A self-tapping screw positioning device for automobiles

Abstract

This invention discloses an automotive self-tapping screw positioning device, including a positioning mechanism. The positioning mechanism includes a positioning plate, on which are provided a first X-axis positioning block, a Y-axis positioning block, a Z-axis positioning block, and multiple positioning holes adapted to the tightening tool socket head. The relative positions of each positioning surface correspond to the relative positions of the corresponding body skirt surfaces. The relative positions of each positioning hole and each positioning surface correspond to the relative positions of the corresponding self-tapping screws and the respective surfaces of the body skirt. The advantages of this invention are: it ensures accurate installation of the self-tapping screws, avoiding gap problems in subsequent parts due to self-tapping screw position deviations; the reinforcing sockets installed in each positioning hole guide the tightening tool, facilitating force application; and the locking mechanism allows for easy attachment and removal of the positioning mechanism to the body skirt, resulting in high work efficiency.

Description

Technical Field

[0001] This invention relates to the field of automotive assembly technology, and more specifically, to an automotive self-tapping screw positioning device. Background Technology

[0002] Self-tapping screws are commonly used parts in vehicle manufacturing, and tightening them using pneumatic or electric tools is a typical application scenario. One such application is the assembly of vehicle side skirt trim pieces, which requires tightening eight self-tapping screws to the body sheet metal. These eight screws serve a positioning function, ensuring the side skirt trim pieces are in the correct position. In the vehicle's coordinate system, each self-tapping screw has specific positional requirements (coordinates), therefore a positioning device is needed to ensure the screws are tightened to the correct position. Summary of the Invention

[0003] To solve at least one of the above-mentioned technical problems, the present invention provides an automotive self-tapping screw positioning device. The positioning device includes a positioning plate, on which are provided a first X-axis positioning block, a Y-axis positioning block, a Z-axis positioning block, and a plurality of positioning holes adapted to the tightening tool socket head. The relative position of each positioning surface is consistent with the relative position of the corresponding body skirt surface. The relative position of each positioning hole and each positioning surface is consistent with the relative position of the corresponding self-tapping screw installation position and the relative position of each surface of the body skirt. The self-tapping screw is tightened to the correct position through the positioning holes.

[0004] The present invention solves the technical problem by adopting the following technical solution:

[0005] A self-tapping screw positioning device for automobiles includes a positioning mechanism, wherein the positioning mechanism includes a positioning plate and a first X-axis positioning block, a Y-axis positioning block and a Z-axis positioning block disposed on the positioning plate;

[0006] The first X-direction positioning block is disposed at the front end of the positioning plate and has a first X-direction positioning surface, which is used to abut against the front end of the vehicle body skirt.

[0007] The Y-axis positioning block and the Z-axis positioning block are disposed in the middle of the positioning plate, and each has a Y-axis positioning surface and a Z-axis positioning surface. The Y-axis positioning surface is adapted to the Y-axis profile of the vehicle body skirt, and the Z-axis positioning surface is adapted to the Z-axis profile of the vehicle body skirt. The X-axis distance between the Y-axis positioning surface and the Z-axis positioning surface and the first X-axis positioning surface is consistent with the X-axis distance between the front end of the vehicle body skirt and the corresponding profile of the corresponding positioning surface of the vehicle body skirt.

[0008] The positioning plate is provided with multiple positioning holes adapted to the tightening tool socket head; the X-direction distance between each positioning hole and the first X-direction positioning surface and the corresponding installation position of each self-tapping screw are consistent with the X-direction distance of the front end of the vehicle body skirt; the Z-direction distance between each positioning hole and the Z-direction positioning surface and the corresponding installation position of each self-tapping screw are consistent with the Z-direction distance of the Z-direction profile of the vehicle body skirt corresponding to the Z-direction positioning surface.

[0009] Furthermore, the device includes a lower frame, an upper frame, and a locking mechanism;

[0010] The lower frame includes a base frame, two first longitudinal beams and two slide rails. The two first longitudinal beams are respectively located at both ends of the base frame in the X direction, and the two slide rails are respectively fixed to the two first longitudinal beams through a first connecting plate.

