A multifunctional positioning device for a new energy vehicle subframe welding tool

Abstract

The application discloses a new energy automobile auxiliary frame welding tool multifunctional positioning device, relates to the automobile parts welding tool technical field, and includes a support table and an auxiliary frame, two positioning mechanisms are arranged on the support table, the two positioning mechanisms are symmetrically arranged on the left side and the right side top of the support table, the positioning mechanism is arranged, the bottom of the auxiliary frame is different in the inclined direction and the inclined angle, when the bottom contact surface of the auxiliary frame is supported, the support plate generates different inclined angles under the limiting sliding of the connecting universal ball, the bottom of the auxiliary frame is adjusted and supported, the electric push rod two is driven to move upward, the fixed ball is in close contact with the connecting washer, the rotating direction of the connecting universal ball is fixed by relying on the friction force generated by the strong pressure between the two, the auxiliary frame keeps the stable position in the welding process, and the welding quality is not affected by the position change.

Description

Technical Field

[0001] This invention relates to the field of welding tooling technology for automotive parts, and in particular to a multi-functional positioning device for welding tooling of subframes of new energy vehicles. Background Technology

[0002] In the welding manufacturing process of subframes for new energy vehicles, the positioning accuracy of the welding fixtures directly determines the final quality of the product. However, existing welding positioning devices still face many technical challenges in practical applications, making it difficult to meet the increasingly complex production needs of subframes.

[0003] Because the tilt direction and tilt angle of the positioning edge of the subframe of different models of new energy vehicles are different, and the existing subframe welding tooling support method is not flexible enough to adapt to the tilt positioning edge of these vehicle subframes, it is difficult to accurately fit the contact surface of the positioning edge in actual operation, resulting in a gap between the support point and the workpiece, and making it impossible to achieve a full-range tight fit.

[0004] In summary, there is an urgent need for a multi-functional positioning device that can flexibly adjust according to the tilt angle and direction of the subframe positioning edge, and can ensure that the workpiece maintains an absolutely stable position during the welding process through adaptive support and clamping, in order to solve the above-mentioned technical problems and thus greatly improve the welding accuracy and product quality. Summary of the Invention

[0005] One objective of this invention is to provide a multi-functional positioning device for welding tooling of subframes of new energy vehicles. This invention can be flexibly adjusted according to the tilt angle and direction of the positioning edge of the subframe, and can ensure that the workpiece maintains an absolutely stable position during the welding process through adaptive support and clamping.

[0006] According to an embodiment of the present invention, a multi-functional positioning device for welding tooling of subframe of new energy vehicle includes a support platform and a subframe. Positioning edges are provided on both sides of the subframe. A positioning mechanism is installed on the support platform, and two sets of positioning mechanisms are provided at the two ends of the support platform. The positioning mechanism includes a fixed frame that is fixedly mounted on a support platform. A support component is mounted on the fixed frame and is used to support the positioning edge of the subframe from the bottom. A drive component is mounted on one side of the fixed frame. A locking component is connected to the output end of the drive component and is rotatably connected to the fixed frame. The drive component drives the locking component to flip and press down on the upper part of the positioning edge of the subframe. The support assembly includes a mounting base, and two sets of mounting bases are provided on the positioning edges on both sides of the subframe. The top of the mounting base is provided with a mounting seat, and an adjusting component is provided between the mounting base and the mounting seat. The adjusting component is used to adjust and lock the tilt angle of the mounting seat. The fixed base and the mounting base are fixed together by several bolts, and the top of the fixed base is provided with a mounting groove; The adjusting component includes an electric push rod two, which is installed at the bottom of the fixed frame. Each output end of the electric push rod two is fixedly connected to a fixed ball. A connecting universal ball is slidably connected to the inner wall of the mounting groove. A support plate is fixedly connected to the top of the connecting universal ball, and a connecting gasket is installed at the bottom of the connecting universal ball. Both the connecting universal ball and the connecting gasket are hemispherical components. The fixed ball contacts the spherical inner wall of the corresponding connecting gasket. The connecting gasket and the fixed ball are made of rubber to enhance the friction when they are connected. The fixed seat has an internal cavity for the electric push rod two to push up and down, causing the fixed ball to move up and down vertically. During assembly, after fixing the connecting gasket to the bottom of the connecting universal ball, align it with the fixed ball so that the connecting universal ball is placed on top of the connecting universal ball. At this time, the mounting seat is fixed to the top of the fixed seat with multiple bolts to limit the connecting universal ball, ensuring that the connecting universal ball will not slip out when sliding on the inner wall of the fixed seat, thus ensuring the stability after assembly and improving the overall assembly practicality.

