A quick-connect device for liquid cooling pipes of new energy vehicles

Abstract

The present invention relates to the technical field of liquid cooling pipe connection, and particularly to a quick installation connection device for liquid cooling pipes of new energy vehicles. The present invention provides such a quick installation connection device for liquid cooling pipes of new energy vehicles, which includes a first connection pipe, a second connection pipe, a sliding pipe, a support pipe and a fixed pipe. The first connection pipe and the second connection pipe are symmetrically distributed, and the first connection pipe and the second connection pipe are engaged and clamped. The sliding pipe is slidably connected to the outside of the first connection pipe, the support pipe is connected to the outside of the second connection pipe, and the fixed pipe is connected to the outside of the support pipe. The two liquid cooling pipes are respectively connected to the second connection pipe and the first connection pipe. By docking the second connection pipe and the first connection pipe, the arc surface on the fixed pipe can automatically push the convex block to rotate with the annular part, so that the convex block is engaged with the card slot, and the sliding pipe and the fixed pipe are fixed to each other, completing the connection of the two liquid cooling pipes. The operation is simple and fast, and there is no need to adjust the position and angle of the docking of the fixed pipe and the sliding pipe during the operation.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid cooling pipe connection, and particularly to a quick-installation connection device for liquid cooling pipes of new energy vehicles. Background Art

[0002] In the heat dissipation technology of new energy vehicle technology, the cooling system is particularly crucial. Liquid cooling is the main cooling method for current new energy vehicles. The coolant pipeline is an important component of new energy vehicles. The liquid cooling pipeline is mainly used to transfer heat from the motor to the cooling equipment. It usually consists of pipes, pumps, radiators, and coolants. When using the liquid cooling pipe, it is necessary to connect the lengths of the liquid cooling pipes according to the actual situation, and it is often necessary to connect two liquid cooling pipes.

[0003] The patent with the publication number CN117345966A discloses a quick connection device for a new energy battery cooling pipeline, including a cooling pipe body. Both ends of the cooling pipe body are fixed with first connection sleeves. A quick connection mechanism is provided at one end of the first connection sleeve away from the cooling pipe body. A protective ring is fixedly sleeved on the outer surface of the cooling pipe body. A coolant filtering mechanism is provided on the upper surface of the upper first connection sleeve. In this quick connection device for a new energy battery cooling pipeline, a quick connection mechanism is provided. Through the mutual cooperation among the structures in the quick connection mechanism, by setting the first flange, sealing gasket, second flange, fastening bolts, fastening nuts, second connection sleeve, joint sleeve, internal thread, external thread, and first sealing ring, the quick replacement of the cooling pipeline joint is realized, and at the same time, the sealing performance at the connection of the cooling pipeline is improved. Only by rotating the joint sleeve can the sealing connection be completed, which is convenient for the maintenance process.

[0004] The joint sleeve in the above patent is connected to the second connection sleeve and is completed through the cooperation of the internal thread and the external thread. When connecting, it is necessary to rotate the joint sleeve to achieve a fastening effect. When the joint part is connected to the cooling pipe body, it is necessary to use tools to tighten the bolts and nuts to complete the connection. Such an operation method requires aligning the threads of the internal thread and the external thread and rotating them evenly to ensure the tight connection of the internal thread and the external thread. The overall use is rather troublesome. And after long-term use, the connection between the internal thread and the external thread is prone to oxidation and rust, resulting in unstable connection, and there is a certain degree of difficulty in disassembly in the later stage.

[0005] Based on this, to solve the above-mentioned technical defects, a quick-installation connection device for liquid cooling pipes of new energy vehicles is now proposed. Summary of the Invention

[0006] In order to overcome the disadvantages that the connection device in the prior art is not convenient for quickly connecting liquid cooling pipes and has inconvenient operation, the technical problem to be solved is: to provide a quick-installation connection device for liquid cooling pipes of new energy vehicles.

