Door frame side frame lock hole punching device

By designing a chip removal mechanism to promptly remove sawdust and dust, the environmental pollution problem caused by the door frame side frame lock hole opening device during processing was solved, achieving clean production and precision processing.

CN223971848UActive Publication Date: 2026-03-06HUIZHOU HEYA WOOD IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-21
Publication Date
2026-03-06

AI Technical Summary

Technical Problem

The existing door frame side frame lock hole opening device causes sawdust and dust to accumulate during processing, which seriously pollutes the environment and affects the health of workers.

Method used

A door frame side frame lock hole opening device was designed, which includes drilling, conveying, lifting, pressing and chip removal mechanisms. The chip removal mechanism can remove wood chips and dust in a timely manner, reducing environmental pollution.

Benefits of technology

It effectively cleans up sawdust and dust generated during processing, prevents environmental pollution, reduces wear and tear on the door frame side frame, and ensures processing accuracy.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN223971848U_ABST
    Figure CN223971848U_ABST
Patent Text Reader

Abstract

The utility model relates to a doorframe side frame lock hole opening device, which comprises a rack, a drilling mechanism, a conveying mechanism, a lifting mechanism, a pressing mechanism and a chip removal mechanism, a track is arranged on the outer side of the rack, the drilling mechanism is connected to the track in a sliding manner, the output end of the drilling mechanism faces downwards, the chip removal mechanism is arranged on the drilling mechanism, and the conveying mechanism is arranged on the conveying mechanism. Two fixing plates and two supports are arranged on the machine frame in a front-back mode, the two supports are located between the two fixing plates, the downward pressing mechanism is installed on the fixing plates, the output end of the downward pressing mechanism horizontally stretches out to the position above the supports, and the lifting mechanism is installed on the portion, between the two supports, of the machine frame. The upper end face of the support is higher than the upper end face of the fixing plate, the chip removal mechanism faces the support, and the upper end face of the conveying mechanism can move up and down to cross the upper end face of the support. And by arranging the chip removal mechanism, wood chips and dust generated in the machining process are discharged in time, and environmental pollution is reduced.
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Description

Technical Field

[0001] This utility model relates to the field of door frame opening technology, specifically to a door frame side frame lock hole opening device. Background Technology

[0002] Drilling the lock holes in the side frame of the door frame is a crucial step in door lock installation. It's primarily used to secure the lock body and ensure a precise fit between the bolt and the lock hole. During operation, the lock hole and bolt groove must be precisely drilled at pre-set positions on the side of the door frame, according to the lock model. Currently, fully automated drilling devices are used for drilling the lock holes in the side frame of the door frame. However, the initial design of these devices did not adequately consider the issue of wood chips, resulting in wood chips accumulating and scattering throughout the workshop during processing. The dust generated during processing fills the workshop, significantly impacting workers and severely polluting the environment. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a door frame side frame lock hole opening device, which promptly discharges wood chips and dust generated during processing by setting a chip removal mechanism, thereby reducing environmental pollution.

[0004] The technical solution of this utility model is as follows: a door frame side frame lock hole opening device, including a frame, a drilling mechanism, a conveying mechanism, a lifting mechanism, a pressing mechanism, and a chip removal mechanism. The frame is provided with a track on the outside, the drilling mechanism is slidably connected to the track, the output end of the drilling mechanism faces downward, the chip removal mechanism is installed on the drilling mechanism, the frame is provided with two fixed plates and two supports, one in front and one behind, the two supports are located between the two fixed plates, the pressing mechanism is installed on the fixed plate, the output end of the pressing mechanism extends horizontally above the supports, the lifting mechanism is installed on the frame between the two supports, the output end of the lifting mechanism faces upward and is fixedly connected to the side of the conveying mechanism, the upper surface of the support is higher than the upper surface of the fixed plate, the chip removal mechanism faces the support, and the upper surface of the conveying mechanism can move up and down over the upper surface of the support.

[0005] Furthermore, the drilling mechanism includes a movable worktable and a milling assembly. The movable worktable is slidably connected to a track, and the milling assembly is mounted on the movable worktable with its output end facing downwards.

