mechanism arranged on the bearing bracket. The present invention uses multiple positioning and clamping mechanisms to synchronously press and accurately position the side edges of the double-layer automobile interior, effectively prevent the edge warping of hot melt welding, and improve the welding effect. This technology solves the problem of uneven welding and ensures the high quality and beauty of the interior components. The synchronous clamping technology maintains the stability of the components and improves the welding accuracy and efficiency by accurately controlling the action of the clamping mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of automobile interior welding, and in particular to a double-layer automobile interior welding device. Background Art

[0002] Double-layer automobile interior welding device is a device specially used to weld two layers of different interior materials (such as plastic, leather, fabric, etc.) together during the automobile interior manufacturing process. Its main function is to firmly combine the double-layer interior materials at the edge or the entire contact surface through specific welding technology to meet the aesthetic, comfort and functional requirements of automobile interior.

[0003] The main types include hot plate welding devices, which include a heating plate, a fixture and a pressure system. First, the heating plate is heated to a preset temperature, and then the welding part of the double-layer interior material is brought into contact with the heating plate to melt the surface of the material. Then, the heating plate is removed, and the two layers of molten material are quickly bonded together under the action of the pressure system. After cooling, the materials are firmly welded together.

[0004] At present, hot plate welding technology is widely used in the welding operation of double-layer automobile interiors in the manufacturing process of automobile interiors. Due to the unique surface characteristics of double-layer interiors, when workers use heating plates to heat automobile interiors, they lack effective means to accurately position the double-layer interiors. Due to this positioning difficulty, wrinkles and unevenness are likely to occur during the welding process of double-layer interiors. These problems not only affect the aesthetics of the interior, but may also have a negative impact on the structural strength and service life of the interior.

[0005] Chinese patent document announcement number (CN114701172B) "discloses a multi-angle adaptive welding device for automobile interior, including an outer box, a bracket is fixedly connected to the top of the outer box, an adjustment frame is slidably connected to the top of the bracket, the adjustment frame extends to the bottom of the bracket, and one end of the top of the bracket is fixedly connected to a forward push cylinder, the output end of the forward push cylinder is fixedly connected to the adjustment frame, and the top of the adjustment frame is fixedly connected to a lifting cylinder. The present invention relates to the technical field of automobile interior welding equipment. The multi-angle adaptive welding device for automobile interior achieves the purpose of reducing the difficulty of use, can automatically fix the position of the automobile interior after it is placed in, and is convenient for welding. It has a high degree of flexibility and can conveniently adjust the inclination angle of the automobile interior according to needs to facilitate welding at different positions, improve the heat dissipation capacity, avoid excessive temperature during the welding process of the automobile interior, and reuse the heat generated during the welding process of the automobile interior." Although the above patent document can weld at different positions to avoid excessive temperature, it cannot ensure that the interior fabric remains relatively flat and prone to wrinkles. Summary of the invention

[0006] The purpose of the present invention is to provide a double-layer automobile interior welding device to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a double-layer automobile interior welding device, comprising:

[0008] A workbench, on which a load-bearing bracket is fixed, further comprising:

[0009] A support frame fixed on the workbench, the support frame is provided with a hot plate welding unit, the hot plate welding unit is used to heat, weld and fix the double-layer interior decoration, the support frame is provided with a cylinder, the output end of the cylinder is fixed with a pressing plate, the pressing plate is used to tightly press the double-layer interior decoration after heating and welding, and;

[0010] A positioning and clamping mechanism is arranged on the bearing bracket, and the positioning and clamping mechanism is used to prevent wrinkles or even deviation during welding of the double-layer interior.

[0011] Preferably, the hot plate welding unit includes at least two mounting plates fixed on the support frame, a guide rod a is fixed on the mounting plate, a threaded rod a is rotatably connected to the mounting plate, a movable plate is threadedly connected to the threaded rod a, and the movable plate is slidably penetrated by the outer surface of the guide rod a, a connecting rod a is slidably penetrated on the movable plate through at least two mounting sleeves, a heating plate is fixed to one end of the connecting rod a, a handle is fixed to the other end of the connecting rod a through a connecting plate, a spring a is sleeved on the outer surface of the connecting rod a, one end of the spring a is fixed to the movable plate, and the other end of the spring a is fixed to the connecting plate.

