A punching device for hub machining

Abstract

The application discloses a punching equipment for hub machining, which comprises a clamping mechanism, the clamping mechanism comprises a positioning arm in an arc structure, a pressing mechanism is arranged on the clamping arm and used for pressing the bottom of the hub, and a pushing mechanism is used for linkage expansion of a sliding table on a punching platform. The clamping arm is in sliding connection, when the punching equipment punches a hole position, the position of the clamping arm is changed by sliding the clamping arm, and the position of the hub is changed by sliding the clamping arm because the clamping arm clamps the side of the hub, so that the punching position of the hub is changed, and continuous punching is realized. The structure design of the pressing mechanism and the clamping mechanism realizes the double constraints of left-right direction positioning in the horizontal plane and axial pressing in the vertical direction. The pushing mechanism is matched with the clamping mechanism and the pressing mechanism, the structure design of the original punching platform does not need to be changed, and the pushing mechanism is simple to disassemble and assemble, and the design concept is modular, light and lossless.

Description

Technical Field

[0001] This invention belongs to the field of punching technology, and specifically relates to a punching device for wheel hub processing. Background Technology

[0002] As a crucial component of automobiles, the machining precision of wheel hubs directly impacts the vehicle's driving safety and aesthetics. Punching is a key process in wheel hub manufacturing, primarily used to machine bolt holes, valve stem holes, and weight-reducing holes on the wheel rim and spokes. Traditional wheel hub punching equipment typically employs two processing methods: single-station punching, where only one hole is machined per clamping cycle, requiring complete removal of the wheel hub from the fixture and re-clamping before machining the next hole; and multi-station punching, which achieves the machining of multiple holes by moving the punching equipment itself or adjusting the punch position.

[0003] However, the above-mentioned traditional methods have obvious shortcomings: First, multiple clamping operations lead to low efficiency. In single-station punching mode, clamping and unclamping are required for each hole to be processed, resulting in long auxiliary time, low production efficiency, and difficulty in meeting the needs of large-scale production.

[0004] Second, the structure of the mobile equipment is complex. Moving heavy punching equipment or punches to achieve repositioning not only places high demands on the drive system and consumes a lot of energy, but also makes it difficult to guarantee the rigidity and stability of the equipment. Under the impact load of punching, vibration and displacement are easily generated, affecting the processing accuracy.

[0005] Third, automation upgrades are costly. Most existing punching platforms are fixed structures. To achieve automated continuous punching, large-scale modifications to the platform itself are usually required, or even the entire machine needs to be replaced. These upgrades are very costly, especially for small and medium-sized enterprises.

[0006] Fourth, there is a lack of effective clamping coordination. Most existing clamping mechanisms clamp in one direction only. Under the huge impact force generated during punching, the hub is prone to jumping or displacement, resulting in hole misalignment or punch breakage, which affects processing quality and mold life. Summary of the Invention

[0007] The purpose of this invention is to provide a punching device for wheel hub processing to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A punching device for wheel hub processing includes a punching device and a punching platform, the punching platform being located directly below the punching device. It also includes a clamping mechanism, which comprises an arc-shaped positioning arm. An extension platform is fixedly connected to the outer side of the positioning arm, and the extension platform is provided with a mating block. The mating block is slidably assembled with the punching platform. A clamping arm is slidably connected to the inner side of the positioning arm, and the clamping arm slides along the inner side of the positioning arm and fits against the outer wall of the wheel hub. A pressing mechanism is provided on the clamping arm for pressing the bottom of the wheel hub. It also includes a pushing mechanism, which is mounted on the punching platform and near the rear of the extension platform. The pushing mechanism is detachably connected to the extension platform and is used to drive the extension platform to slide along the punching platform.

[0009] Preferably, an angle motor is fixedly connected to the side wall of the punching equipment. The output end of the angle motor is connected to the side wall of the punching equipment. A connector is fixedly connected to one end of the angle motor. An extension arm is rotatably connected to one side of the connector. An elevation motor for driving the relative rotation of the extension arm and the connector is fixedly connected between them to realize the elevation rotation of the connector.

[0010] Preferably, it also includes a lifting frame, which is fixedly installed on the ground. A reversing motor is installed inside the lifting frame, and a transmission disc is installed at the output end of the reversing motor. Two sliding platforms are symmetrically fixedly connected to the transmission disc. Each sliding platform has a sliding groove. An adjustable pitch motor is fixedly connected between the two sliding platforms. The output end of the adjustable pitch motor is equipped with two output gear discs. The bottom of the extension arm is provided with an adapter block that slides and slidably assembles with the sliding groove. Edge teeth are provided on both sides of the adapter block that mesh with the output gear discs.

[0011] Preferably, the bottom inner side of the positioning arm has a stepped layer that matches the shape of the wheel hub.

