CN218946778U - Welding jig - Google Patents

Abstract

The utility model provides a welding jig, which includes a base platform capable of placing electric cores, and a positioning device arranged on the base platform; the positioning device includes a first clamping mechanism capable of clamping electric cores along a first direction, and can The second clamping mechanism for clamping the electric core in the second direction, and the linkage mechanism connected between the first clamping mechanism and the second clamping mechanism, the linkage mechanism is used to drive the first clamping mechanism and the second clamping mechanism The holding mechanism clamps or releases the cell synchronously. The welding fixture described in the utility model can clamp the electric core in two different directions through the cooperation of the first clamping mechanism and the second clamping mechanism, which is beneficial to realize the positioning and fixing of the electric core, and at the same time , the setting of the linkage mechanism can also realize the synchronous operation of the first clamping mechanism and the second clamping mechanism, improve the convenience of operation, and effectively improve the practicality.

Description

Welding fixture

technical field

The utility model relates to the technical field of ultrasonic welding, in particular to a welding jig.

Background technique

At present, in the process of manufacturing electric cores, ultrasonic welding is generally used to weld the tabs. Welding fixtures are needed in the welding process. However, the existing welding fixtures have complex structures, unchanged operations, and electrical problems. The problem of difficult core positioning affects the efficiency of welding operations.

Utility model content

In view of this, the utility model aims to provide a welding jig to realize convenient positioning and fixing of the electric core.

In order to achieve the above object, the technical solution of the utility model is achieved in that:

A welding jig, comprising a base on which an electric core can be placed, and a positioning device provided on the base; the positioning device includes a first clamping mechanism capable of clamping the electric core along a first direction, a second clamping mechanism capable of clamping the electric core in a second direction, and a linkage mechanism connected between the first clamping mechanism and the second clamping mechanism, the linkage mechanism is used to drive The first clamping mechanism and the second clamping mechanism clamp or release the cell synchronously.

Further, the base platform is provided with a station for placing the electric core; the first clamping mechanism includes a push part and a The stopper, the second clamping mechanism includes jaw assemblies arranged on both sides of the station along the second direction; the linkage mechanism is connected between the resisting portion and the two Between the jaw assemblies, driven by the linkage mechanism, the resisting portion can be moved closer to or farther away from the stop portion, and at the same time, the two jaw assemblies can be moved closer to or farther away from each other.

Further, the linkage mechanism includes a first connecting piece provided on the bottom of the abutment slidingly along the first direction, and a second connecting piece arranged on the first connecting piece, and the first connecting piece connected with the resisting part, the second connecting piece is connected with each jaw assembly through a sliding assembly; when the first connecting piece slides toward or away from the stopper along the first direction, The second connecting member can respectively drive the two clamping jaw assemblies towards or away from each other through the two sliding assemblies.

Further, the sliding assembly includes a sliding piece provided on the jaw assembly, and a sliding groove provided on the second connecting piece, the sliding piece slides in the sliding groove; the sliding groove It is in the shape of a long hole, and along the first direction, the sliding groove is gradually inclined toward a direction in which the two jaw assemblies approach each other.

Further, an elastic part is provided between the linkage mechanism and the base; when the first clamping mechanism and the second clamping mechanism release the battery core, the linkage mechanism can compress the The elastic part, and when the elastic part is released, the linkage mechanism can drive the first clamping mechanism and the second clamping mechanism to clamp the battery cell.

Further, the elastic part includes a first elastic member arranged between the resisting part and the base, and a second elastic member arranged between the two jaw assemblies, the first elastic member The elastic member is connected to the linkage mechanism through the resisting portion, and the second elastic member is connected to the linkage mechanism through the two jaw assemblies.

Further, along the height direction of the base, the base is adjustable up and down.

Further, a bottom plate with a support column is provided under the base platform, the base platform is slidably arranged on the support column, and a third elastic member is provided between the base platform and the bottom plate.

Further, the abutment is provided with a slide rail extending along the height direction of the abutment, and the bottom plate slides on the slide rail through a sliding seat; and/or, the top of the abutment is provided with a The pressure-bearing column that undertakes the pressing operation of the external pressing mechanism.