[0007] In a preferred embodiment, a trapezoidal groove is provided on the top of the support plate, and two sets of trapezoidal grooves are provided on the top two sides of the support plate. A trapezoidal slider is slidably connected to the inner wall of the trapezoidal groove. The trapezoidal shape design makes the sliding of the trapezoidal slider in the trapezoidal groove more stable and less prone to lateral displacement. At the same time, the cooperation between the trapezoidal groove and the trapezoidal slider provides an adjustable support point for the bottom of the subframe.

[0008] In a preferred embodiment, springs are fixedly connected to the sides of the two trapezoidal sliders that are close to each other, and the ends of the two springs that are far from each other are fixedly connected to the inner walls of the corresponding trapezoidal grooves. The elastic force of the springs allows the trapezoidal sliders to adaptively adjust the relative distance between them within a certain range, so as to better fit the bottom shape of the subframe, ensure the stability of the subframe placement, and thus improve the reliability of the positioning device in supporting the subframe.

[0009] In a preferred embodiment, the positioning edge of the subframe is arc-shaped, and the two sides of the arc-shaped protrusion at the bottom of the positioning edge contact two trapezoidal sliders respectively. The cooperation between the arc-shaped bottom and the trapezoidal sliders also facilitates the subframe to make minor positional adjustments on the trapezoidal sliders to meet the precise positioning requirements of the positioning mechanism for the subframe, further ensuring the positioning accuracy of the subframe before welding.

[0010] In a preferred embodiment, the drive assembly includes an electric actuator, the output end of which is connected to a hinge block. The electric actuator serves as a power source, providing precise linear motion to the hinge block.

[0011] In a preferred embodiment, the locking assembly includes a hinge frame, with a hinge block 1 rotatably connected to the hinge frame, and a hinge block 2 fixedly connected to the bottom of the hinge frame. The hinge block 2 is hinged to a corresponding fixed frame. When the electric push rod 1 pushes the hinge block 1 to move, the hinge frame can rotate and adjust accordingly according to the movement direction and angle of the hinge block 1.

[0012] In a preferred embodiment, the articulated frame is movably positioned directly above the corresponding fixed frame, and a connecting block is installed at the bottom of the articulated frame. Two sets of connecting blocks are provided on the positioning edges on both sides of the subframe, which can provide inflation power to the elastic element according to the needs of different positions on the top of the subframe.

[0013] In a preferred embodiment, a connecting pipe is fixedly connected to the inner wall of the connecting block, and an elastic element is installed at the bottom end of the connecting block. The elastic element is connected to the connecting pipe, and the connecting pipe provides the air guiding direction for the micro air pump.

[0014] In a preferred embodiment, a miniature air pump is installed on the connecting block. The output end of the miniature air pump is connected to the air inlet end of the connecting pipe. The bottom of the elastic element contacts the inner wall of the groove on the top of the subframe. This contact method of the elastic element can adaptively adjust according to the shape of the groove on the top of the subframe, providing uniform support force and further fixing the position of the subframe.

[0015] In a preferred embodiment, a positioning hole is provided on the subframe, and a fixing rod is fixedly connected to the fixing bracket, with the outer wall of the fixing rod contacting the inner wall of the positioning hole.