[0012] Preferably, the clamping arm is configured as an arc-shaped structure, the inner side of the positioning arm is provided with an arc-shaped track groove, and the bottom outer side of the clamping arm is provided with an arc-shaped track block that is slidably assembled with the track groove.

[0013] Preferably, a rotary motor is fixedly connected to the surface of the expansion platform, and an output gear is connected to the output end of the rotary motor. The outer surface of the clamping arm is provided with a toothed surface along its arc direction, and the toothed surface meshes with the output gear.

[0014] Preferably, the clamping mechanism includes an arc-shaped clamping plate located at the bottom end of the clamping arm. Three clamping rods are evenly distributed on one side of the clamping plate. The clamping rods are inserted into the clamping arm and installed therein. A return spring is installed between the clamping arm and the clamping rods.

[0015] Preferably, an expansion plate is fixedly connected to the middle part of the outer side of the clamping arm, a slide rod is fixedly connected to the expansion plate, a pressure motor is fixedly connected to the bottom of the expansion plate, a threaded rod is connected to the output end of the pressure motor, a sleeve is slidably mounted on the slide rod, a threaded sleeve is threadedly engaged on the threaded rod, a pressure support rod is fixedly connected between the sleeve and the threaded sleeve, pressure plates are fixedly connected to the two sides and the middle part of the pressure support rod, the three pressure plates are concentric with the three pressure rods, and a branch rod is welded and fixed to the inner wall of the pressure support rod.

[0016] Preferably, the pushing mechanism includes a pushing plate, an insert fixedly connected to the inner side of the pushing plate and slidably adapted to the punching platform, a shaft block fixedly connected to the top of the pushing plate, a ball screw sleeve fixedly connected inside the shaft block, and a joint groove formed on the surfaces of the extension platform and the pushing plate, with a sleeve block embedded inside the joint groove.

[0017] Preferably, the pushing mechanism further includes a gearbox, which is detachably fixedly mounted on the surface of the punching platform. The gearbox has a worm gear and a worm wheel that are adapted to each other installed inside. An output motor is installed on the outside of the gearbox. The output end of the output motor is connected to the worm gear. An output screw is fixedly connected to the central shaft of the worm wheel. The output screw is used in conjunction with the ball screw sleeve to drive the pushing plate to move along the axial direction of the output screw.

[0018] The technical solution of this invention has the following beneficial effects: 1. The clamping arm features a sliding connection. When the punching machine completes punching one hole, the position of the clamping arm is changed by sliding it. Because the clamping arm clamps the side of the hub, sliding the clamping arm changes the position of the hub, thus changing the punching position of the hub and enabling continuous punching. This eliminates the need to completely remove the hub from the fixture or stop the machine to adjust the overall position of the punching equipment. Simply by sliding the clamping arm, the clamped hub can move within the arc-shaped track groove of the positioning arm, quickly aligning the next hole to be processed with the punch. This achieves continuous processing of multiple holes with a single clamping, eliminating the auxiliary time wasted due to repeated clamping and significantly improving the production cycle and processing efficiency of hub punching.

[0019] 2. Simultaneously, a clamping mechanism is used. When the clamping arm needs to be rotated, the clamping mechanism releases its pressure on the bottom of the hub. At this time, the hub is only held laterally by the clamping arm, in a "semi-constrained" state. When the clamping arm brings the hub to the target hole and stops, the clamping mechanism immediately activates, applying a set pressure to firmly press the bottom edge of the hub, dynamically introducing vertical stiffness to suppress punching impact and vibration, preventing the hub from jumping or displacing due to impact. This ensures precise positioning of the punching position and extends the service life of the punch. The structural design of the clamping and holding mechanisms achieves dual constraints of lateral positioning of the hub in the horizontal plane and axial clamping in the vertical direction, providing a stable and reliable clamping foundation for subsequent punching processing.

[0020] 3. In the pushing mechanism, the output motor drives the worm gear to rotate, and the worm wheel rotates synchronously. A shaft in the middle of the worm wheel transmits power to the output lead screw. The output lead screw engages with a ball screw sleeve, causing the pushing plate to slide within the punching platform, thus achieving the automatic clamping and releasing function of the clamping arm. The pushing mechanism, combined with the clamping and pressing mechanisms, does not require changes to the original structural design of the punching platform and is easy to assemble and disassemble. This modular, lightweight, and non-destructive design concept allows older equipment to be upgraded to automation at minimal cost, while new equipment gains stronger functional expansion capabilities. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the overall planar structure of the present invention.

[0024] Figure 3 This is a schematic diagram of the punching device of the present invention.

[0025] Figure 4 This is a schematic diagram of the boom connection and installation of the present invention.

[0026] Figure 5 This is a schematic diagram of the disassembly and assembly of the boom of the present invention.

[0027] Figure 6 This is a diagram showing the assembly and use of the upper arm of the present invention.