[0012] Preferably, at least two connecting rods b are fixed to the bottom surface of the connecting plate, the connecting rods b and the movable plate are slidably arranged to penetrate each other, the other end of the connecting rods b is fixed to the top surface of the heating plate, and the connecting rods b are located on one side of the connecting rod a.

[0013] Preferably, the positioning and clamping mechanism includes a support plate fixed on the bearing bracket, a mounting seat fixed on the support plate, a threaded sleeve rotatably connected in the mounting seat, a threaded rod b threadedly connected at the threaded sleeve, an extrusion plate fixed at one end of the threaded rod b, and the extrusion plate is slidably connected to the top surface of the support plate, a rotating seat fixed on the support plate, the rotating seat is rotatably connected to a transmission plate through a center rod, a roller is rotatably connected to the transmission plate, a clamping plate is hinged at the other end of the transmission plate, and a driving member compatible with the threaded sleeve is provided on the bearing bracket.

[0014] Preferably, the driving member includes a rotating shaft rotatably connected to the bearing bracket, a dual-axis motor is fixed on the bearing bracket, the output shaft of the dual-axis motor is coaxially fixed with the rotating shaft, a through groove is opened on the support plate, a spur gear a is fastened with the outer surface of the threaded sleeve, a spur gear b is fixed on the rotating shaft, the spur gear a is meshingly connected with the spur gear b, and the meshing connection between the spur gear a and the spur gear b is located in the through groove.

[0015] Preferably, a channel is opened on the support plate, the rotating seat is slidably connected to the channel, a spring b is fixed on the rotating seat, the other end of the spring b is fixed to the supporting bracket, the extrusion plate is arranged in an inclined surface on the side close to the roller, and the opening length of the channel is less than the inclined length of the extrusion plate.

[0016] Preferably, a protective shell a is fixed on the support frame, an operating rod is rotatably connected inside the protective shell a, bevel gears are fixed between the operating rod and the threaded rod a, the two bevel gears are meshed and connected to each other, and a rotating wheel is fixed at one end of the operating rod.

[0017] Preferably, a slide groove is provided on the support plate, the extrusion plate is slidably connected to the slide groove, and the slide groove is communicated with the channel.

[0018] Preferably, at least two buffer pads are fixed to the bottom surface of the movable plate, the top surface of the heating plate abuts against the buffer pads, and the width of the buffer pads is consistent with the width of the movable plate.

[0019] Preferably, a guide groove is provided on the top surface of the support frame, a movable plate is slidably connected in the guide groove, and the cylinder is fixed to the movable plate.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention uses multiple positioning and clamping mechanisms to achieve synchronous clamping and precise positioning of the side edges of the double-layer automobile interior. This process can not only effectively avoid the edge warping phenomenon that may occur during hot-melt welding, but also significantly improve the overall effect of hot-melt welding. In this way, the unevenness problem that may occur in the double-layer automobile interior during the welding process is successfully solved.

[0022] The present invention adopts the setting of the hot plate welding unit, so the operator can flexibly adjust the welding position on the straight line according to the actual production needs. After completing the welding task, the heating plate can automatically rebound and reset to the initial position. This feature greatly improves the operating convenience of the staff. Compared with the traditional hand-held heating plate welding method, the hot plate welding unit effectively solves the instability problem caused by hand-held operation, making the welding process more stable and reliable, and also ensuring the consistency and reliability of the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a side view structural schematic diagram of the present invention;

[0025] Figure 3 It is a schematic diagram of the back structure of the present invention;

[0026] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of the middle A area;

[0027] Figure 5 It is a bottom view structural schematic diagram of the present invention;

[0028] Figure 6 It is a partial main structural schematic diagram of the present invention;

[0029] Figure 7 for Figure 6 A magnified schematic diagram of the structure of the middle B region;

[0030] Figure 8 for Figure 6 A magnified schematic diagram of the structure of the middle C region;

[0031] Fig. 9 It is a schematic diagram of the local structure of the positioning and pressing mechanism of the present invention;

[0032] Fig.10 It is a schematic diagram of the structure of the protective shell a of the present invention.

