Power transmission line optimization auxiliary device in complex environment

Abstract

The invention belongs to the technical field of electric power auxiliary equipment, and discloses a power transmission line optimization auxiliary device in a complex environment, which comprises two groups of connecting rod assemblies and a connecting block II, and further comprises clamping assemblies symmetrically mounted on the connecting rod assemblies; the screw rod assembly is arranged on the connecting rod assembly and used for driving the two clamping assemblies to move oppositely after the connecting rod assembly is unfolded. According to the scheme, after the hoop I is hung on the power transmission line, an operator rotates one group of hexagonal blocks to drive the screw rod piece to rotate, so that two sleeves I drive the connecting rods I to move oppositely, and meanwhile, the connecting rods I drive the connecting rods III to move oppositely through the connecting rods II at the two ends; and then the operation is repeated on the other group of connecting rod assembly, screw assembly and clamping assembly, so that the separation of the power transmission lines is quickly realized, and the power transmission lines are connected into a whole to improve the installation efficiency and the safety.

Description

Technical Field

[0001] The present invention belongs to the technical field of power auxiliary equipment, and in particular is a transmission line optimization auxiliary device in a complex environment. Background Art

[0002] Transmission line galloping is a low-frequency, large-amplitude vibration phenomenon of conductors that occurs under specific meteorological conditions, usually caused by factors such as wind excitation, icing or temperature changes. It is extremely harmful and may cause fatigue fracture of conductors, damage to hardware, flashover of insulators, and even collapse accidents, seriously threatening the safe and stable operation of the power grid.

[0003] Generally, operators will connect the split conductors into a whole by installing spacers to improve the rigidity and stability of the system. However, since the installation of spacers requires high-altitude operations, the construction is difficult and inefficient. For the transmission lines in high-voltage transmission lines, due to their long conductors and large wire diameters, their mass per unit length is relatively large. However, since the conductors have a certain sag and tension distribution in the natural state, after the operator installs the spacer on one of the transmission lines, it is necessary to manually pull the remaining transmission lines to the clamping assembly on the spacer for clamping. Since the operation is done at high altitude, this will reduce the operator's force point, which is time-consuming and labor-intensive, and will also increase the danger of the operator's work. Therefore, in order to solve the above problems, a transmission line optimization auxiliary device under complex environments is proposed. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a power transmission line optimization auxiliary device in a complex environment, which solves the problem that operators waste time and effort in installing spacers, thereby reducing installation efficiency.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a power transmission line optimization auxiliary device under complex environment, comprising two groups of connecting rod assemblies and a connecting block 2, and further comprising: a clamping assembly symmetrically mounted on the connecting rod assembly; a screw assembly arranged on the connecting rod assembly for spreading the connecting rod assembly to drive the two groups of clamping assemblies to move toward each other;

[0006] Wherein, the second connecting block is used to connect two sets of screw assemblies and make the two screw assemblies in a vertical state;

[0007] The connecting rod assembly includes two connecting rods 1, two connecting rods 3 and four connecting rods 2, the two ends of the connecting rods 1 are respectively hinged to one end of the two connecting rods 2, and the two ends of the connecting rods 3 are respectively hinged to the other end of the two connecting rods 2;

[0008] The clamping assembly includes a spring combination rod 1 fixedly connected to the side surface of the connecting rod 3, a connecting block 1 is sleeved on the outside of the spring combination rod 1, a spring portion on the spring combination rod 1 is between the connecting block 1 and the connecting rod 3, a sleeve 2 is fixedly connected to one side of the connecting block 1, and the connecting rod 3 is also elastically connected to a spring combination rod 2, one end of the spring combination rod 2 passes through the connecting rod 3, the connecting block 1 and the sleeve 2, and one end of the spring combination rod 2 is fixedly connected to a clamp 1, one end of the clamp 1 is hinged to a clamp 2, a guide groove 2 is provided on the sleeve 2, and a convex shaft that can slide along the guide groove 2 is fixedly connected to the clamp 2;

[0009] The bottom of the second guide groove is trumpet-shaped. When the second clamp drives the convex shaft to rotate around the axis, the convex shaft can squeeze the opening of the second guide groove and move the second sleeve toward the first clamp.

