Automobile power battery pack positioning and disassembling tool

Abstract

The utility model relates to a kind of automobile power battery pack positioning dismounting tool, including lifting platform, positioning frame is installed on lifting platform, to be dismounted battery pack is placed on positioning frame, lifting platform drives positioning frame to move up and down and make to be dismounted battery pack and vehicle body close or away, positioning pin is vertically arranged and is installed on positioning frame, positioning pin is located on positioning frame and is provided with multiple groups, the position of multiple groups of positioning pin on positioning frame is adjustable, positioning pin and the positioning hole of automobile body are inserted or separated, the dismounting tool can make battery pack and vehicle body accurate positioning, ensure the accuracy of battery pack and vehicle body installation position, avoid battery pack damage, since the position of positioning pin on positioning frame is adjustable, improve the applicability of multiple brand vehicle models improve power battery pack dismounting maintenance efficiency, avoid the damage of plug-in component caused by inaccurate positioning during power battery pack dismounting process, reduce maintenance cost and the procurement cost of special equipment of maintenance enterprise, it is beneficial to new energy automobile maintenance enterprise to reduce cost and increase efficiency.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle battery disassembly and assembly technology, and in particular to a positioning and disassembly tooling for automotive power battery packs. Background Technology

[0002] Currently, the disassembly and repair of power battery packs for new energy vehicles often involves using a gantry lift to lift the entire vehicle, followed by a power battery pack disassembly and assembly platform to remove the battery pack from the bottom of the vehicle. This disassembly process does not require precise positioning of the battery pack relative to the vehicle body, allowing for rapid removal. However, during installation, conventional power battery pack disassembly and assembly platforms can only make minor horizontal adjustments to the battery pack's position, and some platforms can adjust the horizontal tilt angle. Neither can achieve precise positioning of the battery pack relative to the vehicle body. Due to the battery swapping model and the integrated battery design, the installation and positioning of the high and low voltage connectors connecting the power battery pack to the vehicle body are subject to strict requirements. Inaccurate installation can damage these connectors, or even cause deformation or damage, potentially preventing the vehicle from receiving high-voltage electricity and operating normally. It could even lead to more serious consequences such as battery pack casing deformation, electrode short circuits, or vehicle fires. Utility Model Content

[0003] The purpose of this utility model is to provide a positioning and disassembly tool for automotive power battery packs, which can accurately position the battery pack and the vehicle body, ensuring the accuracy of the installation position of the battery pack and the vehicle body, and avoiding damage to the battery pack.

[0004] The technical solution adopted in this utility model is as follows: A positioning and disassembly tooling for automotive power battery packs, including Lifting platform; A positioning frame is installed on the lifting platform, and the battery pack to be removed is placed on the positioning frame. The lifting platform drives the positioning frame to move up and down, so that the battery pack to be removed is closer to or further away from the vehicle body. Positioning pins are vertically arranged and installed on the positioning frame. Multiple sets of positioning pins are provided on the positioning frame, and the positions of the multiple sets of positioning pins on the positioning frame are adjustable. The positioning pins are inserted into or separated from the positioning holes of the car body.

[0005] This utility model also has the following technical features: In one embodiment of this utility model, a support arm is further included. The support arm is movably mounted on the positioning frame, and the positioning pin is vertically arranged on the support arm. The position of the positioning pin on the support arm is adjustable.

[0006] In one embodiment of this utility model, two sets of support arms are provided on the positioning frame. The support arm is generally in the shape of a strip. One end of the support arm is hinged to the positioning frame and the hinge axis is parallel to the positioning pin. The adjustment mechanism is used to adjust the rotation angle of the support arm around the hinge axis.

[0007] In one embodiment of this utility model, a clearance strip is provided at the hinge end away from the support arm. The clearance strip is generally semi-circular or semi-circular in shape, and the positioning pin is vertically arranged on the clearance strip.

[0008] In one embodiment of this utility model, the positioning pin is tubular in shape, a spring is provided inside the cavity of the positioning pin, and an insert rod is slidably provided inside the positioning pin, with the lower end of the insert rod abutting against the upper end of the spring.