[0011] The upper frame includes multiple first sliders and two second longitudinal beams. Each first slider is connected to one of the two second longitudinal beams via a second connecting plate. The positioning plate is connected to the two second longitudinal beams via two third connecting plates. The first sliders are slidably connected to the corresponding slide rails. The locking mechanism is used to lock the first sliders so that the positioning mechanism can be adapted to the height of the vehicle body skirt.

[0012] Furthermore, the locking mechanism includes a crossbar, a second slider, a helical spring, and a limiting structure, with both ends of the crossbar connected to two second longitudinal beams via a fourth connecting plate;

[0013] The second slider comprises multiple sliders, which are slidably connected to two slide rails respectively; the lower end of the helical spring is connected to the second slider and the second longitudinal beam through the fifth connecting plate, and the upper end is connected to the first connecting plate through the sixth connecting plate, and the helical spring is in a stretched state;

[0014] The limiting structure includes a first limiting plate and a locking pin. The first limiting plate is disposed on a first connecting plate, and a pin seat is disposed on the fourth connecting plate. One end of the locking pin passes through the pin seat, and the other end of the locking pin is connected to a pull rope, which is connected to a release handle. When the release handle is squeezed, the locking pin retracts into the pin seat. When the release handle is released, the locking pin extends out of the pin seat to below the first limiting plate, facilitating the installation and disassembly of the positioning device.

[0015] Furthermore, the positioning device also includes a gas spring, and a first crossbeam is provided between the two first longitudinal beams. One end of the gas spring is connected to the first crossbeam, and the other end is connected to the first slider to provide buffer protection during operation.

[0016] Furthermore, a second limiting plate is provided at both the upper and lower ends of the two slide rails to prevent the sliders from moving out of the slide rails.

[0017] Furthermore, a reinforcing sleeve is provided in the positioning hole; preferably, the inner diameter of the reinforcing sleeve is 0.1-0.3mm larger than the outer diameter of the tightening tool sleeve head, which can guide and limit the tightening direction of the tightening tool.

[0018] Furthermore, the Y-axis positioning block and the Z-axis positioning block are integrated into one unit, which is convenient to design and has a simple structure.

[0019] Furthermore, the Z-axis positioning surface of the Z-axis positioning block is provided with a clearance groove to ensure accurate positioning of the Z-axis positioning surface.

[0020] Furthermore, the positioning mechanism also includes a second X-direction positioning block, which is disposed at the rear end of the positioning plate and has a second X-direction positioning surface. The distance between the second X-direction positioning surface and the first X-direction positioning surface is 5-30mm larger than the length of the vehicle body skirt, so as to make it easy to roughly align the Y-direction positioning block and the Z-direction positioning block with the corresponding positions of the vehicle body skirt.

[0021] Furthermore, the lower frame is provided with a storage slot, the two ends of which are respectively connected to two first longitudinal beams, which can be used to store self-tapping screws and tightening tools.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] (1) For self-tapping screws that require precise positioning, positioning equipment can ensure accurate installation position and avoid the problem of gap in subsequent parts due to the position deviation of the self-tapping screw.

[0024] (2) Each positioning hole is equipped with a reinforcing sleeve. The reinforcing sleeve is designed with a clearance fit with the tightening tool. When tightening, it can guide the tightening tool, making it easier to apply force and improving ergonomics.

[0025] (3) The locking mechanism can be easily attached to the body skirt and removed, which is efficient, reduces installation time, and meets the production cycle requirements. Attached Figure Description

[0026] To better understand the above and other objects, features, advantages, and functions of the present invention, reference can be made to the embodiments shown in the accompanying drawings. The same reference numerals in the drawings refer to the same parts. Those skilled in the art should understand that the drawings are intended to schematically illustrate preferred embodiments of the invention and do not limit the scope of the invention in any way; the parts in the drawings are not drawn to scale.

