Auto parts die casting equipment

Abstract

The present application relates to a die-casting equipment for automobile parts, belonging to the field of automobile parts manufacturing, including a frame, a support frame fixedly connected to the frame, an upper mold assembly provided on the support frame, a lower mold assembly provided on the frame below the support frame, and a workbench rotatably connected to the frame; a furnace is provided on the frame, a discharge port is provided at the bottom of the furnace, a loading tray is rotatably connected to the frame, a plurality of storage boxes are provided on the loading tray, and a control device for controlling the opening and closing of the feeding port of the storage box is provided on the loading tray. The molten aluminum liquid in the furnace can be first added to the storage box, and the volume of the storage box is designed according to the requirements of the lower mold assembly, so that the amount of aluminum liquid added from the storage box to the lower mold plate is precisely controlled, thereby realizing the quantitative addition of aluminum liquid, without the need for manual feeding operation, which not only improves the feeding efficiency, but also can realize the precise control of the amount of aluminum liquid and ensure product quality.

Description

Technical Field

[0001] The present application relates to the field of automobile parts manufacturing, and in particular to an automobile parts die-casting device. Background Art

[0002] Die casting is a widely used process in metal casting. Its basic principle is to use the inner cavity of the mold to apply high pressure to the molten metal to make it solidify and form. This process occupies an important position in the manufacturing industry and is particularly suitable for mass production of small and medium-sized castings. In the existing die-casting technology, most die-casting castings do not contain iron, such as zinc, copper, aluminum and other metals and their alloys. These materials have good fluidity and formability during the die-casting process.

[0003] With the rapid development of the automobile manufacturing industry, higher requirements are placed on the manufacturing process of automobile parts. Die casting, as an efficient and precise molding process, is widely used in the manufacturing process of automobile parts. The traditional automobile die-casting mold is relatively simple in structure, usually consisting of an upper mold and a lower mold, and the die-casting process is completed by closing and opening the mold.

[0004] However, in actual operation, the operator is required to manually scoop the molten metal material from the furnace, pour it into the lower mold, and then perform the mold closing operation. The manual loading method not only has low loading efficiency, but also the amount of raw materials added each time is uncontrollable, which also has a certain impact on the molding quality of the final product. Summary of the invention

[0005] In order to improve the feeding efficiency and the final product quality, the present application provides a die-casting equipment for automobile parts.

[0006] The present application provides an automobile parts die-casting equipment that adopts the following technical scheme: it comprises a frame, a supporting frame is fixedly connected to the frame, an upper mold assembly is arranged on the supporting frame, a lower mold assembly is arranged on the frame below the supporting frame and corresponding to the upper mold assembly, a workbench is rotatably connected to the frame, and the lower mold assemblies are several and arranged in a circular array around the rotation axis of the workbench; a furnace is arranged on the frame, a discharge port is arranged at the bottom of the furnace, a loading tray is arranged on the frame between the furnace and the workbench, the loading tray is rotatably connected to the frame, the discharge port of the furnace abuts against the loading tray, a plurality of material storage boxes are arranged on the loading tray in a circular array around the rotation axis of the loading tray, the material storage box is provided with an opening at the top and a feeding port at the bottom, and after the loading tray rotates, the opening of the material storage box can be aligned with the discharge port, and a control device for controlling the opening and closing of the feeding port of the material storage box is provided on the loading tray.

[0007] By adopting the above technical solution, the molten aluminum liquid in the furnace can be first added to the storage box. The volume of the storage box is designed according to the requirements of the lower mold assembly. In this way, the amount of aluminum liquid added from the storage box to the lower mold plate is precisely controlled, thereby realizing quantitative addition of aluminum liquid without manual feeding operations. This not only improves the feeding efficiency, but also realizes precise control of the amount of aluminum liquid to ensure product quality.

[0008] Preferably, the control device includes a baffle plate arranged below the feeding port, and when the material storage box rotates to above the lower mold assembly, the control assembly arranged on the loading tray drives the baffle plate to move to open the feeding port.

[0009] By adopting the above technical solution, under normal conditions, the baffle plate is located below the feeding port to close the feeding port to prevent the molten aluminum from flowing out of the storage box during the movement of the storage box. When the storage box rotates to above the lower mold assembly, the baffle plate is driven to slide by the control assembly to open the feeding port. At this time, the molten aluminum can flow out of the storage box into the lower mold assembly.

