Adjustable baffle for vertical blanking and shredding machine

Abstract

The present application belongs to the technical field of silk making equipment, and particularly relates to an adjustable baffle for a vertical material falling silk cutting machine, which comprises: an upper baffle hingedly connected to the upper end of the silk cutting machine, wherein a mounting groove is formed in the lower end of the upper baffle; a lower baffle, which is slidingly installed in the mounting groove along the length direction of the upper baffle, and wherein a connecting block is fixedly installed on the lower baffle; a support rod hingedly connected to the upper end of the silk cutting machine, wherein a sliding block is hingedly connected to the lower end of the support rod; a power mechanism, which is fixedly installed on the upper baffle, and wherein a transmission mechanism is installed on the power output end of the power mechanism; the connecting block and the sliding block are both installed on the transmission mechanism, and the power mechanism drives the connecting block and the sliding block to move in opposite directions along the length direction of the upper baffle through the transmission mechanism. The purpose is to solve the problems of low adjustment efficiency and high labor intensity caused by the structural defects of the existing baffle.

Description

Technical Field

[0001] This invention belongs to the technical field of filament-making equipment, specifically relating to an adjustable baffle for a vertical feeding filament cutter. Background Technology

[0002] In the cigarette shredding production line, proper adjustment of the front baffle is crucial to ensuring the shredding quality of the shredding machine during the shredding process.

[0003] During the shredding process, the front baffle acts as a barrier to the tobacco shreds, while the length and angle of the front push plate determine the amount of material stored in the hopper. However, during seasonal changes and when there are large fluctuations in temperature and humidity in the external environment, issues such as shred slippage and uneven shred thickness can easily occur, failing to meet the process quality requirements.

[0004] Therefore, we need to manually replace the front push plate of different lengths and manually adjust its angle to cope with the impact of changes in external temperature and humidity on the shredding quality.

[0005] However, during each replacement, the limited space restricts the replacement operation, and the relatively fixed position for manual angle adjustment cannot well meet the needs of angle adjustment. This makes the operation of the push plate (baffle) before each replacement complicated, requiring multiple repeated adjustments and experiments to achieve the desired effect, which also wastes a lot of time and significantly increases the labor intensity of repair personnel. Summary of the Invention

[0006] The purpose of this invention is to provide an adjustable baffle for a vertical material feeding and shredding machine, in order to solve the problems of low adjustment efficiency and high labor intensity caused by the defects of existing baffle structures.

[0007] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0008] An adjustable baffle for a vertical feeding shredder includes:

[0009] The upper end of the upper baffle is hinged to the shredder, and the lower end of the upper baffle is provided with an installation groove;

[0010] The lower baffle is slidably installed in the mounting groove along the length direction of the upper baffle, and a connecting block is fixedly installed on the lower baffle;

[0011] A support rod is hinged at the upper end to the shredder, and a sliding block is hinged at the lower end of the support rod;

[0012] A power mechanism is fixedly mounted on the upper baffle, and a transmission mechanism is installed at the power output end of the power mechanism;

[0013] Both the connecting block and the sliding block are mounted on the transmission mechanism. The power mechanism drives the connecting block and the sliding block to move in opposite directions along the length of the upper baffle via the transmission mechanism.

[0014] Further specifying, a guide frame is fixedly installed on the upper baffle, the guide frame includes a guide rod, a guide cylinder is slidably installed on the guide rod, and the guide cylinder is fixedly installed on the lower baffle.

[0015] This structural design, through the cooperation of guide rods and guide cylinders, completes the sliding connection between the upper baffle and the lower baffle. It has a simple structure, is easy to install, and is highly practical.

[0016] Further defining the guide frame, the guide frame also includes a crossbar and a first mounting base. The crossbar is fixedly mounted on the upper baffle and spans the mounting groove. The first mounting base is fixedly mounted on the upper baffle. The guide rod is installed between the crossbar and the first mounting base.

[0017] This structural design, with a crossbar spanning the mounting slot supporting the free end of the guide rod, makes the structure more stable and practical.

[0018] Further specifying, the power mechanism is a controllable motor, and the transmission mechanism includes a first lead screw;

[0019] The first lead screw is rotatably mounted on the upper baffle and is connected to a controllable motor for transmission. The connecting block is screwed onto the first lead screw.

