Low-cost processing machine tool
By using front and rear shifting and lifting mechanisms in the processing machine tools, the problems of large size, high cost and vibration noise of traditional machine tools are solved, and the effect of low-cost and stable feeding is achieved.
Patent Information
- Application Number
- CN202422179499.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-05
AI Technical Summary
The feeding devices of traditional processing machine tools use longitudinal and transverse sliding tables, which leads to large volume and high cost of the machine tool, and is prone to vibration and noise during feeding.
The front and rear displacement mechanism and the lifting mechanism are adopted to realize feeding through the movement of the front and rear ply plates, reducing the participation of the sliding table and avoiding the use of the longitudinal sliding table.
It effectively reduces the cost and volume of the processing machine tool, reduces vibration and noise during the feeding process, and improves the stability of the feeding.
Smart Images

Figure CN223044105U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of processing machine tools, in particular to a low-cost processing machine tool. Background Art
[0002] A processing machine tool refers to a machine tool that can process workpieces. During the actual processing process, a long bar-shaped blank needs to be transferred to the position where the tool of the processing machine tool is located. After processing, it is then cut into small segments of the actual required products. In this case, it is necessary to cut each small segment from the blank after each small segment is processed. If the next processing is required, the remaining blank needs to be conveyed to the position where the tool is located by the feeding device on the processing machine tool, thus repeating continuously between processing and feeding.
[0003] The feeding device of the traditional processing machine tool is arranged on the longitudinal slide, and the longitudinal slide is arranged on the transverse slide. The transverse slide can realize the left and right movement of the feeding device, and the longitudinal slide can realize the front and back movement of the feeding device. During the actual processing process, the feeding device can be moved to the position corresponding to the tool through the transverse slide, and then the blank is fed again and again by the longitudinal slide. The slide is an existing mechanical slide, which not only has a large volume, easily leads to an overly large overall volume of the processing machine tool and occupies a lot of space, but also has a high cost and is not conducive to market popularization. At the same time, the mechanical slide itself has a large weight, and vibrations and noises will inevitably occur during each movement, and a large amount of energy will be consumed. Summary of the Invention
[0004] The technical problem to be solved by the utility model is to provide a low-cost processing machine tool, which can not only ensure the stable progress of the feeding work, but also effectively reduce the cost, reduce the actual volume of the processing machine tool, and avoid vibrations and noises generated during each feeding.
[0005] The technical solution adopted by the utility model to solve the above technical problems is as follows:
[0006] The utility model discloses a low-cost processing machine tool, which includes a machine body, a transverse slide table arranged at the front part of the upper surface of the machine body, a processing table arranged at the rear part of the upper surface of the machine body, several cutting tools on the processing table, and a protective cover covering above the machine body. A fixed seat is arranged on the upper surface of the middle part of the transverse slide table; a lifting mechanism matching with the fixed seat is arranged on the fixed seat; the lifting mechanism includes a lifting table matching with the fixed seat; a front fixed clamping plate and a front movable clamping plate opposite to the front fixed clamping plate are arranged on the outer wall at the rear side of the upper end of the lifting table; the front movable clamping plate is connected with a front clamping mechanism matching with it, and the front clamping mechanism can make the front movable clamping plate move close to the front fixed clamping plate; a front-back displacement mechanism is arranged on the outer wall at the right side of the lifting table; the front-back displacement mechanism is connected with a rear fixed clamping plate located directly behind the front fixed clamping plate; a rear clamping mechanism is arranged at the left side of the rear part of the front-back displacement mechanism; the rear clamping mechanism is connected with a rear movable clamping plate opposite to the rear fixed clamping plate, and the rear clamping mechanism can make the rear movable clamping plate move close to the rear fixed clamping plate.
[0007] The front clamping mechanism includes a front clamping seat arranged on the outer wall at the rear side of the lifting table; the front fixed clamping plate is arranged on the left side of the upper surface of the front clamping seat; the front movable clamping plate is located on the right side of the front fixed clamping plate; several front telescopic holes are arranged at the lower part of the front fixed clamping plate; several front telescopic arms matching with the front telescopic holes are arranged on the left side wall at the lower part of the front movable clamping plate, and the left end of the front telescopic arm passes through the corresponding front telescopic hole to the left; a front air cylinder mounting plate is arranged on the lower surface of the front clamping seat; a front air cylinder matching with it is arranged on the left side wall of the front air cylinder mounting plate; the left end of the piston rod of the front air cylinder is hinged with a front swing arm; the upper end of the front swing arm is hinged with the left end of the front telescopic arm.