[0006] Furthermore, the chip removal mechanism includes a first chip collection box and a second chip collection box, both of which are mounted on a movable worktable. The inlet of the first chip collection box faces downward, and the output end of the milling component passes downward through the inlet of the first chip collection box. The inlet of the second chip collection box faces downward towards the first chip collection box.

[0007] Furthermore, the movable worktable is equipped with an auxiliary cylinder, the output end of which faces downward and is fixedly connected to the first chip collection box. The upper end of the first chip collection box is provided with a through hole, the position of which corresponds to the inlet of the first chip collection box. The output end of the milling component passes downward through the through hole and the inlet of the first chip collection box.

[0008] Furthermore, it also includes a spring and a movable column. Movable holes are provided on both sides of the through hole. The movable column is slidably connected in the movable holes. Limiting blocks are provided at both the upper and lower ends of the movable column. The output end of the auxiliary cylinder is connected to the limiting block at the upper end of the movable column. The spring is sleeved on the movable column and elastically connected between the limiting block at the upper end of the movable column and the upper surface of the first chip collection box.

[0009] Furthermore, a sponge pad is provided at the lower end of the first chip collection box, and the sponge pad surrounds the outside of the inlet of the first chip collection box.

[0010] Furthermore, the lower end of the first chip collection box is provided with multiple spherical cavities, and a rolling ball is provided in the spherical cavity. The lower end of the rolling ball is located between the lower end surface of the first chip collection box and the lower end surface of the sponge pad layer.

[0011] Furthermore, the conveying mechanism includes a drive assembly and two conveyor belts. The output end of the lifting mechanism faces upward and is fixedly connected to the sides of the two conveyor belts respectively. The drive assembly is installed between the two conveyor belts, and the output end of the drive assembly is connected to the two conveyor belts for transmission.

[0012] Furthermore, the lifting mechanism includes a lifting cylinder and a connecting plate. The lifting cylinder is mounted on the frame between two supports, with its output end facing upward and connected to the connecting plate. The side of the connecting plate is fixedly connected to the side of the conveying mechanism.

[0013] Furthermore, the pressing mechanism includes a pressing cylinder and a pressure plate. The pressing cylinder is mounted on a fixed plate, and the output end of the pressing cylinder is fixedly connected to the pressure plate. The pressure plate extends horizontally above the bracket.

[0014] Furthermore, the upper end of the bracket is provided with a groove.

[0015] Furthermore, it also includes a positioning mechanism, which is mounted on the frame. The output end of the positioning mechanism faces upward and is provided with two positioning posts, which can extend upward to above the conveying mechanism.

[0016] Furthermore, it also includes a distance adjustment mechanism, which is mounted on the frame, and a positioning mechanism is mounted on the distance adjustment mechanism. The positioning mechanism can move laterally on the frame through the distance adjustment mechanism.

[0017] Furthermore, the adjusting mechanism includes a support, a slide bar, a slide plate, and a lead screw. There are two supports, each mounted on the frame. The two ends of the slide bar are fixedly connected to the two supports, and the two ends of the lead screw are rotatably connected to the two supports. There are two slide bars located on both sides of the lead screw. The side of the slide plate is provided with a threaded hole and two sliding holes. The lead screw is connected to the slide plate through the threaded hole, and the slide bar is slidably connected to the slide plate through the sliding holes. The positioning mechanism is mounted on the slide plate.

[0018] Furthermore, a handle is provided at one end of the lead screw.

[0019] Compared with the prior art, the advantages of this utility model are as follows: the chip removal mechanism can move with the drilling mechanism, and collect and discharge the wood chips and dust generated during drilling to avoid environmental pollution; by setting components such as springs and movable columns, the force of the auxiliary cylinder is prevented from acting directly on the door frame side frame, and the relative movement and large friction between the first chip collection box and the door frame side frame when the moving worktable drives the milling assembly to move will prevent wear of the door frame side frame. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is the front view of the present invention;

[0023] Figure 3 for Figure 2 Enlarged structural schematic diagram at point A in the middle;

[0024] Figure 4 This is a top view of the structure of the first chip collection box of this utility model;

[0025] Figure 5 This is a structural schematic diagram of the first chip collection box of this utility model from a bottom view.

