Cable distribution device

Abstract

The application discloses a cable shunt device, which comprises a first chuck and a tooth surface seat. A first clamping hole is formed between the first chuck and the tooth surface seat. The first chuck is provided with a first ratchet tooth surface, and the tooth surface seat is provided with a second ratchet tooth surface. The first chuck and the tooth surface seat are pivotally connected, so that the first chuck and the tooth surface seat can rotate relative to each other, the first ratchet tooth surface and the second ratchet tooth surface are gradually engaged by moving close to each other, and the first clamping hole is reduced. The clamping force is more reliable, so that the phenomenon that the main trunk line and the branch line are disconnected can be effectively prevented, and the normal passage of the circuit is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wire connecting device, in particular to a cable shunt device. BACKGROUND

[0002] The safe use of electricity requires the stable operation of the power grid, and unstable wire connection will bring many troubles to the electricity users. Therefore, when the main line and a branch line are clamped together, the cable shunt device acts as a connecting clamp, and when the main line and multiple branch lines are clamped together and the multiple branch lines are in parallel structure, the cable shunt device acts as a shunt clamp. How to ensure the stable connection of the main line and the branch line depends on whether the clamping force of the cable shunt device is stable and durable.

[0003] At present, the existing cable shunt device mainly uses locking screws to extrude the main line and the branch line to achieve clamping. According to common sense, although the locking screw is easy to clamp, it has the hidden danger of easy loosening, which leads to the loosening of the clamping force, thereby easily leading to the phenomenon of disconnection between the main line and the branch line, i.e. easily leading to the phenomenon of open circuit. For example, the patent application No. 201620003322.6 discloses a cable shunt clamp, and the patent application No. 201420359040.0 discloses a meter connection clamp, both of which provide clamping force through locking screws. When the device is subjected to long-term vibration and shaking, the locking screw is easy to loosen, thereby causing the phenomenon of open circuit. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide a cable shunt device, which has more reliable clamping force, thereby effectively preventing the phenomenon of disconnection between the main line and the branch line, so as to ensure the normal passage of the circuit.

[0005] The purpose of the present application is achieved by adopting the following technical solutions:

[0006] The cable shunt device comprises a first clamp head and a tooth surface seat; a first clamping hole is formed between the first clamp head and the tooth surface seat; the first clamp head is provided with a first ratchet tooth surface, and the tooth surface seat is provided with a second ratchet tooth surface; the first clamp head and the tooth surface seat are pivotally connected, so that the first clamp head and the tooth surface seat can rotate relative to each other, so that the first ratchet tooth surface and the second ratchet tooth surface gradually engage each other, thereby reducing the first clamping hole.

[0007] Further, the cable shunt device further comprises a second chuck, the tooth surface seat is located between the first chuck and the second chuck, a second clamping hole is formed between the second chuck and the tooth surface seat; the second chuck is provided with a third ratchet tooth surface, the tooth surface seat is provided with a fourth ratchet tooth surface, the direction of the first ratchet tooth surface is opposite to the direction of the third ratchet tooth surface, and the direction of the second ratchet tooth surface is opposite to the direction of the fourth ratchet tooth surface; the second chuck and the tooth surface seat are pivotally connected, so that the second chuck and the tooth surface seat can relatively rotate to make the third ratchet tooth surface and the fourth ratchet tooth surface gradually engage with each other to reduce the second clamping hole; part or all of the cable shunt device is a conductor, so that the conductor in the first clamping hole and the conductor in the second clamping hole are connected.

[0008] Further, the cable shunt device further comprises a pivot shaft provided with a first threaded hole, a bolt and an axial feeding extrusion column provided with a second threaded hole, the pivot shaft is pivotally connected with the first chuck, the first threaded hole and the second threaded hole are threadedly connected with the bolt, and the second chuck is provided with an extrusion groove.

[0009] When the cable shunt device is in the open state, the bolt can swing with the pivot shaft;

[0010] When the cable shunt device is in the open state and is converted to the locked state, the nut of the bolt abuts against the axial feeding extrusion column, the axial feeding extrusion column is accommodated in the extrusion groove, so that when the axial feeding extrusion column moves along the axial direction of the bolt, the first ratchet tooth surface and the second ratchet tooth surface can be forced to gradually engage with each other, and the third ratchet tooth surface and the fourth ratchet tooth surface can be forced to gradually engage with each other.

