Aluminum wire drawing machine capable of automatically adjusting polishing direction

Abstract

The invention relates to the technical field of aluminum product machining, and discloses an aluminum product wire drawing machine capable of automatically adjusting the polishing orientation, the aluminum product wire drawing machine capable of automatically adjusting the polishing orientation comprises a workbench, a bearing piece is arranged above the workbench, and supporting plates are arranged on the two sides of the lower portion of the bearing piece; a plurality of sets of balls are rotationally installed on the sides, away from each other, of the two sets of supporting plates, an adjusting mechanism is arranged between the bearing piece and the supporting plates, two sets of side grinding rollers are arranged above the workbench and connected with the workbench through adjusting assemblies, an upper grinding mechanism is arranged above the bearing piece, and a lower grinding mechanism is arranged above the upper grinding mechanism and connected with the workbench through adjusting assemblies. The two sides of the U-shaped aluminum groove profile can be polished at the same time, the polishing efficiency can be improved, and the two sides of the U-shaped aluminum groove profile can be supported through the supporting plates, so that when the two sides of the U-shaped aluminum groove profile are polished, the two sides of the U-shaped aluminum groove profile are not prone to deformation.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum material processing, and in particular to an aluminum material wire drawing machine capable of automatically adjusting the polishing orientation. Background Art

[0002] Aluminum wire drawing machine is mainly used for sanding and wire drawing of metal sheets and finished plate products. The machine uses physical properties so that the performance of the workpiece does not change during polishing. After wire drawing, the surface texture of the workpiece presents clear straight hairline texture, the surface of the workpiece is flat and smooth, the visual effect is good, the workpiece is full of beauty, and the workpiece is more upscale. Especially after wire drawing and then oxidation treatment, the added value of the product is greatly improved.

[0003] When processing U-shaped aluminum channel profiles, the existing aluminum wire drawing machines generally process the surfaces of the U-shaped aluminum channel profiles in sequence. The U-shaped aluminum channel profiles need to be processed three times with the same operation steps, and the processing efficiency is relatively low. Summary of the invention

[0004] Technical issues solved In view of the above-mentioned shortcomings of the prior art, the present invention provides an aluminum wire drawing machine which can automatically adjust the polishing orientation, which can effectively solve the problem that the prior art U-shaped aluminum channel profile processing requires its surface to be processed sequentially and the processing efficiency is low. Technical Solution

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides an aluminum wire drawing machine capable of automatically adjusting the polishing position, comprising: a workbench, a supporting member is arranged above the workbench, support plates are arranged on both sides below the supporting member, a plurality of groups of balls are rotatably installed on one side of two groups of support plates away from each other, an adjustment mechanism is arranged between the supporting member and the support plate, two groups of side grinding rollers are arranged above the workbench, the side grinding rollers are connected to the workbench through an adjustment component, and an upper grinding mechanism is arranged above the supporting member.

[0006] Furthermore, the adjustment mechanism includes a cylinder, which is horizontally arranged, and connecting rods are slidably inserted at both ends of the cylinder. The external movable sleeve of the connecting rod is provided with a No. 1 spring, and the No. 1 spring is fixedly connected to the cylinder. A support member is provided under the cylinder, and a No. 1 connecting plate is rotatably installed on both sides of the support member, and the No. 1 connecting plate is connected to the support plate through a rotating assembly.

[0007] Furthermore, the rotating assembly includes a rotating shaft and a power structure. There are two groups of rotating shafts, which are respectively fixedly mounted on adjacent sides of two groups of support plates. The rotating shafts are horizontally arranged, and the axis of the rotating shaft is perpendicular to the axis of the cylinder. The rotating shaft is rotatably connected to an end of the No. 1 connecting plate away from the support member, the rotating shaft is rotatably connected to the connecting rod, and the power structure is connected to the lower end of the support plate.