[0016] The beneficial effects of this invention are: This invention incorporates a positioning mechanism. Before welding the subframe, it is placed on top of four support plates. Due to the different tilt directions and angles of the subframe's bottom, the support plates, under the limiting sliding of the connecting universal ball joint, generate different tilt angles when supporting the bottom contact surface of the subframe. After adjusting and supporting the bottom of the subframe, the electric push rod can be driven to move the fixed ball upward, making it in close contact with the connecting gasket. The friction generated by the strong pressure between the two fixes the rotation direction of the connecting universal ball, ensuring that the subframe maintains a stable position during welding. This avoids affecting the welding quality due to positional changes. This structure can be adjusted according to different tilt angles and directions of the subframe's bottom, effectively avoiding the adverse effects on welding quality caused by subframe positional changes, and greatly improving welding accuracy and product quality. This invention utilizes trapezoidal sliders. Before fixing the subframe, positioning holes on the subframe are passed through fixing rods and placed on top of multiple trapezoidal grooves. The subframe is first placed on four support plates. At this point, the trapezoidal sliders contact the arc-shaped bottom portion of the subframe. Springs adaptively adjust the position of the trapezoidal sliders according to the shape of the subframe's bottom. This initial stabilization of the subframe, where the arc-shaped protrusion at the bottom contacts and supports the two trapezoidal sliders, provides greater stability compared to relying solely on a flat plate for single-point support. Support points are created on both sides of the arc-shaped protrusion at the bottom of the subframe to improve stability during support and initially stabilize the subframe. At the same time, two electric push rods drive the first hinge block to move upward. With the assistance of the second hinge block, the hinge frame flips downward around the first hinge block, and multiple elastic elements come into contact with the top of the subframe. At this time, multiple micro air pumps can be driven to inflate the elastic elements through the connecting pipe, so that the multiple elastic elements fit into the top groove of the subframe. Together with the bottom support of the trapezoidal slider, the subframe is clamped and fixed, providing a stable and reliable positioning foundation for subsequent welding processes and further ensuring welding quality. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the positioning mechanism in this invention.

[0019] Figure 3 This is a cross-sectional structural diagram of the fixing frame in this invention.

[0020] Figure 4 This is a cross-sectional structural diagram of the universal ball connection in this invention.

[0021] Figure 5 for Figure 2 A magnified structural diagram of point A in the middle.

[0022] Figure 6 for Figure 3 A magnified structural diagram at point B in the middle.

[0023] Figure 7 for Figure 4 A magnified structural diagram at point C.

[0024] Figure 8 This is a three-dimensional structural diagram of the subframe in this invention.

[0025] In the diagram: 1. Support platform; 2. Positioning mechanism; 3. Subframe; 31. Positioning hole; 32. Positioning edge; 21. Fixing frame; 22. Electric push rod one; 23. Hinge block one; 24. Hinge frame; 25. Hinge block two; 26. Fixing rod; 211. Fixing seat; 212. Mounting seat; 213. Bolt; 214. Mounting groove; 215. Electric push rod two; 216. Fixing ball; 217. Connecting universal ball; 218. Support plate; 219. Connecting gasket; 241. Connecting block; 242. Miniature air pump; 243. Connecting pipe; 244. Elastic element; 2181. Trapezoidal slide; 2182. Trapezoidal slider; 2183. Spring. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0027] refer to Figures 1 to 7 The support platform 1 and the subframe 3 are provided. The subframe 3 has positioning edges 32 on both sides. The support platform 1 is equipped with a positioning mechanism 2, and two sets of positioning mechanisms 2 are provided at the two ends of the support platform 1. The positioning mechanism 2 includes a fixed frame 21 fixedly installed on the support platform 1. A support component is installed on the fixed frame 21, and the support component is used to support the positioning edge 32 of the sub-frame 3 from the bottom. A drive component is installed on one side of the fixed frame 21. A locking component is connected to the output end of the drive component, and the locking component is rotatably connected to the fixed frame 21. The drive component drives the locking component to flip and press down on the upper part of the positioning edge 32 of the sub-frame 3. The support assembly includes a fixed seat 211, and two sets of fixed seats 211 are provided on the positioning edges 32 on both sides of the subframe 3. The top of the fixed seat 211 is provided with a mounting seat 212. An adjusting member is provided between the fixed seat 211 and the mounting seat 212, and the adjusting member is used to adjust and lock the tilt angle of the mounting seat 212. The fixed base 211 and the mounting base 212 are fixed together by a number of bolts 213, and the top of the fixed base 211 is provided with a mounting groove 214; The adjusting component includes an electric push rod 215, which is installed at the bottom of the fixed frame 21. The output end of the electric push rod 215 is fixedly connected to a fixed ball 216. A connecting universal ball 217 is slidably connected to the inner wall of the mounting groove 214. A support plate 218 is fixedly connected to the top of the connecting universal ball 217. A connecting gasket 219 is installed at the bottom of the connecting universal ball 217. Both the connecting universal ball 217 and the connecting gasket 219 are hemispherical components. The fixed ball 216 is in contact with the spherical inner wall of the corresponding connecting gasket 219.

