Material supplementing device convenient to meter for coating production

The feeding device addresses the inflexibility of conventional systems by using a multi-component system with adjustable paths and telescopic rods to accurately meter paint production materials, enhancing adaptability and precision.

CN222241112UActive Publication Date: 2024-12-27DONGGUAN ZHONGYING PAINT CO LTD
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Patent Information

Application Number
CN202420868799.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-25
Publication Date
2024-12-27
Estimated Expiration
2034-04-25

AI Technical Summary

Technical Problem

Conventional paint production metering feeding devices struggle to adjust the specific amount of supplementary materials, limiting their flexibility and application scope.

Method used

A feeding device with a base, moving component, material storage, supporting, metering, feeding, and adjusting components, utilizing conveyor belts, electric telescopic rods, and adjustable paths to flexibly control the amount of material replenished based on production needs.

Benefits of technology

Enhances the flexibility and practical value of the device by allowing precise adjustment of material amounts, improving its adaptability to various production requirements.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of material supplementing devices convenient to meter for coating production, in particular to a material supplementing device convenient to meter for coating production, and solves the problems that in the process of using the material supplementing device, most devices can only supplement materials with a fixed quantity, the specific quantity of the supplemented materials is often difficult to adjust, and the material supplementing efficiency is low. The requirements of supplementing different quantities of coatings are difficult to meet, so that the application range of the device is limited, and the use flexibility of the device is influenced. The device comprises a moving assembly, a material storage assembly, a supporting assembly, an adjusting assembly, a metering assembly and a material supplementing assembly. Compared with a traditional material supplementing device, the material supplementing device has the advantages that the specific quantity of supplemented materials is difficult to adjust, and the requirement for adjusting the quantity of the supplemented materials according to actual production and processing needs is difficult to meet, the material supplementing quantity is adjusted according to the actual production requirements in a mode of flexibly adjusting the volume of the material supplementing tank, and the use flexibility of the device is improved; the device practical value is enhanced.
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Description

Technical Field

[0001] The utility model relates to the technical field of a convenient metering feeding device for paint production, in particular to a convenient metering feeding device for paint production. Background Art

[0002] Paint is a common building material and is widely used for decoration and protection of walls, furniture and other surfaces. With the advancement of science and technology, paint has undergone many innovations and improvements to meet the ever-changing market demands and environmental protection requirements. The application range of paint is also very wide. In addition to decorating and protecting surfaces, paint can also be used for marking and identification. In the industrial field, paint can be used for rust prevention, anti-corrosion and insulation treatment. In addition, paint can also be used to change the physical properties of the surface. In summary, paint is an important building material that improves environmental quality and quality of life by decorating and protecting surfaces. However, most paint production uses a convenient metering feeding device. During the use of the feeding device, most of them can only replenish a fixed amount of material. It is often difficult to adjust the specific amount of replenished material, and it is difficult to meet the requirements of different amounts of paint feeding needs, resulting in a limited scope of application of the device and affecting the flexibility of the device. Utility Model Content

[0003] In order to overcome the problem that most of the convenient metering feeding devices used in most coating production are difficult to adjust the specific amount of supplementary materials, it is often difficult to meet the problem of adjusting the amount of supplementary materials according to actual production and processing needs.

[0004] The technical solution of the utility model is: a feeding device which is convenient for metering in paint production, comprising a base, a moving component, a material storage component, a supporting component, a metering component, a feeding component, an adjusting component and a paint tank; a moving component is arranged on the bottom surface of the base, a material storage component is arranged on one side of the base, a supporting component is arranged on the other side of the base, a metering component is arranged on one side of the supporting component, a feeding component is arranged on one side of the metering component, a paint tank is arranged below the feeding component, and an adjusting component is arranged on one side of the feeding component.

[0005] Preferably, a base is provided to place the paint tank, and the position of the base is flexibly moved by using a moving component. After the base is moved to a specified position, the required material is replenished by using a material storage component storage device, and the metering component is supported and fixed by using a supporting component. The amount of replenished material is adjusted according to actual production needs by using the metering component. Subsequently, the material is injected into the paint tank by using the replenishing component. At the same time, the material conveying path of the replenishing component is adjusted by using the adjusting component, thereby achieving the effect of adjusting the replenishing amount according to actual production needs, improving the flexibility of the device, and enhancing the practical value of the device.