[0010] Preferably, insulating gaskets are fixedly connected to the first clamp and the second clamp.

[0011] Preferably, the sleeve 2 is further provided with a guide groove 1 which is connected to one end of the guide groove 2, the guide groove 1 is in an inclined state, and the convex shaft can slide from the guide groove 2 to the guide groove 1.

[0012] Preferably, when the convex shaft is inserted into the connecting portion of the second guide groove and the first guide groove, a gap is left between the locking end of the second clamping hoop and the first clamping hoop;

[0013] When the convex shaft moves in the guide groove one, the clamp one and the clamp two can be completely closed.

[0014] Preferably, the screw assembly comprises a screw member and a sleeve 1 fixed to a connecting rod 1, the two ends of the screw member are respectively threadedly connected to two screw members, and a hexagonal block is arranged in the middle of the screw member;

[0015] The screw rod is movably sleeved on the second connecting block and is axially limited by the second connecting block;

[0016] The rotating hexagonal block can drive the screw member to rotate and drive the two sleeves to move away from each other.

[0017] Preferably, a ratchet is fixedly connected to the middle of the screw rod, and an elastic pawl capable of engaging with the ratchet is elastically supported inside the hexagonal block.

[0018] Preferably, a fixing assembly is provided on the second connecting rod in one group of the connecting rod assemblies, and a slot capable of engaging with the fixing assembly is provided on the second connecting rod in the other group of the connecting rod assemblies;

[0019] When the connecting rods in the two groups of connecting rod assemblies overlap, the fixing assembly can be snapped into the snap-in groove.

[0020] Preferably, the fixing assembly includes a spring combination rod three elastically connected to the connecting rod two, and a conical clamping block is fixedly connected to one end of the spring combination rod three. The conical clamping block can be retracted into the connecting rod two when squeezed by the connecting rod two in another group of connecting rod assemblies, and when the clamping slot and the spring combination rod three overlap, the conical clamping block will be clamped into the clamping slot by the elastic force of the spring part of the spring combination rod three.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The above scheme is to hang the clamp 1 on the transmission line, rotate the clamp 2 to drive the convex shaft to squeeze the bell mouth of the guide groove 2, so that the sleeve 2 and the connecting block 1 move toward the clamp 1 and the spring part of the spring combination rod 1 is stretched. When the convex shaft moves to the ends of the guide groove 2 and the guide groove 1, the sleeve 2 and the connecting block 1 will be reset by the pulling force of the spring combination rod 1. At this time, the convex shaft is stuck at the end of the guide groove 2, so that the transmission line is fixed between the two groups of insulating gaskets. Then the operator rotates one group of hexagonal blocks to drive the screw rod to rotate, so that the two sleeves drive the connecting rod 1 to move away from each other. At the same time, the connecting rod 1 will also drive the connecting rod 3 to move in opposite directions through the connecting rods 2 at both ends, so that the transmission lines fixed by the clamping assembly are close to each other. Then, the above operation is repeated for another group of connecting rod assemblies, screw assemblies and clamping assemblies, so as to quickly separate the transmission lines and connect them into a whole to improve installation efficiency and safety.

[0023] When one of the connecting rod assemblies in the above scheme moves, the conical block thereon will be squeezed by the edge of the second connecting rod in the other connecting rod assembly, thereby causing the conical block to shrink into the second connecting rod. When the other connecting rod assembly is also deformed, the corresponding second connecting rods on the two connecting rod assemblies will overlap. At this time, the conical block will be inserted into the slot under the elastic force of the spring combination rod three, and at the same time, with the support of the two extended screw rod assemblies, the two connecting rod assemblies will remain in a stable state to separate the transmission lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a structural schematic diagram of the connecting block 2 of the present invention;

[0026] Figure 3 It is a schematic cross-sectional structure diagram of a connection block of the present invention;

[0027] Figure 4 for Figure 3 The structural diagram at A in the middle;

[0028] Figure 5 It is a partial cross-sectional structural schematic diagram of the limit rod of the present invention;

[0029] Figure 6 It is a structural schematic diagram of the sleeve 2 of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the screw assembly of the present invention;

[0031] Figure 8 It is a schematic diagram of the top cross-sectional structure of the hexagonal block of the present invention;

[0032] Fig. 9 It is a structural schematic diagram of the fixing assembly of the present invention;

[0033] Fig.10 for Fig. 9 The enlarged view of point B in the middle;

[0034] Fig.11 for Figure 1 Schematic diagram of the deformed structure.

