A device for controlling wheat diseases and insect pests

Abstract

The present application relates to the technical field of wheat pest control, and discloses a wheat pest control device, including a frame, a support mechanism is provided on the frame, an insecticidal mechanism is provided on the support mechanism, the insecticidal mechanism includes a mounting seat, a trapping lamp, and an electric grid, the mounting seat is fixed on the support mechanism, the trapping lamp is rotatably connected to the mounting seat, and the electric grid is evenly arranged along the circumference of the trapping lamp, and the electric grid is in the shape of a spiral leaf. The present application has the effect of improving the efficiency of killing pests.

Description

Technical Field

[0001] The present application relates to the technical field of wheat disease and pest control, and in particular to a device for wheat disease and pest control. Background Art

[0002] Crops often encounter problems with diseases and pests during the planting process. As one of the main food crops, wheat is widely planted in the northern region. With the addition of mechanization, the efficiency of wheat planting has been greatly improved compared with the past, but this cannot avoid the problem of diseases during wheat growth.

[0003] In order to improve the yield and quality of wheat, it is necessary to prevent and control pests and diseases. The existing wheat pest and disease control method is to set up trapping lights to induce pests to fly over and then kill them.

[0004] However, in the process of implementing relevant technical solutions, it was found that there are at least the following technical problems: pests are only induced to fly by setting up trapping lights, and the pests are captured and killed by using fixed installed power grids. The pests can only be killed when they pass through the power grid, and the efficiency of eliminating pests is not high. Summary of the invention

[0005] The present application provides a device for controlling wheat pests and diseases, thereby solving the problem in the prior art of only inducing pests to fly by setting up trapping lights and using fixedly installed power grids to capture and kill the pests, and the pests can only be killed when they pass through the power grid, resulting in low efficiency in eliminating pests, thereby achieving improved efficiency in killing pests.

[0006] The present application provides a device for controlling wheat pests and diseases, comprising a frame, a supporting mechanism being provided on the frame, an insecticidal mechanism being provided on the supporting mechanism, the insecticidal mechanism comprising a mounting seat, a trapping lamp, and an electric grid, the mounting seat being fixed on the supporting mechanism, the trapping lamp being rotatably connected to the mounting seat, a plurality of electric grids being evenly arranged along the circumference of the trapping lamp, and the electric grid being in the shape of spiral leaves.

[0007] Furthermore, the supporting mechanism includes a connecting rope and a balloon, the connecting rope is connected to the frame, the insect-killing mechanism is arranged at a position close to the top of the connecting rope, and the balloon is fixed to the top of the connecting rope and is used to drive the insect-killing mechanism to suspend.

[0008] Furthermore, a wire-taking mechanism is provided in the frame, and the wire-taking mechanism includes a wire-taking roller and a wire-taking motor. The wire-taking roller is rotatably connected to the frame, the other end of the connecting rope is fixed to the wire-taking roller, the wire-taking motor is fixed to the frame, and the output shaft of the wire-taking motor is fixed to the end of the wire-taking roller.

[0009] Furthermore, a wire mechanism is provided on the frame, and the wire mechanism includes a wire screw, a guide rod, a wire seat, and a wire motor. The wire screw is rotatably connected to the frame and is located above the wire take-up roller. The guide rod is fixedly installed on the frame and is located above the wire take-up roller. The wire screw and the guide rod are parallel to each other. The wire screw passes through the wire seat and is threadedly connected to the wire seat. The guide rod passes through the wire seat and slidably cooperates with the wire seat. The wire motor is fixed on the frame and fixed to one end of the wire screw. The wire seat is located directly above the wire take-up roller and slides axially along the wire take-up roller. The connecting rope slides through the wire seat and is fixed to the wire take-up roller.

[0010] Furthermore, a accommodating mechanism is provided on the frame, and the accommodating mechanism includes a plurality of box plates distributed in a circle, and the plurality of box plates are spliced ​​together to form a accommodating box, and the accommodating box is used to store the supporting mechanism and the insecticide mechanism, and the outer sides of the box plates are connected to the frame through a hinge seat, and a plurality of push-pull cylinders are hingedly provided on the frame and located inside the accommodating box, and the plurality of push-pull cylinders are arranged in a one-to-one correspondence with the plurality of box plates, and the piston rod ends of the push-pull cylinders are hingedly provided to the inner side wall of the box plate and near the bottom, and a through hole for the connecting rope to pass through is provided on the top of the accommodating box.