[0020] This structural design uses a controllable motor to drive the first lead screw to rotate. The rotation of the first lead screw can drive the lower baffle, which is equipped with a connecting block, to slide along the length of the upper baffle. The structure is simple, easy to control, and highly practical. Furthermore, the screw connection between the lead screw and the nut has a self-locking function, which is more suitable for the work requirements in this invention where the position needs to be locked after adjustment. It is highly practical.

[0021] Furthermore, the transmission mechanism further includes a first gear, a second lead screw, and a second gear;

[0022] The first gear is fixedly mounted on the first lead screw;

[0023] The second lead screw is rotatably mounted on the upper baffle, the second gear is fixedly mounted on the second lead screw and meshes with the first gear, and the sliding block is screwed onto the second lead screw.

[0024] This structural design, through the meshing of the first and second gears, causes the first and second lead screws to rotate in opposite directions, thereby driving the connecting block and the sliding block to move in opposite directions. The structure is simple, easy to install, and highly practical.

[0025] Further, a linear guide rail is fixedly installed on the upper baffle, and the sliding block is slidably installed on the linear guide rail.

[0026] This structural design uses a linear guide rail to bear the radial load on the sliding block, avoiding the problem of the second lead screw bending due to the radial load being directly applied to it, making it highly practical.

[0027] Further specified, a guide frame is fixedly installed on the upper baffle, the guide frame includes a guide rod, a guide cylinder is slidably installed on the guide rod, and the guide cylinder is fixedly installed on the lower baffle;

[0028] The guide frame also includes a crossbar, a first mounting base, and a second mounting base;

[0029] The crossbar is fixedly installed on the upper baffle and spans the mounting groove, the first mounting seat is fixedly installed on the upper baffle, and the guide rod is installed between the crossbar and the first mounting seat;

[0030] The second mounting base is fixedly mounted on the upper baffle, and the linear guide rail is mounted on the second mounting base and the crossbar, with the linear guide rail located between the connecting block and the sliding block.

[0031] This structural design, which uses a crossbar and a second mounting base to install the linear guide rail, provides stable support for the sliding block. Furthermore, by limiting the position of the linear guide rail, it avoids the linear guide rail affecting the sliding of the connecting block, making it highly practical.

[0032] Further specifying, the power mechanism is a controllable motor, and the transmission mechanism includes a first lead screw;

[0033] The first lead screw includes a first threaded section and a second threaded section, the threads of the first threaded section and the second threaded section have opposite directions, the connecting block is screwed onto the first threaded section, and the sliding block is screwed onto the second threaded section.

[0034] This structural design uses a first and a second threaded section with opposite directions to support the connecting block and the sliding block respectively, thereby driving the connecting block and the sliding block to move in opposite directions. The structure is simple, easy to install, and highly practical.

[0035] The invention employing the above technical solution has the following advantages:

[0036] 1. The overall length and tilt angle of the baffle can be adjusted directly through the power mechanism, eliminating the need for manual operation, thus improving adjustment efficiency and reducing the labor intensity of maintenance personnel;

[0037] 2. The power mechanism drives the connecting block and sliding block to move in opposite directions through the transmission mechanism, adjusting the overall length of the baffle and the overall tilt angle of the baffle to adapt to changes in the temperature and humidity of the external environment.

[0038] 3. The overall length and tilt angle of the baffle are adjusted simultaneously using the same power mechanism, reducing the number of power mechanisms required, lowering equipment manufacturing costs, and making adjustment easier and more convenient. Attached Figure Description

[0039] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0040] Figure 1 This is a schematic diagram of the structure of an adjustable baffle for a vertical material feeding and shredding machine according to the present invention. Figure 1 ;

[0041] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0042] Figure 3 This is a schematic diagram of the structure of an adjustable baffle for a vertical material feeding and shredding machine according to the present invention. Figure 2 ;

[0043] Figure 4 for Figure 3 Enlarged structural diagram at point B;

[0044] Figure 5 This is a schematic diagram of the guide frame portion in an embodiment of an adjustable baffle for a vertical material feeding and slicing machine according to the present invention;

[0045] The symbols for the main components are explained below:

