Automobile wheel hub machining deviation-preventing turnover device

Abstract

The application discloses a kind of automobile wheel hub processing deviation prevention overturning device, including base, clamping mechanism, height adjusting mechanism and rotary drive mechanism.Base is fixed to machine tool workbench and carries wheel hub.Clamping mechanism includes two support frames that are oppositely arranged left and right, two clamping plate assemblies and opening and closing drive assembly, clamping plate assembly is slidably arranged on the same side support frame, opening and closing drive assembly drives two support frames to approach each other or away to realize clamping.Height adjusting mechanism is connected between support frame and clamping plate assembly, for driving two clamping plate assemblies to rise or fall synchronously after clamping.Rotary drive mechanism is connected between support frame and clamping plate assembly, for driving clamping plate assembly to rotate 180 ° in the process of descending after clamping plate assembly rises to the highest point.The application completes lifting and rotating in constant clamping state, avoids eccentric accumulation in wheel hub overturning process, and improves finished product processing quality.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing equipment, and specifically to an anti-tilting device for automotive wheel hub processing. Background Technology

[0002] During the manufacturing process of automobile wheels, including casting, machining, painting, and dynamic balancing, it is often necessary to process or inspect both the front and back sides of the wheel hub. Therefore, a special flipping device is required to flip the wheel hub 180°.

[0003] Existing wheel hub tilting devices mainly suffer from the following problems: I. Defects of Traditional V-Block Supported Tilting Devices Another common type of wheel-turning device uses V-blocks to support the wheel rim, with the V-blocks rotating manually or by power. The drawback of this type of device is that the wheel hub rests on the V-blocks solely by gravity, lacking active radial constraint. During the turning process, as the tilt angle changes, the wheel hub is prone to sliding along the inclined surface of the V-blocks, leading to inaccurate turning angles. Furthermore, the position of the wheel hub after turning is random, making it impossible to guarantee repeatability and positioning accuracy.

[0004] II. Inherent drawbacks of the existing "clamp-release-re-clamp" mode Whether using a gripper-type or V-block-type device, most existing devices follow an operating procedure of "clamping first, then flipping, releasing after flipping to the correct position, repositioning, and then clamping again." This method introduces new positioning errors each time the device is re-clamped, and the cumulative effect of these errors makes it difficult for the wheel hub to maintain a uniform reference surface during multi-process machining, severely restricting the improvement of machining accuracy. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the technical problem to be solved by the present invention is to provide an anti-deviation and overturning device for automobile wheel hub processing, which can achieve deflection-free lifting and precise overturning while maintaining a constant clamping state of the wheel hub, and can ensure that the axis position of the wheel hub remains unchanged during the overturning process to avoid the accumulation of eccentricity.

[0006] To achieve the above objectives, the present invention provides a device for preventing tilting and overturning during automotive wheel hub processing, comprising: The base is used to fix the machine tool on the worktable and to support the car wheel hub to be processed. The clamping mechanism includes two support frames, two clamping plate assemblies, and an opening and closing drive assembly. The two support frames are arranged opposite each other on the base. The two clamping plate assemblies are arranged opposite each other to clamp the car wheel hub from the left and right sides. The two clamping plate assemblies are respectively slidably arranged on the support frames on the same side. The opening and closing drive assembly is connected to the two support frames and is used to drive the two support frames to move closer to each other or further apart. A height adjustment mechanism is connected between the support frame and the clamping plate assembly, and is used to drive the two clamping plate assemblies to rise or fall synchronously after the clamping mechanism clamps the car wheel hub; A rotary drive mechanism, connected between the support frame and the clamping plate assembly, is used to drive the clamping plate assembly to rotate up to 180° during the descent process after the clamping plate assembly has risen to its highest point.

[0007] Furthermore, the opening and closing drive assembly includes a bidirectional screw and an operating handle. The bidirectional screw extends along the lateral direction of the base, and its two ends are respectively provided with external threads in opposite directions. The two ends of the bidirectional screw are respectively connected to the two support frames through the threads. The operating handle is located at one end of the bidirectional screw and is used to drive the bidirectional screw to rotate, thereby causing the two support frames to move closer to each other or further apart.