[0028] Figure 7 This is a schematic diagram of the clamping mechanism of the present invention.

[0029] Figure 8 This is a diagram showing the deformation state of the clamping arm of the present invention.

[0030] Figure 9 This is a diagram showing the initial state of the clamping arm of the present invention.

[0031] Figure 10 This is a diagram of the hub clamping structure of the present invention.

[0032] Figure 11 This is a three-dimensional cross-sectional view of the hub clamping mechanism of the present invention.

[0033] Figure 12 This is an enlarged view of point A in the present invention.

[0034] Figure 13 This is a schematic diagram of the punching platform structure of the present invention.

[0035] Figure 14 This is a schematic diagram of the internal structure of the gearbox of the present invention.

[0036] Figure 15 This is a schematic diagram of the installation of the sleeve block according to the present invention.

[0037] Figure 16 This is a schematic diagram of the bottom structure of the push plate of the present invention.

[0038] Reference numerals: 10. Punching equipment; 101. Lifting frame; 102. Reversing motor; 103. Transmission plate; 104. Sliding platform; 105. Slide groove; 106. Adjustable pitch motor; 107. Output gear plate; 108. Extension arm; 109. Adaptor block; 110. Edge tooth; 111. Angle motor; 112. Connector; 113. Elevation motor; 20. Punching platform; 201. Fixed base; 202. Adjustable pitch handle; 203. Lifting support leg; 204. Lifting motor; 205. Control platform; 206. Platform slot; 30. Clamping mechanism; 301. Positioning arm; 3011. Step layer; 302. Extension platform; 303. Mating block; 304. Track groove 305. Rotary motor; 306. Output gear; 307. Clamping arm; 3071. Tooth surface; 308. Track block; 309. Pressure plate; 310. Pressure rod; 311. Return spring; 312. Extension disc; 313. Slide rod; 314. Threaded rod; 315. Pressure motor; 316. Pressure support rod; 317. Sleeve; 318. Threaded sleeve; 319. Pressure disc; 320. Branch rod; 321. Connecting groove; 322. Sleeve block; 40. Pushing mechanism; 401. Push plate; 402. Insert; 403. Shaft block; 404. Ball screw sleeve; 405. Gearbox; 406. Output motor; 407. Worm gear; 408. Worm wheel; 409. Output screw. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0040] Example 1: Reference Figures 1-16 , A punching device for wheel hub processing includes a punching device 10 and a punching platform 20, wherein the punching platform 20 is located directly below the punching device 10; In this embodiment of the invention, the punching platform 20 is a conventional platform structure. Platform slots 206 are provided on both the surface and sides of the punching platform 20, and a fixed base 201 is slidably mounted on the bottom of the punching platform 20. This relative sliding allows for horizontal adjustment of the punching platform 20 in the left-right direction, specifically achieved through a threaded transmission via rotating the adjustment handle 202. A lifting support leg 203 is mounted on the bottom of the fixed base 201, and a lifting motor 204 is installed at the center of the fixed base 201. The lifting motor 204 is used to raise or lower the height of the punching platform 20 to adapt to the punching depth of the punching equipment 10. A control platform 205 is located below the punching platform 20. This punching platform 20 represents a prior art solution.

[0041] It also includes a clamping mechanism 30, which includes a positioning arm 301 with an arc-shaped structure. An extension platform 302 is fixedly connected to the outer side of the positioning arm 301. The extension platform 302 is provided with a mating block 303. The mating block 303 is slidably assembled with the punching platform 20. A clamping arm 307 is slidably connected to the inner side of the positioning arm 301. The clamping arm 307 slides along the inner side of the positioning arm 301 and fits against the outer wall of the wheel hub. A pressing mechanism is provided on the clamping arm 307 for pressing the bottom of the wheel hub. In this embodiment of the invention, the arc-shaped positioning arm 301 is designed to fit the arc-shaped profile reference on the outer wall of the wheel hub. Figure 11 and Figure 12This ensures that the clamping mechanism 30 can fit snugly against the cylindrical outer surface of the wheel hub, thus providing a stable radial positioning base. The curvature design of the positioning arm 301 needs to be parametrically configured according to common wheel hub specifications to accommodate wheel hubs of different diameters. The extension platform 302 extends along the outer central axis of the positioning arm 301, and its extension length needs to ensure a sliding fit between the mating block 303 and the platform slot 206 on the surface of the punching platform 20. The mating block 303 adopts an inverted T-shaped cross-section structure, forming an interlocking guide relationship with the platform slot 206. In another embodiment, a wear-resistant pad is provided at the bottom of the mating block 303 to reduce the coefficient of sliding friction, enabling the overall lateral position adjustment of the clamping mechanism 30 along the surface of the punching platform 20.

