A metal motor heat sink fin stamping device

Abstract

This invention relates to the field of motor cooling fan fin processing technology, and discloses a metal motor cooling fan fin stamping device, including a worktable. A support is fixedly connected to the upper surface of the worktable. A leveling component for flattening the material is provided on the upper surface of the support. A punching component for cutting the sheet metal to a fixed length is provided on the upper surface of the support and at the rear end of the leveling component. A detection component for inspecting the punched metal sheet is provided on the upper surface of the worktable. A material conveying component for transporting the metal sheet is provided between the detection component and the support. This invention can repeatedly flatten the unwound metal sheet to gradually release the internal stress of the material, restoring the flatness of the sheet metal and avoiding springback, twisting, or cracking caused by stress release during subsequent processing. This effectively improves product dimensional accuracy and precise positioning of the metal sheet during processing.

Description

Technical Field

[0001] This invention relates to the field of motor cooling fan fin processing technology, specifically a metal motor cooling fan fin stamping device. Background Technology

[0002] With the rapid development of motor technology and the continuous improvement of motor power density and operating efficiency, the heat generated during operation has also increased. The quality of heat dissipation performance is directly related to the reliability, service life and energy efficiency of the motor. As the core component of the motor heat dissipation system, the cooling fan accelerates heat dissipation through forced convection. Its structural design and manufacturing precision have a decisive impact on heat dissipation efficiency.

[0003] Metal stamping technology, with its advantages of high efficiency, low cost, and suitability for mass production, has gradually become an important direction in the manufacturing of heat sink fins. Existing stamping equipment typically uses single-station or multi-station dies to form fins through processes such as blanking, stretching, and trimming. However, for the demand for metal fins, existing technologies still have the following problems:

[0004] 1. Metal sheets are usually in rolls before processing. After unwinding, the metal sheets are cut directly. However, the metal sheets may have slight bends. If they are not leveled, it will affect the accurate positioning of the metal sheets in the subsequent processing. Therefore, how to solve the problem of metal sheet bending is an urgent problem to be solved.

[0005] 2. During the falling process, the cut metal sheet will be deflected by the friction of the guide hopper and the resistance of the air. This will cause it to be deflected after landing on the receiving table. If it is not recalibrated, it will affect the positioning accuracy of the metal sheet, resulting in deviations in subsequent processing.

[0006] 3. The reliance on manual transfer and positioning between multiple processes is not only cumbersome to operate, but also results in low equipment integration and relatively low production efficiency.

[0007] 4. Before shaping the metal sheet, pre-processed parts that are identical to the finished product are directly punched out. During the shaping process, the pre-processed parts are prone to tilting in the mold, which can cause deviations in shaping, resulting in defective products, wasting sheet material, and increasing costs. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a metal motor cooling fan fin stamping device. The main solutions are as follows: Metal sheets are typically rolled before processing. After unwinding, the metal sheet is directly cut, but the sheet may have slight curvature. Failure to level it can affect the precise positioning of the sheet in subsequent processing. Furthermore, during the falling process, the sheet is subject to friction from the guide hopper and air resistance, causing it to deviate upon landing on the receiving platform. Failure to recalibrate this also affects the positioning accuracy, leading to deviations in subsequent processing. Relying on manual transfer and positioning between multiple processes is cumbersome, has low equipment integration, and low production efficiency. Additionally, directly stamping pre-processed parts with the same shape as the finished product before shaping the metal sheet can cause tilting within the mold during shaping, resulting in deviations, defective products, wasted sheet material, and increased costs.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A metal motor heat sink fin stamping device includes a worktable. A support is fixedly connected to the upper surface of the worktable. A leveling component for flattening materials is provided on the upper surface of the support. A punching component for cutting sheet metal to a fixed length is provided on the upper surface of the support and at the rear end of the leveling component. A detection component for detecting the punched metal sheet is provided on the upper surface of the worktable. A material conveying component for conveying the metal sheet is provided between the detection component and the support. Two support assemblies are provided on the top of the worktable. Each support assembly contains a cutting component for trimming the metal sheet and a shaping component for stamping and shaping the metal sheet. Three sets of transverse moving components are provided on the top of the worktable. The three sets of transverse moving components are located between the detection component and the cutting component, between the cutting component and the shaping component, and in front of the shaping component. Each transverse moving component is equipped with a suction component for quickly adsorbing and fixing the metal sheet and a material picking component for removing the remaining waste material and finished fan fins after shaping.

[0011] Furthermore, the leveling assembly includes two symmetrical crossbars fixedly connected to the upper surface of the support frame one. Support rods are fixedly connected to the upper surfaces of both crossbars. A top plate is fixedly connected to the top of multiple support rods. A bottom plate is fixedly connected to the upper surface of the support frame one, located between the two crossbars. A hydraulic cylinder is fixedly connected to the upper surface of the top plate. A pressure plate is fixedly connected to the output end of the hydraulic cylinder through the lower surface of the top plate. Two symmetrical support plates are fixedly connected to the upper surfaces of both crossbars. Two rotating rollers are rotatably connected between opposing support plates via bearings. Rubber sleeves are adhered to the outer circumference of multiple rotating rollers. One end of the lower rotating roller in each set passes through the support plate and is fixedly connected to pulley one and pulley two via bolts. Pulley one and pulley two are connected via belt drive. A stepper motor is fixedly connected to one side of one of the support plates to rotate the lower rotating roller axially. A clearance cavity is provided on the pressure plate to allow one pair of rotating rollers to be positioned.

[0012] Based on the aforementioned scheme, the punching assembly includes a frame fixedly connected to the upper surfaces of two crossbars. A set of fixing blocks are fixedly connected to the inner walls on both sides of the frame. A guide rod is fixedly connected between the two fixing blocks on the same side. A slide is slidably connected to the two guide rods. A punching blade is fixedly connected to one side of the slide. A telescopic cylinder is fixedly connected to the top outer wall of the frame to make the slide slide up and down along the guide rod. One side of the punching blade contacts one side of the pressure plate.

