CN212209399U - Switching-off device and circuit breaker - Google Patents

Abstract

The utility model discloses a separating brake device and circuit breaker, separating brake device includes: the brake separating action mechanism is used for executing brake separating action and is provided with a first bulge and a second bulge; the rotating piece is provided with a first collision part and a second collision part and is used for driving the brake separating action mechanism to execute brake separating action; the first collision part is used for colliding with the first protrusion, and the second collision part is used for colliding with the second protrusion after the first collision part collides with the first protrusion. The utility model provides a separating brake device produces twice collisions through rotating the piece to the separating brake actuating mechanism for the separating brake actuating mechanism moves with higher speed, shortens the separating brake time.

Description

Switching-off device and circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field especially relates to a separating brake device and circuit breaker.

Background

The circuit breaker is a common circuit protection device, generally speaking, the circuit breaker has two states of opening and closing, when the circuit breaker is in the closing state, the circuit normally operates, and under the condition that faults such as overload and short circuit occur or the circuit needs to be overhauled, the circuit breaker needs to perform opening action to cut off the circuit. In the prior art, the opening time of the circuit breaker is long, the staying time of an electric arc between contacts is long, and the service life of the circuit breaker is influenced.

Thus, there is a need for improvements and enhancements in the art.

Disclosure of Invention

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a separating brake device and circuit breaker, aim at solving the long problem of separating brake time of circuit breaker among the prior art.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts as follows:

the utility model provides a switching-off device, is applied to in the circuit breaker, the switching-off device includes:

the brake separating action mechanism is used for executing brake separating action and is provided with a first bulge and a second bulge;

the rotating piece is provided with a first collision part and a second collision part, and the rotating piece is arranged on one side of the brake separating action mechanism and is used for driving the brake separating action mechanism to execute brake separating action;

the first collision part is used for colliding with the first protrusion, and the second collision part is used for colliding with the second protrusion after the first collision part collides with the first protrusion.

The brake separating device comprises a rotating piece and a brake separating action mechanism, wherein the rotating piece further comprises a driving part, and the driving part is used for receiving power provided by a power piece to drive the rotating piece to collide with the brake separating action mechanism.

The opening device is characterized in that the rotating part can rotate around a fixed shaft, the first collision part and the second collision part are arranged on one side of the fixed shaft, and a power action point provided by the power part is arranged on the other side of the fixed shaft.

The switching-off device, wherein, the switching-off actuating mechanism includes:

the first transmission piece is provided with the first bulge and the second bulge, can rotate around the main shaft and is provided with a first abutting surface;

a transmission part is arranged at one end of the second transmission part and provided with a second abutting surface, a first electric contact is arranged at the other end of the second transmission part, and the second transmission part can rotate around the main shaft;

the first elastic piece, the elasticity of first elastic piece acts on the second driving medium, just the elasticity direction of first elastic piece is for keeping away from the direction of the second electrical contact in the circuit breaker, works as first butt face with second butt face butt just first electrical contact with when the second electrical contact in the circuit breaker contacts, first driving medium and the second driving medium keeps relative static, works as first butt face with when the second butt face turns into the disengagement state by the butt state, the second driving medium rotates so that first electrical contact with the separation of second electrical contact.

The switching-off device, wherein, the second driving medium includes:

the transmission part is arranged at one end of the connecting rod, and a first stop surface is arranged on the connecting rod;

the moving contact is rotationally connected with the connecting rod, the first electric contact is arranged on the moving contact, and a second stop surface matched with the first stop surface is arranged on the moving contact;

the elastic force of the first elastic piece acts on the movable contact.

The opening device, wherein, the opening actuating mechanism includes the operating part, the transmission part with the operating part is connected.

The switching-off device, wherein, the switching-off actuating mechanism still includes:

and the elastic force of the second elastic piece acts on the operating piece, and the second elastic piece is used for assisting the operating piece to reach the brake separating position after the first abutting surface and the second abutting surface are converted into a disengaging state from an abutting state.

