Coal mine scraper machine with protection mechanism

Abstract

The invention relates to the technical field of scrapers, in particular to a coal mine scraper with a protection mechanism, which comprises a rack, a protection shell is rotatably mounted at one end of the rack, a scraper body capable of conveying a coal mine is mounted in the protection shell, and an adjusting mechanism capable of adjusting the angle of the protection shell is mounted at the other end of the rack; the protective shell is composed of a plurality of protective plates, impact and friction of a coal mine in the conveying process can be more effectively resisted, and each protective plate bears a part of impact force, so that overall stress is dispersed, and abrasion and damage of a single part are reduced; by means of the design, the protective shell is firmer and more durable, the service life of the scraper conveyor is effectively prolonged, through the ingenious matching design of the buckle assemblies, all the protective plates can be disassembled conveniently, the scraper conveyor body can be overhauled and maintained conveniently, and the single protective plate can be maintained and replaced more conveniently and rapidly.

Description

Technical Field

[0001] The invention belongs to the technical field of scraper machines, and in particular relates to a scraper machine for coal mines with a protective mechanism. Background Art

[0002] A scraper conveyor is a conveyor that uses a scraper chain to transport bulk materials in a trough. A scraper conveyor whose adjacent middle troughs can be bent to a limited extent in the horizontal and vertical planes is called a flexible scraper conveyor. The working face conveyor in which the body is bent 90 degrees at the intersection of the working face and the transport tunnel is called a "corner scraper". In the current coal mining working face, the role of the scraper conveyor is not only to transport coal and materials, but also to serve as the operating track of the coal mining machine. Therefore, it has become an indispensable main equipment in modern coal mining technology. If the scraper conveyor can maintain continuous operation, production can proceed normally. Otherwise, the entire coal mining working face will be shut down, causing the entire production to be interrupted.

[0003] In order to avoid accidental damage when working in the mine, it is necessary to install a protective cover on the scraper, but most traditional protective covers are integrally formed, which makes it inconvenient to inspect and maintain the scraper inside the protective cover. In addition, the existing scraper has a fixed inclination angle during transportation, and thus cannot be adjusted, which reduces the transportation effect. Therefore, how to overcome the above-mentioned technical problems and defects has become a key issue that needs to be solved. Summary of the invention

[0004] The purpose of the invention is to overcome the problem that most traditional protective covers in the background technology are integrally formed, which makes it inconvenient to inspect and maintain the scraper inside the protective cover, and the existing scraper has a fixed inclination angle during transportation, and thus cannot be adjusted, which reduces the transportation effect, thereby realizing a scraper for coal mines with a protective mechanism.

[0005] To achieve the above-mentioned purpose of the invention, the technical solution of the present invention is: a scraper for coal mines with a protective mechanism, comprising a frame, a protective shell is rotatably installed at one end of the frame, a scraper body that can transport coal mines is installed inside the protective shell, and an adjustment mechanism that can adjust the angle of the protective shell is installed at the other end of the frame, the protective shell is composed of a plurality of protective plates, and each of the protective plates is connected by a snap-on assembly.

[0006] In the above-mentioned scraper for coal mines with a protective mechanism, the scraper body includes a motor, a mounting shaft, a transmission gear, a transmission chain and a scraper body, and the upper and lower ends of the inner part of the protective shell are respectively rotatably installed with mounting shafts through bearing seats, and transmission gears are symmetrically installed at both ends of each mounting shaft, and transmission chains are symmetrically arranged on both sides between the two mounting shafts, and the transmission chains are meshed with the transmission gears, one of the mounting shafts is driven by a motor, and the motor is installed on the outer wall of the protective shell, and a number of scraper bodies are installed between the two transmission chains.

[0007] In the above-mentioned scraper for coal mines with a protective mechanism, the scraper body is made of polyurethane material.

[0008] In the above-mentioned scraper for coal mines with a protective mechanism, the adjusting mechanism includes a fan-shaped plate frame, a first bracket, a second bracket and an electric push rod. The fan-shaped plate frame is symmetrically fixedly connected to the frame, and a first bracket is rotatably installed on each of the fan-shaped plate frames. The second bracket is rotatably installed at one end of the two first brackets away from the fan-shaped plate frame, and the second bracket is rotatably connected to the lower end of the protective shell at one end away from the first bracket. An electric push rod is rotatably installed on the frame, and the extended end of the electric push rod is rotatably connected to the second bracket.