[0011] Furthermore, the mounting seat is funnel-shaped, and the opening of the mounting seat faces downward, and a speed sensor is provided on the inner top surface of the mounting seat, the speed sensor is electrically connected to the line-reeling mechanism, and the trapping light is connected to the speed sensor.

[0012] Furthermore, a funnel-shaped base is provided on the connecting rope, the opening of the base faces the mounting seat, a rotating socket is provided inside the base, and a plug for use with the rotating socket is provided at the bottom of the trapping light.

[0013] Furthermore, a trapping box is connected to the lower end of the base, and a through hole communicating with the trapping box is opened in the center of the base.

[0014] Furthermore, a walking mechanism is provided at the bottom of the frame, and the walking mechanism includes a transmission wheel and a crawler track. The lower end surface of the frame and near the four corners are rotatably connected to a transmission wheel, and two transmission wheels located on the same side of the frame are provided with a crawler track. A mobile motor is provided under the frame, and the mobile motor is fixed to a transmission wheel.

[0015] Furthermore, a positioning mechanism is provided on the frame, and the positioning mechanism includes a fixed seat, a connecting rod, an insertion rod and a positioning cylinder. Four fixed seats are provided, which are respectively fixed at positions near the four corners of the frame. One end of the connecting rod is rotatably connected to the fixed seat, and each of the fixed seats is rotatably connected to two parallel connecting rods, and the other ends of the two connecting rods are hinged to an insertion rod, and the insertion rod is located on the outside of the frame. One end of the positioning cylinder is hinged to the frame, and the piston rod end of the positioning cylinder is hinged to a connecting rod near the fixed seat.

[0016] The technical solution provided in this application has at least the following technical effects or advantages:

[0017] 1. Since multiple electric grids are arranged around the trapping lamp, when the wind blows the electric grid to rotate, the pests around the electric grid can be killed efficiently, which effectively solves the problem that the existing technology only uses trapping lamps to induce pests to fly, and uses fixed electric grids to capture and kill pests. The pests can only be killed when they pass through the electric grid, and the efficiency of eliminating pests is not high, thereby improving the efficiency of killing pests.

[0018] 2. Due to the adoption of a take-up mechanism, the length of the connecting rope can be adjusted, and thus the position of the insect-killing mechanism can be adjusted, which effectively solves the problem in the prior art that the position of the insect-killing mechanism cannot be adjusted arbitrarily, and thus achieves the effect of facilitating and quickly adjusting the placement position of the insect-killing mechanism.

[0019] 3. Due to the use of a accommodating mechanism, the insecticide mechanism and the supporting mechanism can be accommodated in the accommodating box, which effectively solves the only problem in the prior art that the installation position of the insecticide mechanism is inconvenient for accommodation, thereby achieving the effect of facilitating the accommodation of the insecticide mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application;

[0021] Figure 2 It is a structural schematic diagram of the walking mechanism in the embodiment of the present application;

[0022] Figure 3 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0023] Figure 4 It is a structural schematic diagram of the insecticide mechanism in the embodiment of the present application;

[0024] Figure 5 It is a structural schematic diagram of the accommodation mechanism in the embodiment of the present application;

[0025] Figure 6 Schematic diagram of the internal structure of the wire collection box in the embodiment of the present application;

[0026] Figure 7 for Figure 6 The enlarged schematic diagram of point B in the middle;

[0027] In the figure: 1. frame; 2. walking mechanism; 21. transmission wheel; 22. crawler track; 23. mobile motor; 3. positioning mechanism; 31. fixed seat; 32. connecting rod; 33. plug rod; 34. positioning cylinder; 4. supporting mechanism; 41. connecting rope; 42. balloon; 5. insect killing mechanism; 51. mounting seat; 52. trapping lamp; 53. power grid; 54. speed sensor; 55. base; 551. through hole; 56. rotating socket; 57. plug; 58. trapping box; 6. wire taking-up mechanism; 61. wire taking-up roller; 62. wire taking-up motor; 63. wire taking-up box; 64. mounting groove; 65. plastic film; 7. wire guide mechanism; 71. wire guide screw; 72. guide rod; 73. wire guide seat; 74. wire guide motor; 8. accommodating mechanism; 81. box plate; 82. hinged seat; 83. push-pull cylinder; 84. solar panel; 85. perforation. DETAILED DESCRIPTION

