Positioning device and production line

Abstract

This invention relates to the field of automotive manufacturing technology, specifically to a positioning device and production line. The positioning device includes a base frame, a sliding mechanism, and a positioning mechanism. The sliding mechanism includes at least two sets of sliding units, which are disposed on the base frame and spaced apart along the length of the base frame. Each set of sliding units can slide independently along the length of the base frame. Each sliding unit has a positioning mechanism on its upper surface at both ends along its length, and the positioning mechanism can rotate along the plane containing the upper surface of the sliding unit. The positioning mechanism engages with the vehicle body to fix the vehicle body in place. The positioning device and production line provided by this invention can complete vehicle model switching without disassembling and replacing the entire set of positioning units, significantly shortening the changeover time, reducing the construction cost of the production line, and adapting to the flexible requirements of multi-vehicle mixed-flow production.

Description

Technical Field

[0001] This invention relates to the field of automobile manufacturing technology, specifically to a positioning device and production line. Background Technology

[0002] In the automobile manufacturing process, various tooling mechanisms are widely used in welding, final assembly and other production lines to support and precisely position the car body in order to ensure the processing accuracy of welding, assembly and other processes.

[0003] Currently, fixed positioning structures are typically designed for specific car models. However, when the production line switches to produce different models, the fixed positioning structures have limited adjustment range, often requiring the entire structure to be disassembled and replaced. This is time-consuming, labor-intensive, and impacts production efficiency. It is therefore unsuitable for the needs of multi-model mixed-flow production. Summary of the Invention

[0004] (I) The technical problem to be solved by this invention is that when existing production lines switch between producing different car models, the positioning structure is mostly a fixed structure with a limited range of position adjustment for the positioning components. This often requires disassembling and replacing the entire positioning structure, resulting in time and labor costs and impacting production efficiency. This makes it difficult to meet the needs of multi-model mixed-flow production.

[0005] (II) Technical Solution To address the aforementioned technical problems, embodiments of the present invention provide a positioning device for fixing the car body during automobile manufacturing, comprising a base frame, a sliding mechanism, and a positioning mechanism; The sliding mechanism includes at least two sets of sliding units, which are disposed on the base frame and spaced apart along the length of the base frame. Each set of sliding units can slide independently along the length of the base frame. Each of the sliding units is provided with a positioning mechanism on the upper surface at both ends along its own length direction, and the positioning mechanism is capable of rotating along the plane where the upper surface of the sliding unit is located; The positioning mechanism engages with the vehicle body to secure the vehicle body.

[0006] Furthermore, the positioning mechanism includes a positioning base, a rotating platform, and a positioning assembly; The base is connected to the sliding unit, and the top of the base is provided with the rotating platform, which can rotate along the plane of the upper surface of the base. The positioning component is disposed on the rotating platform, and the positioning component can slide along the length direction of the rotating platform.

[0007] Furthermore, the bottom of the rotating platform is provided with a rotating plate, and the positioning base is connected to the rotating plate, and the positioning base can rotate relative to the rotating plate.

[0008] Furthermore, the positioning component includes a positioning slide, a positioning pin, and a lower slider; The top of the rotating platform is provided with a rotating slide groove, the side of the rotating platform opposite to the rotating slide groove is provided with a lower slide groove, the bottom of the rotating slide groove is provided with a rotating through groove, the positioning slide is slidably connected to the rotating slide groove, and the lower slider is slidably connected to the lower slide groove. The lower slider is provided with a locking screw hole, and the locking bolt passes through the rotating table and the rotating through groove, and is threadedly connected to the locking screw hole; The positioning pin is located on the top of the positioning slide, and the positioning pin is used to engage with the pre-set process hole in the vehicle body.

[0009] Furthermore, the positioning mechanism also includes a transmission assembly; The transmission component is located inside the positioning base and is also connected to the rotating plate. The transmission component can drive the positioning base and the rotating plate to rotate relative to each other.

[0010] Furthermore, the transmission assembly includes a positioning shaft, an adjusting worm gear, and an adjusting worm. The positioning base has a positioning mounting groove along its own height direction, and the opening of the positioning mounting groove faces the rotating plate. The positioning shaft is located in the positioning mounting groove, and the top end of the positioning shaft is connected to the rotating plate. The adjusting worm gear is sleeved on the outer side of the positioning shaft. The positioning shaft and the adjusting worm gear rotate synchronously. The adjusting worm gear is engaged with the adjusting worm. The end of the adjusting worm extends outward through the positioning base.

[0011] Furthermore, the side wall of the positioning base is provided with a side groove, the bottom of the side groove is provided with a side slot, a rotating hole is formed in the side slot, and the end of the adjusting worm extends outward of the positioning base through the rotating hole. A rotating block is fixed to the end of the adjusting worm gear located outside the positioning base.

[0012] Furthermore, a side protrusion is fixed in the side groove, and the side protrusion has a through side rotating hole that communicates with the rotating hole. One end of the adjusting worm passes through the rotating hole and meshes with the adjusting worm wheel, while the other end is inserted into the side rotating hole. The adjusting worm gear passes through the side rotating hole and has a rotating block at its end located outside the positioning base.

[0013] Furthermore, a base plate is provided between the positioning base and the rotating plate, and the base plate can completely cover the positioning mounting groove; The substrate has a bearing groove, a base bearing is provided in the bearing groove, and a through hole is provided at the bottom of the bearing groove. The end of the positioning shaft passes through the through hole and is connected to the base bearing.

[0014] Furthermore, the positioning mechanism also includes a braking assembly; The brake assembly is located in the positioning mounting groove and can move along the height direction of the positioning mounting groove to move closer to or further away from the adjusting worm gear. The brake assembly can engage with the adjusting worm gear to limit the rotation of the adjusting worm gear.

[0015] Furthermore, the brake assembly includes a brake element and a brake spring; Both the brake component and the brake spring are sleeved on the outer wall of the positioning shaft. The brake component can slide along the height direction of the positioning shaft. One end of the brake spring abuts against the base plate, and the other end abuts against the brake component. The brake component has a brake block on the side facing the adjusting worm gear, and the adjusting worm gear has an extension ring on the side facing the brake component. The top of the extension ring has a brake groove that matches the brake block, and the brake block can be inserted into or removed from the brake groove.

[0016] Furthermore, the brake assembly also includes a brake slide bracket; The brake sliding bracket is sleeved on the outside of the brake component, and the brake sliding bracket can drive the brake component to move synchronously; The brake sliding frame has a lever on its side wall, and the positioning base has an adjustment hole on its side wall. The lever extends outward through the adjustment hole and can move along the extension direction of the adjustment hole.