[0035] In the figure: 1. connecting rod assembly; 11. connecting rod one; 12. connecting rod two; 13. connecting rod three; 2. screw assembly; 21. sleeve one; 22. screw member; 221. ratchet; 23. hexagonal block; 231. elastic pawl; 3. clamping assembly; 31. spring combination rod one; 32. connecting block one; 33. spring combination rod two; 34. sleeve two; 341. guide groove one; 35. guide groove two; 36. clamp one; 37. clamp two; 371. insulating gasket; 38. cam; 4. connecting block two; 5. fixing assembly; 51. spring combination rod three; 52. conical clamp block; 6. clamping groove. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] like Figures 1 to 11 As shown, the present invention provides a power transmission line optimization auxiliary device under complex environment, comprising two groups of connecting rod assemblies 1 and a connecting block 2 4, and further comprising: a clamping assembly 3, which is symmetrically mounted on the connecting rod assembly 1; a screw assembly 2, which is arranged on the connecting rod assembly 1 and is used to open the connecting rod assembly 1 so as to drive the two groups of clamping assemblies 3 to move toward each other; wherein the connecting block 2 4 is used to connect the two groups of screw assemblies 2 and make the two screw assemblies 2 in a vertical state;

[0038] The connecting rod assembly 1 includes two connecting rods 11, two connecting rods 3 13 and four connecting rods 2 12. The two ends of the connecting rod 1 1 are respectively hinged to one end of the two connecting rods 2 12, and the two ends of the connecting rod 3 13 are respectively hinged to the other end of the two connecting rods 2 12.

[0039] The clamping assembly 3 includes a spring combination rod 131 fixedly connected to the side of the connecting rod 3 13, a connecting block 132 is sleeved on the outside of the spring combination rod 131, a spring portion on the spring combination rod 131 is between the connecting block 132 and the connecting rod 3 13, a sleeve 2 34 is fixedly connected to one side of the connecting block 132, a spring combination rod 2 33 is elastically connected to the connecting rod 3 13, one end of the spring combination rod 2 33 passes through the connecting rod 3 13, the connecting block 1 32 and the sleeve 2 34, and one end of the spring combination rod 2 33 is fixedly connected to a clamp 1 36, one end of the clamp 1 36 is hinged to a clamp 2 37, a guide groove 2 35 is provided on the sleeve 2 34, and a convex shaft 38 that can slide along the guide groove 2 35 is fixedly connected to the clamp 2 37;

[0040] The bottom of the second guide groove 35 is horn-shaped. When the second hoop 37 drives the convex shaft 38 to rotate around the axis, the convex shaft 38 can squeeze the opening of the second guide groove 35 and move the second sleeve 34 toward the first hoop 36. Insulating gaskets 371 are fixed to the first hoop 36 and the second hoop 37.

[0041] The screw assembly 2 includes a screw member 22 and a sleeve 21 fixed to the connecting rod 11. The two ends of the screw member 22 are respectively threadedly connected to the two screw members 22. A hexagonal block 23 is arranged in the middle of the screw member 22. The screw member 22 is movably sleeved on the connecting block 24 and is axially limited by the connecting block 24. Rotating the hexagonal block 23 can drive the screw member 22 to rotate and drive the two sleeves 21 to move away from each other.

