A lead-acid battery box and its positioning and assembly equipment

Abstract

The present invention discloses a lead-acid battery box and its positioning and assembling equipment. The lead-acid battery box positioning and assembling equipment includes two side transportation components, a bearing component, and a clamping component. The bearing component is located between the two transportation components. One transportation component is used to transport the box bottom, and the other transportation component is used to transport the box cover. The clamping component is used to sequentially transfer the box bottom and the box cover on the transportation components to the bearing component. The detection component includes an extension plate. A pressing cylinder is arranged below the extension plate and is used to control the downward sliding of the lower pressing plate and press the box cover into the box bottom. Detection components are also arranged on both sides of the extension plate, and an adjustment component is arranged above the extension plate. The detection component is used to detect whether the box cover is installed flat or obliquely above the box bottom, thereby improving the assembly accuracy and efficiency and reducing the labor intensity of operators.

Description

Technical Field

[0001] The present invention relates to the production technology of lead-acid batteries, and particularly to a lead-acid battery box and its positioning and assembly equipment. Background Art

[0002] Due to its high cost performance and stability, lead-acid batteries are widely used in various fields. However, the structural design of the lead-acid battery box is unreasonable, and it is very easy for operators to misinstall the battery during loading and unloading. Misinstallation not only wastes resources and time, but also affects the performance and service life of the battery. Therefore, existing lead-acid battery boxes are all provided with anti-misinstallation structures.

[0003] For example, Chinese Patent Application CN103560217A discloses a battery box for a lead-acid battery used in an electric bicycle. In this patent, a limiting boss is provided on the inner wall of the bottom of the box at the end of the lead-acid battery, which can effectively prevent the lead-acid battery from being misinstalled and can also prevent the lead-acid battery from shaking.

[0004] There is also prior art such as Chinese Patent Application CN211957826U. In this patent, by providing grooves with different lengths on the fixed side of the battery, the problem of incorrect placement direction during installation is prevented.

[0005] The above prior art only discloses the specific structure of anti-misinstallation, but still requires manual correction of the direction and cannot achieve large-scale production line production. Therefore, the prior art needs to be further improved. Summary of the Invention

[0006] In order to solve the defects existing in the above prior art, the present invention provides a lead-acid battery box and its positioning and assembly equipment.

[0007] The technical solution of the present invention is realized as follows:

[0008] A lead-acid battery box includes a bottom and a cover which are connected to each other. The bottom includes an outer shell, and a boss is provided at the top of the outer shell. The bottom is connected to the cover through the boss.

[0009] It is characterized in that a first limiting structure is provided at one end of the boss, and second limiting structures and mating grooves are respectively provided at both ends of the cover. When the first limiting structure is aligned with the second limiting structure, the cover is flatly installed above the bottom; when the first limiting structure is aligned with the mating groove, the cover is obliquely installed above the bottom.

[0010] A lead-acid battery box positioning and assembly equipment is characterized in that the positioning and assembly equipment includes two side transportation components, a bearing component and a clamping component.

[0011] The bearing member is located between two transport members, one transport member for transporting the bottom of the box and the other transport member for transporting the lid of the box. The clamping member is used to sequentially transfer the bottom of the box and the lid of the box on the transport members to the bearing member. Among them,

[0012] The positioning and assembling device further includes a lifting member and a detecting member. The lifting member includes a ball screw structure for driving the detecting member to move up and down. The detecting member includes an extension plate. A pressing cylinder is arranged below the extension plate for controlling the downward sliding of the pressing plate and pressing the lid of the box into the bottom of the box. Detection components are also arranged on both sides of the extension plate, and an adjusting component is arranged above the extension plate. The detection component is used to detect whether the lid of the box is installed flat or obliquely above the bottom of the box. If the lid of the box is installed obliquely above the bottom of the box, the adjusting component drives the lid of the box to rotate 180°.

[0013] In the present invention, the detection component includes an extension block, which is fixedly connected to one side of the extension plate. An induction cylinder is installed inside the extension block, and a roller is arranged on the output shaft of the induction cylinder.

[0014] While the pressing cylinder drives the pressing plate to slide downward, the induction cylinder extends together with the pressing cylinder, so that the roller fits above the lid of the box.