[0033] In the figure: 1, workbench; 2, bearing bracket; 3, hot plate welding unit; 4, cylinder; 5, pressing plate; 6, moving plate; 7, positioning and clamping mechanism; 8, mounting plate; 9, guide rod a; 10, threaded rod a; 11, movable plate; 12, connecting rod a; 13, heating plate; 14, connecting plate; 15, handle; 16, spring a; 17, connecting rod b; 18, supporting plate; 19, mounting seat; 20, threaded sleeve; 21, threaded rod b; 22 , extrusion plate; 23, rotating seat; 24, center rod; 25, transmission plate; 26, roller; 27, clamping plate; 28, driving member; 29, rotating shaft; 30, dual-axis motor; 31, through slot; 32, spur gear a; 33, spur gear b; 34, channel; 35, spring b; 36, protective shell a; 37, bevel gear; 38, rotating wheel; 39, slide slot; 40, buffer pad; 41, guide slot; 42, support frame; 43, operating lever. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of 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.

[0035] Embodiment 1:

[0036] See also Figure 1 - Fig.10 A double-layer automobile interior welding device comprises a workbench 1, a bearing bracket 2 is fixed on the workbench 1, and a support frame 42 fixed on the workbench 1, a hot plate welding unit 3 is arranged on the support frame 42, and the hot plate welding unit 3 is used for heating, welding and fixing the double-layer interior, a cylinder 4 is arranged on the support frame 42, and a pressing plate 5 is fixed on the output end of the cylinder 4, and the pressing plate 5 is used for tightly pressing the double-layer interior after heating and welding, and a positioning and pressing mechanism 7 is arranged on the bearing bracket 2, and the positioning and pressing mechanism 7 is used to prevent wrinkles or even deviation during welding of the double-layer interior;

[0037] The top surface of the support frame 42 is provided with a guide groove 41, a movable plate 6 is slidably connected in the guide groove 41, the cylinder 4 is fixed to the movable plate 6, and the movable plate 6 is slidably connected in the guide groove 41, so that the cylinder 4 can move in the track of the guide groove 41;

[0038] In addition, the cylinder 4 is provided with an adjustment mechanism on the support frame 42, and its main structure includes an operating wheel, a screw rod, and a threaded sleeve fixed on the movable plate 6. The specific operation is: by rotating the operating wheel, the screw rod is driven to rotate synchronously, and the threaded transmission effect between the screw rod and the threaded sleeve is utilized, so that the movable plate 6 is subjected to force and drives the cylinder 4 to synchronously perform a translational linear motion along the guide groove 41, and its displacement direction is only a linear left and right movement, so as to adjust the pressing plate 5 to a specified position;

[0039] In this solution, the double-layer interior of the car is placed on the supporting bracket 2 of the workbench 1. After ensuring that the double-layer interior of the car is placed flat, the double-layer interior of the car is pressed onto the supporting bracket 2 by the positioning and clamping mechanism 7. At this time, the double-layer interior of the car is kept flat by the cylinder 4 to effectively prevent wrinkles. After the hot plate welding unit 3 is adjusted to a suitable position, the positioning of the double-layer interior of the car is released by the positioning and clamping mechanism 7. The double-layer interior of the car is heated by the hot plate welding unit 3 to melt the surface of the material. After the heating of the double-layer interior of the car is completed, the cylinder 4 drives the pressing plate 5 to apply pressure to the double-layer interior of the car. The pressure is maintained at a certain value for a predetermined time, and the melted part is cooled and solidified, and the double-layer interior material of the car is welded.

[0040] Further, such as Figure 1 - Figure 2 , Figure 6 and Figure 8 As shown, the hot plate welding unit 3 in the figure includes at least two mounting plates 8 fixed on a support frame 42, a guide rod a9 fixed on the mounting plate 8, a threaded rod a10 rotatably connected to the mounting plate 8, a movable plate 11 threadedly connected to the threaded rod a10, and the movable plate 11 is slidably penetrated with the outer surface of the guide rod a9, a connecting rod a12 is slidably penetrated through the movable plate 11 through at least two mounting sleeves, a heating plate 13 is fixed to one end of the connecting rod a12, a handle 15 is fixed to the other end of the connecting rod a12 through a connecting plate 14, a spring a16 is sleeved on the outer surface of the connecting rod a12, one end of the spring a16 is fixed to the movable plate 11, and the other end of the spring a16 is fixed to the connecting plate 14;

[0041] Among them, a protective shell a36 is fixed on the support frame 42, and an operating rod 43 is rotatably connected in the protective shell a36. A bevel gear 37 is fixed between the operating rod 43 and the threaded rod a10. The two bevel gears 37 are meshed and connected with each other. A rotating wheel 38 is fixed at one end of the operating rod 43;

[0042] The connection between the connecting plate 14 and the heating plate 13 is optimized. At least two connecting rods b17 are fixed to the bottom surface of the connecting plate 14. The connecting rod b17 and the movable plate 11 are slidably arranged to penetrate each other. The other end of the connecting rod b17 is fixed to the top surface of the heating plate 13, and the connecting rod b17 is located on one side of the connecting rod a12. By adding two connecting rods b17, the connection stability between the connecting plate 14 and the heating plate 13 can be significantly improved, and the shaking of the heating plate 13 when the handle 15 is pressed can be effectively avoided.

