A circuit breaker manual energy storage structure and circuit breaker

Abstract

The application provides a circuit breaker manual energy storage structure which comprises a side plate, a rotating shaft, a first pawl, a ratchet wheel, a second pawl and a handle, the first pawl, the ratchet wheel, the second pawl and the handle are sequentially sleeved on the rotating shaft, the first pawl is movably installed on the side plate in the axial direction of the rotating shaft, the first pawl and the second pawl are symmetrically installed on the two sides of the ratchet wheel, the second pawl is movably installed on the handle in the axial direction of the rotating shaft, and the ratchet wheel can drive the rotating shaft to rotate. The traditional radial pawl is improved into an end face shape, the structural strength of the manual energy storage mechanism is improved, and the failure caused by fatigue damage of the tension spring is reduced by improving the existing tension spring structure.

Description

Technical Field

[0001] The invention belongs to the technical field of low-voltage electrical equipment, and in particular relates to a manual energy storage structure of a circuit breaker operating mechanism. Background Art

[0002] There are two energy storage methods for the operating mechanism of the circuit breaker, namely manual energy storage and electric energy storage. Generally, it includes a ratchet installed on the rotating shaft. The protrusion in the inner hole of the ratchet cooperates with the rotating shaft of the mechanism, so that the ratchet can rotate with the rotating shaft. At the same time, a pawl is installed on the mechanism to prevent the rotating shaft from reversing. A pawl is installed on the handle. The pawl is fixed to the cover of the handle. The pawl maintains contact with the ratchet through a tension spring to realize the unidirectional rotation of the ratchet. During the energy storage operation, the pawl and the ratchet only have a single gear in contact. When subjected to a large storage torque, the handle cover is easily deformed. At the same time, after the tension spring has worked continuously for many times, fatigue damage is prone to occur at the connections at both ends, causing the handle to fail. Summary of the Invention

[0003] In view of the problems existing in the prior art, the present invention aims to provide a manual energy storage structure for a circuit breaker which has a reliable and stable structure and a long service life.

[0004] To achieve the above-mentioned objectives, the manual energy storage structure of the circuit breaker of the present invention includes a side plate, a rotating shaft, a first pawl, a ratchet, a second pawl and a handle, wherein the first pawl, ratchet, second pawl and handle are sequentially mounted on the rotating shaft, the first pawl is mounted on the side plate in a manner that is axially movable along the rotating shaft, the first pawl and the second pawl are symmetrically mounted on both sides of the ratchet, the second pawl is mounted on the handle in a manner that is axially movable along the rotating shaft, and the ratchet can drive the rotating shaft to rotate.

[0005] A spring component is provided between the first pawl and the side plate, and a spring component is provided between the second pawl and the handle.

[0006] The ratchet is a bilaterally symmetrical structure, and is provided with a fan-shaped hole, a first tooth and a second tooth. The first tooth and the second tooth are evenly distributed on the outer circumference of the ratchet, and the fan-shaped hole cooperates with the rotating shaft.

[0007] The width of the first teeth is smaller than the width of the second teeth.

[0008] The number of the first teeth is seven, and the number of the second teeth is one.

[0009] The first pawl is provided with a first mounting hole, a first groove, a second groove and a second mounting hole. The first pawl is mounted on the side plate through the first mounting hole in a manner that it can move axially along the rotating shaft. The first groove and the second groove are evenly distributed on the outer periphery of the first pawl, and the second mounting hole is used to insert the rotating shaft.

[0010] The width of the first groove is the same as that of the second tooth, the width of the second groove is smaller than that of the second tooth, the number of the first grooves is the same as that of the first teeth, and the number of the second grooves is the same as that of the second teeth.

[0011] The first pawl and the second pawl have the same structure.