[0042] The clamping arm 307 has its length direction aligned with the radial direction of the positioning arm 301. A polyurethane plate is located on the side of the clamping arm 307 that contacts the wheel hub to provide localized elastic clamping of the wheel hub's outer wall. By adjusting the lateral position of the mating block 303 in the platform slot 206, the wheel hub on the punching platform 20 is stably clamped by the clamping arm 307, ensuring that the wheel hub does not shift during punching.

[0043] In summary, the clamping arm 307 is slidably connected. When the punching machine 10 punches a hole, the position of the clamping arm 307 is changed by sliding it. Because the clamping arm 307 clamps the side of the wheel hub, sliding the clamping arm 307 will change the position of the wheel hub, thereby changing the punching position of the wheel hub and achieving continuous punching. It is not necessary to completely remove the wheel hub from the fixture, nor is it necessary to stop the machine to adjust the overall position of the punching machine 10. By simply sliding the clamping arm 307, the clamped wheel hub can be moved within the arc-shaped track groove 304 of the positioning arm 301, so that the next hole to be processed on the wheel hub can be quickly aligned with the punch. This achieves continuous processing of multiple holes with a single clamping, eliminates the auxiliary time wasted due to repeated clamping, and significantly improves the production cycle and processing efficiency of wheel hub punching. Simultaneously, with the clamping mechanism, when the clamping arm 307 needs to be rotated, the clamping mechanism releases its pressure on the bottom of the hub. At this time, the hub is only laterally clamped by the clamping arm 307, in a "semi-constrained" state. When the clamping arm 307 brings the hub to the target hole and stops, the clamping mechanism immediately actuates to firmly press the bottom edge of the hub with a set pressure, dynamically introducing vertical stiffness to suppress punching impact and vibration, preventing the hub from jumping or displacing due to impact, thereby ensuring accurate positioning of the punching position and extending the service life of the punch. The structural design of the clamping mechanism and the holding mechanism 30 achieves dual constraints of lateral positioning of the hub in the horizontal plane and axial clamping in the vertical direction, providing a stable and reliable clamping foundation for subsequent punching processing.

[0044] It also includes a pushing mechanism 40, which is mounted on the punching platform 20 and close to the tail of the extension stage 302. The pushing mechanism 40 is detachably connected to the extension stage 302 and is used to drive the extension stage 302 to slide along the punching platform 20.

[0045] In this embodiment of the invention, the pushing mechanism 40 is used to push the clamping mechanism 30 to move, so that the extension platform 302 in the clamping mechanism 30 slides in the platform slot 206 through the mating block 303, thereby realizing the clamping arm 307 clamping and stabilizing the wheel hub on the punching platform 20.

[0046] Example 2: Reference Figures 1-6 , An angle motor 111 is fixedly connected to the side wall of the punching equipment 10. The output end of the angle motor 111 is connected to the side wall of the punching equipment 10. A connector 112 is fixedly connected to one end of the angle motor 111. An extension arm 108 is rotatably connected to one side of the connector 112. An elevation motor 113 for driving the relative rotation of the extension arm 108 and the connector 112 is fixedly connected between them, so as to realize the elevation rotation of the connector 112.

[0047] In this embodiment of the invention, the angle motor 111 controls the rotation of the punching device 10 relative to the extended arm 108, and the elevation motor 113 adjusts the elevation angle of the punching device 10. When the hub has a curved structure, such as a spoke bevel or a rim arc surface, the two motors work together to ensure that the punch axis is always perpendicular to the surface to be processed. Normal punching ensures that the punched edges are neat, without skewing or burrs, significantly improving the quality and consistency of the holes and avoiding die wear or workpiece tearing caused by oblique punching. Through the rotation of the angle motor 111 and the elevation of the elevation motor 113, the working range of the punching device 10 is expanded from a "point" to a "spherically covered area"; without moving the entire large punching device frame, it can cover holes of different diameters, heights, and tilt angles on the hub, enhancing the equipment's compatibility with hubs of different sizes and shapes, and is especially suitable for irregularly shaped or customized hubs that require multi-angle processing.

[0048] It also includes a lifting frame 101, which is fixed on the ground. A reversing motor 102 is installed inside the lifting frame 101. A transmission disc 103 is installed at the output end of the reversing motor 102. Two sliding platforms 104 are symmetrically fixedly connected to the transmission disc 103. Each sliding platform 104 has a sliding groove 105. An adjustable pitch motor 106 is fixedly connected between the two sliding platforms 104. Two output gear discs 107 are assembled at the output end of the adjustable pitch motor 106. An adapter block 109 is provided at the bottom of the extension arm 108 and slides in the sliding groove 105. Edge teeth 110 are provided on both sides of the adapter block 109 and mesh with the output gear discs 107.

