Battery dismounting device for new energy automobile

Abstract

The invention relates to the technical field of new energy automobiles, in particular to a new energy automobile battery dismounting device which comprises a telescopic column, the length of the telescopic column is adjustable to adapt to the length of a battery, the telescopic column comprises a hollow column and a sliding column, the sliding column slides in the hollow column, and the end, away from the hollow column, of the sliding column is rotationally connected with a handle with a rotating shaft as the axis. Side plates are connected to the end, away from the sliding column, of the hollow column and the end, close to the rotating shaft, of the handle, two through channels are formed in the lower portion of each side plate, sliding protruding rods are arranged in the channels, and clamping blocks are connected to the ends of the protruding rods. After the side plates move to the two sides of the battery and the clamping blocks are aligned with the first through holes, the clamping blocks are clamped into the first through holes under the action of the first elastic pieces, the handle is pulled independently, the handle, the side plate on the right side and the clamping blocks on the right side rotate clockwise around the rotating shaft at a micro angle, fine adjustment of the positions of the clamping blocks is achieved, it is guaranteed that the clamping blocks clamp the battery, and the clamping blocks are prevented from being disengaged from the battery; the battery dismounting process is more convenient and safer, and the practicability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a battery disassembly device for new energy vehicles. Background Art

[0002] New energy vehicles include pure electric vehicles, hybrid vehicles and fuel cell electric vehicles. New energy vehicles use batteries to provide power. When the battery fails, reaches the replacement cycle or undergoes major repairs, the battery needs to be disassembled.

[0003] In the process of disassembling the battery of a new energy vehicle, it is necessary to manually use tools to pry out the battery. However, the battery has a certain weight. When one side of the battery is pried out, the other side of the battery is still embedded in the car. The tool often separates from the battery, resulting in the need to pry out the battery multiple times, which increases the battery disassembly time, makes disassembly inconvenient, and increases the risk of battery rupture and leakage. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, an object of the present invention is to provide a convenient and safe battery disassembly device for new energy vehicles.

[0005] The technical solution of the present invention is: a battery disassembly device for new energy vehicles, including a telescopic column, the length of the telescopic column is adjustable to adapt to the length of the battery, the telescopic column includes a hollow column and a sliding column, the sliding column slides in the hollow column, the end of the sliding column away from the hollow column is rotatably connected to a handle with a rotating shaft as the axis, the end of the hollow column away from the sliding column and the end of the handle close to the rotating shaft are both connected to side plates, two through channels are opened at the lower part of the side plates, sliding convex rods are provided in the channels, the ends of the convex rods are connected to card blocks, the bottom surfaces of the card blocks are provided with inclined surfaces, and an elastic member is provided between the card block and the side plate; when the handle is lifted, the handle and the side plate on the handle will rotate with the rotating shaft as the axis so that the card block is clamped in a through hole of the battery.

[0006] In one of the embodiments, a row of circular grooves is opened on the front side of the sliding column, and a limiting member is threadedly connected to the hollow column, and one end of the limiting member extends into one of the circular grooves.

[0007] In one of the embodiments, a limit plate is connected to the handle, and the bottom of the limit plate contacts the top of the hollow column to limit the rotation direction of the handle.

[0008] In one of the embodiments, the battery disassembly device for new energy vehicles also includes a supporting mechanism, which includes a fixed column, and the front and rear sides of the side panels are connected to the fixed columns, and the fixed columns are provided with lifting blocks that slide up and down, and the lifting blocks are reset by elastic member 2, and the lower part of the lifting blocks is slidably provided with a sliding rod that is reset by elastic member 3, and the end of the sliding rod close to the battery is connected to a supporting block, and the supporting block is used to support the bottom of the battery, and the bottom surface of the supporting block is provided with inclined surface 2, and the top surface of the supporting block is stepped.

[0009] In one of the embodiments, the battery disassembly device for new energy vehicles also includes an extrusion mechanism, which includes a linear drive. The linear drives are installed on the sides of the two side panels that are away from each other. The linear drives are provided with lifting plates, and the lifting plates are connected to two pairs of spaced-apart extrusion blocks. The ends of the protruding rods are respectively located between each pair of extrusion blocks, and the ends of the protruding rods away from the clamping blocks are connected to connecting caps.

