An environmentally friendly and high-temperature resistant cable structure

Abstract

The present invention is applicable to the technical field of cable-related technologies and provides an environmentally friendly and high-temperature resistant cable structure, including a cable body and a connector body, the cable body is connected to the connector body through a connecting unit, the connector body is provided with a plurality of through holes distributed in a circumferential array for the wire core to pass through, a threaded rod is fixedly connected to the connector body, a traction assembly for pulling the wire core is provided in the connector body, the traction assembly includes a traction unit, and the traction assembly also includes a clamping unit for clamping the wire core. The present invention is connected through the connecting unit, the connector body is provided with a plurality of through holes distributed in a circumferential array for the wire core to pass through, and a threaded rod is also fixedly connected, and is equipped with a traction assembly for pulling and clamping the wire core, which can meet the needs of pulling wire cores of different diameters and then connecting them to the connector body.

Description

Technical Field

[0001] The present invention belongs to the technical field related to cables, and in particular relates to an environmentally friendly and high-temperature resistant cable structure. Background Art

[0002] Cable is a conductor product used to transmit electrical energy, signals or realize electromagnetic energy conversion. Environmentally friendly cable is a cable product that has less impact on the environment during production, use and disposal. It is convenient for effective recycling and reuse of the cable after the end of its service life, reducing resource waste.

[0003] After searching, a Chinese patent entitled "A High-Temperature Resistant and Environmentally Friendly Cable" with publication number CN118920205A was found. The patent uses a tool to rotate the fixing bolt in the fixing hole on the outer surface of the connector, so that the bottom of the fixing bolt passes through the card interface and is connected to the inside of the sliding block in the card interface. The fixing bolt rotates to push the sliding block, the connecting column and the limit plate to press against the outer surface of the wire core to make the limit plate press the wire core against the side of the column to fix and limit the wire core, so as to achieve the effect of accurately connecting the cable core to the installation port; however, there are some shortcomings in the actual use of the above device. The diameter of the inner core of the cable will vary depending on the type, and the inner core of the cable needs to be pulled when it is connected to the connector. The above device cannot pull it according to the different diameters of the inner core. Based on this, an environmentally friendly and high-temperature resistant cable structure that can solve the above problems is now proposed. Summary of the Invention

[0004] The present invention provides an environmentally friendly and high-temperature resistant cable structure, which aims to solve the problem that the diameter of the inner core of the cable varies depending on the type, and the inner core of the cable needs to be pulled when connected to the connector, and the existing device cannot pull it according to the different diameters of the inner core.

[0005] The present invention is implemented as follows: an environmentally friendly and high-temperature resistant cable structure includes a cable body and a connector body, the cable body is connected to the connector body through a connecting unit, the connector body is provided with a plurality of through holes distributed in a circumferential array for the wire core to pass through, at the fixed interface with the external cable, a threaded rod is fixedly connected in the connector body, and a traction assembly for pulling the wire core is provided in the connector body, the traction assembly includes a traction unit, and the traction assembly also includes a clamping unit for clamping the wire core.

[0006] Preferably, an external connection port is fixedly connected to the connector body, a symmetrically arranged connection shell is provided on the connector body, an observation panel is provided on the connection shell, and a passive temperature sensor module is provided in the observation panel.

[0007] Preferably, the connector body is fixedly connected to a plurality of internal connection ports distributed in a circumferential array.

[0008] Preferably, the traction unit includes a first sleeve threadedly connected to the outside of the threaded rod, a plurality of first rotating protrusions distributed in a circumferential array are provided on the side of the first sleeve, a movable sleeve is sleeved on the outside of the threaded rod, an annular clamping protrusion is fixedly connected to the side of the movable sleeve, an annular clamping groove that cooperates with the annular clamping protrusion is provided on the first sleeve, a second clamping protrusion is fixedly connected to the lower end of the movable sleeve, and a guide groove that cooperates with the second clamping protrusion is provided on the threaded rod.

[0009] The lockhole that is formed on the upper of the two ends of the lifting link is formed on the upper surface of the second rim of the lifting link, and the lockhole that is formed on the upper surface of the second rim of the lifting link is formed.