[0009] In one embodiment of the present invention, the adjusting mechanism includes an adjusting arm, a support arm having a strip-shaped hole, the strip-shaped hole being arranged in multiple sets at intervals along the length of the support arm, one end of the adjusting arm having a plug-in slide rod, the plug-in slide rod being slidably disposed in the strip-shaped hole, and the other end of the adjusting arm being hinged to a first slider with the hinge axis being parallel to the positioning pin.

[0010] In one embodiment of this utility model, a second slider is provided on the positioning frame, one end of the two sets of support arms is hinged to the second slider, a first nut is provided on the first slider, a second nut is provided on the second slider, the first nut cooperates with a first lead screw, the second nut cooperates with a second lead screw, the first lead screw and the second lead screw are arranged in parallel, and the first lead screw and the second lead screw are rotatably mounted on the positioning frame.

[0011] In one embodiment of this utility model, the first lead screw and the second lead screw are provided with an external hexagonal segment at one end extending out of the positioning frame.

[0012] In one embodiment of this utility model, the second lead screw passes through the first slider and forms a sliding fit, the first lead screw passes through the second slider and forms a sliding fit, the first slider and the second slider are both slidably mounted on the guide slide rod, and the guide slide rod is fixed on the positioning frame and parallel to the first lead screw.

[0013] In one embodiment of this utility model, the positioning frame is in the shape of a rectangular frame, and at least three sets of supporting beams are provided on the positioning frame. The three sets of supporting beams are parallel to each other, and anti-slip pads are provided at intervals on the supporting beams. The battery pack to be disassembled or installed rests against the anti-slip pads.

[0014] In one embodiment of the present invention, a first horizontal beam is provided on both sides of the positioning frame, a first positioning plate is provided on the first horizontal beam, the first positioning plate is arranged vertically, and a second horizontal beam is provided at one end of the positioning frame, a second positioning plate is provided on the second horizontal beam, the second positioning plate is arranged vertically. In one embodiment of this utility model, the first horizontal beam is connected to the positioning frame via a first hinge, and the second horizontal beam is connected to the positioning frame via a second hinge.

[0015] Compared with existing technologies, the beneficial effects of this utility model are reflected in the following: In actual use, after the car is lifted, the positioning frame is installed on the lifting platform. By starting the lifting platform, the positioning frame is made vertical and the positioning pin is inserted into the positioning hole of the car body, thereby ensuring that the positioning frame can be accurately combined with the battery pack to support the battery pack and accurately complete the disassembly and assembly of the battery pack. Once battery pack maintenance is complete, the battery pack is placed on the positioning frame. By activating the lifting platform, the positioning pins are inserted into the positioning holes on the vehicle body, allowing the battery pack to be accurately guided into its mounting position on the vehicle body. This ensures the precise installation of high and low voltage connectors and cooling connectors, preventing misalignment. Therefore, this disassembly and assembly fixture enables precise positioning of the battery pack and the vehicle body, ensuring the accuracy of the battery pack's installation position and preventing damage to the battery pack. Because the position of the positioning pins on the positioning frame is adjustable, it improves applicability to various vehicle brands, increases the efficiency of power battery pack disassembly and repair, avoids damage to connectors caused by inaccurate positioning during the power battery pack disassembly and assembly process, reduces repair costs and the procurement costs of specialized equipment for repair companies, and is beneficial for new energy vehicle repair companies to reduce costs and increase efficiency. Attached Figure Description

[0016] Figure 1 This is a plan view of the automotive power battery pack positioning and disassembly tooling in use within a gantry in one embodiment of the present invention; Figure 2 and Figure 3 This is a schematic diagram of two perspectives of the positioning and disassembly fixture for an automotive power battery pack in one embodiment of this utility model; Figure 4 This is a plan view of a positioning and disassembly fixture for an automotive power battery pack in one embodiment of the present invention; Figure 5 This is a front view of a positioning and disassembly fixture for an automotive power battery pack according to one embodiment of the present invention; Figure 6 This is a left view of a positioning and disassembly fixture for an automotive power battery pack in one embodiment of the present invention. Detailed Implementation