[0049] In the embodiments of the present invention, reference is made to Figures 4-6 By activating the pitch-adjusting motor 106, the two output gear discs 107 rotate, meaning the edge teeth 110 mesh with the output gear discs 107. The extended arm 108 slides within the slide groove 105 via the adapter block 109, thereby changing the horizontal direction of the extended arm 108. Simultaneously, the reversing motor 102 drives the transmission disc 103 to rotate, thus rotating the angle of the extended arm 108. This combination allows the punching equipment 10 to move freely in the horizontal plane without moving the bulky machine or repeatedly clamping workpieces. This not only significantly improves the processing range and flexibility of the equipment but also ensures positioning accuracy and dynamic stability through high-rigidity transmission, laying a solid motion foundation for efficiently and accurately completing continuous punching of multi-position holes in wheel hubs.

[0050] Example 3: The positioning arm 301 has a stepped layer 3011 on its inner bottom side that adapts to the shape of the wheel hub. This stepped layer 3011 allows the positioning arm 301 to better fit the outer wall of the wheel hub, facilitating proper alignment and placement by workers. It should be noted that different wheel hubs have different shapes and structures; therefore, the appropriate stepped layer 3011 must be matched to the specific shape of the wheel hub. (See reference below.) Figure 12 In the middle, the lowest end of the stepped layer 3011 does not directly contact the bottom end of the wheel hub, leaving a gap. The bottom of the clamping arm 307 also has a certain space to avoid interference. The space left at the bottom of the clamping arm 307 is to provide sufficient room for the clamping mechanism to achieve the clamping and releasing effect in this space.

[0051] The clamping arm 307 is configured with an arc-shaped structure. An arc-shaped track groove 304 is provided on the inner side of the positioning arm 301. An arc-shaped track block 308 is provided at the bottom outer side of the clamping arm 307 and is slidably assembled with the track groove 304.

[0052] In this embodiment, the clamping arm 307 described above is used to clamp the wheel hub. The arc-shaped clamping arm 307 is designed to better fit the outer surface of the wheel hub, thereby increasing the contact area, dispersing the clamping force, and avoiding localized indentations or deformation damage to the wheel hub surface. The sliding fit design of the arc-shaped track groove 304 and the arc-shaped track block 308 allows the clamping arm 307 to move smoothly along a preset arc path during clamping. This ensures the smoothness of the clamping action and, through track constraints, ensures the motion accuracy of the clamping arm 307, preventing it from shifting or wobbling during clamping. This guide structure design allows the clamping force of the clamping arm 307 to be applied evenly to the outer circumference of the wheel hub, improving the stability and reliability of clamping. At the same time, the assembly method of the arc-shaped track block 308 being embedded in the track groove 304 results in a compact structure and small footprint, providing favorable conditions for the movement space reserved at the bottom of the clamping arm 307 for the pressing mechanism, achieving optimized integration of spatial layout. When the clamping arm 307 moves, the arc-shaped track block 308 slides along the track groove 304, forming a stable guide support. This effectively reduces motion friction resistance, improves response speed and positioning accuracy, and ensures that the wheel hub maintains a precise center positioning state throughout the punching process. (See details...) Figures 7-9 The front end of the track block 308 and the track groove 304 adopts a circular structure, and the size of the opening end of the track groove 304 gradually decreases. In this way, the cooperation between the track block 308 and the track groove 304 can make the clamping arm 307 stably slide in the positioning arm 301.

[0053] A rotary motor 305 is fixedly connected to the surface of the extension platform 302. An output gear 306 is connected to the output end of the rotary motor 305. A toothed surface 3071 is provided on the outer surface of the clamping arm 307 along its arc direction. The toothed surface 3071 meshes with the output gear 306.

[0054] In this embodiment of the invention, the rotary motor 305, upon startup, drives the output gear 306 to rotate. The rotation of the output gear 306 meshes with the tooth surface 3071, thereby driving the clamping arm 307 to move in an arc within the track groove 304 via the track block 308. This allows the clamping arm 307 to rotate the clamped hub, thus changing the punching position of the hub and achieving continuous punching. The rotary motor 305 uses a servo motor or a stepper motor to improve control precision. Regarding the rotation angle of the clamping arm 307: the maximum rotation angle of the clamping arm 307 should preferably not exceed one-third of the positioning arm 301. Specific angle control can be achieved by preset angle parameters in the control system of the rotary motor 305.

[0055] refer to Figures 7-12During the punching process, a clamping mechanism is used to clamp the bottom of the hub. The clamping mechanism includes a clamping plate 309 arranged in an arc shape. The clamping plate 309 is located at the bottom end of the clamping arm 307. Three clamping rods 310 are evenly distributed on one side of the clamping plate 309. The clamping rods 310 are installed inside the clamping arm 307. A return spring 311 is installed between the clamping arm 307 and the clamping rods 310.

