Actuating mechanism and circuit breaker

Abstract

The utility model provides an executing mechanism and a circuit breaker, and relates to the technical field of low-voltage electrical appliances, the executing mechanism comprises a gear set and a handle transmission part in transmission connection with the gear set, the gear set comprises a plurality of transmission gears meshed in sequence, a first transmission gear in the transmission gears comprises a first gear and a second gear which are coaxial, and a second transmission gear in the transmission gears comprises a second gear and a third gear; a first meshing part and a second meshing part are arranged on the sides, close to each other, of the first gear and the second gear respectively in the axial direction, the first meshing part and the second meshing part are meshed when the first gear and the second gear get close to each other, and the first meshing part and the second meshing part can rotate relatively when the first gear and the second gear get away from each other. According to the execution mechanism and the circuit breaker provided by the invention, the problem that in the prior art, gear sets are not easy to release after being blocked or the gear set and a handle are blocked is solved.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to an actuator and a circuit breaker. Background Art

[0002] A circuit breaker is a switching device that can open, carry and disconnect current under normal circuit conditions, and can close, carry and disconnect current under abnormal circuit conditions within a specified time. With the rapid development of my country's power and communication technology, higher and higher requirements have been put forward for the practicality, safety and reliability of terminal electrical equipment such as circuit breakers. Traditional circuit breakers are far from meeting these requirements. In the continuous research and development, circuit breakers have not only reached a new level in miniaturization, intelligence, and reliability, but also many new designs have emerged, such as smart circuit breakers. Smart circuit breakers use microcontrollers, Internet of Things technology and new detectors to establish a new circuit breaker secondary system. At present, they have been gradually applied to many aspects such as smart parks and smart electricity use.

[0003] At present, the actuator of the intelligent circuit breaker uses a motor to drive the reduction gear set in forward and reverse rotation to drive the handle to open and close the switch, wherein the reduction gear set includes multiple stages of transmission gears that mesh in sequence. Specifically, the driving shaft of the motor is connected to the reduction gear set to drive the handle to open and close the switch, and the handle is connected to the operating mechanism to drive the operating mechanism to realize the opening and closing of the circuit breaker. The actuator may get stuck during operation. When the reduction gear sets or the reduction gear set and the handle are stuck, the circuit breaker can only be disassembled to release the stuck gears, which is troublesome and time-consuming. Utility Model Content

[0004] The purpose of the present application is to provide an actuator and a circuit breaker to address the deficiencies in the above-mentioned prior art, so as to solve the problem in the prior art that the gear sets or the gear sets and the handle are difficult to release after being stuck.

[0005] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0006] In one aspect of an embodiment of the present application, an actuator is provided, comprising: a gear set and a handle transmission member transmission-connected to the gear set, the gear set comprising a plurality of transmission gears meshing in sequence, the first transmission gear among the transmission gears comprising a coaxial first gear and a second gear, a first meshing portion and a second meshing portion are respectively arranged axially on one side where the first gear and the second gear are close to each other, the first meshing portion and the second meshing portion are meshed when the first gear and the second gear are close to each other, and the first meshing portion and the second meshing portion can rotate relative to each other when the first gear and the second gear are away from each other.

[0007] As an practicable manner, the actuator also includes a housing, a gear set and a handle transmission component are arranged in the housing, an elastic component is arranged between the housing and the first gear or between the housing and the second gear, the elastic component is driven to be compressed so that the first meshing part and the second meshing part rotate relative to each other, and the elastic component recovers so that the first meshing part and the second meshing part re-engage.

[0008] As an practicable manner, the first meshing portion includes a plurality of first teeth extending toward the second gear, and the plurality of first teeth are arranged in a circle; the second meshing portion extends a plurality of second teeth toward the first gear, and the plurality of second teeth are arranged in a circle, and the plurality of first teeth and the second teeth are meshed.

[0009] As an implementable manner, the first teeth are trapezoidal teeth or triangular teeth, and the tooth grooves between two adjacent second teeth are trapezoidal grooves or triangular grooves.

[0010] As an practicable manner, the tooth top angles of the first tooth and the second tooth are less than 60°.

[0011] As an implementable manner, a groove is provided at the rotating shaft of the second gear, and the second meshing portion is provided in the groove, so that the rotating surfaces of the first gear and the second gear are in contact with each other.