[0046] Upper baffle 1, mounting slot 11

[0047] Lower baffle 2, connecting block 21

[0048] Support rod 3, sliding block 31

[0049] Controllable motor 4, first lead screw 41, first gear 410, second lead screw 42, second gear 420, linear guide rail 43, guide frame 5, guide rod 51, guide cylinder 52, crossbar 53, first mounting base 54, second mounting base 55. Detailed Implementation

[0050] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. In addition, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0051] Example 1:

[0052] like Figures 1-5 As shown, an adjustable baffle for a vertical feeding shredder of the present invention includes:

[0053] The upper baffle 1 is hinged to the shredder at the top, and the lower end of the upper baffle 1 is provided with a mounting groove 11;

[0054] Lower baffle 2 is slidably installed in mounting groove 11 along the length direction of upper baffle 1, and connecting block 21 is fixedly installed on lower baffle 2;

[0055] The upper end of the support rod 3 is hinged to the shredder, and the lower end of the support rod 3 is hinged to the sliding block 31;

[0056] The power mechanism is fixedly installed on the upper baffle 1, and a transmission mechanism is installed at the power output end of the power mechanism.

[0057] Both the connecting block 21 and the sliding block 31 are mounted on the transmission mechanism. The power mechanism drives the connecting block 21 and the sliding block 31 to move in opposite directions along the length of the upper baffle 1 via the transmission mechanism.

[0058] A guide frame 5 is fixedly installed on the upper baffle 1. The guide frame 5 includes a guide rod 51, and a guide cylinder 52 is slidably installed on the guide rod 51. The guide cylinder 52 is fixedly installed on the lower baffle 2.

[0059] In practice, depending on the actual situation, a dovetail groove can be set on the edge of the lower baffle 2 and a dovetail block can be set on the upper baffle 1 to achieve a sliding connection between the upper baffle 1 and the lower baffle 2. In this embodiment, the sliding connection between the upper baffle 1 and the lower baffle 2 is achieved through the cooperation of the guide rod 51 and the guide cylinder 52. The structure is simple, easy to install, and highly practical.

[0060] The guide frame 5 also includes a crossbar 53 and a first mounting base 54. The crossbar 53 is fixedly installed on the upper baffle 1 and spans the mounting groove 11. The first mounting base 54 is fixedly installed on the upper baffle 1. The guide rod 51 is installed between the crossbar 53 and the first mounting base 54.

[0061] The free end of the guide rod 51 is supported by the crossbar 53 spanning the mounting groove 11, making the structure more stable and practical.

[0062] In this embodiment, when it is necessary to lengthen the overall length of the baffle and increase the angle between the baffle and the vertical plane, the power mechanism is operated, and the connecting block 21 is driven to move downward through the transmission mechanism, thereby driving the lower baffle 2 to move away from the upper baffle 1, so as to achieve the purpose of lengthening the overall length of the baffle.

[0063] At the same time, with the operation of the power mechanism, the sliding block 31 is driven to move upward relative to the upper baffle 1. Utilizing the characteristic that the upper end of the support rod 3 is hinged to the shredder and the overall length of the support rod 3 remains unchanged, the baffle rotates clockwise around the hinge point between the upper end of the upper baffle 1 and the shredder, thereby increasing the angle between the baffle and the vertical plane.

[0064] Conversely, if the power mechanism operates in the opposite direction, the overall length of the baffle can be shortened, while the angle between the baffle and the vertical plane can be reduced.

[0065] Example 2:

[0066] like Figures 1-5 As shown, an adjustable baffle for a vertical feeding shredder of the present invention includes:

[0067] The upper baffle 1 is hinged to the shredder at the top, and the lower end of the upper baffle 1 is provided with a mounting groove 11;

[0068] Lower baffle 2 is slidably installed in mounting groove 11 along the length direction of upper baffle 1, and connecting block 21 is fixedly installed on lower baffle 2;

[0069] The upper end of the support rod 3 is hinged to the shredder, and the lower end of the support rod 3 is hinged to the sliding block 31;

[0070] The power mechanism is fixedly installed on the upper baffle 1, and a transmission mechanism is installed at the power output end of the power mechanism.