[0008] A front sliding groove matching with the lower part of the front movable clamping plate is arranged on the upper surface of the front clamping seat; the right slot opening of the front sliding groove is located on the right side wall of the front clamping seat.
[0009] The front-back displacement mechanism includes a fixing plate arranged at the middle part of the rear side wall of the lifting table; a guide rail seat located on the right side of the lifting table is arranged at the right end of the fixing plate; mutually symmetrical first guide rails are arranged on the upper and lower sides of the guide rail seat; an upper sliding plate is arranged above the guide rail seat, and a lower sliding plate is arranged below the guide rail seat; first sliders matching with the first guide rails are arranged on the lower surface of the upper sliding plate and the upper surface of the lower sliding plate; both between the left end of the upper sliding plate and the left end of the lower sliding plate and between the right end of the upper sliding plate and the right end of the lower sliding plate are connected by a connecting plate; a displacement air cylinder mounting plate is arranged at the front end of the guide rail seat; a displacement air cylinder matching with it is arranged on the displacement air cylinder mounting plate; a shell fixed with the upper sliding plate is arranged outside the upper sliding plate, and the rear end of the piston rod of the displacement air cylinder is arranged on the rear inner wall of the shell.
[0010] The rear clamping mechanism includes a rear clamping seat provided at the left rear of the upper surface of the upper slide plate; the rear fixed clamping plate is provided on the left side of the upper surface of the rear clamping seat; several rear telescopic holes are provided at the lower part of the rear fixed clamping plate; several rear telescopic arms matching the rear telescopic holes are provided on the left side wall of the lower end of the rear clamping seat, and the left end of the rear telescopic arm passes through the corresponding rear telescopic hole to the left; a rear air cylinder is provided on the left side wall of the connecting plate between the left end of the upper slide plate and the left end of the lower slide plate; the left end of the piston rod of the rear air cylinder is hinged with a rear swing arm; the upper end of the rear swing arm is hinged with the left end of the rear telescopic arm.
[0011] A rear sliding groove matching the lower part of the rear movable clamping plate is provided on the upper surface of the rear clamping seat; the right notch of the rear sliding groove is located on the right side wall of the rear clamping seat.
[0012] The lifting mechanism includes a lifting air cylinder mounting plate provided on the lower surface at the front end of the fixed seat; a lifting air cylinder matching the lifting air cylinder mounting plate is provided on the lifting air cylinder mounting plate; a lifting hole is provided at the center of the lifting table; second guide rails which are symmetric to each other are provided on the left and right sides of the fixed seat; second sliders matching the second guide rails are provided on the inner walls on the left and right sides of the lifting hole; a housing matching the lifting table is sleeved outside the lifting table, and the housing and the lifting table are fixed by a plurality of uniformly distributed screws; the upper end of the piston rod of the lifting air cylinder is provided on the inner wall on the upper side of the housing.