[0008] Furthermore, it also includes an anti-reverse mechanism connected between the bidirectional screw and the base, which prevents the bidirectional screw from rotating in the direction that drives the two support frames away from each other.

[0009] Furthermore, the anti-reverse mechanism includes a ratchet, a pawl, and an elastic clamping member. The ratchet is sleeved and fixed on the bidirectional screw. One end of the pawl is hinged to the base. One end of the elastic clamping member is connected to the base. The other end of the elastic clamping member is pressed against the outside of the pawl, so that the free end of the pawl is inserted between the ratchet teeth of the ratchet.

[0010] Furthermore, the clamping plate assembly includes an arc-shaped clamping plate and a connecting arm. The first end of the connecting arm is slidably connected to the support frame in the vertical direction, and the arc-shaped clamping plate is fixedly disposed at the second end of the connecting arm. The height adjustment mechanism includes an iron block, an electromagnet, and an on / off control mechanism. The iron block is fixedly disposed at the top of the support frame, and the connecting arm has an internal mounting cavity. The electromagnet and the on / off control mechanism are both disposed within the mounting cavity. The electromagnet generates a magnetic field when energized, and the electromagnetic attraction between the electromagnet and the iron block is greater than the total weight of the two clamping plate assemblies and the car wheel hub; the on / off control mechanism is used to energize the electromagnet when the arc-shaped clamping plate is pressed against the side wall of the car wheel hub.

[0011] Furthermore, an anti-slip pad is provided on the inner side of the arc-shaped clamp.

[0012] Furthermore, the on / off control mechanism includes a first elastic support and a trigger rod; the mounting cavity extends radially along the arc-shaped clamp, the trigger rod is slidably inserted into the mounting cavity, and the first end of the trigger rod passes through the arc-shaped clamp and extends outward; the first elastic support is connected between the trigger rod and the inner wall of the mounting cavity, and is used to provide an outward elastic biasing force to the trigger rod; the control end of the electromagnet is a pressure switch, and the second end of the trigger rod is spaced apart from the pressure switch; when the arc-shaped clamp is pressed against the side wall of the car wheel hub, the car wheel hub pushes the first end of the trigger rod, causing the trigger rod to slide inward along the mounting cavity until the second end of the trigger rod abuts against the pressure switch, thereby energizing the electromagnet.

[0013] Furthermore, the support frame has a vertically oriented groove, and a slider is slidably disposed within the groove. The connecting arm is cylindrical and rotatably inserted into the slider. The rotary drive mechanism includes a one-way rack and a gear. The gear is sleeved and fixed on the connecting arm, and the one-way rack is fixed vertically on the support frame. During the upward movement of the connecting arm, the teeth of the gear can slide against the teeth of the one-way rack. During the downward movement of the connecting arm, the one-way rack and the gear mesh with each other. Under the action of the one-way rack, the connecting arm rotates 180°.

[0014] Furthermore, the length of the movement path of the two clamping plate assemblies driven by the height adjustment mechanism to rise or fall is equal to the stroke required for the gear to move along the one-way rack from the starting point of engagement to the ending point of engagement, which corresponds to a 180° rotation of the connecting arm.

[0015] Furthermore, the lower surface of the base is provided with a positioning keyway and bolt mounting holes for precisely aligning and fixing the base onto the worktable of the machine tool.

[0016] The beneficial effects of this invention are: The aforementioned anti-rollover device for automobile wheel hub processing has at least the following advantages: 1. The present invention integrates the clamping mechanism, the height adjustment mechanism and the rotation drive mechanism in terms of function, and sets the action sequence -- that is, after the clamping mechanism clamps the wheel hub from the left and right sides, the height adjustment mechanism drives the clamping plate assembly to rise or fall synchronously, and then the rotation drive mechanism drives the clamping plate assembly to rotate 180° during the descent.

[0017] This method ensures that the wheel hub is held by the clamping plate assembly throughout the entire process from clamping to flipping, never letting go. Therefore, it avoids the accumulation of positioning errors inevitably introduced by the "loosening and then re-clamping" method in existing technologies. Simultaneously, because the clamping plate assembly is symmetrically arranged and operates synchronously, the geometric axis of the wheel hub remains constant throughout the entire lifting and rotation process, preventing radial eccentricity or axial movement. After flipping, the wheel hub's axis position is completely consistent with its pre-flipping position, with only the upper and lower surfaces swapped, thus providing a precise and stable reference for subsequent processing.