[0012] As an implementable manner, a connecting shaft is arranged in the center of the first meshing portion and the second meshing portion, the axial direction of the connecting shaft is the same as the axial direction of the first meshing portion and the second meshing portion, and the connecting shaft corresponding to the first meshing portion contacts the first meshing portion.

[0013] As an implementable manner, the engagement depth of the first engagement portion and the second engagement portion is greater than 1.5 mm.

[0014] As an implementable manner, the first transmission gear is a transmission gear in the gear set connected to the handle transmission member, and the second gear is connected to the handle transmission member.

[0015] In one aspect of an embodiment of the present application, a circuit breaker is provided, comprising a motor, the above-mentioned actuator, a handle connected to a handle transmission member of the actuator, and a contact mechanism connected to the handle, wherein the motor is connected to a gear set of the actuator to drive the gear set to rotate, and the gear set drives the contact mechanism to rotate through the handle to realize the opening and closing of the circuit breaker.

[0016] The beneficial effects of this application include:

[0017] The present application provides an actuator, comprising: a gear set and a handle transmission member connected to the gear set in transmission, the gear set comprising a plurality of transmission gears meshing in sequence, a first transmission gear in the transmission gear comprising a coaxial first gear and a second gear, a first meshing portion and a second meshing portion are respectively arranged along the axial direction on the side where the first gear and the second gear are close to each other, the first meshing portion and the second meshing portion mesh when the first gear and the second gear are close to each other, when the actuator works normally, the first meshing portion meshes with the second meshing portion, and the first transmission gear plays a transmission role; when the actuator fails and the resistance increases, resulting in the gear being stuck, the first gear continues to rotate, at this time, the first meshing portion and the second meshing portion mesh, the second meshing portion prevents the first meshing portion from rotating with the first gear, the first meshing portion and the second meshing portion rotate relatively, the first gear overcomes the friction force of the first meshing portion and the second meshing portion so that the first gear and the second gear are away from each other and rotate relatively, and the jam is released, that is, the jam can be released by setting the first transmission gear as the first gear and the second gear that can rotate relatively, therefore, the actuator provided by the present application can solve the problem in the prior art that it is difficult to release after the gear sets or the gear sets and the handle are stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 One of the structural schematic diagrams of an actuator provided in an embodiment of the present application;

[0020] Figure 2 A second structural diagram of an actuator provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the structure of a first gear provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the structure of a second gear provided in an embodiment of the present application;

[0023] Figure 5 A schematic structural diagram of a first transmission gear provided in an embodiment of the present application.

[0024] Icons: 100-actuator; 110-gear set; 111-first transmission gear; 112-first gear; 113-second gear; 114-first meshing portion; 115-second meshing portion; 116-connecting shaft; 117-groove; 120-handle transmission member; 130-elastic member; 140-housing; 210-motor; 220-handle. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. It should be noted that, in the absence of conflict, the various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the scope of protection of the present application.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In one aspect of the embodiment of the present application, Figure 1 , Figure 3 and Figure 4As shown, an actuator 100 is provided, comprising: a gear set 110 and a handle transmission member 120 transmission-connected to the gear set 110, the gear set 110 comprising a plurality of transmission gears meshing in sequence, a first transmission gear 111 in the transmission gear comprising a coaxial first gear 112 and a second gear 113, a first meshing portion 114 and a second meshing portion 115 are respectively arranged axially on one side where the first gear 112 and the second gear 113 are close to each other, the first meshing portion 114 and the second meshing portion 115 are meshed when the first gear 112 and the second gear 113 are close to each other, and the first meshing portion 114 and the second meshing portion 115 rotate relatively when the first gear 112 and the second gear 113 are away from each other.

[0030] The actuator 100 provided in the embodiment of the present application is applied to an intelligent circuit breaker. The intelligent circuit breaker includes a motor 210 connected to an external control signal. The motor 210 receives the control rotation of the external control signal and drives the handle transmission member 120 to rotate through the gear set 110, thereby driving the handle 220 and the operating mechanism to open and close the intelligent circuit breaker, so as to open and close the intelligent circuit breaker and realize the control of the intelligent circuit breaker.