[0017] Furthermore, a sliding groove is provided on the inner side wall of the positioning mounting groove, and a sliding member is provided on the outer wall of the brake component, the sliding member being able to slide and engage with the sliding groove.

[0018] Furthermore, the sliding unit includes a slide rod and a slide base; The slide rod has slide seats at both ends, and each slide seat has a sliding groove. The slide seat is slidably connected to the base frame through the sliding groove.

[0019] Furthermore, the base frame includes long rods and short rods; Two long poles are arranged at intervals, and several short poles are arranged between the two long poles, with the short poles arranged at intervals along the length direction of the long poles.

[0020] Furthermore, the long rod is provided with a plurality of slide table threaded holes spaced apart along its own length, and a slide table bolt is inserted into the slide table seat, the slide table bolt being threadedly connected to the slide table threaded holes.

[0021] Embodiments of the present invention also provide a production line including the positioning device described above.

[0022] The beneficial effects of this invention are: This invention provides a positioning device that achieves flexible adjustment in both longitudinal and angular dimensions by setting multiple sets of sliding units in a sliding mechanism that slide independently along the length of a base frame, and by setting horizontally rotatable positioning mechanisms at both ends of each sliding unit. The independent sliding of the sliding units can adapt to the wheelbase differences of different vehicle models, allowing the same tooling to cover multiple vehicle body length specifications. The horizontal rotation of the positioning mechanisms can adapt to the different angle requirements of positioning holes for different vehicle models, ensuring that the positioning pins are always accurately inserted into the process holes of the vehicle body. Compared with traditional fixed tooling, this positioning device can complete vehicle model switching without disassembling and replacing the entire set of positioning units, significantly shortening changeover time, reducing production line construction costs, and adapting to the flexible needs of multi-vehicle mixed-flow production.

[0023] This invention provides a production line that inherits all the beneficial effects of the aforementioned positioning device. By applying this positioning device to the production line, the line gains the ability to flexibly switch between multiple vehicle models. The same production line can quickly switch between different vehicle models without stopping to change tooling, significantly shortening changeover time and improving production line utilization and capacity. The multi-degree-of-freedom adjustment capability of the positioning device allows it to cover various vehicle models with different wheelbases, track widths, and positioning hole angles, reducing the types and number of tooling on the production line and lowering tooling investment and warehousing management costs. The modular structure of the positioning device facilitates later modification and expansion of the production line. When a new vehicle model is added to the production plan, there is no need to redesign and manufacture the entire set of tooling; only the parameters of the existing positioning device need to be adjusted. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1This is an overall schematic diagram of the positioning device provided in an embodiment of the present invention; Figure 2 A schematic diagram of the positioning mechanism of the positioning device provided in an embodiment of the present invention; Figure 3 A cross-sectional view of the positioning mechanism of the positioning device provided in an embodiment of the present invention; Figure 4 An exploded view of the positioning mechanism of the positioning device provided in an embodiment of the present invention; Figure 5 An exploded view of the positioning mechanism of the positioning device provided in an embodiment of the present invention from another direction; Figure 6 A schematic diagram of the positioning base of the positioning device provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the positioning base of the positioning device provided in an embodiment of the present invention from another direction; Figure 8 A schematic diagram of the adjusting worm gear of the positioning device provided in an embodiment of the present invention; Figure 9 A schematic diagram of the sliding unit of the positioning device provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of the slide base of the positioning device provided in an embodiment of the present invention.

[0026] icon: 100 - Base frame; 101 - Long pole; 102 - Short pole; 200 - Sliding mechanism; 201 - Slide rod; 202 - Slide base; 203 - Sliding groove; 204 - Slide bolt; 300-Positioning mechanism; 301-Positioning base; 302-Rotating table; 303-Rotating plate; 304-Positioning slide; 305-Positioning pin; 306-Lower slider; 307-Rotating groove; 308-Lower groove; 309-Rotating through groove; 310-Locking screw hole; 311-Locking bolt; 312-Positioning shaft; 313-Adjusting worm gear; 314-Adjusting worm; 315-Positioning mounting groove; 316-Side groove; 317-Side slot; 318-Rotating hole; 319-Rotating block; 320-Side protrusion; 321-Side rotating hole; 322-Base plate; 323-Bearing groove; 324-Base bearing; 325-Brake component; 326-Brake spring; 327-Brake block; 328-Extension ring; 329-Brake groove; 330-Brake sliding frame; 331-Actuating lever. Detailed Implementation

[0027] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0030] Example 1 like Figures 1 to 10 As shown, the present invention provides a positioning device for fixing the car body during automobile manufacturing, including a base frame 100, a sliding mechanism 200 and a positioning mechanism 300. The sliding mechanism 200 includes at least two sets of sliding units. The sliding units are disposed on the base frame 100 and are spaced apart along the length direction of the base frame 100. Each set of sliding units can slide independently along the length direction of the base frame 100. Each sliding unit is provided with a positioning mechanism 300 on the upper surface at both ends along its own length direction. The positioning mechanism 300 can rotate along the plane where the upper surface of the sliding unit is located. The positioning mechanism 300 engages with the vehicle body to secure the vehicle body.

[0031] In this embodiment, the positioning device is used to fix the car body during automobile manufacturing, and includes a base frame 100, a sliding mechanism 200, and a positioning mechanism 300. The base frame 100 serves as the supporting foundation for the entire positioning device, and its length direction is consistent with the length direction of the car body, providing a precise linear guide foundation for the sliding mechanism 200. The sliding mechanism 200 includes at least two sets of sliding units, which are disposed on the base frame 100 and spaced apart along the length direction of the base frame 100. Each set of sliding units can slide independently along the length direction of the base frame 100, meaning that each set of sliding units can move independently relative to the base frame 100 in the length direction, without being restricted by the position of other sliding units. This independent sliding design allows different sliding units to be adjusted to different longitudinal positions according to the wheelbase requirements of the produced car model, thereby adapting to car bodies of different lengths.