[0009] In the above-mentioned scraper for coal mines with a protective mechanism, the snap assembly includes a mounting frame, a snap-fit ​​plate and a snap-fit ​​plate. The mounting frame is fixedly connected to one of the protective plates, and the snap-fit ​​plate is rotatably connected to the mounting frame. The adjacent protective plates are fixedly connected to snap-fit ​​plates that can be snapped with the snap-fit ​​plate.

[0010] In the above-mentioned scraper for coal mines with a protective mechanism, a first positioning component that can prevent the snap-on buckle plate from rotating is installed on the mounting frame.

[0011] In the above-mentioned scraper for coal mines with a protective mechanism, a second positioning component is installed on the first bracket, and a plurality of through holes for plugging the second positioning component are provided on the fan-shaped plate frame, and the through holes are distributed in a fan shape.

[0012] In the above-mentioned scraper for coal mines with a protective mechanism, the first positioning assembly and the second positioning assembly have the same structure, and the first positioning assembly includes a mounting plate, a positioning shaft, a retaining ring and a spring. The mounting plate is fixedly connected to the mounting frame, and the mounting plate is slidably connected with the positioning shaft through a through hole. A retaining ring is installed on the positioning shaft, and a spring is sleeved on the positioning shaft, and the spring is located between the retaining ring and the mounting plate, and the snap-fit ​​plate is provided with a plug-in hole for the positioning shaft to be plugged in.

[0013] In the above-mentioned coal mine scraper with a protective mechanism, universal wheels are installed at the four corners of the lower end of the frame.

[0014] In the above-mentioned scraper for coal mines with a protective mechanism, a lifting mechanism is installed at the four corners of the lower end of the frame, and the lifting mechanism includes a base, a first support frame, a second support frame, a threaded block, a threaded rod, a connecting plate and a handle. The upper end of the base is symmetrically rotatably installed with a first support frame, each of the first support frames is rotatably installed with a second support frame through a threaded block, and two of the second support frames are rotatably connected to a connecting plate at one end away from the threaded block, and the connecting plate is fixedly connected to the lower end of the frame, a threaded rod is threadedly connected between the two threaded blocks, and a handle is installed at one end of the threaded rod.

[0015] Compared with the prior art, the coal mine scraper with a protective mechanism of the present invention has at least the following beneficial effects:

[0016] 1. The scraper for coal mines with a protective mechanism of the present invention, through the protective shell composed of a plurality of protective plates, can more effectively resist the impact and friction of coal mines during transportation, and each protective plate bears a part of the impact force, thereby dispersing the overall force and reducing the wear and damage of a single part; this design makes the protective shell more sturdy and durable, effectively prolonging the service life of the scraper, and through the ingenious matching design of the snap-on assembly, it is easy to disassemble each protective plate, which not only facilitates the inspection and maintenance of the scraper body, but also makes the maintenance and replacement of a single protective plate more convenient and quick.

[0017] 2. The scraper for coal mines with a protective mechanism of the present invention can adjust the angle of the protective shell through the setting of the adjusting mechanism, and then the coal can be transported to different heights as needed, thereby effectively improving the conveying effect of the scraper and improving the applicability of the scraper; and through the matching design of the second positioning component, when the protective shell is rotated to a suitable angle, the adjusting mechanism can be positioned, thereby effectively improving the stability of the scraper.

[0018] 3. The scraper for coal mines with a protective mechanism of the present invention facilitates the movement of the frame through the setting of universal wheels, and thus facilitates the movement of the scraper to a suitable position for work. Through the coordinated design of the lifting mechanism, when the scraper is working, the universal wheels can be kept away from the ground, thereby effectively preventing the scraper from affecting its work due to random movement, and also effectively improving the overall stability of the scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a scraper for coal mines with a protective mechanism of the present invention;

[0020] Figure 2It is a schematic diagram of the installation structure of the protective housing, buckle assembly and scraper body of the scraper for coal mine with a protective mechanism of the present invention;

[0021] Figure 3 yes Figure 2 A local enlarged view of point A in FIG.