[0031] Specifically, the actuator 100 of the embodiment of the present application includes a plurality of transmission gears meshed in sequence and a handle transmission member 120 meshed with the last transmission gear, wherein the first transmission gear 111 among the plurality of transmission gears includes a first gear 112 and a second gear 113 coaxially arranged, wherein the first gear teeth are meshed with the previous transmission gear to rotate driven by the previous transmission gear, and the second gear 113 is meshed with the next transmission gear or the handle transmission member 120 to drive the next transmission gear or the handle transmission member 120 to rotate. The first meshing portion 114 and the second meshing portion 115 are respectively arranged on the side where the first gear 112 and the second gear 113 are close to each other, that is, the first meshing portion 114 is arranged on the side of the first gear 112 close to the second gear 113, and the second meshing portion 115 is arranged on the side of the second gear 113 close to the first gear 112. When the distance between the first gear 112 and the second gear 113 is small, the first meshing portion 114 and the second meshing portion 115 are meshed, so that the first transmission gear 111 plays a transmission role; when the distance between the first gear 112 and the second gear 113 is large, the first meshing portion 114 and the second meshing portion 115 rotate relatively. When the actuator 100 is working normally, the first meshing portion 114 is meshed with the second meshing portion 115, and the first transmission gear 111 plays a transmission role; when the actuator 100 fails and the resistance increases, causing the gear to get stuck, the first gear 112 continues to rotate. At this time, the first meshing portion 114 and the second meshing portion 115 are meshed, and the second meshing portion 115 prevents the first meshing portion 114 from rotating with the first gear 112. The first gear 112 overcomes the friction between the first meshing portion 114 and the second meshing portion 115 and rotates relatively to release the jam, that is, the jam can be released by setting the first transmission gear 111 as a first gear 112 and a second gear 113 that can rotate relatively. Therefore, the actuator 100 provided in this application can solve the problem in the prior art that the gear sets 110 or the gear sets 110 and the handle 220 are not easy to release after being jammed.

[0032] Specifically, the number of transmission gears in the gear set 110 and the number of stages of the first transmission gear 111 in the gear set 110 are not limited in the embodiment of the present application. For example, the gear set 110 includes a primary transmission gear meshed with the motor 210 and a secondary transmission gear, a tertiary transmission gear and a quaternary transmission gear meshed with the primary transmission gear in sequence, and the quaternary transmission gear meshes with the handle transmission member 120. In the implementation of the present application, the quaternary transmission gear is used as the first transmission gear 111 in the embodiment of the present application. Those skilled in the art may also use the primary transmission gear, the secondary transmission gear or the tertiary transmission gear as the first transmission gear 111 according to actual conditions.

[0033] The present application provides an actuator 100, comprising: a gear set 110 and a handle transmission member 120 connected to the gear set 110 in transmission mode. The gear set 110 comprises a plurality of transmission gears meshing in sequence. A first transmission gear 111 in the transmission gear comprises a coaxial first gear 112 and a second gear 113. A first meshing portion 114 and a second meshing portion 115 are respectively arranged on one side of the first gear 112 and the second gear 113 close to each other. When the first gear 112 and the second gear 113 are close to each other, the first meshing portion 114 and the second meshing portion 115 mesh. When the actuator 100 works normally, the first meshing portion 114 meshes with the second meshing portion 115, and the first transmission gear 111 plays a transmission role. When the actuator 100 fails, the resistance increases, causing the gears to fail. When stuck, the first gear 112 continues to rotate. At this time, the first meshing portion 114 and the second meshing portion 115 are meshed, and the second meshing portion 115 prevents the first meshing portion 114 from rotating with the first gear 112. The first meshing portion 114 and the second meshing portion 115 rotate relatively, and the first gear 112 overcomes the friction force of the first meshing portion 114 and the second meshing portion 115 so that the first gear 112 and the second gear 113 move away from each other and rotate relatively, thereby releasing the jam. That is, the jam can be released by setting the first transmission gear 111 as the first gear 112 and the second gear 113 that can rotate relatively. Therefore, the actuator 100 provided in the present application can solve the problem in the prior art that the gear sets 110 or the gear sets 110 and the handle 220 are difficult to release after being stuck.

[0034] Optional, such as Figure 2 As shown, the actuator 100 also includes a housing 140, the gear set 110 and the handle transmission member 120 are arranged in the housing 140, and an elastic member 130 is arranged between the housing 140 and the first gear 112 or the housing 140 and the second gear 113. The elastic member 130 is driven to be compressed so that the first meshing portion 114 and the second meshing portion 115 rotate relative to each other, and the elastic member 130 recovers so that the first meshing portion 114 and the second meshing portion 115 re-engage.