[0007] A quick-connect device for a liquid-cooled pipe of a new energy vehicle, comprising a first connecting pipe, a second connecting pipe, a sliding pipe, a support pipe, a fixed pipe, an annular member, a convex block, a return spring, a reinforcement assembly and a clamping assembly. The first connecting pipe and the second connecting pipe are symmetrically distributed, and the first connecting pipe and the second connecting pipe are clamped and engaged with each other. A sliding pipe is slidably connected to the outside of the first connecting pipe, a support pipe is connected to the outside of the second connecting pipe, a fixed pipe is connected to the outside of the support pipe, an annular member is rotatably connected to the right side of the first connecting pipe, two return springs are connected between the annular member and the inside of the first connecting pipe, convex blocks are connected to both the upper and lower ends of the annular member, the convex blocks are in clamping cooperation with the sliding pipe, and the convex blocks are also in clamping cooperation with the fixed pipe. A reinforcement assembly is provided on the fixed pipe, and a clamping assembly is provided on the first connecting pipe.

[0008] Further explanation, the left end opening of the second connecting pipe is conical, the pipe orifice is smaller than the diameter of the pipe body, and the right-side joint of the inner wall of the first connecting pipe is fitted with the left-end joint of the second connecting pipe.

[0009] Further explanation, clamping grooves are provided on both the upper and lower sides of the fixed pipe, the two sides of the left side wall of the fixed pipe are cut with arc surfaces facing in opposite directions, the arc surfaces are communicated with the clamping grooves, the arc surfaces and the clamping grooves are both in contact and cooperation with the convex blocks, sliding grooves are symmetrically provided on the right side of the sliding pipe, and the convex blocks are in clamping cooperation with the corresponding sliding grooves.

[0010] Further explanation, the right-side part of the sliding groove is in an inclined surface shape, which can push the convex block to move out of the clamping groove.

[0011] Further explanation, the reinforcement assembly includes a buffer member and a buffer spring. A buffer member is slidably connected to the support pipe, a buffer spring is connected between the buffer member and the support pipe, the buffer member and the buffer spring are located at the position between the second connecting pipe and the fixed pipe. After the second connecting pipe and the first connecting pipe are clamped, the buffer member is attached to the right wall of the first connecting pipe.

[0012] Further explanation, the clamping assembly includes a clamping block, a clamping spring and a reed. Clamping blocks are symmetrically and slidably connected to the left side of the first connecting pipe, clamping springs are connected between the clamping blocks and the first connecting pipe, notch openings are provided at positions on the sliding pipe aligned with the clamping blocks, the clamping blocks are in clamping connection with the corresponding notch openings, a plurality of reeds are evenly connected along the circumference at the position on the outside of the first connecting pipe to the right of the clamping blocks, and the left ends of the reeds penetrate through the sliding pipe and abut against the sliding pipe.

[0013] Further explanation, the connecting device further includes a limiting block. A plurality of limiting blocks are evenly spaced and connected along the circumference on the outer side wall of the first connecting pipe, limiting grooves are evenly provided along the circumference on the sliding pipe and aligned with the limiting blocks, and the limiting blocks are in sliding clamping connection with the limiting grooves.

[0014] Further explanation: The connecting device further includes a sealing ring. Two sealing rings are spacedly connected at the left joint of the second connecting pipe. The second connecting pipe is engaged and clamped with the first connecting pipe. The sealing ring is attached to the inner wall joint of the first connecting pipe to seal the first connecting pipe and the second connecting pipe.

[0015] Further explanation: The connecting device further includes a docking block. Multiple docking blocks are evenly spaced and connected on both sides of the notch. Docking grooves aligned with the docking blocks are evenly formed on both sides of the clamping block. The docking block is engaged with the docking groove.

[0016] Beneficial effects: 1. The two liquid cooling pipes are respectively connected to the second connecting pipe and the first connecting pipe. By docking the second connecting pipe and the first connecting pipe, the arc surface on the fixed pipe can automatically push the convex block to rotate with the annular part, so that the convex block is engaged with the clamping groove, fixing the sliding pipe and the fixed pipe to each other, completing the connection of the two liquid cooling pipes. The operation is simple and fast, and there is no need to adjust the position and angle of the docking of the fixed pipe and the sliding pipe during the operation.

[0017] 2. The clamping block clamps the sliding pipe, which can ensure the stability between the clamping block and the clamping groove. The docking blocks on the clamping block cooperate with the docking grooves, further improving the stability of the clamping block and ensuring the tightness of the connection of the two liquid cooling pipes.