[0071] Both the connecting block 21 and the sliding block 31 are mounted on the transmission mechanism. The power mechanism drives the connecting block 21 and the sliding block 31 to move in opposite directions along the length of the upper baffle 1 via the transmission mechanism.

[0072] The power mechanism is a controllable motor 4, and the transmission mechanism includes a first lead screw 41;

[0073] The first lead screw 41 is rotatably mounted on the upper baffle 1 and is connected to the controllable motor 4 for transmission. The connecting block 21 is screwed onto the first lead screw 41.

[0074] In practice, depending on the actual situation, a hydraulic cylinder can also be selected as the power mechanism. The extension and retraction of the hydraulic rod can be used to adjust the connecting block 21. In this embodiment, the controllable motor 4 drives the first lead screw 41 to rotate. The rotation of the first lead screw 41 can drive the lower baffle 2, on which the connecting block 21 is installed, to slide along the length direction of the upper baffle 1. The structure is simple, easy to control, and highly practical. Moreover, the screw connection between the lead screw and the nut has a self-locking function, which is more suitable for the work requirements of locking the position after adjustment in this invention, making it highly practical.

[0075] The transmission mechanism also includes a first gear 410, a second lead screw 42, and a second gear 420;

[0076] The first gear 410 is fixedly mounted on the first lead screw 41;

[0077] The second lead screw 42 is rotatably mounted on the upper baffle 1, the second gear 420 is fixedly mounted on the second lead screw 42 and meshes with the first gear 410, and the sliding block 31 is screwed onto the second lead screw 42.

[0078] In practice, depending on the actual situation, a hinged connecting rod can be selected between the connecting block 21 and the sliding block 31, and the connecting rod can be mounted on the upper baffle 1 to form a lever. The connection between the connecting block 21 and the sliding block 31 can then be completed in the form of a lever, thereby achieving the purpose of the connecting block 21 and the sliding block 31 moving in opposite directions. In this embodiment, the meshing of the first gear 410 and the second gear 420 makes the rotation directions of the first lead screw 41 and the second lead screw 42 opposite, thereby driving the connecting block 21 and the sliding block 31 to move in opposite directions. The structure is simple, easy to install, and highly practical.

[0079] A linear guide rail 43 is fixedly installed on the upper baffle 1, and a sliding block 31 is slidably installed on the linear guide rail 43.

[0080] The radial load borne by the sliding block 31 is borne by the linear guide rail 43, which avoids the radial load being directly applied to the second lead screw 42, thus preventing the second lead screw 42 from bending. This method is highly practical.

[0081] A guide frame 5 is fixedly installed on the upper baffle 1. The guide frame 5 includes a guide rod 51. A guide cylinder 52 is slidably installed on the guide rod 51. The guide cylinder 52 is fixedly installed on the lower baffle 2.

[0082] The guide frame 5 also includes a crossbar 53, a first mounting base 54, and a second mounting base 55;

[0083] The crossbar 53 is fixedly installed on the upper baffle 1 and spans the mounting groove 11. The first mounting seat 54 is fixedly installed on the upper baffle 1. The guide rod 51 is installed between the crossbar 53 and the first mounting seat 54.

[0084] The second mounting base 55 is fixedly mounted on the upper baffle 1. The linear guide rail 43 is mounted on the second mounting base 55 and the crossbar 53. The linear guide rail 43 is located between the connecting block 21 and the sliding block 31.

[0085] In practice, depending on the actual situation, the height of the sliding block 31 can be increased, and a clearance hole can be opened on the sliding block 31 to avoid the connecting block 21. At the same time, a receiving groove for accommodating the linear guide rail 43 can be opened in the mounting groove 11 of the upper baffle 1 to realize the installation of the linear guide rail 43. In this embodiment, the linear guide rail 43 is installed by the crossbar 53 and the second mounting base 55, which realizes the stable support of the sliding block 31. Furthermore, by limiting the position of the linear guide rail 43, the sliding of the linear guide rail 43 is avoided from affecting the sliding of the connecting block 21, which is highly practical.

