CN216671485U - Insulating pull rod and circuit breaker - Google Patents

Abstract

The utility model relates to the technical field of electrical equipment and discloses an insulating pull rod and a circuit breaker. The insulating pull rod comprises an insulating shell, a nut, a connecting rod, an elastic piece and a switching rod. The first end of the insulating shell is provided with an accommodating groove; the nut is arranged at the opening of the accommodating groove and connected with the insulating shell, and an arc-shaped groove is formed in the inner side wall of the nut along the circumferential direction; the first end of the connecting rod is arranged in the accommodating groove, the second end of the connecting rod is provided with external threads and penetrates through the nut to extend out of the insulating shell, a protruding block is convexly arranged on the side wall of the connecting rod, and the protruding block is positioned in the arc-shaped groove; the elastic piece is arranged in the accommodating groove, one end of the elastic piece is abutted against the bottom surface of the accommodating groove, and the other end of the elastic piece is abutted against the connecting rod; one end of the switching rod is connected with the second end of the insulating shell, and the other end of the switching rod is provided with a through hole. The angle of the switching rod can be adjusted while the stable connection between the insulating pull rod and the embedded pole is ensured, so that the insulating pull rod is conveniently connected with other structures, and the practicability is improved.

Description

Insulating pull rod and circuit breaker

Technical Field

The utility model relates to the technical field of electrical equipment, in particular to an insulating pull rod and a circuit breaker.

Background

Be provided with in the circuit breaker and seal utmost point post admittedly, the movable conducting rod that seals utmost point post admittedly passes through insulating pull rod and other structural connection inside the circuit breaker. Generally speaking, the movable conducting rod is provided with a threaded hole, one end of the insulating pull rod is provided with a threaded rod, and the threaded rod is in threaded connection with the threaded hole, so that the movable conducting rod is connected with the insulating pull rod. The other end of insulating pull rod is provided with the switching pole, has radially seted up the through-hole on the switching pole, is provided with the pin on the circuit breaker inner structure, and the pin inserts in the through-hole, realizes insulating pull rod and the inside structural connection of circuit breaker. After the movable conducting rod is connected with the insulating pull rod, the insulating pull rod cannot be rotated again in order to prevent the movable conducting rod from being separated from the insulating pull rod, so that the direction of the through hole in the switching rod is determined, and when the switching rod is connected with other structures, the direction of the through hole cannot be adjusted, and the insulating pull rod is not convenient to be connected with other structures inside the circuit breaker.

Accordingly, there is a need for an insulating pull rod and a circuit breaker that solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an insulating pull rod and a circuit breaker, which can ensure the stable connection between the insulating pull rod and a solid-sealed polar pole, can adjust the angle of a switching rod, are convenient for the insulating pull rod to be connected with other structures in the circuit breaker, and improve the practicability.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an insulated tie rod comprising:

the first end of the insulating shell is provided with an accommodating groove;

the nut is arranged at the opening of the accommodating groove and connected with the insulating shell, and an arc-shaped groove is formed in the inner side wall of the nut along the circumferential direction;

the first end of the connecting rod is arranged in the accommodating groove, the second end, far away from the first end, of the connecting rod is provided with external threads and penetrates through the nut to extend out of the insulating shell, a protruding block is arranged on the side wall of the connecting rod in a protruding mode and is located in the arc-shaped groove, and the protruding block can rotate along the arc-shaped groove and is abutted to two end faces of the arc-shaped groove in the circumferential direction;

the elastic piece is arranged in the accommodating groove, one end of the elastic piece is abutted against the bottom surface of the accommodating groove, and the other end of the elastic piece is abutted against the connecting rod;

one end of the adapter rod is connected with the second end, away from the first end, of the insulating shell, and the other end of the adapter rod is provided with a through hole.

As an optional technical scheme of an insulating pull rod, the inside wall of nut is equipped with the ring channel along circumference ring, set up on the groove lateral wall of ring channel the arc wall, the bulge loop is equipped with the bulge loop on the lateral wall of connecting rod, the bulge loop is arranged in the ring channel, the protrusion sets up on the lateral wall of bulge loop the protrusion piece.

