Plate bending device for charging pile production

Abstract

The invention discloses a plate bending device for charging pile production, and particularly relates to the technical field of charging pile production device.The plate bending device comprises four supporting legs, an operation part is jointly fixed to the upper ends of the four supporting legs, and a downward pressing part is fixed to the middle of the upper end of the operation part; a clamping part matched with the downward pressing part is fixed to the upper end of the operation part, a pushing part matched with the downward pressing part is arranged on the rear side of the upper end of the operation part, a pushing part is fixed to the rear side of the middle of the upper end of the operation part, and the operation part comprises an operation table fixed to the upper ends of the four supporting legs. According to the plate bending device for charging pile production, through mutual cooperation of the operation component, the downward pressing component, the clamping component, the matching component and the pushing component, automatic discharging after plate bending can be achieved, meanwhile, the bent plate is prevented from being clamped on a mold, the bending efficiency of the device is improved, a power source does not need to be additionally arranged, and the cost is reduced. And resources are saved.

Description

Technical Field

[0001] This invention relates to the field of charging pile production equipment technology, and in particular to a sheet metal bending device for charging pile production. Background Technology

[0002] In the production of charging piles, sheet metal bending devices are needed to bend the raw materials of the charging piles. For example, the outer shell of the charging pile is composed of multiple metal plates. The joints of the metal plates generally need to be bent to accommodate the corners. The bent metal plates have a larger contact area, which makes the charging pile stronger after assembly.

[0003] Chinese patent document CN115055554B discloses a sheet metal bending device for charging pile production, including a workbench and further comprising: a vertical plate fixedly connected to one end of the workbench, wherein a top plate is fixedly connected to the upper end of the workbench via a bracket, a support plate is fixedly connected to the lower end of the top plate, and a pressure plate is rotatably connected to the end of the support plate via a rotating rod; a hydraulic cylinder fixedly installed at the lower end of the top plate, wherein a top pressure wheel corresponding to the upper surface of the pressure plate is rotatably installed at the end of the telescopic rod of the hydraulic cylinder; and a device block fixedly connected to the lower side wall of the support plate and located at the upper end of the workbench, wherein a sliding groove is provided at the lower end of the device block; this device can automatically fix and unload sheet metal, reducing manual operation processes, improving sheet metal bending efficiency, and also realizing automatic unloading of sheet metal.

[0004] Although the device can automatically unload the sheet metal, it cannot prevent the bent sheet metal from getting stuck on the mold while unloading, and the automatic unloading of the device requires an additional power source, which wastes resources. Summary of the Invention

[0005] The main objective of this invention is to provide a sheet metal bending device for charging pile production, which can effectively solve the problem of preventing the bent sheet metal from getting stuck on the mold while automatically feeding the sheet metal.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A sheet metal bending device for charging pile production includes four support legs. An operating component is fixed to the upper end of each of the four support legs. A pressing component is fixed to the middle of the upper end of the operating component. A locking component adapted to the pressing component is fixed to the upper end of the operating component. A pushing component adapted to the pressing component is provided on the rear side of the upper end of the operating component. A pushing component is fixed to the rear side of the middle of the upper end of the operating component.

[0008] Preferably, the operating component includes an operating platform fixed to the upper end of the four support legs. A lower mold is fixed to the middle of the upper end of the operating platform. Right-angled U-shaped blocks are fixed to both the left and right sides of the lower mold on the upper end of the operating platform. Two symmetrical spring rod assemblies are provided at the upper ends of the two right-angled U-shaped blocks. A support block is fixed to the upper ends of the two spring rod assemblies on the same side.

[0009] Preferably, two symmetrical fixing plates are fixed at the lower center of the operating table. The two fixing plates are provided with a bidirectional screw at their close ends. An output motor adapted to the bidirectional screw is fixed at the end of any fixing plate away from the center line of the operating table. Two symmetrical sliding plates are provided on the outer surface of the bidirectional screw. Two grooves adapted to the sliding plates are provided at the upper end of the operating table. Telescopic rods are provided at the ends of the two sliding plates away from each other. Alignment plates are fixed at the ends of the two telescopic rods close to each other.