[0018] 3. When separating the first connecting pipe and the second connecting pipe, just press the clamping block to make the sliding pipe no longer fixed, and then the sliding pipe can be used to push the convex block to rotate and disengage from the clamping groove, and the second connecting pipe will rebound and disengage from the first connecting pipe. The overall operation is simple and fast.

[0019] 4. The buffer member is arranged on the support pipe. When the second connecting pipe is clamped with the first connecting pipe, the buffer member is attached to the right side wall of the first connecting pipe, which can ensure the tightness between the first connecting pipe and the second connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0021] Figure 2 is an exploded view of components such as the sliding pipe, fixed pipe, and support pipe of the present invention.

[0022] Figure 3 is a partial cross-sectional view of components such as the first connecting pipe, second connecting pipe, and fixed pipe of the present invention.

[0023] Figure 4 is a three-dimensional structural schematic diagram of components such as the buffer member, buffer spring, and fixed pipe of the present invention.

[0024] Figure 5 is a three-dimensional structural schematic diagram of components such as the sealing ring, second connecting pipe, and buffer member of the present invention.

[0025] Figure 6Schematic three-dimensional structure diagram of components such as the sliding tube, clamping block, and convex block of the present invention.

[0026] Figure 7 Partial cross-sectional view of components such as the clamping block, clamping spring, and reed of the present invention.

[0027] Figure 8 Exploded view of components such as the clamping block, docking block, and notch of the present invention.

[0028] Figure 9 Partial cross-sectional view of components such as the annular member, convex block, and return spring of the present invention.

[0029] Figure 10 State diagram of the sliding tube moving to disengage the convex block from the card slot after the clamping block of the present invention is extruded.

[0030] Meanings of the reference numerals in the figure: 1 - first connecting pipe, 2 - second connecting pipe, 301 - sliding tube, 302 - support pipe, 303 - fixed pipe, 304 - card slot, 305 - arc surface, 306 - sliding groove, 307 - annular member, 308 - convex block, 309 - return spring, 401 - buffer member, 402 - buffer spring, 403 - sealing ring, 501 - clamping block, 502 - clamping spring, 503 - reed, 504 - notch, 601 - docking groove, 602 - docking block, 701 - limiting block, 702 - limiting groove. Detailed implementation manners

[0031] The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which the presently preferred embodiments of the present invention are shown. However, the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and fully convey the scope of the present invention to those skilled in the art.

[0032] Example: A quick - installation connection device for a liquid - cooled pipe of a new - energy vehicle, as Figures 1 - 10As shown in the figure, it includes a first connecting pipe 1, a second connecting pipe 2, a sliding pipe 301, a support pipe 302, a fixed pipe 303, an annular part 307, a convex block 308, a return spring 309, a reinforcement component and a clamping component. The first connecting pipe 1 and the second connecting pipe 2 are symmetrically distributed left and right, and the first connecting pipe 1 and the second connecting pipe 2 are engaged and clamped. The left end opening of the second connecting pipe 2 is conical, and the pipe orifice is smaller than the pipe body diameter, which is conducive to inserting the second connecting pipe 2 into the first connecting pipe 1 to complete the clamping. The right-side joint of the inner wall of the first connecting pipe 1 fits with the left-end joint of the second connecting pipe 2. The sliding pipe 301 is slidably connected to the outside of the first connecting pipe 1, the support pipe 302 is connected to the outside of the second connecting pipe 2 by bolts, the fixed pipe 303 is welded to the outside of the support pipe 302, the annular part 307 is rotatably connected to the right side of the first connecting pipe 1, two return springs 309 are connected between the annular part 307 and the inside of the first connecting pipe 1, the upper and lower ends of the annular part 307 are both connected with convex blocks 308, the convex blocks 308 are in clamping fit with the sliding pipe 301, and the convex blocks 308 are also in clamping fit with the fixed pipe 303. The fixed pipe 303 is provided with a reinforcement component, and the first connecting pipe 1 is provided with a clamping component.