As an optional technical scheme of the insulating pull rod, the insulating shell comprises a cylinder body and an injection molding shell, the accommodating groove is formed in the cylinder body, and the injection molding shell is coated outside the cylinder body.

As an optional technical scheme of insulating pull rod, the spacing annular has been seted up on the cell wall of storage tank, spacing annular link up the open end of barrel, the internal thread has been seted up on the lateral wall of spacing annular, the nut is arranged in the spacing annular and through the internal thread with barrel threaded connection.

As an optional technical scheme of the insulating pull rod, a barrel anti-drop ring groove is formed in the outer side wall of the barrel along the circumferential direction.

As an optional technical scheme of the insulating pull rod, the insulating pull rod further comprises a connecting piece, the connecting piece is embedded in the second end of the insulating shell, a threaded hole is formed in the connecting piece, the threaded hole penetrates through the end face of the second end of the insulating shell, and the threaded hole is in threaded connection with the adapter rod.

As an optional technical scheme of the insulating pull rod, a connecting piece anti-drop ring groove is formed in the side wall of the connecting piece along the circumferential direction.

As an optional technical scheme of the insulating pull rod, an operation hole is formed in the end face, facing the outside of the accommodating groove, of the nut.

As an optional technical scheme of the insulating pull rod, a riveting opening is formed in the edge of the end face, facing the outside of the accommodating groove, of the nut.

The circuit breaker comprises a solid-sealed polar pole and the insulating pull rod, wherein the solid-sealed polar pole comprises a movable conductive rod, and the second end of the connecting rod is in threaded connection with the movable conductive rod.

The utility model has the beneficial effects that:

the embodiment provides an insulating pull rod, including insulating shell, nut, connecting rod, elastic component and switching pole. The nut is located the opening part of storage tank and is connected with the insulating casing, has seted up the arc wall on the inside wall of nut. One end of the connecting rod is arranged in the accommodating groove of the insulating shell, and the other end of the connecting rod penetrates through the nut and extends out of the insulating shell and is used for being in threaded connection with the movable conducting rod of the solid-sealed polar pole. The connecting rod epirelief is equipped with the bulge piece, and the bulge piece can be followed the arc wall and rotated and follow two terminal surface butts of circumference with the arc wall in arranging the arc wall in, and the bulge piece. When the insulating pull rod is rotated to be in threaded connection with the movable conducting rod, the insulating shell is rotated, the nut and the insulating shell rotate synchronously, the protruding block can be abutted against one end face of the arc-shaped groove, the connecting rod and the insulating shell rotate synchronously, and the threaded connection process is achieved. After being connected insulating pull rod and moving the conducting rod, when the angle of switching pole was adjusted to needs, the insulating shell of antiport, the arc wall was rotated along to the bulge piece this moment, produced relative rotation between connecting rod and the insulating shell promptly, had avoided the connecting rod to rotate along with the insulating shell, when guaranteeing insulating pull rod and seal the stable connection between the utmost point post admittedly, can adjust the angle of switching pole again, the insulating pull rod of being convenient for and other structural connection of circuit breaker inside have improved the practicality.

The circuit breaker provided by the embodiment comprises the solid-sealed polar pole and the insulating pull rod. When the insulating pull rod is rotated to be in threaded connection with the movable conducting rod of the solid-sealed polar pole, the insulating shell is rotated, the nut and the insulating shell rotate synchronously, the protruding block can be abutted against one end face of the arc-shaped groove, the connecting rod and the insulating shell rotate synchronously, and the threaded connection process is achieved. After being connected insulating pull rod and moving the conducting rod, when the angle of switching pole was adjusted to needs, the insulating shell of antiport, the arc wall was rotated along to the bulge piece this moment, produced relative rotation between connecting rod and the insulating shell promptly, had avoided the connecting rod to rotate along with the insulating shell, when guaranteeing insulating pull rod and seal the stable connection between the utmost point post admittedly, can adjust the angle of switching pole again, the insulating pull rod of being convenient for and other structural connection of circuit breaker inside have improved the practicality.