[0010] Preferably, the baffle plate is radially slidably arranged on the loading tray, and an elastic member is provided on the loading tray to drive the baffle plate to slide below the feeding port. Side plates are fixedly connected on both sides of the baffle plate, and a sliding block is provided at one end of the side plate away from the baffle plate, and a sliding groove cooperating with the sliding block is provided at the bottom of the loading tray.

[0011] By adopting the above technical solution, with the cooperation of the side plate and the slider, a sliding connection between the material baffle plate and the loading tray can be achieved. Under the action of the elastic member, the material baffle plate can always remain below the material storage box without being subject to other external forces, thereby stably achieving the closure of the feeding port at the bottom of the material storage box.

[0012] Preferably, the control assembly includes a connecting plate arranged at the bottom of the loading tray, the connecting plate is fixedly connected to the slider, a control groove is provided at the bottom of the connecting plate, a first column is provided on the workbench which can be rotated into the control groove and abut against the side wall of the control groove, the side surface of the control groove abutting against the first column is a guide surface, and the first column is arranged corresponding to the lower mold assembly.

[0013] By adopting the above technical solution, when the lower mold assembly rotates to the bottom of the material storage box, the first column enters the control groove and abuts against the guide surface. Under the push of the first column, the connecting plate is driven to slide toward the rotating shaft of the loading disk, thereby driving the baffle plate away from the feeding port. At this time, the feeding port can be in an open state. By setting the connecting plate and the guide surface, the feeding port can be automatically opened when the material storage box is in place.

[0014] Preferably, a bottom plate is provided at the bottom of the material storage box, the feeding port is arranged through the bottom plate, a control ring is sleeved on the bottom of the material storage box, the material baffle plate is fixedly arranged at the bottom of the control ring, a switch hole is arranged on the material baffle plate corresponding to the feeding port, and a torsion spring is connected to the control ring to drive the control ring to rotate so as to stagger the feeding port and the switch hole. The control assembly includes a shift rod, one end of which is fixedly connected to the control ring, and a second column is arranged on the workbench which can abut against the shift rod after the loading tray is rotated, and the second column is arranged corresponding to the lower mold assembly.

[0015] By adopting the above technical solution, when the lower mold assembly rotates to the bottom of the material storage box, the second column abuts against the lever, and the second column drives the lever and the control ring to rotate to align the feeding port with the switch hole. At this time, the feeding port can also be opened.

[0016] Preferably, a switch valve for controlling the opening and closing of the discharge port is provided at the bottom of the furnace, and when the opening of the material storage box is rotated to below the discharge port, the switch valve is in an open state.

[0017] By adopting the above technical solution, the switch valve can realize the opening and closing of the discharge port, thereby preventing the aluminum liquid from flowing out from between the discharge port and the loading tray during the rotation of the loading tray, thereby causing waste of raw materials.

[0018] Preferably, the switch valve comprises a control rod rotatably arranged at the bottom of the melting furnace, the control rod is provided with a control hole for the aluminum liquid to flow out, and the frame is provided with a first servo motor that drives the control rod to rotate.

[0019] By adopting the above technical solution, the first servo motor drives the control rod to rotate, and the discharge port can be opened and closed by adjusting the position of the control hole.

[0020] Preferably, a moving contact is embedded on the outer circumferential surface of the loading tray, and the moving contact is arranged corresponding to the material storage box. A static contact is provided at the bottom of the furnace. When the opening of the material storage box rotates to below the discharge port, the moving contact contacts the static contact, and the first servo motor drives the control rod to rotate to open the discharge port.

[0021] By adopting the above technical solution, when the material storage box rotates to the bottom of the furnace, the moving contact contacts the static contact, and the first servo motor can drive the control rod to rotate. The automatic control of the control rod can be achieved through the position of the material storage box.

[0022] Preferably, a driving member for driving the workbench to rotate is provided on the frame, a driving gear is provided on the rotating shaft of the workbench, and a passive gear meshing with the driving gear is fixedly connected to the rotating shaft of the workbench.