[0022] Figure 4 It is a partial exploded structural schematic diagram of the first positioning assembly and the buckle assembly of the scraper for coal mine with a protective mechanism of the present invention;

[0023] Figure 5 It is a schematic diagram of the installation structure of the frame, adjustment mechanism, universal wheel and lifting mechanism of the scraper for coal mine with a protection mechanism of the present invention;

[0024] Figure 6 yes Figure 5 A local enlarged view of point B in FIG.

[0025] Figure 7 It is a structural schematic diagram of the lifting mechanism of the scraper for coal mine with a protective mechanism of the present invention.

[0026] In the figure: 1. frame; 2. protective shell; 201. protective plate; 3. snap assembly; 301. mounting frame; 302. snap-on buckle plate; 303. snap-on plate; 4. scraper body; 401. motor; 402. mounting shaft; 403. transmission gear; 404. transmission chain; 405. scraper body; 5. adjustment mechanism; 501. fan-shaped plate frame; 502. first bracket; 503. second bracket; 504. electric push rod; 6. universal wheel; 7. lifting mechanism; 701. base; 702. first support frame; 703. second support frame; 704. threaded block; 705. threaded rod; 706. connecting plate; 707. handle; 8. first positioning assembly; 801. mounting plate; 802. positioning shaft; 803. retaining ring; 804. spring; 9. second positioning assembly. DETAILED DESCRIPTION

[0027] The scraper for coal mine with a protection mechanism of the present invention is described in more detail below with reference to the accompanying drawings and through specific implementation methods.

[0028] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] Embodiment 1:

[0030] The present embodiment discloses a scraper for coal mines with a protective mechanism. The protective shell 2 is composed of a plurality of protective plates 201, which can more effectively resist the impact and friction of coal mines during transportation. Each protective plate 201 bears a part of the impact force, thereby dispersing the overall force and reducing the wear and damage of a single part. This design makes the protective shell 2 more sturdy and durable, effectively extending the service life of the scraper, and the clever matching design of the buckle assembly 3 facilitates the disassembly of each protective plate 201, which not only facilitates the inspection and maintenance of the scraper body 4, but also makes the maintenance and replacement of a single protective plate 201 more convenient and quick. Figure 1-Figure 6 It mainly includes a frame 1, a protective shell 2 is rotatably installed at one end of the frame 1, a scraper body 4 for conveying coal mines is installed inside the protective shell 2, and an adjusting mechanism 5 for adjusting the angle of the protective shell 2 is installed at the other end of the frame 1. The protective shell 2 is composed of a plurality of protective plates 201, and each protective plate 201 is connected by a snap assembly 3; through the setting of the scraper body 4, the coal mine can be transported; through the setting of the adjusting mechanism 5, the angle of the protective shell 2 can be adjusted, and then the coal mine can be conveyed to different heights as needed, thereby effectively improving the conveying effect of the scraper machine and improving the applicability of the scraper machine.

[0031] In order to transport coal mines. In this embodiment, refer to Figure 1 and Figure 2 The scraper body 4 includes a motor 401, a mounting shaft 402, a transmission gear 403, a transmission chain 404 and a scraper body 405. The mounting shafts 402 are rotatably mounted at the upper and lower ends of the protective shell 2 through bearing seats, and the transmission gears 403 are symmetrically mounted at both ends of each mounting shaft 402. The transmission chains 404 are symmetrically arranged on both sides between the two mounting shafts 402, and the transmission chains 404 are meshed and connected with the transmission gears 403. One of the mounting shafts 402 is driven by the motor 401, and the motor 401 is mounted on the outer wall of the protective shell 2. A plurality of scraper bodies 405 are mounted between the two transmission chains 404;

[0032] When the coal needs to be transported, the coal to be transported flows into the protective shell 2 from the feed end, and the motor 401 is started. The motor 401 drives the installation shaft 402 to rotate, and the installation shaft 402 drives the transmission gear 403 to rotate. The transmission gear 403 drives the transmission chain 404 to move, and the transmission chain 404 drives the scraper body 405 to move, and then the coal is transported through the scraper body 405, and finally flows out from the discharge end of the protective shell 2.