Drawings

FIG. 1 is a cross-sectional view of an insulated drawbar according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a nut according to an embodiment of the present invention from a first perspective;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken in the direction B-B of FIG. 2;

FIG. 5 is a schematic diagram of a second perspective of a nut provided in accordance with an embodiment of the present invention;

FIG. 6 is a top view of an insulated pull rod provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a connecting rod provided in an embodiment of the present invention;

fig. 8 is a top view of a connecting rod provided by an embodiment of the present invention.

In the figure:

1. an insulating case; 11. a barrel; 111. a containing groove; 1111. a limiting ring groove; 112. the barrel is provided with an anti-drop ring groove; 12. injection molding the housing; 121. a convex ring part;

2. a nut; 21. an arc-shaped slot; 211. a stop surface; 212. an end face; 22. an operation hole; 23. riveting the opening;

3. a connecting rod; 31. a convex ring; 311. a protruding block; 32. a threaded segment;

4. an elastic member;

5. a connecting member; 51. a threaded hole; 52. the connecting piece is provided with an anti-drop ring groove;

6. a gasket.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

The present embodiment provides an insulated draw bar, and particularly, as shown in fig. 1 to 8, the insulated draw bar includes an insulating case 1, a nut 2, a connecting rod 3, an elastic member 4, and an adaptor rod (not shown). The first end of the insulating shell 1 is provided with a containing groove 111; the nut 2 is arranged at the opening of the accommodating groove 111 and connected with the insulating shell 1, an arc-shaped groove 21 is formed in the inner side wall of the nut 2 along the circumferential direction, the first end of the connecting rod 3 is arranged in the accommodating groove 111, the second end, far away from the first end, of the connecting rod 3 is provided with an external thread and penetrates through the nut 2 to extend out of the insulating shell 1, a protruding block 311 is arranged on the side wall of the connecting rod 3 in a protruding mode, the protruding block 311 is located in the arc-shaped groove 21, and the protruding block 311 can rotate along the arc-shaped groove 21 and is abutted to two end faces 212 of the arc-shaped groove 21 along the circumferential direction; the elastic piece 4 is arranged in the accommodating groove 111, one end of the elastic piece 4 is abutted against the bottom surface of the accommodating groove 111, and the other end is abutted against the connecting rod 3; one end of the switching rod is connected with the second end, far away from the first end, of the insulating shell 1, and the other end of the switching rod is provided with a through hole.

Specifically, the second end of the connecting rod 3 is provided with an external thread to form a threaded section 32, and the threaded section 32 is in threaded connection with the movable conducting rod.

The insulating pull rod provided by the embodiment comprises an insulating shell 1, a nut 2, a connecting rod 3, an elastic piece 4 and a switching rod. The nut 2 is located at the opening of the containing groove 111 and connected with the insulating shell 1, and an arc-shaped groove 21 is formed in the inner side wall of the nut 2. One end of the connecting rod 3 is arranged in the accommodating groove 111 of the insulating shell 1, and the other end of the connecting rod passes through the nut 2 and extends out of the insulating shell 1 and is used for being in threaded connection with the movable conducting rod of the solid-sealed polar pole. The connecting rod 3 is convexly provided with a convex block 311, the convex block 311 is arranged in the arc-shaped groove 21, and the convex block 311 can rotate along the arc-shaped groove 21 and abut against two end surfaces 212 of the arc-shaped groove 21 along the circumferential direction. When the insulating pull rod is rotated to be in threaded connection with the movable conducting rod, the insulating shell 1 is rotated, the nut 2 and the insulating shell 1 rotate synchronously, the protruding block 311 can be abutted against one end face 212 of the arc-shaped groove 21, the connecting rod 3 and the insulating shell 1 rotate synchronously, and the threaded connection process is achieved. After being connected insulating pull rod with move the conducting rod, when the angle of switching pole was adjusted to needs, antiport insulating casing 1, salient piece 311 rotates along arc wall 21 this moment, produce relative rotation between connecting rod 2 and the insulating casing 1 promptly, avoided connecting rod 2 to rotate along with insulating casing 1, when guaranteeing insulating pull rod and seal the stable connection between the utmost point post admittedly, the angle of switching pole can be adjusted again, be convenient for insulating pull rod and other structural connection of circuit breaker inside, the practicality has been improved.

