High-safety lithium battery pack assembling device

Abstract

The utility model discloses a high-safety lithium battery pack assembling device. The high-safety lithium battery pack assembling device comprises a conveying belt, a protection plate, a protection baffle, a supporting vertical plate, a mounting plate and a material distributing mechanism, according to the high-safety lithium battery pack assembling device disclosed by the utility model, a lithium battery shell can be conveniently conveyed in the assembling process through the conveying belt, the two sides of a lithium battery in the conveying process are protected through the protection plates, and the upper end surface of the lithium battery is protected through the protection baffles, so that the lithium battery shell is prevented from falling off from the conveying belt; and the distributing mechanism is convenient for distributing the lithium battery shells at the discharging end of the conveying belt, so that the lithium battery shells are prevented from being stacked at the discharging end, and the assembling efficiency of the lithium batteries is effectively ensured.

Description

Technical Field

[0001] The utility model relates to the technical field related to lithium battery packs, in particular to a high-safety lithium battery pack assembly device. Background Art

[0002] With the widespread use of digital products such as mobile phones and laptops, lithium-ion batteries have been widely used in these products due to their excellent performance, and are gradually developing into other product application fields. Lithium batteries are batteries that use lithium metal or lithium alloy as anode materials and non-aqueous electrolyte solutions;

[0003] At present, the existing publication number CN216850054U is a lithium battery assembly device, including a shell conveying mechanism, a shell feeding mechanism and an inner core feeding mechanism; the shell conveying mechanism is used to convey the aluminum shell of the lithium battery; the shell feeding mechanism is used to load the aluminum shell, and the inner core feeding mechanism is used to load the inner core. The shell conveying mechanism, the shell feeding mechanism and the inner core feeding mechanism facilitate the assembly operation of the lithium battery, thereby improving the efficiency of the assembly of the inner core and the outer shell of the lithium battery, wherein the shell conveying mechanism can continuously convey the shell, thereby improving the efficiency of the conveying, and when the outer shell passes through the inner core feeding mechanism during the conveying, it is convenient to carry out the filling operation of the inner core, the shell feeding mechanism can continuously push the shell to move toward the shell conveying mechanism, thereby finally realizing the automatic loading operation of the outer shell, and the inner core feeding mechanism not only facilitates the automatic feeding operation of the inner core, but also realizes the assembly operation of the inner core and the outer shell.

[0004] However, due to its own design characteristics, the above-mentioned current lithium battery assembly equipment is not convenient for separating the shells in the conveying mechanism, which easily causes the shells to accumulate at the discharge end of the conveying mechanism, thereby reducing the efficiency of assembling the shells and the inner core. Utility Model Content

[0005] The purpose of the utility model is to provide a high-safety lithium battery pack assembly device, aiming to improve the current lithium battery assembly equipment, which is not convenient for separating the shells in the conveying mechanism due to its own design characteristics, so that the shells are easily piled up at the discharge end of the conveying mechanism, thereby reducing the efficiency of assembling the shells and the inner core.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a high-safety lithium battery pack assembly device, including a conveyor belt, protective plates respectively arranged on both sides of the conveyor belt, protective baffles fixedly arranged on the upper end surfaces of the protective plates on each side, a supporting vertical plate fixedly arranged at the discharge end of the conveyor belt, a mounting plate fixedly arranged on the inner side of the supporting vertical plate, and a material dividing mechanism arranged between the supporting vertical plate and the mounting plate.

[0007] By adopting the above technical scheme, the conveyor belt is convenient for conveying the lithium battery shells during the assembly process, and the protective plates are used to protect both sides of the lithium battery during the conveying process. The protective baffle protects the upper end surface of the lithium battery to prevent the lithium battery shells from falling off the conveyor belt. The dividing mechanism is convenient for diverting the lithium battery shells at the discharge end of the conveyor belt to prevent the lithium battery shells from piling up at the discharge end, thereby effectively ensuring the efficiency of lithium battery assembly.