[0033] In order to improve the wear resistance of the scraper body 405. In this embodiment, the scraper body 405 is made of polyurethane material, which has extremely high wear resistance and can significantly reduce the cost and process errors caused by wear during repeated use. This feature enables the scraper body 405 to perform well in high-intensity operations such as scraping coal, and can maintain a stable scraping effect for a long time, reduce the replacement frequency, and improve the working efficiency; at the same time, it is also easy to clean and maintain, greatly reducing the maintenance cost and time cost.

[0034] In order to be able to transport the coal to different heights as needed. In this embodiment, refer to Figure 1 and Figure 5 The adjusting mechanism 5 includes a fan-shaped plate frame 501, a first bracket 502, a second bracket 503 and an electric push rod 504. The fan-shaped plate frame 501 is symmetrically fixedly connected to the frame 1, and the first bracket 502 is rotatably installed on each fan-shaped plate frame 501. The second bracket 503 is rotatably installed at one end of the two first brackets 502 away from the fan-shaped plate frame 501, and the second bracket 503 is rotatably connected to the lower end of the protective shell 2 at one end away from the first bracket 502. The electric push rod 504 is rotatably installed on the frame 1, and the extended end of the electric push rod 504 is rotatably connected to the second bracket 503;

[0035] During specific use, the electric push rod 504 is started, and the electric push rod 504 can rotate the second bracket 503, and the first bracket 502 is also rotated as needed, so that the angle of the protective shell 2 can be adjusted, so that the coal can be transported to different heights as needed.

[0036] In order to facilitate the installation and removal of each protective plate 201. Figure 1 , Figure 2 , Figure 3 and Figure 4 The buckle assembly 3 includes a mounting frame 301, a buckle plate 302 and a snap plate 303. The mounting frame 301 is fixedly connected to one of the protective plates 201. The buckle plate 302 is rotatably connected to the mounting frame 301. The snap plate 303 that can be buckled with the buckle plate 302 is fixedly connected to the adjacent protective plate 201.

[0037] When the protective plate 201 needs to be disassembled, rotate the snap plate 302 so that the snap plate 302 is no longer snapped with the locking plate 303. Similarly, rotate the snap plates 302 in other locking assemblies 3. At this time, the protective plate 201 can be disassembled quickly and conveniently. When the protective plate 201 needs to be installed, rotate the snap plate 302 as needed until the snap plate 302 and the locking plate 303 are snapped together. At this time, due to the unique appearance design of the snap plate 302 and the locking plate 303, when the snap plate 302 and the locking plate 303 are snapped together, the snap plate 302 is not easy to rotate, which can make the snapping effect better.

[0038] Embodiment 2:

[0039] On the basis of the first embodiment, the first positioning assembly 8 can be used to limit the snap plate 302, thereby effectively preventing the snap plate 302 from rotating, thereby achieving a better snapping effect between the snap plate 302 and the snap plate 303. Figure 3 , Figure 4 , Figure 5 and Figure 6 A first positioning component 8 is installed on the mounting frame 301 to prevent the snap-on buckle plate 302 from rotating; a second positioning component 9 is installed on the first bracket 502, and a plurality of through holes for the second positioning component 9 to be plugged in are opened on the fan-shaped plate frame 501, and the through holes are distributed in a fan shape; through the matching design of the second positioning component 9 and the through holes, and the through holes are distributed in a fan shape, when the first bracket 502 is rotated to a suitable position, the second positioning component 9 can be inserted into the through holes, and then the first bracket 502 can be limited, thereby effectively improving the stability of the scraper.

[0040] In this embodiment, refer to Figure 3 , Figure 4 , Figure 5 and Figure 6 The first positioning assembly 8 and the second positioning assembly 9 have the same structure. The first positioning assembly 8 includes a mounting plate 801, a positioning shaft 802, a retaining ring 803 and a spring 804. The mounting plate 801 is fixedly connected to the mounting frame 301. The mounting plate 801 is slidably connected with the positioning shaft 802 through a through hole. The retaining ring 803 is installed on the positioning shaft 802. The spring 804 is knotted on the positioning shaft 802, and the spring 804 is located between the retaining ring 803 and the mounting plate 801. The snap-fit ​​buckle plate 302 is provided with a plug-in hole for the positioning shaft 802 to be plugged in.