[0010] In one embodiment, a slope five is provided on the upper part of the extrusion block, and the diameter of the connecting cap is larger than the interval between each pair of extrusion blocks; when the lifting plate and the extrusion block descend, the slope five will squeeze the connecting cap to move the connecting cap, the protruding rod and the clamping block.

[0011] In one of the embodiments, the end of the sliding rod away from the battery is connected to a connecting block, the top of the connecting block is provided with a slope three, and the bottom of the lifting plate is provided with a slope four; when the lifting plate descends, the slope four of the lifting plate will squeeze the slope three to move the connecting block, the sliding rod and the supporting block.

[0012] In one of the embodiments, the battery disassembly device for new energy vehicles also includes a mounting block, each of the side panels is connected to the mounting block, each of the mounting blocks is slidably connected to two sliding blocks, each of the sliding blocks is connected to a positioning rod for extending into through hole 2, each of the sliding blocks has a slotted hole, and each of the mounting blocks is threadedly connected to two limit members 2 located in the slotted hole, and the top of the limit member 2 is in close contact with the top surface of the sliding block.

[0013] The beneficial effects are: 1. After the side panels are moved to both sides of the battery and the card blocks are aligned with the through hole 1, the card blocks are all inserted into the through hole 1 under the action of the elastic member 1. The handle is pulled separately, and the handle, the side panel on the right side and the card blocks on the right side are rotated clockwise around the rotating shaft at a slight angle to achieve fine-tuning of the card block position, ensuring that the card blocks clamp the battery and prevent the card blocks from detaching from the battery. The battery disassembly process is more convenient and safer, and is highly practical.

[0014] 2. The bottom of the limit plate contacts the top surface of the sliding column, which can keep the two side panels in a vertical state, making it convenient for the side panels to extend into the gap on the side of the battery. It can also prevent the handle and the right side panel from rotating counterclockwise, preventing the block on the right side panel from detaching from the battery, which is safer.

[0015] 3. The bottom surface of the battery is supported by the support block, making the battery removal process more stable and safer. The lifting plate and the extrusion block are driven down by the linear drive. Inclined surface 4 first squeezes inclined surface 3 so that the support block no longer supports the battery and the battery is placed on the ground. Elastic component 2 can avoid battery damage and play a protective role. Inclined surface 5 then squeezes the connecting cap so that the card block automatically leaves through hole 1, saving time and effort.

[0016] 4. Insert the positioning rod into the second through hole for positioning, so as to facilitate the vertical alignment of the block and the first through hole and improve the disassembly efficiency; the distance between the two positioning rods can be adjusted by the second limiter to adapt to the position of the second battery through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the working state of the present invention.

[0018] Figure 2 A schematic diagram of the battery structure.

[0019] Figure 3 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 4 For the present invention Figure 3 Schematic diagram of some structures in .

[0021] Figure 5 It is a schematic structural diagram of the sliding column, rotating shaft, handle, limit plate, side plate and clamping block of the present invention, wherein the side plate is cut away.

[0022] Figure 6 It is a front view of the side plate, the protruding rod, the clamping block and the elastic member of the present invention, wherein the side plate is cut away.

[0023] Figure 7 For the present invention Figure 3 Schematic diagram of the local structure in.

[0024] Figure 8 It is a schematic structural diagram of the second elastic member, the fixing column, the lifting block, the sliding rod, the supporting block and the connecting block of the present invention.

[0025] Fig. 9 The figure is a schematic diagram of the connection relationship among the lifting block, the sliding rod, the elastic member 3, the supporting block and the connecting block of the present invention.

[0026] Fig.10 It is a schematic diagram of the structure of the linear drive, lifting plate and extrusion block of the present invention.

[0027] Fig.11 It is a schematic diagram of the matching relationship among the extrusion block, the convex rod and the connecting cap of the present invention.

[0028] Fig.12It is a schematic diagram of the connection relationship between the mounting block, the sliding block, the positioning rod and the second limiting member of the present invention, wherein the sliding block is cut away.