[0018] 2. Because this device maintains a stable clamp on the wheel hub throughout the flipping process, and the wheel hub position is accurately reproduced after each flip, operators do not need to re-set the tool or correct the positioning after each flip. This significantly reduces auxiliary time and increases production cycle time. At the same time, by avoiding damage to the wheel hub surface caused by repeated clamping, the yield rate is effectively improved, and production costs are reduced. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is a schematic diagram of an anti-tilting and overturning device for automobile wheel hub processing according to an embodiment of the present invention; Figure 2 for Figure 1 The diagram shows an anti-tilting and overturning device for automobile wheel hub processing from another angle. Figure 3 for Figure 1 A partial schematic diagram at point A in the middle; Figure 4 for Figure 1 A partial schematic diagram at point B in the middle; Figure 5 for Figure 1 The image shows a longitudinal sectional view of the height adjustment mechanism in the anti-tilt / rollover device for automobile wheel hub processing. Figure 6 for Figure 1 The image shows a cross-sectional view of the height adjustment mechanism in the anti-tilt / rollover device for automobile wheel hub processing. Figure 7 for Figure 1The diagram shows the meshing of a one-way rack and gear in the anti-rollover device for automobile wheel hub processing. Figure label: 100. Base; 200. Clamping mechanism; 210. Support frame; 220. Clamping plate assembly; 221. Arc-shaped clamping plate; 222. Connecting arm; 230. Opening and closing drive assembly; 231. Bidirectional screw; 232. Operating handle; 240. Anti-reverse mechanism; 241. Ratchet; 242. Pawl; 243. Elastic clamping element; 300. Height adjustment mechanism; 310. Iron block; 320. Electromagnet; 330. On / off control mechanism; 331. First elastic support element; 332. Trigger rod; 340. Slider; 400. Rotation drive mechanism; 410. One-way rack; 420. Gear. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention; therefore, the invention is not limited to the specific embodiments disclosed below.

[0022] Please see Figures 1 to 7 The present invention provides an anti-tilting device for automobile wheel hub processing, including a base 100, a clamping mechanism 200, a height adjustment mechanism 300 and a rotation drive mechanism 400.

[0023] Specifically, the base 100 is cast from high-strength cast iron, and its lower surface is a precision-machined flat surface. In use, the base 100 is securely fixed to the worktable of the machine tool by bolts or a pressure plate assembly. The upper surface of the base 100 is provided with a laterally extending guide rail for supporting the automotive wheel hub to be processed and for guiding the movement of subsequent parts.

[0024] The clamping mechanism 200 comprises two support frames 210, two clamping plate assemblies 220, and an opening / closing drive assembly 230. The two support frames 210 are mounted side-by-side on a guide rail on the upper surface of the base 100, and can slide laterally along the guide rail. The two clamping plate assemblies 220 are arranged side-by-side, and their inner contours match the shape of the outer wall (typically the rim) of the vehicle wheel hub. Each clamping plate assembly 220 is mounted on the support frame 210 on the same side and can slide up and down along the height of the support frame 210. The opening / closing drive assembly 230 is drively connected to the two support frames 210, and is used to drive the two support frames 210 to move closer together (thus clamping the wheel hub) or further apart (thus releasing the wheel hub).

[0025] The height adjustment mechanism 300 is connected between the support frame 210 and the clamping plate assembly 220. After the clamping mechanism 200 has gripped the car wheel hub from both sides, the height adjustment mechanism 300 is activated, driving the two clamping plate assemblies 220 to rise or fall synchronously on the support frame 210. This synchronous rising or falling motion ensures that the wheel hub's position in the height direction is adjustable, allowing the wheel hub to be raised from its working height to a suitable height for flipping.

