Connecting rod assembly for low voltage circuit breaker

Abstract

The present invention discloses a connecting rod assembly for a low-voltage circuit breaker, comprising a connecting rod and a locking hook, wherein one end of the locking hook is sleeved on the outside of the connecting rod and is rotatably connected to the connecting rod, the other end of the locking hook is provided with a hook connection portion, a circumferential limiting structure is provided between the locking hook and the connecting rod, the two ends of the connecting rod are respectively used to be inserted into the two side walls of a bracket located inside the low-voltage circuit breaker, the two ends of the connecting rod are welded and fixed to the bracket located inside the low-voltage circuit breaker, the outside of the connecting rod is sleeved with a torsion spring for driving the locking hook to rotate and reset, one end of the torsion spring is connected to the outer edge of one end of the locking hook, an adjusting mechanism is provided on the connecting rod, the other end of the torsion spring is connected to the adjusting end of the adjusting mechanism, and the adjusting mechanism is used to adjust the torsion force of the torsion spring; through the setting of the adjusting mechanism, when the torsion spring has insufficient torque due to fatigue, the torsion force of the torsion spring can be adjusted by the adjusting mechanism, that is, under the action of the adjusting mechanism, the torsion force of the torsion spring can be adjusted to an appropriate state.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage circuit breakers, and in particular to a connecting rod assembly for a low-voltage circuit breaker. Background Art

[0002] The low-voltage circuit breaker is an electrical device for controlling the on and off of a circuit. A connecting rod assembly is installed in the low-voltage circuit breaker, and the connecting rod assembly includes a connecting rod and a locking hook. One end of the locking hook is sleeved on the outside of the connecting rod and is rotatably connected to the connecting rod. The other end of the locking hook is provided with a hook portion for cooperating with the locking end of the energy storage mechanism located in the low-voltage circuit breaker. A circumferential limiting structure is provided between the locking hook and the connecting rod. The two ends of the connecting rod are respectively used to be inserted into the two side walls of the bracket located inside the low-voltage circuit breaker and fixed to the bracket. The outside of the connecting rod is sleeved with a torsion spring for driving the locking hook to rotate and reset. One end of the torsion spring is connected to the outer edge of one end of the locking hook, and the other end of the torsion spring is fixed to the connecting rod. When the energy storage mechanism in the low-voltage circuit breaker stores energy, the locking hook can be retracted under the torsion of the torsion spring. The hook portion cooperates with the locking end of the energy storage mechanism to hook together, so that the energy storage mechanism can be locked. When the reset mechanism in the low-voltage circuit breaker pushes the lock hook to rotate so that the hook portion on the lock hook disengages from the energy storage mechanism (when the lock hook is pushed by the reset mechanism, the lock hook can overcome the torsion force of the torsion spring to rotate), the energy storage mechanism can be reset. In addition, when the reset mechanism in the low-voltage circuit breaker releases the push on the lock hook, the lock hook can rotate and reset under the drive of the torsion spring; however, during the long-term use of the low-voltage circuit breaker, the torsion spring is prone to insufficient torque due to fatigue. As a result, the torsion spring will not be able to reliably drive the lock hook to rotate and reset, thereby affecting the reliable hooking of the hook portion of the lock hook with the locking end in the energy storage mechanism when the energy storage mechanism is storing energy. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention provides a connecting rod assembly for a low-voltage circuit breaker, which can adjust the torsion of a torsion spring, thereby adjusting the torsion of the torsion spring to a suitable state.

[0004] The connecting rod assembly for a low-voltage circuit breaker of the present invention includes a connecting rod and a locking hook, one end of the locking hook is sleeved on the outside of the connecting rod and is rotatably connected to the connecting rod, the other end of the locking hook is provided with a hooking portion for cooperating and hooking with the locking end of an energy storage mechanism located in the low-voltage circuit breaker, a circumferential limiting structure is provided between the locking hook and the connecting rod, the two ends of the connecting rod are respectively used to be inserted into the two side walls of the bracket located inside the low-voltage circuit breaker, the two ends of the connecting rod are welded and fixed to the bracket located inside the low-voltage circuit breaker, the outside of the connecting rod is sleeved with a torsion spring for driving the locking hook to rotate and reset, one end of the torsion spring is connected to the outer edge of one end of the locking hook, an adjusting mechanism is provided on the connecting rod, the other end of the torsion spring is connected to the adjusting end of the adjusting mechanism, and the adjusting mechanism is used to adjust the torsion of the torsion spring.