[0015] When the extension length of the output shaft of one of the induction cylinders is greater than the extension length of the output shaft of the other induction cylinder, the lid of the box is installed obliquely above the bottom of the box.

[0016] In the present invention, the adjusting component includes an adjusting cylinder, which is fixedly installed above the extension plate. The output shaft of the adjusting cylinder penetrates through the pressing plate and is connected with an extension rod. A large suction cup is connected to the bottom of the extension rod. Among them, a yaw motor is arranged on one side of the adjusting cylinder. The yaw motor is connected with the extension rod through a second transmission member, and the extension rod is of a spline shaft structure.

[0017] In the present invention, the transport member includes a first leg frame, and a control unit is arranged on the first leg frame for controlling the start, stop and transport rate of the conveyor belt.

[0018] The conveyor belt is installed above the first leg frame. The bottom of the box or the lid of the box is located directly above the conveyor belt. Side retaining strips are also arranged on both sides of the conveyor belt for restricting both sides of the bottom of the box or the lid of the box. Among them, a restricting strip is arranged at one end of the conveyor belt close to the bearing member for restricting the movement of the bottom of the box or the lid of the box along the direction close to the bearing member.

[0019] In the present invention, an inclined retaining strip is further arranged on the side retaining strip, and the inclined retaining strip is obliquely installed inside the side retaining strip at an angle of 30-45°.

[0020] In the present invention, the bearing component includes a second leg frame, and sliding frames are arranged around the second leg frame. A bearing plate is slidably connected to the second leg frame via a plurality of sliding frames.

[0021] A lifting cylinder is arranged below the supporting plate, through which the vertical distance between the supporting plate and the bottom surface is adjusted, wherein the first clamp, the second clamp and the third clamp are detachably installed above the supporting plate and are used to cooperate with the bottom of the supporting clamping box.

[0022] In the present invention, the clamping component includes a base, a rotating member is rotatably connected above the base, and the first adjusting motor is installed on one side of the rotating member.

[0023] A large swing arm is provided at the upper end of the rotating member, and a second adjusting motor is installed on one side of the large swing arm. The second adjusting motor is used to control the large swing arm to rotate along the rotating member. A connecting member is also provided at one end of the large swing arm away from the rotating member, and the connecting member is connected to the small swing arm. A rotating member is also provided at one end of the small swing arm away from the connecting member.

[0024] In the present invention, the rotating member is further provided with a suction cup assembly, the suction cup assembly includes a transverse connecting rod, the transverse connecting rod is fixedly connected to the rotating member, a longitudinal connecting rod is installed on both sides of the transverse connecting rod, and the distance between the two longitudinal connecting rods is adjustable, and a plurality of small suction cups are provided on the longitudinal connecting rod.

[0025] The lead-acid battery box and the positioning and assembly equipment thereof according to the present invention have the following beneficial effects:

[0026] The lead-acid battery box positioning and assembly equipment of the present invention realizes the functions of stable transportation, precise positioning, efficient assembly and positive and negative pole detection of the box bottom and box cover through the coordinated work of multiple components, thereby improving the accuracy and efficiency of assembly and reducing the labor intensity of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of the lead-acid battery box of the present invention;

[0028] Figure 2 It is a partial structural schematic diagram of the lead-acid battery box of the present invention;

[0029] Figure 3 It is a partial structural schematic diagram of the lead-acid battery box of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the positioning and assembly equipment of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the transport component of the present invention;

[0032] Figure 6Structural schematic diagram of the bearing component of the present invention;

[0033] Figure 7 Structural schematic diagram of the clamping component of the present invention;

[0034] Figure 8 Structural schematic diagram of the lifting component of the present invention;

[0035] Figure 9 Structural schematic diagram of the detection component of the present invention;

[0036] Figure 10 Another perspective structural schematic diagram of the detection component of the present invention;