[0023] By adopting the above technical solution, only one second servo motor is needed to drive the workbench and the loading tray to rotate synchronously at the same time, and the storage box on the loading tray can be aligned with the lower template on the workbench in sequence.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] The storage box can realize the quantitative storage of aluminum liquid, and then realize the quantitative discharge of aluminum liquid, effectively improving the product quality of automotive parts;

[0026] With the cooperation of the second servo motor and the control component, the feeding port can be automatically opened and closed, thereby realizing automatic feeding of molten aluminum and greatly improving the feeding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0028] Figure 2 It is a side view of the first embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of the bottom structure of the loading tray of Example 1 of the present application.

[0030] Figure 4 It is a schematic diagram of the switch valve structure of Example 1 of the present application.

[0031] Figure 5 It is a schematic diagram of the control component structure of Example 2 of the present application.

[0032] Figure 6 This is a schematic diagram of the control ring installation of Example 2 of the present application.

[0033] Description of the accompanying drawings: 1, frame; 11, support frame; 12, second servo motor; 2, oil cylinder; 21, upper template; 3, workbench; 31, lower template; 32, driving gear; 33, first column; 34, second column; 4, furnace; 41, discharge pipe; 42, discharge port; 5, loading tray; 51, storage box; 511, bottom plate; 512, limit block; 52, feeding port; 53, opening; 5 4. Moving contact; 55. Passive gear; 6. Control device; 61. Material stop plate; 611. Switch hole; 62. Side plate; 621. Slider; 63. Connecting plate; 631. Control groove; 632. Guide surface; 65. Spring; 7. Switch valve; 71. Control rod; 711. Control hole; 72. First servo motor; 8. Static contact; 9. Control ring; 91. Torsion spring; 92. Push rod; 93. Waist-shaped groove. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-Figure 6This application is described in further detail.

[0035] Embodiment 1: This embodiment of the present application discloses a die-casting device for automobile parts. Figure 1 A die-casting device for automobile parts includes a frame 1, a support frame 11 is fixedly connected above the frame 1, an upper die assembly is arranged on the top of the support frame 11, the upper die assembly includes a cylinder 2 fixedly connected to the frame 1, the cylinder 2 is vertically arranged, an upper die plate 21 is connected to the piston rod of the cylinder 2, a workbench 3 is rotatably connected to the frame 1, the workbench 3 is circular and horizontally placed, and the workbench 3 is arranged below the upper die assembly. There are several lower die assemblies arranged in a circular array around the rotation axis of the workbench 3. In this embodiment, there are four lower die assemblies, and the lower die assembly includes a lower die plate 31 matched with the upper die plate 21. The lower die plate 31 is fixedly arranged on the surface of the workbench 3. After rotating the workbench 3, the four lower die plates 31 can be rotated to the bottom of the upper die plate 21 in sequence. At this time, the cylinder 2 drives the upper die plate 21 to move down and abut against the lower die plate 31, and the mold closing operation can be completed.

[0036] Reference Figure 1 as well as Figure 2 A loading tray 5 is rotatably connected to one side of the workbench 3 on the frame 1. The loading tray 5 is circular and has an outer diameter equal to that of the workbench 3. The loading tray 5 is arranged above the workbench 3 and partially overlaps with the workbench 3 in the vertical direction. A melting furnace 4 is fixedly connected to the loading tray 5 on the frame 1. A discharge port 42 is arranged at the bottom of the melting furnace 4. A material storage box 51 is arranged on the loading tray 5 corresponding to the lower template 31. The material storage boxes 51 are arranged in a circular array around the rotation axis of the loading tray 5. The storage box 51 is fixedly arranged on the bottom surface of the loading tray 5, the top of the storage box 51 is provided with an opening 53 and the bottom is provided with a feeding port 52. After the loading tray 5 is rotated, the opening 53 of the storage box 51 can be rotated to be aligned with the discharge port 42, and the molten aluminum liquid in the melting furnace 4 enters the storage box 51 through the discharge port 42. Then the loading tray 5 is rotated again, and the storage box 51 with the aluminum liquid is rotated to the top of the lower template 31, and the aluminum liquid in the storage box 51 can be poured into the lower template 31 through the feeding port 52.