[0005] The gear train is connected to the transmission gear of the present invention, and the gear train is connected with the transmission gear of the present invention through the through hole, and the gear train is connected with the transmission gear of the present invention through the through hole. When the cam is in a closed position, the gear is engaged with the gear and the cam is engaged with the gear, and the cam is engaged with the gear, and the cam is engaged with the gear, and the cam is engaged with the gear, and the cam is engaged with the gear, and the cam is engaged with the gear, and the cam is engaged with the gear, and the cam is engaged with the gear, and the cam is engaged with the gear, and the cam is engaged with the gear, and the cam is engaged with the gear, and the cam is engaged with the gear, and the cam is engaged with the gear, and the cam is engaged with the gear, and the cam is engaged with the gear, and the cam is engaged with the gear, and the cam is engaged with the gear, and the cam is engaged with the gear, and the cam is engaged with the gear,

[0006] The connecting rod assembly for a low-voltage circuit breaker of the present invention comprises a locking structure including a bolt, a countersunk hole is provided in the connecting rod, the axis of the countersunk hole is perpendicular to the axis of the connecting rod, the inner end of the countersunk hole is connected to the through hole, the countersunk hole is located at the outer end of the through hole, the bolt is threadedly connected in the countersunk hole, and the inner end of the bolt is pressed against the outer wall of the rotating rod; by adopting this locking structure, when the rotating rod is rotated, the rotating rod can be tightened by twisting the bolt, so that the locking and locking of the rotating rod can be achieved reliably and conveniently.

[0007] The connecting rod assembly for a low-voltage circuit breaker of the present invention has a bearing embedded between the rotating sleeve and the connecting rod, the inner circumferential wall of the inner ring of the bearing is tightly fitted with the outer circumferential wall of the connecting rod, and the outer circumferential wall of the outer ring of the bearing is tightly fitted with the inner circumferential wall of the rotating sleeve; through the arrangement of the bearing, the rotating sleeve can be reliably connected to the connecting rod for rotation.

[0008] The connecting rod assembly for a low-voltage circuit breaker of the present invention has an annular boss integrally formed on the outer peripheral wall of the connecting rod, the annular boss is located on one side of the bearing and abuts against the inner ring of the bearing; an annular step is formed between the annular flange and the rotating sleeve, the annular step is located on the other side of the bearing and abuts against the outer ring of the bearing; by adopting this structure, the bearing and the connecting rod can be limited, and the rotating sleeve and the bearing can also achieve a limiting function.

[0009] The connecting rod assembly for a low-voltage circuit breaker of the present invention is characterized in that an annular groove is provided on the outer peripheral wall of the connecting rod, and a retaining spring is engaged with the annular groove, and the retaining spring abuts against the side of the annular convex edge away from the rotating sleeve; through the provision of the retaining spring, the retaining spring can abut against the annular convex edge, so that the retaining spring can limit the annular convex edge and the rotating sleeve to prevent the rotating sleeve from being separated from the bearing; in addition, under the cooperative action of the annular boss and the retaining spring, axial limitation of the bearing and the rotating sleeve can be achieved.

[0010] The connecting rod assembly for a low-voltage circuit breaker of the present invention comprises a first insertion hole provided at the outer edge of one side of a rotating sleeve, into which the other end of a torsion spring is inserted; a second insertion hole is provided at the outer edge of one end of a locking hook, into which one end of a torsion spring is inserted; by adopting this structure, the two ends of the torsion spring can be reliably and conveniently connected to the rotating sleeve and the locking hook, respectively; in addition, the other end of the torsion spring is tightly fitted with the first insertion hole, and one end of the torsion spring is tightly fitted with the second insertion hole.