[0029] In the accompanying drawings: 1-telescopic column, 2-hollow column, 3-sliding column, 31-limiting member 1, 32-circular groove, 4-rotating shaft, 5-handle, 51-limiting plate, 6-side plate, 60-channel, 7-convex rod, 71-connecting cap, 8-block, 80-inclined surface 1, 9-elastic member 1, 10-battery, 100-through hole 1, 101-through hole 2, 110-elastic member 2, 111-fixing column, 112 -lifting block, 113-sliding rod, 114-elastic part three, 115-support block, 1151-inclined surface two, 116-connecting block, 1161-inclined surface three, 121-linear drive, 122-lifting plate, 1221-inclined surface four, 123-extrusion block, 1231-inclined surface five, 130-mounting block, 131-sliding block, 132-positioning rod, 133-limiting part two, 134-slotted hole. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] Embodiment 1: A battery disassembly device for new energy vehicles, referring to Figure 1-Figure 6 , including a telescopic column 1, a rotating shaft 4, a handle 5, a side plate 6, a protruding rod 7, a block 8 and an elastic member 9, a pair of through holes 100 are opened on both sides of the battery 10, the length of the telescopic column 1 is adjustable to adapt to the length of the battery 10, the telescopic column 1 includes a hollow column 2 and a sliding column 3, the sliding column 3 slides in the hollow column 2, a row of circular grooves 32 are opened on the front side of the sliding column 3, the hollow column 2 is threadedly connected to a limiting member 31, and the end of the limiting member 31 extends into one of the circular grooves 32; the right end of the sliding column 3 is rotatably connected with a rotating shaft 4 as the axis The handle 5, the left end of the hollow column 2 and the right end of the handle 5 are fixedly connected to the side plate 6, the lower part of the side plate 6 is provided with two left and right through channels 60, the channels 60 are provided with convex rods 7 that slide left and right, the ends of the convex rods 7 are fixedly connected to the clamping blocks 8, the bottom surfaces of the clamping blocks 8 are provided with inclined surfaces 80, and an elastic member 9 is fixedly connected between the clamping blocks 8 and the side plate 6, and the elastic member 9 is a spring; when the handle 5 is lifted, the handle 5 and the side plate 6 on the handle 5 will rotate around the rotating shaft 4 so that the clamping block 8 is clamped in the through hole 100 of the battery 10.

[0032] First, manually hold the telescopic column 1 and the handle 5 to move the device, so that the two side panels 6 move from top to bottom to the left and right sides of the battery 10, and the block 8 will contact the side of the battery 10. The battery 10 squeezes the inclined surface 80 of the block 8, so that the block 8 and the protruding rod 7 move away from the battery 10, and the block 8 retracts into the channel 60, and the elastic member 9 deforms; when the block 8 is aligned with the through hole 100 of the battery 10, the elastic member 9 recovers, driving the block 8 and the protruding rod 7 to move toward the direction of the battery 10 and reset, and the four blocks 8 are all stuck in the through hole 100; then manually hold the handle 5 alone and pull it upward to drive the entire device to move upward, and the four blocks 8 drive the battery 10 to move upward together. Since the handle 5 is pulled alone, the handle 5 will rotate clockwise at a slight angle relative to the telescopic column 1 with the rotating shaft 4 as the axis under the action of gravity, driving the side panel 6 on the right side. The two clamping blocks 8 on the right side rotate clockwise around the rotating shaft 4 at a slight angle, so that the clamping block 8 can be completely clamped into the through hole 100, so as to achieve fine adjustment of the position of the clamping block 8, ensure that the clamping block 8 clamps the battery 10, and prevent the clamping block 8 from being separated from the battery 10. At this time, the handle 5 can be pulled to remove the battery 10 from the interior of the car; after the battery 10 is placed on the ground, the telescopic column 1 and the handle 5 are manually pressed to move the side plate 6 and the clamping block 8 downward relative to the battery 10, and the battery 10 squeezes the inclined surface 80 of the clamping block 8 to move the clamping block 8 and the protruding rod 7, and the clamping block 8 retracts into the channel 60, and the elastic member 9 is deformed, and then the whole device is moved to make the clamping block 8 deviate from the position of the through hole 100 in the vertical direction, and then the handle 5 can be pulled to make the side plate 6 leave the left and right sides of the battery 10, so that the battery 10 can be put down, and the disassembly process of the battery 10 is more convenient and safe, and has high practicality.