Further, the base plate is provided with a positioning groove for positioning the placement position of the base; and/or, the base plate is provided with a detection unit for detecting the distance between the base and the base.

Compared with the prior art, the utility model has the following advantages:

The welding fixture described in the utility model can clamp the electric core in two different directions through the cooperation of the first clamping mechanism and the second clamping mechanism, which is beneficial to realize the positioning and fixing of the electric core, and The setting of the linkage mechanism can also realize the synchronous operation of the first clamping mechanism and the second clamping mechanism, improve the convenience of operation, and have a good use effect.

In addition, the cooperating arrangement of the resisting portion, the blocking portion, and the two clamping jaw assemblies makes the structural arrangement reasonable, and facilitates the synchronous action of the first clamping mechanism and the second clamping mechanism controlled by the linkage mechanism. The cooperative use of the first connecting piece, the second connecting piece and the sliding assembly facilitates the synchronous clamping and releasing of the electric core by the first clamping mechanism and the second clamping mechanism by operating the first connecting piece, while the sliding groove Cooperating with the sliding parts can improve the sliding stability and reliability.

In addition, the arrangement of the elastic part can make the first clamping mechanism and the second clamping mechanism automatically clamp the battery core without external force manipulation of the linkage mechanism, wherein the cooperative arrangement of the first elastic part and the second elastic part , the structure is simple, and it is easy to arrange and implement. The abutment can be adjusted up and down, and the height of the abutment can be lowered when the welding fixture is sent to the welding position, so as to avoid collision with the welding device. The cooperative arrangement of the bottom plate, the support column and the third elastic member is beneficial to realize the elastic adjustment of the upper and lower positions of the abutment.

At the same time, the combined use of the slide rail and the sliding seat can improve the stability and reliability of the elastic adjustment process of the upper and lower positions of the abutment. Move down to safe working height. The setting of the positioning groove is beneficial to realize the positioning and placement of the welding jig, and the setting of the detection unit is beneficial to detecting whether the abutment moves down to a safe working height.

Description of drawings

The accompanying drawings constituting a part of the utility model are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model, and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 is a schematic diagram of the overall structure of the welding fixture described in the embodiment of the present invention;

Fig. 2 is a partial structural schematic diagram of the welding jig described in the embodiment of the present invention;

Fig. 3 is a structural schematic view of the structure shown in Fig. 2 under other viewing angles;

Fig. 4 is a schematic structural diagram of the thrust part described in the embodiment of the present invention;

Fig. 5 is a schematic structural diagram of the stopper described in the embodiment of the present invention;

Fig. 6 is a schematic structural view of the jaw assembly described in the embodiment of the present invention;

Fig. 7 is a structural schematic diagram of the linkage mechanism described in the embodiment of the present invention;

Fig. 8 is a structural schematic diagram of the welding fixture described in the embodiment of the present invention when it is working;

Explanation of reference signs:

1. Abutment; 2. Resisting part; 3. Stopping part; 4. Gripper assembly; 5. Electric core; 6. First connector; 7. Second connector; 8. First elastic part; 9 , the second elastic member; 10, the bottom plate; 11, the third elastic member; 12, the slide rail; 13, the sliding seat; 14, the pressure column; 15, the base; 16, the detection unit; 17, the fixed block; A sliding rail; 19, the first slider; 20, an ultrasonic welding machine;

101, station; 102, the first installation board;

201, pushing block; 202, connecting plate;

301. Tab avoidance groove;

401, clamping block; 402, connection block; 403, installation block; 4031, sliding part;

701, sliding groove; 801, guide rod; 1001, second mounting plate; 1501, positioning groove; 1601, mounting seat.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

In the description of the present utility model, it should be noted that if there are terms such as "up", "down", "inside" and "outside" that indicate orientation or positional relationship, it is based on the orientation or position shown in the drawings. The relationship is only for the convenience of describing the utility model and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the utility model. In addition, if terms such as "first" and "second" appear, they are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary; connected. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in combination with specific situations.

The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

This embodiment relates to a welding jig, which can realize convenient clamping of the battery cell 5 in two different directions, facilitates the positioning and fixing of the battery cell 5 , and has a good use effect.