[0012] Another object of the present invention is to provide a circuit breaker including the above-mentioned manual energy storage structure. Compared with the prior art, the circuit breaker manual energy storage structure of the present invention has the following technical effects:

[0013] 1) By improving the original ratchet and pawl structure, the traditional radial pawl is modified into an end-face shape, thereby improving the structural strength of the manual energy storage mechanism. At the same time, by improving the existing tension spring structure, the failure of the tension spring due to fatigue damage is reduced;

[0014] 2) A mutually exclusive structure is provided on the end faces of the ratchet and the second pawl. After the mechanism completes the energy storage operation, the ratchet and the second pawl are separated through the contact of the two mutually exclusive structures, so that the handle can rotate freely. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the explosion structure of a manual energy storage structure in a specific embodiment of the present invention;

[0016] Figure 2 is a schematic diagram of the three-dimensional structure of a pawl in a specific embodiment of the present invention;

[0017] Figure 3 is a schematic diagram of the main structure of a pawl in a specific embodiment of the present invention;

[0018] Figure 4 Schematic diagram of the structure of a ratchet in a specific embodiment of the present invention;

[0019] Serial number:

[0020] 1-side plate, 2-rotating shaft, 3-first spring, 4-first pawl, 41-first mounting hole, 42-first groove, 43-second groove, 44-second mounting hole, 5-ratchet, 51-first tooth, 52-second tooth, 53-fan-shaped hole, 6-second pawl, 7-second spring, 8-handle. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] like Figure 1 As shown, a manual energy storage structure in a specific embodiment of the present invention includes a side plate 1, a rotating shaft 2, a first pawl 4, a ratchet 5, a second pawl 6, and a handle 8. The first pawl 4, the ratchet 5, the second pawl 6, and the handle 8 are sequentially mounted on the rotating shaft 2. The first pawl 4 is mounted on the side plate 1 so as to be movable along the axial direction of the rotating shaft. The first pawl 4 and the second pawl 6 are symmetrically mounted on either side of the ratchet 5. The second pawl 6 is mounted on the handle 8 so as to be movable along the axial direction of the rotating shaft. The ratchet 5 can drive the rotating shaft 2 to rotate.

[0023] A first spring 3 is placed between the first pawl 4 and the side plate 1, so that the end face of the first pawl 4 contacts the end face of the ratchet 5; a second spring 7 is placed between the second pawl 6 and the handle 8, so that the end face of the second pawl 6 contacts the end face of the ratchet 5.

[0024] like Figure 3 and Figure 4 As shown, the ratchet 5 in this embodiment has a bilaterally symmetrical structure. The ratchet 5 is provided with a fan-shaped hole 53, a first tooth 51 and a second tooth 52. The first teeth 51 and the second teeth 52 are evenly distributed on the outer periphery of the ratchet 5, and the fan-shaped hole 53 cooperates with the rotating shaft 2. In this embodiment, the number of first teeth 51 is seven, and the number of second teeth 52 is one. The width of the first tooth 51 is smaller than the width of the second tooth 52. The teeth on one side of the ratchet 5 cooperate with the first pawl 4, and the teeth on the other side of the ratchet 5 cooperate with the second pawl 6. Preferably, seven first teeth 51 and one second tooth 52 are provided on the ratchet 5 in this embodiment. The first teeth 51 and the second teeth 52 in this embodiment are fan-shaped.

[0025] like Figure 2As shown, the first pawl 4 in this embodiment is provided with a first mounting hole 41, a first groove 42, a second groove 43, and a second mounting hole 44. The first pawl 4 is mounted on the side plate 1 via the second mounting hole 44 so as to be axially movable along the rotating shaft 2. The first grooves 42 and the second grooves 43 are evenly distributed on the outer periphery of the first pawl 4, and the second mounting hole 44 is used to insert the rotating shaft 2. In the present invention, the width of the first groove 42 on the first pawl 4 is equal to the width of the first tooth 51 on the ratchet 5, and the width of the second groove 43 on the first pawl 4 is less than the width of the second tooth 52 on the ratchet 5. The number of second grooves 43 on the first pawl 4 is the same as the number of second teeth 52 on the ratchet 5, and the number of first grooves 42 on the first pawl 4 is the same as the number of first teeth 51 on the ratchet 5. In this embodiment, the first grooves 42 and the second grooves 43 are fan-shaped. In this embodiment, the first pawl 4 is provided with three first mounting holes 41, which are evenly distributed along the circumferential direction. During installation, the three first mounting holes 41 of the first pawl 4 are correspondingly fitted onto the three cylinders on the side plate 1. A groove is provided at the outer end of the cylinder, and the first pawl 4 is restrained on the cylinder by an open slot so that it can move axially along the rotating shaft 2. Similarly, the three first mounting holes of the second pawl 6 are correspondingly fitted onto the three cylinders of the handle 8. A groove is provided at the outer end of the cylinder, and the second pawl 6 is restrained on the cylinder by an open slot so that it can move axially along the rotating shaft 2. The first pawl 4 and the second pawl 6 in the present invention have the same structure. After the mechanism completes energy storage, the second tooth of the ratchet 5 contacts the second groove of the second pawl 6, causing the end faces to separate, thereby allowing the handle 8 to rotate freely around the rotating shaft 2. The present invention provides mutually exclusive structures on the end faces of the ratchet 5 and the second pawl 6. After the mechanism completes the energy storage operation, the ratchet 5 and the second pawl 6 are separated through the contact of the two mutually exclusive structures, so that the handle 8 can rotate freely.