[0010] Preferably, a magnetic ring cooperating with the push ring is fixedly connected to the side surface of the internal connection port, and the push ring can be magnetically connected to the magnetic ring.

[0011] Preferably, the connecting unit includes a second sleeve threadedly connected to the connecting head body, the side of the second sleeve is provided with a plurality of second rotating protrusions distributed in a circumferential array, the connecting head body is provided with a plurality of second through grooves distributed in a circumferential array, a third clamping block is inserted into the second through groove, a third inclined surface is provided on the inner side of the second sleeve, a fourth inclined surface is provided on the third clamping block, and the slopes of the third inclined surface and the fourth inclined surface are the same.

[0012] Preferably, two symmetrically arranged first clamping plates are fixedly connected on both sides of the third clamping block, a third clamping groove is opened on the side of the second through groove, a guide rod is fixedly connected in the third clamping groove, the guide rod passes through the first clamping plate, and the side of the first clamping plate is connected to the side of the third clamping groove through a second spring for providing elastic force, and the second spring is sleeved on the outside of the guide rod.

[0013] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0014] Stable and reliable connection: The connection unit is threadedly connected to the connector body through the second sleeve. Rotating the second sleeve can move the third clamping block inward, tightly connecting the cable body and the connector body. The third clamping block can adapt to cables of different diameters through the cooperation of the first clamping plate, the guide rod and the third spring to ensure the stability of the connection. At the same time, the clamping unit of the traction assembly can effectively clamp the wire core to prevent the wire core from loosening in the connector, further improving the reliability of the connection.

[0015] Easy operation and maintenance: The connection shell on the connector body is equipped with an observation panel, which allows staff to check the internal connection status at any time, facilitating timely detection of problems and maintenance. In addition, the first sleeve of the traction unit and the second sleeve of the connection unit are both equipped with rotating protrusions for easy manual operation, making the traction of the wire core and the connection process of the cable more convenient.

[0016] Reasonable structural design: The through holes and internal connection ports in the connector body are arranged in a circular array. This design is conducive to evenly dispersing the current, reducing current concentration, and improving the conductivity and safety of the cable. At the same time, the structural design of each component is compact and the space utilization is high, making the entire cable structure more compact and lightweight.

[0017] Environmentally friendly and high-temperature resistant: The cable body is made of environmentally friendly and high-temperature resistant insulation materials, such as polytetrafluoroethylene, which can maintain good insulation and mechanical properties in high-temperature environments, extend the service life of the cable, meet environmental protection requirements, and reduce environmental pollution; the connector body is made of high-temperature resistant engineering plastics or metal materials, such as aluminum alloy, which can withstand high-temperature environments and ensure the normal operation of the cable under high-temperature conditions.

[0018] Automatic monitoring of temperature rise status: Embedded passive temperature sensing module sends temperature status at fixed time to predict cable faults and realize autonomous monitoring.

[0019] Strong compatibility: The design of the clamping unit enables the cable structure to adapt to wire cores of different specifications. By adjusting the coordination between the push ring and the magnetic ring, as well as the positions of the first clamping block and the second clamping block, effective clamping of wire cores of different diameters can be achieved. The design of the connecting unit can also adapt to cable bodies of different outer diameters, which improves the versatility and compatibility of the cable structure and can be widely used in a variety of electrical equipment and power transmission systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of an environmentally friendly and high-temperature resistant cable structure provided by the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the overall structure of an environmentally friendly and high-temperature resistant cable structure provided by the present invention. Figure 2 ;

[0022] Figure 3 This is a schematic structural diagram of the connection between the second sleeve and the third clamping block in an environmentally friendly and high-temperature resistant cable structure provided by the present invention;

[0023] Figure 4 This is a schematic diagram of a partial cross-sectional structure of a connector body in an environmentally friendly and high-temperature resistant cable structure provided by the present invention;

[0024] Figure 5 This is a schematic diagram of the internal structure of an environmentally friendly and high-temperature resistant cable structure provided by the present invention. Figure 1 ;