[0037] Reference Figure 2 as well as Figure 3 In order to facilitate the control of the aluminum liquid feeding process, a control device 6 for controlling the opening and closing of the feeding port 52 of the storage box 51 is provided on the feeding tray 5. The control device 6 includes a baffle plate 61 arranged below the feeding port 52. The baffle plate 61 can close the feeding port 52 to prevent the aluminum liquid from flowing out of the feeding port 52 when the feeding tray 5 rotates. A control component for driving the baffle plate 61 to move is provided at the bottom of the feeding tray 5. When the feeding port 52 rotates to the top of the lower template 31, the control component controls the baffle plate 61 to move, and the feeding port 52 is in an open state. At this time, the aluminum liquid in the storage box 51 can flow into the lower template 31.

[0038] In order to prevent the aluminum liquid from cooling and solidifying in the storage box 51 after entering the storage box 51 from the melting furnace 4, a heating wire is embedded on the inner wall of the storage box 51. The heating wire can continuously heat the aluminum liquid in the storage box 51 to ensure that the aluminum liquid in the storage box 51 is always in a molten state.

[0039] When the spring 65 is at its original length, the baffle plate 61 slides to the bottom of the material storage box 51 and completely covers the feeding port 52.

[0040] To facilitate the sliding control of the baffle plate 61, a control component for controlling the sliding of the baffle plate 61 is also provided on the loading tray 5. When the feeding port 52 rotates to above the lower mold assembly, the control component drives the baffle plate 61 to slide to the outside of the material storage box 51, thereby opening the feeding port 52.

[0041] In this embodiment, the control assembly includes a connecting plate 63, which is arranged below the loading tray 5. The two ends of the connecting plate 63 are respectively fixed to the bottom surfaces of the sliders 621 located on both sides of the material storage box 51. A control groove 631 is provided at the bottom of the connecting plate 63. The first column 33 is fixedly connected to the workbench 3. The first column 33 is arranged corresponding to the lower template 31. The two ends of the control groove 631 extend to the outside of the connecting plate 63, so that the first column 33 can enter and move out of the control groove 631. The side where the control groove 631 abuts against the first column 33 is a guide surface 632, which is arranged in a wave shape and convex in the middle. When the lower template 31 rotates to the bottom of the feeding port 52, the first column 33 enters the control groove 631 and abuts against the guide surface 632. Then, the workbench 3 continues to rotate. When the lower template 31 rotates to the right below the feeding port 52, the first column 33 abuts against the highest point of the guide surface 632, and the feeding port 52 is fully opened.

[0042] Reference Figure 2 as well as Figure 4In order to prevent the aluminum liquid from flowing out of the discharge port 42 and dripping onto the loading tray 5 during the rotation of the loading tray 5, a discharge pipe 41 is provided at the bottom of the melting furnace 4. The top of the discharge pipe 41 is communicated with the melting furnace 4. The discharge port 42 is arranged at the bottom of the discharge pipe 41. The bottom of the discharge pipe 41 is in contact with the loading tray 5. During normal rotation, the discharge port 42 is in a closed state. When the opening 53 at the top of the storage box 51 rotates to below the discharge port 42, the aluminum liquid can flow into the storage box 51.

[0043] In addition, a switch valve 7 is provided in the discharge pipe 41 for controlling the opening and closing of the discharge port 42. When the opening 53 of the storage box 51 rotates to below the discharge port 42, the switch valve 7 opens. The switch valve 7 includes a control rod 71 rotatably arranged in the discharge pipe 41. The control rod 71 is perpendicular to the discharge pipe 41. A control hole 711 for aluminum liquid to flow out is provided on the control rod 71. A first servo motor 72 for driving the control rod 71 to rotate is provided on the frame 1. One end of the control rod 71 extends out of the discharge pipe 41 and is connected to the output shaft of the first servo motor 72. After the first servo motor 72 drives the control rod 71 to rotate, when the control hole 711 coincides with the axis of the discharge pipe 41, the discharge pipe 41 is opened, and when the control hole 711 is perpendicular to the axis of the discharge pipe 41, the discharge pipe 41 is closed.

