Automatic dispensing device for battery cell

Abstract

The utility model belongs to the technical field of battery cell processing, and particularly relates to an automatic battery cell dispensing device which comprises a base, an arm robot and a control mechanism, a feeding mechanism is installed on the side wall of the base, a recycling mechanism is further installed on the side wall of the base, and a fixing mechanism is connected to the top end of the base and located on the right side of the arm robot. A stirring motor and a stirring rod in the feeding mechanism are matched with each other, so that glue dispensing liquid in a glue storage bottle can be stirred, the glue dispensing liquid can be uniformly mixed, the glue dispensing liquid can be uniformly mixed, and the glue dispensing efficiency is improved. The situation that the dispensing liquid precipitates is reduced, meanwhile, the situation that the dispensing liquid fixes, seals and insulates the battery cell unstably is reduced, the position of the laser device is conveniently adjusted through a threaded sleeve and a two-way lead screw in the positioning mechanism, and therefore the laser device can be adjusted according to different dispensing positions of the battery cell to facilitate positioning.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery cell processing, and particularly relates to an automatic glue dispensing device for battery cells. Background Technique

[0002] A battery cell refers to a single electrochemical cell containing positive and negative electrodes, which is generally not used directly. Different from a battery, a battery contains a protection circuit and a casing and can be used directly. The composition of a lithium-ion secondary rechargeable battery is as follows: battery cell + protection circuit board. A rechargeable battery without the protection circuit board is the battery cell. It is the electricity storage part in a rechargeable battery. The quality of the battery cell directly determines the quality of the rechargeable battery.

[0003] During the processing of battery cells, glue dispensing is required to accurately coat glue on specific positions of the battery cells to achieve purposes such as fixing, sealing, and insulating the battery cells. Therefore, battery cell glue dispensing equipment is used. Currently, there are various types of battery cell glue dispensing equipment on the market, including manual glue dispensers, semi-automatic glue dispensers, and fully automatic glue dispensers. Among them, the fully automatic glue dispenser has the advantages of high automation, high precision, and high efficiency, and has become the mainstream equipment in the field of battery cell glue dispensing. However, there are still certain deficiencies in the use of glue dispensing equipment. For example, during the glue dispensing process, the glue dispenser needs to extract glue liquid for a long time, and it takes a certain amount of time to replace the used glue liquid. Therefore, if the glue liquid is placed for a long time, unnecessary precipitates will be generated. If these precipitates are coated on the battery cells through the glue dispenser, it is easy to cause unstable fixing, sealing, and insulation of the battery cells. In order to reduce the generation of precipitates, we provide an automatic glue dispensing device for battery cells. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an automatic glue dispensing device for battery cells, aiming to solve the problems in the prior art that during the glue dispensing process, the glue dispenser needs to extract glue liquid for a long time, and it takes a certain amount of time to replace the used glue liquid. Therefore, if the glue liquid is placed for a long time, unnecessary precipitates will be generated. If these precipitates are coated on the battery cells through the glue dispenser, it is easy to cause unstable fixing, sealing, and insulation of the battery cells. In order to reduce the generation of precipitates, we provide an automatic glue dispensing device for battery cells.

[0005] To achieve the above object, the present utility model provides the following technical solutions: An automatic glue - dotting device for battery cells, comprising a base, an arm robot, and a control mechanism. The arm robot is installed at the top of the base, and the control mechanism is installed inside the base. A feeding mechanism is installed on the side wall of the base, and a recycling mechanism is also installed on the side wall of the base. A fixing mechanism is connected to the top of the base and on the right side of the arm robot, and a positioning mechanism is connected to the top of the base and on the right side of the arm robot. An operating mechanism is connected to the top of the base and on the left side of the arm robot. Glue - dotting needles and cameras are respectively connected to both sides of the end of the arm robot. The control mechanism includes a PLC controller and an industrial computer. The PLC controller is installed on the side wall inside the base, and the industrial computer is installed at the bottom inside the base. The operating mechanism includes a touch screen and a computer, and the touch screen and the computer are integrally installed in a connection box at the top of the base. The control mechanism, the feeding mechanism, the recycling mechanism, the fixing mechanism, the arm robot, the positioning mechanism, and the operating mechanism are electrically connected.