[0056] In this embodiment of the invention, the arc-shaped clamping plate 309 is attached to the bottom of the clamping arm 307. The arc-shaped structure design can fit and press against the bottom of the wheel hub. The clamping plate 309 is slidably assembled with the clamping arm 307 through the clamping rod 310. When the clamping rod 310 moves downward, the clamping plate 309 presses against the bottom of the wheel hub. When the clamping rod 310 moves downward, the vertical clamping force on the wheel hub is released. In this way, the clamping arm 307 can drive the wheel hub to rotate and adjust the angle. Here, the return spring 311 maintains an upward thrust, that is, the return spring 311 ensures that the initial state of the clamping plate 309 is always attached to the bottom of the clamping arm 307. By pressing the three clamping rods 310, the clamping plate 309 moves down to press against the bottom of the wheel hub, forming a stable vertical constraint. The spring constant of the return spring 311 needs to be precisely calculated and designed to ensure that the clamping plate 309 is in close contact with the bottom of the clamping arm 307 under normal conditions without shaking, and to provide appropriate buffer stroke when under pressure to avoid rigid impact damage to the wheel hub surface.

[0057] The top of the clamping rod 310 is provided with a limiting boss, which serves as a support surface for the return spring 311 and prevents the clamping rod 310 from disengaging from the clamping arm 307. The three clamping rods 310 are distributed along the arc of the clamping arm 307. This arrangement ensures that the vertical pressure applied by the clamping plate 309 is evenly distributed on the bottom of the wheel hub, effectively preventing the wheel hub from tilting or shifting due to uneven force during the punching process.

[0058] The surface of the clamping plate 309 facing the bottom of the wheel hub is covered with a wear-resistant rubber layer. This rubber layer has a grid-like anti-slip texture, which increases the coefficient of friction with the bottom of the wheel hub, preventing slight slippage of the wheel hub during punching, and also avoids surface scratches caused by direct metal-to-metal contact. The rubber layer is designed to be 3 to 5 mm thick, providing sufficient cushioning without affecting the transmission of clamping accuracy due to excessive compression.

[0059] An expansion plate 312 is fixedly connected to the middle part of the outer side of the clamping arm 307. A slide rod 313 is fixedly connected to the expansion plate 312. A pressure motor 315 is fixedly connected to the bottom of the expansion plate 312. A threaded rod 314 is connected to the output end of the pressure motor 315. A sleeve 317 is slidably mounted on the slide rod 313. A threaded sleeve 318 is threadedly engaged on the threaded rod 314. A pressure support rod 316 is fixedly connected between the sleeve 317 and the threaded sleeve 318. Pressure plates 319 are fixedly connected to the two sides and the middle part of the pressure support rod 316. The three pressure plates 319 are concentric with the three pressure rods 310. A branch rod 320 is welded and fixed to the inner wall of the pressure support rod 316.

[0060] In this embodiment of the invention, the sliding rod 313 and the threaded rod 314 are arranged side by side, with the sleeve 317 and the threaded sleeve 318 respectively installed on the sliding rod 313 and the threaded rod 314. When the threaded rod 314 rotates, it engages with the threaded sleeve 318, thereby causing the clamping support rod 316 to rise or fall. The three clamping discs 319 are concentrically aligned with the three clamping rods 310. Thus, when the clamping support rod 316 moves downward, its clamping discs 319 push the clamping rods 310 downward, thereby pressing the clamping plate 309 against the bottom of the wheel hub. When the wheel hub angle needs to be adjusted, the operator can start the clamping motor 315 via external control. The clamping discs 319 release the downward pressure on the three clamping rods 310, and the return spring 311 quickly rebounds, lifting the clamping plate 309 to the initial position. At this time, the clamping plate 309 separates from the bottom of the wheel hub, and the vertical constraint is released. Driven by the rotary motor 305, the clamping arm 307 can drive the wheel hub to rotate precisely around its central axis. After rotating into position, the clamping rod 310 is pressed down again to re-establish the vertical clamping and fixing of the wheel hub. The whole process does not require completely releasing the clamping of the wheel hub, which significantly improves processing efficiency.

[0061] Example 4: Reference Figures 13-16 , The pushing mechanism 40 includes a pushing plate 401, an insert 402 fixedly connected to the inner side of the pushing plate 401 and slidingly adapted to the punching platform 20, a ball screw sleeve 404 fixedly connected inside the shaft block 403, and a joint groove 321 opened on the surface of the extension platform 302 and the pushing plate 401, with a sleeve 322 embedded inside the joint groove 321.

[0062] In this implementation plan, reference is made to Figure 15The push plate 401 is used in conjunction with an insert 402 on its inner wall that slides and engages with the platform slot 206. The push plate 401 can be directly installed without altering the existing structure of the punching platform 20. The combined groove 321 is a complete "I" shape, which is independently represented as a "T" shape in the push plate 401 and the expansion stage 302. The push plate 401 and the expansion stage 302 combine to form an "I" shape, meaning the sleeve 322 is also "I" shaped. The sleeve 322 is engaged in the combined groove 321 formed between the push plate 401 and the expansion stage 302. Thus, when the push plate 401 moves, it synchronously drives the expansion stage 302 to move left and right, thereby achieving automatic clamping via the clamping arm 307. A handle is provided on one side of the sleeve 322 for easy handling and removal.