[0027] Figure 1 This is a schematic diagram of the structure of the automotive self-tapping screw positioning device of the present invention.

[0028] Figure 2 This is a schematic diagram of the automotive self-tapping screw positioning device of the present invention from another perspective.

[0029] Figure 3 This is an enlarged structural schematic diagram of invention A.

[0030] Figure 4 This is an enlarged structural schematic diagram of the present invention B.

[0031] Figure 5 This is an enlarged structural schematic diagram of the present invention C.

[0032] Figure 6 This is a schematic diagram of the structure of the self-tapping screw positioning device for automobiles according to the present invention during use.

[0033] Figure 7 This is a schematic diagram of the tightening tool.

[0034] In the diagram: 10-Positioning plate; 11-First X-direction positioning block; 111-First X-direction positioning surface; 12-YZ positioning block; 121-Y-direction positioning surface; 122-Z-direction positioning surface; 1221-Allowing groove; 13-Positioning hole; 14-Reinforcing sleeve; 15-Second X-direction positioning block; 151-Second X-direction positioning surface; 21-Base frame; 221-First longitudinal beam; 222-Second longitudinal beam; 23-Slide rail; 241-First slider; 242-Second slider; 25-Crossbar; 261-First connecting plate; 26 2-Second connecting plate; 263-Third connecting plate; 264-Fourth connecting plate; 265-Fifth connecting plate; 266-Sixth connecting plate; 27-Helical spring; 28-First limiting plate; 29-Locking pin; 210-Pin seat; 211-Pull rope; 212-Release handle; 213-Gas spring; 214-First crossbeam; 215-Second limiting plate; 216-Storage slot; 217-Universal wheel; 30-Tightening tool; 31-Socket head; 40-Body white; 41-Body skirt; 50-Self-tapping screw. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, exemplary embodiments of this disclosure are described below with reference to the accompanying drawings, including various details of the embodiments to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this disclosure. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0036] In the description of this invention, it should be noted that the term "comprising" and its variations indicate an open-ended inclusion, i.e., "including but not limited to". The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The directions "X", "Y", and "Z" are defined with the vehicle's direction of travel as the X direction, the direction from the driver's side to the passenger side as the Y direction, and the vehicle's height direction as the Z direction. Furthermore, in the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] This invention provides a self-tapping screw positioning device for automobiles, referenced. Figures 1-3 As shown, a positioning mechanism is included, comprising a positioning plate 10 and a first X-direction positioning block 11, a Y-direction positioning block, and a Z-direction positioning block disposed on the positioning plate 10. The first X-direction positioning block 11 is disposed at the front end of the positioning plate 10 and has a first X-direction positioning surface 111. The first X-direction positioning surface 111 is used to abut against the front end of the vehicle body skirt 41 and can limit the X-direction of the positioning mechanism.

[0038] The Y-axis positioning block and the Z-axis positioning block are disposed in the middle of the positioning plate 10, and each has a Y-axis positioning surface 121 and a Z-axis positioning surface 122. The Y-axis positioning surface 121 is adapted to the Y-axis profile of the body skirt 41, and the Z-axis positioning surface 122 is adapted to the Z-axis profile of the body skirt 41. The Y-axis positioning surface 121 and the Z-axis positioning surface 122 are designed to conform to the body skirt 41, so as to completely fit the area of ​​the body skirt 41 and realize the precise Y-axis and Z-axis positioning of the positioning mechanism. The X-axis distance between the Y-axis positioning surface 121 and the Z-axis positioning surface 122 and the first X-axis positioning surface 111 is consistent with the X-axis distance between the front end of the body skirt 41 and the corresponding profile of the body skirt 41 corresponding to the positioning surface. Specifically, the X-direction distance between the Y-direction positioning surface 121 and the first X-direction positioning surface 111 is consistent with the X-direction distance between the front end of the body skirt 41 and the Y-direction profile of the body skirt 41 corresponding to the Y-direction positioning surface 121; the X-direction distance between the Z-direction profile of the Z-direction positioning block and the first X-direction positioning surface 111 is consistent with the X-direction distance between the front end of the body skirt 41 and the Z-direction profile of the body skirt 41 corresponding to the Z-direction positioning surface 122. Thus, the X-direction distance between the Y-direction positioning surface 121 and the Z-direction positioning surface 122 is simultaneously consistent with the distance between the corresponding Y-direction and Z-direction profiles of the body skirt 41, ensuring that the relative positions of the positioning surfaces of each positioning block are consistent with the relative positions of the profiles of the body skirt 41 corresponding to each positioning surface. Since the body skirt 41 is relatively long, two Y-direction positioning blocks and two Z-direction positioning blocks can be set to ensure accurate and stable Y-direction and Z-direction positioning.