[0006] As a preferred embodiment of the automatic glue - dotting device for battery cells of the present utility model, the feeding mechanism includes a support plate, a placement bin, a glue storage bottle, a sealing cover, a supply air pipe, a discharge pipe, a pressure gauge, a liquid - stop valve, a stirring motor, and a stirring rod. The support plate is installed on the side wall of the base, the placement bin is connected to the top of the support plate, the glue storage bottle is placed inside the placement bin, the sealing cover is hermetically connected to the top of the placement bin, the stirring motor is installed on the top of the sealing cover, the stirring rod is connected to the output shaft of the stirring motor, the supply air pipe and the discharge pipe are connected to the top of the sealing cover on the left and right sides of the stirring motor, the pressure gauge is connected to the surface of the supply air pipe, and the liquid - stop valve is connected to the surface of the discharge pipe.

[0007] As a preferred embodiment of the automatic glue - dotting device for battery cells of the present utility model, the end of the discharge pipe is connected to the inlet of the glue - dotting needle. The supply air pipe and the discharge pipe extend into the interior of the placement bin, and the stirring rod is rotationally connected to the sealing cover through the stirring motor.

[0008] As a preferred embodiment of the automatic glue - dotting device for battery cells of the present utility model, the recycling mechanism includes a connecting plate, a glue storage box, a glue collection bottle, and a connecting pipe. The glue storage box and the glue collection bottle are connected to the top of the connecting plate, the connecting pipe is connected between the glue storage box and the glue collection bottle, and the connecting plate is connected to the side wall of the base.

[0009] As a preferred embodiment of the automatic glue - dotting device for battery cells of the present utility model, the bottom end of the glue storage box is inclined, and the connecting pipe is connected to the bottom end of the inclined part of the glue storage box.

[0010] Preferably, as an automatic glue - dotting device for an electric core of the present utility model, the positioning mechanism includes a support frame, a laser, a bidirectional lead screw, a bearing, a servo motor, and a threaded sleeve. The support frame is installed at the top end of the base, the laser is arranged at the bottom end of the support frame, the bidirectional lead screw is connected inside the support frame, the bearing is connected to one end of the bidirectional lead screw, the servo motor is installed on the side wall of the support frame, and the threaded sleeve is connected to the surface of the bidirectional lead screw.

[0011] Preferably, as an automatic glue - dotting device for an electric core of the present utility model, the top end of the laser is connected to the bottom end of the threaded sleeve. The laser forms a threaded movement with the bidirectional lead screw through the threaded sleeve, and the bidirectional lead screw forms a rotational connection with the support frame through the bearing.

[0012] Preferably, as an automatic glue - dotting device for an electric core of the present utility model, the fixing mechanism includes a connecting block, an electric rod, and a clamping block. The connecting block is installed at the top end of the base, the electric rod is installed on the outer side wall of the base, the clamping block is connected to the telescopic end of the electric rod, and the clamping block forms a reciprocating telescopic connection with the connecting block through the electric rod.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] The present utility model uses the cooperation of the stirring motor and the stirring rod in the feeding mechanism to stir the glue - dotting liquid in the glue storage bottle, reducing the precipitation of the glue - dotting liquid. At the same time, it also reduces the occurrence of unstable situations in the fixation, sealing, and insulation of the glue - dotting liquid on the electric core. Subsequently, the recycling mechanism can recycle the glue - dotting liquid to avoid waste of the glue - dotting liquid. The threaded sleeve and the bidirectional lead screw in the positioning mechanism are used to conveniently adjust the position of the laser, so that the laser can be adjusted according to the different glue - dotting positions of the electric core for convenient positioning. Finally, the fixing mechanism is used to conveniently fix the electric core on the base, and then the arm robot is used for glue - dotting, avoiding the situation where the movement of the electric core affects the glue - dotting position. Description of the Drawings

[0015] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0016] Figure 1 is the schematic diagram of the main structure of the present utility model;

[0017] Figure 2 is the schematic sectional view of the main structure of the present utility model;

[0018] Figure 3 is the schematic left - view structure of the main body of the present utility model;

[0019] Figure 4 Structural schematic diagram of the feeding mechanism of the present utility model;

[0020] Figure 5 Structural schematic diagram of the recycling mechanism of the present utility model;

[0021] Figure 6 Structural schematic diagram of the positioning mechanism of the present utility model;

[0022] Figure 7 Structural schematic diagram of the fixing mechanism of the present utility model.