[0013] As a further embodiment of the present invention, the material transfer assembly includes a material discharge port opened on a support frame. A downwardly inclined guide hopper is fixedly connected to one inner wall of the material discharge port, and a guide rod is rotatably connected to the guide hopper. A receiving platform is fixedly connected to the upper surface of the worktable. A stop block that cooperates with the guide hopper is fixedly connected to the upper surface of the receiving platform. Two sets of limiting posts for guiding the metal plate are rotatably connected to the upper surface of the receiving platform and located on one side of the stop block. An electric push rod is fixedly connected to the upper surface of the receiving platform and located on the other side of the stop block. A push plate is fixedly connected to the output end of the electric push rod. Two symmetrical sliding openings are opened on the receiving platform. I-beams for positioning the metal plate are slidably connected in the two sliding openings. An electric push rod is fixedly connected to the lower surface of the receiving platform to make the I-beams slide along the sliding openings. The distance between the stop block and the sliding opening is equal to the width of the metal plate.

[0014] Furthermore, the detection component includes a support platform fixedly connected to the upper surface of the workbench. A support rod is fixedly connected to the upper surface of the workbench and to one side of the support platform. A block is fixedly connected to the support rod. Multiple connecting rods are fixedly connected to one side of the block. A fixed seat is fixedly connected to one end of each connecting rod. A visual inspection camera is fixedly connected to one side of the fixed seat. Two fixed rings are fixedly connected to one side of the support platform. A rotating rod is rotatably connected to the two fixed rings. Two rotating plates are fixedly connected to the outer circumference of the rotating rod. A clearance groove for cooperating with the rotating plates is formed on the upper surface of the support platform. A gear is fixedly connected to one end of the rotating rod. Two mirror-image limiting slide rails are fixedly connected to the upper surface of the support platform. A toothed plate for cooperating with the gear is slidably connected between the two limiting slide rails. An electric telescopic rod for sliding the toothed plate along the limiting slide rails is fixedly connected to the upper surface of the support platform. One side of the support platform contacts one side of the receiving platform and is at the same height.

[0015] Based on the aforementioned scheme, the support assembly includes a frame fixedly connected to the upper surface of the workbench. The top of the frame has a clearance opening. A U-shaped plate is fixedly connected to the top outer wall of the frame. A hydraulic cylinder is fixedly connected to the top outer wall of the U-shaped plate. The output end of the hydraulic cylinder passes through the top inner wall of the U-shaped plate and is fixedly connected to a bracket. A hydraulic cylinder is fixedly connected to one side inner wall of the bracket, and the output end of the hydraulic cylinder passes through one side outer wall of the bracket. A positioning groove for positioning the metal plate is provided on the bottom inner wall of the frame.

[0016] As a further embodiment of the present invention, the edge cutting assembly includes a slide table 1 slidably connected to the upper frame of the first set of support assemblies, a clearance opening 2 on the slide table 1, a clearance opening 3 in the positioning groove of the first set of support assemblies, a connecting platform 1 fixedly connected to the output end of the hydraulic cylinder 2 on the first set of support assemblies, a punching core fixedly connected to the lower surface of the connecting platform 1, the lower end of the punching core sliding within the clearance opening 2, and the shapes of the clearance opening 2 and the clearance opening 3 being the same as the shape of the punching core.

[0017] Furthermore, the shaping component includes a slide table two slidably connected to the frame on the second set of support components. The slide table two has a clearance hole. The positioning groove on the first set of support components has a cavity. The output end of the cylinder two on the first set of support components is fixedly connected to a connecting platform two. The lower surface of the connecting platform two is fixedly connected to a top shaping core. The cavity is fixedly connected to a bottom shaping core.

[0018] Based on the aforementioned scheme, the transverse component includes a linear motor module fixedly connected to the upper surface of the worktable. An L-shaped plate is fixedly connected to the upper surface of the mover of the linear motor module. Multiple electric push rods are fixedly connected to one side of the L-shaped plate. An end plate is fixedly connected to the output end of the multiple electric push rods through one side of the L-shaped plate. A slide plate is fixedly connected to one side of the end plate. One end of the slide plate passes through the L-shaped plate and is slidably connected to it. A miniature cylinder is fixedly connected to one end of the upper surface of the slide plate. The output end of the miniature cylinder passes through the lower surface of the slide plate.

[0019] As a further embodiment of the present invention, the material suction assembly includes a connecting frame fixedly connected to the output end of a micro cylinder on the first set of transverse components. The lower surface of the connecting frame is provided with a plurality of pneumatic suction cups. The material picking assembly includes a connecting seat fixedly connected to the output end of a micro cylinder on the third set of transverse components. The lower surface of the connecting seat is provided with a plurality of electromagnets for suction of the counter-actuated fan blades. The upper surface of the connecting seat is fixedly connected with two sets of limiting slide rods, and each set has a plurality of rods. A slide frame is slidably connected to each of the two sets of limiting slide rods. A spring is fixedly connected between the top of the plurality of limiting slide rods and the upper surface of the slide frame. The lower surfaces of the two slide frames are provided with a plurality of pneumatic suction cups for suction of excess waste material.

[0020] Compared with the prior art, the present invention provides a metal motor heat sink fin stamping device, which has the following beneficial effects:

[0021] 1. This invention, by setting up a leveling component, repeatedly flattens the metal sheet released from the material roll, gradually releasing the internal stress of the material and restoring the flatness of the sheet. This avoids springback, twisting, or cracking caused by stress release during subsequent processing, effectively improving the dimensional accuracy of the product and the precise positioning of the metal sheet during processing.

[0022] 2. By setting up a material transfer component, the present invention can reposition the metal plate after it is cut and falls onto the receiving platform, so as to prevent the metal plate from being skewed during the subsequent pushing process, which would prevent the metal plate from being accurately delivered to the detection component.

[0023] 3. This invention achieves high-speed and precise transfer of metal plates between multiple processes through a coordinated control system of the transverse transfer component and the suction component, eliminating cumulative errors between processes, promoting mutual cooperation between multiple processes, and achieving a high degree of equipment integration, which effectively accelerates the production efficiency of motor cooling fan fins.