[0026] The manual energy storage structure of this embodiment ultimately drives the mechanism shaft 2 to rotate by cooperating between the fan-shaped groove on the end face of the second pawl 6 and the fan-shaped teeth on the end face of the ratchet 5, and limits the rotation of the shaft 2 by cooperating between the fan-shaped groove on the end face of the first pawl 4 and the end face of the ratchet 5.

[0027] The working principle of the manual energy storage structure of the present invention is: the torque is transferred to the second pawl 6 by rotating the handle 8, and the second pawl 6 engages with the ratchet 5 under the action of the spring force of the second spring 7, so that the ratchet 5 drives the rotating shaft 2 to rotate. After rotating to a certain angle, the handle 8 is reset. At this time, the first pawl 4 engages with the ratchet 5 under the action of the spring force of the first spring 3, locking the rotating shaft 2; then the handle 8 can perform a second energy storage. After the handle 8 is fully energy-stored, the second tooth on the end face of the ratchet 5 pushes the second pawl 6 away, so that the ratchet 5 and the second pawl 6 are disengaged, and the handle 8 is released, finally completing the manual energy storage of the mechanism.

[0028] The circuit breaker of the present invention comprises an operating mechanism, a side plate and the above-mentioned manual energy storage structure. The manual energy storage structure is installed on one side of the side plate, and the operating mechanism is installed on the other side of the side plate.

[0029] Specific examples are used in the present invention to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A manual energy storage structure for a circuit breaker, characterized in that: The invention comprises a side plate, a rotating shaft, a first pawl, a ratchet, a second pawl and a handle, wherein the first pawl, the ratchet, the second pawl and the handle are sequentially mounted on the rotating shaft, the first pawl is mounted on the side plate in a manner that it can move axially along the rotating shaft, the first pawl and the second pawl are symmetrically mounted on both sides of the ratchet, the second pawl is mounted on the handle in a manner that it can move axially along the rotating shaft, and the ratchet can drive the rotating shaft to rotate; A first spring is provided between the first pawl and the side plate, and a second spring is provided between the second pawl and the handle; The ratchet is a bilaterally symmetrical structure, and is provided with a fan-shaped hole, a first tooth, and a second tooth. The first tooth and the second tooth are evenly distributed on the outer circumference of the ratchet, and the fan-shaped hole cooperates with the rotating shaft. The first pawl is provided with a first mounting hole, a first groove, a second groove, and a second mounting hole. The first pawl is mounted on the side plate through the first mounting hole in a manner that it can move axially along the rotating shaft. The first groove and the second groove are evenly distributed on the outer circumference of the first pawl. The second mounting hole is used to insert the rotating shaft. The width of the first groove is the same as that of the second tooth, the width of the second groove is smaller than that of the second tooth, the number of the first grooves is the same as that of the first teeth, and the number of the second grooves is the same as that of the second teeth.

2. The manual energy storage structure for circuit breaker according to claim 1, characterized in that: The first spring and the second spring are compression springs.

3. The manual energy storage structure of the circuit breaker according to claim 1, characterized in that: The width of the first teeth is smaller than the width of the second teeth.

4. The manual energy storage structure for circuit breaker according to claim 3, characterized in that: The number of the first teeth is seven, and the number of the second teeth is one.

5. The manual energy storage structure for circuit breaker according to claim 1, characterized in that: The first pawl and the second pawl have the same structure.

6. A circuit breaker, characterized in that: The manual energy storage structure for a circuit breaker comprises the structure described in any one of claims 1 to 5.

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