[0023] In the figure: 1, base; 2, arm robot; 3, control mechanism; 301, PLC controller; 302, industrial control computer; 4, operating mechanism; 401, touch screen; 402, computer; 5, positioning mechanism; 501, support frame; 502, bidirectional lead screw; 503, bearing; 504, servo motor; 505, threaded sleeve; 506, laser; 6, feeding mechanism; 601, support plate; 602, placement bin; 603, glue storage bottle; 604, sealing cover; 605, air supply pipe; 606, discharge pipe; 607, pressure gauge; 608, liquid stop valve; 609, stirring motor; 610, stirring rod; 7, recycling mechanism; 701, glue storage box; 702, connecting pipe; 703, connecting plate; 704, glue collection bottle; 8, fixing mechanism; 801, connecting block; 802, electric rod; 803, clamping block; 9, dispensing needle; 10, camera. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment 1

[0026] Please refer to Figures 1-7, the present utility model provides the following technical solutions: An automatic glue-dotting device for battery cells, comprising a base 1, an arm robot 2, and a control mechanism 3. The arm robot 2 is installed at the top of the base 1, and the control mechanism 3 is installed inside the base 1. A feeding mechanism 6 is installed on the side wall of the base 1, and a recycling mechanism 7 is also installed on the side wall of the base 1. A fixing mechanism 8 is connected to the top of the base 1 and on the right side of the arm robot 2, a positioning mechanism 5 is connected to the top of the base 1 and on the right side of the arm robot 2, and an operating mechanism 4 is connected to the top of the base 1 and on the left side of the arm robot 2. Glue-dotting needles 9 and cameras 10 are respectively connected to both sides of the end of the arm robot 2. The control mechanism 3 includes a PLC controller 301 and an industrial computer 302. The PLC controller 301 is installed on the side wall inside the base 1, and the model of this PLC controller 301 is: CJ2M. The industrial computer 302 is installed at the bottom inside the base 1, and the model of this industrial computer 302 is: IPC-610L. The operating mechanism 4 includes a touch screen 401 and a computer 402. The touch screen 401 and the computer 402 are integrally installed in a connection box at the top of the base 1. The control mechanism 3, the feeding mechanism 6, the fixing mechanism 8, the arm robot 2, the positioning mechanism 5, and the operating mechanism 4 are electrically connected.

[0027] In the embodiment, the automatic glue-dotting device uses the control mechanism 3 to transmit signals to start the feeding mechanism 6, the fixing mechanism 8, and the positioning mechanism 5 to move. Then, the operating mechanism 4 can be used to start the control mechanism 3 to work and then start the glue-dotting device to operate. Then, the arm robot 2 works to perform glue-dotting treatment on the battery cells fixed on the base 1.

[0028] Embodiment 2

[0029] Please refer to Figures 1-7 , the feeding mechanism 6 includes a support plate 601, a placement bin 602, a glue storage bottle 603, a sealing cover 604, a supply air pipe 605, a discharge pipe 606, a pressure gauge 607, a liquid stop valve 608, a stirring motor 609, and a stirring rod 610. The support plate 601 is installed on the side wall of the base 1, the placement bin 602 is connected to the top of the support plate 601, the glue storage bottle 603 is placed inside the placement bin 602, the sealing cover 604 is sealingly connected to the top of the placement bin 602, the stirring motor 609 is installed on the top of the sealing cover 604, the stirring rod 610 is connected to the output shaft of the stirring motor 609, the supply air pipe 605 and the discharge pipe 606 are located on the left and right sides of the stirring motor 609 and are connected to the top of the sealing cover 604, the pressure gauge 607 is connected to the surface of the supply air pipe 605, and the liquid stop valve 608 is connected to the surface of the discharge pipe 606.