[0028] It should be noted that the connecting washer 219 and the fixed ball 216 are made of rubber to enhance the friction when they are connected. The fixed seat 211 has a cavity inside for the electric push rod 215 to push up and down, driving the fixed ball 216 to move up and down in the vertical direction. During assembly, after fixing the connecting washer 219 to the bottom of the connecting universal ball 217, align it with the fixed ball 216 so that the connecting universal ball 217 is placed on top of the fixed ball 216. At this time, the mounting seat 212 is fixed to the top of the fixed seat 211 with multiple bolts 213 to limit the connecting universal ball 217, so that the connecting universal ball 217 will not slip out when sliding on the inner wall of the fixed seat 211, ensuring the stability after assembly and improving the overall assembly practicality.

[0029] In this embodiment, the specific implementation scenario is as follows: After the subframe 3 is placed on top of the four support plates 218, due to the different tilt directions and tilt angles of the bottom of the subframe 3, when supporting the bottom contact surface of the subframe 3, the support plates 218 generate different tilt angles under the limiting sliding of the connecting universal ball 217. After adjusting and supporting the bottom of the subframe 3, the electric push rod 215 can be driven to move the fixed ball 216 upward, so that the fixed ball 216 makes close contact with the connecting pad 219. The friction generated by the strong pressure between the two fixes the rotation direction of the connecting universal ball 217, so that the subframe 3 maintains a stable position during the welding process, avoiding the impact of position changes on the welding quality. This structure can be adjusted according to different tilt angles and directions of the bottom of the subframe 3, effectively avoiding the adverse effects on the welding quality caused by the position changes of the subframe 3, and greatly improving the welding accuracy and product quality.

[0030] like Figure 6 As shown, a trapezoidal groove 2181 is provided on the top of the support plate 218, and two sets of trapezoidal grooves 2181 are provided on both sides of the top of the support plate 218. A trapezoidal slider 2182 is slidably connected to the inner wall of the trapezoidal groove 2181.

[0031] It should be noted that the trapezoidal shape design makes the sliding of the trapezoidal slider 2182 within the trapezoidal groove 2181 more stable and less prone to lateral displacement. At the same time, the cooperation between the trapezoidal groove 2181 and the trapezoidal slider 2182 provides an adjustable support point for the bottom of the subframe 3.

[0032] like Figure 6 As shown, springs 2183 are fixedly connected to the sides of the two trapezoidal sliders 2182 that are close to each other, and the ends of the two springs 2183 that are far apart from each other are fixedly connected to the inner walls of the corresponding trapezoidal grooves 2181.

[0033] It should be noted that the elastic force of the spring 2183 enables the trapezoidal slider 2182 to adaptively adjust the relative distance between the two within a certain range, so as to better fit the bottom shape of the subframe 3, ensure the stability of the subframe 3, and thus improve the reliability of the positioning device in supporting the subframe 3.