[0006] Furthermore, the moving component includes a conveyor belt, a universal pulley and a first electric telescopic rod; a conveyor belt is arranged on one side of the base, a universal pulley is arranged on the bottom of the base, and multiple groups of universal pulleys are arranged; a first electric telescopic rod is also arranged on the bottom of the base, and multiple groups of first electric telescopic rods are arranged; the position of the paint tank is moved by the conveyor belt, the universal pulley is rotated to move the base, and the height of the universal pulley is extended and retracted, thereby achieving the effect of flexibly moving the position of the device.

[0007] Furthermore, the material storage assembly includes a first support rod, a first fixed plate, a material storage tank and a feed pipe; a first support rod is arranged on one side of the base, two groups of the first support rods are arranged, a first fixed plate is arranged at one end of the first support rod, a material storage tank is arranged on one side of the first fixed plate, and a feed pipe is arranged on one side of the material storage tank; the first fixed plate is fixedly supported by the first support rod, the position of the material storage tank is fixed by the first fixed plate, the material storage tank is stored in the paint, and the paint is injected into the material storage tank through the feed pipe.

[0008] Furthermore, the supporting assembly includes a second electric telescopic rod, a second fixed plate, a second support rod, a third support rod and a connecting spring; a second electric telescopic rod is arranged on one side of the base, a second fixed plate is arranged at one end of the second electric telescopic rod, a second support rod is also arranged on one side of the base, a third support rod is arranged inside the second support rod, the third support rod and the second support rod are slidably connected to each other, and a connecting spring is arranged on one side of the third support rod; the height of the second fixed plate is adjusted by extending and retracting the second electric telescopic rod, the metering assembly is fixedly supported by the second fixed plate, the third support rod is fixed by the second support rod, the second fixed plate is further fixedly supported by the third support rod, the connecting spring is extended and retracted by moving the third support rod, and the third support rod is connected by the connecting spring.

[0009] Furthermore, the metering component includes a feeding tank, a scale line, a third electric telescopic rod, a first connecting rod and a piston; a feeding tank is arranged on one side of the second fixed plate, a scale line is arranged on the outside of the feeding tank, a third electric telescopic rod is also arranged on one side of the second fixed plate, a first connecting rod is arranged at one end of the third electric telescopic rod, and a piston is arranged at one end of the first connecting rod; the material to be replenished is stored in the feeding tank, the material height in the feeding tank is observed by using the scale line, the height of the first connecting rod is adjusted by telescoping the third electric telescopic rod, the first connecting rod is used to connect the fixed piston, and the height of the piston is adjusted in the feeding tank to flexibly control the amount of material to be replenished.

[0010] Furthermore, the feeding assembly includes a water pump, a first feeding pipe, a second feeding pipe, an injection pipe, a spherical shell, a connecting ball and a first groove; a water pump is arranged on the bottom surface of the first fixed plate, a first feeding pipe is arranged on one side of the water pump, a second feeding pipe is arranged at one end of the first feeding pipe, an injection pipe is arranged on the bottom surface of the second fixed plate, a spherical shell is arranged on the inner side of the injection pipe, a connecting ball is arranged inside the spherical shell, the connecting ball and the spherical shell are rotatably connected to each other, a first groove is provided on one side of the connecting ball, and multiple groups of the first grooves are provided; the water pump is started to inject the material in the storage tank into the first feeding pipe, the material is transported to the second feeding pipe by the first feeding pipe, the material is transported to the injection pipe by the second feeding pipe, the material is injected into the paint tank by the injection pipe, the position of the connecting ball is fixed by the spherical shell, the connecting ball is rotated to adjust the material conveying path, and the first groove is used to penetrate the connecting ball.

[0011] Furthermore, the adjustment component includes a fourth electric telescopic rod, a first rotating shaft, a second connecting rod and a second rotating shaft; a fourth electric telescopic rod is arranged on the bottom surface of the second fixed plate, a first rotating shaft is arranged at one end of the fourth electric telescopic rod, a second connecting rod is arranged at one end of the first rotating shaft, a second rotating shaft is arranged at one end of the second connecting rod, and the other end of the second rotating shaft is connected to the connecting ball; the height of the first rotating shaft is adjusted by telescoping the fourth electric telescopic rod, the second rotating shaft is rotated and connected to the second connecting rod, the second rotating shaft is fixedly connected to the second connecting rod, and the second rotating shaft is rotated to drive the connecting ball to rotate, thereby flexibly adjusting the material replenishment path to achieve the effect.

