A frame positioning tool

Abstract

The utility model provides a kind of frame positioning tool, including base, rotating frame and two mounting plates, the both sides of the rotating frame are provided with rotating assembly, the adjusting assembly includes second screw rod, movable plate and locating block, the inside of the rotating frame is opened with movable slot, the rotating frame is threadedly connected with second screw rod, the one end of the second screw rod is fixedly installed with second hand wheel, by setting rotating assembly, it can be adjusted the perpendicular angle of rotating frame according to actual demand, can satisfy the accurate requirement of different processing or assembly process to frame angle, ensure that frame is in the best processing position, when two locating blocks are inserted into suitable locating slot, the position of rotating frame can be accurately fixed, avoid the processing or assembly quality problem caused by angle deviation, also can ensure that rotating frame does not occur wobble or displacement in processing or assembly process, improve the stability of processing.

Description

Technical Field

[0001] This utility model relates to a chassis positioning fixture. Background Technology

[0002] Electric vehicles, also known as electric-driven vehicles, are divided into AC electric vehicles and DC electric vehicles. Generally speaking, an electric vehicle uses a battery as its energy source, converting electrical energy into mechanical energy for movement through components such as controllers and motors. Speed ​​is controlled by adjusting the current. The frame is the main supporting structure of the electric vehicle. Multiple tooling components of varying sizes are used during the frame welding process. Since different vehicle models require different tooling components, different tooling components need to be changed when producing different models.

[0003] Existing frame positioning fixtures can only rotate electric vehicles horizontally. For vertical rotation, the electric vehicle frame needs to be manually removed from the positioning fixture and the angle of the frame needs to be adjusted. This is not only time-consuming and labor-intensive, but also prone to worker injury due to improper operation. Furthermore, it is difficult to meet the precise requirements of different processing or assembly processes for the frame angle. Moreover, electric vehicle frames usually have complex curves and curved surface shapes, and the clamping components have difficulty conforming to the irregular shape of the frame surface when positioning and clamping the electric vehicle frame, resulting in poor stability of the fixed frame. Utility Model Content

[0004] This invention addresses the problem that electric vehicles can only be rotated horizontally. When rotating vertically, the electric vehicle frame needs to be manually removed from the positioning fixture to adjust its angle. This process is time-consuming, labor-intensive, and prone to worker injury due to improper operation. Furthermore, it is difficult to meet the precise angle requirements of different processing or assembly processes. Moreover, electric vehicle frames typically have complex curves and curved surfaces, making it difficult for the clamping components to conform to the irregular shape of the frame surface when positioning and clamping the electric vehicle frame, resulting in poor frame stability. Therefore, this invention provides a frame positioning fixture.

[0005] This utility model solves the above-mentioned technical problems through the following technical solutions: This utility model provides a vehicle frame positioning fixture, including a base, a rotating frame, and two mounting plates. Rotating components are provided on both sides of the rotating frame. Each adjusting component includes a second screw, a movable plate, and positioning blocks. The rotating frame has an internal movable groove. A second screw is threaded onto the rotating frame. A second handwheel is fixedly mounted on one end of the second screw, and the other end of the second screw extends into the movable groove and is rotatably connected to the movable plate via a bearing. Two positioning blocks are fixedly mounted on one side of the movable plate. The mounting plate has multiple equidistantly distributed positioning grooves, and both positioning blocks can be inserted into the multiple positioning grooves. The mounting frame is provided with multiple adjustment components, each including a fixed cylinder, a movable cylinder, and a first screw. The fixed cylinder is fixedly installed inside the rotating frame. The first screw is rotatably connected to the inside of the fixed cylinder via a bearing. A first handwheel is fixedly installed at one end of the first screw, and the other end of the first screw extends into the inside of the fixed cylinder and is threadedly connected to the movable cylinder.

[0006] In this technical solution, the bottom ends of the two movable cylinders on the left and right sides are fixedly installed with connecting seats, and the interiors of the four connecting seats are rotatably connected with universal balls. One end of each of the multiple universal balls is fixedly installed with a second fixing frame, and the bottom ends of the two movable cylinders in the middle are fixedly installed with a first fixing frame.