Specifically, the elastic member 4 may be a disc spring, a cylindrical helical compression spring, a rectangular spring, or the like. In this embodiment, the elastic member 4 is a cylindrical helical compression spring, and the first end of the connecting rod 3 extends into the elastic member 4. The first end of the connecting rod 3 is arranged downwards in fig. 1 and the second end is arranged upwards in fig. 1.

In the present embodiment, the arc-shaped groove 21 penetrates through a first end surface of the nut 2 disposed toward the bottom surface of the receiving groove 111, and a groove wall of an end of the arc-shaped groove 21 opposite to the first end surface of the nut 2 forms the stop surface 211. The structure arrangement is convenient for the connecting rod 3 and the nut 2 to be installed, and can form the stop surface 211 to prevent the connecting rod 3 from moving along the axial direction due to the compression of the elastic piece 4. Specifically, in fig. 1, the upper end surface of the nut 2 is a first end surface, and the lower end surface is a second end surface.

Further, the inside wall of nut 2 is equipped with the ring channel along the circumference ring, offers arc groove 21 on the groove lateral wall of ring channel, and the bulge loop is equipped with bulge loop 31 on the lateral wall of connecting rod 3, and bulge loop 31 is arranged in the ring channel, and the protrusion sets up salient piece 311 on the lateral wall of bulge loop 31. Set up the ring channel and the bulge loop 31 of mutually supporting, prevent that elastic component 4 from promoting connecting rod 3 along the axial, increased the butt area between nut 2 and the connecting rod 3, reduced the risk of bulge 311 fracture damage, guaranteed the incorruptibility of insulating pull rod.

Specifically, the central angle of the arc-shaped groove 21 is 90 ° to 220 °. In other embodiments, the range of central angles may be adaptively chosen.

In this embodiment, the annular groove extends through the first end surface, further facilitating the mounting of the tie rod 3 and the nut 2.

Preferably, the second end surface of the nut 2 is provided with an operation hole 22, that is, the operation hole 22 is provided on the end surface of the nut 2 facing the outside of the accommodating groove 11. The operation hole 22 is arranged, so that the mounting nut 2 can be conveniently screwed by using a tool, and the convenience in disassembly and assembly is improved.

In the present embodiment, the two operation holes 22 are provided at intervals in the circumferential direction, which increases the connection area between the installation tool and the nut 2 and reduces the possibility of damaging the nut 2.

Further, the edge of the second end face of the nut 2 is opened with a riveting opening 23, that is, the riveting opening 23 is opened on the end face of the nut 2 facing the outside of the accommodating groove 11. After the nut 2 is installed on the insulating shell 1, a rivet can be riveted in the riveting opening 23, so that the nut 2 and the insulating shell 1 can be firmly fixed, and when the insulating shell 1 is rotated to adjust the position of the adapter rod, the insulating shell 1 and the nut 2 are prevented from being separated, and the reliability of the structure is guaranteed. In the present embodiment, the caulking openings 23 are opened three by three at intervals in the circumferential direction.

Preferably, the insulation case 1 includes a cylinder 11 and an injection-molded housing 12, wherein the cylinder 11 forms a receiving groove 111 therein, and the injection-molded housing 12 covers the cylinder 11. The cylinder body 11 is arranged in the injection molding shell 12, so that the overall structural strength of the insulating shell 1 is improved, and the durability and reliability of the insulating pull rod are guaranteed.

In this embodiment, the cylinder 11 is cylindrical, and has a hollow interior forming a receiving groove 111, one end of which is sealed and the other end of which is open, and the connecting rod 3 extends out of the insulating housing 1 through the opening. And one end of the elastic piece 4 far away from the connecting rod 3 is abutted against the blocking end of the cylinder body 11. In this embodiment, the cylinder 11 is made of metal, and includes a cylinder portion and a sealing plate, where the cylinder portion and the sealing plate may be connected by welding or directly covered and fixed by the injection molding housing 12. The material of the injection molding housing 12 is PA66+ 20-50% GF, which is the prior art and will not be described herein again.