[0026] Figure 6 This is a top view of the present invention.

[0027] The components include: 1. Frame; 101. Track; 2. Fixed plate; 3. Bracket; 301. Groove; 4. Moving worktable; 5. Milling assembly; 6. Lifting cylinder; 7. Connecting plate; 8. Conveyor belt; 9. Drive assembly; 10. Pressing cylinder; 11. Pressure plate; 12. Positioning mechanism; 13. Positioning column; 14. Slide plate; 15. Support; 16. Slide rod; 17. Lead screw; 18. Handle; 19. First chip collection box; 1901. Through hole; 1902. Inlet of the first chip collection box; 1903. Movable hole; 1904. Spherical cavity; 20. Second chip collection box; 21. Auxiliary cylinder; 22. Movable rod; 23. Limiting block; 24. Spring; 25. Sponge pad; 26. Rolling ball. Detailed Implementation

[0028] To further illustrate the technical means and effects of this utility model in achieving its intended purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0029] like Figure 1-6 As shown, a door frame side frame lock hole drilling device includes a frame 1, a drilling mechanism, a conveying mechanism, a lifting mechanism, a pressing mechanism, and a chip removal mechanism. A track 101 is provided on the outer side of the frame 1. The drilling mechanism is slidably connected to the track 101 and can move in the X, Y, and Z directions. The output end of the drilling mechanism faces downwards, allowing it to drill holes in the door frame side frame. The chip removal mechanism is installed on the drilling mechanism to remove sawdust and dust generated during drilling. The frame 1 has two fixed plates 2 (one in front of the other) and two supports 3 (one behind the other). The two supports 3 are located between the two fixed plates 2. The pressing mechanism is installed on the fixed plates 2, and its output end extends horizontally to the supports. Above the support 3, the door frame side frame located on the support 3 can be pressed down to prevent it from deviating; the lifting mechanism is installed on the frame 1 between the two supports 3, the output end of the lifting mechanism faces upward and is fixedly connected to the side of the conveying mechanism, the lifting mechanism can lift or lower the conveying mechanism, the upper end surface of the support 3 is higher than the upper end surface of the fixed plate 2, the two supports 3 are used to support the door frame side frame, the chip removal mechanism faces the support 3 and can be aligned with the drilling operation position, the upper end surface of the conveying mechanism can move up and down over the upper end surface of the support 3, in this way the door frame side frame located on the support 3 can be lifted, or the door frame side frame located on the conveying mechanism can be placed on the support 3, forming the transfer and handover of the door frame side frame.

[0030] In the above embodiment, the drilling mechanism includes a movable worktable 4 and a milling assembly 5. The movable worktable 4 is slidably connected to the track 101, and the milling assembly 5 is mounted on the movable worktable 4. The movable worktable 4 can move the milling assembly 5 to a specific position. The output end of the milling assembly 5 faces downward, and the output end of the milling assembly 5 is generally a milling cutter, which can be used for milling grooves and opening holes on the side frame of the door frame. The chip removal mechanism includes a first chip collection box 19 and a second chip collection box 20. Both the first chip collection box 19 and the second chip collection box 20 are mounted on the movable worktable 4. The inlet of the first chip collection box 19 faces downward, and the output end of the milling assembly 5 passes downward through the inlet of the first chip collection box 19. The inlet of the second chip collection box 20 faces downward towards the first chip collection box 19. The first chip collection box 19 and the second chip collection box 20 perform chip removal operations above and to the side of the milling operation area, respectively, making chip removal more comprehensive and effective. The movable workbench 4 is equipped with an auxiliary cylinder 21. The output end of the auxiliary cylinder 21 faces downward and is fixedly connected to the first chip collection box 19. The upper end of the first chip collection box 19 is provided with a through hole 1901, and the position of the through hole 1901 corresponds to the inlet of the first chip collection box 19. The output end of the milling component 5 passes downward through the through hole 1901 and the inlet of the first chip collection box 19. When the first chip collection box 19 is performing chip removal operation, the auxiliary cylinder 21 pushes the first chip collection box 19 down and sticks it to the surface of the door frame side frame to ensure that the wood chips enter the first chip collection box 19 as much as possible.