[0024] 4. By using the cutting and shaping components together, this invention does not completely remove excess waste material from the edges during cutting. It slightly connects the outer frame with the fan blades that need to be shaped in the middle, which facilitates precise positioning of the fan blades in subsequent processing and avoids defective products due to misalignment.

[0025] 5. By setting up a detection component, the present invention uses a visual inspection camera to inspect the appearance of the metal plate before processing. This can significantly improve the quality control level of the processing through intelligent and non-contact detection technology, and reduce the risk of subsequent processes being affected by defects such as excessive burrs on the edges of the metal plate. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the front three-dimensional structure of a metal motor heat sink stamping device proposed in this invention;

[0027] Figure 2 This is a three-dimensional structural diagram of the rear side of a metal motor heat sink stamping device proposed in this invention.

[0028] Figure 3 This is an enlarged structural diagram of the leveling component of a metal motor heat sink fin stamping device proposed in this invention;

[0029] Figure 4 This is a schematic diagram of the front structure of the leveling component of a metal motor heat sink fin stamping device proposed in this invention;

[0030] Figure 5 This is a schematic diagram of the rear structure of the leveling component of a metal motor heat sink fin stamping device proposed in this invention;

[0031] Figure 6 This is an enlarged structural schematic diagram of the punching component of a metal motor heat sink fin stamping device proposed in this invention;

[0032] Figure 7 This is an enlarged structural diagram of the material transfer component of a metal motor heat sink fin stamping device proposed in this invention;

[0033] Figure 8 This is a schematic diagram of the bottom structure of the material transfer component of a metal motor heat sink fan stamping device proposed in this invention;

[0034] Figure 9 This is an enlarged structural diagram of the detection component of a metal motor heat sink fin stamping device proposed in this invention;

[0035] Figure 10 This is an enlarged structural schematic diagram of the support assembly of a metal motor heat sink fan stamping device proposed in this invention;

[0036] Figure 11 This is an exploded view of the edge-cutting assembly of a metal motor heat sink stamping device proposed in this invention;

[0037] Figure 12 This is an enlarged structural schematic diagram of the forming component of a metal motor heat sink stamping device proposed in this invention;

[0038] Figure 13 This is an enlarged structural schematic diagram of the transverse moving component of a metal motor heat sink stamping device proposed in this invention;

[0039] Figure 14 This is an enlarged structural schematic diagram of the material handling component of a metal motor heat sink fin stamping device proposed in this invention;

[0040] Figure 15 This is a schematic diagram of the bottom structure of the material handling component of a metal motor heat sink fin stamping device proposed in this invention.

[0041] In the diagram: 1. Workbench; 2. Support Frame 1; 3. Leveling Assembly; 301. Crossbar; 302. Support Rod; 303. Top Plate; 304. Bottom Plate; 305. Hydraulic Cylinder; 306. Pressure Plate; 307. Support Plate; 308. Rotating Roller; 309. Stepper Motor; 310. Rubber Sleeve; 311. Pulley 1; 312. Pulley 2; 4. Punching Assembly; 401. Frame; 402. Fixing Block; 403. Guide Rod; 404. Slide 1; 405. Punching Blade; 406. Telescopic Cylinder; 5. Material Transfer Assembly; 01. Material discharge port; 502. Guide hopper; 503. Receiving platform; 504. Stop block; 505. Limiting post; 506. Electric push rod one; 507. Push plate; 508. Sliding mouth; 509. I-beam block; 510. Electric push rod two; 6. Detection assembly; 601. Support platform; 602. Frame rod; 603. Block; 604. Connecting rod; 605. Fixed base; 606. Visual inspection camera; 607. Fixing ring; 608. Rotating rod; 609. Alternating groove; 610. Rotating plate; 611. Gear; 6 12. Limiting slide rail; 613. Toothed plate; 614. Electric telescopic rod; 7. Support assembly; 701. Frame; 702. U-shaped plate; 703. Hydraulic cylinder one; 704. Clearance opening one; 705. Bracket two; 706. Hydraulic cylinder two; 707. Positioning groove; 8. Edge trimming assembly; 801. Slide table one; 802. Connecting table one; 803. Punching core; 804. Clearance opening two; 805. Clearance opening three; 9. Shaping assembly; 901. Slide table two; 902. Connecting table two; 903. Top shaping core; 904. Clearance opening. 905. Hole; 906. Cavity; 10. Bottom shaping core; 10. Horizontal movement assembly; 1001. Linear motor module; 1002. L-shaped plate; 1003. Multi-section electric push rod; 1004. End plate; 1005. Slide plate; 1006. Miniature cylinder; 11. Suction assembly; 1101. Connecting frame; 1102. Pneumatic suction cup one; 12. Picking assembly; 1201. Connecting seat; 1202. Electromagnet; 1203. Limiting slide rod; 1204. Slide two; 1205. Spring; 1206. Pneumatic suction cup two. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0043] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They 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 limiting the invention.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] Please see Figures 1-15As shown, a metal motor cooling fan fin stamping device includes a worktable 1. A support 2 is bolted to the upper surface of the worktable 1. A leveling component 3 for flattening materials is located on the upper surface of the support 2. A punching component 4 for cutting sheet metal to a fixed length is located on the upper surface of the support 2 and at the rear end of the leveling component 3. A detection component 6 for inspecting the punched metal sheet is located on the upper surface of the worktable 1. A material conveying component 5 for conveying the metal sheet is located between the detection component 6 and the support 2. Two support assemblies 7 are located at the top of the worktable 1. Each support assembly 7 contains a cutting component 8 for trimming the metal sheet and a shaping component 9 for stamping and shaping the metal sheet. Three sets of transverse moving components 10 are located at the top of the worktable 1, respectively between the detection component 6 and the cutting component 8, and between the cutting component 9 and the material conveying component 10. Between component 8 and shaping component 9, and in front of shaping component 9, the transverse component 10 is equipped with a suction component 11 for quickly adsorbing and fixing the metal plate, and a picking component 12 for removing the remaining waste and finished fan blades after shaping. In use, the metal coil is first flattened multiple times by leveling component 3, and then cut into metal plates of the same size by punching component 4. Then, the metal plates are sent to inspection component 6 by material transfer component 5 to inspect the burrs and rough edges of the metal plates. Then, the metal plates are cut into the required shape by edge cutting component 8 and shaping component 9 respectively, and the edge-cut metal plates are shaped. Between multiple processes, the metal plates are transferred by two sets of transverse components 10 and suction components 11 on them. After shaping, the shaped fan blades and remaining waste are removed by a third set of transverse components 10 and picking component 12 on them.