[0034] like Figure 6 As shown, the positioning edge 32 of the subframe 3 is arc-shaped, and the two sides of the arc-shaped protrusion at the bottom of the positioning edge 32 are in contact with the two trapezoidal sliders 2182 respectively.

[0035] It should be noted that the cooperation between the arc-shaped bottom and the trapezoidal slider 2182 also facilitates the subframe 3 to make minor positional adjustments on the trapezoidal slider 2182, so as to meet the precise positioning requirements of the positioning mechanism for the subframe 3, and further ensure the positioning accuracy of the subframe 3 before welding.

[0036] like Figure 2 As shown, the drive assembly includes an electric actuator 22, and the output end of the electric actuator 22 is connected to a hinge block 23.

[0037] It should be noted that the electric actuator 22, as a power source, can provide precise linear motion for the articulated block 23.

[0038] like Figure 2 As shown, the locking assembly includes a hinge frame 24, a hinge block 23 is rotatably connected to the hinge frame 24, and a hinge block 25 is fixedly connected to the bottom of the hinge frame 24. The hinge block 25 is hinged to the corresponding fixed frame 21.

[0039] It should be noted that when the electric push rod 22 pushes the hinge block 23 to move, the hinge frame 24 can rotate and adjust accordingly according to the direction and angle of movement of the hinge block 23.

[0040] like Figures 2 to 5 As shown, the articulated frame 24 is movably positioned directly above the corresponding fixed frame 21. A connecting block 241 is installed at the bottom of the articulated frame 24, and two sets of connecting blocks 241 are provided on the positioning edges 32 on both sides of the subframe 3.

[0041] It should be noted that each connecting block 241 is equipped with three miniature air pumps 242, which can provide air pressure to the elastic element 244 according to the needs of different positions on the top of the subframe 3.

[0042] like Figures 2 to 5 As shown, a connecting pipe 243 is fixedly connected to the inner wall of the connecting block 241, and an elastic element 244 is installed at the bottom end of the connecting block 241. The elastic element 244 is connected to the connecting pipe 243.

[0043] It should be noted that the connecting pipe 243 provides the air guiding direction for the micro air pump 242, and the elastic element 244 can be a high-temperature resistant airbag or other high-temperature resistant elastic expandable component.

[0044] like Figures 2 to 5 As shown, a miniature air pump 242 is installed on the connecting block 241. The output end of the miniature air pump 242 is connected to the air inlet end of the connecting pipe 243. The bottom of the elastic element 244 is in contact with the inner wall of the groove on the top of the subframe 3.

[0045] It should be noted that by expanding the elastic element 244 and making it in close contact with the inner wall of the groove on the top of the subframe 3, this contact method of the elastic element 244 can be adaptively adjusted according to the shape of the groove on the top of the subframe 3, providing uniform support force and further fixing the position of the subframe 3.

[0046] like Figure 8 As shown, a positioning hole 31 is provided on the subframe 3, and a fixing rod 26 is fixedly connected to the fixing bracket 21. The outer wall of the fixing rod 26 is in contact with the inner wall of the positioning hole 31.

[0047] In this embodiment, the specific implementation scenario is as follows: Before fixing the subframe 3, the positioning hole 31 on the subframe 3 is passed through the fixing rod 26 and placed on the top of multiple trapezoidal slides 2181. First, the subframe 3 is placed on four support plates 218. At this time, the trapezoidal slider 2182 contacts the arc-shaped part at the bottom of the subframe 3. The spring 2183 adaptively adjusts the position of the trapezoidal slider 2182 according to the bottom shape of the subframe 3, so that the two springs 2183 adaptively adjust the position of the trapezoidal slider 2182 according to the bottom shape of the subframe 3, initially stabilizing the subframe 3, so that the arc-shaped protruding part at the bottom of the subframe 3 contacts the two trapezoidal sliders 2182 respectively to support it. Compared with simply relying on a flat plate for single-point support, this... The device can create support points on both sides of the arc-shaped protrusion at the bottom of the subframe 3 to improve stability during support and initially stabilize the subframe 3. At the same time, it drives two electric push rods 22 to move the hinge block 23 upward. With the assistance of the hinge block 25, the hinge frame 24 rotates downward around the hinge block 23, and multiple elastic elements 244 come into contact with the top of the subframe 3. At this time, multiple micro air pumps 242 can be driven to inflate the elastic elements 244 through the connecting pipe 243, so that the multiple elastic elements 244 fit into the top groove of the subframe 3 and, together with the bottom support of the trapezoidal slider 2182, clamp and fix the subframe 3, providing a stable and reliable positioning foundation for subsequent welding processes and further ensuring welding quality.