[0032] Each sliding unit has a positioning mechanism 300 on its upper surface at both ends along its length. Each sliding unit has one positioning mechanism 300 at each end along its length, and the two positioning mechanisms 300 correspond to the process holes at the bottom of the vehicle body. The positioning mechanism 300 can rotate along the plane of the upper surface of the sliding unit, that is, the positioning mechanism 300 can rotate in the horizontal plane around a vertical axis to adjust its positioning angle to adapt to different orientations of the process holes at the bottom of different vehicle models. The positioning mechanism 300 engages with the vehicle body to fix it in place. Through the longitudinal movement of the sliding unit on the base frame 100 and the rotation of the positioning mechanism 300 in the horizontal plane, the positioning device can adapt to various vehicle models with different wheelbases and different positioning hole angles, enabling rapid production changeover without changing tooling.

[0033] By setting multiple sliding units in the sliding mechanism 200 to slide independently along the length of the base frame 100, and setting horizontally rotatable positioning mechanisms 300 at both ends of each sliding unit, flexible adjustment of the positioning device in both longitudinal and angular dimensions is achieved. The independent sliding of the sliding units can adapt to the wheelbase differences of different vehicle models, allowing the same tooling to cover multiple vehicle body length specifications; the horizontal rotation of the positioning mechanism 300 can adapt to the different angle requirements of the positioning holes of different vehicle models, ensuring that the positioning pin 305 can always be accurately inserted into the process holes of the vehicle body. Compared with traditional fixed tooling, this positioning device can complete vehicle model switching without disassembling and replacing the entire positioning unit, significantly shortening the changeover time, reducing the construction cost of the production line, and adapting to the flexible needs of multi-vehicle mixed-flow production.

[0034] According to one embodiment provided by the present invention, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the positioning mechanism 300 includes a positioning base 301, a rotating table 302, and a positioning assembly; The base is connected to the sliding unit, and the top of the base is provided with a rotating platform 302, which can rotate along the plane of the upper surface of the base. The positioning component is mounted on the rotating table 302 and can slide along the length of the rotating table 302.

[0035] In this embodiment, the positioning base 301 is the basic support component fixedly connected to the sliding unit in the positioning mechanism 300. It has a block-like structure and is fixedly installed on the upper surface of the sliding unit by bolts. A rotating platform 302 is provided on the top of the positioning base 301. The rotating platform 302 is a flat plate component used to support the positioning assembly. The rotating platform 302 can rotate along the plane of the upper surface of the positioning base 301, that is, the rotating platform 302 can rotate relative to the positioning base 301 in the horizontal plane around a vertical axis, thereby adjusting the positioning angle. The positioning assembly is disposed on the rotating platform 302. The positioning assembly can move linearly along the length of the upper surface of the rotating platform 302 to adjust the lateral position of the positioning pin 305 on the rotating platform 302, adapting to the differences in wheelbase of different vehicle models. The combination of the positioning component, the rotating table 302, and the positioning base 301 enables the positioning pin 305 to be adjustable in the horizontal plane. It can accurately adapt to the positioning requirements of various vehicle models by moving longitudinally with the sliding unit, rotating horizontally with the rotating table 302, and sliding along the length of the rotating table 302.

[0036] By configuring the positioning mechanism 300 as a combination of a positioning base 301, a rotating table 302, and a positioning component, the positioning pin 305 achieves independent adjustment in three degrees of freedom within the horizontal plane. The positioning base 301 provides a stable mounting foundation, the rotating table 302 enables precise angle adjustment, and the positioning component enables flexible adjustment of the lateral position. The three components work together to allow the positioning pin 305 to accurately reach any position required for the process hole at the bottom of the vehicle body, significantly improving the flexibility and positioning accuracy of the positioning device.

[0037] According to one embodiment provided by the present invention, such as Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the bottom of the rotating platform 302 is provided with a rotating plate 303, and the positioning base 301 is connected to the rotating plate 303. The positioning base 301 can rotate relative to the rotating plate 303.

[0038] In this embodiment, the rotating plate 303 is a plate-shaped structure provided on the bottom surface of the rotating platform 302. Its shape is rectangular, serving as the rotational interface between the rotating platform 302 and the positioning base 301. The upper end of the positioning base 301 is provided with a mounting surface connected to the rotating plate 303, forming a rotatable fit between the two. The relative rotation of the positioning base 301 and the rotating plate 303 is driven and controlled by a transmission component (e.g., a worm gear mechanism). The output end of the transmission component is connected to the rotating plate 303, precisely controlling the rotation angle of the rotating plate 303, thereby controlling the angle of the rotating platform 302 and the positioning component mounted on it.

[0039] By setting a rotating plate 303 at the bottom of the rotating platform 302 and allowing the positioning base 301 to rotate relative to the rotating plate 303, a precise rotational fit between the rotating platform 302 and the positioning base 301 is achieved. The structure of the rotating plate 303 provides a large rotational contact area, enabling the rotating platform 302 to have sufficient stability and anti-overturning capability when bearing the weight of the vehicle body and the positioning load, and ensuring the accuracy of the positioning angle during long-term use.

[0040] According to one embodiment provided by the present invention, such as Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the positioning assembly includes a positioning slide 304, a positioning pin 305, and a lower slider 306; The top of the rotating table 302 is provided with a rotating slide groove 307, the side of the rotating table 302 opposite to the rotating slide groove 307 is provided with a lower slide groove 308, the bottom of the rotating slide groove 307 is provided with a rotating through groove 309, the positioning slide 304 is slidably connected to the rotating slide groove 307, and the lower slider 306 is slidably connected to the lower slide groove 308. The lower slider 306 is provided with a locking screw hole 310, and the locking bolt 311 passes through the rotating table 302 and the rotating through groove 309 and is threadedly connected to the locking screw hole 310; The positioning pin 305 is located on the top of the positioning slide 304 and is used to engage with the pre-set process holes on the vehicle body.

[0041] In this embodiment, the rotating groove 307 is a groove structure extending along the length of the rotating platform 302, used to accommodate and guide the positioning slide 304. A lower groove 308 is provided on the side of the rotating platform 302 opposite to the rotating groove 307 (i.e., the lower surface of the rotating platform 302). The lower groove 308 extends in the same direction as the rotating groove 307, forming a double-groove structure with corresponding upper and lower grooves. A rotating through groove 309 is provided at the bottom of the rotating groove 307. The rotating through groove 309 is a slot extending through the thickness direction of the rotating platform 302, connecting the rotating groove 307 and the lower groove 308.