[0013] The beneficial effects of the present utility model are as follows:
[0014] Compared with the prior art, when the low-cost processing machine tool adopting the structure of the present utility model needs to automatically feed a strip-shaped blank backward, only the front and rear displacement mechanism drives the rear fixed clamping plate and the rear movable clamping plate to approach the tool. During the whole moving process, the transverse slide table, the fixed seat, the front fixed clamping plate and the front movable clamping plate do not need to move. To the greatest extent, the number of components involved in the backward movement of the strip-shaped blank is reduced, and the movement and noise generated during the backward movement are controlled within the smallest range. It can effectively avoid the situation of vibration and noise caused by the participation of the slide table in the backward movement process. Therefore, it can be seen that during the whole backward movement process, the longitudinal slide table does not need to participate. With the removal of the longitudinal slide table, the actual cost of the processing machine tool can be effectively reduced, and at the same time, the volume of the processing machine tool can be reduced, and the occupied space can be reduced. Description of the Drawings
[0015] Figure 1 is a schematic structural diagram of the low-cost processing machine tool of the present utility model;
[0016] Figure 2 is a schematic structural diagram of the low-cost processing machine tool of the present utility model after removing the protective cover;
[0017] Figure 3 is a schematic structural diagram of a partial angle of the low-cost processing machine tool of the present utility model;
[0018] Figure 4 It is a schematic structural view of another angle of a part of the low-cost processing machine tool of the present utility model. Specific embodiments
[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:
[0020] Please refer to Figures 1 to 4 , the present utility model provides a low-cost processing machine tool, including a machine body 1, a transverse slide 2 provided at the front of the upper surface of the machine body 1, a processing table 3 provided at the rear of the upper surface of the machine body 1, a plurality of cutting tools 4 on the processing table 3, a protective cover 5 covering the upper part of the machine body 1, and a fixed seat 6 provided on the upper surface of the middle part of the transverse slide 2; a lifting mechanism matching with the fixed seat 6 is provided on the fixed seat 6; the lifting mechanism includes a lifting table 7 matching with the fixed seat 6; a front fixed clamping plate 8 and a front movable clamping plate 9 opposite to the front fixed clamping plate 8 are provided on the outer wall of the upper rear side of the lifting table 7; the front movable clamping plate 9 is connected with a front clamping mechanism matching with it, and the front clamping mechanism can make the front movable clamping plate 9 move closer to the front fixed clamping plate 8; a front-back displacement mechanism is provided on the outer wall of the right side of the lifting table 7; the front-back displacement mechanism is connected with a rear fixed clamping plate 10 located directly behind the front fixed clamping plate 8; a rear clamping mechanism is provided on the left side of the rear part of the front-back displacement mechanism; the rear clamping mechanism is connected with a rear movable clamping plate 11 opposite to the rear fixed clamping plate 10, and the rear clamping mechanism can make the rear movable clamping plate 11 move closer to the rear fixed clamping plate 10.
[0021] The front clamping mechanism includes a front clamping seat 12 provided on the outer wall of the rear side of the lifting table 7; the front fixed clamping plate 8 is provided on the left side of the upper surface of the front clamping seat 12; the front movable clamping plate 9 is located on the right side of the front fixed clamping plate 8; a plurality of front telescopic holes 13 are provided at the lower part of the front fixed clamping plate 8; a plurality of front telescopic arms 14 matching with the front telescopic holes 13 are provided on the left side wall of the lower part of the front movable clamping plate 9, and the left end of the front telescopic arm 14 passes through the corresponding front telescopic hole 13 to the left; a front cylinder mounting plate 15 is provided on the lower surface of the front clamping seat 12; a front cylinder 16 matching with the left side wall of the front cylinder mounting plate 15 is provided; the left end of the piston rod of the front cylinder 16 is hinged with a front swing arm 17; the upper end of the front swing arm 17 is hinged with the left end of the front telescopic arm 14.
[0022] A front chute 18 matching with the lower part of the front movable clamping plate 9 is provided on the upper surface of the front clamping seat 12; the right slot opening of the front chute 18 is located on the right side wall of the front clamping seat 12.
[0023] The front-back displacement mechanism includes a fixing plate provided in the middle of the rear side wall of the lifting table 7; a guide rail base 20 located on the right side of the lifting table 7 is provided at the right end of the fixing plate; symmetrical first guide rails 21 are provided on the upper and lower sides of the guide rail base 20; an upper slide plate 22 is provided above the guide rail base 20, and a lower slide plate 23 is provided below the guide rail base 20; first sliders 24 matching the first guide rails 21 are provided on the lower surface of the upper slide plate 22 and the upper surface of the lower slide plate 23; the left ends and the right ends between the upper slide plate 22 and the lower slide plate 23 are connected by a connecting plate 25; a displacement cylinder mounting plate 26 is provided at the front end of the guide rail base 20; a displacement cylinder 27 matching the displacement cylinder mounting plate 26 is provided on the displacement cylinder mounting plate 26; a housing 28 fixed to the upper slide plate 22 is provided outside the upper slide plate 22, and the rear end of the piston rod of the displacement cylinder 27 is provided on the rear inner wall of the housing 28.