[0028] The embodiment of the present application discloses a device for controlling wheat pests and diseases. The pest killing mechanism 5 can be installed and fixed by a supporting mechanism 4, and the power grid 53 can be blown by wind to kill the pests near the pest killing mechanism 5, thereby improving the killing efficiency.

[0029] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] Reference Figure 1 A wheat pest control device includes a frame 1, a walking mechanism 2 is installed at the bottom of the frame 1, and the frame 1 can be conveniently placed at a location where pests and diseases need to be removed. A positioning mechanism 3 is installed on the frame 1 and near both ends, and the frame 1 can be positioned. A support mechanism 4 is installed above the frame 1, and an insecticide mechanism 5 is installed on the support mechanism 4. The insecticide mechanism 5 is installed through the support mechanism 4, which is convenient for killing pests and diseases near the wheat planting field.

[0031] Reference Figure 1 , Figure 2 The walking mechanism 2 includes a transmission wheel 21 and a crawler 22. The lower end surface of the frame 1 and near the four corners are rotatably connected with a transmission wheel 21. Two transmission wheels 21 on the same side of the frame 1 are sleeved with a crawler 22. A moving motor 23 is fixedly installed below the frame 1. The moving motor 23 is fixed to a transmission wheel 21. The transmission wheel 21 connected to it is driven to rotate by the moving motor 23, so that the whole can be driven to move.

[0032] Reference Figure 1 , Figure 2 The positioning mechanism 3 includes a fixed seat 31, a connecting rod 32, an insertion rod 33 and a positioning cylinder 34. There are four fixed seats 31, which are fixedly installed on the upper end surface of the frame 1. The four fixed seats 31 are respectively located near the four corners of the frame 1. One end of the connecting rod 32 is rotatably connected to the fixed seat 31, and the other end extends away from the frame 1. Two parallel connecting rods 32 are rotatably connected to each fixed seat 31, and the other ends of the two connecting rods 32 are hinged to an insertion rod 33. The insertion rod 33 is located on the outside of the frame 1. One end of the positioning cylinder 34 is hinged to the frame 1, and the piston rod end of the positioning cylinder 34 is hinged to a connecting rod 32 near the fixed seat 31. By extending the positioning cylinder 34, the movable end of the connecting rod 32 can be pushed to rotate below the frame 1, driving the other end of the insertion rod 33 to be inserted into the ground, so as to position the frame 1. The fixed seat 31 and the insertion rod 33 are parallel to each other, and the two connecting rods 32 are parallel to each other. The fixed seat 31, the insertion rod 33 and the two connecting rods 32 are connected to form a parallelogram structure. Since the fixed seat 31 is vertically fixed on the frame 1, when the end of the connecting rod 32 connected to the insertion rod 33 rotates downward, it can drive the insertion rod 33 to move vertically downward and be inserted into the ground.

[0033] Reference Figure 1 , Figure 2 The supporting mechanism 4 includes a connecting rope 41 and a balloon 42. The connecting rope 41 is connected to the frame 1. The balloon 42 is fixed to the top of the connecting rope 41. The insect-killing mechanism 5 is installed at a position close to the top of the connecting rope 41, located below the balloon 42 and spaced apart from the balloon 42. The insect-killing mechanism 5 is suspended in the air by the buoyancy of the balloon 42, so that flying insects in the air can be killed. A lightweight net is set on the surface of the balloon 42 to protect the surface of the balloon 42. A take-up mechanism 6 is installed on the frame 1, which can facilitate the adjustment of the length of the connecting rope 41, thereby adjusting the installation position of the insect-killing mechanism 5.

