CN213784144U

CN213784144U - Chinese yam field punching and filling machine

Info

Publication number: CN213784144U
Application number: CN202022196376.8U
Authority: CN
Inventors: 张秀平; 徐志杰; 贺晓刚; 张亚振; 彭发智; 陈林; 贾海民; 范国昌; 田东亮; 任学军; 范沛沛; 高清海
Original assignee: Baoding Pengda Yam Professional Cooperative; Hebei Agricultural Mechanization Research Institute Co ltd; Institute of Plant Protection Hebei Academy of Agricultural and Forestry Sciences
Current assignee: Baoding Pengda Yam Professional Cooperative; Hebei Agricultural Mechanization Research Institute Co ltd; Institute of Plant Protection Hebei Academy of Agricultural and Forestry Sciences
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-07-27
Anticipated expiration: 2030-09-30

Abstract

The utility model relates to a chinese yam planting equipment technical field, the chinese yam field drilling filling machine is proposed, including the walking frame, elevating system, and the mechanism of punching, the mechanism of punching is including the seat of punching, and set up the perforating rod in the seat below of punching, be fixed with downwardly extending's locating lever at the seat front end of punching, be provided with spring and walking locating wheel at the seat rear of punching, the upper end and the mechanism of punching of spring are connected, the lower extreme is fixed with the support, the walking locating wheel forms normal rear of normal position pole with the support, the lower of walking locating wheel contacts with ground or is located the recess that the locating lever formed, be fixed with displacement sensor on the support, displacement sensor, a controller, the controlled end of walking frame connects gradually and forms the interval control mechanism who plants the hole. The walking positioning wheel is changed to stop the walking machine frame after walking at equal distance every time, so that the purpose of punching at equal intervals can be realized.

Description

Chinese yam field punching and filling machine

Technical Field

The utility model relates to a chinese yam planting equipment technical field, it is specific, relate to chinese yam field filling machine that punches.

Background

The dioscorea opposita contains various substances such as protein, arginine, vitamins, saccharides, mineral substances, mucus, starch and the like, has rich nutrition and health-care effect, and is popular with people. The existing dioscorea opposita adopts a punching cultivation mode. The existing punching machine comprises a walking frame, a lifting mechanism arranged at the front end of the walking frame and a punching mechanism fixed at the lower end of the lifting mechanism, wherein the walking frame advances for a certain distance and stops, the lifting mechanism drives the punching mechanism to descend for punching operation, after punching and planting holes, the lifting mechanism drives the punching mechanism to ascend and return to the initial position, then the walking frame advances for a certain distance and stops again, the lifting mechanism drives the punching mechanism to descend for punching operation again, and the operation is repeated. The mechanical operation saves time and labor, but the advancing distance of the walking frame is controlled by the operator according to subjective judgment, so the aim of punching at equal intervals cannot be fulfilled.

SUMMERY OF THE UTILITY MODEL

The utility model provides a dioscorea opposita field filling machine that punches has solved the problem that can't realize equidistant punching among the prior art, simple structure, convenient to use.

The technical scheme of the utility model as follows: ma chinese yam field drilling filling machine, including walking frame, setting at the elevating system of walking frame front end and fix the mechanism of punching at the elevating system lower extreme, walking frame and elevating system's controlled end all is connected with the controller, and the mechanism of punching includes the seat of punching and sets up the punching rod in the seat below of punching, and the key lies in: the positioning rod extending downwards is fixed to the front end of the punching seat, a spring and a walking positioning wheel are arranged behind the punching seat, the upper end of the spring is connected with the punching mechanism, a support is fixed to the lower end of the spring, the walking positioning wheel and the support form a rotating fit, the walking positioning wheel is located right behind the positioning rod, the lowest part of the walking positioning wheel is in contact with the ground or is located in a groove formed by the positioning rod, a displacement sensor is fixed on the support, the displacement sensor, a controller and a controlled end of a walking rack are sequentially connected to form an interval control mechanism for planting holes.