[0010] Preferably, the pressing component includes a right-angled U-shaped plate fixed to the left side of the upper end of the operating table, a connecting plate fixed to the right end of the right-angled U-shaped plate, a downward-penetrating cylinder fixed to the upper end of the connecting plate, an installation plate fixed to the output end of the cylinder, and an upper mold fixed to the lower end of the installation plate.

[0011] Preferably, a fixing block is fixed to the front right side of the upper end of the mounting plate, a sliding plate is fixed to the rear end of the fixing block by a spring, a connecting rod is fixed to the rear left end of the sliding plate, a support plate is fixed to the left end of the mounting plate, and a rack is fixed to the rear lower end of the support plate.

[0012] Preferably, the locking component includes an L-shaped block fixed to the upper end of the operating table, a limiting plate fixed to the rear end of the horizontal part of the L-shaped block, a spring fixed to the lower end of the horizontal part of the L-shaped block, and a locking block slidably connected to the limiting plate fixed to the lower end of the spring.

[0013] Preferably, the right end of the locking block is provided with a sliding groove adapted to the connecting rod, and the lower side of the right end of the locking block is provided with a spiral groove that communicates with the sliding groove.

[0014] Preferably, the mating component includes a straight plate fixed to the upper end of the operating table, a second cylinder fixed to the front end of the straight plate, a first push block fixed to the output end of the second cylinder, an L-shaped plate fixed to the front end of the first push block, a second push block fixed to the upper end of the vertical part of the L-shaped plate, and the first push block and the second push block are adapted to the connecting rod.

[0015] Preferably, the pushing component includes a vertical plate and a side plate disposed on the upper end of the operating table. The rear end of the vertical plate is provided with a sliding rod that passes forward through it. A push plate is fixed to the front end of the sliding rod. A spring is fixed between the push plate and the vertical plate. A stop block is fixed to the rear side of the upper end of the push plate. A connecting support plate is fixed to the left end of the vertical plate. A transmission screw that passes forward through the connecting support plate is provided at the rear end of the side plate. A gear that meshes with a rack is fixed to the rear end of the transmission screw.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This device, through the coordinated operation of operating components, pressing components, locking components, cooperating components, and pushing components, can automatically unload bent sheet metal while preventing the bent sheet metal from getting stuck on the mold, thus improving the bending efficiency of the device. It also eliminates the need for an additional power source, saving resources. A cylinder is used to bend the sheet metal using the upper mold, while a connecting rod moves downwards within the slide groove. After bending, a cylinder pushes a pusher block, changing the position of the connecting rod. The connecting rod then pushes the locking block, releasing the stored energy in a spring, causing the pusher plate to eject the sheet metal from the recessed area of ​​the upper mold. This achieves automatic unloading while preventing the bent sheet metal from getting stuck on the mold. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the overall structure of the operating component of the present invention. Figure 1 ;

[0021] Figure 4 This is a schematic diagram of the overall structure of the operating component of the present invention. Figure 2 ;

[0022] Figure 5 This is a schematic diagram of the overall structure of the pressing component of the present invention;

[0023] Figure 6 This is a schematic diagram of the overall structure of the locking component of the present invention;

[0024] Figure 7 This is a schematic diagram of the overall structure of the carding block of the present invention;

[0025] Figure 8 This is a schematic diagram of the mating structure of the pressing component and the locking component of the present invention;

[0026] Figure 9 This is a schematic diagram of the overall structure of the components used in this invention;

[0027] Figure 10 This is a schematic diagram of the overall structure of the driving component of the present invention;

[0028] Figure 11 This is a schematic diagram of the operating state of the present invention.

[0029] In the diagram: 1. Support leg; 2. Operating component; 20. Operating table; 21. Lower mold; 22. Right-angle U-shaped block; 23. Spring rod assembly; 24. Support block; 25. Fixing plate; 26. Bidirectional screw; 27. Sliding plate; 28. Telescopic rod; 29. ​​Alignment plate; 3. Pressing component; 30. Right-angle U-shaped plate; 31. Connecting plate; 32. Cylinder 1; 33. Mounting plate; 34. Upper mold; 35. Fixing block; 36. Slide plate; 37. Connecting rod; 38. Support plate; 39. Rack; 4. Locking component; 40. L-shaped block; 41. Limiting plate; 42. Spring 1; 43. Locking block; 430. Slide groove; 431. U-shaped groove; 5. Mating component; 50. Straight plate; 51. Cylinder 2; 52. Push block 1; 53. L-shaped plate; 54. Push block 2; 6. Pushing component; 60. Vertical plate; 61. Slide rod; 63. Spring 2; 64. Stop block; 65. Push plate; 66. Connecting support plate; 67. Vertical plate; 68. Gear; 69. Transmission screw. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Example 1