[0048] Working principle: After the subframe 3 is placed on top of the four support plates 218, due to the different tilt directions and angles of the bottom of the subframe 3, when supporting the bottom contact surface of the subframe 3, the support plates 218 will generate different tilt angles under the limiting sliding of the connecting universal ball 217. After adjusting and supporting the bottom of the subframe 3, the electric push rod 215 can be driven to move the fixed ball 216 upward, so that the fixed ball 216 makes close contact with the connecting pad 219. The friction generated by the strong pressure between the two fixes the rotation direction of the connecting universal ball 217, so that the subframe 3 maintains a stable position during the welding process, avoiding the impact of position changes on the welding quality. This structure can be adjusted according to different tilt angles and directions of the bottom of the subframe 3, effectively avoiding the adverse effects on the welding quality caused by the position changes of the subframe 3, and greatly improving the welding accuracy and product quality.

[0049] Before fixing the subframe 3, the positioning hole 31 on the subframe 3 is passed through the fixing rod 26 and placed on top of multiple trapezoidal slides 2181. First, the subframe 3 is placed on four support plates 218. At this time, the trapezoidal slider 2182 contacts the arc-shaped part at the bottom of the subframe 3. The spring 2183 adaptively adjusts the position of the trapezoidal slider 2182 according to the bottom shape of the subframe 3, so that the two springs 2183 adaptively adjust the position of the trapezoidal slider 2182 according to the bottom shape of the subframe 3, initially stabilizing the subframe 3. This allows the arc-shaped protrusion at the bottom of the subframe 3 to contact and support the two trapezoidal sliders 2182 respectively. Compared with simply relying on a flat plate for single-point support, this device can support the subframe 3 more effectively. Support points are created on both sides of the bottom arc-shaped protrusion of frame 3 to improve stability during support and initially stabilize subframe 3. At the same time, two electric push rods 22 drive the hinge block 23 to move upward. With the assistance of hinge block 25, the hinge frame 24 rotates downward around hinge block 23, and multiple elastic elements 244 come into contact with the top of subframe 3. At this time, multiple micro air pumps 242 can be driven to inflate the elastic elements 244 through the connecting pipe 243, so that the multiple elastic elements 244 fit into the top groove of subframe 3 and, together with the bottom support of trapezoidal slider 2182, clamp and fix subframe 3, providing a stable and reliable positioning foundation for subsequent welding processes and further ensuring welding quality.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-functional positioning device for welding tooling of subframes of new energy vehicles, comprising a support platform (1) and a subframe (3), wherein positioning edges (32) are provided on both sides of the subframe (3), characterized in that, The support platform (1) is equipped with a positioning mechanism (2), and two sets of positioning mechanisms (2) are set at both ends of the support platform (1). The positioning mechanism (2) includes a fixed frame (21) fixedly installed on a support platform (1). A support component is installed on the fixed frame (21), and the support component is used to support the positioning edge (32) of the subframe (3) from the bottom. A drive component is installed on one side of the fixed frame (21). A locking component is connected to the output end of the drive component, and the locking component is rotatably connected to the fixed frame (21). The drive component drives the locking component to flip and press down on the upper part of the positioning edge (32) of the subframe (3). The support assembly includes a fixed seat (211), and the fixed seat (211) is provided with two sets of positioning edges (32) on both sides of the subframe (3). The top of the fixed seat (211) is provided with a mounting seat (212). An adjusting member is provided between the fixed seat (211) and the mounting seat (212), and the adjusting member is used to adjust and lock the tilt angle of the mounting seat (212). The fixed base (211) and the mounting base (212) are fixed together by a number of bolts (213), and the top of the fixed base (211) is provided with a mounting groove (214). The adjusting component includes an electric push rod two (215), which is installed at the bottom of the fixed frame (21). The output end of the electric push rod two (215) is fixedly connected to a fixed ball (216). The inner wall of the mounting groove (214) is slidably connected to a connecting universal ball (217). The top of the connecting universal ball (217) is fixedly connected to a support plate (218). The bottom of the connecting universal ball (217) is installed with a connecting gasket (219). The connecting universal ball (217) and the connecting gasket (219) are both hemispherical components. The fixed ball (216) is in contact with the spherical inner wall of the corresponding connecting gasket (219).