[0035] Specifically, an elastic member 130 is provided between the housing 140 and the second gear 113. When the actuator 100 works normally, the elastic member 130 supports the second gear 113, so that the distance between the second gear 113 and the first gear 112 is small, so that the first meshing portion 114 and the second meshing portion 115 mesh, and the transmission of the first transmission gear 111 is realized. When the actuator 100 fails and the resistance increases, resulting in the gear being stuck, the first gear 112 is driven to continue to rotate. At this time, due to the meshing of the first meshing portion 114 and the second meshing portion 115, the second meshing portion 115 hinders the first meshing portion 114 from rotating with the rotation of the first gear 112. At the same time, the elastic force of the elastic member 130 causes the second gear 113 to approach the first gear 112. When the first gear 112 continues to rotate, it needs to overcome the pressure of the elastic member 130 on the second gear 113 and the friction between the first meshing portion 114 and the second meshing portion 115 to rotate relatively and release the stuck state. After the jam is released, the elastic member 130 resumes supporting the second gear 113 , so that the first meshing portion 114 and the second meshing portion 115 are meshed again.

[0036] By providing the elastic member 130 , the first meshing portion 114 and the second meshing portion 115 mesh under the action of elastic pressure, or rotate relatively under the drive of the first gear 112 , making it more convenient to release the stuck execution structure without manual operation.

[0037] The specific structure of the elastic member 130 is not limited in the present embodiment, and can be, for example, as follows: Figure 2 The compression spring shown may also be a torsion spring or other elastic member 130 , as long as it can provide pressure for the second gear 113 to approach the first gear 112 .

[0038] When the elastic member 130 is Figure 2 When the compression spring is shown, the side surface of the second gear 113 close to the housing 140 can be recessed to form a mounting hole, and the mounting hole is used to accommodate one end of the compression spring, which can improve the stability of the compression spring.

[0039] In one possible implementation of the embodiment of the present application, Figure 3 and Figure 4 As shown, the first meshing portion 114 includes a plurality of first teeth extending toward the second gear 113, and the plurality of first teeth are arranged in a circle; the second meshing portion 115 extends a plurality of second teeth toward the first gear 112, and the plurality of second teeth are arranged in a circle, and the plurality of first teeth and the second teeth are meshed.

[0040] The first meshing portion 114 includes a plurality of first teeth, and the second meshing portion 115 includes a plurality of second teeth, and a tooth groove is formed between two first teeth. When the first meshing portion 114 and the second meshing portion 115 are meshed, the plurality of first teeth respectively extend into the tooth groove between two adjacent second teeth, and at the same time, the plurality of second teeth respectively extend into the tooth groove between two adjacent first teeth, thereby achieving the meshing of the first meshing portion 114 and the second meshing portion 115. The meshing of the plurality of first teeth and the second teeth can improve the meshing stability of the first meshing portion 114 and the second meshing portion 115, thereby improving the transmission stability of the first transmission gear 111.

[0041] Optional, such as Figure 3 and Figure 4 As shown, the first teeth are trapezoidal teeth or triangular teeth, and the tooth grooves of the second meshing portion 115 are trapezoidal grooves or triangular grooves, that is, the tooth grooves between two adjacent second teeth are trapezoidal grooves or triangular grooves.

[0042] Setting the first teeth and the second teeth as trapezoidal teeth or triangular teeth can increase the contact surface when the first teeth and the second teeth are meshed, thereby improving the stability during meshing.

[0043] The shape of the first tooth and the shape of the second tooth are the shapes along the cross section perpendicular to the rotation plane. Specifically, the shapes of the first tooth and the second tooth can be the same or different. For example, Figure 3 As shown, the first teeth are triangular teeth and the second teeth are trapezoidal teeth. It can be understood that the shape of the tooth groove between two adjacent first teeth is the same as the shape of the second tooth, so that the second tooth extends between the two second teeth, that is, the tooth groove between two adjacent first teeth is a trapezoidal groove, and the shape of the tooth groove between two adjacent second teeth is a triangular groove.

[0044] In one possible implementation of the embodiment of the present application, Figure 5 As shown, the tooth top angles of the first tooth and the second tooth are less than 60°.