In terms of overall structure, as shown in FIGS. 1 to 8 , the welding jig of this embodiment includes a base 1 capable of placing the battery core 5 , and a positioning device provided on the base 1 .

Wherein, the positioning device includes a first clamping mechanism capable of clamping the electric core 5 along a first direction, a second clamping mechanism capable of clamping the electric core 5 in a second direction, and a second clamping mechanism connected between the first clamping mechanism and the second clamping mechanism. The linkage mechanism between the two clamping mechanisms is used to drive the first clamping mechanism and the second clamping mechanism to clamp or release the battery cell 5 synchronously.

Based on the above-mentioned overall structure, in this embodiment, as a preferred implementation manner, as shown in FIG. 1 and FIG. 2 , the base 1 is provided with a station 101 for placing the electric core 5 . The first clamping mechanism includes a push part 2 and a stopper 3 arranged on both sides of the station 101 along the first direction, and the second clamping mechanism includes two opposing parts arranged on the station 101 along the second direction. Side jaw assembly 4.

Moreover, the linkage mechanism is connected between the thrust portion 2 and the two clamping jaw assemblies 4. When in use, under the drive of the linkage mechanism, the thrust portion 2 can be moved closer to or farther away from the stopper portion 3, and the two jaw assemblies can be moved together. The jaw assemblies 4 move toward or move away from each other. Therefore, based on the cooperative arrangement of the thrust part 2 and the stop part 3, and the two clamping jaw assemblies 4, the structural setting is reasonable, and it is convenient to control the synchronous action of the first clamping mechanism and the second clamping mechanism through the linkage mechanism .

It is worth mentioning that the welding jig of this embodiment is generally provided with two stations 101 arranged at intervals to realize ultrasonic welding between the tabs of the two electric cores 5. For the specific structure, refer to FIG. 5 , the stop part 3 can be specifically set as a stop block located between the two stations 101, and a tab avoidance groove 301 for the tab to protrude is provided on the stop block, and the resisting part 2 is set to be located at There are two on both sides of the base 1 in the first direction, and similarly, there are also two second clamping mechanisms to correspond to the two stations 101 respectively.

At the same time, in this embodiment, each station 101 is provided with spacers, and the four corners of the spacers are provided with openings, so as to facilitate the taking and placing of the battery cells 5 . The first direction in this embodiment generally refers to the left-right direction shown in Figure 1, that is, the length direction of the base 1 (the direction in which the two stations 101 are arranged), and the second direction refers to the width of the base 1 direction.

Moreover, in terms of the overall layout, the station 101, the stopper 3, the push end of the push portion 2 and the clamping end of the jaw assembly 4 are all preferably set on the top or above the base 1, and the linkage mechanism is preferably set on the base 1. bottom of stage 1 to avoid interference. In the specific structure, as shown in FIG. 4 and FIG. 7 , the resisting part 2 includes a connecting plate 202 connected to the linkage mechanism, and a resisting block 201 with the above-mentioned resisting end arranged on the connecting plate 202, and on the base 1 Both ends of the first direction are provided with grooves with openings, and the connecting plate 202 is located in the grooves.

The jaw assembly 4 includes a mounting block 403 connected with the linkage mechanism, a connecting block 402 disposed on the mounting block 403 , and a clamping block 401 disposed on the connecting block 402 with the above-mentioned clamping end. Wherein, the connecting block 402 is located on one side of the base 1 , and the clamping block 401 is extended toward the inside of the base 1 .

In addition, in order to improve the stability of the movement of the clamping assembly, a first sliding rail 18 extending along the second direction is provided at the bottom of the base 1, and the mounting block 403 slides on the first sliding rail 18 through the first sliding block 19, So that the jaw assembly 4 can slide along the first slide rail 18 .

For the specific setting, as shown in Fig. 3 and Fig. 7, the preferred implementation form, the linkage mechanism of this embodiment includes the first connecting part 6 which is slid on the bottom of the base 1 along the first direction, and the first connecting part which is arranged on the first connecting part. 6, the first connecting piece 6 is connected to the thrust part 2, and the second connecting piece 7 is connected to each jaw assembly 4 through a sliding assembly. When the first connecting member 6 slides toward or away from the stop portion 3 along the first direction, the second connecting member 7 can respectively drive the two jaw assemblies 4 to approach or move away from each other through the two sliding assemblies.