[0037] The reference numerals are shown as: 100 - lead - acid battery box, 11 - box bottom, 111 - outer shell, 112 - boss, 113 - battery slot, 114 - partition, 115 - through - slot, 116 - first limiting structure, 12 - box cover, 121 - positive terminal connection, 122 - negative terminal connection, 123 - top platform, 124 - concave platform, 125 - second limiting structure, 126 - mating groove, 127 - first positioning block, 128 - second positioning block, 129 - side rib, 200 - positioning and assembling device, 21 - transportation component, 211 - first leg frame, 212 - control unit, 213 - conveyor belt, 214 - side stop bar, 215 - inclined stop bar, 216 - limiting bar, 22 - bearing component, 221 - second leg frame, 222 - sliding frame, 223 - lifting cylinder, 224 - bearing plate, 225 - first clamping fixture, 226 - second clamping fixture, 227 - third clamping fixture, 23 - clamping component, 231 - base, 232 - rotating part, 233 - first adjusting motor, 234 - large swing arm, 235 - second adjusting motor, 236 - connecting part, 237 - small swing arm, 238 - rotating part, 239 - suction cup assembly, 239A - horizontal connecting rod, 239B - vertical connecting rod, 239C - small suction cup, 24 - lifting component, 241 - third leg frame, 242 - connecting frame, 243 - slide rail frame, 244 - extension part, 245 - driving motor, 246 - first transmission part, 247 - ball screw, 25 - detection component, 251 - extension plate, 252 - yaw motor, 253 - adjusting cylinder, 254 - second transmission part, 255 - extension rod, 256 - large suction cup, 257 - sliding rod, 258 - lower pressing plate, 259 - lower pressing cylinder, 2510 - concave - shaped block, 2511 - extension block, 2512 - induction cylinder, 2513 - roller. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Embodiment 1

[0039] AsFigures 1 to 3 As shown in the figure, this embodiment discloses a lead-acid battery box. The lead-acid battery box 100 includes a box bottom 11 and a box cover 12 that are connected to each other. Among them, the box bottom 11 includes an outer shell 111. A boss 112 is provided at the top of the outer shell 111. The box bottom 11 is connected to the box cover 12 through the boss 112.

[0040] Inside the outer shell 111, there are a plurality of partitions 114. The inner part of the outer shell 111 is divided into a plurality of battery slots 113 by the partitions 114. The battery slots 113 are used to accommodate lead-acid battery plates. Through grooves 115 are provided on the partitions 114. The through grooves 115 accommodate connection wires for connecting two lead-acid battery plates in series.

[0041] Above the box cover 12, a positive terminal 121 and a negative terminal 122 are provided. The positive terminal 121 and the negative terminal 122 are connected to a plurality of mutually connected lead-acid battery plates in series. On the inner side wall of the box cover 12, a top platform 123 is provided. The top platform 123 is used to prevent the lead-acid battery plates from being restricted within the battery slots 113. An indentation 124 is also provided on the inner side of the box cover 12. The boss 112 is located inside the indentation 124, enabling the box bottom 11 and the box cover 12 to be cooperatively connected. First positioning blocks 127 and second positioning blocks 128 are also provided on the box cover 12. The first positioning blocks 127 and the second positioning blocks 128 are opposite to the through grooves 115 and are used to restrict the connection wires within the through grooves 115. At the same time, serpentine side ribs 129 are also provided inside the box cover 12 for guiding the distribution of the connection wires.

[0042] Furthermore, during the assembly of the lead-acid battery box, it is very easy to have misassembly. After misassembly, not only will resources and time be wasted, but also the performance and service life of the battery will be affected. As Figure 1 and Figure 2 shown, one end of the boss 112 is provided with a first limiting structure 116. The two ends of the box cover 12 are respectively provided with a second limiting structure 125 and a mating groove 126. When the first limiting structure 116 is aligned with the second limiting structure 125, the box cover 12 and the box bottom 11 can be stably connected; when the first limiting structure 116 is aligned with the mating groove 126, the box cover 12 cannot be installed above the box bottom 11. Embodiment Two

[0043] Based on the above embodiment, this embodiment further discloses a positioning and assembly device for a lead-acid battery box. As Figures 4 to 10 shown, the positioning and assembly device 200 includes two side transportation components 21, a bearing component 22, and a clamping component 23.

[0044] As Figure 4 shown, the bearing component 22 is located between the two transportation components 21. One of the transportation components 21 is used to transport the box bottom 11, and the other transportation component 21 is used to transport the box cover 12.