[0024] The rear clamping mechanism includes a rear clamping seat 29 provided at the left rear of the upper surface of the upper slide plate 22; the rear fixed clamping plate 10 is provided on the left side of the upper surface of the rear clamping seat 29; a number of rear telescopic holes 30 are provided at the lower part of the rear fixed clamping plate 10; a number of rear telescopic arms 31 matching the rear telescopic holes 30 are provided on the left side wall of the lower end of the rear clamping seat 29, and the left ends of the rear telescopic arms 31 pass through the corresponding rear telescopic holes 30 to the left; a rear cylinder 32 is provided on the left side wall of the connecting plate 25 between the left ends of the upper slide plate 22 and the lower slide plate 23; the left end of the piston rod of the rear cylinder 32 is hinged with a rear swing arm 33; the upper end of the rear swing arm 33 is hinged with the left end of the rear telescopic arm 31.
[0025] A rear chute 34 matching the lower part of the rear movable clamping plate 11 is provided on the upper surface of the rear clamping seat 29; the right slot opening of the rear chute 34 is located on the right side wall of the rear clamping seat 29.
[0026] The lifting mechanism includes a lifting cylinder mounting plate 35 provided on the lower surface of the front end of the fixed seat 6; a lifting cylinder 36 matching the lifting cylinder mounting plate 35 is provided on the lifting cylinder mounting plate 35; a lifting hole 37 is provided at the center of the lifting table 7; symmetrical second guide rails 38 are provided on the left and right sides of the fixed seat 6; second sliders 39 matching the second guide rails 38 are provided on the inner walls on the left and right sides of the lifting hole 37; a housing 40 matching the lifting table 7 is provided outside the lifting table 7, and the housing 40 and the lifting table 7 are fixed by a number of uniformly distributed screws; the upper end of the piston rod of the lifting cylinder 36 is provided on the upper inner wall of the housing 40.
[0027] The usage method of the present utility model is as follows:
[0028] When the bar stock is initially loaded, it is placed between the front fixed clamping plate 8 and the front movable clamping plate 9, and between the rear fixed clamping plate 10 and the rear movable clamping plate 11. At this time, the piston rod of the front cylinder 16 drives the lower end of the front swing arm 17 to move rightward, and the piston rod of the rear cylinder 32 also drives the lower end of the rear swing arm 33 to move rightward. When the lower end of the front swing arm 17 moves rightward, the upper end of the front swing arm 17 will drive the front telescopic arm 14 to move leftward, making the front movable clamping plate 9 move leftward closer to the front fixed clamping plate 8, so that the front movable clamping plate 9 and the front fixed clamping plate 8 clamp the bar stock. When the lower end of the rear swing arm 33 moves rightward, the upper end of the rear swing arm 33 will drive the rear telescopic arm 31 to move leftward, making the rear movable clamping plate 11 move leftward closer to the rear fixed clamping plate 10, so that the rear movable clamping plate 11 and the rear fixed clamping plate 10 clamp the bar stock. At this time, the bar stock is fixed. Immediately afterwards, the transverse slide 2 can drive the bar stock to move left and right, so that the bar stock moves to the position corresponding to the cutter.
[0029] When it is necessary to automatically feed the bar stock backward, the front cylinder 16 can be started first, so that the piston rod of the front cylinder 16 drives the lower end of the front swing arm 17 to move leftward. At this time, the upper end of the front swing arm 17 drives the front telescopic arm 14 to move rightward, making the front movable clamping plate 9 move rightward away from the front fixed clamping plate 8. At this moment, the front fixed clamping plate 8 and the front movable clamping plate 9 no longer clamp the bar stock. Then the displacement cylinder 27 can be started, and the piston rod of the displacement cylinder 27 will push the inner wall of the rear side of the housing 28 backward, realizing the backward movement of the housing 28. The housing 28 and the upper slide plate 22, the lower slide plate 23 can be fixed by a number of evenly distributed screws. When the housing 28 moves backward, the upper slide plate 22 and the lower slide plate 23 move backward accordingly, so as to realize the backward movement of the connecting plate 25, and finally realize the synchronous backward movement of the rear fixed clamping plate 10, the rear movable clamping plate 11 and the rear cylinder 32. When the rear fixed clamping plate 10 and the rear movable clamping plate 11 move backward, the bar stock moves backward accordingly.