The punching filling machine further comprises a filling mechanism arranged at the rear of the punching mechanism, the filling mechanism comprises a cantilever fixedly connected with the lower end of the lifting mechanism, a material box with a walking supporting wheel arranged below and at the bottom of the cantilever, and a connecting arm in sliding fit with the cantilever, the lower end of the connecting arm is fixedly connected with the material box, the upper end of the connecting arm is fixedly connected with a limiting block arranged above the cantilever, the upper end of a spring is connected with the bottom of the material box, a filling opening matched with the punching rod is formed in a bottom plate of the material box, a material blocking plate is arranged in the material box, a blanking opening is formed in the material blocking plate, one end of the material blocking plate is connected with a horizontal telescopic mechanism fixed outside the material box, and the blanking opening has a horizontal movement freedom degree communicated with the filling opening or separated with the aid of the telescopic mechanism of the horizontal telescopic mechanism.

A bracket is fixed on the front end face of the material box, and a horizontal telescopic mechanism is fixed on the bracket.

The inside of workbin is separated into two at least blanking chambeies of arranging along the fore-and-aft direction with the help of the baffle, and the bottom in every blanking chamber all is provided with the filler hole, has seted up the slide with the corresponding position of striker plate on the baffle, and the baffle is along the width of fore-and-aft direction linear increase from top to bottom.

The punching filling machine further comprises an automatic telescopic mechanism which is fixed on the cantilever and connected with the controller, a positioning plate fixedly connected with the lower end of the automatic telescopic mechanism, and a poking rod fixed on the lower end face of the positioning plate, wherein the lower end of the poking rod penetrates through a through hole formed in a top plate of the material box and extends into the material box, the poking rod and the filling openings are arranged in a one-to-one correspondence manner, and the poking rod has the lifting freedom degree of being inserted into or separated from the filling openings with the help of the stretching of the automatic telescopic mechanism.

The punching and filling machine further comprises a reinforcing arm, the upper end of the reinforcing arm is fixedly connected with the cantilever, and the lower end of the reinforcing arm is fixedly connected with the lower end of the punching seat.

The positioning rods and the punching rods are arranged in a left-right staggered mode.

Elevating system includes preceding linking arm and the back linking arm that has the turning, and the opening of back linking arm is towards below, and the rear end of back linking arm is articulated with the walking frame, and the front end is articulated with the upper end of preceding linking arm, and the lower extreme and the seat fixed connection that punches of preceding linking arm, elevating system still include articulated back telescopic machanism between the corner of back linking arm and the walking frame and articulated preceding telescopic machanism between the front end of back linking arm and the preceding linking arm, and back telescopic machanism and preceding telescopic machanism's controlled end all are connected with the controller.

The utility model discloses a theory of operation and beneficial effect do: the punching device is characterized in that a positioning rod extending downwards is arranged at the front end of the punching seat, a spring and a walking positioning wheel are arranged behind the punching seat, the upper end of the spring is connected with the punching seat, a support is fixed at the lower end of the spring, the walking positioning wheel and the support form a rotating fit, and the walking positioning wheel is located right behind the positioning rod. When the punching machine works, the lifting mechanism is adjusted to enable the walking positioning wheel to be in contact with the ground, the punching rod is not in contact with the ground at the moment, when the lifting mechanism is adjusted to enable the punching rod to punch, the positioning rod is inserted into soil, a groove is formed in the ground, after punching is completed, the punching rod and the positioning rod both ascend and leave the ground, the walking frame drives the punching mechanism and the positioning rod to move forwards, the lowest part of the walking positioning wheel is in contact with the ground at the moment, the spring is compressed, when the walking positioning wheel reaches above the groove formed by the positioning rod, the spring extends, the walking positioning wheel and the support both move downwards, the lowest part of the walking positioning wheel enters the groove, the displacement sensor on the support sends a signal to the controller, the controller sends a signal to enable the walking frame to stop moving, the lifting mechanism drives the punching rod to descend to punch, the positioning rod forms the groove again, and after punching is completed on the ground, the punching rod and the positioning rod ascend again to leave the ground, the walking frame drives the punching mechanism and the positioning rod to move forwards, the walking positioning wheel is separated from the groove, the spring is compressed again, and the process is repeated. After the work is finished, the lifting mechanism is adjusted to ensure that the walking positioning wheel and the punching rod are not in contact with the ground. The punching mechanism has the advantages that the distance between the punching mechanism and the walking frame is equal when punching is performed at each time, the walking frame stops after walking at equal distance at each time through the change of the displacement of the walking positioning wheel, the purpose of punching at equal intervals can be achieved, the structure is simple, and the use is convenient.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the middle packing mechanism of the present invention.