[0008] Optionally, the protective plate is arranged in the length direction of the conveyor belt, one end of the protective baffle is arranged on the same horizontal plane as the feed end of the conveyor belt, and the other end of the protective baffle is arranged relative to the discharge end of the conveyor belt.

[0009] By adopting the above technical solution, such a design avoids the position interference between the dividing mechanism and the protective baffle when dividing the lithium battery body at the discharge end.

[0010] Optionally, the material dividing mechanism includes a first material dividing plate, a second material dividing plate arranged opposite to the first material dividing plate, a first connecting plate connected to the upper end surface of the first material dividing plate, a second connecting plate connected to the upper end surface of the second material dividing plate, and a driving assembly for driving the first connecting plate and the second connecting plate, and the first material dividing plate and the second material dividing plate are respectively arranged in sequence in the discharge direction of the lithium battery shell.

[0011] By adopting the above technical solution, the purpose of discharging and blocking the lithium battery shell during the conveying process can be easily achieved through the first dividing plate and the second dividing plate.

[0012] Optionally, the first material dividing plate and the first connecting plate as well as the second material dividing plate and the second connecting plate are connected respectively by fixing screws.

[0013] By adopting the above technical solution, the fixing screws pass through the first connecting plate and the second connecting plate to connect the first dividing plate and the second dividing plate, thereby effectively ensuring the stability of the connection between the first dividing plate and the first connecting plate and the second dividing plate and the second connecting plate, and facilitating the rapid disassembly and assembly of the first dividing plate and the second dividing plate.

[0014] Optionally, the first material dividing plate and the second material dividing plate are respectively provided with buffer pads at one end away from the connection between the first connecting plate and the second connecting plate, and the buffer pads are connected to the first material dividing plate and the second material dividing plate by polymer bonding, and the inclination of the buffer pads decreases successively in the direction away from the first material dividing plate and the second material dividing plate.

[0015] By adopting the above technical solution and the design of the buffer pad, damage to the lithium battery shell when the first dividing plate and the second dividing plate come into contact with the lithium battery shell is avoided, thereby effectively improving the finished product rate of lithium battery assembly.

[0016] Optionally, the driving assembly includes a support shaft fixed between the supporting vertical plate and the mounting plate, a rotating seat rotatably connected to the support shaft, a first connecting seat fixedly arranged on one side of the rotating seat, a second connecting seat fixedly arranged on the other side of the rotating seat, a third connecting seat fixedly arranged on the upper end surface of the rotating seat, a connecting member connected to the third connecting seat, an electric telescopic shaft connected to the other end of the connecting member, and a mounting seat for fixing the electric telescopic shaft and fixedly connected to the supporting vertical plate, a bushing is provided at the connection between the rotating seat and the support shaft, the bushing is rotatably connected to the support shaft, and the bushing is connected to the rotating seat through a spline.

[0017] By adopting the above technical solution, the rotating seat can be easily rotated with the supporting shaft as the central axis.

[0018] Optionally, the first connecting seat is connected to one end of the first connecting plate away from the first material dividing plate, the second connecting seat is connected to one end of the second connecting plate away from the second material dividing plate, and a connecting pin is provided at the connection between the first connecting seat and the first connecting plate, and a connecting pin is provided at the connection between the second connecting seat and the second connecting plate.

[0019] By adopting the above technical solution, it is convenient to connect the first connecting seat with the first connecting plate through the connecting pin, the second connecting seat with the second connecting plate, and the extended end of the electric telescopic shaft is fixedly connected to the connecting piece.

[0020] Optionally, one end of the connecting member away from the protruding end is also connected to the third connecting seat via a connecting pin.

[0021] By adopting the above technical scheme, it is convenient to drive the rotating seat to rotate with the support shaft as the center axis through the linear movement of the extended end of the electric telescopic shaft, thereby driving the first connecting plate and the second connecting plate to reciprocate up and down, and driving the first material dividing plate and the second material dividing plate to reciprocate up and down, thereby facilitating the purpose of discharging and blocking the lithium battery shell during the conveying process through the first material dividing plate and the second material dividing plate.