[0045] As shown Figure 5 in FIG. 1, the transport component 21 includes a first leg frame 211, on which a control unit 212 is provided for controlling the start / stop and transport rate of the conveyor belt 213. The conveyor belt 213 is installed above the first leg frame 211, and the bottom 11 or the lid 12 of the box is located directly above the conveyor belt 213 and moves along the conveyor belt 213. Side strips 214 are also provided on both sides of the conveyor belt 213 for restricting both sides of the bottom 11 or the lid 12 of the box to prevent deviation during transportation. Among them, a limiting strip 216 is provided at one end of the conveyor belt 213 close to the bearing component 22 for restricting the bottom 11 or the lid 12 of the box from continuing to move in the direction close to the bearing component 22.

[0046] Preferably, an inclined strip 215 is further provided on the side strip 214, and the inclined strip 215 is obliquely installed at an angle of 30-45° inside the side strip 214. When the bottom 11 or the lid 12 of the box is placed above the conveyor belt 213, it slides downward for correction under the action of the inclined strip 215.

[0047] As shown Figure 6 in FIG. 2, the bearing component 22 includes a second leg frame 221, sliding frames 222 are provided around the second leg frame 221, and a bearing plate 224 is slidably connected to the second leg frame 221 through a plurality of sliding frames 222. A lifting cylinder 223 is provided below the bearing plate 224 for adjusting the vertical distance of the bearing plate 224 from the bottom surface. Among them, the first clamping fixture 225, the second clamping fixture 226 and the third clamping fixture 227 are detachably installed above the bearing plate 224 and are used to cooperate with the bearing to clamp the bottom 11 of the box. The first clamping fixture 225, the second clamping fixture 226 and the third clamping fixture 227 can also be adjusted according to the size of the bottom 11 of the box.

[0048] In this embodiment, the transport components 21 on both sides transport the bottom 11 and the lid 12 of the box respectively, and then the bottom 11 of the box is loaded above the bearing plate 224 by the clamping component 23 and clamped by the first clamping fixture 225, the second clamping fixture 226 and the third clamping fixture 227. Subsequently, the lid 12 of the box is placed above the bottom 11 of the box by the clamping component 23 and aligned with the bottom 11 of the box. As shown Figure 7As shown in the figure, the clamping component 23 includes a base 231. A rotating member 232 is rotatably connected above the base 231. A first adjustment motor 233 is installed on one side of the rotating member 232 and is used to control the circumferential rotation of the rotating member 232 on the base 231. A large swing arm 234 is provided at the upper end of the rotating member 232. A second adjustment motor 235 is installed on one side of the large swing arm 234, and the second adjustment motor 235 is used to control the rotation of the large swing arm 234 along the rotating member 232. A connecting member 236 is further provided at one end of the large swing arm 234 away from the rotating member 232. The connecting member 236 is connected to a small swing arm 237, and a rotating member 238 is further provided at one end of the small swing arm 237 away from the connecting member 236.

[0049] In this embodiment, a suction cup assembly 239 is further provided on the rotating member 238. The two transportation components 21 on both sides respectively transport the box bottom 11 and the box cover 12 towards the direction close to the bearing component 22 until the box bottom 11 and the box cover 12 are respectively attached to the limiting strips 216. Then, the PLC program is used to control the movement of each component on the clamping component 23 to transport the box bottom 11 and the box cover 12 successively.

[0050] Furthermore, the suction cup assembly 239 includes a transverse connecting rod 239A, and the transverse connecting rod 239A is fixedly connected to the rotating member 238. Longitudinal connecting rods 239B are installed on both sides of the transverse connecting rod 239A, and the distance between the two longitudinal connecting rods 239B is adjustable. A plurality of small suction cups 239C are provided on the longitudinal connecting rods 239B, and the number of small suction cups 239C can be increased or decreased according to the actual use situation.

[0051] Generally, when the staff places the box bottom 11 and the box cover 12 on the conveyor belt 213, they do not distinguish the orientations of the box bottom 11 and the box cover 12. During assembly, it is very easy to misinstall the positive and negative poles. Therefore, this embodiment further discloses a lifting component 24 and a detection component 25.