[0031] like Figure 1 and Figure 2 As shown, a sheet metal bending device for charging pile production includes four support legs 1. An operating component 2 is fixed to the upper end of the four support legs 1. A pressing component 3 is fixed to the middle of the upper end of the operating component 2. The pressing component 3 is used to bend the sheet metal. A locking component 4 adapted to the pressing component 3 is fixed to the upper end of the operating component 2. The component in the pressing component 3 cooperates with the component in the locking component 4 to push the component in the locking component 4. A pushing component 6 adapted to the pressing component 3 is provided on the rear side of the upper end of the operating component 2. The pushing component 6 is fixed to the left side of the locking component 4 at the upper end of the operating component 2. The pushing component 6 is fixed to the rear side of the middle of the upper end of the operating component 2.

[0032] Furthermore, such as Figure 3 and Figure 4As shown, the operating component 2 includes an operating platform 20 fixed to the upper end of four support legs 1. The four legs 1 are located at the four corners of the lower end of the operating platform 20 for supporting the device. A lower mold 21 is fixed in the middle of the upper end of the operating platform 20. The lower mold 21 is a mold used for bending the device. Right-angled U-shaped blocks 22 are fixed on both the left and right sides of the lower mold 21 at the upper end of the operating platform 20. The two right-angled U-shaped blocks 22 are in close contact with the left and right ends of the lower mold 21. Two symmetrical spring rod assemblies 23 are provided on the upper end of the two right-angled U-shaped blocks 22. The spring rod assembly 23 includes a round rod and a spring. The round rod passes through the right-angled U-shaped block 22 and can slide downward. The spring is connected to the upper end of the spring rod assembly 23. The upper ends of the two spring rod assemblies 23 on the same side are jointly fixed with a support block 24. The spring in the spring rod assembly 23 is fixed between the support block 24 and the right-angled U-shaped block 22 for supporting the support block 24 and allowing the support block 24 to be compressed and reset.

[0033] Next, two symmetrical fixing plates 25 are fixed at the lower middle part of the operating table 20. The two fixing plates 25 are provided with a bidirectional screw 26 at their close ends. The bidirectional screw 26 is located between the two fixing plates 25 and is rotatably connected to the two fixing plates 25. An output motor adapted to the bidirectional screw 26 is fixed at the end of any fixing plate 25 away from the center line of the operating table 20. The output end of the output motor is fixedly connected to the bidirectional screw 26. Two symmetrical sliding plates 27 are provided on the outer surface of the bidirectional screw 26.

[0034] Two sliding plates 27 are threadedly connected to a bidirectional screw 26. When the bidirectional screw 26 rotates, it can move towards each other or in opposite directions. The upper end of the operating table 20 has two grooves that are adapted to the sliding plates 27 to restrict the movement of the sliding plates 27. Each of the two sliding plates 27 has a telescopic rod 28 at the ends that are far apart from each other. The round rod in the telescopic rod 28 passes through the sliding plate 27 on the same side and is slidably connected to the sliding plate 27. The spring is fixed to the sliding plate 27. Each of the two telescopic rods 28 has an alignment plate 29 fixed at the ends that are close to each other. The two alignment plates 29 can center the plate at the upper end of the lower mold 21 and maintain the position of the plate.

[0035] Furthermore, such as Figure 5 As shown, the pressing component 3 includes a right-angled U-shaped plate 30 fixed to the upper left side of the operating table 20. A connecting plate 31 is fixed to the right end of the right-angled U-shaped plate 30 of the pressing component 3. A cylinder 32 that penetrates downward is fixed to the upper end of the connecting plate 31. The output end of the cylinder 32 faces downward. A mounting plate 33 is fixed to the output end of the cylinder 32. The mounting plate 33 is located on the upper side of the lower mold 21. An upper mold 34 is fixed to the lower end of the mounting plate 33. The upper mold 34 is located directly above the lower mold 21 and cooperates with the lower mold 21 to bend the sheet into a right-angled U-shape.