[0008] Furthermore, the power structure includes a base plate, a support rod, a No. 2 spring and a No. 2 connecting plate, the base plate is fixedly installed above the workbench, the support rod slides through the base plate, the support rod and the support member are fixedly connected, the No. 2 spring is movably sleeved on the outside of the support rod, the No. 2 spring is located between the support member and the base plate, one end of the No. 2 connecting plate is rotatably connected to the base plate, and the other end of the No. 2 connecting plate is rotatably connected to the lower end of the support plate.

[0009] Furthermore, there are two groups of cylinders, and a rotating structure is commonly provided on the outside of the two groups of cylinders, and the rotating structure is connected to the rotating shaft. A gear is fixedly sleeved on the outside of the cylinder, and a rack is fixedly installed under the supporting member, and the rack is meshed with the gear, and a supporting structure is provided on the outside of the supporting member.

[0010] Furthermore, the rotating structure includes a No. 1 motor, which is fixedly installed on the top of the support. The No. 1 motor and the outer parts of the two groups of cylinders are jointly movable with a track. A No. 3 spring is arranged between the two groups of cylinders, and the No. 3 spring is sleeved on the outside of the rotating shaft.

[0011] Furthermore, the supporting structure includes a supporting block, a connecting block and a No. 5 spring, the supporting block and the supporting member are slidably connected, the connecting block and the rotating shaft are slidably connected, the supporting block and the connecting block are slidably connected, the No. 5 spring is movably sleeved on the outside of the rotating shaft, and the No. 5 spring and the connecting block are fixedly connected.

[0012] Furthermore, the adjustment assembly includes a movable track, which is fixedly installed above the workbench, and two sets of mounting frames are slidably installed above the movable track. A cross bar slides through the inside of the mounting frame, and an external movable sleeve of the cross bar is provided with a No. 4 spring, and the No. 4 spring is fixedly connected to the mounting frame. A frame body is fixedly installed at one end of the cross bar, and the frame body is connected to the side grinding roller.

[0013] Furthermore, the upper grinding mechanism includes an upper grinding roller, a limit member and a mounting plate, wherein the mounting plate is arranged above the supporting member, and the mounting plate is connected to the workbench through a lifting structure, and the upper grinding roller and the limit member are both installed below the mounting plate, and the number of the limit members is two groups. The upper grinding roller is located between the two groups of limit members, and the number of the limit members in each group is two.

[0014] Furthermore, the lifting structure includes a threaded rod, a No. 2 motor and a fixed frame, the fixed frame is fixedly installed above the workbench, the fixed frame and the mounting plate are slidably connected, the No. 2 motor is fixedly installed below the workbench, the output end of the No. 2 motor passes through the workbench and extends to the top of the workbench, the threaded rod and the output end of the No. 2 motor are fixedly connected, and the threaded rod and the mounting plate are threadedly connected. Beneficial Effects

[0015] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention is provided with an aluminum wire drawing machine which can automatically adjust the polishing direction, which can grind both sides of the U-shaped aluminum trough profile at the same time, which is beneficial to improving the grinding efficiency, and can support both sides of the U-shaped aluminum trough profile through a support plate, so that when grinding both sides of the U-shaped aluminum trough profile, both sides of the U-shaped aluminum trough profile are not easy to deform, and the angle of the support plate can be adjusted according to the different angles of the two sides of the U-shaped aluminum trough profile, so that the application range of the device is wider, and at the same time, the supporting part can drive the U-shaped aluminum trough profile to move back and forth, so that the upper grinding roller can grind the part pressed by the limit part, so that the grinding of the U-shaped aluminum trough profile is more comprehensive, and it is beneficial to improve the grinding effect of the U-shaped aluminum trough profile. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present invention; Figure 2 It is a schematic diagram of another state of the local structure of an embodiment of the present invention; Figure 3 It is a schematic diagram of a local structure of an embodiment of the present invention; Figure 4 A partial structural cross-sectional view of an embodiment of the present invention; Figure 5 A schematic diagram of a local structure of an embodiment of the present invention from another viewing angle; Figure 6 It is a partial structural schematic diagram of an embodiment of the present invention; Figure 7 It is a schematic diagram of a part of the structure of an embodiment of the present invention.