[0017] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0018] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0019] It's important to note that there are numerous new energy vehicle brands, and even within the same brand, different models exist. The battery packs and vehicle body installation structures differ between these models. Currently, when disassembling and repairing new energy vehicle power battery packs, a gantry lift is commonly used to lift the entire vehicle, followed by a battery pack removal and installation platform to remove the battery pack from the bottom of the vehicle. This method doesn't require precise positioning of the battery pack relative to the vehicle body and allows for quick removal. However, during installation, the conventional battery pack removal and installation platform can only handle the battery pack... While the equipment platform can make minor adjustments to the horizontal position, and some platforms can adjust the horizontal tilt angle, none of them can achieve precise positioning and installation of the battery pack relative to the vehicle body. Due to the battery swapping mode and the integrated battery design, the installation and positioning of the high and low voltage connectors connecting the power battery pack to the vehicle body are subject to strict requirements. Inaccurate installation can damage the high and low voltage connectors, or even cause deformation or damage to the power battery pack connectors, potentially preventing the entire vehicle from operating normally with high voltage. It could even lead to more serious consequences such as deformation of the power battery pack casing, electrode short circuits, or vehicle fires. To address this issue, this utility model proposes a positioning and disassembly fixture for an automotive power battery pack, comprising a lifting platform 10; a positioning frame 20, mounted on the lifting platform 10, with the battery pack to be disassembled placed on the positioning frame 20, the lifting platform 10 driving the positioning frame 20 to move up and down, causing the battery pack to be disassembled to move closer to or further away from the vehicle body; and positioning pins 30, vertically arranged and mounted on the positioning frame 20, with multiple sets of positioning pins 30 located on the positioning frame 20, and the positions of the multiple sets of positioning pins 30 on the positioning frame 20 being adjustable, the positioning pins 30 being inserted into or separated from the positioning holes on the vehicle body.

[0020] In one embodiment, multiple positioning holes are provided on the lower part of the vehicle body. These positioning holes determine the mounting reference points for various components of the vehicle. Therefore, the connection position between the battery pack and the vehicle body can be accurately determined through these positioning holes, ensuring precise installation and removal of the battery pack and the vehicle body. This avoids damage to the connecting components between the battery pack and the vehicle body during installation and removal, especially components such as the high and low voltage connectors and coolant connectors connecting the power battery pack to the vehicle body. Depending on the vehicle model, the positioning pin 30 is pre-adjusted to the position of the positioning bracket 20 so that when the positioning bracket 20 is raised, the positioning pin 30 can be accurately inserted into the positioning hole in the vehicle body.

[0021] In one embodiment, see Figure 1 Maintenance personnel adjust the position of the positioning pin 30 on the positioning bracket 20 according to different vehicle models to ensure that the positioning pin 30 can be accurately inserted into the positioning hole. The lifting platform 10 is an existing hydraulic or electric lifting platform with rollers for easy pushing and transfer. When performing maintenance or installation on battery pack A, the lifting gantry lifts car B, and the lifting platform 10 moves to a position below car B. By activating the lifting platform 10, the positioning bracket 20 rises, allowing the positioning pin 30 to be inserted into the positioning hole on the car body, enabling the disassembly of battery pack A with precision. Similarly, after maintenance of battery pack A is completed, activating the lifting platform 10 allows the positioning pin 30 to be inserted into the positioning hole on car body B, thereby ensuring the accuracy of the installation position of battery pack A and car body B, ensuring the accurate installation of high and low voltage connectors and cooling connectors, and avoiding misalignment.

[0022] In one embodiment, the disassembly and assembly fixture further includes a support arm 40, which is movably mounted on the positioning frame 20. The positioning pin 30 is vertically arranged on the support arm 40, and the position of the positioning pin 30 on the support arm 40 is adjustable.

[0023] The aforementioned support arm 40 and positioning frame 20 are in a movable assembly relationship, which can adjust the position of the support arm 40 on the positioning frame 20, thereby changing the position between the positioning pin 30 and the positioning frame 20 to adapt to the battery pack installation requirements of different vehicle models.