[0036] Next, a fixing block 35 is fixed to the front right side of the upper end of the mounting plate 33. A sliding plate 36 is fixed to the rear end of the fixing block 35 by a spring. A spring is connected between the fixing block 35 and the sliding plate 36 to support the sliding plate 36. A connecting rod 37 is fixed to the rear left side of the sliding plate 36. The connecting rod 37 is located on the upper side of the mounting plate 33. A support plate 38 is fixed to the left end of the mounting plate 33. A rack 39 is fixed to the rear lower end of the support plate 38. A hole that matches the rack 39 is opened at the upper end of the operating table 20 to facilitate the downward movement of the rack 39.

[0037] Furthermore, such as Figure 6 As shown, the locking component 4 includes an L-shaped block 40 fixed to the upper end of the operating table 20. The vertical part of the L-shaped block 40 is located on the right side of the upper end of the operating table 20. A limit plate 41 is fixed to the rear end of the horizontal part of the L-shaped block 40. A spring 42 is fixed to the lower end of the horizontal part of the L-shaped block 40. A locking block 43 that is slidably connected to the limit plate 41 is fixed to the lower end of the spring 42. The locking block 43 can move up and down on the surface of the limit plate 41 by means of the spring 42.

[0038] Among them, such as Figure 7 and Figure 8 The right end of the locking block 43 is provided with a sliding groove 430 that is adapted to the connecting rod 37. The connecting rod 37 is located in the inner cavity of the sliding groove 430. In the initial state, the connecting rod 37 is located on the upper side of the inner cavity of the sliding groove 430. The lower right end of the locking block 43 is provided with a loop groove 431 that is connected to the sliding groove 430. The sliding groove 430 and the loop groove 431 are interconnected, so that the connecting rod 37 can also move in the inner cavity of the loop groove 431.

[0039] Furthermore, such as Figure 9 As shown, the mating component 5 includes a straight plate 50 fixed to the upper end of the operating table 20. A second cylinder 51 is fixed to the front end of the straight plate 50. A push block 52 is fixed to the output end of the second cylinder 51. The push block 52 is used to push the connecting rod 37 to move in the inner cavity of the groove 431. An L-shaped plate 53 is fixed to the front end of the push block 52. A second push block 54 is fixed to the upper end of the vertical part of the L-shaped plate 53. The second push block 54 is also used to push the connecting rod 37. However, when the first push block 52 and the second push block 54 move, the position of the connecting rod 37 is different. The first push block 52 and the second push block 54 are adapted to the connecting rod 37. When the connecting rod 37 moves to the bottom of the inner cavity of the groove 431, the first push block 52 pushes the connecting rod 37 from the rear to the front. Then the connecting rod 37 moves upward along the inner cavity of the front side of the slide groove 430. Then the second push block 54 pushes the connecting rod 37 from the front to the rear side to connect with the inner cavity of the slide groove 430. Example 2

[0040] This embodiment further defines the pushing component 6 based on Embodiment 1, in order to achieve the purpose of automatically unloading the sheet material after bending it.

[0041] Specifically, such as Figure 10 As shown, the pushing component 6 includes a vertical plate 60 and a vertical plate 67 located on the upper end of the operating table 20. The vertical plate 60 is located to the right of the vertical plate 67 and is slidably connected to the operating table 20. The vertical plate 67 is fixed to the upper end of the operating table 20. A sliding rod 61 extending forward is provided at the rear end of the vertical plate 60 and is slidably connected to the vertical plate 60. A push plate 65 is fixed at the front end of the sliding rod 61. A second spring 63 is fixed between the push plate 65 and the vertical plate 60. The second spring 63 is used to store elastic force. The upper rear side of the push plate 65 is fixed. A stop block 64 is fixed, which cooperates with the locking block 43. The locking block 43 can lock the stop block 64. A connecting support plate 66 is fixed at the left end of the vertical plate 60. A transmission screw 69 is provided at the rear end of the vertical plate 67, which passes through the connecting support plate 66. The transmission screw 69 is threadedly connected to the connecting support plate 66. The vertical plate 60 and the connecting support plate 66 slide on the upper end of the operating table 20. A gear 68 that meshes with the rack 39 is fixed at the rear end of the transmission screw 69. When the transmission screw 69 moves downward, it can rotate the gear 68.