[0039] Preferably, such as Figure 3As shown, the Y-axis positioning block and the Z-axis positioning block are integrally formed to form the YZ positioning block 12. In this way, the same YZ positioning block 12 can be used to position in both the Y and Z directions simultaneously, resulting in a simpler structure. It eliminates the need to consider the X-axis spacing between the Y-axis and Z-axis positioning blocks, making the design more convenient, reducing assembly errors, and improving positioning accuracy.

[0040] The positioning plate 10 is provided with a plurality of positioning holes 13 that are adapted to the socket head 31 of the tightening tool 30; the X-direction distance between each positioning hole 13 and the first X-direction positioning surface 111 and the installation position of each corresponding self-tapping screw 50 are consistent with the X-direction distance of the front end of the body skirt 41; the Z-direction distance between each positioning hole 13 and the Z-direction positioning surface 122 and the installation position of each corresponding self-tapping screw 50 are consistent with the Z-direction distance of the Z-direction profile of the body skirt 41 corresponding to the Z-direction positioning surface 122, so as to ensure that the X-direction position and Z-direction position of each positioning hole 13 are accurate.

[0041] refer to Figure 6 and Figure 7 As shown, when the body-in-white 40 is transported to the self-tapping screw 50 installation station via a sliding plate, the operator engages the positioning device with the body skirt 41, so that the X-direction positioning surface of the first X-direction positioning block 11 abuts against the front end of the body skirt 41, the Y-direction positioning surface 121 of the Y-direction positioning block conforms to the Y-direction profile of the body skirt 41, and the Z-direction positioning surface 122 of the Z-direction positioning block conforms to the Z-direction profile of the body skirt 41, thus positioning the mechanism is in place. The self-tapping screw 50 is then inserted into the socket head 31 of the tightening tool 30. The socket head 31 passes through the positioning hole 13, allowing the self-tapping screw 50 to be installed on the body skirt 41 below the sill of the body-in-white 40. The installation positions of each self-tapping screw 50 are consistent with the overall vehicle coordinates, achieving automatic positioning of the self-tapping screw 50 and ensuring that the self-tapping screw 50 is installed in the correct position on the body skirt 41, guaranteeing the correct position of the side skirt trim. When installing the self-tapping screw 50, the slide plate continues to move forward, which can make the front end of the body skirt 41 press against the first X-direction positioning surface 111, preventing the positioning mechanism from shifting and improving the positioning accuracy.

[0042] In one embodiment, such as Figure 1 and Figure 2 As shown, the device includes a lower frame, an upper frame, and a locking mechanism. The lower frame includes a base frame 21, two first longitudinal beams 221, and two slide rails 23. The two first longitudinal beams 221 are respectively located at both ends of the base frame 21 in the X direction, and the two slide rails 23 are respectively fixed to the two first longitudinal beams 221 via first connecting plates 261. The base frame 21 can adopt an "I"-shaped structure, supplemented by reinforcing rods, to ensure the overall strength of the device and its stability during use. Multiple casters 217 can be installed at the bottom of the base frame 21, allowing the device to move in the X and Y directions, facilitating the movement of the positioning device to the installation position.