[0030] After the bar blank is moved backward to the actual processing position, the displacement cylinder 27 stops running. Immediately afterwards, the front cylinder 16 can be started again to make the front movable clamp 9 approach the front fixed clamp 8 again, clamping the bar blank again. Then, the rear cylinder 32 is started to drive the lower end of the rear swing arm 33 to move leftward by the piston rod of the rear cylinder 32, so that the upper end of the rear swing arm 33 drives the rear telescopic arm 31 to move rightward, making the rear movable clamp 11 move away from the rear fixed clamp 10. The rear fixed clamp 10 and the rear movable clamp 11 no longer clamp the bar blank. Immediately afterwards, the rear fixed clamp 10 and the rear movable clamp 11 move forward and reset under the action of the displacement cylinder 27. When the reset is completed, the rear fixed clamp 10 and the rear movable clamp 11 clamp the bar blank again under the action of the rear cylinder 32, ensuring that there are always two places where the bar blank is clamped and fixed during the processing of the rear end of the bar blank, thus effectively ensuring the stability during processing. This automatic feeding and processing method does not require a longitudinal slide table. Only by using the front and rear displacement mechanism can the bar blank be automatically moved backward. With the removal of the slide table in one direction, the actual cost of the processing machine tool can be effectively reduced, and at the same time, the volume of the processing machine can be reduced, and the occupied space can be reduced. The front and rear displacement mechanism mainly relies on the displacement cylinder, so there are fewer key components involved. When the bar blank is automatically fed backward, mainly the front fixed clamp and the rear fixed clamp move backward, minimizing the movement and noise during feeding to the greatest extent and avoiding the vibration and noise caused by the operation of the longitudinal slide table during each feeding.
[0031] On the upper surface of the front clamping seat 12, there is a front chute 18 that matches the lower part of the front movable clamp 9. The right slot opening of the front chute 18 is located on the right side wall of the front clamping seat 12. The existence of the front chute 18 can play a guiding role when the front movable clamp 9 moves, thus ensuring the stability when the front movable clamp 9 clamps or releases the bar blank with the front fixed clamp 8.
[0032] On the upper surface of the rear clamping seat 29, there is a rear chute 34 that matches the lower part of the rear movable clamp 11. The right slot opening of the rear chute 34 is located on the right side wall of the rear clamping seat 29. The existence of the rear chute 34 can play a guiding role when the rear movable clamp 11 moves, thus ensuring the stability when the rear movable clamp 11 clamps or releases the bar blank with the rear fixed clamp 10.
[0033] The lifting mechanism includes a lifting cylinder mounting plate 35 provided on the lower surface of the front end of the fixed seat 6. A lifting cylinder 36 that matches it is provided on the lifting cylinder mounting plate 35. A lifting hole 37 is provided at the center of the lifting table 7. Second guide rails 38 that are symmetric to each other are provided on the left and right sides of the fixed seat 6. Second sliding blocks 39 that match the second guide rails 38 are provided on the inner walls on the left and right sides of the lifting hole 37. The lifting table 7 is covered with a housing 40 that matches it. The upper end of the piston rod of the lifting cylinder 36 is provided on the inner wall of the upper side of the housing 40. When it is necessary to adjust the height of the strip blank, the lifting cylinder 36 can be started. When the piston rod of the lifting cylinder 36 moves up and down, the housing 40 can be driven to move up and down synchronously. The housing 40 and the lifting table 7 are fixed by a number of uniformly distributed screws. Therefore, when the housing 40 moves up and down, the lifting table 7 moves up and down synchronously. When the lifting table 7 moves up and down, the front fixed clamping plate 8, the front movable clamping plate 9, the rear fixed clamping plate 10, and the rear movable clamping plate 11 move up and down accordingly, so as to realize the adjustment of the height of the strip blank.
Claims
1. A low-cost processing machine tool, comprising a machine body, a transverse slide arranged on the front part of the upper surface of the machine body, a processing table arranged on the rear part of the upper surface of the machine body, a plurality of cutting tools arranged on the processing table, and a protective cover covering the upper part of the machine body, characterized in that: A fixed seat is provided on the upper surface of the middle part of the horizontal sliding table; a lifting mechanism matching it is provided on the fixed seat; the lifting mechanism includes a lifting platform matching the fixed seat; a front fixed clamping plate and a front movable clamping plate opposite to the front fixed clamping plate are provided on the rear outer wall of the upper end of the lifting platform; the front movable clamping plate is connected to a front clamping mechanism matching it, and the front clamping mechanism can move the front movable clamping plate closer to the front fixed clamping plate; a front-and-back shifting mechanism is provided on the right outer wall of the lifting platform; the front-and-back shifting mechanism is connected to a rear fixed clamping plate located directly behind the front fixed clamping plate; a rear clamping mechanism is provided on the left rear part of the front-and-back shifting mechanism; the rear clamping mechanism is connected to a rear movable clamping plate opposite to the rear fixed clamping plate, and the rear clamping mechanism can move the rear movable clamping plate closer to the rear fixed clamping plate.