[0018] The numbers in the figure represent: 1. workbench; 2. supporting member; 3. supporting plate; 4. ball bearing; 5. cylinder; 6. connecting rod; 7. No. 1 spring; 8. supporting member; 9. bottom plate; 10. supporting rod; 11. No. 2 spring; 12. No. 1 connecting plate; 13. No. 2 connecting plate; 14. No. 1 motor; 15. track; 16. No. 3 spring; 17. gear; 18. rack; 19. rotating shaft; 20. upper grinding roller; 21. limit member; 22. mounting plate; 23. threaded rod; 24. No. 2 motor; 25. fixed frame; 26. side grinding roller; 27. movable track; 28. mounting frame; 29. ​​cross bar; 30. No. 4 spring; 31. supporting block; 32. connecting block; 33. No. 5 spring; 34. frame. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The present invention will be further described below in conjunction with the embodiments. Example

[0021] See also Figure 1-Figure 7 The present invention provides a technical solution: an aluminum wire drawing machine capable of automatically adjusting the polishing position, comprising a workbench 1, a supporting member 2 is arranged above the workbench 1, supporting plates 3 are arranged on both sides below the supporting member 2, a plurality of groups of balls 4 are rotatably installed on one side of the two groups of supporting plates 3 away from each other, an adjusting mechanism is arranged between the supporting member 2 and the supporting plate 3, two groups of side grinding rollers 26 are arranged above the workbench 1, the side grinding rollers 26 are connected to the workbench 1 through an adjusting assembly, and an upper grinding mechanism is arranged above the supporting member 2.

[0022] Specifically, the adjustment mechanism includes a cylinder 5, which is horizontally arranged. Connecting rods 6 are slidably inserted at both ends of the cylinder 5. A No. 1 spring 7 is provided on the outer movable sleeve of the connecting rod 6. The No. 1 spring 7 is fixedly connected to the cylinder 5. A support member 8 is provided below the cylinder 5. A No. 1 connecting plate 12 is rotatably installed on both sides of the support member 8. The No. 1 connecting plate 12 is connected to the support plate 3 through a rotating assembly.

[0023] The rotating assembly includes a rotating shaft 19 and a power structure. There are two groups of rotating shafts 19. The two groups of rotating shafts 19 are fixedly installed on adjacent sides of the two groups of support plates 3 respectively. The rotating shafts 19 are horizontally arranged, and the axis of the rotating shaft 19 is perpendicular to the axis of the cylinder 5. The rotating shaft 19 is rotatably connected to the end of the No. 1 connecting plate 12 away from the support member 8, the rotating shaft 19 is rotatably connected to the connecting rod 6, and the power structure is connected to the lower end of the support plate 3.

[0024] The power structure includes a base plate 9, a support rod 10, a No. 2 spring 11 and a No. 2 connecting plate 13. The base plate 9 is fixedly installed above the workbench 1. The support rod 10 slides through the base plate 9. The support rod 10 and the support member 8 are fixedly connected. The No. 2 spring 11 is movably sleeved on the outside of the support rod 10. The No. 2 spring 11 is located between the support member 8 and the base plate 9. One end of the No. 2 connecting plate 13 is rotatably connected to the base plate 9, and the other end of the No. 2 connecting plate 13 is rotatably connected to the lower end of the support plate 3.

[0025] Furthermore, there are two groups of cylinders 5, and a rotating structure is commonly provided on the outside of the two groups of cylinders 5, and the rotating structure is connected to the rotating shaft 19. A gear 17 is fixedly sleeved on the outside of the cylinder 5, and a rack 18 is fixedly installed under the supporting member 2, and the rack 18 is meshed with the gear 17, and a supporting structure is provided on the outside of the supporting member 2.

[0026] The rotating structure includes a No. 1 motor 14, which is fixedly installed on the top of the support 8. The No. 1 motor 14 and the outside of the two groups of cylinders 5 are jointly movably sleeved with a track 15. A No. 3 spring 16 is arranged between the two groups of cylinders 5, and the No. 3 spring 16 is sleeved on the outside of the rotating shaft 19.