[0086] In this embodiment, when it is necessary to lengthen the overall length of the baffle and increase the angle between the baffle and the vertical plane, the controllable motor 4 is operated to drive the first lead screw 41 to rotate clockwise. The screw connection between the first lead screw 41 and the connecting block 21 drives the connecting block 21 to move downward, thereby driving the lower baffle 2 to move away from the upper baffle 1, so as to achieve the purpose of lengthening the overall length of the baffle.

[0087] Meanwhile, with the operation of the controllable motor 4, the meshing of the first gear 410 and the second gear 420 drives the second lead screw 42 to rotate counterclockwise. The screw connection between the second lead screw 42 and the sliding block 31 drives the sliding block 31 to move upward relative to the upper baffle 1. The upper end of the support rod 3 is hinged to the shredder, and the overall length of the support rod 3 remains unchanged, so that the baffle rotates clockwise around the hinge point between the upper end of the upper baffle 1 and the shredder, thereby increasing the angle between the baffle and the vertical plane.

[0088] Conversely, when the controllable motor 4 operates in the opposite direction, the overall length of the baffle can be shortened, and the angle between the baffle and the vertical plane can be reduced.

[0089] Example 3:

[0090] like Figures 1-5 As shown, an adjustable baffle for a vertical feeding shredder of the present invention includes:

[0091] The upper baffle 1 is hinged to the shredder at the top, and the lower end of the upper baffle 1 is provided with a mounting groove 11;

[0092] Lower baffle 2 is slidably installed in mounting groove 11 along the length direction of upper baffle 1, and connecting block 21 is fixedly installed on lower baffle 2;

[0093] The upper end of the support rod 3 is hinged to the shredder, and the lower end of the support rod 3 is hinged to the sliding block 31;

[0094] The power mechanism is fixedly installed on the upper baffle 1, and a transmission mechanism is installed at the power output end of the power mechanism.

[0095] Both the connecting block 21 and the sliding block 31 are mounted on the transmission mechanism. The power mechanism drives the connecting block 21 and the sliding block 31 to move in opposite directions along the length of the upper baffle 1 via the transmission mechanism.

[0096] The power mechanism is a controllable motor 4, and the transmission mechanism includes a first lead screw 41;

[0097] The first lead screw 41 includes a first threaded section and a second threaded section, with the threads of the first threaded section and the second threaded section having opposite directions. The connecting block 21 is screwed onto the first threaded section, and the sliding block 31 is screwed onto the second threaded section.

[0098] The connecting block 21 and the sliding block 31 are supported by the first and second thread segments with opposite screw directions, thereby driving the connecting block 21 and the sliding block 31 to move in opposite directions. The structure is simple, easy to install, and highly practical.

[0099] In this embodiment, when it is necessary to increase the overall length of the baffle and increase the angle between the baffle and the vertical plane, the controllable motor 4 is operated to drive the first lead screw 41 to rotate clockwise. By using the screw connection between the first threaded section and the connecting block 21, the connecting block 21 is driven to move downward, thereby driving the lower baffle 2 to move away from the upper baffle 1, so as to achieve the purpose of increasing the overall length of the baffle.

[0100] At the same time, with the operation of the controllable motor 4, the rotation of the second thread segment, which is opposite to the thread direction of the first thread segment, drives the sliding block 31 to move upward relative to the upper baffle 1. Then, by utilizing the characteristic that the upper end of the support rod 3 is hinged to the shredder and the overall length of the support rod 3 remains unchanged, the baffle rotates clockwise around the hinge point between the upper end of the upper baffle 1 and the shredder, thereby increasing the angle between the baffle and the vertical plane.

[0101] Conversely, when the controllable motor 4 operates in the opposite direction, the overall length of the baffle can be shortened, and the angle between the baffle and the vertical plane can be reduced.