The switching-off device, wherein, the switching-off actuating mechanism still includes:

and a third elastic member, wherein after the first abutting surface and the second abutting surface are switched from the abutting state to the separated state, the elastic force of the third elastic member acts on the first transmission member to enable the first abutting surface and the second abutting surface to abut again.

A circuit breaker, wherein the circuit breaker comprises a breaking device as claimed in any one of the above.

Has the advantages that: compared with the prior art, the utility model provides a separating brake device and circuit breaker, separating brake device is applied to the circuit breaker, sets up the rotation piece that has first collision portion and second collision portion to and first bellied separating brake actuating mechanism of arch and second, at the in-process that separating brake actuating mechanism carried out the separating brake action, first collision portion with first protruding collision earlier, the second collision portion with the protruding back of second bumps, separating brake device produces twice collisions to separating brake actuating mechanism through rotating the piece, makes separating brake actuating mechanism moves with higher speed, shortens the separating brake time.

Drawings

Fig. 1 is an overall schematic view of an embodiment of a switching device provided by the present invention;

fig. 2 is a schematic view illustrating a first collision portion and a first protrusion of a tripping device according to the present invention colliding with each other;

fig. 3 is a schematic view illustrating a second collision portion and a second protrusion of the separating brake device according to the present invention colliding with each other;

fig. 4 is a schematic overall structural diagram of a first opening actuating mechanism in an embodiment of a first opening device provided in the present invention;

fig. 5 is a schematic view of an overall structure of a second opening actuating mechanism according to an embodiment of the present invention;

fig. 6 is a schematic view of the overall structure of the opening actuating mechanism in an embodiment of the opening device according to the present invention;

fig. 7 is a schematic overall structural diagram of a brake-separating action mechanism in an embodiment of a brake-separating device according to the present invention;

fig. 8 is a first schematic collision diagram of the rotating member and the opening actuating mechanism according to an embodiment of the present invention;

fig. 9 is a second schematic collision diagram of the rotating member and the opening actuating mechanism according to an embodiment of the present invention;

fig. 10 is a first schematic view illustrating an opening/closing operation mechanism in a closing state according to an embodiment of the present invention;

fig. 11 is a second schematic diagram of an embodiment of a switching device according to the present invention, wherein the switching actuating mechanism is in a switching state;

fig. 12 is a schematic view of a connection structure between a transmission part and an operation part according to an embodiment of the present invention;

fig. 13 is a schematic view illustrating an operation principle of the second elastic member in an embodiment of the switching device according to the present invention;

fig. 14 is a schematic functional diagram of a second elastic member in an embodiment of a switching device according to the present invention;

fig. 15 is a schematic view illustrating an operation principle of the third elastic member in an embodiment of the switching device according to the present invention.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the following description of the present invention will refer to the accompanying drawings and illustrate embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The utility model discloses an in one embodiment, provide a separating brake device, separating brake device is applied to in the circuit breaker, as shown in fig. 1, separating brake device includes separating brake actuating mechanism 100 and rotates piece 200, separating brake actuating mechanism 100 is used for carrying out the separating brake action, it is in to rotate piece 200 setting one side of separating brake actuating mechanism is used for the drive separating brake action is carried out to separating brake actuating mechanism 100. Specifically, be provided with first arch 11a and second arch 11b on the separating brake actuating mechanism, be provided with first collision portion 21a and second collision portion 21b on the rotation piece, rotate the drive when separating brake actuating mechanism carries out the separating brake action, first collision portion 21a be used for with first arch 11a bumps, second collision portion 21b be used for with second arch 11b bumps.

The opening action mechanism 100 may be any mechanism capable of performing an opening action, specifically, the opening of the circuit breaker is realized by separating electrical contacts, when the electrical contacts are connected, the circuit is connected, the circuit breaker is in a closing state, when the electrical contacts are separated, the circuit is disconnected, the circuit breaker is in an opening state, and the opening action mechanism 100 is used for realizing the separation of the electrical contacts to realize the opening. In the prior art, there are multiple separating brake actuating mechanisms, the separating brake actuating mechanism of the present invention can be but is not limited to one of the multiple separating brake actuating mechanisms in the prior art.