[0011] The connecting rod assembly for a low-voltage circuit breaker of the present invention comprises a keyway provided on the outer wall of one end of a rotating rod, an axial hole provided in the middle of a gear, a flat surface provided on the inner wall of the axial hole, one end of the rotating rod being inserted into the axial hole, and the keyway being engaged with the flat surface. By adopting this structure, after one end of the rotating rod is inserted into the axial hole on the gear, the keyway can be engaged with the flat surface, thereby realizing a circumferential limit function between the bearing and the rotating rod, i.e., when the rotating rod rotates, the rotating rod can reliably drive the gear to rotate, i.e., the phenomenon of the gear rotating relative to the rotating rod can be avoided.

[0012] The connecting rod assembly for a low-voltage circuit breaker of the present invention, wherein the circumferential limit structure includes an arcuate groove provided on the outer wall of the connecting rod, a pin hole provided on the side wall of one end of the lock hook, a limit pin inserted in the pin hole, the limit pin tightly fits with the pin hole, and the inner end portion of the limit pin is inserted into the arcuate groove and slidably connected to the arcuate groove; by adopting this structure, when the lock hook rotates relative to the connecting rod, the inner end portion of the limit pin can slide in the arcuate groove, in other words, the inner end portion of the limit pin can only slide in the arcuate groove, so that the purpose of circumferential limit can be achieved between the lock hook and the connecting rod, that is, the rotation angle of the lock hook relative to the connecting rod can be controlled.

[0013] In the connecting rod assembly for a low-voltage circuit breaker of the present invention, the inner end portion of the limit pin is a dome-shaped structure. By adopting this structure, when the inner end portion of the limit pin slides in the arc-shaped groove, the friction between the limit pin and the arc-shaped groove can be reduced. In this way, when the lock hook rotates relative to the connecting rod, the inner end portion of the limit pin can slide more smoothly in the arc-shaped groove.

[0014] The present invention provides an adjustment mechanism. When the torsion spring has insufficient torque due to fatigue, the torsion force of the torsion spring can be adjusted by the adjustment mechanism. That is, the torsion force of the torsion spring can be adjusted to a suitable state under the action of the adjustment mechanism. In this way, when the energy storage mechanism in the low-voltage circuit breaker stores energy, it can ensure that the hooking portion of the lock hook is reliably hooked with the locking end in the energy storage mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 It is a schematic cross-sectional view of the present invention;

[0017] Figure 2 for Figure 1 The schematic diagram of the structure after enlarging at A in the middle;

[0018] Figure 3 for Figure 1 The schematic diagram of the structure after enlarging at B in the middle;

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure after the lock hook and the connecting rod are assembled;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure after the lock hook and connecting rod are separated;

[0021] Figure 6 This is a schematic cross-sectional view of the assembled lock hook and connecting rod;

[0022] Figure 7 It is a schematic diagram of the left-side structure of the gear;

[0023] Figure 8 It is a schematic diagram of the left view of the rotating rod. DETAILED DESCRIPTION

[0024] The following diagrams illustrate various embodiments of the present invention. For clarity, many practical details are included in the following description. However, it should be understood that these practical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not essential. Furthermore, to simplify the drawings, some commonly used structures and components are depicted in simplified schematic form.

[0025] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] The connecting rod assembly for a low-voltage circuit breaker of the present invention includes a connecting rod 1 and a locking hook 2. One end of the locking hook 2 is sleeved on the outside of the connecting rod 1 and is rotatably connected to the connecting rod 1. The other end of the locking hook 2 is provided with a hooking portion 21 for cooperating with the locking end of the energy storage mechanism located in the low-voltage circuit breaker. A circumferential limiting structure is provided between the locking hook 2 and the connecting rod 1. The two ends of the connecting rod 1 are respectively used to be inserted into the two side walls of the bracket located inside the low-voltage circuit breaker. Both ends of the connecting rod 1 are welded and fixed to the bracket located inside the low-voltage circuit breaker. The outside of the connecting rod 1 is sleeved with a torsion spring 3 for driving the locking hook 2 to rotate and reset. One end of the torsion spring 3 is connected to the outer edge of one end of the locking hook 2. An adjusting mechanism is provided on the connecting rod 1. The other end of the torsion spring 3 is connected to the adjusting end of the adjusting mechanism. The adjusting mechanism is used to adjust the torsion of the torsion spring 3.