[0042] It should be noted that the spring rod assembly 23, the bidirectional screw 26, the telescopic rod 28, the cylinder 32, the cylinder 51, and the transmission screw 69 in this invention are all existing technologies, and their installation methods and control methods are also conventional designs, which will not be described in detail in this invention.

[0043] Specific implementation of this device: This device is a sheet metal bending device for charging pile production. It can bend the sheet metal into a right-angled U-shape and eject the sheet metal from the mold after bending, which prevents the sheet metal from getting stuck and facilitates unloading.

[0044] When in use, first, place the sheet material on the upper end of the lower mold 21 and the two support blocks 24. Then, use the output motor to drive the bidirectional screw 26 to rotate, so that the two sliding plates 27 move to the lower mold 21. Then, the two alignment plates 29 center and clamp the sheet material to prevent the sheet material from shifting when bending.

[0045] Next, the output end of cylinder 32 moves downward with the mounting plate 33. At this time, the connecting rod 37, located on the upper side of the inner cavity of the slide groove 430, also moves downward. In addition, the rack 39 also moves to one side, which allows the support plate 38 to rotate. Then, the upper mold 34 bends the plate at the upper end of the lower mold 21.

[0046] When the upper mold 34 is located above the lower mold 21 and bends the sheet metal, the connecting rod 37 is located on the bottom wall of the vertical inner cavity behind the slide groove 430.

[0047] When the upper mold 34 moves downward, the rack 39 rotates with the gear 68, causing the transmission screw 69 to move with the connecting support plate 66 and the vertical plate 60 towards the side of the lower mold 21. Meanwhile, the locking block 43 locks the stop block 64, causing the vertical plate 60 to move forward and compress the second spring 63, thus storing energy in the second spring 63.

[0048] Then, as Figure 11 As shown, after the upper mold 34 bends the sheet metal into shape, when it is about to move upward, the output end of the cylinder 2 51 moves forward, so that the push block 1 52 pushes the connecting rod 37 forward in the inner cavity of the horizontal lower side of the loop groove 431. Then the cylinder 1 32 moves the upper mold 34 upward, and then the upper mold 34 moves upward, so that the connecting rod 37 moves upward in the inner cavity of the vertical part in front of the loop groove 431 and will hit the top wall of the upper inner cavity of the horizontal part of the loop groove 431. At this time, the distance between the upper mold 34 and the lower mold 21 is the same as the thickness of the push plate 65.

[0049] Next, the upper mold 34 continues to move upward, and the connecting rod 37 pushes the locking block 43 upward as a whole. When the locking block 43 no longer restricts the stop block 64, the push plate 65 pops out instantly under the action of the second spring 63, popping out the bent and formed sheet material on the lower mold 21 for easy unloading. In addition, the width of the push plate 65 is the same as the width of the recess in the upper mold 34, so the push plate 65 can also push out the sheet material stuck in the recess in the upper mold 34 for easy use of the device.

[0050] Next, driven by rack 39, gear 68 rotates, causing vertical plate 60 to move backward, resetting push plate 65. Then, cylinder 2 51 retracts at output end, causing push block 2 54 to push connecting rod 37 from the upper horizontal cavity of groove 431 to the rear to communicate with the inner cavity of slide groove 430. This causes locking block 43 to spring downward under the action of spring 1 42, and push plate 65 blocks locking block 43, facilitating the next bending.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A plate bending device for charging pile production, comprising four supporting legs (1), characterized in that: The upper end of the four supporting legs (1) is fixed with an operating part (2), the middle of the upper end of the operating part (2) is fixed with a pressing part (3), the upper end of the operating part (2) is fixed with a clamping part (4) matched with the pressing part (3), the rear side of the upper end of the operating part (2) is provided with a pushing part (6) matched with the pressing part (3), and the rear side of the middle of the upper end of the operating part (2) is fixed with the pushing part (6).