[0024] In one embodiment, two sets of support arms 40 are provided on the positioning frame 20. The support arms 40 are generally in the shape of a strip. One end of the support arm 40 is hinged to the positioning frame 20 and the hinge axis is parallel to the positioning pin 30. The adjustment mechanism is used to adjust the rotation angle of the support arm 40 around the hinge axis.

[0025] The two sets of support arms 40 are symmetrically hinged to the positioning frame 20. The positioning pin 30 is vertically installed at the cantilever end of the support arm 40. The position of the cantilever end of the two sets of support arms 40 can be adjusted by adjusting the rotation angle of the hinge axis between the support arm 40 and the positioning frame 20, thereby adjusting the position between the positioning pin 30 and the positioning frame 20. The actual adjustment is highly efficient.

[0026] In one embodiment, to facilitate the installation and removal of the battery bolts, a clearance strip 41 is provided at the hinge end away from the support arm 40. The clearance strip 41 is generally semi-circular or semi-circular, and the positioning pin 30 is vertically arranged on the clearance strip 41.

[0027] After the aforementioned positioning pin 30 is inserted into the positioning hole of the vehicle body, since the clearance strip 41 is an arc-shaped plate, there is a clearance area in the middle of the clearance strip 41, which avoids the clearance strip 41 from blocking the battery bolt and facilitates the disassembly and assembly of the battery bolt.

[0028] In one embodiment, the clearance strip 41 has multiple sets of mounting holes, and the positioning pin 30 is vertically installed in the mounting holes, so that the positioning pin 30 is located in different mounting holes, and the installation position of the positioning pin 30 can be coarsely adjusted.

[0029] In one embodiment, the positioning pin 30 is generally tubular, a spring is provided inside the cavity of the positioning pin 30, and an insert rod is slidably provided inside the positioning pin 30, with the lower end of the insert rod abutting against the upper end of the spring.

[0030] When the aforementioned lifting platform 10 rises, the positioning pin 30 first engages with the positioning hole on the vehicle body. As the positioning pin 30 rises, the insert rod inside the positioning pin 30 engages with the positioning hole on the vehicle body. As the lifting platform 10 continues to rise, the spring is compressed until the positioning frame 20 is raised to the set position.

[0031] In one embodiment, the end face of the insert in the positioning pin 30 has a different shape, which can be rod-shaped or irregular structure. According to the structure of the positioning hole in the vehicle body, the lower end of the positioning pin 30 is provided with a mounting screw. The mounting screw can be fixed with the mounting hole on the clearance strip 41 and is also convenient for disassembly and assembly.

[0032] In one embodiment, the adjustment mechanism includes an adjustment arm 42, and an adjustment hole 43 is provided on the support arm 40. Multiple sets of adjustment holes 43 are arranged at intervals along the length direction of the support arm 40. One end of the adjustment arm 42 is provided with a plug-in slide rod, which is slidably disposed in the adjustment hole 43. The other end of the adjustment arm 42 is hinged to the first slider 44 and the hinge axis is parallel to the positioning pin 30.

[0033] Specifically, the positioning frame 20 is provided with a second slider 45, one end of the two sets of support arms 40 is hinged to the second slider 45, the first slider 44 is provided with a first nut 441, the second slider 45 is provided with a second nut 451, the first nut 441 cooperates with a first lead screw 442, the second nut 451 cooperates with a second lead screw 452, the first lead screw 442 and the second lead screw 452 are arranged in parallel, and the first lead screw 442 and the second lead screw 452 are rotatably mounted on the positioning frame 20.

[0034] In the above embodiments, by rotating the first lead screw 442 while keeping the second lead screw 452 stationary, the first slider 44 can slide horizontally, thereby causing the adjusting arm 42 to rotate around the hinge axis, thus adjusting the angle of the support arm 40 at the hinge axis of the second slider 45, and consequently adjusting the position of the positioning pin 30 in the positioning frame 20. Alternatively, by rotating the second lead screw 452 while keeping the first lead screw 442 stationary, the second slider 45 can slide, thereby adjusting the angle of the support arm 40 at the hinge axis of the second slider 45, and consequently adjusting the position of the positioning pin 30 in the positioning frame 20. Furthermore, by rotating both the second lead screw 452 and the first lead screw 442, the first slider 44 and the second slider 45 can slide synchronously closer or further apart, significantly improving the adjustment speed of the positioning pin 30 in the positioning frame 20.