[0026] The rotary drive mechanism 400 is connected between the support frame 210 and the clamping plate assembly 220. Its operating timing is set as follows: during the process of the clamping plate assembly 220 being raised to its highest point by the height adjustment mechanism 300, the clamping plate assembly 220 is not driven to rotate; however, during the descent of the clamping plate assembly 220, the clamping plate assembly 220 is driven to rotate on its own until it rotates 180°. At this time, since the clamping plate assembly 220 still grips the wheel hub, the wheel hub rotates together with the clamping plate assembly 220, achieving the swapping of the upper and lower surfaces.

[0027] By structurally separating the clamping, lifting, and rotating functional modules and linking them in sequence, the wheel hub can be flipped under a constant clamping state. Compared with the existing flipping method that requires loosening and then clamping, this solution fundamentally avoids the accumulation of eccentricity caused by repeated clamping and significantly improves the coaxiality between the wheel hub and the machine tool spindle after flipping.

[0028] Please see Figure 1 , Figure 2 and Figure 3 In this embodiment, the opening / closing drive assembly 230 includes a bidirectional screw 231 and an operating handle 232. The bidirectional screw 231 extends horizontally along the transverse direction of the base 100 (i.e., the direction of relative movement of the two support frames 210). Both ends of the bidirectional screw 231 are machined with external threads of opposite directions; that is, the left end is a left-hand thread and the right end is a right-hand thread, or vice versa. Both ends of the bidirectional screw 231 are connected to the bottom of the two support frames 210 via threaded engagement. The operating handle 232 is fixedly mounted on one end of the bidirectional screw 231.

[0029] In use, the operator manually rotates the operating handle 232 clockwise, causing the bidirectional screw 231 to rotate. Because the threads at both ends of the bidirectional screw 231 turn in opposite directions, and the two support frames 210 are restricted by the guide rails on the base 100 and cannot rotate with the screw, the two support frames 210 will move closer together along the guide rails. At this time, the clamping plate assembly 220 mounted on the support frames 210 also moves closer together until it clamps the hub. Conversely, rotating the operating handle 232 counterclockwise will cause the two support frames 210 to move away from each other, thus releasing the hub.

[0030] Please continue reading Figure 1 , Figure 2 and Figure 3In a preferred embodiment, the device further includes an anti-reverse mechanism 240, which is connected between the bidirectional screw 231 and the base 100 to prevent the bidirectional screw 231 from rotating in a direction that drives the two support frames 210 away from each other. In other words, once the clamping plate assembly 220 has clamped the wheel hub, the anti-reverse mechanism 240 can prevent the bidirectional screw 231 from reversing due to vibration or misoperation, thereby avoiding accidental loosening of the clamping plate assembly 220 and eliminating the risk of the wheel hub falling.

[0031] Specifically, the anti-reverse mechanism 240 includes a ratchet 241, a pawl 242, and an elastic clamping member 243. The ratchet 241 is sleeved and fixedly mounted on the smooth section of the double-acting screw 231, and does not rotate relative to the double-acting screw 231. One end of the pawl 242 is hinged to the base 100 by a pin, and the other end is a free end. One end of the elastic clamping member 243 (specifically, a helical compression spring or a torsion spring) is fixed to the base 100, and the other end is pressed against the back side (i.e., the outer side) of the pawl 242 with a certain preload.

[0032] Working principle: When the bidirectional screw 231 rotates in the "clamping" direction (i.e., the direction in which the drive support frame 210 moves closer), the ratchet bevel on the ratchet 241 pushes the pawl 242 to overcome the pressure of the elastic clamping member 243 and lift it slightly, at which point the ratchet 241 can rotate smoothly. When the bidirectional screw 231 tends to rotate in the "relaxing" direction (i.e., the direction in which the drive support frame 210 moves away), the free end of the pawl 242 will be firmly inserted into the ratchet groove of the ratchet 241 under the action of the elastic clamping member 243. Since the pawl 242 is hinged to the base 100 and cannot retract, the ratchet 241 is jammed, thereby preventing the bidirectional screw 231 from continuing to rotate in the relaxation direction.