When the brake needs to be opened, as shown in fig. 2, the rotating member 200 operates, the first collision portion 21a collides with the first protrusion 11a first time, the brake-opening operating mechanism 100 starts to operate after receiving the collision force of the first collision portion 21a on the first protrusion 11a, and in the operating process of the brake-opening operating mechanism 100, as shown in fig. 3, the second collision portion 21b collides with the second protrusion 11b to give kinetic energy to the brake-opening operating mechanism 100 again, and the brake-opening operating mechanism 100 accelerates under the action of the collision force of the second collision portion 21b on the second protrusion 11 to realize rapid brake opening. From the preceding explanation, the utility model provides a separating brake device is through rotating twice collision to separating brake actuating mechanism for separating brake actuating mechanism can realize the separating brake action fast, shortens the separating brake time, thereby shortens the dwell time of electric arc between the electrical contact, reduces the ablation of electrical contact, improves the performance and the life of circuit breaker.

As shown in fig. 1, the rotating member 200 further includes a driving portion 220, and the driving portion 220 is configured to receive power provided by a power member 300 and drive the rotating member 200 to collide with the opening actuating mechanism 100. In one possible implementation manner, the rotating member 200 may rotate around a fixed shaft 400, the first collision portion 21a and the second collision portion 21b are on one side of the fixed shaft 400, the power member 300 provides power to drive the rotating member 200 to rotate around the fixed shaft 400, so that the first collision portion 21a on the other side of the fixed shaft 400 collides with the first protrusion 11a after rotating, and then the rotating member 200 continues to rotate, so that the second collision portion 21b collides with the second protrusion 11 b. The power provided by the power member 300 may be a suction force, specifically, the power member 300 may be an electromagnetic system, the electromagnetic system includes a coil winding, when a line is overloaded or short-circuited or a switching-off command sent remotely is received, the coil winding is turned on to generate an electromagnetic torque to provide a suction force for adsorbing the rotating member 200, so that the rotating member 200 rotates around the fixed shaft 400 (the rotating direction is as shown in fig. 1), to drive the switching-off actuating mechanism 100, in order to implement multiple switching-off, a reset elastic member is provided on the rotating member 200, the electromagnetic torque generated by the coil winding is greater than the acting torque of the reset elastic member on the rotating member 200, so that the rotating member 200 can rotate, after the switching-off actuating mechanism completes switching-off, the power member 300 does not provide any more power, and the rotating member 200 resets under the action of the reset elastic member, so that the rotating member 200 can realize the next opening driving. Of course, the power member 300 may be other components capable of driving the rotation member 200 to rotate.

In one possible implementation, as shown in fig. 4 to 5, the opening actuating mechanism 100 includes: the opening actuating mechanism 100 further includes a second transmission member 12, one end of the second transmission member 12 is provided with a transmission portion 13, the transmission portion 13 may be integrally formed with the second transmission member 12, or may be fixedly connected by riveting, screwing, or the like after being respectively formed, the first transmission member 11 is provided with a first abutting surface 110, the transmission portion 13 is provided with a second abutting surface 120 (as shown in fig. 5, fig. 5 is a view in which a part of the second transmission member 12 except the transmission portion 13 in fig. 4 is hidden), the other end of the second transmission member 12 is provided with a first electrical contact 121, and the first electrical contact 121 is matched with a second electrical contact 122 provided in a circuit breaker where the opening actuating mechanism 100 is located to cut off and connect a circuit, specifically, when the first electrical contact 121 contacts the second electrical contact 122, the circuit is closed, and the circuit breaker is in a closed state, and when the first electrical contact 121 is separated from the second electrical contact 122, the circuit is cut off, and the circuit breaker is in an open state.