[0044] To facilitate the control of the first servo motor 72, a moving contact 54 is embedded on the outer peripheral surface of the loading tray 5, and the moving contact 54 is arranged corresponding to the storage box 51. A static contact 8 is provided on the frame 1 at the bottom of the melting furnace 4. The moving contact 54, the static contact 8 and the first servo motor 72 are electrically connected. When the opening 53 of the storage box 51 rotates to below the discharge port 42, the moving contact 54 contacts the static contact 8, and the first servo motor 72 drives the control rod 71 to rotate until the control hole 711 coincides with the axis of the discharge pipe 41. After the feeding is completed, the loading tray 5 rotates, the moving contact 54 separates from the static contact 8, and the first servo motor 72 drives the control rod 71 to reverse until the control hole 711 is perpendicular to the axis of the discharge pipe 41.

[0045] To facilitate the driving of the workbench 3 and the loading tray 5 to rotate, a driving member for driving the workbench 3 to rotate is fixedly connected to the frame 1, and the driving member is a second servo motor 12. The second servo motor 12 is fixedly arranged on the frame 1, and the output shaft of the second servo motor 12 is connected to the rotating shaft of the workbench 3, and a driving gear 32 is fixedly connected to the rotating shaft of the workbench 3. A passive gear 55 meshing with the driving gear 32 is fixedly connected to the rotating shaft of the loading tray 5. The parameters of the driving gear 32 and the passive gear 55 are equal. In this way, only one second servo motor 12 is needed to drive the workbench 3 and the loading tray 5 to rotate synchronously at the same time, and the material storage box 51 on the loading tray 5 can be aligned with the lower template 31 on the workbench 3 in sequence.

[0046] The implementation principle of an automobile parts die-casting equipment in an embodiment of the present application is as follows: during the die-casting operation, an aluminum ingot is first added into the furnace 4. After it is melted into aluminum liquid, the second servo motor 12 rotates, driving the workbench 3 and the loading tray 5 to rotate. When the opening 53 at the top of the storage box 51 rotates to below the discharge port 42, the moving contact 54 contacts the static contact 8, and the first servo motor 72 drives the control rod 71 to rotate, and the aluminum liquid flows into the storage box 51 from the discharge port 42. After the aluminum liquid in the storage box 51 is full, the second servo motor 12 continues to rotate 90° to move the storage box 51 containing the aluminum liquid to above the lower template 31. At this time, the first column 33 enters the control groove 631, and the baffle plate 61 moves out from the bottom of the storage box 51. The aluminum liquid flows from the feeding port 52 to the lower template 31, thereby realizing accurate feeding of the aluminum liquid and improving product precision.

[0047] Example 2: Reference Figure 5 as well as Figure 6 , which is different from the first embodiment, is that the control component structure is different. The bottom of the storage box 51 in the second embodiment is provided with a bottom plate 511, and the feeding port 52 is arranged through the bottom plate 511. In this embodiment, there are four feeding ports 52, which are arranged in a circular array on the bottom plate 511. The feeding port 52 is arranged in a circular shape. A control ring 9 is sleeved on the bottom of the storage box 51, and the control ring 9 is rotatably connected to the storage box 51. A baffle plate 61 is fixedly arranged at the bottom of the control ring 9, and the baffle plate 61 is arranged in contact with the bottom plate 511. A switch hole 611 is arranged on the baffle plate 61 corresponding to the feeding port 52. When the switch hole 611 is aligned with the feeding port 52, the aluminum liquid can flow out of the storage box 51 into the lower template 31. When the switch hole 611 is staggered with the feeding port 52, the aluminum liquid is enclosed in the storage box 51.

[0048] A torsion spring 91 is connected to the control ring 9, and the torsion spring 91 is sleeved on the outside of the material storage box 51. One end of the torsion spring 91 is fixed to the material storage box 51, and the other end is fixed to the control ring 9. The torsion spring 91 drives the control ring 9 to rotate. In order to facilitate limiting the rotation angle of the control ring 9, a waist-shaped groove 93 is provided on the control ring 9, and a limit block 512 that cooperates with the waist-shaped groove 93 is provided on the outer wall of the material storage box 51. Under normal circumstances, the limit block 512 abuts against one end of the waist-shaped groove 93. At this time, the switch hole 611 and the feeding port 52 are in a staggered state.