2. The plate bending device for charging pile production according to claim 1, characterized in that: The operating part (2) comprises an operating table (20) fixed to the upper end of the four supporting legs (1), the middle of the upper end of the operating table (20) is fixed with a lower mold (21), the left and right sides of the upper end of the lower mold (21) of the operating table (20) are both fixed with a right-angle U-shaped block (22), the upper end of each of the two right-angle U-shaped blocks (22) is provided with two symmetrical spring rod assemblies (23), and the upper ends of the two spring rod assemblies (23) on the same side are jointly fixed with a supporting block (24).

3. The plate bending device for charging pile production according to claim 2, characterized in that: The middle of the lower end of the operating table (20) is fixed with two symmetrical fixed plates (25), the ends of the two fixed plates (25) close to each other are jointly provided with a bidirectional screw rod (26), one end of any one of the fixed plates (25) away from the center line of the operating table (20) is fixed with an output motor matched with the bidirectional screw rod (26), the outer surface of the bidirectional screw rod (26) is provided with two symmetrical sliding plates (27), and the upper end of the operating table (20) is provided with two grooves matched with the sliding plates (27), one end of each of the two sliding plates (27) away from each other is provided with an extension rod (28), and one end of each of the two extension rods (28) close to each other is fixed with a positioning plate (29).

4. The plate bending device for charging pile production according to claim 2, characterized in that: The pressing part (3) comprises a right-angle U-shaped plate (30) fixed to the left side of the upper end of the operating table (20), the right end of the right-angle U-shaped plate (30) is fixed with a connecting plate (31), the upper end of the connecting plate (31) is fixed with a downward penetrating air cylinder I (32), the output end of the air cylinder I (32) is fixed with a mounting plate (33), and the lower end of the mounting plate (33) is fixed with an upper mold (34).

5. The plate bending device for charging pile production according to claim 4, characterized in that: The right part of the front side of the upper end of the mounting plate (33) is fixed with a fixed block (35), the rear end of the fixed block (35) is fixed with a sliding plate (36) through a spring, the left end of the sliding plate (36) is fixed with a connecting rod (37), the left end of the mounting plate (33) is fixed with a supporting plate (38), and the rear side of the lower end of the supporting plate (38) is fixed with a rack (39).

6. The plate bending device for charging pile production according to claim 5, characterized in that: The clamping part (4) comprises an L-shaped block (40) fixed to the upper end of the operating table (20), the rear end of the horizontal part of the L-shaped block (40) is fixed with a limiting plate (41), the lower end of the horizontal part of the L-shaped block (40) is fixed with a spring I (42), and the lower end of the spring I (42) is fixed with a clamping block (43) in sliding connection with the limiting plate (41).

7. The plate bending device for charging pile production according to claim 6, characterized in that: The right end of the clamping block (43) is provided with a sliding groove (430) matched with the connecting rod (37), and the right lower side of the clamping block (43) is provided with a meandering groove (431) in communication with the sliding groove (430).

8. The plate bending device for charging pile production according to claim 7, characterized in that: The fitting component (5) comprises a straight plate (50) fixed on the upper end of the operating table (20), the front end of the straight plate (50) is fixed with a cylinder two (51), the output end of the cylinder two (51) is fixed with a push block one (52), the front end of the push block one (52) is fixed with an L-shaped plate (53), the vertical part of the L-shaped plate (53) is fixed with a push block two (54), and the push block one (52) and the push block two (54) are matched with the connecting rod (37).

9. The plate bending device for charging pile production according to claim 5, characterized in that: The pushing component (6) comprises a vertical plate (60) and a vertical plate (67) arranged on the upper end of the operating table (20), the rear end of the vertical plate (60) is provided with a sliding rod (61) penetrating forward, the front end of the sliding rod (61) is fixed with a push plate (65), the push plate (65) and the vertical plate (60) are fixed with a spring two (63), the upper end of the push plate (65) is fixed with a stop block (64), the left end of the vertical plate (60) is fixed with a connecting branch plate (66), the rear end of the vertical plate (67) is provided with a transmission screw (69) penetrating the connecting branch plate (66) forward, and the rear end of the transmission screw (69) is fixed with a gear (68) engaged with the rack (39).

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