[0042] By adopting the above scheme, after the clamp 1 36 is hung on the transmission line, the clamp 2 37 is rotated to drive the convex shaft 38 to squeeze the bell mouth of the guide groove 2 35, so that the sleeve 2 34 and the connecting block 1 32 move toward the clamp 1 36 and the spring part of the spring combination rod 1 31 is stretched. When the convex shaft 38 moves to the end of the guide groove 2 35 and the guide groove 1 341, the sleeve 2 34 and the connecting block 1 32 will be reset by the pulling force of the spring combination rod 1 31. At this time, the convex shaft 38 is stuck at the end of the guide groove 2 35, so that the transmission line is fixed. It is fixed between two groups of insulating gaskets 371, and then the operator rotates one group of hexagonal blocks 23 to drive the screw member 22 to rotate, so that the two sleeves 21 drive the connecting rod 11 to move away from each other, and at the same time, the connecting rod 11 will also drive the connecting rod 3 13 to move toward each other through the connecting rod 2 12 at both ends, so that the power transmission lines fixed by the clamping assembly 3 are close to each other, and then the other group of connecting rod assembly 1, screw assembly 2 and clamping assembly 3 are repeated. The above operation is then carried out, so as to quickly separate the power transmission lines and connect them into a whole to improve the installation efficiency and safety.

[0043] like Figure 4-Figure 6 As shown, the sleeve 2 34 is also provided with a guide groove 1 341 which is connected to one end of the guide groove 2 35. The guide groove 1 341 is in an inclined state, and the convex shaft 38 can slide from the guide groove 2 35 to the guide groove 1 341.

[0044] When the convex shaft 38 is inserted into the connecting portion of the second guide groove 35 and the first guide groove 341, a gap is left between the locking end of the second clamping hoop 37 and the first clamping hoop 36;

[0045] When the convex shaft 38 moves in the guide groove 1 341, the clamp 1 36 and the clamp 2 37 can be completely closed;

[0046] By adopting the above scheme, during the mutual movement of the connecting rod three 13, the spring combination rod one 31 will first drive the spring combination rod two 33 and the sleeve two 34 to move through the connecting block one 32, and the movement of the sleeve two 34 will drive the guide groove one 341 to move, thereby forcing the convex shaft 38 to slide in the guide groove one 341, so that the clamp one 36 and the clamp two 37 tighten the clamping of the power transmission line, and at the same time, it is convenient for the operator to quickly clamp the clamp one 36 and the clamp two 37 on the power transmission line.

[0047] like Figure 7 and Figure 8 As shown, a ratchet 221 is fixedly connected to the middle of the screw member 22, and an elastic pawl 231 capable of engaging with the ratchet 221 is elastically supported inside the hexagonal block 23;

[0048] By adopting the above scheme, when the operator uses the wrench to rotate the hexagonal block 23, the operator does not need to re-place the wrench after rotating the hexagonal block 23 to a certain angle, but only needs to rotate the wrench in the opposite direction to drive the hexagonal block 23 and the elastic pawl 231 to rotate in the opposite direction. At this time, the elastic pawl 231 will slide relative to the ratchet 221. After the hexagonal block 23 returns to its initial angle, the operator can continue to rotate the hexagonal block 23 to drive the screw member 22 to rotate and drive the two sleeves 21 to move away from each other.

[0049] like Figure 1-Figure 2 and Figure 9-11 As shown, a fixing assembly 5 is arranged on the second connecting rod 12 in one group of connecting rod assemblies 1, and a slot 6 capable of engaging with the fixing assembly 5 is provided on the second connecting rod 12 in the other group of connecting rod assemblies 1; when the second connecting rods 12 in the two groups of connecting rod assemblies 1 overlap, the fixing assembly 5 can be engaged in the slot 6;

[0050] The fixing assembly 5 comprises a spring combination rod 3 51 elastically connected to the connecting rod 2 12, and a conical clamping block 52 is fixedly connected to one end of the spring combination rod 3 51. The conical clamping block 52 can be retracted into the connecting rod 2 12 when it is squeezed by the connecting rod 2 12 in another group of connecting rod assemblies 1, and when the clamping slot 6 and the spring combination rod 3 51 overlap, the conical clamping block 52 will be clamped into the clamping slot 6 by the elastic force of the spring part of the spring combination rod 3 51;

[0051] By adopting the above scheme, when one group of connecting rod assemblies 1 moves, the conical block 52 thereon will be squeezed by the edge of the connecting rod 12 in the other group of connecting rod assemblies 1, thereby causing the conical block 52 to shrink into the connecting rod 12. When the other group of connecting rod assemblies 1 is also deformed, the corresponding connecting rods 12 on the two groups of connecting rod assemblies 1 will overlap. At this time, under the elastic force of the spring combination rod three 51, the conical block 52 will be inserted into the slot 6, and at the same time, with the support of the two groups of extended screw assemblies 2, the two groups of connecting rod assemblies 1 will remain in a stable state to separate the transmission lines.