[0035] In one embodiment, to facilitate operation by maintenance personnel, the ends of the first lead screw 442 and the second lead screw 452 extending out of the positioning frame 20 are provided with external hexagonal sections. Maintenance personnel can quickly adjust the position of the positioning pin 30 in the positioning frame 20 by holding an Allen wrench and turning the external hexagonal sections at the extended ends of the first lead screw 442 and the second lead screw 452.

[0036] In one embodiment, to guide the movement of the first slider 44 and the second slider 45, the second lead screw 452 passes through the first slider 44 and forms a sliding engagement, the first lead screw 442 passes through the second slider 45 and forms a sliding engagement, the first slider 44 and the second slider 45 are both slidably mounted on the guide slide rod 46, the guide slide rod 46 is fixed on the positioning frame 20 and is parallel to the first lead screw 442.

[0037] In the above embodiments, a guide sleeve is provided on the first slider 44, the second lead screw 452 passes through the guide sleeve and cooperates with the guide slide rod 46 to form a sliding guide, and a guide sleeve is provided on the second slider 45, the first lead screw 442 passes through the guide sleeve and cooperates with the guide slide rod 46 to form a sliding guide.

[0038] In one embodiment, in order to support the lower surface of the battery pack, the positioning frame 20 is generally rectangular in shape, and at least three sets of support beams 21 are provided on the positioning frame 20. The three sets of support beams 21 are parallel to each other, and anti-slip pads 21 are provided at intervals on the support beams 21. The battery pack to be disassembled and assembled rests against the anti-slip pads 211.

[0039] The aforementioned anti-slip pad 21 can be made of rubber to reduce scratches on the outer wall of the battery pack.

[0040] In one embodiment, to secure the edge of the battery pack, a first horizontal beam 22 is provided on both sides of the positioning frame 20, and a first positioning plate 221 is provided on the first horizontal beam 22. The first positioning plate 221 is arranged vertically. A second horizontal beam 23 is provided at one end of the positioning frame 20, and a second positioning plate 231 is provided on the second horizontal beam 23. The second positioning plate 231 is arranged vertically.

[0041] In one embodiment, to reduce the space occupied by the entire assembly and disassembly fixture, the first horizontal beam 22 is connected to the positioning frame 20 via a first hinge, and the second horizontal beam 23 is connected to the positioning frame 20 via a second hinge.

[0042] When using the above-mentioned disassembly and assembly tooling, the first horizontal beam 22 and the second horizontal beam 23 are unfolded around the first hinge and the second hinge. After use, the first horizontal beam 22 and the second horizontal beam 23 are folded and stored around the first hinge and the second hinge to reduce the space occupied by the entire disassembly and assembly tooling.

[0043] In one embodiment, the first positioning plate 221 is detachably connected to the first horizontal beam 22, and the second positioning plate 231 is detachably connected to the second horizontal beam 23. They can be fixedly installed by installing right-angle connecting pieces. The position of the first positioning plate 221 on the first horizontal beam 22 is adjustable, and the position of the second positioning plate 231 on the second horizontal beam 23 is adjustable.

[0044] In one embodiment, the positioning frame 20 is provided with a mounting plate 24 for fixing to the lifting platform 10. The mounting plate 24 is provided with holes. After the positioning frame 20 is snapped onto the lifting platform 10, it can be fixedly connected to the holes on the lifting platform 10 by screws.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A positioning and disassembly fixture for an automotive power battery pack, characterized in that: include Lifting platform (10); A positioning frame (20) is installed on the lifting platform (10), and the battery pack to be removed is placed on the positioning frame (20). The lifting platform (10) drives the positioning frame (20) to move up and down, so that the battery pack to be removed is close to or away from the vehicle body. Positioning pins (30) are arranged vertically and installed on the positioning frame (20). Multiple sets of positioning pins (30) are provided on the positioning frame (20), and the positions of the multiple sets of positioning pins (30) on the positioning frame (20) are adjustable. The positioning pins (30) are inserted into or separated from the positioning holes of the car body.