[0007] In this technical solution, both the first and second fixing frames are equipped with fixing components inside. The fixing components include screws, clamping plates, and anti-slip pads. Both the first and second fixing frames are threadedly connected to screws inside. One end of each screw is fixedly mounted with a disc wheel, and the other end of each screw is rotatably connected to a clamping plate via a bearing. One side of each clamping plate is provided with an anti-slip pad.

[0008] In this technical solution, both the first and second fixing frames have internal sliding grooves, and each of the plurality of clamping plates has a slider fixedly installed on one side, and the sliders are slidably connected to the sliding grooves.

[0009] In this technical solution, two limiting grooves are formed on the inner walls of the multiple fixed cylinders, and two limiting blocks are fixedly installed on the multiple movable cylinders, with the two limiting blocks slidably connected to the limiting grooves.

[0010] In this technical solution, two mounting brackets are fixedly installed on the rotating seat, and a first motor is fixedly installed on each of the two mounting brackets. Four movable blocks are rotatably connected inside the two mounting brackets through bearings. Movable blocks are threadedly connected to the two lead screws. Mounting plates are fixedly installed on one side of each of the two movable blocks. Rotating shafts are rotatably connected to each of the two mounting plates through bearings. One end of each of the two rotating shafts is fixedly installed to the same rotating bracket.

[0011] In this technical solution, two guide rods are fixedly installed inside each of the two mounting brackets, and the two movable blocks are slidably connected to the two guide rods.

[0012] In this technical solution, a second motor is fixedly installed on the base, and the output shaft of the second motor passes through the base and is fixedly installed on a rotating seat.

[0013] In this technical solution, a plurality of auxiliary wheels are fixedly installed at the bottom end of the rotating seat, and the bottom ends of the plurality of auxiliary wheels abut against the base.

[0014] In this technical solution, four legs are fixedly installed at the bottom of the base.

[0015] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0016] The positive and progressive effects of this utility model are as follows: The aforementioned frame positioning fixture, by setting a rotating component, enables adjustment of the vertical angle of the rotating frame. The vertical angle of the rotating frame can be adjusted according to actual needs, meeting the precise requirements of different processing or assembly processes for the frame angle, ensuring that the frame is in the optimal processing position. When the two positioning blocks are inserted into the appropriate positioning slots, the position of the rotating frame can be accurately fixed, avoiding processing or assembly quality problems caused by angle deviation. It can also ensure that the rotating frame will not shake or shift during processing or assembly, improving processing stability, ensuring the safety of operators, and reducing the risk of accidents caused by frame shaking. By setting adjustment and fixing components, rotating the first handwheel in sequence allows the adjustment component to control the movement distance and position of the fixing component. This enables fine-tuning according to the actual size of the electric vehicle frame, ensuring precise fixing of the frame, improving operational accuracy and work efficiency. The position and spacing of the fixing components can be flexibly changed, allowing the tooling to adapt to frames of various sizes, ensuring balanced force on the frame, avoiding excessive local force that could lead to deformation, guaranteeing fixing stability, and facilitating subsequent processing or assembly operations. Rotating multiple disc wheels in sequence allows the frame to be clamped from multiple directions, ensuring uniform force on the frame, helping to prevent deformation of the frame during processing, and guaranteeing the processing accuracy and quality of the frame. By incorporating omnidirectional balls and connecting seats, the omnidirectional balls allow multiple second fixing brackets to rotate freely within a certain range, better conforming to the irregular shape of the frame surface. This enhances the contact adaptability between the fixing components and the frame, ensuring the frame is stably fixed. The fixing components on the two first fixing brackets are typically located in critical parts of the frame, bearing the main support and fixing functions. This ensures a large contact area and stable connection between the fixing components and the frame, providing stronger clamping and support forces. This prevents the frame from shaking or shifting during processing or assembly. The fixing components with omnidirectional balls on both sides and the middle fixing component work together to achieve comprehensive, multi-layered stable fixing of the electric vehicle frame, ensuring the safety and reliability of the frame during processing and assembly. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the internal front view of the present invention.

[0019] Figure 3 This is a side view of the internal structure of the mounting bracket of this utility model.