[0046] To address the issue of unevenness after the metal coil is unloaded, this invention employs a leveling component 3 during the output process. This component includes two symmetrical crossbars 301 bolted to the upper surface of a support frame 2. Support rods 302 are bolted to the upper surfaces of both crossbars 301. A top plate 303 is bolted to the tops of the support rods 302. A bottom plate 304 is bolted to the upper surface of the support frame 2, positioned between the two crossbars 301. A hydraulic cylinder 305 is bolted to the upper surface of the top plate 303. The output end of the hydraulic cylinder 305 passes through the lower surface of the top plate 303 via a bolt. A pressure plate 306 is fixedly connected. During the feeding process, the pneumatic hydraulic cylinder 305 extends, thereby driving the pressure plate 306 to move downward. After the pressure plate 306 moves downward and comes into close contact with the metal plate, the metal plate can be flattened. Each rotation of the stepper motor 309 will push the metal plate forward a section. Each time the metal plate is flattened, the stepper motor 309 stops running. When the pressure plate 306 releases the metal plate, the stepper motor 309 starts running again. This process is repeated. After one end of the metal plate passes through the second set of rotating rollers 308, it is sent to the rear pressure plate 306 to continue to flatten. Each part of the metal plate is flattened at least three times.

[0047] Specifically, when conveying the metal plate, the upper surfaces of the two crossbars 301 are each bolted with two symmetrical support plates 307. The two opposing support plates 307 are rotatably connected to upper and lower rotating rollers 308 via bearings. Rubber sleeves 310 are adhered to the outer circumference of each of the rotating rollers 308. One end of the lower rotating roller 308 in the two sets passes through the support plate 307 and is bolted to pulley 1 311 and pulley 2 312 respectively. Pulley 1 311 and pulley 2 312 are connected by a belt drive. One side of one of the support plates 307 is bolted to a stepper motor 309 that rotates the lower rotating roller 308 axially. The pressure plate 306 has a mechanism for rotating one pair of rollers. The moving roller 308 has a clearance cavity for avoiding the metal coil. One end of the metal coil passes through the space between the two rotating rollers 308. Then, the stepper motor 309 drives one of the rotating rollers 308 to rotate. As the rubber sleeves 310 on the two rotating rollers 308 compress the metal plate, the upper rotating roller 308 will rotate due to friction during the rotation of the lower rotating roller 308, thereby feeding the metal plate. Through the provided leveling component 3, the metal plate released from the material coil is flattened multiple times to gradually release the internal stress of the material, restore the flatness of the plate, and avoid springback, twisting or cracking caused by stress release during subsequent processing. This effectively improves the dimensional accuracy of the product and the precise positioning of the metal plate during processing.

[0048] To solve the problem of cutting the leveled metal sheet, the present invention employs a punching assembly 4, including a frame 401 bolted to the upper surfaces of two crossbars 301. A set of fixing blocks 402 are bolted to the inner walls of both sides of the frame 401. Guide rods 403 are bolted between the two fixing blocks 402 on the same side. A slide 404 is slidably connected to the two guide rods 403. A punching blade 405 is bolted to one side of the slide 404. A telescopic cylinder 406 is bolted to the top outer wall of the frame 401, which allows the slide 404 to slide up and down along the guide rod 403. One side of the punching blade 405 contacts one side of the pressure plate 306. After a section of the metal plate protrudes from the pressure plate 306, the telescopic cylinder 406 is activated to extend while the front end is flattened, thereby driving the slide 404 to move quickly downward along the guide rod 403, and then punching the protruding metal plate through the punching blade 405 on the slide 404.

[0049] To solve the problem of accurately delivering the cut metal sheet to the detection component 6, the present invention employs a material transfer component 5 including a discharge port 501 opened on the support 2. A downwardly inclined guide hopper 502 is bolted to the inner wall of one side of the discharge port 501. The cut metal sheet falls through the discharge port 501 onto the guide hopper 502, and a guide rod is rotatably connected to the guide hopper 502. A receiving platform 503 is bolted to the upper surface of the worktable 1. The metal sheet continues to slide from the guide rod on the guide hopper 502 onto the upper surface of the receiving platform 503. A stop block 504, which works in conjunction with the guide hopper 502, is bolted to the upper surface of the receiving platform 503. During the material dropping process, the stop block 504 blocks the metal sheet, thereby preventing the metal sheet from slipping off the receiving platform 503. Two sets of limiting posts 505, which guide the metal sheet, are rotatably connected to the upper surface of the receiving platform 503 and located on the side of the stop block 504.

[0050] Specifically, an electric push rod 506 is bolted to the upper surface of the receiving platform 503, located on the other side of the stop block 504. A push plate 507 is bolted to the output end of the electric push rod 506. Two symmetrical sliding openings 508 are provided on the receiving platform 503. I-beams 509, which position the metal plate, are slidably connected within the two sliding openings 508. An electric push rod 510, bolted to the lower surface of the receiving platform 503, allows the I-beams 509 to slide along the sliding openings 508. The distance between the stop block 504 and the sliding openings 508 is equal to the width of the metal plate. After the metal plate slides onto the receiving platform 503, the electric push rod 510 extends, thereby driving the I-beams 509. 9. Slide along the slide 508. After the I-beam 509 slides to one end of the slide 508, the distance between one end of the slide 508 and the stop 504 is equal to the width of the metal plate, so the metal plate can be straightened. After the metal plate is straightened, the electric push rod 506 is activated to extend and push the metal plate forward through the push plate 507 at its output end. When multiple metal plates are pushed simultaneously, the first metal plate will be pushed onto the carrier platform 601 in the detection component 6. The material transfer component 5 can reposition the metal plate after it is cut and falls onto the receiving platform 503 to prevent it from being tilted during subsequent pushing, which would cause the metal plate to be unable to be accurately delivered to the detection component 6.