The second transmission member may rotate around the spindle 10, the opening actuating mechanism 100 further includes a first elastic member 14, the first elastic member 14 may be a spring, an elastic sheet, or the like, an elastic force of the first elastic member 14 acts on the second transmission member 12, and an elastic force direction of the first elastic member 14 is a direction away from the second electrical contact 122, when the first abutting surface 110 abuts against the second abutting surface 120 and the first electrical contact 121 contacts the second electrical contact 122, due to an acting force between the first abutting surface 110 and the second abutting surface 120, an acting force between the first electrical contact 121 and the second electrical contact 122, and an elastic force of the first elastic member 14, the opening actuating mechanism 100 is balanced in force, and the first transmission member 11 and the second transmission member 12 are kept relatively stationary. And the position of the second electrical contact 122 is fixed, the first electrical contact 121 and the second electrical contact 122 can maintain a contact state, that is, the circuit breaker maintains a closed state. When the first abutting surface 110 and the second abutting surface 120 are turned from the abutting state to the disengaging state (as shown in fig. 6-7, fig. 7 is a diagram of fig. 6 in which the portion of the second transmission member 12 except the transmission portion 13 is hidden), as the acting force between the first abutting surface 110 and the second abutting surface 120 disappears, the force balance between the first transmission member 11 and the second transmission member 12 is broken, the second transmission member 12 rotates under the elastic force of the first elastic member 14, so that the first electrical contact 121 and the second electrical contact 122 are separated, specifically, the elastic force acting point of the first elastic member 14 is between the first electrical contact 121 and the main shaft 10, and when the second transmission member 12 rotates around the main shaft 10, the end provided with the first electrical contact 121 moves away from the second electrical contact 122, the first electrical contact 121 and the second electrical contact 122 are separated, the circuit is cut off, and the opening of the circuit breaker is realized. The first electrical contact 121 and the second electrical contact 122 may be separated by driving the first transmission member 11 to rotate by an external force, that is, the first transmission member 11 rotates when receiving the external force to separate the first electrical contact 121 and the second electrical contact 122.

As shown in fig. 8 to 9, the first protrusion 11a and the second protrusion 12a are disposed on the first transmission member 11, and the first transmission member 11 is further disposed with a third protrusion 11c, such that, when the rotation member 200 is operated, the first collision portion 21a collides with the first protrusion 11a (as shown in fig. 8), the first transmission member 11 starts to rotate, so that the first abutting surface 110 and the second abutting surface 120 are converted from the abutting state to the disengaged state, the distance from the first collision portion 21a to the rotation axis of the rotation member 200 is smaller than the distance from the second collision portion 21b to the rotation axis of the rotation member 200, the collision force of the first collision portion 21a to the first transmission member 11 is larger than the collision force of the second collision portion 21b to the first transmission member 11 when the rotation member 200 rotates, and the distance from the first protrusion 11a to the main shaft 10 is larger than the distance from the second protrusion 11b to the main shaft 10 The moment generated by the collision force of the first collision portion 21a on the first protrusion 11a to drive the first transmission member 11 to rotate is relatively large, so as to ensure that the first abutting surface 110 and the second abutting surface 120 can be reliably separated, and after the first abutting surface 110 and the second abutting surface 120 are separated, the second transmission member 12 starts to rotate under the elastic force of the first elastic member 14, and drives the first electrical contact 121 and the second electrical contact 122 to separate. Further, after the first collision portion 21a collides with the first protrusion 11a, the second collision portion 21b collides with the second protrusion 11b (as shown in fig. 9), so as to realize a second collision on the first transmission member 11, at this time, since the second collision portion 21b collides with the second protrusion 11b, the first abutment surface 110 and the second abutment surface 120 have been disengaged by the collision of the first collision portion 21a with the first protrusion 11a, the first transmission member 11 is in a free state, the first transmission member 11 is accelerated and rotated by the kinetic energy of the collision, the third protrusion 11c provided on the first transmission member 11 collides with the second transmission member 12, the second transmission member 12 is also subjected to the force of the third protrusion 11c by the elastic force of the first elastic member 14, the rotating speed of the second transmission member 12 is increased, the separating speed of the first electric contact 121 and the second electric contact 122 is increased, the electric arc staying time generated in the separating process of the first electric contact 121 and the second electric contact 122 is reduced, the short-circuit breaking capacity of the circuit breaker is improved, and the service life of the circuit breaker is prolonged.