[0027] The adjusting mechanism includes a rotating sleeve 4, a rotating rod 5 and a gear 6. The rotating sleeve 4 is sleeved on the outside of the connecting rod 1 and is rotatably connected to the connecting rod 1. The other end of the torsion spring 3 is connected to the outer edge of one side of the rotating sleeve 4. An air escape groove 11 is provided on the outer wall of the connecting rod 1. The gear 6 is provided in the air escape groove 11. A through hole 12 extending in the axial direction of the connecting rod 1 is provided in the connecting rod 1. The inner end of the through hole 12 is connected to the air escape groove 11. The outer end of the through hole 12 extends to one end of the connecting rod 1. The rotating rod 5 is provided In the through hole 12 and rotatably connected with the through hole 12, one end of the rotating rod 5 is connected to the gear 6, and the other end of the rotating rod 5 is provided with a regular hexagonal countersunk hole 51, and the other end of the rotating rod 5 extends to the outer end of the through hole 12. The rotating rod 5 and the gear 6 are coaxially arranged and used to drive the gear 6 to rotate. The other side of the rotating sleeve 4 is provided with an annular flange 41, and a gap is left between the inner circumferential wall of the annular flange 41 and the outer circumferential wall of the connecting rod 1. The inner circumferential wall of the annular flange 41 meshes with the gear 6, and the rotating rod 5 is connected to the connecting rod 1. A locking structure is provided between the rods 1; after adopting this adjustment mechanism, when the locking structure unlocks the rotating rod and when the external hexagonal wrench cooperates with the countersunk hole and rotates the rotating rod, the rotating rod can drive the gear to rotate. When the gear rotates, the gear can drive the annular flange and the rotating sleeve to rotate. When the rotating sleeve rotates, the rotating sleeve can drive one end of the torsion spring to rotate around the connecting rod. In this way, the torsion force of the torsion spring can be adjusted, that is, the torsion potential energy applied by the torsion spring to the lock hook can be adjusted. When the torsion force of the torsion spring is adjusted, the locking structure can lock the rotating rod again; in addition, after the two ends of the connecting rod are welded and fixed to the two side walls of the bracket located inside the low-voltage circuit breaker, the torsion spring will be located on the inner side of the bracket. In order to facilitate the adjustment of the torsion force of the torsion spring, the present invention drives the rotating sleeve to rotate by adopting a rotating rod and a gear, and the other end of the rotating rod extends to the outer end of the through hole. In this way, the torsion force of the torsion spring can be adjusted from the outside of the bracket, thereby facilitating the adjustment of the torsion force of the torsion spring.

[0028] The locking structure includes a bolt 7, and a countersunk hole 13 is provided in the connecting rod 1. The axis of the countersunk hole 13 is perpendicular to the axis of the connecting rod 1, and the inner end of the countersunk hole 13 is connected to the through hole 12. The countersunk hole 13 is located at the outer end of the through hole 12. The bolt 7 is threadedly connected in the countersunk hole, and the inner end of the bolt 7 is pressed against the outer wall of the rotating rod 5; by adopting this locking structure, when the rotating rod is rotated, the rotating rod can be tightened by tightening the bolt, so that the locking and locking of the rotating rod can be achieved reliably and conveniently.

[0029] A bearing 8 is embedded between the rotating sleeve 4 and the connecting rod 1. The inner circumferential wall of the inner ring of the bearing 8 is tightly fitted with the outer circumferential wall of the connecting rod 1, and the outer circumferential wall of the outer ring of the bearing 8 is tightly fitted with the inner circumferential wall of the rotating sleeve 4. Through the setting of the bearing, the rotating sleeve can be reliably connected to the connecting rod for rotation.

[0030] An annular boss 14 is integrally formed on the outer peripheral wall of the connecting rod 1, and the annular boss 14 is located on one side of the bearing 8 and abuts against the inner ring of the bearing 8; an annular step 42 is formed between the annular convex edge 41 and the rotating sleeve 4, and the annular step 42 is located on the other side of the bearing 8 and abuts against the outer ring of the bearing 8; by adopting this structure, the bearing and the connecting rod can be limited, and the rotating sleeve and the bearing can also achieve a limiting function.