In the figure: 1. the automatic material conveying device comprises a traveling rack, 2, a lifting mechanism, 2-1, a front connecting arm, 2-2, a rear connecting arm, 2-3, a rear telescopic mechanism, 2-4, a front telescopic mechanism, 3, a punching seat, 4, a punching rod, 5, a positioning rod, 6, a spring, 7, a traveling positioning wheel, 8, a support, 9, a filling mechanism, 9-1, a material box, 9-2, a material baffle plate, 9-3, a filling opening, 9-4, a blanking opening, 9-5, a traveling supporting wheel, 9-6, a partition plate, 10, a horizontal telescopic mechanism, 11, a cantilever, 12, an automatic telescopic mechanism, 13, a positioning plate, 14, a material poking rod, 15, a reinforcing arm, 16, a connecting arm, 17 and a limiting block.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

In the specific embodiment, as shown in fig. 1, the dioscorea opposita field punching and filling machine comprises a walking frame 1, a lifting mechanism 2 arranged at the front end of the walking frame 1, and a punching mechanism fixed at the lower end of the lifting mechanism 2, wherein the controlled ends of the walking frame 1 and the lifting mechanism 2 are both connected with a controller, the controller is a PLC programmable controller, the punching mechanism comprises a punching seat 3 and a punching rod 4 arranged below the punching seat 3, a positioning rod 5 extending downwards is fixed at the front end of the punching seat 3, a spring 6 and a walking positioning wheel 7 are arranged behind the punching seat 3, the upper end of the spring 6 is connected with the punching mechanism, a support 8 is fixed at the lower end, the walking positioning wheel 7 and the support 8 form a rotating fit, the walking positioning wheel 7 is positioned right behind the positioning rod 5, the lowest part of the walking positioning wheel 7 is in contact with the ground or is positioned in a groove formed by the positioning rod 5, a displacement sensor is fixed on the bracket 8, and the displacement sensor, the controller and the controlled end of the walking frame 1 are sequentially connected to form a spacing control mechanism for planting holes.

As a further improvement of the utility model, the punching and filling machine further comprises a filling mechanism 9 arranged behind the punching mechanism, the filling mechanism 9 comprises a cantilever 11 fixedly connected with the lower end of the lifting mechanism 2, a bin 9-1 arranged below the cantilever 11 and provided with a walking supporting wheel 9-5 at the bottom, and a connecting arm 16 forming a sliding fit with the cantilever 11, the lower end of the connecting arm 16 is fixedly connected with the bin 9-1, the upper end is fixedly connected with a limit block 17 positioned above the cantilever 11, the upper end of the spring 6 is connected with the bottom of the bin 9-1, a filling opening 9-3 matched with the punching rod 4 is arranged on the bottom plate of the bin 9-1, a material baffle 9-2 is arranged in the bin 9-1, a blanking opening 9-4 is arranged on the material baffle 9-2, one end of the material baffle 9-2 is connected with a horizontal telescopic mechanism 10 fixed outside the bin 9-1, the blanking port 9-4 has a degree of freedom of horizontal movement communicating with or separated from the filling port 9-3 by means of the expansion and contraction of the horizontal expansion and contraction mechanism 10.

When the device does not work, the walking positioning wheel 7 and the punching rod 4 are not in contact with the ground, and the cantilever 11 is in contact with the limiting block 17. During operation, the lifting mechanism 2 is adjusted to enable the walking positioning wheel 7 to be in contact with the ground, and at the moment, the punching rod 4 is not in contact with the ground. At the beginning, the horizontal telescopic mechanism 10 is in a contraction state, the blanking port 9-4 on the material baffle plate 9-2 is separated from the filling port 9-3 at the bottom of the material box 9-1, and no filling is carried out. After the walking frame 1 walks to the initial position, the lifting mechanism 2 is adjusted to enable the punching rod 4 to descend for punching operation, at the moment, the cantilever 11 slides downwards along the connecting arm 16 because the walking positioning wheel 7 is in contact with the ground, meanwhile, the positioning rod 5 is inserted into the soil to form a groove on the ground, after punching is completed, the lifting mechanism 2 is adjusted to enable the punching rod 4 and the positioning rod 5 to ascend, at the same time, the cantilever 11 slides upwards along the connecting arm 16, after the punching rod 4 and the positioning rod 5 leave the ground, the walking frame 1 drives the punching mechanism and the filling mechanism 9 to move forwards, at the moment, the lowest part of the walking positioning wheel 7 is still in contact with the ground, the spring 6 is compressed, when the walking positioning wheel 7 reaches the upper part of the groove formed by the positioning rod 5, the spring 6 extends, the walking positioning wheel 7 and the support 8 both move downwards, and the lowest part of the walking positioning wheel 7 enters the groove, the displacement sensor on the support 8 sends a signal to the controller, the controller sends a signal to stop the movement of the walking frame 1, the lifting mechanism 2 drives the punching rod 4 to descend for punching operation, and the positioning rod 5 forms a groove on the ground again.