[0033] When it is necessary to disassemble batteries 10 of different lengths, the limit piece 31 is rotated manually using a tool. The limit piece 31 moves forward under the action of the threaded connection, and the limit piece 31 leaves the circular groove 32, so that the slide column 3 can be pulled to slide left or right relative to the hollow column 2 to adjust the distance between the two side plates 6. Then the limit piece 31 is reversed, and the limit piece 31 moves backward to reset. The limit piece 31 is stuck in another circular groove 32, thereby limiting the relative position between the hollow column 2 and the slide column 3, so as to adjust the length of the telescopic column 1, so that the distance between the two side plates 6 can adapt to the length of the battery 10, and batteries 10 of different lengths can be disassembled, and the adaptability is higher.

[0034] Example 2: Based on Example 1, refer to Figure 3-Figure 5 A limit plate 51 is fixedly connected to the handle 5 , and the bottom of the limit plate 51 contacts the top of the hollow column 2 to limit the rotation direction of the handle 5 .

[0035] When the two side panels 6 need to be moved from top to bottom to the left and right sides of the battery 10, by pressing the handle 5, the bottom of the limit plate 51 contacts the top surface of the slide column 3, which can prevent the handle 5 from rotating counterclockwise around the rotating shaft 4, thereby keeping the two side panels 6 in a vertical state, making it convenient for the side panels 6 to extend into the gap on the side of the battery 10; after the battery 10 is removed from the interior of the car, the handle 5 and the right side panel 6 can also be prevented from rotating counterclockwise, preventing the block 8 on the right side panel 6 from detaching from the battery 10, which is safer.

[0036] Embodiment 3: Based on Embodiment 2, refer to Figure 1 , Figure 3 , Figure 7 , Figure 8 and Fig. 9 The battery disassembly device for new energy vehicles also includes a supporting mechanism, which includes an elastic member 110, a fixed column 111, a lifting block 112, a slide bar 113, an elastic member 114 and a support block 115. The front and rear sides of the side plate 6 are fixedly connected with fixed columns 111, and the fixed columns 111 are provided with lifting blocks 112 that slide up and down. The elastic member 110 is fixedly connected between the lifting block 112 and the fixed column 111. The lower part of the lifting block 112 is provided with a slide bar 113 that slides left and right. The elastic member 114 is fixedly connected between the slide bar 113 and the lifting block 112. In this embodiment, the elastic member 110 and the elastic member 114 are specifically springs, which play a role in resetting; the end of the slide bar 113 close to the battery 10 is fixedly connected with a support block 115, and the support block 115 is used to support the bottom of the battery 10; refer to Fig. 9 The bottom surfaces of the support blocks 115 are all provided with inclined surfaces 1151, and the top surfaces of the support blocks 115 are all in a stepped shape.

[0037] refer to Figure 1 , Figure 3 , Figure 7 , Fig.10 and Fig.11The battery disassembly device for new energy vehicles also includes an extrusion mechanism, which includes a linear drive 121, a lifting plate 122 and an extrusion block 123. The linear drive 121 is installed on the side of the two side plates 6 that are away from each other. The linear drive 121 is provided with a lifting plate 122 that moves up and down. The linear drive 121 is a prior art. The lifting plate 122 is driven to move linearly by the linear drive 121. In this embodiment, the linear drive 121 is specifically an electric slide rail. Two pairs of spaced extrusion blocks 123 are fixedly connected to the lifting plate 122. The ends of the protruding rod 7 are respectively located between each pair of extrusion blocks 123, and the ends of the protruding rod 7 away from the block 8 are connected to the connecting cap 7 1; The upper part of the extrusion block 123 is provided with a bevel 5 1231, and the diameter of the connection cap 71 is larger than the interval between each pair of extrusion blocks 123; when the lifting plate 122 and the extrusion block 123 descend, the bevel 5 1231 of the extrusion block 123 will squeeze the connection cap 71, so that the connection cap 71, the protruding rod 7 and the block 8 move; the end of the slide bar 113 away from the battery 10 is connected to the connection block 116, the top of the connection block 116 is provided with a bevel 3 1161, and the bottom of the lifting plate 122 is provided with a bevel 4 1221; when the lifting plate 122 descends, the bevel 4 1221 of the lifting plate 122 will squeeze the bevel 3 1161, so that the connection block 116, the slide bar 113 and the support block 115 move.