[0033] Please see Figure 1 , Figure 2 , Figure 5 and Figure 6 In this application, the clamping plate assembly 220 includes an arc-shaped clamping plate 221 and a connecting arm 222. The first end (inner end) of the connecting arm 222 is slidably connected to the support frame 210 via a vertical slide rail or slide groove, allowing the connecting arm 222 to drive the arc-shaped clamping plate 221 to move up and down. The arc-shaped clamping plate 221 is fixedly installed on the second end (outer end) of the connecting arm 222 by bolts or welding. The concave surface of the arc-shaped clamping plate 221 faces the wheel hub to be processed, and its curvature matches the outer circumference of a common wheel hub.

[0034] The height adjustment mechanism 300 employs the principle of electromagnetic attraction and includes an iron block 310, an electromagnet 320, and an on / off control mechanism 330. The iron block 310 is fixedly mounted on the top of the support frame 210. The connecting arm 222 has an internal mounting cavity, within which both the electromagnet 320 and the on / off control mechanism 330 are housed. The position of the electromagnet 320 corresponds vertically to the iron block 310 at the top of the support frame 210. When energized, the electromagnet 320 generates a magnetic field, resulting in a strong magnetic attraction between it and the iron block 310.

[0035] The instruction manual requires that the electromagnetic attraction between the electromagnet 320 and the iron block 310 be rigorously calculated and designed to ensure that the attraction is greater than the total weight of the two clamping plate assemblies 220 plus the clamped car wheel hub. In other words, once the electromagnet 320 is energized, the attraction is sufficient to lift the clamping plate assembly 220 along with the wheel hub upwards.

[0036] The on / off control mechanism 330 is used to automatically connect the power supply of the electromagnet 320 at the moment when the arc-shaped clamp 221 has pressed against the side wall of the wheel hub, so that the electromagnet 320 is in the energized state.

[0037] The working process is as follows: When the opening and closing drive assembly 230 drives the two support frames 210 to move closer, the arc-shaped clamp 221 gradually approaches the wheel hub. Once the arc-shaped clamp 221 tightly presses against the side wall of the wheel hub, the on / off control mechanism 330 is triggered, and the electromagnet 320 is immediately energized. The electromagnet 320 generates a strong attraction with the iron block 310, driving the connecting arm 222 to carry the arc-shaped clamp 221 and the wheel hub to slide upward against gravity, thereby realizing the lifting of the wheel hub.

[0038] In practice, to prevent relative slippage between the wheel hub and the arc-shaped clamping plate 221 during clamping and flipping, an anti-slip pad can be provided on the inner side of the arc-shaped clamping plate 221 (i.e. the side that directly contacts the wheel hub) to increase gripping force.

[0039] Please see Figure 5 and Figure 6Specifically, the on / off control mechanism 330 includes a first elastic support 331 and a trigger rod 332. The mounting cavity is designed to extend radially along the arc-shaped clamp 221. The trigger rod 332 is slidably inserted into the mounting cavity, with its first end (outer end) passing through the inner side of the arc-shaped clamp 221 and extending outward by a certain length. The first elastic support 331 (specifically a small compression spring) is fitted onto the trigger rod 332, with one end abutting against the shoulder of the trigger rod 332 and the other end abutting against the inner wall of the mounting cavity. The spring is always in a pre-compressed state, thereby providing the trigger rod 332 with an elastic biasing force extending outward from the arc-shaped clamp 221 (i.e., towards the hub). The control end of the electromagnet 320 is a pressure switch, which is installed at the bottom of the mounting cavity. In the initial state, a certain distance is maintained between the second end (inner end) of the trigger rod 332 and the pressure switch.

[0040] When the opening / closing drive assembly 230 drives the arc-shaped clamp 221 to move towards the hub sidewall, the first end of the outward-extending trigger rod 332 first contacts the hub. As the arc-shaped clamp 221 continues to move closer, the hub sidewall pushes the trigger rod 332 inward, forcing it to overcome the elastic force of the first elastic support 331 and slide inward along the mounting cavity (i.e., away from the hub). When the inner side of the arc-shaped clamp 221 is fully pressed against the hub sidewall, the second end of the trigger rod 332 has just moved inward a sufficient distance, thus firmly pressing against the pressure switch. The pressure switch is triggered, and the circuit of the electromagnet 320 is connected.