[0063] The pushing mechanism 40 also includes a gearbox 405, which is detachably fixedly mounted on the surface of the punching platform 20. The gearbox 405 has a worm gear 407 and a worm wheel 408 that are adapted to each other installed inside. An output motor 406 is installed on the outside of the gearbox 405. The output end of the output motor 406 is connected to the worm gear 407. An output screw 409 is fixedly connected to the central shaft of the worm wheel 408. The output screw 409 is used in conjunction with a ball screw sleeve 404 to drive the pushing plate 401 to move along the axial direction of the output screw 409.

[0064] In the embodiments of the present invention, reference is made to Figure 13 and Figure 14 The gearbox 405 adopts the transmission principle of worm gear 407 and worm wheel 408. The output motor 406 drives the worm gear 407 to rotate, and the worm wheel 408 rotates synchronously. There is a shaft in the middle of the worm wheel 408, through which the power is output to the output screw 409. The output screw 409 cooperates with the ball screw sleeve 404, and the push plate 401 slides in the punching platform 20 to realize the automatic clamping and releasing function of the clamping arm 307.

[0065] In summary, in the above implementation scheme, the pushing mechanism 40, combined with the clamping mechanism 30 and the pressing mechanism, does not require any changes to the original structural design of the punching platform 20, and is easy to assemble and disassemble. This modular, lightweight, and non-destructive design concept enables old equipment to achieve automated upgrades at the lowest cost, while new equipment gains stronger functional expansion capabilities.

[0066] The specific implementation process of this invention is as follows: The wheel hub to be punched is placed on the surface of the punching platform 20. The output motor 406 is started to drive the worm gear 407 to rotate, and the worm wheel 408 rotates synchronously. The output screw 409 cooperates with the ball screw sleeve 404, and the push plate 401 slides in the punching platform 20 to achieve the clamping arm 307 to clamp the outer wall of the wheel hub. At the same time, the pressing motor 315 is started, so that the pressing plate 319 presses against the top of the pressing rod 310. In this way, the pressing plate 309 moves down and presses against the bottom end of the wheel hub. Then, the working punching is performed by the punching equipment 10.

[0067] According to usage requirements: Angle motor 111 is used to control the rotation of punching equipment 10 relative to the extension arm 108, and elevation motor 113 is used to adjust the elevation angle of punching equipment 10. By starting the pitch motor 106, the two output gears 107 rotate, that is, the edge teeth 110 mesh with the output gears 107, and the horizontal direction of the extension arm 108 is changed. At the same time, the reversing motor 102 drives the transmission disk 103 to rotate, thereby rotating the angle of the extension arm 108. The above usage requirements are all for adjusting and aligning the punching position of the punching equipment 10.

[0068] When the wheel hub angle needs to be adjusted, the operator can start the externally controlled clamping motor 315. The clamping plate 319 releases the downward pressure on the three clamping rods 310, and the return spring 311 quickly rebounds, lifting the clamping plate 309 to its initial position. At this time, the clamping plate 309 separates from the bottom of the wheel hub, and the vertical constraint is released. Driven by the rotary motor 305, the clamping arm 307 can drive the wheel hub to rotate precisely around its central axis. After rotating to the correct position, the clamping rods 310 are pressed down again to re-establish the vertical clamping and fixing of the wheel hub.

[0069] The above embodiments are merely exemplary models of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Various modifications or equivalent substitutions can be made to the present invention within its spirit and scope of protection. Such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

[0070] In the description of this invention, it should be noted that the terms "inner," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the appended circle, or the orientation or positional relationship in which the product of this invention is conventionally placed during use. They are used 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. Therefore, these terms indicating orientation or positional relationships should not be construed as limitations on the invention.

[0071] In the description of this invention, it should be further noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, these terms can refer to a fixed connection, a detachable connection, or an integral connection between elements; they can also refer to a mechanical connection or an electrical connection; or they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

Claims

1. A punching device for wheel hub processing, comprising a punching device (10) and a punching platform (20), wherein the punching platform (20) is located directly below the punching device (10), characterized in that: It also includes a clamping mechanism (30), which includes a positioning arm (301) with an arc-shaped structure. An extension platform (302) is fixedly connected to the outer side of the positioning arm (301). The extension platform (302) is provided with a mating block (303). The mating block (303) is slidably assembled with the punching platform (20). A clamping arm (307) is slidably connected to the inner side of the positioning arm (301). The clamping arm (307) slides along the inner side of the positioning arm (301) and fits against the outer wall of the wheel hub. A pressing mechanism is provided on the clamping arm (307) for pressing the bottom of the wheel hub. It also includes a pushing mechanism (40), which is mounted on the punching platform (20) and close to the tail of the extension platform (302). The pushing mechanism (40) is detachably connected to the extension platform (302) and is used to drive the extension platform (302) to slide along the punching platform (20).