[0038] When the two side plates 6 move from top to bottom to the left and right sides of the battery 10, the fixing column 111, the lifting block 112 and the supporting block 115 will also move together, and the supporting block 115 will contact the side of the battery 10. The battery 10 squeezes the inclined surface 2 1151 of the supporting block 115, so that the supporting block 115, the sliding rod 113 and the connecting block 116 move away from the battery 10, and the elastic member 3 114 is deformed. When the supporting block 115 leaves the side of the battery 10, the elastic member 3 114 recovers, driving the supporting block 115, the sliding rod 113 and the connecting block 116 to move towards the battery 10. Since the top surface of the supporting block 115 is stepped, the supporting block 115 can smoothly support the bottom surface of the battery 10, making the battery 10 more stable and safer during disassembly.

[0039] After the battery 10 is removed from the interior of the car, the device and the battery 10 are moved so that the lifting block 112 is located on the ground, and the linear drive 121 is controlled to drive the lifting plate 122 and the extrusion block 123 to descend. The inclined surface 4 1221 of the lifting plate 122 first squeezes the inclined surface 3 1161, so that the connecting block 116, the slide bar 113 and the support block 115 move away from the battery 10, and the elastic member 3 114 is deformed, and the support block 115 is separated from the bottom surface of the battery 10. The support block 115 no longer supports the battery 10. Since the lifting block 112 is located on the ground, under the action of gravity, the side plate 6, the fixing column 111, The card block 8 and the battery 10 will move downward relative to the lifting block 112, the elastic member 110 will be deformed, and the battery 10 will be placed on the ground. The elastic member 110 can slow down the falling speed of the battery 10 to avoid damage to the battery 10 and play a protective role. At this time, the linear drive 121 drives the lifting plate 122 and the extrusion block 123 to continue to descend, and the inclined surface 1231 of the extrusion block 123 squeezes the connecting cap 71, so that the connecting cap 71, the protruding rod 7 and the card block 8 move away from the battery 10. There is no need to manually press the handle 5 to make the card block 8 automatically leave the through hole 100, which saves time and effort.

[0040] Embodiment 4: Based on Embodiment 3, refer to Figure 1 , Figure 3 and Fig.12 The battery disassembly device for new energy vehicles also includes a mounting block 130, a sliding block 131, a positioning rod 132 and a second limiting member 133. A pair of through holes 101 are opened on the left and right parts of the battery 10. The upper part of the side plate 6 is fixedly connected with a mounting block 130. Two symmetrical sliding blocks 131 are slidably connected to the mounting block 130. The sliding blocks 131 are fixedly connected with positioning rods 132 for extending into the second through holes 101. The sliding blocks 131 are opened with a straight hole 134. The mounting blocks 130 are threadedly connected with two second limiting members 133 located in the straight hole 134. The top of the second limiting member 133 is in close contact with the top surface of the sliding block 131.

[0041] When it is necessary to move the device so that the two side panels 6 move from top to bottom to the left and right sides of the battery 10, the positioning rod 132 is inserted into the second through hole 101 for positioning, so that the block 8 and the first through hole 100 are aligned in the vertical direction, thereby improving the disassembly efficiency; by manually rotating the second limit member 133, the second limit member 133 moves upward under the action of the threaded connection, and the second limit member 133 is no longer in close contact with the top surface of the sliding block 131, so that the sliding block 131 can be pushed to move in the front and rear directions relative to the mounting block 130, driving the positioning rod 132 to move, so as to adjust the distance between the two positioning rods 132, so that the position of the positioning rod 132 can adapt to the position of the second through hole 101 of the battery 10, and then reverse the second limit member 133, the second limit member 133 moves downward, and the second limit member 133 is in close contact with the top surface of the sliding block 131, thereby limiting the relative position of the sliding block 131 and the mounting block 130.

[0042] Although the present invention is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through this disclosure that various changes or modifications may be made to the present invention without departing from the principle and spirit of the present invention defined by the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, not to limit the present invention, but the scope of protection is limited by the content of the claims.