2. The multi-functional positioning device for welding tooling of subframes of new energy vehicles according to claim 1, characterized in that, The top of the support plate (218) is provided with a trapezoidal groove (2181), and two sets of trapezoidal grooves (2181) are provided on both sides of the top of the support plate (218). The inner wall of the trapezoidal groove (2181) is slidably connected with a trapezoidal slider (2182).

3. The multi-functional positioning device for welding tooling of subframes of new energy vehicles according to claim 2, characterized in that, Springs (2183) are fixedly connected to the sides of the two trapezoidal sliders (2182) that are close to each other, and the ends of the two springs (2183) that are far apart from each other are fixedly connected to the inner wall of the corresponding trapezoidal groove (2181).

4. The multi-functional positioning device for welding tooling of subframes of new energy vehicles according to claim 3, characterized in that, The positioning edge (32) of the subframe (3) is arc-shaped, and the two sides of the arc-shaped protrusion at the bottom of the positioning edge (32) are in contact with two trapezoidal sliders (2182).

5. A multi-functional positioning device for welding tooling of subframes of new energy vehicles according to claim 4, characterized in that, The drive assembly includes an electric push rod (22), the output end of which is connected to a hinge block (23).

6. A multi-functional positioning device for welding tooling of subframes of new energy vehicles according to claim 5, characterized in that, The locking assembly includes a hinge frame (24), and the hinge block one (23) is rotatably connected to the hinge frame (24). The bottom of the hinge frame (24) is fixedly connected to a hinge block two (25), and the hinge block two (25) is hinged to a corresponding fixed frame (21).

7. A multi-functional positioning device for welding tooling of subframes of new energy vehicles according to claim 6, characterized in that, The articulated frame (24) is movably positioned directly above the corresponding fixed frame (21). A connecting block (241) is installed at the bottom of the articulated frame (24), and two sets of connecting blocks (241) are provided on the positioning edges (32) on both sides of the subframe (3).

8. A multi-functional positioning device for welding tooling of subframes of new energy vehicles according to claim 7, characterized in that, The inner wall of the connecting block (241) is fixedly connected to a connecting pipe (243), and an elastic element (244) is installed at the bottom end of the connecting block (241). The elastic element (244) is connected to the connecting pipe (243).

9. A multi-functional positioning device for welding tooling of subframes of new energy vehicles according to claim 8, characterized in that, A micro air pump (242) is installed on the connecting block (241). The output end of the micro air pump (242) is connected to the air inlet end of the connecting pipe (243). The bottom of the elastic element (244) is in contact with the inner wall of the groove on the top of the subframe (3).

10. A multi-functional positioning device for welding tooling of subframes of new energy vehicles according to claim 9, characterized in that, The subframe (3) has a positioning hole (31), and a fixing rod (26) is fixedly connected to the fixing frame (21). The outer wall of the fixing rod (26) is in contact with the inner wall of the positioning hole (31).

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