[0011] Further, the first chuck is provided with a first avoiding groove, the second chuck is provided with a second avoiding groove, the pivot shaft passes through the first avoiding groove, and the first avoiding groove and the second avoiding groove are used for avoiding the bolt, so that the bolt can swing relative to the pivot shaft.

[0012] Further, the tooth surface seat comprises a seat body and a rotating shaft, the seat body is connected with the rotating shaft, and an elastic member is arranged between the seat body and the rotating shaft; the second ratchet tooth surface and the fourth ratchet tooth surface are arranged on the seat body, and the first chuck and the second chuck are pivotally connected with the rotating shaft.

[0013] Further, the elastic member is a long strip-shaped spring sheet, and the extension direction of the elastic member is consistent with the axial direction of the rotating shaft.

[0014] Further, one of the seat body and the rotating shaft is provided with a long strip-shaped accommodating groove, and the elastic piece is matched with the accommodating groove; one of the seat body and the rotating shaft is provided with a limiting groove, and the other is provided with a limiting block; the width of one end of the limiting block close to the limiting groove is greater than the width of the other end of the limiting block away from the limiting groove, and the limiting block is slid into the limiting groove along the axial direction of the rotating shaft and matched with the limiting groove to hinder the limiting block from moving away from the limiting groove along the radial direction of the rotating shaft.

[0015] Further, the number of the elastic pieces is at least two, and the two elastic pieces are respectively arranged on opposite sides of the limiting block; the number of the accommodating grooves corresponds to the number of the limiting blocks, and each of the limiting blocks is accommodated in one of the accommodating grooves in a one-to-one correspondence.

[0016] Further, the rotating shaft is sleeved with a first sleeve ring; the first chuck is fixed with two second sleeve rings, and the two second sleeve rings are both sleeved outside the rotating shaft; the second chuck is fixed with two third sleeve rings, and the two third sleeve rings are both sleeved outside the rotating shaft; one of the third sleeve rings, one of the second sleeve rings, the first sleeve ring, the other second sleeve ring and the other third sleeve ring are sequentially stacked.

[0017] Further, the cable shunting device further comprises a pivoting shaft provided with a first threaded hole, a bolt and an axial feeding extrusion column provided with a second threaded hole, the pivoting shaft is pivotally connected with the first chuck, the first threaded hole and the second threaded hole are both threadedly connected with the bolt, and the tooth surface seat is provided with an extrusion groove.

[0018] When the cable shunting device is in the open state, the bolt can swing along with the pivoting shaft.

[0019] When the cable shunting device is in the process of converting from the open state to the locked state, the nut of the bolt abuts against the axial feeding extrusion column, the axial feeding extrusion column is accommodated in the extrusion groove, so that when the axial feeding extrusion column moves along the axial direction of the bolt, the first ratchet tooth surface and the second ratchet tooth surface can be forced to approach each other and gradually engage.

[0020] Compared with the prior art, the beneficial effects of the present application are that:

[0021] By setting the first ratchet tooth surface on the first clamp head, setting the second ratchet tooth surface on the tooth surface seat, and limiting the pivoting of the first clamp head and the tooth surface seat, the engagement of the first ratchet tooth surface and the second ratchet tooth surface can only advance and cannot retreat, so that the first clamping hole is not easy to expand after being reduced by external force vibration or shaking, and the clamping effect of the cable shunt device is better, so that the main trunk line and the branch line are stably conducted, that is, the possibility of poor contact caused by wire breakage is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic view of the cable shunt device (in an open state) of the application.

[0023] Figure 2 It is an exploded view of Figure 1 .

[0024] Figure 3 It is another view of Figure 2 .

[0025] Figure 4 It is a structural schematic view of the cable shunt device (in a locked state) of the application.