[0043] The upper frame includes multiple first sliders 241 and two second longitudinal beams 222. Each first slider 241 is connected to one of the two second longitudinal beams 222 via a second connecting plate 262. Preferably, there can be two first sliders 241, each connected to one of the two second longitudinal beams 222 via two second connecting plates 262. To improve the rigidity of the upper frame, multiple second crossbeams can be provided between the two second longitudinal beams 222. The positioning plate 10 is connected to the two second longitudinal beams 222 via two third connecting plates 263. Preferably, the third connecting plate 263 can be T-shaped, including a cross plate and a longitudinal plate. The third connecting plate 263 is located at the YZ positioning block 12, which can be connected to one end of the cross plate. The positioning plate 10 can be a rectangular plate connected to the other end of the cross plate via a base, and the longitudinal plate can be connected to the second longitudinal beam 222. In this way, the YZ positioning block 12 can be simultaneously fixedly connected to the positioning plate 10 and the second longitudinal beam 222 via the third connecting plate 263. The first slider 241 is slidably connected to the corresponding slide rail 23. When the first slider 241 moves up and down along the slide rail 23, it can drive the second longitudinal beam 222 and the positioning plate 10 to move up and down. That is, the upper frame and the positioning plate 10 can move up and down along the slide rail 23, so that the positioning mechanism can be adapted to the height of the vehicle body skirt 41, which facilitates the installation and disassembly of the positioning equipment. The locking mechanism is used to lock the first slider 241 and limit the first slider 241.

[0044] In one embodiment, such as Figure 4 and Figure 5As shown, the locking mechanism includes a crossbar 25, a second slider 242, a helical spring 27, and a limiting structure. Both ends of the crossbar 25 are connected to two second longitudinal beams 222 via a fourth connecting plate 264. The fourth connecting plate 264 can be connected to the second connecting plate 262, and the crossbar 25 is simultaneously connected to the first slider 241 and the second longitudinal beam 222. Multiple second sliders 242 are included; preferably, two second sliders 242 are provided, each slidably connected to two slide rails 23. The lower end of the helical spring 27 is connected to the second slider 242 and the second longitudinal beam 222 via a fifth connecting plate 265, and the upper end is connected to the first connecting plate 261 via a sixth connecting plate 266. The helical spring 27 is in a stretched state. The second slider 242 is simultaneously connected to the lower end of the helical spring 27 and the second longitudinal beam 222 via the fifth connecting plate 265. The first slider 241, the second slider 242, and the second longitudinal beam 222 form an integral structure. The limiting structure includes a first limiting plate 28 and a locking pin 29. The first limiting plate 28 is disposed on a first connecting plate 261. A pin seat 210 is disposed on a fourth connecting plate 264. One end of the locking pin 29 passes through the pin seat 210, and the other end of the locking pin 29 is connected to a pull rope 211. The pull rope 211 is connected to a release handle 212. When the release handle 212 is squeezed, the locking pin 29 retracts into the pin seat 210. When the release handle 212 is released, the locking pin 29 extends out of the pin seat 210 and extends below the first limiting plate 28.

[0045] When the positioning device is not in use, the release handle 212 is in the released state, the locking pin 29 extends out of the pin seat 210 to below the first limiting plate 28, and the first slider 241, the second slider 242, the second longitudinal beam 222, and the positioning mechanism are at their initial height. The Z-direction surface at the bottom of the body skirt 41 is a curved structure, and the Z-direction positioning surface 122 of the Z-direction positioning block is correspondingly set as a curved structure. When the Z-direction positioning block positions the body skirt 41 in the Z direction, it needs to be moved from below the body skirt 41 upwards until it fits against the Z-direction surface of the body skirt 41. Therefore, the initial height of the positioning mechanism is lower than the height of the body skirt 41. When the body-in-white 40 runs to the self-tapping screw 50 installation station and the positioning device is used to install the self-tapping screw 50, the release handle 212 is squeezed, and the rope 211 pulls the locking pin 29 back into the pin seat 210. When the coil spring 27 is in the stretched state, the locking pin 29 has retracted into the pin seat 210. The coil spring 27 contracts, pulling the second slider 242 upward. The second slider 242, along with the second longitudinal beam 222 and the first slider 241, moves upward, thereby moving the positioning plate 10 upward until the Z-direction positioning surface 122 of the Z-direction positioning block conforms to the Z-direction profile of the body skirt 41. At this point, the second slider 242 stops moving upward. The positioning mechanism is now in place, and the positioning holes 13 are positioned.