[0025] Figure 6 This is a schematic diagram of the internal structure of an environmentally friendly and high-temperature resistant cable structure provided by the present invention. Figure 2 ;

[0026] Figure 7 This is a schematic structural diagram of the annular clamping protrusion and the annular clamping groove in an environmentally friendly and high-temperature resistant cable structure provided by the present invention;

[0027] Figure 8 This is a structural schematic diagram of a traction unit in an environmentally friendly and high-temperature resistant cable structure provided by the present invention;

[0028] Figure 9 This is a structural schematic diagram of a clamping unit in an environmentally friendly and high-temperature resistant cable structure provided by the present invention;

[0029] Figure 10 It is a structural schematic diagram of the clamping connection between the second clamping plate and the second clamping groove in an environmentally friendly and high-temperature resistant cable structure provided by the present invention.

[0030] Reference numerals: 1. cable body; 2. connector body; 3. through hole; 4. threaded rod; 5. external connection port; 6. connection housing; 7. viewing panel; 8. internal connection port; 9. first sleeve; 10. first rotating protrusion; 11. movable sleeve; 12. annular clamping protrusion; 13. annular clamping groove; 14. connecting ring; 15. first through groove; 16. first clamping block; 17. first clamping protrusion; 18. first clamping groove; 19. clamping plate; 20. first inclined surface; 21 , second inclined surface; 22, second clamping plate; 23, second clamping groove; 24, first connecting plate; 25, first spring; 26, push ring; 27, magnetic ring; 28, second sleeve; 29, second rotating protrusion; 30, second through groove; 31, third clamping block; 32, third inclined surface; 33, fourth inclined surface; 34, first clamping plate; 35, third clamping groove; 36, guide rod; 38, second spring; 39, second clamping protrusion; 40, guide groove; 41, second clamping block. DETAILED DESCRIPTION

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0032] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] The embodiment of the present invention provides an environmentally friendly and high temperature resistant cable structure, such as Figures 1-10 As shown, it includes a cable body 1 and a connector body 2, the cable body 1 is connected to the connector body 2 through a connecting unit, the connector body 2 is provided with a plurality of through holes 3 distributed in a circumferential array for the wire core to pass through, at the fixed interface with the external cable, the connector body 2 is fixed with a threaded rod 4, the connector body 2 is provided with a traction assembly for pulling the wire core, the traction assembly includes a traction unit, and the traction assembly also includes a clamping unit for clamping the wire core.

[0034] Cable body 1: The wire core is wrapped with environmentally friendly and high-temperature resistant insulating materials, such as polytetrafluoroethylene. This material has good high-temperature resistance and insulation properties, and meets environmental protection requirements. Connector body 2: High-temperature resistant engineering plastics or metal materials, such as aluminum alloy, can be selected to ensure structural strength and withstand high-temperature environments.

[0035] The environmentally friendly and high-temperature resistant cable structure is mainly composed of a cable body 1 and a connector body 2, which are connected by a connecting unit. The connector body 2 is provided with a plurality of through holes 3 distributed in a circumferential array for the wire core to pass through. It is also fixedly connected with a threaded rod 4 and is equipped with a traction component for pulling and clamping the wire core, which can meet the needs of pulling wire cores of different diameters and then connecting them to the connector body 2.

[0036] External connection port 5 and connection housing 6: The external connection port 5 is fixed on the connector body 2 to facilitate connection with external equipment; the connector body 2 is provided with a symmetrical connection housing 6, and the connection housing 6 is provided with an observation panel 7, through which the connection status inside the connector body 2 can be checked at any time, such as whether the connection of the wire core is stable and whether there is any damage.

[0037] Internal connection ports 8: The connector body 2 is provided with a plurality of internal connection ports 8 arranged in a circumferential array. These internal connection ports 8 are used for internal connection with other cables or devices. The circumferential array distribution helps to evenly distribute the current and improve the stability of the connection.

[0038] The connector body 2 is fixedly connected to an external connection port 5 , and the connector body 2 is provided with a symmetrically arranged connection shell 6 , and the connection shell 6 is provided with an observation panel 7 , and the observation panel 7 is provided inside the passive temperature sensor module.