[0012] Beneficial effects of the utility model:

[0013] 1. Compared with the traditional coating production feeding device which is convenient for metering, most of them use feeding pipes to feed materials. Most of them can only feed a fixed amount of materials. It is often difficult to adjust the specific amount of the supplementary materials and it is difficult to meet the requirements of different amounts of coating feeding. As a result, the application scope of the device is limited. By flexibly adjusting the volume of the feeding tank, the feeding amount can be adjusted according to the actual production needs, which improves the flexibility of the device and enhances its practical value.

[0014] 2. When adjusting the amount of replenished materials, the height of the first connecting rod is adjusted by extending and retracting the third electric telescopic rod, thereby driving the piston to move up and down in the replenishing tank. After observing the scale line and moving the piston to the specified position, the water pump is started to inject the material in the storage tank into the first conveying pipe, and the material is transported to the second conveying pipe through the first conveying pipe, and the material is transported to the injection pipe through the second conveying pipe, and the material is injected into the paint tank through the injection pipe. The height of the first rotating shaft is adjusted by contracting the fourth electric telescopic rod, and the position of the second connecting rod is driven to move, thereby driving the second rotating shaft to rotate, driving the connecting sphere in the spherical shell to rotate, and moving the first groove to make the injection pipe pass through from top to bottom, so as to solve the problem that most replenishing devices are difficult to adjust the specific amount of replenished materials, and it is difficult to meet the demand for adjusting the amount of replenished materials according to actual production and processing needs, thereby improving the flexibility of the device;

[0015] 3. When performing the refilling operation, turn the universal pulley to move the base position. After moving the device to the specified position, extend the first electric telescopic rod to lift the universal pulley so that the universal pulley is suspended in the air. Use the first electric telescopic rod to fix the support base, and use the first support rod to fix the first fixed plate. Use the feed pipe to inject the paint into the storage tank, then turn the conveyor belt to move the paint tank position, move the paint tank to just below the injection pipe, retract the second electric telescopic rod to lower the height of the second fixed plate, drive the third support rod to move downward on the second support rod, squeeze the connecting spring to fix the second fixed plate, move the injection pipe to the mouth of the paint tank, and inject a certain amount of material in the refill tank into the paint tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The three-dimensional structure schematic diagram of a convenient metering feeding device for coating production of the utility model is shown;

[0017] Figure 2 The three-dimensional structure diagram of the material storage component of a material replenishing device for convenient metering in coating production of the utility model is shown;

[0018] Figure 3 The three-dimensional structure diagram of the supporting assembly of a convenient metering feeding device for coating production of the utility model is shown;

[0019] Figure 4 The present invention shows a schematic diagram of the three-dimensional structure of a metering component of a convenient metering feeding device for coating production;

[0020] Figure 5 The present invention shows a schematic diagram of the three-dimensional structure of a feeding component of a feeding device for convenient metering in coating production;

[0021] Figure 6Shown is a three-dimensional structural schematic diagram of an adjustment component of a feeding device that is convenient for metering in paint production according to the utility model.

[0022] Description of the accompanying drawings: 1. base; 2. moving assembly; 3. material storage assembly; 4. supporting assembly; 5. metering assembly; 6. material replenishing assembly; 7. adjusting assembly; 8. paint tank; 201. conveyor belt; 202. universal pulley; 203. first electric telescopic rod; 301. first support rod; 302. first fixed plate; 303. material storage tank; 304. feeding pipe; 401. second electric telescopic rod; 402. second fixed plate; 403. second support rod; 404. first Three support rods; 405, connecting spring; 501, feeding tank; 502, scale line; 503, third electric telescopic rod; 504, first connecting rod; 505, piston; 601, water pump; 602, first feed pipe; 603, second feed pipe; 604, injection pipe; 605, spherical shell; 606, connecting sphere; 607, first groove; 701, fourth electric telescopic rod; 702, first rotating shaft; 703, second connecting rod; 704, second rotating shaft. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] See also Figure 1 The utility model provides an embodiment: a feeding device for convenient metering in paint production, comprising a base 1, a moving component 2, a material storage component 3, a supporting component 4, a metering component 5, a feeding component 6, an adjusting component 7 and a paint tank 8; the moving component 2 is arranged on the bottom surface of the base 1, the material storage component 3 is arranged on one side of the base 1, the supporting component 4 is arranged on the other side of the base 1, the metering component 5 is arranged on one side of the supporting component 4, the feeding component 6 is arranged on one side of the metering component 5, the paint tank 8 is arranged below the feeding component 6, and the adjusting component 7 is arranged on one side of the feeding component 6.