[0020] Figure 4 This is an enlarged structural schematic diagram of the first fixing frame of this utility model.

[0021] Figure 5 This is a magnified schematic diagram of the internal structure of the adjustment component of this utility model.

[0022] Figure 6 This is a side view of the internal structure of the mounting plate of this utility model.

[0023] Figure 7 This utility model Figure 2 A magnified structural diagram at point A.

[0024] Explanation of reference numerals in the attached figures 1. Base; 2. Rotating seat; 3. Lead screw; 4. Mounting bracket; 5. First motor; 6. Universal ball; 7. Disc wheel; 8. Fixed cylinder; 9. First fixed bracket; 10. Rotating bracket; 11. First screw; 12. Connecting seat; 13. Movable groove; 14. Movable block; 15. Auxiliary wheel; 16. Support leg; 17. Second motor; 18. First handwheel; 19. Movable plate; 20. Second handwheel; 21. Second screw; 22. Positioning block; 23. Rotating shaft; 24. Mounting plate; 25. Positioning groove; 26. Threaded rod; 27. Second fixed bracket; 28. Clamping plate; 29. ​​Anti-slip pad; 30. Slider; 31. Movable cylinder; 32. Limit groove; 33. Limiting block; 34. Slide groove; 35. Guide rod. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated components, elements, or parts to having a specific orientation, or to be constructed and operated in a specific orientation.

[0028] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0029] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two components, elements, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] like Figure 1-7As shown, the vehicle frame positioning fixture includes a base 1, a rotating frame 10, and two mounting plates 24. Rotating components are provided on both sides of the rotating frame 10. Each rotating component includes a second screw 21, a movable plate 19, and positioning blocks 22. A movable groove 13 is provided inside the rotating frame 10. The second screw 21 is threaded onto the rotating frame 10. A second handwheel 20 is fixedly installed at one end of the second screw 21, and the other end of the second screw 21 extends to the movable groove 13 and is rotatably connected to the movable plate 19 via a bearing. Two positioning blocks 22 are fixedly installed on one side of the movable plate 19. Multiple equally spaced positioning grooves 25 are provided on the mounting plate 24, and both positioning blocks 22 can be inserted into the multiple positioning grooves 25. The rotating frame 10 is provided with multiple adjustment components, including a fixed cylinder 8, a movable cylinder 31 and a first screw 11. The fixed cylinder 8 is fixedly installed inside the rotating frame 10. The first screw 11 is rotatably connected to the inside of the fixed cylinder 8 through a bearing. A first handwheel 18 is fixedly installed at one end of the first screw 11, and the other end of the first screw 11 extends into the inside of the fixed cylinder 8 and is threadedly connected to the movable cylinder 31.

[0032] In this technical solution, the bottom ends of the two movable cylinders 31 on the left and right sides are fixedly installed with connecting seats 12, and the interiors of the four connecting seats 12 are rotatably connected with universal balls 6. One end of each of the multiple universal balls 6 is fixedly installed with a second fixing frame 27, and the bottom ends of the two movable cylinders 31 in the middle are fixedly installed with a first fixing frame 9.

[0033] In this technical solution, both the first fixing frame 9 and the second fixing frame 27 are equipped with fixing components inside. The fixing components include threaded rods 26, clamping plates 28, and anti-slip pads 29. The first fixing frame 9 and the second fixing frame 27 are both threadedly connected to the threaded rods 26. One end of each of the multiple threaded rods 26 is fixedly mounted with a disc wheel 7, and the other end of each of the multiple threaded rods 26 is rotatably connected to the clamping plate 28 through a bearing. One side of each of the multiple clamping plates 28 is provided with an anti-slip pad 29. The presence of the anti-slip pad 29 increases the friction between the clamping plate 28 and the frame, effectively preventing the frame from sliding or shifting during processing, further improving the stability of the fixing, and ensuring the smooth progress of the processing.

[0034] In this technical solution, the first fixing frame 9 and the second fixing frame 27 are both provided with sliding grooves 34 inside, and sliders 30 are fixedly installed on one side of each of the multiple clamping plates 28. The sliders 30 are all slidably connected to the sliding grooves 34 to prevent the threaded rod 26 from rotating and causing the clamping plates 28 to rotate.