[0045] The tooth top angle of the first tooth and the second tooth is less than 60 degrees, so that the contact surfaces of the first tooth and the second tooth have a larger inclination angle. In this way, when the first meshing portion 114 is meshed with the second meshing portion 115, the first tooth is not easily disengaged from the second tooth, thereby improving the stability of the meshing.

[0046] Optional, such as Figure 3 and Figure 4 As shown, a groove 117 is provided at the rotation axis of the second gear 113 , and the second meshing portion 115 is provided in the groove 117 , so that the rotation surfaces of the first gear 112 and the second gear 113 are in contact with each other.

[0047] The gear set 110 includes a plurality of transmission gears meshing in sequence. A groove 117 is provided at the rotating shaft of the second gear 113. The second meshing portion 115 is provided in the groove 117. The first meshing portion 114 extends into the groove 117 and meshes with the second meshing portion 115. The rotating surfaces of the first gear 112 and the second gear 113 fit together, so that the distance occupied by the first transmission gear 111 in the direction perpendicular to the rotating surface is smaller, which is convenient for the layout of other transmission gears.

[0048] In one possible implementation of the embodiment of the present application, Figure 3 and Figure 4 As shown, a connecting shaft 116 is disposed in the center of the first meshing portion 114 and the second meshing portion 115 , the axial direction of the connecting shaft 116 is the same as the axial direction of the first meshing portion 114 and the second meshing portion 115 , and the connecting shaft 116 corresponding to the first meshing portion 114 contacts the first meshing portion 114 .

[0049] A connecting shaft 116 is disposed at the center of the first meshing portion 114. The axial direction of the connecting shaft 116 is the same as that of the first meshing portion 114. The connecting shaft 116 contacts the inner surface of the plurality of first teeth to improve the strength of the first teeth. Similarly, a connecting shaft 116 may be disposed at the center of the second meshing portion 115 to improve the strength of the second teeth. The connecting shaft 116 corresponding to the second meshing portion 115 may contact or may not contact the second meshing portion 115.

[0050] In addition, in practical applications, the connecting shaft 116 can be Figure 3 and Figure 4 It is set to be hollow so that the transmission shaft of the transmission gear can pass through. The connecting shaft 116 of the first meshing part 114 and the connecting shaft 116 of the second meshing part 115 are connected to achieve the limit of the first meshing part 114 and the second meshing part 115.

[0051] Optional, such as Figure 5 As shown, the engagement depth of the first engagement portion 114 and the second engagement portion 115 is greater than 1.5 mm.

[0052] The meshing depth refers to the length of the overlapping portion of the first tooth and the second tooth in the direction perpendicular to the rotation plane. Figure 5 As shown in H.

[0053] It can be seen from the working process of the aforementioned execution component that the first meshing portion 114 and the second meshing portion 115 have two states of meshing and relative rotation. When the first meshing portion 114 and the second meshing portion 115 are meshed so that the first gear 112 and the second gear 113 rotate simultaneously, in the meshing state, the meshing depth needs to be larger to ensure the stability of the meshing state; therefore, the embodiment of the present application sets the meshing depth to be greater than 1.5mm. It should be noted that during relative rotation, a smaller meshing depth can reduce the friction force when the first meshing portion 114 and the second meshing portion 115 rotate relative to each other. Based on the above considerations, the embodiment of the present application sets the meshing depth of the first meshing portion 114 and the second meshing portion 115 to be between 1.5-4.0mm. The specific meshing depth is not limited in the embodiment of the present application, and can be 1.5mm, 1.7mm, 1.9mm, 2.0mm, 3.0mm, 4.0mm, etc.

[0054] In one achievable manner of the embodiment of the present application, the first transmission gear 111 is a transmission gear in the gear set 110 connected to the handle transmission member 120 , the second gear 113 is connected to the handle transmission member 120 , and the second gear 113 is a sector gear.

[0055] When the first transmission gear 111 is the transmission gear in the gear set 110 connected to the handle transmission member 120, the first gear 112 in the first transmission gear 111 is meshed with the upper gear, and the second gear 113 is connected to the handle transmission member 120. In order to facilitate the manual operation and electronic control operation of the handle 220, the handle transmission member 120 and the second gear 113 exist in two states, one of which is meshing rotation, and the gear set 110 drives the handle transmission member 120 to rotate; the other is that the gear set 110 and the handle transmission member 120 are separated from each other. Therefore, the embodiment of the present application sets the second gear 113 to be a fan-shaped gear, and correspondingly, the handle transmission member 120 is also set to a fan-shaped gear, such as Figure 1 and Figure 4 shown.