[0025] See also Figure 2In this embodiment, the moving assembly 2 includes a conveyor belt 201, a universal pulley 202 and a first electric telescopic rod 203; a conveyor belt 201 is arranged on one side of the base 1, a universal pulley 202 is arranged on the bottom surface of the base 1, and multiple groups of universal pulleys 202 are arranged, and a first electric telescopic rod 203 is also arranged on the bottom surface of the base 1, and multiple groups of first electric telescopic rods 203 are arranged. The position of the paint tank 8 is moved by the conveyor belt 201, the universal pulley 202 is rotated to move the base 1, and the first electric telescopic rod 203 is extended to adjust the height of the universal pulley 202, thereby achieving the effect of flexibly moving the position of the device; the storage assembly 3 includes There are a first support rod 301, a first fixed plate 302, a storage tank 303 and a feeding pipe 304; a first support rod 301 is arranged on one side of the base 1, and two groups of first support rods 301 are arranged, a first fixed plate 302 is arranged at one end of the first support rod 301, a storage tank 303 is arranged on one side of the first fixed plate 302, and a feeding pipe 304 is arranged on one side of the storage tank 303, the first support rod 301 is used to fix the first fixed plate 302, the first fixed plate 302 is used to fix the position of the storage tank 303, the storage tank 303 is used to store paint, and the paint is injected into the storage tank 303 through the feeding pipe 304.

[0026] See also Figure 3-4 In this embodiment, the support assembly 4 includes a second electric telescopic rod 401, a second fixed plate 402, a second support rod 403, a third support rod 404 and a connecting spring 405; a second electric telescopic rod 401 is arranged on one side of the base 1, a second fixed plate 402 is arranged at one end of the second electric telescopic rod 401, a second support rod 403 is also arranged on one side of the base 1, a third support rod 404 is arranged inside the second support rod 403, the third support rod 404 and the second support rod 403 are slidably connected to each other, a connecting spring 405 is arranged on one side of the third support rod 404, the height of the second fixed plate 402 is adjusted by telescoping the second electric telescopic rod 401, the second fixed plate 402 is used to fix and support the metering assembly 5, the third support rod 404 is fixed by the second support rod 403, the second fixed plate 402 is further fixed and supported by the third support rod 404, the connecting spring 405 is telescoped by moving the third support rod 404, and the third support rod 404 is connected by the connecting spring 405;

[0027] The metering component 5 includes a feeding tank 501, a scale line 502, a third electric telescopic rod 503, a first connecting rod 504 and a piston 505; a feeding tank 501 is arranged on one side of the second fixed plate 402, a scale line 502 is arranged on the outside of the feeding tank 501, a third electric telescopic rod 503 is also arranged on one side of the second fixed plate 402, a first connecting rod 504 is arranged at one end of the third electric telescopic rod 503, and a piston 505 is arranged at one end of the first connecting rod 504. The material to be replenished is stored in the feeding tank 501, the scale line 502 is used to observe the material height in the feeding tank 501, the height of the first connecting rod 504 is adjusted by telescoping the third electric telescopic rod 503, the first connecting rod 504 is used to connect and fix the piston 505, and the height of the piston 505 is adjusted in the feeding tank 501 to flexibly control the amount of material to be replenished.