[0035] In this technical solution, two limiting grooves 32 are provided on the inner walls of the multiple fixed cylinders 8, and two limiting blocks 33 are fixedly installed on the multiple movable cylinders 31. The two limiting blocks 33 are slidably connected to the limiting grooves 32.

[0036] In this technical solution, a second motor 17 is fixedly installed on the base 1, and the output shaft of the second motor 17 passes through the base 1 and is fixedly installed on the rotating seat 2.

[0037] In this technical solution, a plurality of auxiliary wheels 15 are fixedly installed at the bottom end of the rotating seat 2, and the bottom ends of the plurality of auxiliary wheels 15 abut against the base 1.

[0038] In this technical solution, two mounting brackets 4 are fixedly installed on the rotating seat 2. A first motor 5 is fixedly installed on each of the two mounting brackets 4. A lead screw 3 is rotatably connected inside the two mounting brackets 4 through bearings. A movable block 14 is threadedly connected to each of the two lead screws 3. A mounting plate 24 is fixedly installed on one side of each of the two movable blocks 14. A rotating shaft 23 is rotatably connected to each of the two mounting plates 24 through bearings. One end of each rotating shaft 23 is fixedly installed to the same rotating bracket 10.

[0039] In this technical solution, two guide rods 35 are fixedly installed inside each of the two mounting brackets 4, and the two movable blocks 14 are slidably connected to the two guide rods 35.

[0040] In this technical solution, four support legs 16 are fixedly installed at the bottom end of the base 1.

[0041] In use, all electrical components mentioned in this application are externally connected to a power supply and control switch. The electric vehicle frame is placed on the rotating seat 2 and located inside the rotating frame 10. The first handwheel 18 is rotated in sequence, which drives the first screw 11 to rotate and move simultaneously. With the cooperation of the limiting block 33 and the limiting groove 32, two movable cylinders 31 drive the first fixed frame 9 closer to the electric vehicle frame, and the other four movable cylinders 31 also drive the second fixed frame 27 closer to the electric vehicle frame. The adjusting component controls the movement distance and position of the fixed component, which can be finely adjusted according to the actual size of the electric vehicle frame to ensure that the frame is accurately fixed, thereby improving operating accuracy and work efficiency. It can flexibly change the position and spacing of the fixing components, making the tooling adaptable to various sizes of frames, so that the frame is subjected to balanced force, avoiding excessive local force that could lead to deformation, ensuring the stability of the fixing, and facilitating subsequent processing or assembly operations. The multiple second fixing brackets 27 are rotated to a suitable angle by the universal ball 6, and multiple disc wheels 7 are rotated in sequence. The disc wheels 7 drive the threaded rod 26 to rotate and move at the same time. With the cooperation of the slide groove 34 and the slider 30, multiple clamping plates 28 drive the anti-slip pads 29 to approach the electric vehicle frame, which can clamp the frame from multiple directions, so that the frame is subjected to uniform force, which helps to prevent the frame from deforming during processing and ensures the processing accuracy and quality of the frame. The omnidirectional ball 6 allows multiple second fixing brackets 27 to rotate freely within a certain range, better conforming to the irregular shape of the frame surface, enhancing the contact adaptability between the fixing components and the frame, and ensuring that the frame is stably fixed. The fixing components on the two first fixing brackets 9 are usually located in key parts of the frame, bearing the main support and fixing functions, ensuring a large contact area and stable connection between the fixing components and the frame, providing stronger clamping and support forces, and ensuring that the frame will not shake or shift during processing or assembly. The fixing components with omnidirectional balls 6 on both sides and the fixing components in the middle work together to achieve all-round, multi-level stable fixing of the electric vehicle frame, ensuring the safety and reliability of the frame during processing, assembly and other processes. Simultaneously, two first motors 5 are started, and the output shafts of both first motors 5 drive the lead screw 3 to rotate. With the cooperation of two guide rods 35, both lead screws 3 drive the movable block 14 to move along the surface of the lead screw 3, so that the two mounting plates 24 drive the rotating frame 10 to rise and fall. The rotating frame 10 can be adjusted to a precise height position according to actual needs, so that the rotating frame 10 can adapt to the positioning requirements of various vehicle frames. At the same time, the height of the rotating frame 10 can be flexibly adjusted according to the requirements of different processes to meet the needs of diverse processes. The second motor 17 is started, which drives the rotating seat 2 to rotate horizontally, so that the two mounting brackets 4 drive the rotating bracket 10 to rotate to the required angle in the horizontal direction. This allows the frame to be processed from various angles, avoiding blind spots caused by limited viewing angles, ensuring that every part of the frame can be fully processed and treated, improving the overall processing quality of the frame and increasing work efficiency. Rotate the second handwheel 20 to move both positioning blocks 22 away from the positioning groove 25, and rotate the rotating frame 10 to a suitable angle. Then, rotate the second handwheel 20 in the opposite direction to insert the two positioning blocks 22 into the suitable positioning groove 25. This allows the vertical angle of the rotating frame 10 to be adjusted according to actual needs, meeting the precise requirements of different processing or assembly processes for the frame angle and ensuring that the frame is in the optimal processing position. When the two positioning blocks 22 are inserted into the suitable positioning groove 25, the position of the rotating frame 10 can be accurately fixed, avoiding processing or assembly quality problems caused by angle deviation. It also ensures that the rotating frame 10 will not shake or shift during processing or assembly, improving processing stability, ensuring operator safety, and reducing the risk of accidents caused by frame shaking.