[0026] In the figure: 1, cable shunt device; 2, first clamp head; 21, first ratchet tooth surface; 22, first avoiding groove; 23, second sleeve ring; 3, tooth surface seat; 31, seat body; 311, second ratchet tooth surface; 312, fourth ratchet tooth surface; 313, containing groove; 314, limiting block; 32, rotating shaft; 321, limiting groove; 322, first sleeve ring; 33, elastic piece; 4, first clamping hole; 5, second clamp head; 51, third ratchet tooth surface; 52, extrusion groove; 53, second avoiding groove; 54, third sleeve ring; 6, second clamping hole; 7, pivoting shaft; 8, bolt; 9, axial feeding extrusion column; 91, main trunk line; 92, branch line. DETAILED DESCRIPTION

[0027] In the following, the application will be further described in conjunction with the drawings and specific embodiments, and it should be noted that the following described embodiments or technical features can be combined to form new embodiments without conflict.

[0028] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be a middle element. The "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this description, the terms "may" and "might" include any one or all combinations of one or more occurrences of the stated item or process.

[0030] First embodiment:

[0031] Figures 1-4 A cable distribution device 1 of a first embodiment of the present application is shown. Referring to Figure 1 , the cable distribution device 1 comprises a first clamp head 2 and a tooth surface seat 3. A first clamping hole 4 is formed between the first clamp head 2 and the tooth surface seat 3 to accommodate a trunk line 91 and at least one branch line 92 through the first clamping hole 4. Referring to Figure 2 , the first clamp head 2 is provided with a first ratchet tooth surface 21, and the tooth surface seat 3 is provided with a second ratchet tooth surface 311; Referring to Figure 1 and Figure 2 , the first clamp head 2 is pivotally connected to the tooth surface seat 3 to enable relative rotation between the first clamp head 2 and the tooth surface seat 3 so that the first ratchet tooth surface 21 and the second ratchet tooth surface 311 are gradually engaged with each other to reduce the first clamping hole 4, thereby clamping the trunk line 91 and the at least one branch line 92 together. It can be understood that when the number of branch lines 92 is one, the cable distribution device 1 functions as a connection clamp; when the number of branch lines 92 is more than one, the cable distribution device 1 functions as a distribution clamp. Obviously, by providing the first ratchet tooth surface 21 on the first clamp head 2, the second ratchet tooth surface 311 on the tooth surface seat 3, and limiting the pivotal connection between the first clamp head 2 and the tooth surface seat 3, the engagement of the first ratchet tooth surface 21 and the second ratchet tooth surface 311 can only proceed and cannot retreat, thereby preventing the first clamping hole 4 from expanding due to external force vibration or shaking after the first clamping hole 4 is reduced, and further improving the clamping effect of the cable distribution device 1 to ensure stable conduction between the trunk line 91 and the branch line 92, i.e., significantly reducing the possibility of poor contact due to disconnection.

[0032] Preferably, referring to Figure 1 and Figure 2, the cable shunt device 1 further comprises a second clamp head 5, the tooth surface seat 3 is located between the first clamp head 2 and the second clamp head 5, and a second clamping hole 6 is formed between the second clamp head 5 and the tooth surface seat 3. In this way, one branch line 92 can be accommodated in the first clamping hole 4 and the second clamping hole 6 respectively, and the main stem line 91 can be accommodated in the first clamping hole 4 or the second clamping hole 6. At this time, based on the number of branch lines 92 exceeding one, the cable shunt device 1 plays a role of shunt clamping. In order to enable the first clamping hole 4 and the second clamping hole 6 to be reduced to realize the clamping effect, the second clamp head 5 is necessarily provided with a third ratchet tooth surface 51, the tooth surface seat 3 is necessarily provided with a fourth ratchet tooth surface 312, the direction of the first ratchet tooth surface 21 is opposite to the direction of the third ratchet tooth surface 51, and the direction of the second ratchet tooth surface 311 is opposite to the direction of the fourth ratchet tooth surface 312. The second clamp head 5 and the tooth surface seat 3 are pivotally connected, so that the second clamp head 5 and the tooth surface seat 3 can relatively rotate to make the third ratchet tooth surface 51 and the fourth ratchet tooth surface 312 approach each other and gradually engage, so as to reduce the second clamping hole 6. Similarly, the working principle between the third ratchet tooth surface 51 and the fourth ratchet tooth surface 312 is equivalent to the working principle between the first ratchet tooth surface 21 and the second ratchet tooth surface 311. Necessarily, part or all of the cable shunt device 1 is a conductor, so as to make the conductive wire in the first clamping hole 4 and the conductive wire in the second clamping hole 6. That is to say, either the first clamp head 2 and the second clamp head 5 are conductors, or the tooth surface seat 3 is a conductor, or the entire cable shunt device 1 is a conductor. Among them, in the actual product, the tooth surface seat 3 is preferably made of copper material.