Such an arrangement facilitates synchronous clamping and releasing of the electric core 5 by the first clamping mechanism and the second clamping mechanism by operating the first connecting member 6 . Here, the first connecting piece 6 and the second connecting piece 7 can be arranged in a plate shape, and in order to improve the sliding stability of the first connecting piece 6, a second connecting piece extending along the first direction can be provided at the bottom of the base 1 . slide rail, and make the first connecting member 6 slide on the second slide rail through the second slide block.

In order to improve the sliding stability of the sliding assembly, in this embodiment, the sliding assembly includes a sliding member 4031 provided on the jaw assembly 4, and a sliding groove 701 provided on the second connecting member 7, and the sliding member 4031 slides in the sliding groove Inside 701. In a specific structure, the sliding groove 701 is in the shape of a long hole, and along the first direction, the sliding groove 701 is gradually inclined toward the direction in which the two jaw assemblies 4 approach each other.

Specifically, the sliding member 4031 of this embodiment is arranged at the bottom of the mounting block 403 of the jaw assembly 4, and along the first direction, and from the perspective of the left end to the right end of the base 1, the two sliding grooves 701 are integrated The top is in the shape of an "eight", so that when the push part 2 is pulled away from the stop part 3 through the first connecting part 6, the sliding groove 701 forces the two sliding parts 4031 to move away from each other, that is, the first clamping mechanism releases the grip on the battery cell. 5 while being clamped, the second clamping mechanism also releases the clamping of the battery core 5 .

In addition, in this embodiment, as a preferred implementation mode, an elastic part is provided between the linkage mechanism and the base 1, and when the first clamping mechanism and the second clamping mechanism release the cell 5, the linkage mechanism can When the elastic part is compressed and released, the first clamping mechanism and the second clamping mechanism can be driven to clamp the battery cell 5 through the linkage mechanism. Thus, the first clamping mechanism and the second clamping mechanism can automatically clamp the battery cell 5 without external force to control the linkage mechanism, so as to realize the automatic positioning of the battery cell 5 .

As shown in Fig. 2, Fig. 3, Fig. 4 and Fig. 6, the preferred implementation form, the above-mentioned elastic part includes the first elastic member 8 arranged between the resisting part 2 and the base 1, and the first elastic member 8 arranged between the two jaws The second elastic member 9 between the components 4 , the first elastic member 8 is connected to the linkage mechanism through the resisting portion 2 , and the second elastic member 9 is connected to the linkage mechanism through the two jaw assemblies 4 . Here, the cooperative arrangement of the first elastic member 8 and the second elastic member 9 has a simple structure and is easy to arrange and implement.

Here, the first elastic member 8 and the second elastic member 9 can be conventional spring products, so that the structure is simple and the cost is low. When setting specifically, the opening of the groove is provided with a fixed block 17, and the first elastic member 8 is arranged between the fixed block 17 and the connecting plate 202, and in order to realize the stable use of the first elastic member 8, it can be installed on the fixed block. 17 is provided with a guide rod 801, and a through hole for the guide rod 801 to pass through is provided on the connecting plate 202. The first elastic member 8 is sleeved on the guide rod 801, and the two ends of the first elastic member 8 are respectively abutted against the fixed block 17 and connecting plate 202. The second elastic member 9 is specifically arranged on the mounting blocks 403 of the two jaw assemblies 4 .

In addition, in this embodiment, as a preferred implementation, as shown in Figures 1 to 3, along the height direction of the base 1, the base 1 can be adjusted up and down, so that the welding jig can be sent to the welding Lower the height of the abutment 1 to avoid collision with the welding device.

The preferred form of implementation, in this embodiment, the bottom of the base 1 is provided with a base plate 10 with a support column, the base 1 is slidably arranged on the support column, and a third elastic spring is provided between the base 1 and the base 10. piece 11. In this way, the elastic adjustment of the upper and lower positions of the abutment 1 can be realized, and the convenience of changing the height of the abutment 1 can be improved, and the third elastic member 11 here can be a conventional spring product.