[0051] To address the issue of potential defects in metal sheets affecting the appearance of the finished product, this invention employs a detection component 6, including a support platform 601 bolted to the upper surface of a workbench 1. A support rod 602 is bolted to the upper surface of the workbench 1 and located to one side of the support platform 601. A block 603 is bolted to the support rod 602. Multiple connecting rods 604 are bolted to one side of the block 603. One end of each connecting rod 604 is bolted to a mounting base 605. A visual inspection camera 606 (model MV-CU060-GM) is bolted to one side of the mounting base 605. The visual inspection camera 606 performs visual inspection of the metal sheet.

[0052] Specifically, one side of the support platform 601 is bolted with two fixing rings 607, and a rotating rod 608 is rotatably connected to the two fixing rings 607. Two rotating plates 610 are bolted to the outer circumference of the rotating rod 608. The upper surface of the support platform 601 has a clearance groove 609 that cooperates with the rotating plate 610. One end of the rotating rod 608 is bolted with a gear 611. The upper surface of the support platform 601 is bolted with two mirror-shaped limiting slide rails 612. A toothed plate 613 that cooperates with the gear 611 is slidably connected between the two limiting slide rails 612. The upper surface of the support platform 601 is bolted with an electric telescopic rod 614 that allows the toothed plate 613 to slide along the limiting slide rails 612. After the metal plate is pushed onto the support platform 601, if the inspection fails, the electric telescopic rod is activated. The rod 614 retracts, thereby pushing the toothed plate 613 to slide along the limiting slide rail 612. While the toothed plate 613 moves, it drives the gear 611 meshing with it to rotate, thereby driving the rotating plate 610 to rotate through the rotating rod 608. The unqualified metal plate is lifted up and conveyed out by the conveyor belt. If the inspection is qualified, the qualified metal plate is sent to the positioning groove 707 on the first set of support assembly 7 through the first set of transverse assembly 10 and the suction assembly 11 on it. The visual inspection camera 606 is set to inspect the appearance of the metal plate before the metal plate is processed by the inspection assembly 6. The quality control level of the processing process can be significantly improved through intelligent and non-contact inspection technology, and the risk of affecting subsequent processes caused by defects such as many burrs on the edge of the metal plate is reduced. One side of the bearing platform 601 is in contact with one side of the receiving platform 503 and the same height.

[0053] In this invention, the support assembly 7 includes a frame 701 fixedly connected to the upper surface of the workbench 1 by bolts. The top of the frame 701 has a first clearance opening 704. A U-shaped plate 702 is fixedly connected to the top outer wall of the frame 701 by bolts. A first hydraulic cylinder 703 is fixedly connected to the top outer wall of the U-shaped plate 702 by bolts. The output end of the first hydraulic cylinder 703 passes through the top inner wall of the U-shaped plate 702 and is fixedly connected to a second bracket 705 by bolts. A second hydraulic cylinder 706 is fixedly connected to one side inner wall of the second bracket 705 by bolts, and the output end of the second hydraulic cylinder 706 passes through one side outer wall of the second bracket 705. A positioning groove 707 for positioning the metal plate is provided on the bottom inner wall of the frame 701.

[0054] To address the issue of convenient metal sheet shaping, this invention employs a cutting assembly 8, including a slide table 801 slidably connected to the upper frame 701 of the first support assembly 7. The slide table 801 has a second clearance opening 804. A third clearance opening 805 is formed within the positioning groove 707 of the first support assembly 7. The output end of the hydraulic cylinder 706 on the first support assembly 7 is bolted to a connecting platform 802. A punching core 803 is bolted to the lower surface of the connecting platform 802. The lower end of the punching core 803 slides within the second clearance opening 804. The shapes of the second clearance opening 804 and the third clearance opening 805 are... Similar in shape to the punching core 803, after the metal plate is fed into the positioning groove 707 on the first set of support components 7, the hydraulic cylinder 703 on it is activated to extend, thereby causing the slide 801 on it to slide down until its lower surface is tightly attached to the upper surface of the metal plate. Then, the hydraulic cylinder 706 is activated to extend quickly, thereby driving the punching core 803 to slide down quickly along the relief opening 804 through the connecting platform 802 at its end, punching the metal plate. The punched waste is pushed out through the relief opening 805. There are two connection points between the fan blades inside the metal plate and the outer frame of the metal plate that are not punched out, so that they are connected.

[0055] To solve the problem of shaping metal sheets, this invention employs a shaping component 9, including a slide table 901 slidably connected to the upper frame 701 of the second set of support components 7. The slide table 901 has a clearance hole 904. A cavity 905 is formed within the positioning groove 707 of the first set of support components 7. The output end of the hydraulic cylinder 706 on the first set of support components 7 is bolted to a connecting platform 902. A top shaping core 903 is bolted to the lower surface of the connecting platform 902, and a bottom shaping core 906 is bolted to the cavity 905. After punching, the punched metal sheet is fed to the second set of support components 7 via the second set of transverse components 10 and the suction component 11. Inside the positioning groove 707, after the slide table 901 presses the metal plate tightly through the support assembly 7, the hydraulic cylinder 706 on it quickly extends and drives the top shaping core 903 at its bottom to move downward through the connecting table 902. It cooperates with the bottom shaping core 906 in the bottom cavity 905 to punch the fan blade in the middle part of the metal plate. During the shaping process, the outer frame of the metal plate will separate from the fan blade. Through the cooperation of the edge cutting assembly 8 and the shaping assembly 9, the excess waste material at the edge is not completely cut off during edge cutting. The outer frame 701 is slightly connected to the fan blade that needs to be shaped in the middle. This makes it convenient to accurately position the fan blade in the subsequent processing and avoids the occurrence of defective products due to placement deviation.