[0049] In this embodiment, the control assembly includes a lever 92, which is radially arranged along the control ring 9, and one end of the lever 92 is fixedly connected to the control ring 9. A second column 34 is provided on the workbench 3, which can abut against the lever 92 after the loading tray 5 rotates, and the second column 34 is correspondingly arranged with the lower mold assembly.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automobile parts die-casting device, comprising a frame (1), a support frame (11) fixedly connected to the frame (1), an upper die assembly provided on the support frame (11), and a lower die assembly provided on the frame (1) below the support frame (11) corresponding to the upper die assembly, characterized in that: The frame (1) is rotatably connected to a workbench (3); the lower mold assemblies are a plurality of lower mold assemblies arranged in a circular array around the rotation axis of the workbench (3); a furnace (4) is provided on the frame (1); a discharge port (42) is provided at the bottom of the furnace (4); a loading tray (5) is provided on the frame (1) between the furnace (4) and the workbench (3); the loading tray (5) is rotatably connected to the frame (1); the discharge port (42) of the furnace (4) abuts against the loading tray (5); A plurality of material storage boxes (51) are arranged in a circular array around the rotation axis of the loading tray (5), the material storage boxes (51) are provided with an opening (53) at the top and a feeding port (52) at the bottom, and after the loading tray (5) rotates, the opening (53) of the material storage box (51) can be aligned with the discharge port (42), and the loading tray (5) is provided with a control device (6) for controlling the opening and closing of the feeding port (52) of the material storage box (51); the control device (6) includes a control device (6) arranged at the feeding port (51); 2) a baffle plate (61) below, when the material storage box (51) rotates to above the lower mold assembly, the control assembly arranged on the loading tray (5) drives the baffle plate (61) to move so as to open the feeding port (52), the baffle plate (61) is arranged on the loading tray (5) to slide radially along the loading tray (5), the loading tray (5) is provided with an elastic member driving the baffle plate (61) to slide below the feeding port (52), and the control assembly includes a connecting plate (63) arranged at the bottom of the loading tray (5) The connecting plate (63) is fixedly connected to the slider (621); a control groove (631) is provided at the bottom of the connecting plate (63); a first column (33) is provided on the workbench (3) and can be rotated into the control groove (631) and abut against the side wall of the control groove (631); the side surface of the control groove (631) abutting against the first column (33) is a guide surface (632); the guide surface (632) is arranged in a wave shape and is convex in the middle; the first column (33) is arranged corresponding to the lower mold assembly.

2. The die-casting equipment for automobile parts according to claim 1, characterized in that: The baffle plate (61) is fixedly connected to side plates (62) on both sides, and a slider (621) is provided at one end of the side plate (62) away from the baffle plate (61), and a slide groove cooperating with the slider (621) is provided at the bottom of the loading tray (5).

3. The die-casting equipment for automobile parts according to claim 1, characterized in that: The bottom of the melting furnace (4) is provided with a switch valve (7) for controlling the opening and closing of the discharge port (42). When the opening (53) of the material storage box (51) rotates to below the discharge port (42), the switch valve (7) is in an open state.

4. The die-casting equipment for automobile parts according to claim 3, characterized in that: The switch valve (7) comprises a control rod (71) rotatably arranged at the bottom of the melting furnace (4), the control rod (71) is provided with a control hole (711) for the aluminum liquid to flow out, and the frame (1) is provided with a first servo motor (72) for driving the control rod (71) to rotate.

5. The die-casting equipment for automobile parts according to claim 4, characterized in that: A moving contact (54) is embedded on the outer circumferential surface of the loading tray (5), and the moving contact (54) is arranged corresponding to the material storage box (51). A static contact (8) is provided at the bottom of the melting furnace (4). When the opening (53) of the material storage box (51) rotates to below the discharge port (42), the moving contact (54) contacts the static contact (8), and the first servo motor (72) drives the control rod (71) to rotate, thereby opening the discharge port (42).

6. The die-casting equipment for automobile parts according to claim 1, characterized in that: The frame (1) is provided with a driving member for driving the workbench (3) to rotate, the rotating shaft of the workbench (3) is provided with a driving gear (32), and the rotating shaft of the workbench (3) is fixedly connected with a driven gear (55) meshing with the driving gear (32).

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