[0102] The above provides a detailed description of an adjustable baffle for a vertical material feeding and shredding machine provided by the present invention. The specific embodiments described are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An adjustable baffle for a vertical material feeding and shredding machine, characterized in that: include: The upper end of the upper baffle (1) is hinged to the shredder, and the lower end of the upper baffle (1) is provided with an installation groove (11). The lower baffle (2) is slidably installed in the mounting groove (11) along the length direction of the upper baffle (1), and a connecting block (21) is fixedly installed on the lower baffle (2). The upper end of the support rod (3) is hinged to the shredder, and the lower end of the support rod (3) is hinged to the sliding block (31). The power mechanism is fixedly installed on the upper baffle (1), and the power output end of the power mechanism is equipped with a transmission mechanism; The connecting block (21) and the sliding block (31) are both mounted on the transmission mechanism. The power mechanism drives the connecting block (21) and the sliding block (31) to move in opposite directions along the length of the upper baffle (1) via the transmission mechanism. The power mechanism drives the connecting block (21) to move downward via the transmission mechanism, thereby driving the lower baffle (2) to move away from the upper baffle (1) to increase the length of the baffle. At the same time, the power mechanism drives the sliding block (31) to move upward via the transmission mechanism. Utilizing the hinge between the upper end of the support rod (3) and the shredder, and the characteristic that the overall length of the support rod (3) remains unchanged, the baffle rotates clockwise around the hinge between the upper end of the upper baffle (1) and the shredder, thereby increasing the angle between the baffle and the vertical plane. Conversely, if the power mechanism operates in the opposite direction, the overall length of the baffle can be shortened, and the angle between the baffle and the vertical plane can be reduced.

2. The adjustable baffle for a vertical material feeding and shredding machine according to claim 1, characterized in that: A guide frame (5) is fixedly installed on the upper baffle (1). The guide frame (5) includes a guide rod (51). A guide cylinder (52) is slidably installed on the guide rod (51). The guide cylinder (52) is fixedly installed on the lower baffle (2).

3. An adjustable baffle for a vertical material feeding and shredding machine according to claim 2, characterized in that: The guide frame (5) also includes a crossbar (53) and a first mounting seat (54). The crossbar (53) is fixedly installed on the upper baffle (1) and spans the mounting groove (11). The first mounting seat (54) is fixedly installed on the upper baffle (1). The guide rod (51) is installed between the crossbar (53) and the first mounting seat (54).

4. An adjustable baffle for a vertical material feeding and shredding machine according to claim 1, characterized in that: The power mechanism is a controllable motor (4), and the transmission mechanism includes a first lead screw (41). The first lead screw (41) is rotatably mounted on the upper baffle (1) and is connected to the controllable motor (4) for transmission. The connecting block (21) is screwed onto the first lead screw (41).

5. An adjustable baffle for a vertical material feeding and shredding machine according to claim 4, characterized in that: The transmission mechanism also includes a first gear (410), a second lead screw (42), and a second gear (420). The first gear (410) is fixedly mounted on the first lead screw (41); The second lead screw (42) is rotatably mounted on the upper baffle (1), the second gear (420) is fixedly mounted on the second lead screw (42) and meshes with the first gear (410), and the sliding block (31) is screwed onto the second lead screw (42).

6. An adjustable baffle for a vertical material feeding and shredding machine according to claim 5, characterized in that: A linear guide rail (43) is fixedly installed on the upper baffle (1), and the sliding block (31) is slidably installed on the linear guide rail (43).

7. An adjustable baffle for a vertical material feeding and shredding machine according to claim 6, characterized in that: A guide frame (5) is fixedly installed on the upper baffle (1). The guide frame (5) includes a guide rod (51). A guide cylinder (52) is slidably installed on the guide rod (51). The guide cylinder (52) is fixedly installed on the lower baffle (2). The guide frame (5) also includes a crossbar (53), a first mounting base (54), and a second mounting base (55); The crossbar (53) is fixedly installed on the upper baffle (1) and spans the mounting groove (11), the first mounting seat (54) is fixedly installed on the upper baffle (1), and the guide rod (51) is installed between the crossbar (53) and the first mounting seat (54); The second mounting base (55) is fixedly mounted on the upper baffle (1), and the linear guide rail (43) is mounted on the second mounting base (55) and the crossbar (53). The linear guide rail (43) is located between the connecting block (21) and the sliding block (31).

8. An adjustable baffle for a vertical material feeding and shredding machine according to claim 1, characterized in that: The power mechanism is a controllable motor (4), and the transmission mechanism includes a first lead screw (41). The first lead screw (41) includes a first threaded section and a second threaded section, the threads of the first threaded section and the second threaded section are opposite in direction, the connecting block (21) is screwed onto the first threaded section, and the sliding block (31) is screwed onto the second threaded section.

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