[0042] The advantages of this application are: 1. By setting the rotating component, the vertical angle of the rotating frame 10 can be adjusted according to actual needs, which can meet the precise requirements of different processing or assembly processes for the frame angle, ensuring that the frame is in the optimal processing position. When the two positioning blocks 22 are inserted into the appropriate positioning slots 25, the position of the rotating frame 10 can be accurately fixed, avoiding processing or assembly quality problems caused by angle deviation. It can also ensure that the rotating frame 10 will not shake or shift during processing or assembly, improving processing stability, ensuring the safety of operators, and reducing the risk of accidents caused by frame shaking. 2. By setting adjustment components and fixing components, rotating the first handwheel 18 in sequence allows the adjustment components to control the movement distance and position of the fixing components. This enables fine-tuning according to the actual size of the electric vehicle frame, ensuring precise fixing of the frame, improving operational accuracy and work efficiency. It also allows for flexible changes in the position and spacing of the fixing components, making the tooling adaptable to various frame sizes, ensuring balanced force on the frame, avoiding excessive local force that could lead to deformation, guaranteeing fixing stability, and facilitating subsequent processing or assembly operations. Rotating multiple disc wheels 7 in sequence causes multiple clamping plates 28 to move the anti-slip pads 29 closer to the electric vehicle frame, allowing for clamping of the frame from multiple directions, ensuring even force on the frame, helping to prevent deformation of the frame during processing, and guaranteeing the processing accuracy and quality of the frame. The presence of the anti-slip pads 29 increases the friction between the clamping plates 28 and the frame, effectively preventing the frame from sliding or shifting during processing, further improving fixing stability, and ensuring smooth processing. 3. By setting the universal ball 6 and the connecting seat 12, the universal ball 6 allows multiple second fixing brackets 27 to rotate freely within a certain range, which can better fit the irregular shape of the frame surface, enhance the contact adaptability between the fixing components and the frame, and ensure that the frame is stably fixed. The fixing components on the two first fixing brackets 9 are usually located in the key parts of the frame and bear the main support and fixing functions. They can ensure a large contact area and stable connection between the fixing components and the frame, provide stronger clamping force and support force, and ensure that the frame will not shake or shift during processing or assembly. The fixing components with universal balls 6 on both sides and the fixing components in the middle cooperate with each other to achieve all-round, multi-level stable fixing of the electric vehicle frame, ensuring the safety and reliability of the frame during processing, assembly and other processes.

[0043] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this application does not involve any improvement to the software and methods.