[0041] Reverse process: When processing is completed, the opening and closing drive assembly 230 drives the arc-shaped clamping plate 221 to release, and the pressure of the wheel hub on the trigger rod 332 disappears. The elastic force of the first elastic support 331 pushes the trigger rod 332 to slide outward and reset. The second end of the trigger rod 332 leaves the pressure switch, the circuit is broken, the electromagnet 320 loses its magnetism, and the clamping plate assembly 220 automatically descends and resets under the action of gravity.

[0042] Please see Figure 1 , Figure 2 and Figure 7 In this application, a vertical groove is provided on the support frame 210, and a slider 340 is slidably disposed in the groove. The connecting arm 222 is cylindrical and rotatably inserted into the slider 340. The rotary drive mechanism 400 includes a one-way rack 410 and a gear 420. The gear 420 is sleeved and fixed on the connecting arm 222, and the one-way rack 410 is fixed on the support frame 210 in the vertical direction. During the upward movement of the connecting arm 222, the teeth of the gear 420 can slide against the teeth of the one-way rack 410. During the downward movement of the connecting arm 222, the one-way rack 410 and the gear 420 mesh with each other. Under the action of the one-way rack 410, the connecting arm rotates 180°, realizing the flipping.

[0043] It should be noted that this embodiment defines the parameter relationship between the height adjustment mechanism 300 and the rotation drive mechanism 400, which is the key to achieving "anti-deviation" flipping.

[0044] The height adjustment mechanism 300 drives the two clamping plate assemblies 220 to rise (or fall) for a distance that is not arbitrary. This length is precisely designed to be equal to the travel distance required for the gear 420 to move along the one-way rack 410 from the starting point of engagement to the ending point of engagement, and the corresponding rotation angle of the gear 420 is exactly 180°.

[0045] In other words, the mechanical dimensional parameters of the device (such as the length of the unidirectional rack 410 and the pitch circle diameter of the gear 420) need to satisfy the following formula: L = π × RL = π × R Where L is the lifting stroke and R is the pitch circle radius of gear 420. When the lifting stroke reaches L, gear 420 has rotated exactly half a revolution.

[0046] By precisely matching the lifting stroke and rotation angle, the position of the wheel hub's axis in space is ensured to be completely consistent with its position before the rotation, with only the upper and lower surfaces being swapped. This design eliminates positional deviations caused by insufficient or excessive rotation angles, ensuring positioning accuracy for subsequent processing (such as drilling or turning the other side).

[0047] To ensure precise alignment of the entire anti-tilt / rollover device with the machine tool, a locating keyway and bolt mounting holes are provided on the lower surface of the base 100 (i.e., the mounting surface in contact with the machine tool table). The locating keyway is a groove extending longitudinally or laterally, used to engage with the locating key on the machine tool table to achieve quick and precise alignment of the device. The bolt mounting holes are through holes or threaded holes for inserting T-bolts or clamping bolts to securely lock the base 100 onto the machine tool table.

[0048] The keyway and bolt mounting holes allow this flipping device to be used as a standardized accessory for machine tools, enabling quick installation and high-precision repeatability. Each time the device is installed on the machine tool, there is no need to recalibrate the center position, significantly improving production preparation efficiency and ensuring long-term repeatability.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A device for preventing tilting and overturning during automobile wheel hub processing, characterized in that, include: The base is used to fix the machine tool on the worktable and to support the car wheel hub to be processed. The clamping mechanism includes two support frames, two clamping plate assemblies, and an opening and closing drive assembly. The two support frames are arranged opposite each other on the base. The two clamping plate assemblies are arranged opposite each other to clamp the car wheel hub from the left and right sides. The two clamping plate assemblies are respectively slidably arranged on the support frames on the same side. The opening and closing drive assembly is connected to the two support frames and is used to drive the two support frames to move closer to each other or further apart. A height adjustment mechanism is connected between the support frame and the clamping plate assembly, and is used to drive the two clamping plate assemblies to rise or fall synchronously after the clamping mechanism clamps the car wheel hub; A rotary drive mechanism, connected between the support frame and the clamping plate assembly, is used to drive the clamping plate assembly to rotate up to 180° during the descent process after the clamping plate assembly has risen to its highest point.