[0022] Optionally, it also includes sliding blocks fixedly arranged on the outer sides of the first connecting plate and the second connecting plate respectively, and sliding grooves arranged on the inner side of the mounting plate and adapted to the sliding blocks.

[0023] By adopting the above technical solution, the slider and the slide groove cooperate with each other to facilitate the guidance of the first connecting plate and the second connecting plate during the up and down movement, thereby effectively ensuring the stability of the first connecting plate and the second connecting plate during movement.

[0024] Compared with the prior art, the utility model has the following beneficial effects: the utility model has the characteristics of reasonable design and simple operation. The utility model is a high-safety lithium battery pack assembly device.

[0025] (1) The material dividing mechanism includes a first material dividing plate, a second material dividing plate, a first connecting plate, a second connecting plate and a driving assembly, wherein the driving assembly is convenient for driving the first connecting plate and the second connecting plate to reciprocate up and down, and is convenient for driving the first material dividing plate and the second material dividing plate to reciprocate up and down, thereby facilitating the first material dividing plate and the second material dividing plate to achieve the purpose of discharging and blocking the lithium battery shell during the conveying process through the first material dividing plate and the second material dividing plate. The first material dividing plate and the first connecting plate, as well as the second material dividing plate and the second connecting plate are respectively connected by fixing screws, and the fixing screws pass through the first connecting plate and the second connecting plate and are connected to the first material dividing plate and the second material dividing plate, thereby effectively ensuring the stability of the connection between the first material dividing plate and the first connecting plate, as well as the second material dividing plate and the second connecting plate, and facilitating the rapid disassembly and assembly of the first material dividing plate and the second material dividing plate.

[0026] (2) The driving assembly includes a support shaft, a rotating seat, a first connecting seat, a second connecting seat, a third connecting seat, a connecting piece, an electric telescopic shaft and a mounting seat. The linear motion of the extended end of the electric telescopic shaft drives the rotating seat to rotate around the support shaft as the central axis, thereby facilitating the first connecting plate and the second connecting plate to reciprocate up and down, and facilitating the first dividing plate and the second dividing plate to reciprocate up and down, thereby facilitating the first dividing plate and the second dividing plate to achieve the purpose of discharging and blocking the lithium battery shell during the conveying process through the first dividing plate and the second dividing plate.

[0027] (3) It also includes a slider and a slide groove fixedly arranged on the outer sides of the first connecting plate and the second connecting plate respectively. The slider and the slide groove cooperate with each other to facilitate guiding the first connecting plate and the second connecting plate during the up and down movement, thereby effectively ensuring the stability of the first connecting plate and the second connecting plate during movement.

[0028] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 This is a schematic diagram of the overall structure of the high-safety lithium battery assembly device of the utility model;

[0031] Figure 2 It is a high-safety lithium battery pack assembly device of the utility model. Figure 1 A structural diagram from another perspective;

[0032] Figure 3 It is a structural schematic diagram of the material distribution mechanism in the high-safety lithium battery assembly device of the utility model;

[0033] Figure 4 It is a high-safety lithium battery pack assembly device of the utility model. Figure 3 Schematic diagram of the local structure;

[0034] Figure 5 It is a structural schematic diagram of a driving component in a high-safety lithium battery pack assembly device of the utility model.