[0042] The positioning slide 304 is slidably connected to the rotating slide 307. The positioning slide 304 is a slider-shaped component whose shape matches the cross-sectional shape of the rotating slide 307, and it can slide freely along the length of the rotating slide 307. The lower slider 306 is slidably connected to the lower slide 308. The lower slider 306 and the positioning slide 304 are arranged vertically correspondingly and are connected by a locking bolt 311. The lower slider 306 is provided with a locking screw hole 310, which is a threaded hole that penetrates the thickness direction of the lower slider 306. The locking bolt 311 passes through the through hole and the rotating through groove 309 on the positioning slide 304 and is threadedly connected to the locking screw hole 310 of the lower slider 306. When the locking bolt 311 is tightened, the positioning slide 304 and the lower slider 306 are clamped on the rotating slide 307 and the lower slide 308, fixing the positioning slide 304 in its current position on the rotating table 302. The positioning pin 305 is located on the top of the positioning slide 304. The positioning pin 305 is a cylindrical pin that extends upward from the positioning slide 304 and is used to engage with the pre-set process holes on the vehicle body.

[0043] By setting up a connection structure where the positioning slide 304 and the lower slider 306 are clamped together by locking bolts 311, the overturning moment of the positioning slide 304 under impact or vibration is eliminated, improving the positional accuracy and impact resistance of the positioning pin 305 during use. The corresponding upper and lower slide grooves enable the positioning slide 304 and the lower slider 306 to form a double guide structure, ensuring balanced force during adjustment and avoiding the uneven wear or jamming problems that are prone to occur with a single-sided slide groove, making the position adjustment of the positioning pin 305 smoother and less labor-intensive.

[0044] According to one embodiment provided by the present invention, such as Figure 3 , Figure 4 and Figure 5 As shown, the positioning mechanism 300 also includes a transmission assembly; The transmission component is located inside the positioning base 301 and is also connected to the rotating plate 303. The transmission component can drive the positioning base 301 and the rotating plate 303 to rotate relative to each other.

[0045] In this embodiment, the output end of the transmission component is connected to the rotating plate 303. When the operator or automated equipment drives the input end of the transmission component, the transmission component transmits the input motion and power to the rotating plate 303 after deceleration and reversal, driving the rotating plate 303 to rotate relative to the positioning base 301 around the vertical axis.

[0046] By incorporating a transmission component within the positioning base 301 and connecting it to the rotating plate 303, precise and controllable adjustment of the positioning angle is achieved. The built-in transmission component within the positioning base 301 saves external space, resulting in a compact positioning mechanism 300. The speed reduction and torque amplification effect of the transmission component allows operators to easily and precisely adjust the angle of the rotating plate 303.

[0047] According to one embodiment provided by the present invention, such as Figure 3 , Figure 4 , Figure 5 and Figure 8 As shown, the transmission assembly includes a positioning shaft 312, an adjusting worm gear 313, and an adjusting worm 314; The positioning base 301 has a positioning mounting groove 315 along its own height direction, and the opening of the positioning mounting groove 315 faces the rotating plate 303. The positioning shaft 312 is located in the positioning mounting groove 315, and the top end of the positioning shaft 312 is connected to the rotating plate 303. An adjusting worm gear 313 is sleeved on the outer side of the positioning shaft 312. The positioning shaft 312 and the adjusting worm gear 313 rotate synchronously. The adjusting worm gear is engaged with the adjusting worm 314. The end of the adjusting worm 314 extends outward through the positioning base 301.

[0048] In this embodiment, the positioning base 301 has a positioning mounting groove 315 along its height direction. The positioning mounting groove 315 is a cavity recessed downward from the upper end of the positioning base 301, with its opening facing the rotating plate 303. The positioning shaft 312 is disposed in the positioning mounting groove 315. The positioning shaft 312 is a cylindrical shaft extending vertically, and its top end is fixedly connected to the rotating plate 303, allowing it to rotate synchronously with the rotating plate 303. An adjusting worm gear 313 is sleeved on the outer side of the positioning shaft 312. The adjusting worm gear 313 and the positioning shaft 312 are connected by a key to achieve synchronous rotation. The rotational motion of the adjusting worm gear 313 is transmitted to the positioning shaft 312 through the key connection, causing the positioning shaft 312 and the rotating plate 303 fixedly connected to it to rotate synchronously. The adjusting worm gear 313 is meshed with the adjusting worm 314, which is a horizontally arranged threaded rod with its axis perpendicular to the axis of the positioning shaft 312. The thread of the adjusting worm 314 meshes with the teeth of the adjusting worm gear 313. The end of the adjusting worm 314 extends outward through the positioning base 301. When the adjusting worm 314 is rotated, the helical motion of the worm drives the adjusting worm gear 313 to rotate, which is then transmitted to the rotating plate 303 via the positioning shaft 312, achieving precise adjustment of the angle of the rotating plate 303. The large reduction ratio of the worm gear pair allows for precise control of the angular displacement of the rotating plate 303, and its self-locking characteristic ensures that the adjusted angle is stably maintained.

[0049] By employing a worm gear transmission assembly consisting of a positioning shaft 312, an adjusting worm wheel 313, and an adjusting worm 314, precise and stable adjustment of the positioning angle is achieved. The worm gear transmission has the advantages of a large transmission ratio, compact structure, and smooth transmission, accurately converting the rotational motion of the adjusting worm 314 into the rotational motion of the positioning shaft 312. Its self-locking characteristic allows the positioning shaft 312 to automatically lock after adjustment, resisting working loads and vibrations without the need for additional locking devices, thus ensuring the long-term stability of the positioning angle.

[0050] According to one embodiment provided by the present invention, such as Figure 6 and Figure 7 As shown, the side wall of the positioning base 301 is provided with a side groove 316, the bottom of the side groove 316 is provided with a side slot 317, and a rotating hole 318 is formed in the side slot 317. The end of the adjusting worm 314 extends to the outside of the positioning base 301 through the rotating hole 318. A rotating block 319 is fixed to the end of the adjusting worm gear 314 located outside the positioning base 301.

[0051] In this embodiment, the side wall of the positioning base 301 is provided with a side groove 316, which is a groove-shaped structure recessed inward from the surface of the side wall of the positioning base 301. A side slot 317 is provided at the bottom of the side groove 316, which is a cavity extending further inward from the bottom of the side groove 316, and a rotating hole 318 is formed inside it. The rotating hole 318 is a circular channel extending along the axis of the adjusting worm 314, used to accommodate and support one end of the adjusting worm 314. The end of the adjusting worm 314 extends outward from the positioning base 301 through the rotating hole 318, that is, one end of the adjusting worm 314 protrudes through the rotating hole 318 and is exposed outside the positioning base 301, so that the operator can perform rotation operation. A rotating block 319 is fixedly provided at the end of the adjusting worm 314 located outside the positioning base 301. The rotating block 319 is a polygonal or knurled operating handle, which is convenient for the operator to hold and rotate the adjusting worm 314. By rotating the rotating block 319, the operator can easily drive the adjusting worm 314 to rotate, which in turn drives the positioning shaft 312 and the rotating plate 303 to rotate through the worm gear pair, thereby achieving the adjustment of the positioning angle.