[0039] The connector body 2 is fixedly connected to a plurality of internal connection ports 8 distributed in a circumferential array.

[0040] Combine Figure 7 and Figure 8 The traction unit includes a first sleeve 9 threadedly connected to the outside of the threaded rod 4, and a plurality of first rotating protrusions 10 distributed in a circumferential array are provided on the side of the first sleeve 9. A movable sleeve 11 is sleeved on the outside of the threaded rod 4, and an annular clamping protrusion 12 is fixedly connected to the side of the movable sleeve 11. An annular clamping groove 13 is provided on the first sleeve 9 to cooperate with the annular clamping protrusion 12. The lower end of the movable sleeve 11 is fixedly connected to a second clamping protrusion 39, and the threaded rod 4 is provided with a guide groove 40 to cooperate with the second clamping protrusion 39.

[0041] Combine Figure 9 and Figure 10The clamping unit includes a plurality of connecting rings 14 fixedly connected to the side of the movable sleeve 11 and distributed in a circumferential array. The connecting ring 14 is provided with a plurality of first through grooves 15 distributed in a circumferential array. The first through groove 15 is inserted with a first clamping block 16. First clamping protrusions 17 are provided on both sides of the first clamping block 16. The side wall of the first through groove 15 is provided with a first clamping groove 18 that cooperates with the first clamping protrusion 17. A clamping plate 19 for clamping the inner core is fixedly connected to the inward side of the first clamping block 16. The first clamping block 16 is connected to the second clamping block 41. The first A first inclined surface 20 is provided on the clamping block 16, and a second inclined surface 21 is provided on the second clamping block 41. The slopes of the first inclined surface 20 and the second inclined surface 21 are the same. A second clamping plate 22 is fixedly connected to the first inclined surface 20, and a second clamping groove 23 is provided on the second inclined surface 21 to cooperate with the second clamping plate 22. The side of the connecting ring 14 is fixedly connected to the first connecting plate 24, and the side of the first connecting plate 24 is connected to the second clamping block 41 through a first spring 25 for providing elastic force. The outward side of the second clamping block 41 is fixedly connected to a push ring 26.

[0042] The clamping unit comprises a plurality of connecting rings 14 fixed to the side of the movable sleeve 11 in a circumferential array. The connecting rings 14 are provided with a plurality of first through-grooves 15 arranged in a circumferential array. A first clamping block 16 is inserted into the first through-grooves 15. First engaging protrusions 17 on either side of the first clamping block 16 engage with first engaging grooves 18 on the sidewalls of the first through-grooves 15, ensuring that the first clamping block 16 can only move linearly within the first through-grooves 15. A clamping plate 19 is fixedly connected to the inward side of the first clamping block 16 for clamping the wire core. The first clamping block 16 and the second clamping block 41 are connected by the first inclined surface 20 and the second inclined surface 21, and the two have the same slope. The first clamping protrusion 17 on the first inclined surface 20 cooperates with the second clamping groove 23 on the second inclined surface 21 to ensure the stability of the connection between the two; the first connecting plate 24 fixed on the side of the connecting ring 14 is connected to the second clamping block 41 through the first spring 25, providing elastic force for the second clamping block 41; the second clamping block 41 is fixedly connected to the outward side of the second clamping block 41. When the push ring 26 is subjected to the magnetic force of the magnetic ring 27, it will push the second clamping block 41 to move, and then the first clamping block 16 is moved inward through the action of the inclined surface to achieve clamping of the wire core; the magnetic ring 27 fixed on the side of the internal connecting port 8 is magnetically connected to the push ring 26. When the cable is connected, the push ring 26 approaches the magnetic ring 27. Under the action of the magnetic force, the push ring 26 drives the second clamping block 41 to move, completing the clamping operation of the wire core.