[0046] When removing the tools from the body-in-white 40 after installing the self-tapping screws 50, press the crossbar 25 directly, or squeeze the release handle 212 and then press the crossbar 25. The crossbar 25 moves downward along with the first slider 241 and the second longitudinal beam 222. The second longitudinal beam 222 moves downward along with the positioning plate 10, separating it from the body skirt 41. Once the crossbar 25 is below the first limit plate 28, release the crossbar 25. The coil spring 27 contracts, pulling the second slider 242 upward. The second slider 242 moves upward along with the second longitudinal beam 222 until the locking pin 29 abuts against the first limit plate 28, thus resetting the positioning plate 10. The upper frame is driven by the coil spring 27, which is convenient to operate, improves work efficiency, reduces installation time, and adapts to production cycle requirements.

[0047] One helical spring 27 can be used, but two helical springs 27 are preferable to ensure smooth movement of the positioning mechanism. They are respectively installed at both ends of the upper frame. One limiting structure is sufficient for easy operation. Each slide rail 23 can be fixedly installed on the corresponding first longitudinal beam 221 through multiple first connecting plates 261, so that the slide rail 23 and the first longitudinal beam 221 are reliably and firmly connected. The first limiting plate 28 can be installed on the upper first connecting plate 261.

[0048] In one embodiment, such as Figure 5 As shown, the positioning device also includes a gas spring 213. A first crossbeam 214 is provided between the two first longitudinal beams 221. One end of the gas spring 213 is connected to the first crossbeam 214, and the other end is connected to the first slider 241. When the crossbar 25 is pressed down, the first slider 241 moves downward, pressing the gas spring 213 down, and the second slider 242 moves downward, stretching the helical spring 27 downward. After the crossbar 25 is released, the helical spring 27 retracts, pulling the second slider 242 upward. The second slider 242 drives the first slider 241 upward, and the first slider 241 pulls the gas spring 213 upward. The gas spring 213 can provide cushioning during operation. When the helical spring 27 comes out during operation, the gas spring 213 can also provide cushioning protection to prevent excessive movement of the upper frame and collision between the slider and the fifth connecting plate 265 and the lower frame. To keep the positioning mechanism stable during movement, two gas springs 213 can be provided, one at each end of the upper frame. The base frame 21, all longitudinal beams and transverse beams can be made of square steel pipes to reduce the weight of the positioning equipment.

[0049] In one embodiment, a second limiting plate 215 is provided at the upper and lower ends of both slide rails 23 to prevent each slider from moving out of the slide rail 23.

[0050] When installing the self-tapping screw 50, the tightening tool 30 vibrates violently. To prevent the self-tapping screw 50 from disengaging from the tightening tool 30, it is necessary to press the tightening tool 30 firmly. To reduce the weight of the equipment, the positioning plate 10 is made of aluminum alloy. To prevent wear and deformation of the positioning plate 10, a reinforcing sleeve 14 can be provided in the positioning hole 13. The reinforcing sleeve 14 can be a steel sleeve, capable of withstanding the pressure applied by the tightening tool 30.