[0031] An annular groove 15 is provided on the outer peripheral wall of the connecting rod 1, and a retaining spring 9 is engaged with the annular groove 15. The retaining spring 9 abuts against the side of the annular convex edge 41 away from the rotating sleeve 4; through the setting of the retaining spring, the retaining spring can abut against the annular convex edge, so that the retaining spring can limit the annular convex edge and the rotating sleeve to avoid the rotating sleeve from being separated from the bearing; in addition, under the cooperation of the annular boss and the retaining spring, the axial limitation of the bearing and the rotating sleeve can be achieved.

[0032] A first insertion hole 43 is provided at the outer edge of one side of the rotating sleeve 4, and the other end of the torsion spring 3 is inserted into the first insertion hole 43; a second insertion hole 22 is provided at the outer edge of one end of the lock hook 2, and one end of the torsion spring 3 is inserted into the second insertion hole 22; by adopting this structure, the two ends of the torsion spring can be reliably and conveniently connected to the rotating sleeve and the lock hook respectively; in addition, the other end of the torsion spring is tightly fitted with the first insertion hole, and one end of the torsion spring is tightly fitted with the second insertion hole.

[0033] A keyway 52 is provided on the outer wall of one end of the rotating rod 5, an axial hole 61 is provided in the middle of the gear 6, and a flat surface 62 is provided on the inner wall of the axial hole 61. One end of the rotating rod 5 is inserted into the axial hole 61, and the keyway 52 is engaged with the flat surface 62. By adopting this structure, after one end of the rotating rod is inserted into the axial hole on the gear, the keyway can be engaged with the flat surface. In this way, the circumferential limiting function can be achieved between the bearing and the rotating rod, that is, when the rotating rod rotates, the rotating rod can reliably drive the gear to rotate, which can also prevent the gear from rotating relative to the rotating rod.

[0034] The circumferential limiting structure includes an arcuate groove 16 arranged on the outer wall of the connecting rod 1, and a pin hole 23 is provided on the side wall of one end of the lock hook 2, and a limit pin 24 is inserted in the pin hole 23. The limit pin 24 is tightly matched with the pin hole 23, and the inner end portion of the limit pin 24 is inserted into the arcuate groove 16 and is slidably connected with the arcuate groove 16; by adopting this structure, when the lock hook rotates relative to the connecting rod, the inner end portion of the limit pin can slide in the arcuate groove. In other words, the inner end portion of the limit pin can only slide in the arcuate groove. In this way, the purpose of circumferential limiting can be achieved between the lock hook and the connecting rod, that is, the rotation angle of the lock hook relative to the connecting rod can be controlled.

[0035] The inner end portion of the limit pin 24 is a dome-shaped structure; by adopting this structure, when the inner end portion of the limit pin slides in the arc groove, the friction between the limit pin and the arc groove can be reduced, so that when the lock hook rotates relative to the connecting rod, the inner end portion of the limit pin can slide more smoothly in the arc groove.

[0036] During use of the present invention, when the torsion spring has insufficient torque due to fatigue, first loosen the bolt in the countersunk hole, then insert the end of the hexagonal wrench into the countersunk hole on the rotating rod and rotate the rotating rod. When the rotating rod rotates, the rotating rod can drive the gear to rotate. When the gear rotates, the gear can drive the annular flange and the rotating sleeve to rotate. When the rotating sleeve rotates, the rotating sleeve can drive one end of the torsion spring to rotate around the connecting rod. In this way, the torsion force of the torsion spring can be adjusted. After the torsion force of the torsion spring is adjusted to a suitable state, tighten the bolt again so that the bolt presses the rotating rod.