Claims

1. A battery disassembly device for a new energy vehicle, comprising a telescopic column (1), characterized in that: The length of the telescopic column (1) is adjustable to adapt to the length of the battery (10). The telescopic column (1) comprises a hollow column (2) and a sliding column (3). The sliding column (3) slides in the hollow column (2). The end of the sliding column (3) away from the hollow column (2) is rotatably connected to a handle (5) with a rotating shaft (4) as an axis. The end of the hollow column (2) away from the sliding column (3) and the end of the handle (5) close to the rotating shaft (4) are both connected to a side plate (6). The lower part of the side plate (6) is provided with Two through-going channels (60), each of which is provided with a sliding protruding rod (7), each end of each of which is connected to a clamping block (8), each bottom surface of each of which is provided with an inclined surface (80), and an elastic member (9) is provided between each of the clamping block (8) and the side plate (6); when the handle (5) is lifted, the handle (5) and the side plate (6) on the handle (5) rotate about the rotating shaft (4) so ​​that the clamping block (8) is clamped in a through hole (100) of the battery (10).

2. A battery disassembly device for new energy vehicles as claimed in claim 1, characterized in that: A row of circular grooves (32) is formed on the front side of the sliding column (3), and a limiting member (31) is threadedly connected to the hollow column (2), with an end of the limiting member (31) extending into one of the circular grooves (32).

3. A battery disassembly device for new energy vehicles as claimed in claim 2, characterized in that: The handle (5) is connected to a limit plate (51), and the bottom of the limit plate (51) contacts the top of the hollow column (2) to limit the rotation direction of the handle (5).

4. A battery disassembly device for new energy vehicles as claimed in claim 3, characterized in that: The battery disassembly device for a new energy vehicle further comprises a supporting mechanism, the supporting mechanism comprising a fixed column (111), the front and rear sides of the side plate (6) are both connected to the fixed column (111), the fixed column (111) is provided with a lifting block (112) that slides up and down, the lifting block (112) is reset by a second elastic member (110), the lower part of the lifting block (112) is slidably provided with a slide bar (113) that is reset by a third elastic member (114), the end of the slide bar (113) close to the battery (10) is connected to a support block (115), the support block (115) is used to support the bottom of the battery (10), the bottom surface of the support block (115) is provided with a second inclined surface (1151), and the top surface of the support block (115) is stepped.

5. A battery disassembly device for new energy vehicles as claimed in claim 4, characterized in that: The battery disassembly device for a new energy vehicle further comprises an extrusion mechanism, the extrusion mechanism comprising a linear drive (121), the linear drive (121) being installed on the sides of the two side plates (6) that are away from each other, the linear drive (121) being provided with a lifting plate (122), the lifting plate (122) being connected to two pairs of extrusion blocks (123) that are spaced apart, the ends of the protruding rods (7) being respectively located between each pair of extrusion blocks (123), and the ends of the protruding rods (7) that are away from the clamping block (8) being connected to a connection cap (71).

6. A battery disassembly device for new energy vehicles as claimed in claim 5, characterized in that: The extrusion blocks (123) are each provided with an inclined surface five (1231) on their upper parts, and the diameter of the connection cap (71) is larger than the interval between each pair of extrusion blocks (123); when the lifting plate (122) and the extrusion blocks (123) are lowered, the inclined surface five (1231) will squeeze the connection cap (71) to move the connection cap (71), the protruding rod (7) and the clamping block (8).

7. A battery disassembly device for new energy vehicles as claimed in claim 6, characterized in that: The ends of the slide bars (113) away from the batteries (10) are connected to the connection blocks (116); the tops of the connection blocks (116) are provided with inclined planes 3 (1161); the bottoms of the lifting plates (122) are provided with inclined planes 4 (1221); when the lifting plates (122) descend, inclined planes 4 (1221) of the lifting plates (122) press inclined planes 3 (1161) to move the connection blocks (116), the slide bars (113) and the support blocks (115).

8. A battery disassembly device for new energy vehicles as claimed in claim 7, characterized in that: The battery disassembly device for a new energy vehicle also includes a mounting block (130), the side plates (6) are each connected to the mounting block (130), the mounting block (130) is each slidably connected to two sliding blocks (131), the sliding blocks (131) are each connected to a positioning rod (132) for extending into the second through hole (101), the sliding blocks (131) are each provided with a slotted hole (134), the mounting blocks (130) are each threadedly connected to two second limiting members (133) located in the slotted holes (134), and the top end of the second limiting member (133) is in close contact with the top surface of the sliding block (131).

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