[0028] See also Figure 5-6 The feeding assembly 6 includes a water pump 601, a first feeding pipe 602, a second feeding pipe 603, an injection pipe 604, a spherical shell 605, a connecting ball 606 and a first groove 607; the water pump 601 is arranged on the bottom surface of the first fixed plate 302, the first feeding pipe 602 is arranged on one side of the water pump 601, the second feeding pipe 603 is arranged on one end of the first feeding pipe 602, the injection pipe 604 is arranged on the bottom surface of the second fixed plate 402, the spherical shell 605 is arranged on the inner side of the injection pipe 604, the connecting ball 606 is arranged inside the spherical shell 605, and the connecting ball 606 and the spherical shell 605 are rotatably connected to each other, a first groove 607 is provided on one side of the connecting ball 606, and the first groove 607 is provided with multiple groups. The water pump 601 is started to inject the material in the storage tank 303 into the first delivery pipe 602, and the material is transported to the second delivery pipe 603 by the first delivery pipe 602, and the material is transported to the injection pipe 604 by the second delivery pipe 603, and the material is injected into the coating tank 8 by the injection pipe 604. The position of the connecting ball 606 is fixed by the spherical shell 605, and the connecting ball 606 is rotated to adjust the material conveying path, and the connecting ball 606 is penetrated by the first groove 607;

[0029] The adjusting assembly 7 includes a fourth electric telescopic rod 701, a first rotating shaft 702, a second connecting rod 703 and a second rotating shaft 704; the fourth electric telescopic rod 701 is arranged on the bottom surface of the second fixed plate 402, one end of the fourth electric telescopic rod 701 is arranged with the first rotating shaft 702, one end of the first rotating shaft 702 is arranged with the second connecting rod 703, one end of the second connecting rod 703 is arranged with the second rotating shaft 704, and the other end of the second rotating shaft 704 is connected to the connecting ball 606. The height of the first rotating shaft 702 is adjusted by telescoping the fourth electric telescopic rod 701, the first rotating shaft 702 is used to rotate and connect the second connecting rod 703, and the second connecting rod 703 is fixedly connected to the second rotating shaft 704, and the second rotating shaft 704 is rotated to drive the connecting ball 606 to rotate, thereby flexibly adjusting the material replenishment path to achieve the effect.

[0030] When the device is in a fixed position, the universal pulley 202 is rotated to move the base 1. After the device is moved to a designated position, the first electric telescopic rod 203 is extended to lift the universal pulley 202 so that the universal pulley 202 is suspended in the air. The base 1 is fixedly supported by the first electric telescopic rod 203, and the first fixed plate 302 is fixedly supported by the first support rod 301. The paint is injected into the storage tank 303 by the feeding pipe 304. Then, the conveyor belt 201 is rotated to move the paint tank 8 to a position directly below the injection pipe 604.

[0031] When adjusting the amount of replenished material, the height of the first connecting rod 504 is adjusted by extending the third electric telescopic rod 503, thereby driving the piston 505 to move up and down in the replenishing tank 501. After observing the scale line 502 and moving the piston 505 to the specified position, the water pump 601 is started to inject the material in the storage tank 303 into the first delivery pipe 602, and the first delivery pipe 602 is used to transport the material to the second delivery pipe 603, and the second delivery pipe 603 is used to transport the material to the injection pipe 604, and the injection pipe 604 is used to inject the material into the coating tank 8;

[0032] When performing the material filling operation, the second electric telescopic rod 401 is retracted to lower the height of the second fixed plate 402, driving the third support rod 404 to move downward on the second support rod 403, squeezing the connecting spring 405 to fix and support the second fixed plate 402, moving the injection pipe 604 to the mouth of the paint tank 8, and retracting the fourth electric telescopic rod 701 to adjust the height of the first rotating shaft 702, driving the second connecting rod 703 to move the position, thereby driving the second rotating shaft 704 to rotate, driving the connecting ball 606 in the spherical shell 605 to rotate, and moving the first groove 607 to make the injection pipe 604 pass through from top to bottom, and injecting a certain amount of material in the filling tank 501 into the paint tank 8.

[0033] Through the above steps, the base 1 is set to place the paint tank 8, the position of the base 1 is flexibly moved by the moving component 2, and after the base 1 is moved to the specified position, the required material is replenished by the storage component 3 storage device, and the metering component 5 is supported and fixed by the support component 4. The amount of replenished material is adjusted according to actual production needs through the metering component 5, and then, the material is injected into the paint tank 8 by the replenishing component 6. At the same time, the material conveying path of the replenishing component 6 is adjusted by the adjusting component 7.