[0043] The first sleeve 9 of the traction unit is threadedly connected to the outside of the threaded rod 4, and a plurality of first rotating protrusions 10 distributed in a circumferential array are provided on the side of the first sleeve 9 to facilitate the operator to manually rotate the first sleeve 9; a movable sleeve 11 is sleeved on the outside of the threaded rod 4, and an annular clamping protrusion 12 is fixed on the side of the movable sleeve 11, and an annular clamping groove 13 cooperating therewith is provided on the first sleeve 9; when the first sleeve 9 is rotated, due to the threaded connection, the first sleeve 9 will move along the threaded rod 4, and through the cooperation of the annular clamping protrusion 12 and the annular clamping groove 13, the movable sleeve 11 is driven to move together, thereby realizing the traction of the wire core.

[0044] A magnetic ring 27 that cooperates with the push ring 26 is fixedly connected to the side surface of the internal connection port 8 , and the push ring 26 can be magnetically connected to the magnetic ring 27 .

[0045] Combine Figure 3 and Figure 4 The connecting unit includes a second sleeve 28 threadedly connected to the connecting head body 2, and the side of the second sleeve 28 is provided with a plurality of second rotating protrusions 29 distributed in a circumferential array. The connecting head body 2 is provided with a plurality of second through grooves 30 distributed in a circumferential array, and a third clamping block 31 is inserted into the second through groove 30. A third inclined surface 32 is provided on the inner side of the second sleeve 28, and a fourth inclined surface 33 is provided on the third clamping block 31. The slopes of the third inclined surface 32 and the fourth inclined surface 33 are the same.

[0046] Two symmetrically arranged first clamping plates 34 are fixedly connected to both sides of the third clamping block 31, and a third clamping groove 35 is opened on the side of the second through groove 30. A guide rod 36 is fixedly connected in the third clamping groove 35, and the guide rod 36 passes through the first clamping plate 34. The side of the first clamping plate 34 is connected to the side of the third clamping groove 35 through a second spring 38 for providing elastic force, and the second spring 38 is sleeved on the outside of the guide rod 36.

[0047] The second sleeve 28 of the connection unit is threadedly connected to the connector body 2. A plurality of second rotational protrusions 29 are arranged in a circumferential array on the side of the second sleeve 28 to facilitate operator rotation of the second sleeve 28. The connector body 2 is provided with a plurality of second through-grooves 30 arranged in a circumferential array, with a third clamping block 31 inserted into each of the second through-grooves 30. A third inclined surface 32 on the inside of the second sleeve 28 has the same slope as a fourth inclined surface 33 on the third clamping block 31. Two symmetrical first clamping plates 34 are fixed to either side of the third clamping block 31. A guide rod 36 is fixed to the third clamping groove 35 on the side of the second through-grooves 30. The guide rod 36 passes through the first clamping plate 34, ensuring that the third clamping block 31 can only move linearly along the guide rod 36. The side of the first clamping plate 34 is connected to the side of the third clamping groove 35 via a third spring, which is sleeved around the outside of the guide rod 36. When the second sleeve 28 is rotated, the second sleeve 28 moves along the connector body 2, and the third clamping block 31 moves inward through the action of the third inclined surface 32 and the fourth inclined surface 33, thereby achieving a tight connection between the cable body 1 and the connector body 2.