[0037] The foregoing is merely an embodiment of the present invention and is not intended to limit the present invention. It will be apparent to those skilled in the art that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A connecting rod assembly for a low-voltage circuit breaker, comprising a connecting rod and a locking hook, wherein one end of the locking hook is sleeved on the outside of the connecting rod and is rotatably connected to the connecting rod, the other end of the locking hook is provided with a hooking portion for cooperating and hooking with a locking end of an energy storage mechanism located in the low-voltage circuit breaker, a circumferential limiting structure is provided between the locking hook and the connecting rod, the two ends of the connecting rod are respectively used to be inserted into the two side walls of a bracket located inside the low-voltage circuit breaker, the two ends of the connecting rod are welded and fixed to the bracket located inside the low-voltage circuit breaker, the outside of the connecting rod is sleeved with a torsion spring for driving the locking hook to rotate and reset, one end of the torsion spring is connected to the outer edge of one end of the locking hook, and the characteristics are: The connecting rod is provided with an adjusting mechanism, the other end of the torsion spring is connected to the adjusting end of the adjusting mechanism, and the adjusting mechanism is used to adjust the torsion of the torsion spring; the adjusting mechanism includes a rotating sleeve, a rotating rod and a gear, the rotating sleeve is provided on the outside of the connecting rod and is rotatably connected to the connecting rod, the other end of the torsion spring is connected to the outer edge of one side of the rotating sleeve, an air avoidance groove is provided on the outer wall of the connecting rod, the gear is provided in the air avoidance groove, a through hole extending along the axial direction of the connecting rod is provided in the connecting rod, the inner end of the through hole is connected to the air avoidance groove, and the outer end of the through hole extends To one of the ends of the connecting rod, the rotating rod is arranged in the through hole and is rotatably connected to the through hole, one end of the rotating rod is connected to the gear, and the other end of the rotating rod is provided with a regular hexagonal countersunk hole, and the other end of the rotating rod extends to the outer end of the through hole, the rotating rod is coaxially arranged with the gear and is used to drive the gear to rotate, and an annular flange is provided on the other side of the rotating sleeve, and a gap is left between the inner circumferential wall of the annular flange and the outer circumferential wall of the connecting rod, the inner circumferential wall of the annular flange is meshed with the gear, and a locking structure is provided between the rotating rod and the connecting rod.

2. The connecting rod assembly for a low-voltage circuit breaker according to claim 1, characterized in that: The locking structure includes a bolt, a countersunk hole is provided in the connecting rod, the axis of the countersunk hole is perpendicular to the axis of the connecting rod, the inner end of the countersunk hole is connected to the through hole, the countersunk hole is located at the outer end of the through hole, the bolt is threadedly connected in the countersunk hole, and the inner end of the bolt is pressed against the outer wall of the rotating rod.

3. The connecting rod assembly for a low voltage circuit breaker according to claim 1, characterized in that: A bearing is embedded between the rotating sleeve and the connecting rod. The inner peripheral wall of the inner ring of the bearing is tightly matched with the outer peripheral wall of the connecting rod. The outer peripheral wall of the outer ring of the bearing is tightly matched with the inner peripheral wall of the rotating sleeve.

4. The connecting rod assembly for a low-voltage circuit breaker according to claim 3, characterized in that: An annular boss is integrally formed on the outer peripheral wall of the connecting rod, and the annular boss is located on one side of the bearing and abuts against the inner ring of the bearing; an annular step is formed between the annular convex edge and the rotating sleeve, and the annular step is located on the other side of the bearing and abuts against the outer ring of the bearing.

5. The connecting rod assembly for a low voltage circuit breaker according to claim 4, characterized in that: An annular clamping groove is provided on the outer peripheral wall of the connecting rod, and a clamping spring is fitted on the annular clamping groove. The clamping spring abuts against a side of the annular convex edge away from the rotating sleeve.

6. The connecting rod assembly for a low voltage circuit breaker according to claim 1, characterized in that: A first insertion hole is provided at the outer edge of one side of the rotating sleeve, and the other end of the torsion spring is inserted into the first insertion hole; a second insertion hole is provided at the outer edge of one end of the lock hook, and one end of the torsion spring is inserted into the second insertion hole.

7. The connecting rod assembly for a low voltage circuit breaker according to claim 1, characterized in that: A keyway is provided on the outer wall of one end of the rotating rod, an axial hole is provided in the middle of the gear, a plane is provided on the inner wall of the axial hole, one end of the rotating rod is inserted into the axial hole, and the keyway is engaged with the plane.

8. The connecting rod assembly for a low voltage circuit breaker according to claim 1, characterized in that: The circumferential limiting structure includes an arc-shaped groove arranged on the outer wall of the connecting rod, and a pin hole is provided on the side wall of one end of the locking hook. A limiting pin is inserted in the pin hole, and the limiting pin is tightly fitted with the pin hole. The inner end of the limiting pin is inserted into the arc-shaped groove and is slidably connected with the arc-shaped groove.

9. The connecting rod assembly for a low-voltage circuit breaker according to claim 8, characterized in that: The inner end portion of the limiting pin is a dome-shaped structure.

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