[0043] It should be noted that, by using the hot plate welding unit 3, the operator can flexibly adjust the welding position on the straight line according to the actual production needs. After completing the welding task, the heating plate 13 can automatically rebound and reset to the initial position. This feature greatly improves the operating convenience of the staff. Compared with the traditional hand-held heating plate 13 welding method, the hot plate welding unit 3 effectively solves the instability problem caused by hand-held operation, making the welding process more stable and reliable. In addition, it also improves the flexibility and convenience of operation, thereby avoiding the position shaking that may occur when holding the heating plate 13, ensuring the accuracy and effect of welding the double-layer interior of the car;

[0044] The heating principle of the hot plate welding unit 3 for the double-layer interior of the car is as follows: by manually rotating the wheel 38 and utilizing the meshing transmission of the two bevel gears 37, the threaded rod a10 is rotated synchronously, and the threaded transmission between the threaded rod a10 and the movable plate 11 is utilized to cause the movable plate 11 to move linearly along the surface of the guide rod a9 after being subjected to force, thereby being able to change the planar linear position of the heating plate 13, and by pressing the handle 15 downward and relying on the connecting rod a12 and the connecting rod b17 for transmission, the heating plate 13 is subjected to force and moves downward, and the heating plate 13 and the double-layer interior material of the car are heated until they are melted.

[0045] Further, such as Figure 4 , Figure 7 and Fig. 9 As shown, the positioning and clamping mechanism 7 in the figure includes a support plate 18 fixed on the bearing bracket 2, a mounting seat 19 is fixed on the support plate 18, a threaded sleeve 20 is rotatably connected in the mounting seat 19, a threaded rod b21 is threadedly connected at the threaded sleeve 20, an extrusion plate 22 is fixed at one end of the threaded rod b21, a slide groove 39 is provided on the support plate 18, the extrusion plate 22 is slidably connected with the slide groove 39, the slide groove 39 is connected with the channel 34, and the addition of the slide groove 39 can provide a guiding effect for the extrusion plate 22 to ensure that the movement of the extrusion plate 22 remains in a stable state, and the extrusion plate 22 is slidably connected with the top surface of the support plate 18, a rotating seat 23 is fixed on the support plate 18, and the rotating seat 23 is rotatably connected with a transmission plate 25 through a center rod 24, a roller 26 is rotatably connected to the transmission plate 25, and a clamping plate 27 is hinged at the other end of the transmission plate 25;

[0046] It should be noted that, by using multiple positioning and pressing mechanisms 7, the synchronous pressing and precise positioning of the side edges of the double-layer interior of the automobile can be achieved. This process can not only effectively avoid the edge warping phenomenon that may occur during hot-melt welding, but also significantly improve the overall effect of hot-melt welding. In this way, the unevenness problem that may occur during the welding process of the double-layer interior of the automobile is successfully solved, ensuring the high quality and aesthetics of the interior parts.

[0047] The support plate 18 is provided with a channel 34, the rotating seat 23 is slidably connected with the channel 34, a spring b35 is fixed on the rotating seat 23, and the other end of the spring b35 is fixed to the bearing bracket 2;

[0048] Specifically, when the extrusion plate 22 contacts and extrude the roller 26, the roller 26 is flipped along the axis of the center rod 24 after being subjected to force, and the rotating seat 23 is translated along the channel 34 after being subjected to force. When the rotating seat 23 moves to the dead point of the channel 34, the rotating seat 23 is in an immobile state. The side of the extrusion plate 22 close to the roller 26 is arranged in an inclined surface. The opening length of the channel 34 is less than the inclined surface length of the extrusion plate 22. The inclined surface of the extrusion plate 22 is arranged to ensure that the extrusion plate 22 maintains relative stability when contacting and extruding the roller 26.