[0033] As Figure 2 shown, clamping grooves 304 are respectively formed on the upper and lower sides of the fixed pipe 303, the front and rear sides of the left side wall of the fixed pipe 303 are cut with arc surfaces 305 facing in opposite directions, the arc surfaces 305 communicate with the clamping grooves 304, and both the arc surfaces 305 and the clamping grooves 304 are in contact fit with the convex blocks 308. Through the arc surfaces 305, the convex blocks 308 can be pushed to rotate with the annular part 307 so that the convex blocks 308 are clamped with the clamping grooves 304. Symmetric sliding grooves 306 are formed on the upper and lower sides of the right side of the sliding pipe 301, the convex blocks 308 are in clamping fit with the corresponding sliding grooves 306, and the right-side part of the sliding grooves 306 is beveled, which can push the convex blocks 308 to move out of the clamping grooves 304.

[0034] As Figures 2 - 4 shown, the reinforcement component includes a buffer part 401 and a buffer spring 402. The buffer part 401 is slidably connected to the support pipe 302, a buffer spring 402 is connected between the buffer part 401 and the support pipe 302, and the buffer part 401 and the buffer spring 402 are located between the second connecting pipe 2 and the fixed pipe 303. When the second connecting pipe 2 is clamped with the first connecting pipe 1, the buffer part 401 will adhere to the right wall of the first connecting pipe 1 to improve the tightness between the first connecting pipe 1 and the second connecting pipe 2.

[0035] As Figure 1 and Figure 3As shown, the clamping component includes a clamping block 501, a clamping spring 502 and a reed 503. The upper and lower sides of the left side of the first connecting pipe 1 are symmetrically and slidably connected with the clamping block 501. A clamping spring 502 is connected between the clamping block 501 and the first connecting pipe 1. Notches 504 are provided at positions on the sliding pipe 301 aligned with the clamping block 501. The clamping block 501 is clamped with the corresponding notch 504 to fix the sliding pipe 301. A plurality of reeds 503 are evenly connected along the circumference at the position on the outer side of the first connecting pipe 1 to the right of the clamping block 501. The left end of the reed 503 passes through the sliding pipe 301 and abuts against the sliding pipe 301. When the sliding pipe 301 moves to the left, the reed 503 will be deformed by extrusion.

[0036] As Figure 2 , Figure 3 , Figure 4 and Figure 8 As shown, the connecting device further includes a sealing ring 403, a docking block 602 and a limiting block 701. Two sealing rings 403 are connected at intervals at the left joint of the second connecting pipe 2. The second connecting pipe 2 is clamped and connected with the first connecting pipe 1. The sealing ring 403 is attached to the inner wall joint of the first connecting pipe 1 to seal the first connecting pipe 1 and the second connecting pipe 2. A plurality of limiting blocks 701 are evenly welded along the circumference on the outer side wall of the first connecting pipe 1. Limiting grooves 702 aligned with the limiting blocks 701 are evenly provided along the circumference on the sliding pipe 301. The limiting block 701 is slidably clamped with the limiting groove 702. A plurality of docking blocks 602 are evenly welded at the front and rear sides of the notch 504. Docking grooves 601 aligned with the docking blocks 602 are evenly provided at the front and rear sides of the clamping block 501. By clamping the docking block 602 with the docking groove 601, the stability of the clamping block 501 when fixing the sliding pipe 301 is improved, and the sliding pipe 301 is not easily separated from the clamping block 501. When the clamping block 501 is pressed, the docking block 602 is driven to slide linearly along the docking groove 601, so that the docking block 602 is separated from the docking groove 601.