[0048] To sum up, the working principle of the present invention is as follows: wire core insertion: the wire core of the cable body 1 is passed through the through hole 3 in the connector body 2; wire core pulling: by rotating the first rotating protrusion 10 on the first sleeve 9, the first sleeve 9 is moved along the threaded rod 4, driving the movable sleeve 11 to move, thereby pulling the wire core to a suitable position; wire core clamping: the cable is connected to the internal connection port 8, and the pushing ring 26 is subjected to the magnetic force of the magnetic ring 27 to push the second clamping block 41 to move, so that the first clamping block 16 drives the clamping plate 19 to clamp the wire core; the cable body 1 is connected to the connector body 2: the second rotating protrusion 29 on the second sleeve 28 is rotated to make the second sleeve 28 move along the connector body 2, and the third clamping block 31 is moved inward through the action of the third inclined surface 32 and the fourth inclined surface 33, so that the cable body 1 and the connector body 2 are tightly connected together.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An environmentally friendly and high temperature resistant cable structure, comprising a cable body (1) and a connector body (2), characterized in that: The cable body (1) is connected to the connector body (2) via a connecting unit. The connector body (2) is provided with a plurality of through holes (3) distributed in a circumferential array for the wire core to pass through. At a fixed interface with an external cable, a threaded rod (4) is fixedly connected to the connector body (2). The connector body (2) is provided with a traction assembly for traction of the wire core. The traction assembly includes a traction unit, and the traction assembly also includes a clamping unit for clamping the wire core. The connector body (2) is fixedly connected to a plurality of internal connection ports (8) distributed in a circumferential array; The traction unit comprises a first sleeve (9) threadedly connected to the outside of the threaded rod (4), a side surface of the first sleeve (9) is provided with a plurality of first rotating protrusions (10) distributed in a circumferential array, a movable sleeve (11) is sleeved on the outside of the threaded rod (4), a side surface of the movable sleeve (11) is fixedly connected with an annular clamping protrusion (12), an annular clamping groove (13) is provided on the first sleeve (9) and is matched with the annular clamping protrusion (12), a second clamping protrusion (39) is fixedly connected to the lower end of the movable sleeve (11), and a guide groove (40) is provided on the threaded rod (4) and is matched with the second clamping protrusion (39); The clamping unit includes a plurality of connecting rings (14) fixedly connected to the side of the movable sleeve (11) and distributed in a circumferential array. The connecting ring (14) is provided with a plurality of first through grooves (15) distributed in a circumferential array. The first through groove (15) is inserted with a first clamping block (16). First clamping protrusions (17) are provided on both sides of the first clamping block (16). The side wall of the first through groove (15) is provided with a first clamping groove (18) that cooperates with the first clamping protrusion (17). A clamping plate (19) for clamping the inner core is fixedly connected to the inner side of the first clamping block (16). The first clamping block (16) is connected to the second clamping block (41). A first inclined surface (20) is provided on the first clamping block (16). A second inclined surface (21) is provided on the second clamping block (41), the first inclined surface (20) and the second inclined surface (21) have the same slope, a second clamping plate (22) is fixedly connected to the first inclined surface (20), a second clamping groove (23) is provided on the second inclined surface (21) and is matched with the second clamping plate (22), a first connecting plate (24) is fixedly connected to the side of the connecting ring (14), and the side of the first connecting plate (24) is connected to the second clamping block (41) through a first spring (25) for providing elastic force, a push ring (26) is fixedly connected to the outward side of the second clamping block (41), and a magnetic ring (27) matched with the push ring (26) is fixedly connected to the side of the internal connecting port (8).

2. The environmentally friendly and high temperature resistant cable structure according to claim 1, characterized in that: An external connection port (5) is fixedly connected to the connector body (2), a symmetrically arranged connection housing (6) is provided on the connector body (2), an observation panel (7) is provided on the connection housing (6), and a passive temperature sensing module is provided in the observation panel (7).

3. The environmentally friendly and high temperature resistant cable structure according to claim 1, characterized in that: The connecting unit comprises a second sleeve (28) threadedly connected to the connector body (2), a side surface of the second sleeve (28) is provided with a plurality of second rotating protrusions (29) distributed in a circumferential array, a plurality of second through grooves (30) distributed in a circumferential array are opened on the connector body (2), a third clamping block (31) is inserted into the second through groove (30), a third inclined surface (32) is provided on the inner side of the second sleeve (28), a fourth inclined surface (33) is provided on the third clamping block (31), and the slopes of the third inclined surface (32) and the fourth inclined surface (33) are the same.

4. The environmentally friendly and high temperature resistant cable structure according to claim 3, characterized in that: Two symmetrically arranged first clamping plates (34) are fixedly connected to both sides of the third clamping block (31), a third clamping groove (35) is provided on the side of the second through groove (30), a guide rod (36) is fixedly connected in the third clamping groove (35), the guide rod (36) passes through the first clamping plate (34), the side of the first clamping plate (34) is connected to the side of the third clamping groove (35) through a second spring (38) for providing elastic force, and the second spring (38) is sleeved on the outside of the guide rod (36).

Images