2. The automotive power battery pack positioning and disassembly fixture according to claim 1, characterized in that: It also includes a support arm (40), which is movably mounted on the positioning frame (20), and the positioning pin (30) is vertically arranged on the support arm (40). The position of the positioning pin (30) on the support arm (40) is adjustable.

3. The automotive power battery pack positioning and disassembly fixture according to claim 2, characterized in that: The support arm (40) is located on the positioning frame (20) and there are two sets of the support arm (40). The support arm (40) is in the shape of a strip. One end of the support arm (40) is hinged to the positioning frame (20) and the hinge axis is parallel to the positioning pin (30). The adjustment mechanism is used to adjust the rotation angle of the support arm (40) around the hinge axis.

4. The automotive power battery pack positioning and disassembly fixture according to claim 3, characterized in that: A clearance strip (41) is provided at the hinge end away from the support arm (40). The clearance strip (41) is generally semi-circular or semi-circular. The positioning pin (30) is vertically arranged on the clearance strip (41).

5. The automotive power battery pack positioning and disassembly fixture according to claim 4, characterized in that: The positioning pin (30) is tubular in shape. A spring is provided inside the cavity of the positioning pin (30). A rod is slidably provided inside the positioning pin (30). The lower end of the rod abuts against the upper end of the spring.

6. The automotive power battery pack positioning and disassembly fixture according to claim 3, characterized in that: The adjustment mechanism includes an adjustment arm (42), and an adjustment hole (43) is provided on the support arm (40). Multiple sets of adjustment holes (43) are arranged at intervals along the length direction of the support arm (40). One end of the adjustment arm (42) is provided with a plug-in slide rod, which is slidably disposed in the adjustment hole (43). The other end of the adjustment arm (42) is hinged to the first slider (44), and the hinge axis is parallel to the positioning pin (30).

7. The automotive power battery pack positioning and disassembly fixture according to claim 6, characterized in that: The positioning frame (20) is provided with a second slider (45), one end of the two sets of support arms (40) is hinged to the second slider (45), the first slider (44) is provided with a first nut (441), the second slider (45) is provided with a second nut (451), the first nut (441) cooperates with the first lead screw (442), the second nut (451) cooperates with the second lead screw (452), the first lead screw (442) and the second lead screw (452) are arranged in parallel, and the first lead screw (442) and the second lead screw (452) are rotatably mounted on the positioning frame (20); The first lead screw (442) and the second lead screw (452) are provided with an external hexagonal segment at one end extending out of the positioning frame (20).

8. The automotive power battery pack positioning and disassembly fixture according to claim 7, characterized in that: The second lead screw (452) passes through the first slider (44) and forms a sliding fit. The first lead screw (442) passes through the second slider (45) and forms a sliding fit. The first slider (44) and the second slider (45) are both slidably mounted on the guide slide rod (46). The guide slide rod (46) is fixed on the positioning frame (20) and is parallel to the first lead screw (442).

9. The automotive power battery pack positioning and disassembly fixture according to claim 1, characterized in that: The positioning frame (20) is in the shape of a rectangular frame. At least three sets of support beams (21) are provided on the positioning frame (20). The three sets of support beams (21) are parallel to each other. Anti-slip pads (211) are provided at intervals on the support beams (21). The battery pack to be disassembled and installed rests against the anti-slip pads (211).

10. The automotive power battery pack positioning and disassembly fixture according to claim 9, characterized in that: The positioning frame (20) is provided with a first horizontal beam (22) on both sides, and a first positioning plate (221) is provided on the first horizontal beam (22). The first positioning plate (221) is arranged vertically. The positioning frame (20) is provided with a second horizontal beam (23) at one end, and a second positioning plate (231) is provided on the second horizontal beam (23). The second positioning plate (231) is arranged vertically. The first horizontal beam (22) is connected to the positioning frame (20) via a first hinge, and the second horizontal beam (23) is connected to the positioning frame (20) via a second hinge.

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