[0052] By creating a side groove 316 and a side slot 317 on the side wall of the positioning base 301, and forming a rotating hole 318 therein to support the adjusting worm gear 314, stable support of the adjusting worm gear 314 inside the positioning base 301 and convenient external operation are achieved. The side groove 316 provides operating space for the operator's fingers or tools, and the design of the rotating block 319 makes the rotation operation more effortless and precise.

[0053] According to one embodiment provided by the present invention, such as Figure 4 and Figure 5 As shown, a side protrusion 320 is fixed in the side groove 316. The side protrusion 320 has a through side rotating hole 321. The side rotating hole 321 communicates with the rotating hole 318. One end of the adjusting worm 314 passes through the rotating hole 318 and meshes with the adjusting worm wheel 313, and the other end is inserted into the side rotating hole 321. The adjusting worm 314 passes through the side rotating hole 321 and has a rotating block 319 at its end located outside the positioning base 301.

[0054] In this embodiment, a side protrusion 320 is fixedly disposed within the side groove 316. The side protrusion 320 is an independently machined block component, which is fixedly installed in the side groove 316 by bolts or press-fitting. The side protrusion 320 has a through side rotating hole 321, which is a circular through hole extending along the axis of the adjusting worm 314. The side rotating hole 321 communicates with the rotating hole 318, and the two together constitute the two-end support structure of the adjusting worm 314. One end of the adjusting worm 314 passes through the rotating hole 318 and engages with the adjusting worm wheel 313, while the other end is inserted into the side rotating hole 321. The side protrusion 320 and the rotating hole 318 of the positioning base 301 respectively support the two ends of the adjusting worm 314, forming a stable two-end support structure. A rotating block 319 is provided at the end of the adjusting worm 314 that passes through the side rotating hole 321 and is located outside the positioning base 301. That is, the rotating block 319 is located at the end of the adjusting worm 314 that protrudes from the side protrusion 320, which facilitates operation by the operator from the side of the positioning base 301. The two-end support structure improves the rotational coaxiality and rigidity of the adjusting worm 314, and avoids bending or swaying of the adjusting worm 314 due to uneven force during the adjustment process.

[0055] By setting the side protrusion 320 and its side rotating hole 321 to form a two-end support structure with the rotating hole 318 of the positioning base 301, the rotational rigidity and transmission smoothness of the adjusting worm 314 are significantly improved. The two-end support prevents the adjusting worm 314 from bending and deforming when subjected to adjusting torque and worm gear meshing reaction force, ensuring the accuracy of worm gear meshing and the reliability of long-term use.

[0056] According to one embodiment provided by the present invention, such as Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a base plate 322 is provided between the positioning base 301 and the rotating plate 303, and the base plate 322 can completely cover the positioning mounting groove 315. The substrate 322 has a bearing groove 323, and a base bearing 324 is provided in the bearing groove 323. A through hole is provided at the bottom of the bearing groove 323, and the end of the positioning shaft 312 passes through the through hole and is connected to the base bearing 324.

[0057] In this embodiment, the substrate 322 is a flat plate component, fixed to the upper surface of the positioning base 301 by bolts, completely sealing the opening of the positioning mounting groove 315 to prevent external contaminants such as welding spatter, metal chips, and dust from entering the positioning mounting groove 315. The substrate 322 has a bearing groove 323, a circular recessed groove extending downwards from the upper surface of the substrate 322, used to accommodate the base bearing 324. The base bearing 324, a rolling bearing, is fixedly installed within the bearing groove 323, its outer ring fixedly fitted to the inner wall of the bearing groove 323. A through hole penetrating the substrate 322 is provided at the bottom of the bearing groove 323; this through hole is a circular channel for the positioning shaft 312 to pass through. The end of the positioning shaft 312 passes through the through hole and is fixedly connected to the inner ring of the base bearing 324, providing rotational support for the positioning shaft 312. Through the base bearing 324 on the base plate 322, the positioning shaft 312 can maintain stable rotational accuracy and axial position when bearing the load of the rotating table 302 and the positioning components and the vehicle body above it.

[0058] By providing a base plate 322 with a bearing groove 323 and a base bearing 324 between the positioning base 301 and the rotating plate 303, the dual functions of sealing and protecting the positioning mounting groove 315 and providing rotational support for the positioning shaft 312 are achieved. The base plate 322 encloses the precision transmission components in its internal space, preventing the intrusion of external contaminants and extending the service life of the worm gear; the base bearing 324 provides high-precision rotational support for the positioning shaft 312, reducing rotational friction and improving the smoothness of angle adjustment and positioning accuracy.

[0059] According to one embodiment provided by the present invention, such as Figure 3 , Figure 4 and Figure 5 As shown, the positioning mechanism 300 also includes a braking assembly; The brake assembly is located in the positioning mounting groove 315 and can move along the height direction of the positioning mounting groove 315 to move closer to or further away from the adjusting worm gear 313. The brake assembly can engage with the adjusting worm gear 313 to limit the rotation of the adjusting worm gear 313.

[0060] In this embodiment, the braking assembly is an auxiliary locking structure independent of the worm gear self-locking mechanism, providing additional mechanical locking on top of the worm gear self-locking. The braking assembly can engage with the adjusting worm gear 313 to limit its rotation. When the braking assembly moves close to the adjusting worm gear 313, its braking structure engages with the braking engagement structure on the adjusting worm gear 313, preventing the rotation of the adjusting worm gear 313 and thus locking the positioning shaft 312. Under normal operating conditions, the braking assembly can be in a released state, with the angle maintained by the worm gear self-locking mechanism. Under conditions with large impact loads, the braking assembly can be actively activated, providing double safety assurance for the positioning angle.

[0061] By incorporating a movable brake assembly within the positioning mounting slot 315 and engaging it with the adjusting worm gear 313, an independent auxiliary locking mechanism is added in addition to the worm gear's self-locking mechanism, creating a double safety guarantee. The brake assembly provides additional mechanical locking under extreme impact conditions, preventing the risk of angle drift that may result from decreased self-locking performance due to long-term wear of the worm gear, thus improving the long-term reliability of maintaining the positioning angle.