[0030] Preferably in the embodiment: The end of the discharge pipe 606 is connected to the feed of the dispensing needle 9. The air supply pipe 605 and the discharge pipe 606 extend into the interior of the placement bin 602. The stirring rod 610 is rotationally connected between the stirring motor 609 and the sealing cover 604.

[0031] In the embodiment, the use of the feeding mechanism 6 is described. Open the sealing cover 604 and deposit the glue storage bottle 603 into the placement bin 602. Then, close the sealing cover 604 to seal the placement bin 602. Next, connect the air supply pipe 605 to the air pump. After the air pump works, air pressure can be generated. Then, the air pressure will push the dispensing liquid in the glue storage bottle 603 into the discharge pipe 606. Then, open the liquid stop valve 608. Then, the dispensing liquid flows along the discharge pipe 606 into the dispensing needle 9 and is discharged. Then, the liquid stop valve 608 closes the discharge pipe 606 after dispensing to avoid the situation of excessive liquid discharge from the discharge pipe 606. Subsequently, use the operating mechanism 4 to start the stirring motor 609 to work, so that the output shaft of the stirring motor 609 drives the stirring rod 610 to rotate, thereby stirring the dispensing liquid inside the glue storage bottle 603, reducing the precipitation of the dispensing liquid, and at the same time reducing the occurrence of unstable fixing, sealing, and insulation of the dispensing liquid to the battery cell.

[0032] Embodiment Three

[0033] Please refer to Figures 1-7 , the recovery mechanism 7 includes a connecting plate 703, a glue storage box 701, a glue collection bottle 704, and a connecting pipe 702. The glue storage box 701 and the glue collection bottle 704 are connected at the top of the connecting plate 703. The connecting pipe 702 is connected between the glue storage box 701 and the glue collection bottle 704. The connecting plate 703 is connected to the side wall of the base 1.

[0034] Preferably in the embodiment: The bottom end of the glue storage box 701 is inclined, and the connecting pipe 702 is connected at the bottom end of the inclined glue storage box 701.

[0035] In the embodiment, the use of the recovery mechanism 7 is described. After the automatic dispensing device is used, if there is still dispensing liquid remaining in the discharge pipe 606 in the feeding mechanism 6, at this time, use the touch screen 401 in the operating mechanism 4 to reset the arm robot 2. Then, the dispensing needle 9 on the arm robot 2 is above the glue storage box 701. Then, start the feeding mechanism 6 to push the dispensing liquid into the discharge pipe 606 and then discharge it along the dispensing needle 9 to the outside and fall into the glue storage box 701. Then, it flows into the glue collection bottle 704 through the connecting pipe 702 for storage, thereby recovering the dispensing liquid and reducing the waste of the dispensing liquid.

[0036] Embodiment Four

[0037] Please refer to Figures 1-7, the positioning mechanism 5 includes a support frame 501, a laser 506, a bidirectional lead screw 502, a bearing 503, a servo motor 504, and a threaded sleeve 505. The support frame 501 is installed at the top of the base 1, the laser 506 is arranged at the bottom of the support frame 501, and the model of the laser 506 is: nfl-b. The bidirectional lead screw 502 is connected inside the support frame 501, the bearing 503 is connected to one end of the bidirectional lead screw 502, the servo motor 504 is installed on the side wall of the support frame 501, and the threaded sleeve 505 is connected to the surface of the bidirectional lead screw 502.

[0038] Preferably in the embodiment: the top end of the laser 506 is connected to the bottom end of the threaded sleeve 505, the laser 506 forms a threaded movement with the bidirectional lead screw 502 through the threaded sleeve 505, and the bidirectional lead screw 502 forms a rotational connection with the support frame 501 through the bearing 503.

[0039] In the embodiment, a description is made of the use of the positioning mechanism 5. First, the servo motor 504 is started to work by using the operating mechanism 4. Then, the output shaft of the servo motor 504 drives the bidirectional lead screw 502 to rotate inside the support frame 501 along the inner ring of the bearing 503. Next, the threaded sleeve 505 starts to move closer to or away from each other along the thread on the surface of the bidirectional lead screw 502. At the same time, the threaded sleeve 505 drives the laser 506 to move, and thus the position of the laser 506 changes. Therefore, the laser 506 can be adjusted according to the different positions of the core dispensing to facilitate positioning.