[0056] The embodiment of the present application also discloses a circuit breaker, including a motor 210, the above-mentioned actuator 100, a handle 220 connected to the handle transmission member 120 of the actuator 100, and a contact mechanism connected to the handle 220. The motor 210 is connected to the gear set 110 of the actuator 100 to drive the gear set 110 to rotate, and the gear set 110 drives the contact mechanism to rotate through the handle 220 to achieve the opening and closing of the circuit breaker. The circuit breaker includes the same structure and beneficial effects as the actuator 100 in the aforementioned embodiment. The structure and beneficial effects of the actuator 100 have been described in detail in the aforementioned embodiment and will not be repeated here.

[0057] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An actuator, characterized in that: include: A gear set (110) and a handle transmission member (120) transmission-connected to the gear set (110); the gear set (110) comprises a plurality of transmission gears meshing in sequence; a first transmission gear (111) among the transmission gears comprises a first gear (112) and a second gear (113) coaxially arranged; a first meshing portion (114) and a second meshing portion (115) are respectively arranged axially on a side where the first gear (112) and the second gear (113) are close to each other; when the first gear (112) and the second gear (113) are close to each other, the first meshing portion (114) and the second meshing portion (115) are meshed; when the first gear (112) and the second gear (113) are away from each other, the first meshing portion (114) and the second meshing portion (115) can rotate relative to each other.

2. The actuator according to claim 1, characterized in that: The invention also comprises a housing (140), wherein the gear set (110) and the handle transmission member (120) are arranged in the housing (140), and an elastic member (130) is arranged between the housing (140) and the first gear (112) or between the housing (140) and the second gear (113), wherein the elastic member (130) is driven to be compressed so that the first meshing portion (114) and the second meshing portion (115) rotate relative to each other, and the elastic member (130) is restored so that the first meshing portion and the second meshing portion (115) (113) are meshed again.

3. The actuator according to claim 1, characterized in that: The first meshing portion (114) includes a plurality of first teeth extending toward the second gear (113), and the plurality of first teeth are arranged in a circle; the second meshing portion (115) extends a plurality of second teeth toward the first gear (112), and the plurality of second teeth are arranged in a circle, and the plurality of first teeth are meshed with the second teeth.

4. The actuator according to claim 3, characterized in that: The first teeth are trapezoidal teeth or triangular teeth, and the tooth grooves between two adjacent second teeth are trapezoidal grooves or triangular grooves.

5. The actuator according to claim 3, characterized in that: The tooth top angles of the first tooth and the second tooth are less than 60°.

6. The actuator according to claim 2, characterized in that: A groove (117) is arranged at the rotation axis of the second gear (113), and the second meshing portion (115) is arranged in the groove (117) so that the rotation surfaces of the first gear (112) and the second gear (113) are in contact with each other.

7. The actuator according to claim 2, characterized in that: A connecting shaft (116) is arranged at the center of the first meshing portion (114) and the second meshing portion (115); the axial direction of the connecting shaft (116) is the same as the axial direction of the first meshing portion (114) and the second meshing portion (115), and the connecting shaft (116) corresponding to the first meshing portion (114) is in contact with the first meshing portion (114).

8. The actuator according to claim 1, characterized in that: The engagement depth of the first engagement portion (114) and the second engagement portion (115) is greater than 1.5 mm.

9. The actuator according to claim 1, characterized in that: The first transmission gear (111) is a transmission gear in the gear set (110) connected to the handle transmission member (120), and the second gear (113) is connected to the handle transmission member (120).

10. A circuit breaker, characterized in that: The invention comprises a motor (210), an actuator (100) according to any one of claims 1 to 9, a handle (220) connected to a handle transmission member (120) of the actuator (100), and a contact mechanism connected to the handle (220), wherein the motor (210) is connected to a gear set (110) of the actuator (100) to drive the gear set (110) to rotate, and the gear set (110) drives the contact mechanism to rotate through the handle (220), thereby realizing the opening and closing of the circuit breaker.

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