[0062] According to one embodiment provided by the present invention, such as Figure 3 , Figure 4 and Figure 5 As shown, the brake assembly includes a brake element 325 and a brake spring 326; Both the brake component 325 and the brake spring 326 are sleeved on the outer wall of the positioning shaft 312. The brake component 325 can slide along the height direction of the positioning shaft 312. One end of the brake spring 326 abuts against the base plate 322, and the other end abuts against the brake component 325. The brake component 325 has a brake block 327 on the side facing the adjusting worm gear 313, and an extension ring 328 on the side facing the brake component 325. The top of the extension ring 328 has a brake groove 329 that matches the brake block 327, and the brake block 327 can be inserted into or removed from the brake groove 329.

[0063] In this embodiment, both the brake component 325 and the brake spring 326 are sleeved on the outer wall of the positioning shaft 312. The brake component 325 is an annular member that can slide up and down along the outer wall of the positioning shaft 312. The brake spring 326 is a helical compression spring, sleeved on the outer wall of the positioning shaft 312. One end of the brake spring 326 abuts against the lower surface of the base plate 322, and the other end abuts against the upper surface of the brake component 325. The brake spring 326 is always in a compressed state, applying a downward elastic force to the brake component 325. A brake block 327 is provided at the end of the brake component 325 facing the adjusting worm gear 313 (i.e., the lower end). The brake block 327 is a block-shaped or pin-shaped structure protruding downward from the lower surface of the brake component 325. An extension ring 328 is provided at the end of the adjusting worm gear 313 facing the brake component 325 (i.e., the upper end). The extension ring 328 is an annular boss extending upward from the upper surface of the adjusting worm gear 313. The top of the extension ring 328 has a brake groove 329 that matches the brake block 327. The brake groove 329 is a recessed opening extending downward from the upper surface of the extension ring 328. Under the elastic force of the brake spring 326, the brake element 325 is pushed downward, causing the brake block 327 to insert into the brake groove 329, locking the rotation of the adjusting worm gear 313. When the angle needs to be adjusted, the operator pushes the brake element 325 upward, causing the brake block 327 to disengage from the brake groove 329 and releasing the lock.

[0064] By employing a normally closed brake structure driven by a brake spring 326, an automatic locking function is achieved without external force. The brake spring 326 continuously drives the brake component 325 to move in the locking direction, keeping the brake block 327 engaged with the brake groove 329 on the adjusting worm gear 313. Under normal operating conditions, the brake mechanism is in a normally closed locked state, and the lock is actively released by manual operation only when the angle needs to be adjusted. This provides stronger torque resistance and the ability to withstand larger circumferential impact loads.

[0065] According to one embodiment provided by the present invention, such as Figure 3 , Figure 4 and Figure 5 As shown, the brake assembly also includes a brake slide bracket 330; The brake sliding bracket 330 is sleeved on the outside of the brake component 325, and the brake sliding bracket 330 can drive the brake component 325 to move synchronously. A lever 331 is provided on the side wall of the brake sliding bracket 330, and an adjustment hole is provided on the side wall of the positioning base 301. The lever 331 extends outward through the adjustment hole and can move along the extension direction of the adjustment hole.

[0066] In this embodiment, the brake sliding bracket 330 is sleeved on the outside of the brake component 325. The brake sliding bracket 330 has a frame-like ring structure, surrounding the brake component 325. The brake sliding bracket 330 can drive the brake component 325 to move synchronously. The inner wall of the brake sliding bracket 330 cooperates with the force-bearing step on the outer wall of the brake component 325. When the brake sliding bracket 330 is pushed upward, its inner wall drives the brake component 325 to move upward against the pressure of the brake spring 326 through the force-bearing step, causing the brake block 327 to exit from the brake groove 329. A toggle rod 331 is provided on the side wall of the brake sliding bracket 330. The toggle rod 331 is a rod-shaped member extending outward from the side wall of the brake sliding bracket 330. An adjustment hole is provided on the side wall of the positioning base 301. The adjustment hole is an elongated hole extending in the vertical direction. The toggle rod 331 extends outward through the adjustment hole to the outside of the positioning base 301. The lever 331 can move along the extension direction of the adjustment hole. The operator can push the brake slide bracket 330 upward to release it from locking by using the lever 331, or release the lever 331 to allow the brake slide bracket 330 to reset under the action of the brake spring 326. The length of the adjustment hole limits the stroke of the lever 331, that is, limits the range of movement of the brake component 325.

[0067] By providing a brake slide bracket 330 with a toggle lever 331 on the outside of the brake component 325, a convenient manual control interface is provided for the operation of the brake assembly. The operator only needs to toggle the toggle lever 331, which extends to the outside of the positioning base 301, to complete the brake release and reset operations without disassembling any parts; the adjustment hole limits the travel of the toggle lever 331 to prevent damage caused by excessive movement of the brake component 325, thereby improving the reliability of operation.

[0068] According to one embodiment of the present invention, a sliding groove is provided on the inner sidewall of the positioning mounting groove 315, and a sliding member is provided on the outer wall of the brake member 325, the sliding member being able to slide and engage with the sliding groove.

[0069] In this embodiment, the slide groove is a guide groove extending along the height direction of the positioning mounting groove 315. A sliding member is provided on the outer wall of the brake component 325. The sliding member is a guide protrusion protruding outward from the outer wall of the brake component 325, and its shape matches the cross-section of the slide groove. The sliding member can slide and engage with the slide groove, that is, the sliding member is embedded in the slide groove and can slide up and down along the extension direction of the slide groove. The engagement between the slide groove and the sliding member provides precise guidance for the up and down movement of the brake component 325, ensuring that the brake component 325 maintains the correct posture when sliding along the positioning shaft 312, so that the brake block 327 can be accurately aligned with the brake groove 329.

[0070] In one embodiment, two circumferentially symmetrical sliding grooves are arranged on the inner wall of the positioning mounting groove 315, and two corresponding sliding members are arranged on the outer wall of the brake component 325, forming a double-guide structure, which further improves the stability and anti-deflection capability of the brake component 325. The length of the sliding groove limits the maximum stroke of the brake component 325, preventing the brake component 325 from dislodging from the positioning shaft 312.