[0031] This device also includes a spring 24 and a movable column. Movable holes 1903 are provided on both sides of the through hole 1901. The movable column is slidably connected in the movable holes 1903. Limiting blocks 23 are provided at the upper and lower ends of the movable column. The output end of the auxiliary cylinder 21 is connected to the limiting block 23 at the upper end of the movable column. The spring 24 is sleeved on the movable column and elastically connected between the limiting block 23 at the upper end of the movable column and the upper end face of the first chip collection box 19. When the first chip collection box 19 abuts against the door frame side frame downwards, the continued pushing out of the auxiliary cylinder 21 will cause the movable column to slide downwards along the movable hole 1903, thereby compressing the spring 24. The positive pressure between the first chip collection box 19 and the door frame side frame mainly comes from the reaction force of the spring 24, which avoids the force of the auxiliary cylinder 21 from acting directly on the door frame side frame. This prevents the relative movement and large friction between the first chip collection box 19 and the door frame side frame when the moving worktable 4 drives the milling assembly 5 to move, thus preventing wear of the door frame side frame. The lower end of the first debris collection box 19 is provided with a sponge pad 25, which surrounds the outside of the entrance of the first debris collection box 19. The sponge pad 25 can not only deform appropriately and absorb part of the reaction force released by the spring 24, but also play a sealing role. It is equivalent to using the soft connection between the sponge pad 25 and the side frame of the door frame to replace the hard connection between the first debris collection box 19 and the side frame of the door frame. Since the sponge pad 25 has a certain degree of breathability, it will sacrifice a small part of the negative pressure suction. Therefore, a sponge with high density, low breathability and a certain degree of toughness needs to be used. The first chip collection box 19 has multiple spherical cavities 1904 at its lower end. Each spherical cavity 1904 contains a rolling ball 26. The lower end of the rolling ball 26 is located between the lower end face of the first chip collection box 19 and the lower end face of the sponge pad 25. After the sponge pad 25 is continuously compressed, the rolling ball 26 will abut against the upper surface of the door frame side frame, providing support and limiting for the first chip collection box 19, preventing the sponge pad 25 from being over-compressed. After the sponge pad 25 has been used and worn for a long time, it can also provide a safe limit for the first chip collection box 19, preventing the first chip collection box 19 from directly abutting against the door frame side frame.

[0032] The conveying mechanism includes a drive assembly 9 and two conveyor belts 8. The output end of the lifting mechanism faces upward and is fixedly connected to the sides of the two conveyor belts 8 respectively. The drive assembly 9 is installed between the two conveyor belts 8, and its output end is connected to the two conveyor belts 8 for transmission. Using the same drive assembly 9 enables the two conveyor belts 8 to operate synchronously, avoiding the door frame side frame from swaying and shifting due to the speed difference between the two conveyor belts 8, thus saving the correction mechanism in traditional equipment. The space between the two conveyor belts 8 is hollow, providing ample space for cleaning and maintenance of the device, and facilitating the inspection and repair of various components within the device. The lifting mechanism includes a lifting cylinder 6 and a connecting plate 7. The lifting cylinder 6 is installed on the frame 1 between the two supports 3, with its output end facing upward and connected to the connecting plate 7. The side of the connecting plate 7 is fixedly connected to the side of the conveying mechanism. When the lifting cylinder 6 pushes upward, the two conveyor belts 8 lift together, lifting and moving the door frame side frame located on the support 3. The pressing mechanism includes a pressing cylinder 10 and a pressure plate 11. The pressing cylinder 10 is mounted on the fixed plate 2, and its output end is fixedly connected to the pressure plate 11. The pressure plate 11 extends horizontally above the bracket 3. When the door frame side frame is placed on the bracket 3, the pressing cylinder 10 and the pressure plate 11 can press the door frame side frame downward to prevent it from shifting during milling. The upper end of the bracket 3 is provided with a groove 301 to provide safety for the milling operation and prevent the milling cutter of the milling assembly 5 from damaging the bracket 3 when it drills downward.