[0034] Reference Figure 1 , Figure 3 and Figure 4The insect extermination mechanism 5 includes a mounting seat 51, a trapping lamp 52, and an electric grid 53. The mounting seat 51 is fixed on the connecting rope 41. The mounting seat 51 is funnel-shaped, and the opening of the mounting seat 51 faces downward. The trapping lamp 52 is cylindrical, and the upper end of the trapping lamp 52 is rotatably connected to the mounting seat 51. A plurality of electric grids 53 are evenly arranged along the circumference of the trapping lamp 52. Two fixed sleeves are fixed on the circumference of the trapping lamp 52, and the two fixed sleeves are respectively close to the upper and lower ends of the trapping lamp 52. The electric grid 53 is in the shape of a spiral leaf, and the center line of the electric grid 53 coincides with the center line of the trapping lamp 52. The upper end of each electric grid 53 is fixed to the upper fixed sleeve, and the lower end of the electric grid 53 is fixed to the lower fixed sleeve. A speed sensor 54 is fixedly installed on the inner top surface of the mounting seat 51, and the trapping lamp 52 is connected to the speed sensor 54, and the speed sensor 54 is electrically connected to the winding mechanism 6. The power grid 53 is driven by wind to rotate the trapping lamp 52, so that the speed sensor 54 can obtain the speed of the trapping lamp 52. A base 55 is fixed on the connecting rope 41. The base 55 is funnel-shaped. The opening of the base 55 faces the mounting seat 51, and the base 55 and the mounting seat 51 are arranged opposite to each other. A rotating socket 56 is fixedly installed in the base 55 and located at the center. The rotating socket 56 is spaced from the bottom of the base 55 and is fixedly connected to the upper end surface of the base 55 through a plurality of support rods. A plug 57 is fixed at the bottom of the trapping lamp 52 and is used in conjunction with the rotating socket 56. In order to improve the killing effect of pests and diseases, a through hole 551 is opened in the center of the base 55. A trapping box 58 is connected to the inner thread of the through hole 551. The cross section of the trapping box 58 is annular. The connecting rope 41 passes through the inner side wall of the trapping box 58 and is fixedly connected to the inner side wall of the trapping box 58. The bottom of the trapping box 58 is sealed. The trapping box 58 is filled with trapping food or trapping agent, which is dispersed upward through the through hole 551 to attract pests and diseases to fly to the electric net 53 for killing. In addition, the mounting seat 51 is funnel-shaped, and the edge is larger than the outer edge of the electric net 53, which can protect the electric net 53 and the trapping lamp 52 from rain. The base 55 is funnel-shaped, which can facilitate the killed pests and diseases to slide along the upper surface of the base 55 and fall into the trapping box 58 for centralized treatment.

[0035] Reference Figure 5 , Figure 6 and Figure 7The wire-taking mechanism 6 includes a wire-taking roller 61 and a wire-taking motor 62. A wire-taking box 63 is fixedly installed on the frame 1 and located at the center. The wire-taking box 63 is in the shape of a rectangular box. A mounting groove 64 communicating with the inside is provided at the upper end of the wire-taking box 63. The mounting groove 64 is arranged along the length direction of the wire-taking box 63. The wire-taking roller 61 is rotatably connected to the frame 1 and is located in the wire-taking box 63. The axial direction of the wire-taking roller 61 is consistent with the length direction of the wire-taking box 63. The other end of the connecting rope 41 is fixed to the wire-taking roller 61, and the wire-taking motor 62 is fixed to the frame 1. The wire-taking motor 62 is fixedly installed in the wire-taking box 63, and the output shaft of the wire-taking motor 62 is fixed to the end of the wire-taking roller 61. The wire take-up motor 62 rotates to drive the wire take-up roller 61 to rotate forward or backward. When the wire take-up roller 61 rotates forward, it can drive the wire take-up roller 61 to tighten the connecting rope 41. When the wire take-up roller 61 rotates backward, it can loosen the connecting rope 41, so that the balloon 42 can drive the insecticide mechanism 5 to rise higher. In order to reduce the dust and rainwater adhering to the surface of the connecting rope 41 from entering the wire take-up box 63, two symmetrically arranged plastic films 65 are fixed to the notch of the installation groove 64. The other end of the connecting rope 41 passes through the connection between the two plastic films 65 and extends into the wire take-up box 63 to be fixed to the wire take-up roller 61. The connecting rope 41 can move along the connection between the two plastic films 65.