[0071] By creating a groove on the inner wall of the positioning mounting groove 315 and installing a sliding member on the outer wall of the brake component 325, precise guidance and posture maintenance are achieved when the brake component 325 slides along the positioning shaft 312. The cooperation between the groove and the sliding member prevents the brake component 325 from deviating or getting stuck during sliding, ensuring that the brake block 327 can accurately enter and exit the brake groove 329, thereby improving the reliability and repeatability of the braking mechanism.

[0072] According to one embodiment provided by the present invention, such as Figure 1 , Figure 9 and Figure 10 As shown, the sliding unit includes a slide rod 201 and a slide base 202; The slide rod 201 has slide seats 202 at both ends. The slide seats 202 have sliding grooves 203 and are slidably connected to the base frame 100 through the sliding grooves 203.

[0073] In this embodiment, the slide rod 201 is a long, rod-shaped component arranged along the width direction of the base frame 100, with slide seats 202 at both ends. The slide seats 202 are block-shaped components, fixedly connected to both ends of the slide rod 201 by bolts, and a positioning base 301 is fixedly mounted on the top of the slide seats 202. The slide seats 202 have a sliding groove 203, which is a transverse groove penetrating the slide seats 202, and its cavity shape matches the shape of the guide rail on the base frame 100. The slide seats 202 are slidably connected to the base frame 100 through the sliding groove 203, and the long rod 101 on the base frame 100 is embedded in the sliding groove 203, allowing the slide seats 202 to slide freely along the extension direction of the long rod 101.

[0074] By setting the sliding unit as a combination of a sliding rod 201 and two end sliding seats 202, a stable sliding connection between the sliding unit and the base frame 100 is achieved. The sliding groove 203 on the sliding seat 202 and the guide rail of the base frame 100 provide precise linear guidance, and the double sliding seat 202 structure at both ends ensures the parallelism and stability of the sliding unit during the sliding process, preventing skewness and jamming.

[0075] According to one embodiment provided by the present invention, such as Figure 1 and Figure 9 As shown, the base frame 100 includes a long rod 101 and a short rod 102; Two long rods 101 are arranged at intervals, and several short rods 102 are arranged between the two long rods 101. The several short rods 102 are arranged at intervals along the length direction of the long rods 101.

[0076] In this embodiment, two long rods 101 are spaced apart. Each long rod 101 is a linear guide rail extending along the length of the base frame 100, and the two rods are parallel to each other and spaced a predetermined distance apart. Several short rods 102 are provided between the two long rods 101, spaced apart along the length of the long rods 101. The two ends of each short rod 102 are fixedly connected to the inner sidewalls of the two long rods 101 (e.g., by welding or bolting). The short rods 102 are arranged sequentially along the length of the long rods 101, connecting the two long rods 101 into a single unit, forming a stable and rigid rectangular frame structure. The upper or side surface of the long rod 101 serves as the sliding guide surface of the sliding unit, and its surface is precision-machined to ensure sliding accuracy. The long rod 101 serves as a sliding guide rail, providing a precise linear guide surface. The short rod 102 acts as a connecting beam, firmly connecting the two long rods 101 into one unit. This ensures that the frame will not twist or deform when bearing the weight of the vehicle body and positioning loads, guaranteeing the straightness and positional accuracy of the sliding unit as it slides along the long rod 101.

[0077] According to one embodiment provided by the present invention, such as Figure 9 As shown, the long rod 101 has multiple slide table threaded holes spaced apart along its length, and slide table bolts 204 are inserted into the slide table seat 202, which can be threadedly connected to the slide table threaded holes.

[0078] In this embodiment, the threaded holes of the slide table are threaded holes that extend downwards from the upper surface of the long rod 101, and are arranged at equal or unequal intervals along the length of the long rod 101. A slide table bolt 204 is inserted into the slide table seat 202. The slide table bolt 204 is a fastener that passes through a through hole on the slide table seat 202 and is threadedly connected to the threaded holes on the long rod 101. When the sliding unit slides along the long rod 101 to the target position, the slide table bolt 204 is screwed through the through hole on the slide table seat 202 into the corresponding threaded hole and tightened, thereby fixing the slide table seat 202 onto the long rod 101, thus locking the entire sliding unit in the current position. The distribution of multiple threaded holes along the length of the long rod 101 forms multiple discrete locking positions, and the sliding unit can be fixed at any of these locking positions. The spacing between the threaded holes is determined according to the accuracy requirements of the vehicle's wheelbase adjustment and is not specifically limited here.

[0079] By creating multiple threaded holes on the long rod 101 and locking the slide seat 202 to the long rod 101 using slide bolts 204, precise positioning and reliable fixation of the sliding unit on the base frame 100 are achieved. The multiple threaded holes provide multiple discrete locking positions, enabling the sliding unit to move quickly and accurately to the wheelbase position required for different vehicle models. The bolt locking method offers high connection strength and good vibration resistance, allowing it to withstand loads and vibrations during production without displacement.

[0080] Example 2 The present invention provides a production line including the positioning device described above.

[0081] In this embodiment, the production line includes the aforementioned positioning device. The production line can be a welding production line, a final assembly line, or a sub-assembly assembly line in automobile manufacturing. In the production line, the positioning device is fixedly installed on the workstation base to precisely position and fix the vehicle body entering the workstation, ensuring that welding robots or assembly operators can accurately complete welding, assembly, and other processes. The base frame 100 of the positioning device is fixed to the production line base by anchor bolts or pressure plates. The sliding unit slides along the base frame 100 to the corresponding longitudinal position and locks it according to the wheelbase requirements of the vehicle model currently entering the workstation. The rotating table 302 of the positioning mechanism 300 rotates to the corresponding angle according to the positioning hole angle requirements of the vehicle model. The positioning slide 304 slides along the rotating table 302 to the corresponding wheelbase position, and the positioning pin 305 is precisely inserted into the process hole at the bottom of the vehicle body to complete the precise positioning of the vehicle body. When the production line switches to produce different vehicle models, only the position of the sliding unit, the angle of the rotating table 302, and the position of the positioning slide 304 need to be adjusted according to the positioning parameters of the new vehicle model; no tooling components need to be replaced. The production line can integrate multiple of these positioning devices, which are respectively arranged at the front and rear ends and left and right sides of the vehicle body to form a complete vehicle positioning system.