[0041] During specific use, when limiting the snap plate 302, release the positioning shaft 802, and under the action of the elastic force of the spring 804, the positioning shaft 802 is inserted into the plug hole, thereby effectively preventing the snap plate 302 from rotating. When the snap plate 302 needs to be rotated, pull the plug shaft until the plug shaft moves out of the plug hole. At this time, the snap plate 302 can be rotated, which is convenient and quick; when the first bracket 502 needs to be limited, repeat the above steps. When the first bracket 502 moves to a suitable position, since the through holes are fan-shaped, the plug shaft can be inserted into the corresponding through hole, thereby limiting the first bracket 502 and preventing the first bracket 502 from rotating at will, thereby improving the overall stability of the scraper.

[0042] Embodiment three:

[0043] The same points as the above embodiment will not be described in detail, but the difference is that:

[0044] In order to facilitate the movement of the rack 1. In this embodiment, refer to Figure 1 and Figure 5 Universal wheels 6 are installed at the four corners of the lower end of the frame 1, and the universal wheels 6 are used to facilitate the movement of the frame 1, thereby facilitating the movement of the frame 1 to a suitable position as needed.

[0045] In order to improve the overall stability of the scraper. In this embodiment, refer to Figure 1 , Figure 5 and Figure 7 , the four corners of the lower end of the frame 1 are equipped with a lifting mechanism 7, the lifting mechanism 7 includes a base 701, a first support frame 702, a second support frame 703, a threaded block 704, a threaded rod 705, a connecting plate 706 and a handle 707, the upper end of the base 701 is symmetrically rotatably equipped with a first support frame 702, each first support frame 702 is rotatably equipped with a second support frame 703 through a threaded block 704, and one end of the two second support frames 703 away from the threaded block 704 is rotatably connected to a connecting plate 706, and the connecting plate 706 is fixedly connected to the lower end of the frame 1, a threaded rod 705 is threadedly connected between the two threaded blocks 704, and a handle 707 is installed at one end of the threaded rod 705;

[0046] During specific use, the threaded rod 705 is rotated by the handle 707, and with the cooperation of the threaded block 704, the first support frame 702 and the second support frame 703 can be rotated, and then the height of the base 701 can be adjusted until the universal wheel 6 leaves the ground, thereby effectively improving the overall stability of the scraper.

[0047] The working principle of the scraper for coal mines with a protective mechanism of the present invention is as follows: when the coal needs to be transported, the coal flows into the protective shell 2 from the feed end of the protective shell 2, and then the motor 401 is started, and the motor 401 drives the installation shaft 402 to rotate, and the installation shaft 402 drives the transmission gear 403 to rotate, and the transmission gear 403 drives the transmission chain 404 to move, and the transmission chain 404 drives the scraper body 405 to move, so that the scraper body 405 scrapes the coal, thereby transporting the coal, and finally flows out from the discharge end of the protective shell 2.

[0048] It should be noted that, in the specific implementation of the device, the structures described in the drawings of this specification are not fixed and unchanging implementation methods. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. In addition, the drawings of this specification and the drawings of the abstract are only schematic diagrams and do not represent the specific structure and actual quantity of the specific implementation.

[0049] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by a person of ordinary skill in the field to which the invention belongs. The use of "one" or "an" and other similar words in the specification and claims of this application does not necessarily indicate a quantitative limitation. "Include" or "comprises" and other similar words mean that the elements or components appearing before the word include the elements or components listed after the word and their equivalents, without excluding other elements or components. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0050] The exemplary implementation modes of the present invention are described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and variations can be made to the above-mentioned specific embodiments, and various combinations of the technical features and structures proposed in the present invention can be made without exceeding the protection scope of the present invention.

Claims

1. A scraper for coal mines with a protective mechanism, comprising a frame (1), characterized in that: A protective housing (2) is rotatably mounted on one end of the frame (1); A scraper body (4) capable of transporting coal is installed inside the protective shell (2); The other end of the frame (1) is provided with an adjustment mechanism (5) capable of adjusting the angle of the protective shell (2); The protective shell (2) is composed of a plurality of protective plates (201), and each of the protective plates (201) is connected via a snap-fit ​​assembly (3).