[0036] Reference Figure 5 , Figure 6 and Figure 7 A wire mechanism 7 is installed in the wire take-up box 63, which can facilitate the quick arrangement of the connecting rope 41 and standardize the winding of the connecting rope 41. The wire mechanism 7 includes a wire screw 71, a guide rod 72, a wire seat 73, and a wire motor 74. Two groups of connecting seats are fixedly installed on the inner top wall of the wire take-up box 63, and each group of connecting seats includes two spaced connecting blocks. The wire screw 71 is rotatably connected to one group of connecting seats and is located above the wire take-up roller 61. The guide rod 72 is fixedly installed on the other group of connecting seats and is located above the wire take-up roller 61. The wire screw 71 and the guide rod 72 are parallel to each other, and the length direction of the guide screw is consistent with the length direction of the wire take-up box 63. The wire seat 73 is slidably connected in the mounting groove 64, and the wire seat 73 slides along the length direction of the mounting groove 64, the wire screw 71 passes through the wire seat 73 and is threadedly connected to the wire seat 73, the guide rod 72 passes through the wire seat 73 and slidably cooperates with the wire seat 73, the wire motor 74 is fixed on the frame 1 and fixed to one end of the wire screw 71, the wire seat 73 is located directly above the take-up roller 61 and slides axially along the take-up roller 61, the connecting rope 41 slides through the wire seat 73 and is fixed to the take-up roller 61, and the connecting rope 41 slidably cooperates with the wire seat 73.

[0037] Reference Figure 1 , Figure 2 and Figure 5, a accommodating mechanism 8 is installed on the frame 1 and at the center. The accommodating mechanism 8 includes a plurality of box plates 81 distributed in a circumference. The plurality of box plates 81 are spliced ​​to form a accommodating box. The accommodating box is used to accommodate the supporting mechanism 4 and the insect-killing mechanism 5. When the insect-killing mechanism 5 is not needed, it can be stored. The outer side of the box plate 81 and the position near the bottom are connected to the frame 1 through a hinge seat 82. The frame 1 and the position inside the accommodating box are hinged with a plurality of push-pull cylinders 83. The plurality of push-pull cylinders 83 are arranged one by one with the plurality of box plates 81. The piston rod ends of the push-pull cylinders 83 are hinged with the inner side wall of the box plate 81 and the position near the bottom. The push-pull cylinders 83 are inclined, and the inclination direction is from bottom to top to the side of the box plate 81 connected thereto. The top of the accommodating box is a hollow hemispherical body. The top of the accommodating box is provided with a perforation 85 for the connection rope 41 to pass through. A solar panel 84 is fixed on the outer side wall of the box plate 81 and the position near the top.

[0038] The working principle of the embodiment of the present application is: the frame 1 is moved to the wheat field where pest control is required, and the frame 1 can be moved a certain distance after a period of time to expand the pest control range. When the flying insects are lured by the combination of the trapping lamp 52 and the trapping box 58, they fly to the electric grid 53 and are killed. If the wind blows, the electric grid 53 can be blown to drive the electric grid 53 to rotate, and then the flying insects around the trapping lamp 52 can be killed to a large extent, thereby improving the killing efficiency.