[0056] To solve the problem of transferring metal sheets between multiple processes, this invention employs a transverse transfer assembly 10, including a linear motor module 1001 bolted to the upper surface of a worktable 1. An L-shaped plate 1002 is bolted to the upper surface of the linear motor module 1001's mover. Multiple electric push rods 1003 are bolted to one side of the L-shaped plate 1002. An end plate 1004 is bolted to one side of the output end of the multiple electric push rods 1003, passing through the L-shaped plate 1002. A sliding plate 1005 is bolted to one side of the end plate 1004. One end of the slide plate 1005 passes through and slides through the L-shaped plate 1002. A miniature cylinder 1006 is bolted to one end of the upper surface of the slide plate 1005. The output end of the miniature cylinder 1006 passes through the lower surface of the slide plate 1005. The suction assembly 11 includes a connecting frame 1101 bolted to the output end of the miniature cylinder 1006 on the first set of transverse assembly 10. The lower surface of the connecting frame 1101 is provided with multiple pneumatic suction cups 1102. When the transverse assembly 10 is started, the multi-section electric push rod 1003 is first activated to retract, thereby driving the slide plate through the end plate 1004. 1005 slides until the suction assembly 11 is directly above the metal plate, then the micro cylinder 1006 is activated to extend, thereby driving the pneumatic suction cup 1102 downwards through the connecting frame 1101 until it is in contact with the metal plate. After the pneumatic suction cup 1102 holds the metal plate, the micro cylinder 1006 is activated to retract, driving the metal plate upwards. Then the multi-section electric push rod 1003 is activated to extend. When the metal plate is out of the range of the previous process, the linear motor module 1001 is activated to send the metal plate to the next process. The multi-section electric push rod 1003 is then activated. After shrinking and sending the metal plate to the next process, the micro cylinder 1006 extends the metal plate and places it on the next process. Then, the pneumatic suction cup 1102 is turned off to lower the metal plate. Subsequently, the multi-section electric push rod 1003 and the linear motor module 1001 are activated to return to the initial position and wait for the next operation. Through the coordinated control system of the transverse component 10 and the suction component 11, the high-speed and precise transfer of the metal plate between multiple processes is realized, eliminating the cumulative error between processes. The multiple processes cooperate with each other, the equipment has a high degree of integration, and effectively accelerates the production efficiency of the motor heat sink.

[0057] Furthermore, the material handling assembly 12 includes a connecting seat 1201 bolted to the output end of the micro cylinder 1006 on the third transverse assembly 10. The lower surface of the connecting seat 1201 is provided with multiple electromagnets 1202 for picking up the counter-actuated fan blades. The upper surface of the connecting seat 1201 is bolted to two sets of limiting slide rods 1203, each set containing multiple rods. Each set of limiting slide rods 1203 is slidably connected to a slide frame 1204. Springs 1205 are welded between the tops of the multiple limiting slide rods 1203 and the upper surface of the slide frame 1204. The lower surfaces of the two slide frames 1204 are each provided with multiple pneumatic suction cups 1206 for picking up excess waste material. After processing, the material handling assembly 12 is transported between the shaping assemblies 9 by the third transverse assembly 10, and then extended by the micro cylinder 1006 on the transverse assembly 10, thereby driving the material handling assembly 12. The connecting seat 1201 at the end moves downward. When the pneumatic suction cup 1206 at the bottom of the slide 1204 comes into contact with the metal scrap, the pneumatic suction cup 1206 is activated to hold the scrap. Then, the micro cylinder 1006 is activated to extend the slide. The spring 1205 is compressed. At this time, the connecting seat 1201 continues to move downward until the electromagnet 1202 at its bottom comes into contact with the formed fan blade. The electromagnet 1202 is activated to hold the metal fan blade. Then, the material picking component 12 is moved to move away from the shaping component 9 and to one side by the transverse component 10. After passing the first conveyor belt, the pneumatic suction cup 1206 is disconnected and the scrap is put down and conveyed out by the first conveyor belt. When passing the second conveyor belt, the electromagnet 1202 is disconnected and the formed fan blade is put down and sent out by the second conveyor belt. Then, the transverse component 10 and the material picking component 12 are activated to return to the initial position.

[0058] It should be noted that the stepper motor 309, hydraulic cylinder 305, telescopic cylinder 406, oil cylinder one 703, oil cylinder two 706, electric telescopic rod 614, visual inspection camera 606, linear motor module 1001, multi-section electric push rod 1003, miniature cylinder 1006, pneumatic suction cup one 1102, pneumatic suction cup two 1206 and electromagnet 1202 are all existing technologies. Those skilled in the art can set them according to actual needs, and they will not be described in detail here.

[0059] It should be noted that: cylinder 703, cylinder 706 and hydraulic cylinder 305 are actuators in the hydraulic system, which realize the extension and retraction function by cooperating with the hydraulic system. Those skilled in the art can set them according to actual needs, which will not be elaborated here.

[0060] The present invention is used in the following steps:

[0061] S1: In use, first pass one end of the metal coil through the two rotating rollers 308. Then drive the stepper motor 309 to rotate one of the rotating rollers 308. As the rubber sleeves 310 on the two rotating rollers 308 squeeze the metal plate, the upper rotating roller 308 will rotate due to friction during the rotation of the lower rotating roller 308, thus feeding the metal plate. During the feeding process, the hydraulic cylinder 305 is activated to extend, thereby driving the pressure plate 306 to move downward. After the pressure plate 306 moves downward and comes into close contact with the metal plate, the metal plate can be flattened. Each rotation of the stepper motor 309 will feed the metal plate forward a section. Each time the metal plate is flattened, the stepper motor 309 stops running. When the pressure plate 306 releases the metal plate, the stepper motor 309 starts running again. This process is repeated. After one end of the metal plate passes through the second set of rotating rollers 308, it is sent to the pressure plate 306 at the rear end to continue to flatten. Each part of the metal plate is flattened at least three times.

[0062] S2: After the metal plate protrudes from the pressure plate 306, the telescopic cylinder 406 is activated to extend while the front end is flattened, thereby driving the slide 404 to move quickly downward along the guide rod 403, and then punching the protruding metal plate through the punching blade 405 on the slide 404.