In this embodiment, in order to improve the stability and reliability of the elastic adjustment process of the upper and lower positions of the base 1, the base 1 is provided with a slide rail 12 extending along the height direction of the base 1, and the bottom plate 10 slides on the slide through the sliding seat 13. on track 12. Specifically, the slide rail 12 is arranged on the first mounting plate 102 extending along the height direction of the base 1 at the bottom of the base 1 , and the sliding seat 13 is arranged on the second mounting plate 102 extending along the height of the base 1 at the top of the bottom plate 10 . On the mounting plate 1001, the structure is simple and the arrangement is reasonable.

At the same time, in order to facilitate the abutment 1 to withstand the external downward force, in this embodiment, the top of the abutment 1 is provided with a pressure-bearing column 14 for receiving the depressing operation of the external depressing mechanism. In the specific structure, the number and layout of the pressure-bearing columns 14 can be set and adjusted according to the actual pressure-bearing requirements and stability requirements. For example, it can be set to four at intervals, and the four pressure-bearing Columns 14 are distributed in a rectangular shape.

In this embodiment, as shown in FIG. 1, in a preferred implementation form, the base plate 10 is provided with a detection unit 16 for detecting the distance between the base 1 and the base 10, so as to detect whether the base 1 moves down to a safe working height. . The detecting unit 16 may adopt a conventional distance measuring sensor, for example, specifically an ultrasonic distance measuring sensor, a laser distance measuring sensor or an infrared distance measuring sensor.

At the same time, in order to facilitate the arrangement of the detection unit 16, a mounting seat 1601 for mounting the detection unit 16 can be provided on the bottom plate 10, and the arrangement position of the mounting seat 1601 can be set and adjusted according to the layout requirements of the overall structure. In this embodiment, in order to realize the positioning and placement of the welding jig, the bottom plate 10 is provided with a positioning groove 1501 for positioning the placement position of the abutment 1, and the specific structural design of the positioning groove 1501 can be designed according to the actual positioning requirements. It can be fixed and adjusted, for example, it can be specifically set as a triangular groove.

It is worth mentioning that, in actual application, as shown in Figure 8, the welding jigs of this embodiment are generally set in two groups, which are used correspondingly with two groups of ultrasonic welding machines 20, so as to obtain better working efficiency, and For the convenience of operation, the two sets of welding fixtures are all set on the base 15, and the above-mentioned positioning groove 1501 is preferably set on the base 15, so as to realize the positioning of the two sets of welding fixtures.

When the welding jig of this embodiment is in use, the two first connectors 6 are simultaneously operated by the external fork carrier, so that the two first connectors 6 are synchronously away from the stopper. At this time, the two second clamps Driven by the corresponding second connecting piece 7, the holding mechanism also releases the clamping action synchronously, and then places the two batteries 5 in the two stations 101 respectively, and removes the fork carrier, and the two first connecting pieces 6. Under the action of the first elastic member 8, it slides toward the stopper 3. At this time, the two second clamping mechanisms clamp the battery cell 5 under the action of the corresponding second elastic member 9 until the battery cell 5 Clamp and fix in the first direction and the second direction.

Then, start the pressing mechanism, and the pressing mechanism presses down the abutment 1 through the pressure-bearing column 14, so that the abutment 1 is lowered to a suitable height, and then the welding jig is placed in the welding position, that is, placed corresponding to the ultrasonic welding machine 20, placed The process can be positioned through the positioning groove 1501, and then the welding operation is performed on the battery cell 5. After the welding operation is completed, the welding jig is removed, the pressing operation of the pressing mechanism is removed, and the first clamping is released by the fork carrier The electric core 5 can be taken out by clamping the electric core 5 by the mechanism and the second clamping mechanism, thereby completing the welding operation.