[0035] In the figure: 1. conveyor belt; 2. protection plate; 21. protection baffle; 3. support vertical plate; 4. mounting plate; 41. slide groove; 51. first dividing plate; 52. second dividing plate; 61. first connecting plate; 62. second connecting plate; 7. slider; 81. electric telescopic shaft; 811. mounting seat; 82. connecting piece; 83. rotating seat; 831. first connecting seat; 832. second connecting seat; 833. third connecting seat; 84. supporting shaft. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, purpose and efficacy of the utility model easy to understand, the utility model is further described below in conjunction with the specific implementation methods. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The utility model provides a technical solution: a high-safety lithium battery pack assembly device, comprising a conveyor belt 1, protective plates 2 respectively arranged on both sides of the conveyor belt 1, and protective baffles 21 fixedly arranged on the upper end surfaces of the protective plates 2 on each side. The protective plates 2 are arranged in the length direction of the conveyor belt 1, so that it is convenient to protect both sides of the lithium battery shell during the conveying process through the protective plates 2. One end of the protective baffle 21 is arranged at the same horizontal plane as the feeding end of the conveyor belt 1, and the other end of the protective baffle 21 is arranged relative to the discharging end of the conveyor belt 1. This design avoids the position interference of the dividing mechanism with the protective baffle 21 when the lithium battery body at the discharging end is diverted.

[0038] Please refer to Figure 1 , Figure 2 and Figure 3, a support upright plate 3 fixedly arranged at the discharge end of the conveyor belt 1, a mounting plate 4 fixedly arranged on the inner side of the support upright plate 3, and a material dividing mechanism arranged between the support upright plate 3 and the mounting plate 4, the material dividing mechanism includes a first material dividing plate 51, a second material dividing plate 52 arranged opposite to the first material dividing plate 51, a first connecting plate 61 connected to the upper end surface of the first material dividing plate 51, a second connecting plate 62 connected to the upper end surface of the second material dividing plate 52, and a driving component for driving the first connecting plate 61 and the second connecting plate 62, the first material dividing plate 51 and the second material dividing plate 52 are arranged in sequence in the discharge direction of the lithium battery shell, In order to facilitate the purpose of diverting the discharge and blocking of the lithium battery shell during the conveying process through the first dividing plate 51 and the second dividing plate 52, the first dividing plate 51 and the first connecting plate 61 as well as the second dividing plate 52 and the second connecting plate 62 are respectively connected by fixing screws, and the fixing screws pass through the first connecting plate 61 and the second connecting plate 62 and connect the first dividing plate 51 and the second dividing plate 52, thereby effectively ensuring the stability of the connection between the first dividing plate 51 and the first connecting plate 61 as well as the second dividing plate 52 and the second connecting plate 62, and facilitating the quick disassembly and assembly of the first dividing plate 51 and the second dividing plate 52.

[0039] Please refer to Figure 3 and Figure 4 In order to facilitate the first dividing plate 51 and the second dividing plate 52 to divide the lithium battery shell, the first dividing plate 51 and the second dividing plate 52 are respectively provided with buffer pads at one end away from the first connecting plate 61 and the second connecting plate 62. The buffer pads are connected to the first dividing plate 51 and the second dividing plate 52 by polymer bonding, and the inclination of the buffer pads decreases in sequence in the direction away from the first dividing plate 51 and the second dividing plate 52. The design of the buffer pads avoids damage to the lithium battery shell when the first dividing plate 51 and the second dividing plate 52 come into contact with the lithium battery shell, thereby effectively improving the yield rate of lithium battery assembly.