[0063] S3: The punched metal plate falls from the discharge port 501 onto the guide hopper 502. The metal plate continues to slide from the guide rod on the guide hopper 502 onto the upper surface of the receiving platform 503. During the contact process, the stop block 504 blocks the metal plate, thus preventing the metal plate from slipping off the receiving platform 503. After the metal plate slides onto the receiving platform 503, the electric push rod 2 510 is activated to extend, thereby driving the I-beam block 509 to slide along the sliding opening 508. After the I-beam block 509 slides to one end of the sliding opening 508, since the distance between one end of the sliding opening 508 and the stop block 504 is equal to the width of the metal plate, the metal plate can be straightened. After the metal plate is straightened, the electric push rod 1 506 is activated to extend, thereby pushing the metal plate forward through the push plate 507 at its output end. When multiple metal plates are pushed simultaneously, the first metal plate will be pushed onto the carrier platform 601 in the detection component 6.

[0064] S4: After the metal plate is pushed onto the support platform 601, the metal plate is inspected by the visual inspection camera 606. If the inspection fails, the electric telescopic rod 614 is activated to retract and push the toothed plate 613 to slide along the limit slide rail 612. While the toothed plate 613 moves, it will drive the gear 611 meshing with it to rotate, thereby driving the rotating plate 610 to rotate through the rotating rod 608, lifting the unqualified metal plate and conveying it out by the conveyor belt. If the inspection passes, the qualified metal plate is sent to the positioning groove 707 on the first set of support components 7 through the first set of transverse components 10 and the suction components 11 thereon.

[0065] S5: After the metal plate is sent into the positioning groove 707 on the first set of support assembly 7, the hydraulic cylinder 703 on it is activated to extend, so that the slide 801 on it slides down until its lower surface is in close contact with the upper surface of the metal plate. Then, the hydraulic cylinder 706 is activated to extend quickly, so that the punching core 803 is driven to slide down quickly along the relief opening 804 through the connecting platform 802 at its end to punch the metal plate. The punched waste is pushed out through the relief opening 805. There are two connection points between the fan blade inside the metal plate and the outer frame of the metal plate that are not punched out, so that they are connected.

[0066] S6: After punching, the punched metal plate is sent to the positioning groove 707 on the second support assembly 7 by the second set of transverse components 10 and suction components 11. After the support assembly 7 presses the metal plate with the slide table 901, the hydraulic cylinder 706 on it quickly extends and drives the top shaping core 903 at the bottom of the connecting table 902 to move downward. The top shaping core 903 at the bottom of the metal plate moves downward through the connection table 902 and cooperates with the bottom shaping core 906 in the bottom cavity 905 to punch the fan blade in the middle part of the metal plate. During the shaping process, the outer frame of the metal plate will separate from the fan blade.

[0067] S7: When starting the transverse component 10, first activate the multi-section electric push rod 1003 to retract, thereby driving the slide plate 1005 to slide through the end plate 1004 until the suction component 11 on it is directly above the metal plate. Then, activate the micro cylinder 1006 to extend, thereby driving the pneumatic suction cup 1102 to move downward through the connecting frame 1101 until it is in contact with the metal plate. After that, activate the pneumatic suction cup 1102 to hold the metal plate, then activate the micro cylinder 1006 to retract, driving the metal plate upward, and then start... The multi-section electric push rod 1003 extends. After the metal plate leaves the range of the previous process, the linear motor module 1001 is started to send the metal plate to the next process. The multi-section electric push rod 1003 is then started to retract and send the metal plate to the next process. After that, the micro cylinder 1006 extends and places the metal plate on it. Then, the pneumatic suction cup 1102 is closed to put the metal plate down. Then, the multi-section electric push rod 1003 and the linear motor module 1001 are started to return to the initial position and wait for the next operation.

[0068] S8: After processing, the material handling component 12 is sent to the shaping component 9 via the third set of transverse components 10. Then, the micro cylinder 1006 on the transverse component 10 extends, thereby driving the connecting seat 1201 at its end to move downward. When the pneumatic suction cup 1206 at the bottom of the slide 1204 comes into contact with the metal scrap, the pneumatic suction cup 1206 is activated to suck up the scrap. Then, the micro cylinder 1006 continues to extend, the spring 1205 is compressed, and at this time, the connecting seat 1201 continues to move downward until its bottom. When the electromagnet 1202 of the part contacts the formed fan blade, the electromagnet 1202 is activated to attract the metal fan blade. Then, the material picking component 12 is moved to one side away from the forming component 9 by the transverse component 10. After passing the first conveyor belt, the pneumatic suction cup 1206 is disconnected and the waste material is put down and conveyed out by the first conveyor belt. When passing the second conveyor belt, the electromagnet 1202 is disconnected and the formed fan blade is put down and sent out by the second conveyor belt. Then, the transverse component 10 and the material picking component 12 are activated to return to the initial position.