[0034] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A convenient metering feeding device for coating production, comprising a base (1); characterized in that: The invention also comprises a moving component (2), a material storage component (3), a support component (4), a metering component (5), a material replenishing component (6), an adjusting component (7) and a paint tank (8); the moving component (2) is arranged on the bottom surface of the base (1); the material storage component (3) is arranged on one side of the base (1); the support component (4) is arranged on the other side of the base (1); the metering component (5) is arranged on one side of the support component (4); the material replenishing component (6) is arranged on one side of the metering component (5); a paint tank (8) is arranged below the material replenishing component (6); and the adjusting component (7) is arranged on one side of the material replenishing component (6).

2. A convenient metering feeding device for coating production according to claim 1, characterized in that: The moving assembly (2) comprises a conveyor belt (201), a universal pulley (202) and a first electric telescopic rod (203); a conveyor belt (201) is arranged on one side of the base (1); a universal pulley (202) is arranged on the bottom surface of the base (1); a plurality of sets of universal pulleys (202) are arranged; a first electric telescopic rod (203) is also arranged on the bottom surface of the base (1); a plurality of sets of first electric telescopic rods (203) are arranged.

3. The convenient metering feeding device for coating production according to claim 1 is characterized in that: The material storage assembly (3) comprises a first support rod (301), a first fixing plate (302), a material storage tank (303) and a feeding pipe (304); the first support rod (301) is arranged on one side of the base (1); two groups of the first support rod (301) are arranged; a first fixing plate (302) is arranged at one end of the first support rod (301); a material storage tank (303) is arranged on one side of the first fixing plate (302); and a feeding pipe (304) is arranged on one side of the material storage tank (303).

4. A convenient metering feeding device for coating production according to claim 3, characterized in that: The support assembly (4) comprises a second electric telescopic rod (401), a second fixing plate (402), a second support rod (403), a third support rod (404) and a connecting spring (405); the second electric telescopic rod (401) is arranged on one side of the base (1), the second fixing plate (402) is arranged on one end of the second electric telescopic rod (401), the second support rod (403) is also arranged on one side of the base (1), the third support rod (404) is arranged inside the second support rod (403), the third support rod (404) and the second support rod (403) are slidably connected to each other, and the connecting spring (405) is arranged on one side of the third support rod (404).

5. A convenient metering feeding device for coating production according to claim 4, characterized in that: The metering assembly (5) comprises a feeding tank (501), a scale line (502), a third electric telescopic rod (503), a first connecting rod (504) and a piston (505); the feeding tank (501) is arranged on one side of the second fixed plate (402), the scale line (502) is arranged on the outside of the feeding tank (501), the third electric telescopic rod (503) is also arranged on one side of the second fixed plate (402), the first connecting rod (504) is arranged at one end of the third electric telescopic rod (503), and the piston (505) is arranged at one end of the first connecting rod (504).

6. A convenient metering feeding device for coating production according to claim 5, characterized in that: The feeding assembly (6) comprises a water pump (601), a first feeding pipe (602), a second feeding pipe (603), an injection pipe (604), a spherical shell (605), a connecting ball (606) and a first groove (607); the water pump (601) is arranged on the bottom surface of the first fixed plate (302); the first feeding pipe (602) is arranged on one side of the water pump (601); the second feeding pipe (603) is arranged at one end of the first feeding pipe (602); the injection pipe (604) is arranged on the bottom surface of the second fixed plate (402); the spherical shell (605) is arranged on the inner side of the injection pipe (604); the connecting ball (606) is arranged inside the spherical shell (605); the connecting ball (606) and the spherical shell (605) are rotatably connected to each other; the first groove (607) is opened on one side of the connecting ball (606); and the first groove (607) is opened in a plurality of groups.

7. A convenient metering feeding device for coating production according to claim 6, characterized in that: The adjustment assembly (7) comprises a fourth electric telescopic rod (701), a first rotating shaft (702), a second connecting rod (703) and a second rotating shaft (704); the fourth electric telescopic rod (701) is arranged on the bottom surface of the second fixed plate (402); one end of the fourth electric telescopic rod (701) is arranged with the first rotating shaft (702); one end of the first rotating shaft (702) is arranged with the second connecting rod (703); one end of the second connecting rod (703) is arranged with the second rotating shaft (704); and the other end of the second rotating shaft (704) is connected to the connecting ball (606).