2. The piercing apparatus for machining a wheel hub according to claim 1, characterized in that: An angle motor (111) is fixedly connected to the side wall of the punching device (10). The output end of the angle motor (111) is connected to the side wall of the punching device (10). A connector (112) is fixedly connected to one end of the angle motor (111). An extension arm (108) is rotatably connected to one side of the connector (112). An elevation motor (113) for driving the relative rotation of the extension arm (108) and the connector (112) is fixedly connected to achieve the elevation rotation of the connector (112).

3. The piercing apparatus for machining a wheel hub according to claim 2, characterized in that: It also includes a lifting frame (101), which is fixed on the ground. A reversing motor (102) is installed inside the lifting frame (101). A transmission disk (103) is installed at the output end of the reversing motor (102). Two sliding platforms (104) are symmetrically fixedly connected on the transmission disk (103). Each sliding platform (104) has a slide groove (105). An adjustable pitch motor (106) is fixedly connected between the two sliding platforms (104). Two output gears (107) are assembled at the output end of the adjustable pitch motor (106). An adapter block (109) is provided at the bottom of the extension arm (108) and slides with the slide groove (105). Edge teeth (110) are provided on both sides of the adapter block (109) and mesh with the output gears (107).

4. The punching equipment for wheel hub processing according to claim 1, characterized in that: The bottom inner side of the positioning arm (301) is provided with a stepped layer (3011) that is compatible with the shape of the wheel hub.

5. The punching equipment for wheel hub processing according to claim 4, characterized in that: The clamping arm (307) is configured as an arc-shaped structure, and the inner side of the positioning arm (301) is provided with an arc-shaped track groove (304). The bottom outer side of the clamping arm (307) is provided with an arc-shaped track block (308) which is slidably assembled with the track groove (304).

6. The punching equipment for wheel hub processing according to claim 5, characterized in that: A rotary motor (305) is fixedly connected to the surface of the extension platform (302). An output gear (306) is connected to the output end of the rotary motor (305). A toothed surface (3071) is provided on the outer surface of the clamping arm (307) along its arc direction. The toothed surface (3071) meshes with the output gear (306).

7. A punching device for wheel hub processing according to claim 6, characterized in that: The clamping mechanism includes an arc-shaped clamping plate (309) located at the bottom end of the clamping arm (307). Three clamping rods (310) are evenly distributed on one side of the clamping plate (309). The clamping rods (310) are inserted into the clamping arm (307) and installed. A return spring (311) is installed between the clamping arm (307) and the clamping rods (310).

8. A punching device for wheel hub processing according to claim 7, characterized in that: An expansion plate (312) is fixedly connected to the middle part of the outer side of the clamping arm (307). A slide rod (313) is fixedly connected to the expansion plate (312). A pressure motor (315) is fixedly connected to the bottom of the expansion plate (312). A threaded rod (314) is connected to the output end of the pressure motor (315). A sleeve (317) is slidably mounted on the slide rod (313). A threaded sleeve (318) is threadedly engaged on the threaded rod (314). A pressure support rod (316) is fixedly connected between the sleeve (317) and the threaded sleeve (318). Pressure plates (319) are fixedly connected to the two sides and the middle part of the pressure support rod (316). The three pressure plates (319) are concentric with the three pressure rods (310). A branch rod (320) is welded and fixed to the inner wall of the pressure support rod (316).

9. A punching device for wheel hub processing according to claim 8, characterized in that: The pushing mechanism (40) includes a pushing plate (401), an insert (402) is fixedly connected to the inner side of the pushing plate (401) and slides to fit the punching platform (20), a shaft block (403) is fixedly connected to the top of the pushing plate (401), a ball screw sleeve (404) is fixedly connected inside the shaft block (403), and a joint groove (321) is opened on the surface of the extension platform (302) and the pushing plate (401), and a sleeve block (322) is embedded inside the joint groove (321).

10. A punching device for wheel hub processing according to claim 9, characterized in that: The pushing mechanism (40) also includes a gearbox (405), which is detachably fixedly mounted on the surface of the punching platform (20). The gearbox (405) has a worm gear (407) and a worm wheel (408) that are adapted to each other installed inside. An output motor (406) is installed on the outside of the gearbox (405). The output end of the output motor (406) is connected to the worm gear (407). An output screw (409) is fixedly connected to the central shaft of the worm wheel (408). The output screw (409) is used in conjunction with the ball screw sleeve (404) to drive the pushing plate (401) to move along the axial direction of the output screw (409).

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