[0027] The supporting structure includes a supporting block 31, a connecting block 32 and a No. 5 spring 33. The supporting block 31 is slidably connected to the supporting member 2, the connecting block 32 is slidably connected to the rotating shaft 19, the supporting block 31 and the connecting block 32 are slidably connected, the No. 5 spring 33 is movably sleeved on the outside of the rotating shaft 19, and the No. 5 spring 33 and the connecting block 32 are fixedly connected.

[0028] When the U-shaped aluminum groove profile is polished, the two sides of the U-shaped aluminum groove profile are not easily deformed, and the ball bearings 4 can reduce the friction between the support plate 3 and the U-shaped aluminum groove profile.

[0029] Furthermore, when the angle between the two sides of the U-shaped aluminum trough profile and its upper end is greater than ninety degrees, on the basis of the above steps, the U-shaped aluminum trough profile continues to move downward. At this time, the upper end of the support plate 3 contacts the upper ends of the two sides of the U-shaped aluminum trough profile, and the No. 1 connecting plate 12 no longer rotates. The cylinder 5, the connecting rod 6, the support member 8 and the No. 1 connecting plate 12 can be regarded as a whole. The U-shaped aluminum trough profile drives the support member 8 to move downward. Under the action of the support rod 10, the support rod 10 slides downward inside the bottom plate 9. At this time, the support rod 10 can slide inside the workbench 1, and the support member 8 approaches the bottom plate 9. At this time, the No. 2 spring 11 is deformed by the force, and the support plate 3 can drive the No. 2 connecting plate 13 to move downward away from the end of the bottom plate 9. At this time, the No. 2 connecting plate 13 rotates, and the No. 2 connecting plate 13 can push the lower end of the support plate 3 to move away from the bottom plate 9, so that the support plate 3 can rotate around the rotating shaft 19, thereby being able to support the two sides of the U-shaped aluminum trough profile at different angles, making the application range of the device wider.

[0030] Furthermore, the No. 1 motor 14 is connected to an external power source, and the No. 1 motor 14 drives the track 15 to rotate. The friction between the track 15 and the cylinder 5 can drive the cylinder 5 to rotate. Since the gear 17 and the rack 18 are engaged, the cylinder 5 can drive the supporting member 2 to move back and forth. When the supporting member 2 moves, the support block 31 and the connecting block 32 can support the supporting member 2. When one end of the supporting member 2 moves out of the length range of the rotating shaft 19, the supporting member 2 does not contact the support block 31, and the No. 5 spring 33 can push the connecting block 32 to be located at the end of the rotating shaft 19, so that the support block 31 can support the supporting member 2, which is beneficial to increase the stability of the supporting member 2 during the movement.

[0031] It should be noted that when the two groups of cylinders 5 move downward, the No. 3 spring 16 pushes the two groups of cylinders 5 away from each other, so that the track 15 is always in a taut state, so that the track 15 can drive the cylinders 5 to rotate.

[0032] Specifically, the adjustment component includes a movable rail 27, which is fixedly installed above the workbench 1. Two sets of mounting frames 28 are slidably installed above the movable rail 27. A cross bar 29 slides through the inside of the mounting frame 28. The outer movable sleeve of the cross bar 29 is provided with a No. 4 spring 30. The No. 4 spring 30 is fixedly connected to the mounting frame 28. A frame body 34 is fixedly installed at one end of the cross bar 29, and the frame body 34 is connected to the side grinding roller 26.

[0033] The movable track 27 drives the two groups of mounting frames 28 to approach each other. Under the action of the cross bar 29, the mounting frame 28 drives the side grinding roller 26 to move synchronously through the frame body 34. When the side grinding roller 26 contacts the side of the U-shaped aluminum trough profile, the mounting frame 28 continues to move toward the direction of the U-shaped aluminum trough profile. Since the side of the U-shaped aluminum trough profile is inclined, the upper and lower forces of the side grinding roller 26 are uneven, and the upper end is subjected to less force. The side of the U-shaped aluminum trough profile can push the lower end of the side grinding roller 26 to move toward the mounting frame 28. At this time, the No. 4 spring 30 is deformed by the force, and the lower end cross bar 29 can slide upward inside the frame body 34, causing the side grinding roller 26 to tilt, and the axis of the side grinding roller 26 is parallel to the side of the U-shaped aluminum trough profile, which is convenient for grinding the side of the U-shaped aluminum trough profile.