[0082] By applying the aforementioned positioning device to the production line, the line gains the ability to flexibly switch between multiple vehicle models. The same production line can quickly switch between different models without stopping to change tooling, significantly shortening changeover time and improving production line utilization and capacity. The positioning device's multi-degree-of-freedom adjustment capability allows it to cover various vehicle models with different wheelbases, track widths, and positioning hole angles, reducing the types and number of tooling on the production line and lowering tooling investment and warehousing management costs. The modular structure of the positioning device facilitates later modifications and expansions of the production line. When a new model is added to the production plan, there is no need to redesign and manufacture the entire set of tooling; only the parameters of the existing positioning device need to be adjusted.

[0083] The above are merely preferred embodiments of the present invention and are 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 positioning device for fixing the car body during automobile manufacturing, characterized in that, Includes a base frame, a sliding mechanism, and a positioning mechanism; The sliding mechanism includes at least two sets of sliding units, which are disposed on the base frame and spaced apart along the length of the base frame. Each set of sliding units can slide independently along the length of the base frame. Each of the sliding units is provided with a positioning mechanism on the upper surface at both ends along its own length direction, and the positioning mechanism is capable of rotating along the plane where the upper surface of the sliding unit is located; The positioning mechanism engages with the vehicle body to secure the vehicle body.

2. The positioning device according to claim 1, characterized in that, The positioning mechanism includes a positioning base, a rotating platform, and a positioning component; The base is connected to the sliding unit, and the top of the base is provided with the rotating platform, which can rotate along the plane of the upper surface of the base. The positioning component is disposed on the rotating platform, and the positioning component can slide along the length direction of the rotating platform.

3. The positioning device according to claim 2, characterized in that, The bottom of the rotating platform is provided with a rotating plate, and the positioning base is connected to the rotating plate. The positioning base can rotate relative to the rotating plate.

4. The positioning device according to claim 2, characterized in that, The positioning component includes a positioning slide, a positioning pin, and a lower slider; The top of the rotating platform is provided with a rotating slide groove, the side of the rotating platform opposite to the rotating slide groove is provided with a lower slide groove, the bottom of the rotating slide groove is provided with a rotating through groove, the positioning slide is slidably connected to the rotating slide groove, and the lower slider is slidably connected to the lower slide groove. The lower slider is provided with a locking screw hole, and the locking bolt passes through the rotating table and the rotating through groove, and is threadedly connected to the locking screw hole; The positioning pin is located on the top of the positioning slide, and the positioning pin is used to engage with the pre-set process hole in the vehicle body.

5. The positioning device according to claim 3, characterized in that, The positioning mechanism also includes a transmission assembly; The transmission component is located inside the positioning base and is also connected to the rotating plate. The transmission component can drive the positioning base and the rotating plate to rotate relative to each other.

6. The positioning device according to claim 5, characterized in that, The transmission assembly includes a positioning shaft, an adjusting worm gear, and an adjusting worm. The positioning base has a positioning mounting groove along its own height direction, and the opening of the positioning mounting groove faces the rotating plate. The positioning shaft is located in the positioning mounting groove, and the top end of the positioning shaft is connected to the rotating plate. The adjusting worm gear is sleeved on the outer side of the positioning shaft. The positioning shaft and the adjusting worm gear rotate synchronously. The adjusting worm gear is engaged with the adjusting worm. The end of the adjusting worm extends outward through the positioning base.

7. The positioning device according to claim 6, characterized in that, The positioning base has a side groove on its side wall, and a side slot is formed at the bottom of the side groove. A rotating hole is formed in the side slot, and the end of the adjusting worm extends outward from the positioning base through the rotating hole. A rotating block is fixed to the end of the adjusting worm gear located outside the positioning base.

8. The positioning device according to claim 7, characterized in that, A side protrusion is fixed in the side groove, and the side protrusion has a through side rotating hole. The side rotating hole communicates with the rotating hole. One end of the adjusting worm passes through the rotating hole and meshes with the adjusting worm wheel, and the other end is inserted into the side rotating hole. The adjusting worm gear passes through the side rotating hole and has a rotating block at its end located outside the positioning base.

9. The positioning device according to claim 6, characterized in that, A base plate is provided between the positioning base and the rotating plate, and the base plate can completely cover the positioning mounting groove. The substrate has a bearing groove, a base bearing is provided in the bearing groove, and a through hole is provided at the bottom of the bearing groove. The end of the positioning shaft passes through the through hole and is connected to the base bearing.

10. The positioning device according to claim 9, characterized in that, The positioning mechanism also includes a braking assembly; The brake assembly is located in the positioning mounting groove and can move along the height direction of the positioning mounting groove to move closer to or further away from the adjusting worm gear. The brake assembly can engage with the adjusting worm gear to limit the rotation of the adjusting worm gear.

11. The positioning device according to claim 10, characterized in that, The brake assembly includes a brake element and a brake spring; Both the brake component and the brake spring are sleeved on the outer wall of the positioning shaft. The brake component can slide along the height direction of the positioning shaft. One end of the brake spring abuts against the base plate, and the other end abuts against the brake component. The brake component has a brake block on the side facing the adjusting worm gear, and the adjusting worm gear has an extension ring on the side facing the brake component. The top of the extension ring has a brake groove that matches the brake block, and the brake block can be inserted into or removed from the brake groove.

12. The positioning device according to claim 11, characterized in that, The brake assembly also includes a brake slide frame; The brake sliding bracket is sleeved on the outside of the brake component, and the brake sliding bracket can drive the brake component to move synchronously; The brake sliding frame has a lever on its side wall, and the positioning base has an adjustment hole on its side wall. The lever extends outward through the adjustment hole and can move along the extension direction of the adjustment hole.

13. The positioning device according to claim 11, characterized in that, The inner wall of the positioning and mounting groove is provided with a sliding groove, and the outer wall of the brake component is provided with a sliding component, which can slide and cooperate with the sliding groove.

14. The positioning device according to any one of claims 1-13, characterized in that, The sliding unit includes a slide rod and a slide base; The slide rod has slide seats at both ends, and each slide seat has a sliding groove. The slide seat is slidably connected to the base frame through the sliding groove.

15. The positioning device according to claim 14, characterized in that, The base frame includes long rods and short rods; Two long poles are arranged at intervals, and several short poles are arranged between the two long poles, with the short poles arranged at intervals along the length direction of the long poles.

16. The positioning device according to claim 15, characterized in that, The long rod has multiple slide table threaded holes spaced apart along its length. A slide table bolt is inserted into the slide table seat, and the slide table bolt can be threadedly connected to the slide table threaded holes.

17. A production line, characterized in that, Includes the positioning device as described in any one of claims 1-16.

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