2. A low-cost processing machine tool according to claim 1, characterized in that: The front clamping mechanism includes a front clamping seat arranged on the outer wall of the rear side of the lifting platform; the front fixed clamping plate is arranged on the left side of the upper surface of the front clamping seat; the front movable clamping plate is located on the right side of the front fixed clamping plate; a plurality of front telescopic holes are arranged at the lower part of the front fixed clamping plate; a plurality of front telescopic arms matching the front telescopic holes are arranged on the left side wall of the lower part of the front movable clamping plate, and the left end of the front telescopic arm passes through the corresponding front telescopic holes to the left; a front cylinder mounting plate is arranged on the lower surface of the front clamping seat; a front cylinder matching the front cylinder mounting plate is arranged on the left side wall; a front swing arm is hinged to the left end of the piston rod of the front cylinder; the upper end of the front swing arm is hinged to the left end of the front telescopic arm.
3. A low-cost processing machine tool according to claim 2, characterized in that: The upper surface of the front clamping seat is provided with a front sliding groove matching the lower part of the front movable clamping plate; the right notch of the front sliding groove is located on the right side wall of the front clamping seat.
4. A low-cost processing machine tool according to claim 1, characterized in that: The front-to-back shifting mechanism includes a fixed plate arranged in the middle of the rear side wall of the lifting platform; a guide rail seat located on the right side of the lifting platform is arranged at the right end of the fixed plate; first guide rails symmetrical to each other are arranged on the upper and lower sides of the guide rail seat; an upper slide plate is arranged above the guide rail seat, and a lower slide plate is arranged below the guide rail seat; a first sliding block matching the first guide rail is arranged on the lower surface of the upper slide plate and the upper surface of the lower slide plate; a connecting plate is used to connect the left end of the upper slide plate to the left end of the lower slide plate, and the right end of the upper slide plate to the right end of the lower slide plate; a shift cylinder mounting plate is arranged at the front end of the guide rail seat; a shift cylinder matching therewith is arranged on the shift cylinder mounting plate; the upper slide plate outer cover is provided with a shell fixed thereto, and the rear end of the piston rod of the shift cylinder is arranged on the rear inner wall of the shell.
5. A low-cost processing machine tool according to claim 4, characterized in that: The rear clamping mechanism includes a rear clamping seat arranged at the left rear of the upper surface of the upper slide plate; the rear fixed clamping plate is arranged on the left side of the upper surface of the rear clamping seat; a plurality of rear telescopic holes are arranged at the lower part of the rear fixed clamping plate; a plurality of rear telescopic arms matching the rear telescopic holes are arranged on the left side wall of the lower end of the rear clamping seat, and the left end of the rear telescopic arm passes through the corresponding rear telescopic hole to the left; a rear cylinder is arranged on the left side wall of the connecting plate between the left end of the upper slide plate and the left end of the lower slide plate; a rear swing arm is hinged to the left end of the piston rod of the rear cylinder; and the upper end of the rear swing arm is hinged to the left end of the rear telescopic arm.
6. A low-cost processing machine tool according to claim 5, characterized in that: The upper surface of the rear clamping seat is provided with a rear sliding groove matching the lower part of the rear movable clamping plate; the right notch of the rear sliding groove is located on the right side wall of the rear clamping seat.
7. A low-cost processing machine tool according to claim 1, characterized in that: The lifting mechanism includes a lifting cylinder mounting plate arranged on the lower surface of the front end of the fixed seat; a lifting cylinder matching the lifting cylinder is arranged on the lifting cylinder mounting plate; a lifting hole is arranged in the center of the lifting platform; second guide rails symmetrical to each other are arranged on the left and right sides of the fixed seat; second sliders matching the second guide rails are arranged on the inner walls on the left and right sides of the lifting hole; the lifting platform outer cover has an outer shell matching the lifting platform, and the outer shell and the lifting platform are fixed by a number of evenly distributed screws; the upper end of the piston rod of the lifting cylinder is arranged on the upper inner wall of the outer shell.