[0033] The device also includes a positioning mechanism 12, which is mounted on the frame 1. The output end of the positioning mechanism 12 faces upward and is provided with two positioning posts 13. The two positioning posts 13 can extend upward to above the conveyor belt 8. When the two conveyor belts 8 transport the door frame side frame to the device, the two positioning posts 13 can be used for positioning and correction to ensure that the door frame side frame is in the correct position, thereby ensuring that the lock hole opening position is accurate.

[0034] This device also includes an adjusting mechanism, which is mounted on the frame 1. A positioning mechanism 12 is mounted on the adjusting mechanism. The positioning mechanism 12 can be moved laterally on the frame 1 through the adjusting mechanism, and the lateral position of the positioning pin 13 can be adjusted through the adjusting mechanism, thereby adjusting the opening position of the lock hole. The adjusting mechanism includes a support 15, a slide rod 16, a slide plate 14, and a lead screw 17. There are two supports 15, each mounted on the frame 1. The two ends of the slide rod 16 are fixedly connected to the two supports 15, and the two ends of the lead screw 17 are rotatably connected to the two supports 15. There are two slide rods 16 located on both sides of the lead screw 17. The slide plate 14 has a threaded hole and two sliding holes on its side. The lead screw 17 is connected to the slide plate 14 through the threaded hole, and the slide rod 16 is slidably connected to the slide plate 14 through the sliding holes. The positioning mechanism 12 is mounted on the slide plate 14. By rotating the lead screw 17, the position of the slide plate 14 can be adjusted, thereby adjusting the position of the two positioning pins 13, and thus finely adjusting the position of the lock block. One end of the lead screw 17 is provided with a handle 18 for easy manual adjustment.

[0035] Description of the working principle of this utility model:

[0036] The side frame of the door frame to be processed is transferred from an external transfer device to the two conveyor belts 8 of this device. Under the joint support of the two conveyor belts 8, the side frame of the door frame slowly moves forward to the processing position in the middle of the device. At this time, the two positioning columns 13 rise to provide positioning for the side frame of the door frame. After the side frame of the door frame is in place, the two conveyor belts 8 stop conveying, the two positioning columns 13 return to their original position, the lifting cylinder 6 retracts downward, and the side frame of the door frame is supported by the bracket 3. Immediately afterwards, the pressing cylinder 10 pulls the pressure plate 11 to press down on the side frame of the door frame. The movable worktable 4 moves the milling assembly 5 above the opening position. The auxiliary cylinder 21 pushes the first chip collection box 19 downward to abut against the door frame side frame. The milling cutter at the output end of the milling assembly 5 passes through the through hole 1901 and the inlet of the first chip collection box 19 to perform drilling and milling operations on the lock hole position of the door frame side frame. At the same time, the first chip collection box 19 and the second chip collection box 20 are connected to an external negative pressure device through pipes to remove the wood chips and dust generated during drilling and milling operations, preventing the accumulation of wood chips and dust and environmental pollution. After the lock block is processed, the first chip collection box 19 and the milling assembly 5 are removed, the pressure plate 11 releases the door frame side frame, and the two conveyor belts 8 rise and support the door frame side frame, allowing the door frame side frame to be transported away.

[0037] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A door frame jamb lock hole opening device, comprising a rack, a drilling mechanism, a conveying mechanism, a lifting mechanism, a pressing mechanism and a chip removal mechanism, characterized in that: The rack is externally provided with a track, a drilling mechanism is slidingly connected to the track, an output end of the drilling mechanism faces downward, a chip removal mechanism is installed on the drilling mechanism, the rack is provided with a front fixed plate and a rear fixed plate and two supports, the two supports are located between the two fixed plates, a pressing mechanism is installed on the fixed plate, an output end of the pressing mechanism horizontally extends above the support, a lifting mechanism is installed on the rack between the two supports, an output end of the lifting mechanism faces upward and is fixedly connected to a side surface of the conveying mechanism, an upper end surface of the support is higher than an upper end surface of the fixed plate, the chip removal mechanism faces the support, and an upper end surface of the conveying mechanism can move up and down to pass over the upper end surface of the support.