[0034] Specifically, the upper grinding mechanism includes an upper grinding roller 20, a limit member 21 and a mounting plate 22. The mounting plate 22 is arranged above the supporting member 2. The mounting plate 22 is connected to the workbench 1 through a lifting structure. The upper grinding roller 20 and the limit member 21 are both installed below the mounting plate 22. There are two groups of limit members 21. The upper grinding roller 20 is located between the two groups of limit members 21. There are two limit members 21 in each group.

[0035] The lifting structure includes a threaded rod 23, a No. 2 motor 24 and a fixed frame 25. The fixed frame 25 is fixedly installed above the workbench 1. The fixed frame 25 and the mounting plate 22 are slidably connected. The No. 2 motor 24 is fixedly installed below the workbench 1. The output end of the No. 2 motor 24 passes through the workbench 1 and extends to the top of the workbench 1. The threaded rod 23 and the output end of the No. 2 motor 24 are fixedly connected. The threaded rod 23 and the mounting plate 22 are threadedly connected.

[0036] The No. 2 motor 24 is connected to an external power source, and the output end of the No. 2 motor 24 drives the threaded rod 23 to rotate. Since the threaded rod 23 and the mounting plate 22 are threadedly connected, under the action of the fixing frame 25, the mounting plate 22 can drive the upper grinding roller 20 and the limit member 21 to move synchronously. The limit member 21 limits the upper end of the U-shaped aluminum trough profile and can provide power for the movement of the U-shaped aluminum trough profile. The upper grinding roller 20 can grind the upper end surface of the U-shaped aluminum trough profile. When grinding the upper end surface of the U-shaped aluminum trough profile, the supporting member 2 can drive the U-shaped aluminum trough profile to move back and forth, which is convenient for grinding the upper end surface of the U-shaped aluminum trough profile at the pressing position of the limit member 21, so that the grinding effect of the upper end surface of the U-shaped aluminum trough profile is better.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An aluminum wire drawing machine capable of automatically adjusting the polishing position, characterized in that: include: A workbench (1), wherein a supporting member (2) is arranged above the workbench (1), supporting plates (3) are arranged on both sides below the supporting member (2), and a plurality of groups of balls (4) are rotatably mounted on one side of two groups of supporting plates (3) away from each other, an adjustment mechanism is arranged between the supporting member (2) and the supporting plate (3), two groups of side grinding rollers (26) are arranged above the workbench (1), and the side grinding rollers (26) are connected to the workbench (1) via an adjustment component, and an upper grinding mechanism is arranged above the supporting member (2).

2. The aluminum wire drawing machine capable of automatically adjusting the polishing position according to claim 1 is characterized in that: The adjustment mechanism comprises a cylinder (5), the cylinder (5) is arranged horizontally, connecting rods (6) are slidably inserted at both ends of the cylinder (5), a No. 1 spring (7) is provided on the outer movable sleeve of the connecting rod (6), the No. 1 spring (7) and the cylinder (5) are fixedly connected, a support member (8) is arranged below the cylinder (5), and a No. 1 connecting plate (12) is rotatably mounted on both sides of the support member (8), and the No. 1 connecting plate (12) is connected to the support plate (3) through a rotating assembly.

3. The aluminum wire drawing machine capable of automatically adjusting the polishing position according to claim 2 is characterized in that: The rotating assembly comprises a rotating shaft (19) and a power structure. The rotating shaft (19) is provided in two groups. The two groups of rotating shafts (19) are respectively fixedly mounted on adjacent sides of two groups of support plates (3). The rotating shaft (19) is arranged horizontally. The axis of the rotating shaft (19) is perpendicular to the axis of the cylinder (5). The rotating shaft (19) is rotatably connected to an end of the first connecting plate (12) away from the support member (8). The rotating shaft (19) is rotatably connected to the connecting rod (6). The power structure is connected to the lower end of the support plate (3).