At the moment, the feeding port 9-3 at the bottom of the bin 9-1 is exactly in one-to-one correspondence with the last punched planting hole of the punching rod 4, the horizontal telescopic mechanism 10 extends to enable the blanking port 9-4 on the material blocking plate 9-2 to be in one-to-one correspondence with the feeding port 9-3 at the bottom of the bin 9-1, as shown in figure 2, materials in the bin 9-1 fall into the punched planting hole of the punching rod 4 after passing through the blanking port 9-4 and the feeding port 9-3, and after the required filling amount is reached, the horizontal telescopic mechanism 10 contracts to drive the material blocking plate 9-2 to move, so that the blanking port 9-4 is separated from the feeding port 9-3, and blanking is stopped. The filling of the materials in the planting holes can be completed while the holes are punched, so that the process of filling the materials separately is omitted, the production procedures can be reduced, and the production efficiency is improved. The walking supporting wheels 9-5 can play a role in supporting the material box 9-1, and can reduce the requirement on the connection strength between the material box 9-1 and the lifting mechanism 2.

As a further improvement, the utility model is characterized in that a bracket is fixed on the front end face of the material box 9-1, and the horizontal telescopic mechanism 10 is fixed on the bracket, so that the horizontal telescopic mechanism 10 is more stable and reliable when being stretched.

As a further improvement of the utility model, the inside of the bin 9-1 is separated into at least two blanking cavities arranged along the front and back direction by means of the partition plate 9-6, the bottom of each blanking cavity is provided with the filling opening 9-3, the position on the partition plate 9-6 corresponding to the striker plate 9-2 is provided with a slide way, the width of the partition plate 9-6 along the front and back direction is linearly increased from top to bottom, so that the material distribution in each blanking cavity is more uniform, and the blanking amount of each filling opening 9-3 is more uniform and consistent.

As to the utility model discloses a further improvement, the filling machine that punches still includes the automatic telescoping mechanism 12 of fixing on cantilever 11 and being connected with the controller, with automatic telescoping mechanism 12 lower extreme fixed connection's locating plate 13, and fix the material disclosing pole 14 of terminal surface under locating plate 13, the lower extreme of material disclosing pole 14 passes the via hole of seting up on workbin 9-1 roof and extends to inside the workbin 9-1, material disclosing pole 14 sets up with the inlet 9-3 one-to-one, material disclosing pole 14 has the lift degree of freedom of pegging graft or separating with the help of the flexible of automatic telescoping mechanism 12 with the inlet 9-3. As shown in figure 2, during filling, the automatic telescoping mechanism 12 extends to push the positioning plate 13 and the poking rod 14 to move downwards to be inserted into the filling opening 9-3, then the automatic telescoping mechanism 12 contracts, the poking rod 14 is separated from the filling opening 9-3, then the automatic telescoping mechanism 12 extends again, and the poking rod 14 is inserted into the filling opening 9-3 again, and the process is repeated, so that the filling effect can be prevented from being influenced by the blockage of the filling opening 9-3.

As right the utility model discloses a further improvement, the filled machine that punches still includes and strengthens arm 15, strengthens arm 15's upper end and 11 fixed connection of cantilever, strengthens arm 15's lower extreme and 3 lower extreme fixed connection of seat that punch. As shown in FIG. 1, the cantilever 11 has stronger bearing capacity and is safer and more reliable.

As right the utility model discloses a further improvement, locating lever 5 and perforating rod 4 control crisscross setting, for example, be provided with about punching seat 3 below and two are listed as perforating rod 4, then locating lever 5 is located between two are listed as perforating rod 4, perhaps locating lever 5 is located the 4 outsides of a certain perforating rod, and the recess that can avoid locating lever 5 to form like this has the overlap and influence the effect of punching with the planting hole that perforating rod 4 formed.