2. The anti-tilting device for automobile wheel hub processing according to claim 1, characterized in that, The opening and closing drive assembly includes a bidirectional screw and an operating handle. The bidirectional screw extends along the lateral direction of the base, and its two ends are respectively provided with external threads in opposite directions. The two ends of the bidirectional screw are respectively connected to the two support frames through the threads. The operating handle is located at one end of the bidirectional screw and is used to drive the bidirectional screw to rotate, thereby causing the two support frames to move closer to each other or further apart.

3. The anti-tilting device for automobile wheel hub processing according to claim 2, characterized in that, It also includes an anti-reverse mechanism, which is connected between the bidirectional screw and the base to prevent the bidirectional screw from rotating in the direction that drives the two support frames away from each other.

4. The anti-tilting device for automobile wheel hub processing according to claim 3, characterized in that, The anti-reverse mechanism includes a ratchet, a pawl, and an elastic clamping member. The ratchet is sleeved and fixed on the bidirectional screw. One end of the pawl is hinged to the base. One end of the elastic clamping member is connected to the base. The other end of the elastic clamping member is pressed against the outside of the pawl, so that the free end of the pawl is inserted between the ratchet teeth of the ratchet.

5. The anti-tilting device for automobile wheel hub processing according to claim 1, characterized in that, The clamping plate assembly includes an arc-shaped clamping plate and a connecting arm. The first end of the connecting arm is slidably connected to the support frame in the vertical direction, and the arc-shaped clamping plate is fixedly disposed at the second end of the connecting arm. The height adjustment mechanism includes an iron block, an electromagnet, and an on / off control mechanism. The iron block is fixedly disposed at the top of the support frame, and the connecting arm has an internal mounting cavity. The electromagnet and the on / off control mechanism are both disposed within the mounting cavity. The electromagnet generates a magnetic field when energized, and the electromagnetic attraction between the electromagnet and the iron block is greater than the total weight of the two clamping plate assemblies and the car wheel hub; the on / off control mechanism is used to energize the electromagnet when the arc-shaped clamping plate is pressed against the side wall of the car wheel hub.

6. The anti-tilting device for automobile wheel hub processing according to claim 5, characterized in that, The inner side of the arc-shaped clamp is provided with an anti-slip pad.

7. The anti-tilting device for automobile wheel hub processing according to claim 5, characterized in that, The on / off control mechanism includes a first elastic support and a trigger rod; the mounting cavity extends radially along the arc-shaped clamp, the trigger rod is slidably inserted into the mounting cavity, and the first end of the trigger rod passes through the arc-shaped clamp and extends outward; the first elastic support is connected between the trigger rod and the inner wall of the mounting cavity, and is used to provide an outward elastic biasing force to the trigger rod; the control end of the electromagnet is a pressure switch, and the second end of the trigger rod is spaced apart from the pressure switch; when the arc-shaped clamp is pressed against the side wall of the car wheel hub, the car wheel hub pushes the first end of the trigger rod, causing the trigger rod to slide inward along the mounting cavity until the second end of the trigger rod abuts against the pressure switch, thereby energizing the electromagnet.

8. The anti-tilting device for automobile wheel hub processing according to claim 5, characterized in that, The support frame has a vertically oriented groove, and a slider is slidably disposed within the groove. The connecting arm is cylindrical and rotatably inserted into the slider. The rotary drive mechanism includes a one-way rack and a gear. The gear is sleeved and fixed to the connecting arm, and the one-way rack is fixed vertically to the support frame. During the upward movement of the connecting arm, the teeth of the gear can slide against the teeth of the one-way rack. During the downward movement of the connecting arm, the one-way rack and the gear mesh with each other. Under the action of the one-way rack, the connecting arm rotates 180°.

9. The anti-tilting device for automobile wheel hub processing according to any one of claims 8, characterized in that, The length of the motion path of the two clamping plate assemblies driven by the height adjustment mechanism to rise or fall is equal to the stroke required for the gear to move along the one-way rack from the starting point of engagement to the ending point of engagement, which corresponds to a 180° rotation of the connecting arm.

10. The anti-tilting device for automobile wheel hub processing according to any one of claims 1 to 8, characterized in that, The lower surface of the base is provided with a positioning keyway and bolt mounting holes for precisely aligning and fixing the base onto the worktable of the machine tool.

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