4. The aluminum wire drawing machine capable of automatically adjusting the polishing position according to claim 3 is characterized in that: The power structure comprises a base plate (9), a support rod (10), a second spring (11) and a second connecting plate (13); the base plate (9) is fixedly mounted above the workbench (1); the support rod (10) slides through the base plate (9); the support rod (10) and the support member (8) are fixedly connected; the second spring (11) is movably sleeved on the outside of the support rod (10); the second spring (11) is located between the support member (8) and the base plate (9); one end of the second connecting plate (13) is rotatably connected to the base plate (9); and the other end of the second connecting plate (13) is rotatably connected to the lower end of the support plate (3).

5. The aluminum wire drawing machine capable of automatically adjusting the polishing position according to claim 3 is characterized in that: The cylinders (5) are provided in two groups. A rotating structure is commonly provided on the outside of the two groups of cylinders (5). The rotating structure is connected to a rotating shaft (19). A gear (17) is fixedly provided on the outside of the cylinders (5). A rack (18) is fixedly installed below the supporting member (2). The rack (18) is meshed with the gear (17). A supporting structure is provided on the outside of the supporting member (2).

6. The aluminum wire drawing machine capable of automatically adjusting the polishing position according to claim 5, characterized in that: The rotating structure comprises a No. 1 motor (14), the No. 1 motor (14) being fixedly mounted above the support member (8), the No. 1 motor (14) and the exterior of the two groups of cylinders (5) being movably sleeved with a crawler belt (15), a No. 3 spring (16) being arranged between the two groups of cylinders (5), the No. 3 spring (16) being sleeved on the exterior of a rotating shaft (19).

7. The aluminum wire drawing machine capable of automatically adjusting the polishing position according to claim 5, characterized in that: The support structure comprises a support block (31), a connecting block (32) and a No. 5 spring (33); the support block (31) and the supporting member (2) are slidably connected; the connecting block (32) and the rotating shaft (19) are slidably connected; the support block (31) and the connecting block (32) are slidably connected; the No. 5 spring (33) is movably sleeved outside the rotating shaft (19); and the No. 5 spring (33) and the connecting block (32) are fixedly connected.

8. The aluminum wire drawing machine capable of automatically adjusting the polishing position according to claim 1, characterized in that: The adjustment assembly comprises a movable track (27), wherein the movable track (27) is fixedly mounted above the workbench (1), and two sets of mounting frames (28) are slidably mounted above the movable track (27), a cross bar (29) is slidably penetrated inside the mounting frame (28), and a No. 4 spring (30) is provided on the outer movable sleeve of the cross bar (29), and the No. 4 spring (30) and the mounting frame (28) are fixedly connected, and a frame body (34) is fixedly mounted on one end of the cross bar (29), and the frame body (34) is connected to the side grinding roller (26).

9. The aluminum wire drawing machine capable of automatically adjusting the polishing position according to claim 1, characterized in that: The upper grinding mechanism comprises an upper grinding roller (20), a limiting member (21) and a mounting plate (22); the mounting plate (22) is arranged above the supporting member (2); the mounting plate (22) is connected to the workbench (1) via a lifting structure; the upper grinding roller (20) and the limiting member (21) are both mounted below the mounting plate (22); the limiting members (21) are provided in two groups; the upper grinding roller (20) is located between the two groups of limiting members (21); and the limiting members (21) in each group are provided in two groups.

10. The aluminum wire drawing machine capable of automatically adjusting the polishing position according to claim 9, characterized in that: The lifting structure comprises a threaded rod (23), a second motor (24) and a fixing frame (25); the fixing frame (25) is fixedly mounted above the workbench (1); the fixing frame (25) and the mounting plate (22) are slidably connected; the second motor (24) is fixedly mounted below the workbench (1); the output end of the second motor (24) passes through the workbench (1) and extends to the top of the workbench (1); the threaded rod (23) and the output end of the second motor (24) are fixedly connected; and the threaded rod (23) and the mounting plate (22) are threadedly connected.

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