As a further improvement of the utility model, the lifting mechanism 2 comprises a front connecting arm 2-1 and a rear connecting arm 2-2 with a corner, the opening of the rear connecting arm 2-2 faces downwards, the rear end of the rear connecting arm 2-2 is hinged with the walking frame 1, the front end is hinged with the upper end of the front connecting arm 2-1, the lower end of the front connecting arm 2-1 is fixedly connected with the punching seat 3, the lifting mechanism 2 further comprises a rear telescopic mechanism 2-3 hinged between the corner of the rear connecting arm 2-2 and the walking frame 1 and a front telescopic mechanism 2-4 hinged between the front end of the rear connecting arm 2-2 and the front connecting arm 2-1, and the controlled ends of the rear telescopic mechanism 2-3 and the front telescopic mechanism 2-4 are connected with the controller. As shown in figure 1, the front and back, up and down positions of the punching seat 3 can be adjusted through the extension and retraction of the back extension mechanism 2-3 and the front extension mechanism 2-4, the structure is simple, the connection is firm and reliable, the adjustment is convenient and fast, and the time and the labor are saved.

The utility model discloses when specifically using, there are two columns of perforating rods 4 that bilateral symmetry set up on the seat of punching 3, and every is listed as all to arrange along the fore-and-aft direction and has four perforating rods 4, and locating lever 5 is located the center department of 3 front ends of seat of punching, as shown in fig. 1. The fixed end of the automatic telescopic mechanism 12 is fixedly connected with the cantilever 11, the movable end is fixedly connected with a positioning plate 13 positioned below the automatic telescopic mechanism, the number and the arrangement mode of poking rods 14 on the positioning plate 13 are the same as those of punching rods 4, the interior of the material box 9-1 is divided into four blanking cavities by three partition plates 9-6 arranged in the front-back direction, the filling ports 9-3 are all positioned below the blanking cavities, and the horizontal telescopic mechanism 10 is fixed in front of the material box 9-1, as shown in figure 2. In order to make the work bin 9-1 more stable during walking, two connecting arms 16, left and right, are provided at the same time on both the front and rear sides of the work bin 9-1, as shown in fig. 1.

When not in work, the punching mechanism and the filling mechanism 9 can be lifted. When the punching rod 4 punches, a groove is formed on the ground by the positioning rod 5, meanwhile, the material filling port 9-3 at the bottom of the material box 9-1 is exactly in one-to-one correspondence with the planting hole which is just punched by the punching rod 4, at the moment, the horizontal telescopic mechanism 10 extends to enable the material baffle 9-2 to move backwards, the rear end of the material baffle 9-2 is contacted with the inner wall of the material box 9-1, the material dropping port 9-4 on the material baffle 9-2 is communicated with the material filling port 9-3 at the bottom of the material box 9-1 in one-to-one correspondence, as shown in figure 2, the material in the material box 9-1 falls into the planting hole which is punched by the punching rod 4 through the material dropping port 9-4 and the material filling port 9-3, after the required amount of the material is reached, the horizontal telescopic mechanism 10 contracts to drive the material baffle 9-2 to move forwards, so that the material dropping port 9-4 is separated from the material filling port 9-3, stopping blanking;

after punching and packing are accomplished, punching rod 4 and locating lever 5 rise once more and leave ground, and walking frame 1 drives punching mechanism and 9 forward motion of packing mechanism, and walking locating wheel 7 breaks away from the recess and contacts with ground, and spring 6 is compressed once more, so repeatedly can. The distance between the punching mechanism and the walking frame 1 is equal when punching is carried out each time, the walking frame 1 stops after walking at equal distance each time through the change of the displacement of the walking positioning wheel 7, and the purpose of punching at equal distance can be realized. And can accomplish the packing of planting downthehole material when punching, saved the process of independent filling material, can reduce production processes, improve production efficiency.

Claims

1. Machine of packing that punches in dioscorea opposita field, including walking frame (1), set up elevating system (2) at walking frame (1) front end and fix the mechanism of punching at elevating system (2) lower extreme, the controlled end of walking frame (1) and elevating system (2) all is connected with the controller, and the mechanism of punching includes seat (3) of punching and sets up punching rod (4) in seat (3) below of punching, its characterized in that: locating lever (5) of downwardly extending is fixed with at punching seat (3) front end, be provided with spring (6) and walking locating wheel (7) at punching seat (3) rear, the upper end and the mechanism of punching of spring (6) are connected, the lower extreme is fixed with support (8), walking locating wheel (7) and support (8) form normal rear of normal rear portion of normal running fit and walking locating wheel (7) are located locating lever (5), the least of walking locating wheel (7) contacts with ground or is located the recess that locating lever (5) formed, be fixed with displacement sensor on support (8), displacement sensor, a controller, the controlled end of walking frame (1) connects gradually and forms the interval control mechanism who plants the hole.