[0037] When connecting two liquid cooling pipes, first connect the two liquid cooling pipes to the first connecting pipe 1 and the second connecting pipe 2 respectively. The connection of the two liquid cooling pipes is completed by the clamping of the first connecting pipe 1 and the second connecting pipe 2. During specific operation, move the second connecting pipe 2 close to the first connecting pipe 1 so that the joint of the first connecting pipe 1 bites and clamps with the inner wall joint of the second connecting pipe 2. The sealing ring 403 moves with the second connecting pipe 2 and will be in close contact with the first connecting pipe 1. During connection, the buffer member 401 will contact the right wall of the first connecting pipe 1. The buffer member 401 is squeezed by the first connecting pipe 1, causing the buffer spring 402 to compress. The buffer member 401 is in close contact with the first connecting pipe 1, which can improve the tightness of the connection between the first connecting pipe 1 and the second connecting pipe 2. And the fixed pipe 303 approaches the sliding pipe 301 and will be sleeved on the outside of the sliding pipe 301. The arc surface 305 on the fixed pipe 303 will contact the convex block 308. When the fixed pipe 303 continues to move, it will push the convex block 308 to rotate with the annular member 307 through the arc surface 305, and the return spring 309 will compress. When the convex block 308 rotates along the arc surface 305, it will align with the card slot 304. The return spring 309 rebounds and resets, causing the convex block 308 and the annular member 307 to reverse and be clamped with the card slot 304. After the first connecting pipe 1 and the second connecting pipe 2 are clamped, the fixed pipe 303 stops moving, and the convex block 308 is stuck in the card slot 304, thereby clamping and fixing the fixed pipe 303 and the sliding pipe 301 through the convex block 308. In this way, the connection between the first connecting pipe 1 and the second connecting pipe 2 is completed. When docking the first connecting pipe 1 and the second connecting pipe 2, there is no need to adjust the angle according to the positions of the fixed pipe 303 and the convex block 308. Just align the first connecting pipe 1 and the second connecting pipe 2. When any position on the arc surface 305 contacts the convex block 308, it can push the convex block 308 to rotate and be clamped with the card slot 304. The operation is simple and fast. And the clamping block 501 clamps the sliding pipe 301. Coupled with the cooperation of the docking block 602 and the docking slot 601, it can ensure the stability of the sliding pipe 301 and further ensure the stability of the docking between the sliding pipe 301 and the fixed pipe 303. When the liquid flows through the liquid cooling pipe, it will flow into the liquid cooling pipe at the other end through the first connecting pipe 1 and the second connecting pipe 2. The right-side joint of the inner wall of the first connecting pipe 1 is in contact with the left-end joint of the second connecting pipe 2. Coupled with the functions of the sealing ring 403 and the buffer member 401, it can ensure the tightness of the connection between the first connecting pipe 1 and the second connecting pipe 2.

[0038] When it is necessary to disassemble the two liquid cooling pipes, separate the first connecting pipe 1 from the second connecting pipe 2. During the specific operation, first press the two clamping blocks 501 to compress the clamping spring 502. The docking block 602 slides along the docking groove 601, so that the docking block 602 disengages from the docking groove 601, and the clamping block 501 no longer engages with the notch 504. Then, the sliding pipe 301 can be pulled to the left alone. The limiting groove 702 slides under the guidance of the limiting block 701. When the sliding pipe 301 moves to the left, it will block the clamping block 501. At the same time, the sliding pipe 301 will squeeze the reed 503 to deform. As the sliding pipe 301 moves to the left, the inclined surface on the sliding groove 306 will push the convex block 308 and the annular part 307 to rotate, and push the convex block 308 away from the clamping groove 304. After the convex block 308 no longer blocks the clamping groove 304, the sliding pipe 301 and the fixed pipe 303 are no longer fixed to each other. The buffer spring 402 will rebound and reset. The force of the buffer spring 402 will cause the support pipe 302, the fixed pipe 303 and the second connecting pipe 2 to move to the right, so that the second connecting pipe 2 is separated from the first connecting pipe 1. Then the staff can release the sliding pipe 301, and the reed 503 will rebound and reset, causing the sliding pipe 301 to move to the right and reset. When the notch 504 on the sliding pipe 301 is aligned with the clamping block 501, the clamping block 501 will drive the docking block 602 to rebound and reset under the reset action of the clamping spring 502. The docking block 602 will re-engage with the docking groove 601, and the clamping block 501 will re-engage with the notch 504, so that the sliding pipe 301 is fixed again. In this way, the separation of the two liquid cooling pipes is completed by separating the first connecting pipe 1 from the second connecting pipe 2.