[0039] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0040] What has been described above is only a preferred specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A device for controlling wheat pests and diseases, comprising a frame (1), characterized in that: The frame (1) is provided with a support mechanism (4), and the support mechanism (4) is provided with an insecticidal mechanism (5), the insecticidal mechanism (5) comprising a mounting seat (51), a trapping light (52), and an electric network (53), the mounting seat (51) being fixed on the support mechanism (4), the trapping light (52) being rotatably connected to the mounting seat (51), a plurality of electric networks (53) being evenly arranged along the circumference of the trapping light (52), and the electric network (53) being in the shape of spiral leaves; The support mechanism (4) comprises a connecting rope (41) and a balloon (42); the connecting rope (41) is connected to the frame (1); the insect-killing mechanism (5) is arranged at a position close to the top of the connecting rope (41); the balloon (42) is fixed to the top of the connecting rope (41) and is used to drive the insect-killing mechanism (5) to suspend; A wire-taking mechanism (6) is arranged in the frame (1), and the wire-taking mechanism (6) comprises a wire-taking roller (61) and a wire-taking motor (62); the wire-taking roller (61) is rotatably connected to the frame (1); the other end of the connecting rope (41) is fixed to the wire-taking roller (61); the wire-taking motor (62) is fixed to the frame (1); and the output shaft of the wire-taking motor (62) is fixed to the end of the wire-taking roller (61); The frame (1) is provided with a accommodating mechanism (8), the accommodating mechanism (8) comprising a plurality of box plates (81) distributed in a circumferential manner, the plurality of box plates (81) being spliced ​​together to form a accommodating box, the accommodating box being used to accommodate the supporting mechanism (4) and the insecticide mechanism (5), the outer side of the box plate (81) being connected to the frame (1) via a hinge seat (82), a plurality of push-pull cylinders (83) being hingedly connected at a position on the frame (1) and located inside the accommodating box, the plurality of push-pull cylinders (83) being arranged in a one-to-one correspondence with the plurality of box plates (81), the piston rod ends of the push-pull cylinders (83) being hingedly connected to the inner side wall of the box plate (81) and close to the bottom, and a through hole (85) for the connecting rope (41) to pass through is provided at the top of the accommodating box; A walking mechanism (2) is arranged at the bottom of the frame (1), and the walking mechanism (2) comprises a transmission wheel (21) and a crawler belt (22). A transmission wheel (21) is rotatably connected to the lower end surface of the frame (1) and near four corners. A crawler belt (22) is sleeved on two transmission wheels (21) located on the same side of the frame (1). A moving motor (23) is arranged below the frame (1), and the moving motor (23) is fixed to a transmission wheel (21).

2. The wheat pest control device according to claim 1, characterized in that: The frame (1) is provided with a conductor mechanism (7), the conductor mechanism (7) comprising a conductor screw (71), a guide rod (72), a conductor seat (73), and a conductor motor (74); the conductor screw (71) is rotatably connected to the frame (1) and is located above the wire take-up roller (61); the guide rod (72) is fixedly mounted on the frame (1) and is located above the wire take-up roller (61); the conductor screw (71) and the guide rod (72) are parallel to each other; the conductor screw (71) passes through the wire seat (73) and is threadedly connected to the wire seat (73), the guide rod (72) passes through the wire seat (73) and is slidably matched with the wire seat (73), the wire motor (74) is fixed on the frame (1) and is fixed to one end of the wire lead screw (71), the wire seat (73) is located directly above the wire take-up roller (61) and slides axially along the wire take-up roller (61), and the connecting rope (41) slides through the wire seat (73) and is fixed to the wire take-up roller (61).

3. The wheat pest control device according to claim 1, characterized in that: The mounting seat (51) is funnel-shaped, and the opening of the mounting seat (51) faces downward. A rotation speed sensor (54) is provided on the inner top surface of the mounting seat (51). The rotation speed sensor (54) is electrically connected to the line-reeling mechanism (6), and the trapping light (52) is connected to the rotation speed sensor (54).

4. The wheat pest control device according to claim 1, characterized in that: A funnel-shaped base (55) is provided on the connecting rope (41), the opening of the base (55) faces the mounting seat (51), a rotating socket (56) is provided in the base (55), and a plug (57) for use with the rotating socket (56) is provided at the bottom of the trapping light (52).

5. The wheat pest control device according to claim 4, characterized in that: The lower end of the base (55) is connected to a trapping box (58), and a through hole (551) communicating with the trapping box (58) is provided at the center of the base (55).

6. The wheat pest control device according to claim 1, characterized in that: The frame (1) is provided with a positioning mechanism (3), the positioning mechanism (3) comprising a fixed seat (31), a connecting rod (32), an insert rod (33) and a positioning cylinder (34); four fixed seats (31) are provided, which are respectively fixed at positions close to four corners of the frame (1); one end of the connecting rod (32) is rotatably connected to the fixed seat (31); each of the fixed seats (31) is rotatably connected to two parallel connecting rods (32); the other ends of the two connecting rods (32) are hinged to an insert rod (33); the insert rod (33) is located outside the frame (1); one end of the positioning cylinder (34) is hinged to the frame (1); and the end of the piston rod of the positioning cylinder (34) is hinged to a connecting rod (32) at a position close to the fixed seat (31).

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