[0052] The working principle and use process of the present invention:

[0053] First, the operator hangs the clamp 1 36 on the transmission line and then rotates the clamp 2 37 to drive the convex shaft 38 to squeeze the bell mouth of the guide groove 2 35, so that the sleeve 2 34 and the connecting block 1 32 move toward the clamp 1 36 and the spring part of the spring combination rod 1 31 is stretched. When the convex shaft 38 moves to the end of the guide groove 2 35 and the guide groove 1 341, the sleeve 2 34 and the connecting block 1 32 will be reset by the pulling force of the spring combination rod 1 31. At this time, the convex shaft 38 is stuck at the end of the guide groove 2 35, so that The transmission line is fixed between two sets of insulating gaskets 371, and then the operator rotates one set of hexagonal blocks 23 to drive the screw rod 22 to rotate, so that the two sleeves 21 drive the connecting rod 11 to move away from each other, and at the same time, the connecting rod 11 will also drive the connecting rod 3 13 to move toward each other through the connecting rod 2 12 at both ends, so that the transmission lines fixed by the clamping assembly 3 are close to each other, and then the above operation is repeated for another set of connecting rod assembly 1, screw rod assembly 2 and clamping assembly 3, so as to quickly separate the transmission lines and connect them into a whole;

[0054] In the process of the mutual movement of the connecting rod 3 13, first, the spring combination rod 1 31 will drive the spring combination rod 2 33 and the sleeve 2 34 to move through the connecting block 1 32, and the movement of the sleeve 2 34 will drive the guide groove 1 341 to move, thereby forcing the convex shaft 38 to slide in the guide groove 1 341, so that the clamp 1 36 and the clamp 2 37 tighten the clamping of the transmission line. When the clamp 1 36 and the clamp 2 37 are completely closed, when the sleeve 2 34 moves in the horizontal direction, it will cooperate with the convex shaft 38 at the end of the guide groove 1 341 to drive the clamp 1 36, the clamp 2 37 and the transmission line to move toward each other;

[0055] When one set of connecting rod assemblies 1 moves, the conical block 52 thereon will be squeezed by the edge of the connecting rod 12 in the other set of connecting rod assemblies 1, thereby causing the conical block 52 to shrink into the connecting rod 12. When the other set of connecting rod assemblies 1 is also deformed, the corresponding connecting rods 12 on the two sets of connecting rod assemblies 1 will overlap. At this time, under the elastic force of the spring combination rod 3 51, the conical block 52 will be inserted into the slot 6, and at the same time, with the support of the two sets of extended screw rod assemblies 2, the two sets of connecting rod assemblies 1 will remain in a stable state to separate the transmission lines.