[0052] As Figure 8 shown in the figure, the lifting component 24 includes a third leg frame 241. A connecting frame 242 is fixedly connected above the third leg frame 241. Slide rail frames 243 are provided on both sides of the connecting frame 242, and an extension member 244 is slidably connected to the slide rail frames 243. A driving motor 245 is provided on the back of the connecting frame 242. The output shaft of the driving motor 245 is connected to a ball screw 247 through a first transmission member 246. The ball screw 247 cooperates with the extension member 244 to control the up and down movement of the extension member 244 along the slide rail frames 243. Among them, a detection component 25 is fixedly connected below the extension member 244.

[0053] As Figures 9 to 10As shown, the detection component 25 includes an extension plate 251, and the extension plate 251 is fixedly connected below the extension member 244. A lower pressing plate 258 is slidably arranged below the extension plate 251 through a sliding rod 257, and a lower pressing cylinder 259 is arranged between the extension plate 251 and the lower pressing plate 258. A concave block 2510 is arranged on the output shaft of the lower pressing cylinder 259, and the concave block 2510 is fixedly connected to the inner side of the lower pressing plate 258. The lower pressing cylinder 259 can control the lower pressing plate 258 to slide up or down along the sliding rod 257. Among them, a plurality of lower pressing blocks are further arranged at the bottom of the lower pressing plate 258.

[0054] In this embodiment, after the clamping component 23 transfers both the box bottom 11 and the box cover 12 above the bearing component 22, the driving motor 245 drives the ball screw 247 to rotate through the first transmission member 246, and drives the extension member 244 and the detection component 25 to move downward, so that the detection component 25 is located directly above the box cover 12. Subsequently, the lower pressing cylinder 259 drives the lower pressing plate 258 to slide downward, and a plurality of lower pressing blocks at the bottom of the lower pressing plate 258 press the box cover 12 into the box bottom 11.

[0055] Furthermore, since the orientations of the box bottom 11 and the box cover 12 are not distinguished during transportation, detection components are arranged on both sides of the extension plate 251. After confirming the orientation of the box cover 12, correction adjustment is still required, and an adjustment component is arranged above the extension plate 251. The detection component is used to detect whether the box cover 12 is installed flat or inclined above the box bottom 11. If the box cover 12 is installed inclined above the box bottom 11, the adjustment component drives the box cover 12 to rotate 180°.

[0056] The detection component includes an extension block 2511, and the extension block 2511 is fixedly connected to one side of the extension plate 251. An induction cylinder 2512 is installed inside the extension block 2511, and a roller 2513 is arranged on the output shaft of the induction cylinder 2512. When the lower pressing cylinder 259 drives the lower pressing plate 258 to slide downward and presses the box cover 12 into the box bottom 11, the induction cylinder 2512 extends together with the lower pressing cylinder 259, so that the roller 2513 fits above the box cover 12. When the extension length of the output shaft of one of the induction cylinders 2512 is greater than the extension length of the output shaft of the other induction cylinder 2512, it indicates that the box cover 12 is installed inclined above the box bottom 11, and the adjustment component needs to drive the box cover 12 to rotate 180°.

[0057] Furthermore, the adjustment component includes an adjustment cylinder 253, and the adjustment cylinder 253 is fixedly installed above the extension plate 251. The output shaft of the adjustment cylinder 253 penetrates through the lower pressing plate 258 and is connected with an extension rod 255, and a large suction cup 256 is connected to the bottom of the extension rod 255. Among them, a yaw motor 252 is arranged on one side of the adjustment cylinder 253, the yaw motor 252 is connected with the extension rod 255 through a second transmission member 254, and the extension rod 255 is of a spline shaft structure.

[0058] In this embodiment, when it is necessary to rotate the box cover 12 by 180°, the output shaft of the adjusting cylinder 253 is extended so that the large suction cup 256 fits against the top of the box cover 12. At this time, the yaw motor 252 drives the large suction cup 256 and the box cover 12 to rotate by 180°. Finally, the box cover 12 is pressed into the box bottom 11 again by a plurality of pressing blocks at the bottom of the lower pressing plate 258, realizing the positioning and assembly of the lead-acid battery box.