[0040] Please refer to Figure 4 and Figure 5The driving assembly includes a support shaft 84 fixedly arranged between the supporting vertical plate 3 and the mounting plate 4, a rotating seat 83 rotatably connected to the support shaft 84, a first connecting seat 831 fixedly arranged on one side of the rotating seat 83, a second connecting seat 832 fixedly arranged on the other side of the rotating seat 83, a third connecting seat 833 fixedly arranged on the upper end surface of the rotating seat 83, a connecting piece 82 connected to the third connecting seat 833, an electric telescopic shaft 81 connected to the other end of the connecting piece 82, and a mounting seat 811 for fixing the electric telescopic shaft 81 and fixedly connected to the supporting vertical plate 3. A shaft sleeve is provided at the connection between the rotating seat 83 and the support shaft 84, and the shaft sleeve is rotatably connected to the support shaft 84. The shaft sleeve is connected to the rotating seat 83 through a spline, and the rotating seat 83 is convenient for rotating around the support shaft 84 as the central axis. The first connecting seat 831 is connected to one end of the first connecting plate 61 away from the first material dividing plate 51, and the second connecting seat 832 is connected to one end of the second connecting plate 62 away from the second material dividing plate 52 The ends are connected, and a connecting pin is provided at the connection between the first connecting seat 831 and the first connecting plate 61, and a connecting pin is provided at the connection between the second connecting seat 832 and the second connecting plate 62, so as to facilitate the connection of the first connecting seat 831 and the first connecting plate 61 through the connecting pin, and the second connecting seat 832 and the second connecting plate 62 are connected, the extended end of the electric telescopic shaft 81 is fixedly connected to the connecting piece 82, and the end of the connecting piece 82 away from the extended end is also connected to the third connecting seat 833 through the connecting pin, so as to facilitate the linear movement of the extended end of the electric telescopic shaft 81, and drive the rotating seat 83 to rotate around the support shaft 84 as the center axis, so as to facilitate the first connecting plate 61 and the second connecting plate 62 to reciprocate up and down, and facilitate the first material dividing plate 51 and the second material dividing plate 52 to reciprocate up and down, so as to facilitate the first material dividing plate 51 and the second material dividing plate 52 to achieve the purpose of discharging and blocking the lithium battery shell during the conveying process through the first material dividing plate 51 and the second material dividing plate 52.

[0041] Please refer to Figure 3 In order to guide the first connecting plate 61 and the second connecting plate 62 during the movement, it also includes a slider 7 fixedly arranged on the outer sides of the first connecting plate 61 and the second connecting plate 62 and a slide groove 41 arranged on the inner side of the mounting plate 4. The slider 7 and the slide groove 41 cooperate with each other to facilitate guiding the first connecting plate 61 and the second connecting plate 62 during the up and down movement, thereby effectively ensuring the stability of the first connecting plate 61 and the second connecting plate 62 during movement.

[0042] Working principle: the conveyor belt 1 conveys the lithium battery shell, and protects both sides of the lithium battery during the conveying process through the protective plate 2, and the protective baffle 21 protects the upper end surface of the lithium battery. When the protruding end of the electric telescopic shaft 81 is extended, it drives the rotating seat 83 to rotate counterclockwise with the support as the central axis, so that the first connecting seat 831 moves away from the conveyor belt 1, and the second connecting seat 832 moves relative to the conveyor belt 1. The first connecting seat 831 drives the first connecting plate 61 to move away from the conveyor belt 1, and the second connecting seat 832 drives the second connecting plate 62 to move relative to the conveyor belt 1, so that the first dividing plate 51 moves up, the second dividing plate 52 moves down, and the lithium battery shell enters the first Between the dividing plate 51 and the second dividing plate 52, and then when the protruding end of the electric telescopic shaft 81 is retracted, it drives the rotating seat 83 to rotate clockwise with the support as the central axis, so that the first connecting seat 831 moves in the direction relative to the conveyor belt 1, and the second connecting seat 832 moves away from the conveyor belt 1. The first connecting seat 831 drives the first connecting plate 61 to move in the direction relative to the conveyor belt 1, and the second connecting seat 832 drives the second connecting plate 62 to move away from the conveyor belt 1, thereby causing the first dividing plate 51 to move downward and the second dividing plate 52 to move upward. The lithium battery shell that enters between the first dividing plate 51 and the second dividing plate 52 falls along the direction of the discharge end of the conveyor belt 1 and enters the operation process of assembly with the inner core.

[0043] The device obtained by the above design can basically meet the needs of improving the current lithium battery assembly equipment. Due to its own design characteristics, it is not convenient to separate the shells in the conveying mechanism, which easily causes the shells to accumulate at the discharge end of the conveying mechanism, thereby reducing the efficiency of assembling the shells and the inner core. However, in order to further improve its functions, the designer has further improved the device.