2. The doorframe jamb lock aperture opening device of claim 1, wherein: The drilling mechanism comprises a moving table and a milling assembly, the moving table is slidingly connected to the track, the milling assembly is installed on the moving table, and an output end of the milling assembly faces downward, and an upper end of the support is provided with a groove.

3. A doorframe jamb lock aperture opening device according to claim 2, characterised in that: The chip removal mechanism comprises a first chip collection box and a second chip collection box, the first chip collection box and the second chip collection box are both installed on the moving table, an inlet of the first chip collection box faces downward, the output end of the milling assembly passes downward through the inlet of the first chip collection box, and an inlet of the second chip collection box faces downward below the first chip collection box.

4. A doorframe jamb lock aperture opening device according to claim 3, characterised in that: An auxiliary cylinder is arranged in the moving table, an output end of the auxiliary cylinder faces downward and is fixedly connected to the first chip collection box, an upper end of the first chip collection box is provided with a through hole, the through hole is located in correspondence with the inlet of the first chip collection box, and the output end of the milling assembly passes downward through the through hole and the inlet of the first chip collection box.

5. A doorframe jamb lock aperture opening device according to claim 4, characterised in that: A spring and a movable column are further arranged, both sides of the through hole are provided with movable holes, the movable column is slidingly connected to the movable holes, limit blocks are arranged at upper and lower ends of the movable column, the output end of the auxiliary cylinder is connected to the limit block at the upper end of the movable column, the spring is sleeved on the movable column, and the spring is elastically connected between the limit block at the upper end of the movable column and an upper end surface of the first chip collection box.

6. A doorframe jamb lock aperture opening device according to claim 5, wherein: The lower end of the first chip collection box is provided with a sponge pad layer, the sponge pad layer surrounds the outside of the inlet of the first chip collection box, the lower end of the first chip collection box is provided with a plurality of spherical cavities, a rolling ball is arranged in each spherical cavity, and lower ends of the rolling balls are located between a lower end surface of the first chip collection box and a lower end surface of the sponge pad layer.

7. The doorframe jamb lock aperture opening device according to claim 1, wherein: The conveying mechanism comprises a driving assembly and two conveying belts, the output end of the lifting mechanism faces upward and is fixedly connected to side surfaces of the two conveying belts, the driving assembly is installed between the two conveying belts, output ends of the driving assembly are in transmission connection with the two conveying belts respectively, the lifting mechanism comprises a lifting cylinder and a connecting plate, the lifting cylinder is installed on the rack between the two supports, an output end of the lifting cylinder faces upward and is connected to the connecting plate, and the connecting plate is fixedly connected to side surfaces of the conveying mechanism.

8. The doorframe jamb lock aperture opening device according to claim 1, wherein: The pressing mechanism comprises a pressing cylinder and a pressing plate, the pressing cylinder is installed on the fixed plate, an output end of the pressing cylinder is fixedly connected to the pressing plate, and the pressing plate horizontally extends above the support.

9. The doorframe jamb lock aperture opening device according to claim 1, wherein: A positioning mechanism is further arranged on the rack, an output end of the positioning mechanism faces upward and is provided with two positioning columns, and the two positioning columns can extend upward above the conveying mechanism.

10. The doorframe jamb lock aperture opening device according to claim 1, wherein: The adjusting distance mechanism is installed on the frame, the positioning mechanism is installed on the adjusting distance mechanism, the positioning mechanism can be transversely moved on the frame through the adjusting distance mechanism, the adjusting distance mechanism comprises a support, a sliding rod, a sliding plate and a screw rod, the support is provided with two and is respectively installed on the frame, the sliding rod is fixedly connected to the two supports at two ends, the screw rod is rotatably connected to the two supports at two ends, the sliding rod is provided with two and is located at two sides of the screw rod, the sliding plate is provided with a threaded hole and two sliding holes in the side surface, the screw rod is in transmission connection with the sliding plate through the threaded hole, the sliding rod is in sliding connection with the sliding plate through the sliding hole, the positioning mechanism is installed on the sliding plate, and one end of the screw rod is provided with a handle.