[0033] Preferably, referring to Figure 1 and Figure 2 , the cable shunt device 1 further comprises a pivot shaft 7 provided with a first threaded hole, a bolt 8, and an axial feeding extrusion column 9 provided with a second threaded hole. The pivot shaft 7 is pivotally connected with the first clamp head 2, the first threaded hole and the second threaded hole are both threadedly connected with the bolt 8, and the second clamp head 5 is provided with an extrusion groove 52. When the cable shunt device 1 is in an open state, the bolt 8 can swing with the pivot shaft 7, so as to facilitate the main stem line 91 and the branch line 92 to be respectively loaded into the first clamping hole 4 and the second clamping hole 6, and then the bolt 8 is swung to drive the axial feeding extrusion column 9 to move to the vicinity of the extrusion groove 52. When the cable shunt device 1 is in the process of converting from the open state to the locked state, referring to Figure 2 and Figure 4, the screw cap of the bolt 8 is in abutment with the axial feeding extrusion column 9, the axial feeding extrusion column 9 is accommodated in the extrusion groove 52, so that when the axial feeding extrusion column 9 moves along the axial direction of the bolt 8, the first ratchet tooth surface 21 and the second ratchet tooth surface 311 can be forced to approach each other and gradually engage, and the third ratchet tooth surface 51 and the fourth ratchet tooth surface 312 can be forced to approach each other and gradually engage. Obviously, in this way, through the fastening effect of the bolt 8, the first chuck 2 and the second chuck 5 are locked together, that is, a double reinforcement effect is achieved, thereby further preventing the loosening of the main trunk line 91 or the branch line 92.

[0034] Preferably, referring to Figure 2 , the first chuck 2 is provided with a first avoiding groove 22, the second chuck 5 is provided with a second avoiding groove 53, the pivot shaft 7 penetrates the first avoiding groove 22, and the first avoiding groove 22 and the second avoiding groove 53 are used for avoiding the bolt 8, so that the bolt 8 can swing relative to the pivot shaft 7. In this way, the first chuck 2 can be provided with a first double-layer support plate to support the pivot shaft 7, and the second chuck 5 can be provided with a second double-layer support plate to support the bolt 8 (see Figure 4 ), so as to improve the connection strength of the bolt 8.

[0035] Preferably, referring to Figure 3 , the tooth surface seat 3 comprises a seat body 31 and a rotating shaft 32, the seat body 31 is connected with the rotating shaft 32, and an elastic member 33 is arranged between the seat body 31 and the rotating shaft 32. Referring to Figure 2 , the second ratchet tooth surface 311 and the fourth ratchet tooth surface 312 are arranged on the seat body 31, and the first chuck 2 and the second chuck 5 are respectively pivoted with the rotating shaft 32. In this way, the seat body 31 and the rotating shaft 32 can approach each other by a certain distance through elastic extrusion, so that the first ratchet tooth surface 21 and the second ratchet tooth surface 311 can be away from each other, and the third ratchet tooth surface 51 and the fourth ratchet tooth surface 312 can be away from each other. In this way, it provides possible conditions for the cable shunt device 1 to return to the open state. That is, after loosening the bolt 8, the seat body 31 is extruded by hand, so that the elastic member 33 is compressed, the first chuck 2 and the tooth surface seat 3 can be disengaged from the engagement relationship, and the second chuck 5 and the tooth surface seat 3 can be disengaged from the engagement relationship, so that the cable shunt device 1 can return to the open state.