Specifically, elastic component 4 and shrouding butt, and be provided with packing ring 6 between elastic component 4 and the shrouding, can adjust the compression volume of elastic component 4 through packing ring 6, can adjust the magnitude of the elastic force that elastic component 4 provided to connecting rod 3 according to actual demand, enlarged application scope. In the present embodiment, the number and height dimensions of the washers 6 are not limited.

Further, a limiting ring groove 1111 is formed in the groove wall of the accommodating groove 111, the limiting ring groove 1111 penetrates through the opening end of the barrel body 11, internal threads are formed in the side wall of the limiting ring groove 1111, and the nut 2 is arranged in the limiting ring groove 1111 and is in threaded connection with the barrel body 11 through the internal threads. This kind of setting up simple structure, the dismouting between nut 2 and the insulating casing 1 of being convenient for, and the structural strength of barrel 1 is superior to the shell 12 of moulding plastics, is connected nut 2 and barrel 11, has improved the reliability of being connected between nut 2 and the insulating casing 1.

Preferably, a barrel retaining ring groove 112 is formed in the outer side wall of the barrel 11 along the circumferential direction. The barrel anti-drop ring groove 112 is arranged, so that the contact area between the barrel 11 and the injection molding shell 12 is increased, the reliability of connection between the barrel 11 and the injection molding shell 12 is ensured, the barrel 11 is prevented from being separated from the insulating shell 1, and the durability of the insulating pull rod is ensured.

In this embodiment, two barrel retaining ring grooves 112 are provided at intervals in the axial direction of the barrel 11, which further increases the contact area between the barrel 11 and the injection-molded housing 12.

Further, the outer side wall of the injection molding housing 12 is convexly provided with a convex ring part 121, and the convex ring part 121 is provided in plurality along the axial direction of the cylinder 11. The structural arrangement is beneficial to increasing the creepage distance of the injection molding shell 12, improves the insulating property of the insulating shell 1 and improves the safety.

Preferably, the insulating pull rod further comprises a connecting piece 5, the connecting piece 5 is embedded in the second end of the insulating shell 1, a threaded hole 51 is formed in the connecting piece 5, the threaded hole 51 penetrates through the end face of the second end of the insulating shell 1, and the threaded hole 51 is in threaded connection with the adapter rod. Set up connecting piece 5, and connecting piece 5 and switching pole threaded connection, the switching pole of being convenient for is installed on insulating casing 1, has improved the installation convenience of switching pole. In the present embodiment, the threaded hole 51 is provided coaxially with the cylinder 11.

Further, a connecting piece retaining ring groove 52 is formed in the side wall of the connecting piece 5 along the circumferential direction. Set up connecting piece anticreep annular 52, increased the area of contact between connecting piece 5 and the shell 12 of moulding plastics, guaranteed the reliability of being connected between connecting piece 5 and the shell 12 of moulding plastics, prevent that connecting piece 5 and insulating casing 1 from breaking away from, guaranteed the durability of insulating pull rod.

In the present embodiment, two connector retaining ring grooves 52 are provided at intervals in the axial direction of the threaded hole 51, which further increases the contact area between the connector 5 and the injection-molded housing 12.

The embodiment also provides a circuit breaker. In particular, the circuit breaker comprises an embedded pole comprising a moving conductive rod, with which the second end of the connecting rod 3 is screwed, and an insulating pull rod as described in the foregoing.