[0049] This solution is for the welding process of double-layer automobile interior:

[0050] First, the operator lays the double-layer car interior fabric flat on the top surface of the support bracket 2, and drives the dual-axis motor 30 to simultaneously press and position the car interior on the side of the car interior by multiple pressing plates 27, and then press the car interior on the support bracket 2;

[0051] Secondly, the operator rotates the rotating wheel 38 to adjust the heating plate 13 to the specified position. If the pressing plate 27 hinders the use of the heating plate 13, the double-axis motor 30 drives the pressing plate 27 and the transmission plate 25 to return to their original positions. After the position adjustment of the positioning and pressing mechanism 7 is completed, the handle 15 is pressed downward to fit the heating plate 13 to the car interior, so that the surface layer of the car interior material is softened or even melted by heat. After completion, the handle 15 is released, and the elastic effect of the spring a16 is used to make the heating plate 13 rebound to the initial position after being stressed.

[0052] Finally, the position of the cylinder 4 is adjusted to the required position. The pressure plate 5 is driven by the cylinder 4 to move downward after being subjected to force. The pressure plate 5 presses the car interior tightly, ensuring that the applied pressure and the pressing time are kept within the preset range, and wait until the melted part is completely cooled, so as to form a reliable connection.

[0053] Embodiment 2:

[0054] Based on the first embodiment, according to Figure 6 and Figure 7 As shown, it is worth specifically explaining that a driving member 28 adapted to the threaded sleeve 20 is provided on the bearing bracket 2, and the driving member 28 includes a rotating shaft 29 rotatably connected to the bearing bracket 2, a dual-axis motor 30 is fixed on the bearing bracket 2, and the output shaft of the dual-axis motor 30 is coaxially fixed with the rotating shaft 29, a through slot 31 is opened on the support plate 18, a spur gear a32 is fastened and sleeved on the outer surface of the threaded sleeve 20, a spur gear b33 is fixed on the rotating shaft 29, the spur gear a32 is meshed and connected with the spur gear b33, and the meshing connection between the spur gear a32 and the spur gear b33 is located in the through slot 31;

[0055] It should be noted that the dual-axis motor 30 in this solution can realize the same direction or reverse rotation according to specific application requirements and control methods to achieve precise control of the steering of the rotating shaft 29. This is a conventional setting in the art, so it will not be described in detail here;

[0056] The positioning principle of the positioning and clamping mechanism 7 for the side clamping and positioning of the double-layer interior of the automobile is as follows: through the drive of the dual-axis motor 30, the rotating shaft 29 is rotated after being subjected to force, so that the spur gear b33 rotates synchronously, and the spur gear b33 and the spur gear a32 are meshed and driven to drive the threaded sleeve 20 to rotate synchronously, and the threaded transmission effect between the threaded sleeve 20 and the threaded rod b21 is utilized to make the threaded rod b21 move spirally toward the extrusion plate 22 after being subjected to force, and then push the extrusion plate 22 to move linearly, and the extrusion plate 22 is contacted with the roller 26, so that the transmission plate 25 is turned over along the axis point of the center rod 24 after being subjected to force, and then drives the clamping plate 27 to move synchronously until the clamping plate 27 and the double-layer interior of the automobile are in a clamped state.

[0057] Embodiment 3

[0058] See also Figure 1 and Figure 6 This embodiment further illustrates other embodiments, and the difference lies in that the connection between the heating plate 13 and the movable plate 11 is optimized.

[0059] Specifically, at least two buffer pads 40 are fixed to the bottom surface of the movable plate 11, and the top surface of the heating plate 13 abuts against the buffer pads 40, and the width of the buffer pads 40 is consistent with the width of the movable plate 11;

[0060] It should be noted that, by adding the buffer pad 40 , a buffer effect can be provided for the adjacent surfaces of the movable plate 11 and the heating plate 13 , thereby preventing the heating plate 13 from being damaged by collision when it rebounds and resets, thereby effectively providing protection for the heating plate 13 .