[0051] The size of the positioning hole 13 can be designed with reference to the tightening tool 30. The positioning hole 13 and the sleeve head 31 of the cylindrical front end of the tightening tool 30 are clearance-fitted. Preferably, the inner diameter of the reinforcing sleeve 14 is 0.1-0.3 mm larger than the outer diameter of the sleeve head 31 of the tightening tool 30. The inner diameter of the reinforcing sleeve 14 is slightly larger than the outer diameter of the sleeve head 31 of the tightening tool 30. For example, the inner diameter of the reinforcing sleeve 14 can be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, or 0.3 mm larger than the outer diameter of the sleeve head 31 of the tightening tool 30. In this way, when the tightening tool 30 passes through the reinforcing sleeve 14, the reinforcing sleeve 14 can guide and limit the tightening tool 30, resulting in a smaller positional deviation and improving the installation accuracy of the self-tapping screw 50. The X-axis positioning block, Y-axis positioning block, and Z-axis positioning block are located on the same side of the positioning plate 10. When in use, this positioning device maintains a gap between the positioning plate 10 and the vehicle body skirt 41. The length of the reinforcing sleeve 14 can also be increased to further guide and limit the screwing direction of the tightening tool 30, facilitating the application of force when tightening the self-tapping screw 50, preventing positional deviation caused by vibration of the tightening tool 30, and improving the ergonomic experience. The reinforcing sleeve 14 can be detachably connected to the positioning plate 10 via its flange face, preventing wear on the positioning plate 10 when the tightening tool 30 directly contacts it. The reinforcing sleeve 14 is also easy to replace if it becomes worn or damaged.

[0052] To improve the overall sealing and waterproofing performance of the vehicle, adhesive is applied to the body during the manufacturing process. Residual adhesive accumulates at the bottom of the body under gravity, particularly at the bottom of the body skirt 41. To improve the accuracy of the Z-axis positioning of this positioning device, such as... Figure 3 As shown, a clearance groove 1221 can be provided on the Z-direction positioning surface 122 of the Z-direction positioning block to accommodate residual adhesive within the clearance groove 1221, thereby preventing the residual adhesive from lowering the Z-direction positioning surface 122.

[0053] In one embodiment, the positioning mechanism further includes a second X-direction positioning block 15, which is disposed at the rear end of the positioning plate 10 and has a second X-direction positioning surface 151. The distance between the second X-direction positioning surface 151 and the first X-direction positioning surface 111 is 5-30 mm larger than the length of the vehicle body skirt 41. For example, the distance between the second X-direction positioning surface 151 and the first X-direction positioning surface 111 is 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, or 30 mm larger than the length of the vehicle body skirt 41. In this way, the distance between the second X-direction positioning surface 151 and the first X-direction positioning surface 111 is slightly larger than the length of the vehicle body skirt 41, and the second X-direction positioning block 15 can assist in positioning the rear end of the vehicle body skirt 41, making it easier to lock the positioning mechanism onto the vehicle body skirt 41. At the same time, it can make the Y-direction positioning block and the Z-direction positioning block approximately aligned with the corresponding positions of the vehicle body skirt 41, improving operational efficiency.

[0054] The second X-axis positioning block 15 and the first X-axis positioning block 11 can use the same positioning block. The two X-axis positioning blocks can be L-shaped, with one side serving as a mounting portion fixed to one side of the positioning plate 10, and the other side serving as a positioning portion perpendicular to the mounting plate. A through hole is provided in the mounting portion, and an elongated hole extending along the X-axis and matching the through hole is provided in the positioning plate 10. Moving the second X-axis positioning block 15 along the elongated hole can adjust the distance between the second X-axis positioning surface 151 and the first X-axis positioning surface 111.

[0055] In one embodiment, the lower frame is provided with a storage slot 216, the two ends of which are respectively connected to two first longitudinal beams 221. The storage slot 216 can store self-tapping screws 50 and tightening tools 30, making it convenient to access the self-tapping screws 50 and operate easily.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-tapping screw positioning device for automobiles, characterized in that, The system includes a positioning mechanism, which comprises a positioning plate and a first X-axis positioning block, a Y-axis positioning block, and a Z-axis positioning block disposed on the positioning plate. The first X-direction positioning block is disposed at the front end of the positioning plate and has a first X-direction positioning surface, which is used to abut against the front end of the vehicle body skirt. The Y-axis positioning block and the Z-axis positioning block are disposed in the middle of the positioning plate, and each has a Y-axis positioning surface and a Z-axis positioning surface. The Y-axis positioning surface is adapted to the Y-axis profile of the vehicle body skirt, and the Z-axis positioning surface is adapted to the Z-axis profile of the vehicle body skirt. The X-axis distance between the Y-axis positioning surface and the Z-axis positioning surface and the first X-axis positioning surface is consistent with the X-axis distance between the front end of the vehicle body skirt and the corresponding profile of the corresponding positioning surface of the vehicle body skirt. The positioning plate is provided with multiple positioning holes adapted to the tightening tool socket head; the X-direction distance between each positioning hole and the first X-direction positioning surface and the corresponding installation position of each self-tapping screw are consistent with the X-direction distance of the front end of the vehicle body skirt; the Z-direction distance between each positioning hole and the Z-direction positioning surface and the corresponding installation position of each self-tapping screw are consistent with the Z-direction distance of the Z-direction profile of the vehicle body skirt corresponding to the Z-direction positioning surface.