2. The yam field punching and filling machine as claimed in claim 1, wherein: the punching filling machine also comprises a filling mechanism (9) arranged behind the punching mechanism, the filling mechanism (9) comprises a cantilever (11) fixedly connected with the lower end of the lifting mechanism (2), a bin (9-1) arranged below the cantilever (11) and provided with a walking supporting wheel (9-5) at the bottom, and a connecting arm (16) in sliding fit with the cantilever (11), the lower end of the connecting arm (16) is fixedly connected with the bin (9-1), the upper end of the connecting arm is fixedly connected with a limiting block (17) positioned above the cantilever (11), the upper end of a spring (6) is connected with the bottom of the bin (9-1), a filling opening (9-3) matched with the punching rod (4) is arranged on the bottom plate of the bin (9-1), a material baffle plate (9-2) is arranged in the bin (9-1), a material dropping opening (9-4) is arranged on the material baffle plate (9-2), one end of the material baffle plate (9-2) is connected with a horizontal telescopic mechanism (10) fixed outside the material box (9-1), and the blanking port (9-4) has a horizontal movement freedom degree communicated with or separated from the filling port (9-3) by virtue of the telescopic action of the horizontal telescopic mechanism (10).

3. The yam field punching and filling machine as claimed in claim 2, wherein: a bracket is fixed on the front end surface of the feed box (9-1), and a horizontal telescopic mechanism (10) is fixed on the bracket.

4. The yam field punching and filling machine as claimed in claim 2, wherein: the inside of the material box (9-1) is divided into at least two blanking cavities arranged in the front-back direction by means of partition plates (9-6), a filling opening (9-3) is formed in the bottom of each blanking cavity, a slide way is formed in the position, corresponding to the material baffle plate (9-2), of each partition plate (9-6), and the width of each partition plate (9-6) in the front-back direction is linearly increased from top to bottom.

5. The yam field punching and filling machine as claimed in claim 2, wherein: the punching and filling machine further comprises an automatic telescopic mechanism (12) which is fixed on the cantilever (11) and connected with the controller, a positioning plate (13) which is fixedly connected with the lower end of the automatic telescopic mechanism (12), and a poking rod (14) which is fixed on the lower end face of the positioning plate (13), wherein the lower end of the poking rod (14) penetrates through a through hole formed in a top plate of the feed box (9-1) and extends into the feed box (9-1), the poking rod (14) and the filling ports (9-3) are arranged in a one-to-one correspondence manner, and the poking rod (14) has the lifting freedom degree which is spliced with or separated from the filling ports (9-3) by means of the stretching of the automatic telescopic mechanism (12).

6. The yam field punching and filling machine as claimed in claim 5, wherein: the punching and filling machine further comprises a reinforcing arm (15), the upper end of the reinforcing arm (15) is fixedly connected with the cantilever (11), and the lower end of the reinforcing arm (15) is fixedly connected with the lower end of the punching seat (3).

7. The yam field punching and filling machine as claimed in claim 1, wherein: the positioning rods (5) and the punching rods (4) are arranged in a left-right staggered mode.

8. The yam field punching and filling machine as claimed in claim 1, wherein: the lifting mechanism (2) comprises a front connecting arm (2-1) and a rear connecting arm (2-2) with a corner, the opening of the rear connecting arm (2-2) faces downwards, the rear end of the rear connecting arm (2-2) is hinged with the traveling rack (1), the front end of the rear connecting arm is hinged with the upper end of the front connecting arm (2-1), the lower end of the front connecting arm (2-1) is fixedly connected with the punching seat (3), the lifting mechanism (2) further comprises a rear telescopic mechanism (2-3) hinged between the corner of the rear connecting arm (2-2) and the traveling rack (1), and a front telescopic mechanism (2-4) hinged between the front end of the rear connecting arm (2-2) and the front connecting arm (2-1), wherein the controlled ends of the rear telescopic mechanism (2-3) and the front telescopic mechanism (2-4) are connected with a controller.