[0036] Preferably, referring to Figure 3The elastic member 33 is a long strip spring, and the extending direction of the elastic member 33 is consistent with the axial direction of the rotating shaft 32. In this way, the elastic contact surface between the seat body 31 and the rotating shaft 32 is larger, so that the seat body 31 and the rotating shaft 32 can be reliably separated by the elastic member 33, to prevent the first chuck 2 and the tooth surface seat 3 from being loose, and to prevent the second chuck 5 and the tooth surface seat 3 from being loose.

[0037] Preferably, referring to Figure 3 In order to prevent the elastic member 33 from falling off, one of the seat body 31 and the rotating shaft 32 is provided with a long strip accommodating groove 313, and the elastic member 33 is matched with the accommodating groove 313. In order to prevent the seat body 31 and the rotating shaft 32 from being separated by the elastic force of the elastic member 33, referring to Figure 2 and Figure 3 Preferably, one of the seat body 31 and the rotating shaft 32 is provided with a limiting groove 321, and the other is provided with a limiting block 314; the width of one end of the limiting block 314 close to the limiting groove 321 is greater than the width of the other end of the limiting block 314 away from the limiting groove 321, and the limiting block 314 slides into the limiting groove 321 along the axial direction of the rotating shaft 32 and is matched with the limiting groove 321, to prevent the limiting block 314 from moving away from the limiting groove 321 along the radial direction of the rotating shaft 32. Obviously, in this way, the seat body 31 and the rotating shaft 32 can be close or away from each other by a short distance, so as to provide the necessary distance for the mutual separation of the first chuck 2 and the tooth surface seat 3, and to provide the necessary distance for the mutual separation of the second chuck 5 and the tooth surface seat 3.

[0038] Preferably, referring to Figure 3 In order to improve the connection stability, the number of elastic members 33 is at least two, and the two elastic members 33 are respectively arranged on the opposite sides of the limiting block 314; the number of accommodating grooves 313 corresponds to the number of limiting blocks 314, and each limiting block 314 is respectively and one-to-one accommodated in one of the accommodating grooves 313.

[0039] Preferably, in order to further improve the connection stability, the rotating shaft 32 is sleeved with a first sleeve ring 322; the first chuck 2 is fixed with two second sleeve rings 23, and the two second sleeve rings 23 are both sleeved outside the rotating shaft 32; the second chuck 5 is fixed with two third sleeve rings 54, and the two third sleeve rings 54 are both sleeved outside the rotating shaft 32; one of the third sleeve rings 54, one of the second sleeve rings 23, the first sleeve ring 322, the other second sleeve ring 23, and the other third sleeve ring 54 are sequentially stacked.

[0040] Second embodiment:

[0041] The second embodiment provides the cable distribution device 1 comprising the first embodiment, which is different from the first embodiment in that the cable distribution device 1 of the second embodiment is not provided with the second clamp 5, and thus the extrusion groove 52 needs to be provided on the tooth surface seat 3. Specifically, since no structural schematic diagram is attached based on the embodiment, reference can be made to Figure 1 The cable distribution device 1 further comprises a pivot shaft 7 provided with a first threaded hole, a bolt 8, and an axial feeding extrusion column 9 provided with a second threaded hole, the pivot shaft 7 is pivotally connected with the first clamp 2, the first threaded hole and the second threaded hole are threadedly connected with the bolt 8, and the tooth surface seat 3 is provided with the extrusion groove 52.

[0042] When the cable distribution device 1 is in the open state, the bolt 8 can swing along with the pivot shaft 7. When the cable distribution device 1 is in the process of converting from the open state to the locked state, the nut of the bolt 8 abuts against the axial feeding extrusion column 9, the axial feeding extrusion column 9 is accommodated in the extrusion groove 52, so that when the axial feeding extrusion column 9 moves along the axial direction of the bolt 8, the first ratchet tooth surface 21 and the second ratchet tooth surface 311 can be forced to approach each other and gradually engage. Obviously, in this way, through the fastening effect of the bolt 8, the first clamp 2 and the tooth surface seat 3 are locked together, that is, a double reinforcement effect is achieved, thereby further preventing the phenomenon of loosening of the main trunk line 91 or the branch line 92.

[0043] The above embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and replacements made by those skilled in the art on the basis of the present application all belong to the scope of protection claimed by the present application.