[0059] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A positioning and assembly device for a lead-acid battery box, the lead-acid battery box comprising a box bottom and a box cover connected to each other, the box bottom comprising an outer shell, a boss is arranged on the top of the outer shell, the box bottom is connected to the box cover via the boss, a first limiting structure is arranged at one end of the boss, and a second limiting structure and a matching groove are arranged at both ends of the box cover, when the first limiting structure is aligned with the second limiting structure, the box cover is installed flatly above the box bottom; when the first limiting structure is aligned with the matching groove, the box cover is installed obliquely above the box bottom, characterized in that: The positioning and assembly equipment includes two-side transport components, a bearing component and a clamping component. The bearing component is located between two transport components, one of which is used to transport the box bottom, and the other is used to transport the box cover. The clamping component is used to transfer the box bottom and the box cover on the transport component to the bearing component in sequence. The positioning and assembling equipment also includes a lifting component and a detection component. The lifting component includes a ball screw structure for driving the detection component to move up and down. The detection component includes an extension plate. A downward pressure cylinder is arranged below the extension plate to control the downward sliding of the downward pressure plate and press the box cover into the box bottom. Detection components are also arranged on both sides of the extension plate. An adjustment component is arranged above the extension plate. The detection component is used to detect whether the box cover is installed flat or tilted above the box bottom. If the box cover is installed tilted above the box bottom, the box cover is driven to rotate 180° through the adjustment component. The transport component comprises a first leg frame, on which a control unit is arranged, and the control unit is used to control the start and stop of the conveyor belt and the transport speed. The conveyor belt is installed above the first support leg, and the box bottom or box cover is located directly above the conveyor belt. Side bars are also provided on both sides of the conveyor belt, and the side bars are used to limit the two sides of the box bottom or box cover. Among them, a limiting bar is provided at one end of the conveyor belt close to the load-bearing component, and the limiting bar is used to limit the movement of the box bottom or box cover in the direction close to the load-bearing component.

2. The positioning and assembly equipment according to claim 1, characterized in that: The detection assembly includes an extension block, which is fixedly connected to one side of the extension plate. An induction cylinder is installed inside the extension block, and a roller is arranged on the output shaft of the induction cylinder. When the downward pressure cylinder drives the downward pressure plate to slide downward, the induction cylinder extends together with the downward pressure cylinder, so that the roller fits above the box cover. When the extended length of the output shaft of one of the induction cylinders is greater than the extended length of the output shaft of the other induction cylinder, the box cover is installed obliquely above the box bottom.

3. The positioning and assembly equipment according to claim 2, characterized in that: The adjusting assembly includes an adjusting cylinder, which is fixedly installed above the extension plate. The output shaft of the adjusting cylinder passes through the lower pressure plate and is connected to an extension rod. A large suction cup is connected to the bottom of the extension rod. A yaw motor is provided on one side of the adjusting cylinder. The yaw motor is connected to the extension rod via a second transmission member. The extension rod is a spline shaft structure.

4. The positioning and assembly equipment according to claim 1, characterized in that: The side guard bar is also provided with an oblique guard bar, and the oblique guard bar is installed on the inner side of the side guard bar at an angle of 30-45 degrees.

5. The positioning and assembly equipment according to claim 1, characterized in that: The bearing component includes a second leg frame, and sliding frames are arranged around the second leg frame. A bearing plate is slidably connected to the second leg frame via a plurality of sliding frames. A lifting cylinder is arranged below the supporting plate, through which the vertical distance between the supporting plate and the bottom surface is adjusted, wherein the first clamp, the second clamp and the third clamp are detachably installed above the supporting plate and are used to cooperate with the bottom of the supporting clamping box.

6. The positioning and assembly equipment according to claim 1, characterized in that: The clamping component includes a base, a rotating member is rotatably connected to the base, and a first adjusting motor is installed on one side of the rotating member. A large swing arm is provided at the upper end of the rotating member, and a second adjusting motor is installed on one side of the large swing arm. The second adjusting motor is used to control the large swing arm to rotate along the rotating member. A connecting member is also provided at one end of the large swing arm away from the rotating member, and the connecting member is connected to the small swing arm. A rotating member is also provided at one end of the small swing arm away from the connecting member.

7. The positioning and assembly equipment according to claim 6, characterized in that: The rotating member is also provided with a suction cup assembly, which includes a transverse connecting rod, which is fixedly connected to the rotating member, and a longitudinal connecting rod is installed on both sides of the transverse connecting rod, and the distance between the two longitudinal connecting rods is adjustable, and a plurality of small suction cups are provided on the longitudinal connecting rod.

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