[0040] Embodiment Five

[0041] Please refer to Figures 1-7 , the fixing mechanism 8 includes a connecting block 801, an electric rod 802, and a clamping block 803. The connecting block 801 is installed at the top of the base 1, the electric rod 802 is installed on the outer side wall of the base 1, the clamping block 803 is connected to the telescopic end of the electric rod 802, and the clamping block 803 forms a telescopic reciprocating connection with the connecting block 801 through the electric rod 802.

[0042] In the embodiment, a description is made of the use of the fixing mechanism 8. First, the electric rod 802 is started to work by using the operating mechanism 4. Then, the telescopic end of the electric rod 802 extends to drive the clamping block 803 to move, and thus the clamping block 803 moves to fix the core on the base 1. Then, the arm robot 2 is used for dispensing to avoid the occurrence of the situation that the movement of the core affects the dispensing position.

[0043] In summary, according to the descriptions in Embodiments One to Five, the working principle of the automatic dispensing device is to utilize the operating mechanism 4 and the control mechanism 3 to realize the automation of the device:

[0044] First, turn on the device using the touch screen 401 inside the operating mechanism 4. Then, manually operate the touch screen 401 to reset each device. Next, start the application by retrieving data according to the battery cell through the computer 402. Subsequently, the computer 402 transmits the data to the control mechanism 3, and then uses the PLC controller 301 and the industrial computer 302 to control the operation of the robotic arm 2;

[0045] Next, place the battery cell on the top of the base 1. Then, start the operation of the servo motor 504 using the touch screen 401. Further, the operation of the servo motor 504 drives the rotation of the bidirectional lead screw 502. The rotation of the bidirectional lead screw 502 drives the movement of the threaded sleeve 505 and the laser 506. Then, use the laser 506 to find the dispensing position of the battery cell. Subsequently, the laser 506 can feedback the position of the battery cell to the display screen of the computer 402;

[0046] Immediately afterwards, start the operation of the electric rod 802 using the touch screen 401. Further, the telescopic end of the electric rod 802 extends to push the clamping block 803 closer to the battery cell, thereby fixing the battery cell on the base 1;

[0047] Immediately following that, place the glue storage bottle 603 into the placement bin 602 and seal it with the sealing cap 604. Then, the control mechanism 3 transmits a signal to open the liquid stop valve 608. The air supply pipe 605 generates air pressure through the air pump to push the dispensing liquid into the discharge pipe 606, and then it flows along the discharge pipe 606 into the dispensing needle 9. Next, the robotic arm 2 moves closer to the battery cell to start the dispensing operation. Subsequently, use the camera 10 to observe the dispensing situation.

[0048] Finally, after the automatic dispensing device is used, if there is still residual dispensing liquid in the discharge pipe 606 of the feeding mechanism 6, at this time, use the touch screen 401 inside the operating mechanism 4 to reset the robotic arm 2. Then, the dispensing needle 9 on the robotic arm 2 is above the glue storage box 701. Then, start the feeding mechanism 6 to push the dispensing liquid into the discharge pipe 606, and then it is discharged along the dispensing needle 9 to the outside and falls into the glue storage box 701, and then flows into the glue collection bottle 704 through the connecting pipe 702 for storage, thereby recycling the dispensing liquid and reducing the waste of the dispensing liquid.