The welding jig of this embodiment can clamp the electric core 5 in two different directions through the cooperation of the first clamping mechanism and the second clamping mechanism, which is beneficial to realize the positioning and fixing of the electric core 5, and The setting of the linkage mechanism can also realize the synchronous operation of the first clamping mechanism and the second clamping mechanism, improve the convenience of operation, and have a good use effect.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (10)

1. The utility model provides a welding jig which characterized in that:

comprises a base station (1) capable of placing a battery cell (5) and a positioning device arranged on the base station (1);

the positioning device comprises a first clamping mechanism capable of clamping the battery cell (5) along a first direction, a second clamping mechanism capable of clamping the battery cell (5) along a second direction, and a linkage mechanism connected between the first clamping mechanism and the second clamping mechanism, wherein the linkage mechanism is used for driving the first clamping mechanism and the second clamping mechanism to synchronously clamp or release the battery cell (5).

2. The welding jig of claim 1, wherein:

a station (101) for placing the battery cell (5) is arranged on the base station (1);

the first clamping mechanism comprises a pushing part (2) and a stopping part (3) which are oppositely arranged at two sides of the station (101) along the first direction, and the second clamping mechanism comprises a clamping jaw assembly (4) which is oppositely arranged at two sides of the station (101) along the second direction;

the linkage mechanism is connected between the pushing part (2) and the two clamping jaw assemblies (4), and under the driving of the linkage mechanism, the pushing part (2) can be close to or far away from the stop part (3) and the two clamping jaw assemblies (4) can be close to or far away from each other.

3. The welding jig of claim 2, wherein:

the linkage mechanism comprises a first connecting piece (6) arranged at the bottom of the base (1) in a sliding manner along the first direction and a second connecting piece (7) arranged on the first connecting piece (6), the first connecting piece (6) is connected with the pushing part (2), and the second connecting piece (7) is connected with each clamping jaw assembly (4) through a sliding assembly;

when the first connecting piece (6) is close to or far away from the stop part (3) along the first direction, the second connecting piece (7) can drive the two clamping jaw assemblies (4) to be close to or far away from each other through the two sliding assemblies respectively.

4. The welding jig of claim 3, wherein:

the sliding assembly comprises a sliding piece (4031) arranged on the clamping jaw assembly (4) and a sliding groove (701) arranged on the second connecting piece (7), and the sliding piece (4031) slides in the sliding groove (701);

the sliding groove (701) is in a strip hole shape, and along the first direction, the sliding groove (701) is gradually inclined towards the direction that the two clamping jaw assemblies (4) are close to each other.

5. The welding jig of claim 2, wherein:

an elastic part is arranged between the linkage mechanism and the base station (1);

when the first clamping mechanism and the second clamping mechanism release the battery cell (5), the elastic part can be compressed through the linkage mechanism, and when the elastic part releases energy, the first clamping mechanism and the second clamping mechanism can be driven by the linkage mechanism to clamp the battery cell (5).

6. The welding jig of claim 5, wherein:

the elastic part comprises a first elastic piece (8) arranged between the pushing part (2) and the base (1), and a second elastic piece (9) arranged between the two clamping jaw assemblies (4), the first elastic piece (8) is connected with the linkage mechanism through the pushing part (2), and the second elastic piece (9) is connected with the linkage mechanism through the two clamping jaw assemblies (4).

7. The welding jig according to any one of claims 1 to 6, wherein:

along the height direction of the base station (1), the base station (1) is arranged in an up-down adjustable way.

8. The welding jig of claim 7, wherein:

a bottom plate (10) with a supporting column is arranged below the base station (1), the base station (1) is arranged on the supporting column in a sliding mode, and a third elastic piece (11) is arranged between the base station (1) and the bottom plate (10).

9. The welding jig of claim 8, wherein:

a sliding rail (12) extending along the height direction of the base (1) is arranged on the base (1), and the bottom plate (10) slides on the sliding rail (12) through a sliding seat (13); and/or the number of the groups of groups,

the top of the base (1) is provided with a bearing column (14) for bearing the pressing operation of an external pressing mechanism.

10. The welding jig of claim 8, wherein:

a positioning groove (1501) for positioning the placement position of the base (1) is formed in the bottom plate (10); and/or the number of the groups of groups,

the base plate (10) is provided with a detection unit (16) for detecting the distance between the base station (1) and the base plate (10).

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