The circuit breaker provided by the embodiment comprises the solid-sealed polar pole and the insulating pull rod. When the insulating pull rod is rotated to be in threaded connection with the movable conducting rod of the solid-sealed polar pole, the insulating shell 1 is rotated, the nut 2 and the insulating shell 1 are synchronously rotated, the convex block 311 on the connecting rod 3 can be abutted against one end face of the arc-shaped groove 21, so that the connecting rod 3 and the insulating shell 1 are synchronously rotated, and the threaded connection process is realized. After being connected insulating pull rod with move the conducting rod, when the angle of switching pole was adjusted to needs, antiport insulating casing 1, the protruding piece 31 rotates along arc wall 21 this moment, produce relative rotation between connecting rod 3 and the insulating casing 1 promptly, avoided connecting rod 3 to rotate along with insulating casing 1, when guaranteeing insulating pull rod and seal the stable connection between the utmost point post admittedly, the angle of switching pole can be adjusted again, be convenient for insulating pull rod and other structural connection of circuit breaker inside, the practicality has been improved.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. An insulated draw bar, comprising:

the insulation shell (1), wherein a containing groove (111) is formed in the first end of the insulation shell (1);

the nut (2) is arranged at the opening of the accommodating groove (111) and is connected with the insulating shell (1), and an arc-shaped groove (21) is formed in the inner side wall of the nut (2) along the circumferential direction;

the first end of the connecting rod (3) is arranged in the accommodating groove (111), the second end, far away from the first end, of the connecting rod (3) is provided with an external thread and penetrates through the nut (2) to extend out of the insulating shell (1), a protruding block (311) is arranged on the side wall of the connecting rod (3) in a protruding mode, the protruding block (311) is located in the arc-shaped groove (21), and the protruding block (311) can rotate along the arc-shaped groove (21) and is abutted to two end faces (212) of the arc-shaped groove (21) along the circumferential direction;

the elastic piece (4) is arranged in the accommodating groove (111), one end of the elastic piece (4) is abutted against the bottom surface of the accommodating groove (111), and the other end of the elastic piece (4) is abutted against the connecting rod (3);

one end of the adapter rod is connected with the second end, far away from the first end, of the insulating shell (1), and the other end of the adapter rod is provided with a through hole.

2. The insulating pull rod of claim 1, wherein the inner side wall of the nut (2) is circumferentially provided with an annular groove, the side wall of the annular groove is provided with the arc-shaped groove (21), the side wall of the connecting rod (3) is provided with a convex ring (31) in a protruding way, the convex ring (31) is arranged in the annular groove, and the outer side wall of the convex ring (31) is provided with the convex block (311) in a protruding way.

3. The insulated draw rod according to claim 1, characterized in that the insulating casing (1) comprises a cylinder (11) and an injection molded outer casing (12), the receiving groove (111) is formed inside the cylinder (11), and the injection molded outer casing (12) is wrapped outside the cylinder (11).

4. The insulation pull rod of claim 3, wherein a limiting ring groove (1111) is formed on a groove wall of the accommodating groove (111), the limiting ring groove (1111) penetrates through the open end of the barrel body (11), an internal thread is formed on a side wall of the limiting ring groove (1111), and the nut (2) is placed in the limiting ring groove (1111) and is in threaded connection with the barrel body (11) through the internal thread.

5. The insulation pull rod according to claim 3, characterized in that the outer side wall of the cylinder (11) is provided with a cylinder anti-drop ring groove (112) along the circumferential direction.

6. The insulating pull rod of claim 1, further comprising a connecting member (5), wherein the connecting member (5) is embedded in the second end of the insulating shell (1), a threaded hole (51) is formed in the connecting member (5), the threaded hole (51) penetrates through the end face of the second end of the insulating shell (1), and the threaded hole (51) is in threaded connection with the adapter rod.

7. The insulation pull rod according to claim 6, characterized in that the side wall of the connecting piece (5) is provided with a connecting piece anti-falling ring groove (52) along the circumferential direction.

8. The insulating draw bar of claim 1, characterized in that the nut (2) has an operating hole (22) cut in its end face facing the outside of the receiving groove (111).

9. Insulating tie rod according to claim 1, characterized in that the edge of the end face of the nut (2) facing towards the outside of the receiving groove (111) is provided with a riveted opening (23).

10. A circuit breaker, characterized in that it comprises an embedded pole and an insulating tie rod according to any one of claims 1 to 9, said embedded pole comprising a moving conductive rod, the second end of said connecting rod (3) being screwed to said moving conductive rod.

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