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A power transmission line optimization auxiliary device under complex environment, comprising two sets of connecting rod assemblies (1) and a connecting block 2 (4), characterized in that: Also includes: A clamping assembly (3) symmetrically mounted on the connecting rod assembly (1); A screw assembly (2) is arranged on the connecting rod assembly (1) and is used to open the connecting rod assembly (1) so as to drive the two groups of clamping assemblies (3) to move toward each other; Wherein, the second connecting block (4) is used to connect the two sets of screw assemblies (2) and make the two screw assemblies (2) in a vertical state; The connecting rod assembly (1) comprises two connecting rods 1 (11), two connecting rods 3 (13) and four connecting rods 2 (12), the two ends of the connecting rod 1 (11) are respectively hinged to one end of the two connecting rods 2 (12), and the two ends of the connecting rod 3 (13) are respectively hinged to the other end of the two connecting rods 2 (12); The clamping assembly (3) comprises a spring combination rod (31) fixedly connected to the side of the connecting rod (13), the spring combination rod (31) is sleeved with a connecting block (32) on the outside, the spring portion of the spring combination rod (31) is located between the connecting block (32) and the connecting rod (13), one side of the connecting block (32) is fixedly connected with a sleeve (34), and the connecting rod (13) is also elastically connected with the spring combination rod (31). 3), one end of the spring combination rod 2 (33) passes through the connecting rod 3 (13), the connecting block 1 (32) and the sleeve 2 (34), and one end of the spring combination rod 2 (33) is fixedly connected to a clamp 1 (36), one end of the clamp 1 (36) is hingedly connected to a clamp 2 (37), the sleeve 2 (34) is provided with a guide groove 2 (35), and the clamp 2 (37) is fixedly connected to a convex shaft (38) that can slide along the guide groove 2 (35); The bottom of the second guide groove (35) is horn-shaped. When the second clamp (37) drives the convex shaft (38) to rotate around the axis, the convex shaft (38) can squeeze the opening of the second guide groove (35) and move the second sleeve (34) toward the first clamp (36).

2. The power transmission line optimization auxiliary device under complex environment according to claim 1, characterized in that: Insulating gaskets (371) are fixedly connected to the first clamp (36) and the second clamp (37).

3. The power transmission line optimization auxiliary device under complex environment according to claim 2 is characterized in that: The sleeve 2 (34) is also provided with a guide groove 1 (341) which is connected to one end of the guide groove 2 (35); the guide groove 1 (341) is in an inclined state, and the convex shaft (38) can slide from the guide groove 2 (35) to the guide groove 1 (341).

4. The power transmission line optimization auxiliary device under complex environment according to claim 3 is characterized in that: When the convex shaft (38) is inserted into the connecting portion between the second guide groove (35) and the first guide groove (341), a gap is left between the locking end of the second clamping hoop (37) and the first clamping hoop (36); When the convex shaft (38) moves in the guide groove (341), the clamping hoop (36) and the clamping hoop (37) can be completely closed.

5. The power transmission line optimization auxiliary device under complex environment according to claim 1 is characterized in that: The screw assembly (2) comprises a screw member (22) and a sleeve (21) fixed to a connecting rod (11), the two ends of the screw member (22) are respectively threadedly connected to two screw members (22), and a hexagonal block (23) is arranged in the middle of the screw member (22); The screw rod (22) is movably sleeved on the second connecting block (4) and is axially limited by the second connecting block (4); The rotating hexagonal block (23) can drive the screw member (22) to rotate and drive the two sleeves (21) to move away from each other.

6. The power transmission line optimization auxiliary device under complex environment according to claim 5, characterized in that: A ratchet (221) is fixedly connected to the middle of the screw rod (22), and an elastic pawl (231) capable of engaging with the ratchet (221) is elastically supported inside the hexagonal block (23).

7. The power transmission line optimization auxiliary device under complex environment according to claim 1, characterized in that: A fixing assembly (5) is arranged on the second connecting rod (12) in one group of the connecting rod assemblies (1), and a clamping groove (6) capable of being engaged with the fixing assembly (5) is provided on the second connecting rod (12) in the other group of the connecting rod assemblies (1); When the second connecting rods (12) in the two groups of connecting rod assemblies (1) overlap, the fixing assembly (5) can be snapped into the snap-in groove (6).

8. The power transmission line optimization auxiliary device under complex environment according to claim 7, characterized in that: The fixing assembly (5) comprises a spring combination rod three (51) elastically connected to the connecting rod two (12); one end of the spring combination rod three (51) is fixedly connected to a conical clamping block (52); the conical clamping block (52) can be retracted into the connecting rod two (12) when squeezed by the connecting rod two (12) in another group of connecting rod assemblies (1); and when the clamping groove (6) and the spring combination rod three (51) overlap, the conical clamping block (52) is clamped into the clamping groove (6) by the elastic force of the spring part of the spring combination rod three (51).

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