[0044] This utility model is not limited to the above-described embodiments. Any changes in its shape or structure fall within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A vehicle frame positioning fixture, comprising a base (1), a rotating frame (10), and two mounting plates (24), characterized in that: Rotating components are provided on both sides of the rotating frame (10). The rotating components include a second screw (21), a movable plate (19), and a positioning block (22). The rotating frame (10) has an internal movable groove (13). The rotating frame (10) is threadedly connected to the second screw (21). A second handwheel (20) is fixedly installed at one end of the second screw (21). The other end of the second screw (21) extends to the movable groove (13) and is rotatably connected to the movable plate (19) through a bearing. Two positioning blocks (22) are fixedly installed on one side of the movable plate (19). Multiple positioning grooves (25) are provided on the mounting plate (24) at equal intervals. Both positioning blocks (22) can be inserted into the multiple positioning grooves (25). The rotating frame (10) is provided with multiple adjustment components, including a fixed cylinder (8), a movable cylinder (31) and a first screw (11). The fixed cylinder (8) is fixedly installed inside the rotating frame (10). The first screw (11) is rotatably connected inside the fixed cylinder (8) through a bearing. A first handwheel (18) is fixedly installed at one end of the first screw (11). The other end of the first screw (11) extends into the interior of the fixed cylinder (8) and is threadedly connected to the movable cylinder (31).

2. The chassis positioning fixture as described in claim 1, characterized in that: The bottom ends of the two movable cylinders (31) on the left and right sides are fixedly installed with connecting seats (12), and the four connecting seats (12) are rotatably connected with universal balls (6). One end of each of the multiple universal balls (6) is fixedly installed with a second fixing frame (27), and the bottom ends of the two movable cylinders (31) in the middle are fixedly installed with a first fixing frame (9).

3. The chassis positioning fixture as described in claim 2, characterized in that: The first fixing frame (9) and the second fixing frame (27) are both provided with fixing components inside. The fixing components include threaded rods (26), clamping plates (28) and anti-slip pads (29). The first fixing frame (9) and the second fixing frame (27) are both threadedly connected to threaded rods (26). One end of each of the multiple threaded rods (26) is fixedly installed with a disc wheel (7). The other end of each of the multiple threaded rods (26) is rotatably connected to a clamping plate (28) through a bearing. One side of each of the multiple clamping plates (28) is provided with an anti-slip pad (29).

4. The chassis positioning fixture as described in claim 3, characterized in that: The first fixing frame (9) and the second fixing frame (27) are both provided with sliding grooves (34), and a slider (30) is fixedly installed on one side of each of the multiple clamping plates (28), and the slider (30) is slidably connected to the sliding groove (34).

5. The chassis positioning fixture as described in claim 1, characterized in that: Two limiting grooves (32) are provided on the inner wall of each of the multiple fixed cylinders (8), and two limiting blocks (33) are fixedly installed on each of the multiple movable cylinders (31). The two limiting blocks (33) are slidably connected to the limiting grooves (32).

6. The chassis positioning fixture as described in claim 1, characterized in that: A second motor (17) is fixedly installed on the base (1), and the output shaft of the second motor (17) passes through the base (1) and is fixedly installed on the rotating seat (2).

7. The chassis positioning fixture as described in claim 6, characterized in that: The bottom end of the rotating seat (2) is fixedly equipped with multiple auxiliary wheels (15), and the bottom ends of the multiple auxiliary wheels (15) abut against the base (1).

8. The chassis positioning fixture as described in claim 6, characterized in that: Two mounting brackets (4) are fixedly installed on the rotating seat (2). A first motor (5) is fixedly installed on each of the two mounting brackets (4). A lead screw (3) is rotatably connected inside the two mounting brackets (4) through a bearing. A movable block (14) is threadedly connected to each of the two lead screws (3). A mounting plate (24) is fixedly installed on one side of each of the two movable blocks (14). A rotating shaft (23) is rotatably connected to each of the two mounting plates (24) through a bearing. One end of each of the two rotating shafts (23) is fixedly installed to the same rotating bracket (10).

9. The chassis positioning fixture as described in claim 8, characterized in that: Two guide rods (35) are fixedly installed inside each of the two mounting brackets (4), and the two movable blocks (14) are slidably connected to the two guide rods (35).

10. The chassis positioning fixture as described in claim 1, characterized in that: The base (1) is fixedly installed with four legs (16) at its bottom end.

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