[0061] The heating plate 13, the dual-axis motor 30, and the cylinder 4 can all be purchased on the market. The heating plate 13, the dual-axis motor 30, and the cylinder 4 are all equipped with power supplies, which are mature technologies in this field and have been fully disclosed, so they are not repeated in the specification.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-layer automobile interior welding device, comprising: A workbench (1), wherein a bearing bracket (2) is fixed on the workbench (1); It is characterized by further comprising: A support frame (42) fixed on the workbench (1), the support frame (42) being provided with a hot plate welding unit (3), the hot plate welding unit (3) being used for heating, welding and fixing the double-layer interior decoration, the hot plate welding unit (3) comprising at least two mounting plates (8) fixed on the support frame (42), the mounting plates (8) being fixed with guide rods a (9), the mounting plates (8) being rotatably connected with threaded rods a (10), the threaded rods a (10) being threadedly connected with a movable plate (11), and the movable plate (11) being slidably penetrated by the outer surface of the guide rods a (9), the movable plate (11) being threadedly connected with a guide rod a (9). A connecting rod a (12) is slidably passed through at least two mounting sleeves, a heating plate (13) is fixed to one end of the connecting rod a (12), a handle (15) is fixed to the other end of the connecting rod a (12) through a connecting plate (14), a spring a (16) is sleeved on the outer surface of the connecting rod a (12), one end of the spring a (16) is fixed to the movable plate (11), and the other end of the spring a (16) is fixed to the connecting plate (14), a cylinder (4) is arranged on the support frame (42), a pressing plate (5) is fixed to the output end of the cylinder (4), and the pressing plate (5) is used to tightly press the double-layer interior after heating and welding, and; A positioning and clamping mechanism (7) disposed on the bearing bracket (2), the positioning and clamping mechanism (7) being used to prevent wrinkles or even deviations from occurring during welding of the double-layer interior trim; The positioning and clamping mechanism (7) comprises a support plate (18) fixed on the bearing bracket (2), a mounting seat (19) fixed on the support plate (18), a threaded sleeve (20) rotatably connected inside the mounting seat (19), a threaded rod b (21) threadedly connected at the threaded sleeve (20), an extrusion plate (22) fixed at one end of the threaded rod b (21), and the extrusion plate (22) is slidably connected to the top surface of the support plate (18), a rotating seat (23) fixed on the support plate (18), a transmission plate (25) rotatably connected to the rotating seat (23) via a center rod (24), a roller (26) rotatably connected to the transmission plate (25), a clamping plate (27) hingedly connected to the other end of the transmission plate (25), and a driving member (28) adapted to the threaded sleeve (20) is provided on the bearing bracket (2); The driving member (28) comprises a rotating shaft (29) rotatably connected to the bearing bracket (2); a dual-axis motor (30) is fixed to the bearing bracket (2); an output shaft of the dual-axis motor (30) is coaxially fixed to the rotating shaft (29); a through slot (31) is provided on the support plate (18); a spur gear a (32) is fastened to the outer surface of the threaded sleeve (20); a spur gear b (33) is fixed to the rotating shaft (29); the spur gear a (32) is meshingly connected to the spur gear b (33); a meshing connection between the spur gear a (32) and the spur gear b (33) is located in the through slot (31); A channel (34) is provided on the support plate (18), the rotating seat (23) is slidably connected to the channel (34), a spring b (35) is fixed to the rotating seat (23), the other end of the spring b (35) is fixed to the supporting bracket (2), the side of the extrusion plate (22) close to the roller (26) is arranged in an inclined surface, the opening length of the channel (34) is less than the inclined length of the extrusion plate (22), a slide groove (39) is provided on the support plate (18), the extrusion plate (22) is slidably connected to the slide groove (39), and the slide groove (39) is arranged in communication with the channel (34).

2. A double-layer automobile interior welding device according to claim 1, characterized in that: At least two connecting rods b (17) are fixed to the bottom surface of the connecting plate (14), and the connecting rods b (17) and the movable plate (11) are slidably intersected, and the other end of the connecting rod b (17) is fixed to the top surface of the heating plate (13), and the connecting rod b (17) is located on one side of the connecting rod a (12).

3. A double-layer automobile interior welding device according to claim 1, characterized in that: A protective shell a (36) is fixed on the support frame (42), an operating rod (43) is rotatably connected inside the protective shell a (36), a bevel gear (37) is fixed between the operating rod (43) and the threaded rod a (10), the two bevel gears (37) are meshed and connected with each other, and a rotating wheel (38) is fixed to one end of the operating rod (43).

4. A double-layer automobile interior welding device according to claim 1, characterized in that: At least two buffer pads (40) are fixed to the bottom surface of the movable plate (11), the top surface of the heating plate (13) abuts against the buffer pads (40), and the width of the buffer pads (40) is consistent with the width of the movable plate (11).

5. A double-layer automobile interior welding device according to claim 1, characterized in that: A guide groove (41) is provided on the top surface of the support frame (42), a movable plate (6) is slidably connected in the guide groove (41), and the cylinder (4) is fixed to the movable plate (6).

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