[0039] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A quick - installation connection device for the liquid - cooling pipe of a new - energy vehicle, characterized in that: It includes a first connecting pipe (1), a second connecting pipe (2), a sliding pipe (301), a support pipe (302), a fixed pipe (303), an annular part (307), a convex block (308), a return spring (309), a reinforcement component and a clamping component. The first connecting pipe (1) and the second connecting pipe (2) are symmetrically distributed, and the first connecting pipe (1) and the second connecting pipe (2) are engaged and clamped. The sliding pipe (301) is slidably connected to the outside of the first connecting pipe (1). The support pipe (302) is connected to the outside of the second connecting pipe (2). The fixed pipe (303) is connected to the outside of the support pipe (302). The annular part (307) is rotatably connected to the right side of the first connecting pipe (1). Two return springs (309) are connected between the annular part (307) and the inside of the first connecting pipe (1). Convex blocks (308) are connected to both the upper and lower ends of the annular part (307). The convex blocks (308) are in clamping cooperation with the sliding pipe (301), and the convex blocks (308) are also in clamping cooperation with the fixed pipe (303). A reinforcement component is provided on the fixed pipe (303), and a clamping component is provided on the first connecting pipe (1); the left end opening of the second connecting pipe (2) is conical, and the pipe orifice is smaller than the pipe body diameter. The right side joint of the inner wall of the first connecting pipe (1) fits with the left end joint of the second connecting pipe (2); Slots (304) are provided on both the upper and lower sides of the fixed pipe (303). The two sides of the left side wall of the fixed pipe (303) are cut with arc surfaces (305) facing in opposite directions. The arc surfaces (305) communicate with the slots (304). Both the arc surfaces (305) and the slots (304) are in contact and cooperation with the convex blocks (308). Sliding grooves (306) are symmetrically provided on the right side of the sliding pipe (301). The convex blocks (308) are in clamping cooperation with the corresponding sliding grooves (306); The right side part of the sliding groove (306) is beveled, which can push the convex block (308) to move out of the slot (304).

2. The quick-connection device for the liquid cooling pipe of a new energy vehicle according to claim 1, characterized in that: The reinforcement component includes a buffer part (401) and a buffer spring (402). The buffer part (401) is slidably connected to the support pipe (302). A buffer spring (402) is connected between the buffer part (401) and the support pipe (302). The buffer part (401) and the buffer spring (402) are located between the second connecting pipe (2) and the fixed pipe (303). After the second connecting pipe (2) and the first connecting pipe (1) are clamped, the buffer part (401) is attached to the right wall of the first connecting pipe (1).

3. The quick-connecting device for the liquid cooling pipe of a new energy vehicle according to claim 2, characterized in that: The clamping component includes a clamping block (501), a clamping spring (502) and a reed (503). The clamping blocks (501) are symmetrically and slidably connected to the left side of the first connecting pipe (1). Clamping springs (502) are connected between the clamping blocks (501) and the first connecting pipe (1). Notches (504) are provided at the positions on the sliding pipe (301) aligned with the clamping blocks (501). The clamping blocks (501) are in clamping connection with the corresponding notches (504). A plurality of reeds (503) are evenly connected along the circumference at the position on the outside of the first connecting pipe (1) to the right of the clamping blocks (501). The left ends of the reeds (503) penetrate through the sliding pipe (301) and abut against the sliding pipe (301).

4. The quick-connection device for the liquid cooling pipe of a new energy vehicle according to claim 3, characterized in that: The connecting device further includes a limiting block (701). A plurality of limiting blocks (701) are evenly spaced and connected along the circumference of the outer side wall of the first connecting pipe (1). Limiting grooves (702) aligned with the limiting blocks (701) are evenly formed along the circumference of the sliding pipe (301). The limiting blocks (701) are slidably clamped with the limiting grooves (702).

5. The quick-connecting device for the liquid-cooling pipe of a new energy vehicle according to claim 4, characterized in that: The connecting device further includes a sealing ring (403). Two sealing rings (403) are spaced and connected at the left joint of the second connecting pipe (2). The second connecting pipe (2) is clamped with the first connecting pipe (1) in a biting manner. The sealing ring (403) is attached to the inner wall joint of the first connecting pipe (1) to seal the first connecting pipe (1) and the second connecting pipe (2).

6. A quick-connection device for a liquid-cooled pipe of a new energy vehicle according to claim 5, characterized in that: The connecting device further includes a docking block (602). A plurality of docking blocks (602) are evenly spaced and connected on both sides of the notch (504). Docking grooves (601) aligned with the docking blocks (602) are evenly formed on both sides of the clamping block (501). The docking blocks (602) are clamped with the docking grooves (601).

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