Claims

1. A cable splitter, characterized in that... The system includes a first chuck and a toothed seat; the first chuck and the toothed seat form a first clamping hole; the first chuck has a first ratchet tooth surface, and the toothed seat has a second ratchet tooth surface; the first chuck and the toothed seat are pivotally connected so that the first chuck and the toothed seat can rotate relative to each other, causing the first ratchet tooth surface and the second ratchet tooth surface to approach each other and gradually engage, thereby reducing the size of the first clamping hole; The cable shunt device further includes a second clamp, and the toothed seat is located between the first clamp and the second clamp. The second clamp and the toothed seat form a second clamping hole. The second clamp has a third ratchet tooth surface, and the toothed seat has a fourth ratchet tooth surface. The orientation of the first ratchet tooth surface is opposite to the orientation of the third ratchet tooth surface, and the orientation of the second ratchet tooth surface is opposite to the orientation of the fourth ratchet tooth surface. The second clamp is pivotally connected to the toothed seat so that the second clamp and the toothed seat can rotate relative to each other, causing the third ratchet tooth surface and the fourth ratchet tooth surface to approach each other and gradually engage, thereby reducing the size of the second clamping hole. The cable splitting device further includes a pivot shaft with a first threaded hole, a bolt, and an axial feed extrusion column with a second threaded hole. The pivot shaft is pivotally connected to the first chuck, and both the first threaded hole and the second threaded hole are threadedly connected to the bolt. The second chuck is provided with an extrusion groove. When the cable shunt device is in the open state, the bolt can swing along with the pivot shaft; When the cable shunt device is transitioning from the open state to the locked state, the nut of the bolt abuts against the axial feed extrusion column, which is housed in the extrusion groove. This allows the axial feed extrusion column to move along the axial direction of the bolt, thereby forcing the first ratchet tooth surface and the second ratchet tooth surface to approach each other and gradually engage, as well as forcing the third ratchet tooth surface and the fourth ratchet tooth surface to approach each other and gradually engage. The tooth surface seat includes a seat body and a rotating shaft. The seat body is connected to the rotating shaft, and an elastic element is provided between the seat body and the rotating shaft.

2. The cable splitter as described in claim 1, characterized in that... The cable shunt device is partially or entirely made of conductors to facilitate the connection between the wires in the first clamping hole and the wires in the second clamping hole.

3. The cable shunting device as described in claim 1, characterized in that... The first chuck has a first clearance groove, the second chuck has a second clearance groove, and the pivot shaft passes through the first clearance groove. Both the first clearance groove and the second clearance groove are used to allow the bolt to make way so that the bolt can swing relative to the pivot shaft.

4. The cable splitter as described in claim 1, characterized in that... The second ratchet tooth surface and the fourth ratchet tooth surface are both provided on the seat body, and the first chuck and the second chuck are respectively pivotally connected to the rotating shaft.

5. The cable shunting device as described in claim 4, characterized in that... The elastic element is a long strip-shaped spring sheet, and the extension direction of the elastic element is consistent with the axial direction of the rotating shaft.

6. The cable shunting device as described in claim 5, characterized in that... One of the base and the rotating shaft is provided with an elongated receiving groove, and the elastic element is adapted to the receiving groove; one of the base and the rotating shaft is provided with a limiting groove, and the other is provided with a limiting block; the width of the limiting block at the end near the limiting groove is greater than the width of the limiting block at the end away from the limiting groove, and the limiting block slides into the limiting groove along the axial direction of the rotating shaft and is adapted to the limiting groove, so as to prevent the limiting block from moving away from the limiting groove along the radial direction of the rotating shaft.

7. The cable shunting device as described in claim 6, characterized in that... The number of elastic elements is at least two, and the two elastic elements are respectively disposed on opposite sides of the limiting block. The number of receiving slots corresponds to the number of limiting blocks, and each limiting block is respectively housed in one of the receiving slots.

8. The cable shunting device as described in claim 4, characterized in that... The rotating shaft is surrounded by a first collar; the first clamp is fixed with two second collars, both of which are sleeved on the outside of the rotating shaft; the second clamp is fixed with two third collars, both of which are sleeved on the outside of the rotating shaft; one of the third collars, one of the second collars, the first collar, another second collar, and another third collar are arranged in sequence.

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