[0049] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automatic dispensing device for battery cells, comprising a base (1), an arm robot (2) and a control mechanism (3), characterized in that: The arm robot (2) is installed at the top of the base (1), the control mechanism (3) is installed inside the base (1), a feeding mechanism (6) is installed on the side wall of the base (1), a recovery mechanism (7) is also installed on the side wall of the base (1), a fixing mechanism (8) is connected to the top of the base (1) and located on the right side of the arm robot (2), a positioning mechanism (5) is connected to the top of the base (1) and located on the right side of the arm robot (2), an operating mechanism (4) is connected to the top of the base (1) and located on the left side of the arm robot (2), and a dispensing needle (9) and a camera (10) are respectively connected to both sides of the end of the arm robot (2); The control mechanism (3) comprises a PLC controller (301) and an industrial computer (302), wherein the PLC controller (301) is installed on a side wall inside the base (1), and the industrial computer (302) is installed on the bottom end inside the base (1); The operating mechanism (4) comprises a touch screen (401) and a computer (402), wherein the touch screen (401) and the computer (402) are integrated and installed in a connection box at the top of the base (1), and the control mechanism (3), the feeding mechanism (6), the fixing mechanism (8), the arm robot (2), the positioning mechanism (5) and the operating mechanism (4) are electrically connected; The feeding mechanism (6) comprises a support plate (601), a storage bin (602), a glue storage bottle (603), a sealing cover (604), an air supply pipe (605), a discharge pipe (606), a pressure gauge (607), a liquid stop valve (608), a stirring motor (609) and a stirring rod (610), wherein the support plate (601) is mounted on the side wall of the base (1), the storage bin (602) is connected to the top of the support plate (601), the glue storage bottle (603) is placed inside the storage bin (602), and the sealing cover (604) is placed inside the storage bin (602). The sealing cover (604) is sealingly connected to the top of the placement bin (602), the stirring motor (609) is installed on the top of the sealing cover (604), the stirring rod (610) is connected to the output shaft of the stirring motor (609), the air supply pipe (605) and the discharge pipe (606) are located on the left and right sides of the stirring motor (609) and connected to the top of the sealing cover (604), the pressure gauge (607) is connected to the surface of the air supply pipe (605), and the liquid stop valve (608) is connected to the surface of the discharge pipe (606).

2. The automatic dispensing device for battery cells according to claim 1, characterized in that: The end of the discharge pipe (606) is connected to the feed of the dispensing needle (9), the air supply pipe (605) and the discharge pipe (606) extend to the interior of the placement bin (602), and the stirring rod (610) is rotationally connected to the sealing cover (604) through the stirring motor (609).

3. The automatic dispensing device for battery cells according to claim 1, characterized in that: The recycling mechanism (7) comprises a connecting plate (703), a glue storage box (701), a glue collection bottle (704) and a connecting tube (702); the glue storage box (701) and the glue collection bottle (704) are connected at the top end of the connecting plate (703); the connecting tube (702) is connected between the glue storage box (701) and the glue collection bottle (704); and the connecting plate (703) is connected to the side wall of the base (1).

4. The automatic dispensing device for battery cells according to claim 3 is characterized in that: The bottom end of the glue storage box (701) is inclined and the connecting tube (702) is connected to the inclined bottom end of the glue storage box (701).

5. The automatic dispensing device for battery cells according to claim 1, characterized in that: The positioning mechanism (5) comprises a support frame (501), a laser (506), a bidirectional screw rod (502), a bearing (503), a servo motor (504) and a threaded sleeve (505); the support frame (501) is mounted on the top end of the base (1); the laser (506) is arranged at the bottom end of the support frame (501); the bidirectional screw rod (502) is connected to the inside of the support frame (501); the bearing (503) is connected to one end of the bidirectional screw rod (502); the servo motor (504) is mounted on the side wall of the support frame (501); and the threaded sleeve (505) is connected to the surface of the bidirectional screw rod (502).

6. The automatic dispensing device for battery cells according to claim 5, characterized in that: The top end of the laser (506) is connected to the bottom end of the threaded sleeve (505), the laser (506) forms a threaded motion with the bidirectional screw rod (502) through the threaded sleeve (505), and the bidirectional screw rod (502) forms a rotational connection with the support frame (501) through the bearing (503).

7. The automatic dispensing device for battery cells according to claim 1, characterized in that: The fixing mechanism (8) comprises a connecting block (801), an electric rod (802) and a clamping block (803); the connecting block (801) is mounted on the top of the base (1); the electric rod (802) is mounted on the outer side wall of the base (1); the clamping block (803) is connected to the telescopic end of the electric rod (802); and the clamping block (803) forms a telescopic reciprocating connection with the connecting block (801) through the electric rod (802).

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