2. The scraper for coal mines with a protective mechanism according to claim 1, characterized in that: The scraper body (4) comprises a motor (401), a mounting shaft (402), a transmission gear (403), a transmission chain (404) and a scraper body (405); The upper and lower ends of the protective shell (2) are rotatably mounted with mounting shafts (402) through bearing seats, respectively; transmission gears (403) are symmetrically mounted at both ends of each mounting shaft (402); transmission chains (404) are symmetrically arranged on both sides between the two mounting shafts (402); and the transmission chains (404) are meshingly connected with the transmission gears (403); one of the mounting shafts (402) is driven by a motor (401); the motor (401) is mounted on the outer wall of the protective shell (2); and a plurality of scraper bodies (405) are mounted between the two transmission chains (404).

3. The scraper for coal mines with a protective mechanism according to claim 2, characterized in that: The scraper body (405) is made of polyurethane material.

4. The scraper for coal mine with a protection mechanism according to claim 1, characterized in that: The regulating mechanism (5) comprises a fan-shaped plate frame (501), a first bracket (502), a second bracket (503) and an electric push rod (504); The frame (1) is symmetrically fixedly connected with a fan-shaped plate frame (501), each of the fan-shaped plate frames (501) is rotatably mounted with a first bracket (502), and the ends of the two first brackets (502) away from the fan-shaped plate frame (501) are rotatably mounted with a second bracket (503), and the ends of the second brackets (503) away from the first brackets (502) are rotatably connected to the lower end of the protective shell (2), and an electric push rod (504) is rotatably mounted on the frame (1), and the extended end of the electric push rod (504) is rotatably connected to the second bracket (503).

5. The scraper for coal mines with a protective mechanism according to claim 4, characterized in that: The buckle assembly (3) comprises a mounting frame (301), a buckle plate (302) and a snap plate (303); The mounting frame (301) is fixedly connected to one of the protective plates (201), a snap-fit ​​buckle plate (302) is rotatably connected to the mounting frame (301), and a snap-fit ​​plate (303) that can be fastened with the snap-fit ​​buckle plate (302) is fixedly connected to the adjacent protective plate (201).

6. The scraper for coal mines with a protection mechanism according to claim 5, characterized in that: The mounting frame (301) is provided with a first positioning assembly (8) which can prevent the snap-fit ​​buckle plate (302) from rotating.

7. The scraper for coal mine with a protection mechanism according to claim 6, characterized in that: The first bracket (502) is provided with a second positioning component (9), and the fan-shaped plate frame (501) is provided with a plurality of through holes for the second positioning component (9) to be plugged in, and the through holes are distributed in a fan shape.

8. The scraper for coal mine with a protection mechanism according to claim 7, characterized in that: The first positioning assembly (8) and the second positioning assembly (9) have the same structure, and the first positioning assembly (8) comprises a mounting plate (801), a positioning shaft (802), a retaining ring (803) and a spring (804); The mounting plate (801) is fixedly connected to the mounting frame (301); a positioning shaft (802) is slidably connected to the mounting plate (801) via a through hole; a retaining ring (803) is installed on the positioning shaft (802); a spring (804) is sleeved on the positioning shaft (802), and the spring (804) is located between the retaining ring (803) and the mounting plate (801); and a plug-in hole for the positioning shaft (802) to be plugged in is provided on the snap-fit ​​plate (302).

9. The scraper for coal mine with a protection mechanism according to any one of claims 1 to 8, characterized in that: Universal wheels (6) are installed at the four corners of the lower end of the frame (1).

10. The scraper for coal mine with a protection mechanism according to claim 9, characterized in that: The four corners of the lower end of the frame (1) are equipped with a lifting mechanism (7), and the lifting mechanism (7) comprises a base (701), a first support frame (702), a second support frame (703), a threaded block (704), a threaded rod (705), a connecting plate (706) and a handle (707); A first support frame (702) is symmetrically rotatably mounted on the upper end of the base (701); each of the first support frames (702) is rotatably mounted with a second support frame (703) via a threaded block (704); one end of the two second support frames (703) away from the threaded block (704) is rotatably connected to a connecting plate (706); the connecting plate (706) is fixedly connected to the lower end of the frame (1); a threaded rod (705) is threadedly connected between the two threaded blocks (704); a handle (707) is mounted on one end of the threaded rod (705).

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