[0044] All kinds of components used in this application document are standard parts and can be purchased on the market. The specific connection methods of each part adopt conventional means such as mature bolts, rivets and welding in the existing technology. Machinery, parts and electrical equipment all adopt conventional models in the existing technology. The equipment appearing in this document is powered by 380V voltage, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0045] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A high-safety lithium battery assembly device, characterized in that: The invention comprises a conveyor belt (1), protective plates (2) respectively arranged on both sides of the conveyor belt (1), protective baffles (21) fixedly arranged on the upper end surfaces of the protective plates (2) on each side, a supporting upright plate (3) fixedly arranged at the discharge end of the conveyor belt (1), a mounting plate (4) fixedly arranged on the inner side of the supporting upright plate (3), and a material distribution mechanism arranged between the supporting upright plate (3) and the mounting plate (4).

2. A high-safety lithium battery assembly device according to claim 1, characterized in that: The protective plate (2) is arranged in the length direction of the conveyor belt (1), one end of the protective baffle (21) is arranged at the same horizontal plane as the feed end of the conveyor belt (1), and the other end of the protective baffle (21) is arranged relative to the discharge end of the conveyor belt (1).

3. A high-safety lithium battery assembly device according to claim 2, characterized in that: The material dividing mechanism comprises a first material dividing plate (51), a second material dividing plate (52) arranged opposite to the first material dividing plate (51), a first connecting plate (61) connected to the upper end surface of the first material dividing plate (51), a second connecting plate (62) connected to the upper end surface of the second material dividing plate (52), and a driving component for driving the first connecting plate (61) and the second connecting plate (62); the first material dividing plate (51) and the second material dividing plate (52) are arranged in sequence in the discharge direction of the lithium battery shell, respectively; the first material dividing plate (51) and the first connecting plate (61) as well as the second material dividing plate (52) and the second connecting plate (62) are respectively connected by fixing screws.

4. A high-safety lithium battery assembly device according to claim 3, characterized in that: Buffer pads are respectively provided at one end of the first material dividing plate (51) and the second material dividing plate (52) which is away from the first connecting plate (61) and the second connecting plate (62), and the buffer pads are connected to the first material dividing plate (51) and the second material dividing plate (52) by polymer bonding, and the inclination of the buffer pads decreases in sequence in the direction away from the first material dividing plate (51) and the second material dividing plate (52).

5. A high-safety lithium battery assembly device according to claim 4, characterized in that: The driving assembly comprises a support shaft (84) fixedly arranged between the support vertical plate (3) and the mounting plate (4), a rotating seat (83) rotatably connected to the support shaft (84), a first connecting seat (831) fixedly arranged on one side of the rotating seat (83), a second connecting seat (832) fixedly arranged on the other side of the rotating seat (83), a third connecting seat (833) fixedly arranged on the upper end surface of the rotating seat (83), a connecting member (82) connected to the third connecting seat (833), an electric telescopic shaft (81) connected to the other end of the connecting member (82), and a mounting seat (811) for fixing the electric telescopic shaft (81) and fixedly connected to the support vertical plate (3), a shaft sleeve is provided at the connection between the rotating seat (83) and the support shaft (84), the shaft sleeve is rotatably connected to the support shaft (84), and the shaft sleeve is connected to the rotating seat (83) through a spline.

6. A high-safety lithium battery assembly device according to claim 5, characterized in that: The first connecting seat (831) is connected to one end of the first connecting plate (61) away from the first material dividing plate (51), and the second connecting seat (832) is connected to one end of the second connecting plate (62) away from the second material dividing plate (52), and a connecting pin is provided at the connection between the first connecting seat (831) and the first connecting plate (61), and a connecting pin is provided at the connection between the second connecting seat (832) and the second connecting plate (62).

7. A high-safety lithium battery assembly device according to claim 6, characterized in that: It also includes a sliding block (7) fixedly arranged on the outer sides of the first connecting plate (61) and the second connecting plate (62), and a sliding groove (41) arranged on the inner side of the mounting plate (4) and adapted to the sliding block (7).

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