2. The automotive self-tapping screw positioning device according to claim 1, characterized in that, The device includes a lower frame, an upper frame, and a locking mechanism; The lower frame includes a base frame, two first longitudinal beams and two slide rails. The two first longitudinal beams are respectively located at both ends of the base frame in the X direction, and the two slide rails are respectively fixed to the two first longitudinal beams through a first connecting plate. The upper frame includes multiple first sliders and two second longitudinal beams. Each first slider is connected to one of the two second longitudinal beams via a second connecting plate. The positioning plate is connected to one of the two second longitudinal beams via two third connecting plates. The first sliders are slidably connected to corresponding slide rails. The locking mechanism is used to lock the first sliders.

3. The automotive self-tapping screw positioning device according to claim 2, characterized in that, The locking mechanism includes a crossbar, a second slider, a helical spring, and a limiting structure. The two ends of the crossbar are respectively connected to two second longitudinal beams through a fourth connecting plate. The second slider comprises multiple sliders, which are slidably connected to two slide rails respectively; the lower end of the helical spring is connected to the second slider and the second longitudinal beam through the fifth connecting plate, and the upper end is connected to the first connecting plate through the sixth connecting plate, and the helical spring is in a stretched state; The limiting structure includes a first limiting plate and a locking pin. The first limiting plate is disposed on a first connecting plate. A pin seat is disposed on the fourth connecting plate. One end of the locking pin passes through the pin seat, and the other end of the locking pin is connected to a pull rope. The pull rope is connected to a release handle. When the release handle is squeezed, the locking pin retracts into the pin seat. When the release handle is released, the locking pin extends out of the pin seat and extends below the first limiting plate.

4. The automotive self-tapping screw positioning device according to claim 3, characterized in that, The positioning device also includes a gas spring, and a first crossbeam is provided between the two first longitudinal beams. One end of the gas spring is connected to the first crossbeam, and the other end is connected to the first slider.

5. The automotive self-tapping screw positioning device according to claim 2 or 3, characterized in that, Both of the slide rails are provided with a second limiting plate at their upper and lower ends.

6. The automotive self-tapping screw positioning device according to claim 1, characterized in that, A reinforcing sleeve is provided in the positioning hole; the inner diameter of the reinforcing sleeve is 0.1-0.3 mm larger than the outer diameter of the tightening tool sleeve head.

7. The automotive self-tapping screw positioning device according to claim 1, characterized in that, The Y-axis positioning block and the Z-axis positioning block are integrated into one unit.

8. The automotive self-tapping screw positioning device according to claim 1 or 7, characterized in that, The Z-axis positioning surface of the Z-axis positioning block is provided with an avoidance groove.

9. The automotive self-tapping screw positioning device according to claim 1, characterized in that, The positioning mechanism further includes a second X-direction positioning block, which is disposed at the rear end of the positioning plate and has a second X-direction positioning surface. The distance between the second X-direction positioning surface and the first X-direction positioning surface is 5-30mm greater than the length of the vehicle body skirt.

10. The automotive self-tapping screw positioning device according to claim 2, characterized in that, The lower frame is provided with a storage slot, and the two ends of the storage slot are respectively connected to two first longitudinal beams.

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