[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A metal motor heat sink fin stamping device, comprising a worktable, characterized in that, A support frame is fixedly connected to the upper surface of the workbench. A leveling component for flattening materials is provided on the upper surface of the support frame. A punching component for cutting sheet metal to a fixed length is provided on the upper surface of the support frame and at the rear end of the leveling component. A detection component for detecting the punched metal sheet is provided on the upper surface of the workbench. A material transfer component for accurately conveying the metal sheet is provided between the detection component and the support frame. Two support components are provided on the top of the workbench. A cutting component for cutting the metal sheet and a forming component for stamping and shaping the metal sheet are respectively provided in the two support components. Three sets of transverse moving components are provided on the top of the workbench. The three sets of transverse moving components are located between the detection component and the cutting component, between the cutting component and the forming component, and in front of the forming component. A suction component for quickly adsorbing and fixing the metal sheet and a material picking component for removing the remaining waste and finished fan blades after shaping are provided on the transverse moving components. The support assembly includes a frame fixedly connected to the surface of the workbench. A clearance opening is provided at the top of the frame. A U-shaped plate is fixedly connected to the top outer wall of the frame. A hydraulic cylinder is fixedly connected to the top outer wall of the U-shaped plate. A bracket is fixedly connected to the output end of the hydraulic cylinder through the top inner wall of the U-shaped plate. A hydraulic cylinder is fixedly connected to one side inner wall of the bracket, and the output end of the hydraulic cylinder passes through one side outer wall of the bracket. A positioning groove for positioning a metal plate is provided on the bottom inner wall of the frame. The edge trimming assembly includes a slide table 1 slidably connected to the upper frame of the first set of support assemblies, a clearance opening 2 on the slide table 1, a clearance opening 3 in the positioning groove of the first set of support assemblies, a connecting platform 1 fixedly connected to the output end of the hydraulic cylinder 2 on the first set of support assemblies, a punching core fixedly connected to the lower surface of the connecting platform 1, the lower end of the punching core sliding in the clearance opening 2, and the shapes of the clearance opening 2 and the clearance opening 3 are the same as the shape of the punching core. The shaping component includes a slide table 2 that is slidably connected to the upper frame of the second support assembly. The slide table 2 has a clearance hole. A cavity is formed in the positioning groove of the second support assembly. A connecting platform 2 is fixedly connected to the output end of the hydraulic cylinder 2 on the second support assembly. A top shaping core is fixedly connected to the lower surface of the connecting platform 2. A bottom shaping core is fixedly connected to the cavity. The transverse component includes a linear motor module fixedly connected to the upper surface of the worktable. An L-shaped plate is fixedly connected to the upper surface of the linear motor module mover. Multiple electric push rods are fixedly connected to one side of the L-shaped plate. An end plate is fixedly connected to the output end of the multiple electric push rods through one side of the L-shaped plate. A slide plate is fixedly connected to one side of the end plate. One end of the slide plate passes through the L-shaped plate and is slidably connected to it. A miniature cylinder is fixedly connected to one end of the upper surface of the slide plate. The output end of the miniature cylinder passes through the lower surface of the slide plate. The material suction assembly includes a connecting frame fixedly connected to the output end of a miniature cylinder on the first set of transverse components. The lower surface of the connecting frame is provided with multiple pneumatic suction cups. The material handling assembly includes a connecting seat fixedly connected to the output end of a miniature cylinder on the third set of transverse components. The lower surface of the connecting seat is provided with multiple electromagnets for suctioning the shaped fan blades. The upper surface of the connecting seat is fixedly connected with two sets of limiting slide rods, and each set has multiple rods. Each of the two sets of limiting slide rods is slidably connected with a slide frame. The top of each of the multiple limiting slide rods is fixedly connected to the upper surface of the slide frame. The lower surface of each of the two slide frames is provided with multiple pneumatic suction cups for suctioning the remaining waste material.

2. The metal motor heat sink stamping device according to claim 1, characterized in that, The leveling assembly includes two symmetrical crossbars fixedly connected to the upper surface of a support frame. Support rods are fixedly connected to the upper surfaces of both crossbars. Top plates are fixedly connected to the top ends of multiple support rods. A bottom plate is fixedly connected to the upper surface of the support frame between the two crossbars. A hydraulic cylinder is fixedly connected to the upper surface of the top plate. A pressure plate is fixedly connected to the output end of the hydraulic cylinder through the lower surface of the top plate. Two symmetrical support plates are fixedly connected to the upper surfaces of both crossbars. Two upper and lower rotating rollers are rotatably connected between the two opposing support plates via bearings. Rubber sleeves are adhered to the outer circumference of multiple rotating rollers. One end of the lower rotating roller in the two sets passes through the support plate and is fixedly connected to pulley one and pulley two via bolts. Pulley one and pulley two are connected by belt drive. A stepper motor that causes the lower rotating roller to rotate axially is fixedly connected to one side of one of the support plates. A clearance cavity is opened on the pressure plate to avoid the movement of one pair of rotating rollers.

3. The metal motor heat sink stamping device according to claim 2, characterized in that, The punching assembly includes a frame fixedly connected to the upper surface of two crossbars. A set of fixing blocks are fixedly connected to the inner walls of both sides of the frame. A guide rod is fixedly connected between the two fixing blocks on the same side. A slide is slidably connected to the two guide rods. A punching blade is fixedly connected to one side of the slide. A telescopic cylinder is fixedly connected to the top outer wall of the frame to make the slide slide up and down along the guide rod. One side of the punching blade contacts one side of the pressure plate.

4. The metal motor heat sink stamping device according to claim 2, characterized in that, The material transfer assembly includes a material discharge port on a support frame. A downwardly inclined guide hopper is fixedly connected to the inner wall of one side of the material discharge port, and a guide rod is rotatably connected to the guide hopper. A receiving platform is fixedly connected to the upper surface of the worktable. A stop block that works with the guide hopper is fixedly connected to the upper surface of the receiving platform. Two sets of limiting posts that guide the metal plate are rotatably connected to the upper surface of the receiving platform and to one side of the stop block. An electric push rod is fixedly connected to the upper surface of the receiving platform and to the other side of the stop block. A push plate is fixedly connected to the output end of the electric push rod. Two symmetrical sliding openings are provided on the receiving platform. I-beams that position the metal plate are slidably connected in the two sliding openings. An electric push rod is fixedly connected to the lower surface of the receiving platform to make the I-beams slide along the sliding openings. The distance between the stop block and the sliding opening is equal to the width of the metal plate.

5. The metal motor heat sink stamping device according to claim 4, characterized in that, The inspection assembly includes a support platform fixedly connected to the upper surface of a workbench. A support rod is fixedly connected to the upper surface of the workbench and to one side of the support platform. A block is fixedly connected to the support rod. Multiple connecting rods are fixedly connected to one side of the block. A fixed seat is fixedly connected to one end of each connecting rod. A visual inspection camera is fixedly connected to one side of the fixed seat. Two fixed rings are fixedly connected to one side of the support platform. A rotating rod is rotatably connected to the two fixed rings. Two rotating plates are fixedly connected to the outer circumference of the rotating rod. A clearance groove for cooperating with the rotating plates is opened on the upper surface of the support platform. A gear is fixedly connected to one end of the rotating rod. Two mirror-image limiting slide rails are fixedly connected to the upper surface of the support platform. A toothed plate for cooperating with the gear is slidably connected between the two limiting slide rails. An electric telescopic rod for sliding the toothed plate along the limiting slide rails is fixedly connected to the upper surface of the support platform. One side of the support platform contacts one side of the receiving platform and is at the same height.

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