Meanwhile, since the distance from the first collision part 21a to the rotation axis of the rotation member 200 is smaller than the distance from the second collision part 21b to the rotation axis of the rotation member 200, the stroke of the second collision part 21b is larger than the stroke of the first collision part 21a, and therefore, the stroke of the third protrusion 11c generated by the collision of the second collision part 21b with the second protrusion 11b is larger than the stroke of the third protrusion 11c generated by the collision of the first collision part 21a with the first protrusion 11a, and only the first collision part 21a is provided with respect to the rotation member 200, in this embodiment, the provision of the second collision part 21b enables the third protrusion 11c to generate a larger movement. The opening distance between the first electric contact 121 and the second electric contact 122 is larger, and the breaking and current limiting effects of the circuit breaker are better.

In a possible implementation manner, in order to make the contact between the first electrical contact 121 and the second electrical contact 122 more stable, as shown in fig. 4, the second transmission member 12 includes a connecting rod 123 and a movable contact 124, the movable contact 124 is rotatably connected to the connecting rod 123, specifically, a rotating shaft 1230 is disposed on the connecting rod 123, the movable contact 124 is rotatably connected to the connecting rod 123 through the rotating shaft 1230, the transmission part 13 is disposed at one end of the connecting rod 123, the first electrical contact 121 is disposed on the movable contact 124, a first stop surface 1231 is disposed on the connecting rod 123, a second stop surface 1241 matched with the first stop surface 1231 is disposed on the movable contact 124, the elastic force of the first elastic member 14 acts on the movable contact 124, and the rotating shaft 1230 is disposed between the elastic force acting point of the first elastic member 14 and the first electrical contact 121, in this way, when the first electrical contact 121 and the second electrical contact 122 are in contact with each other, under the elastic force of the first elastic element 14, the end of the movable contact 124, where the first electrical contact 121 is disposed, tends to rotate in the direction of the second electrical contact 122, so that the first electrical contact 121 and the second electrical contact 122 are in more reliable contact. After the first abutting surface 110 and the second abutting surface 120 are converted from the abutting state to the disengaging state, the connecting rod 123 rotates under the elastic force of the first elastic member 14 and the action force of the second electrical contact 122 on the first electrical contact 121, and simultaneously the movable contact 124 rotates around the rotating shaft 1230 under the elastic force of the first elastic member 14, when the movable contact 124 rotates around the rotating shaft 1230 for a certain angle, the first stop surface 1231 contacts with the second stop surface 1241, so that the movable contact 124 can not rotate around the rotating shaft 1230 any more, and at this time, the connecting rod 123 and the movable contact 124 integrally rotate (as shown in fig. 9), so as to separate the first electrical contact 121 and the second electrical contact 122.

In the case that the connecting rod 123 and the movable contact 124 are disposed on the second transmission member 12, when the third protrusion 11c collides with the second transmission member 12, the first stop surface 1231 disposed on the connecting rod 123 and the second stop surface 1241 disposed on the movable contact 124 are already contacted, that is, the connecting rod 123 and the movable contact 124 integrally rotate at this time, so that the movable contact 124 and the connecting rod 123 do not relatively rotate after the third protrusion 11c collides.

In a possible embodiment, the opening operating mechanism 100 includes an operating element, so that the opening operating mechanism 100 supports manual opening of a circuit breaker, which means that a component of the circuit breaker is manually operated to open the circuit breaker, specifically, as shown in fig. 4, the opening operating mechanism 100 further includes an operating element 16, the transmission part 13 is connected to the operating element 16, the operating element 16 includes a closing position and an opening position (as shown in fig. 4 and 10, the operating element 16 is in the closing position in fig. 4, and the operating element 16 is in the opening position in fig. 10), when the first abutting surface 110 abuts against the second abutting surface 120, and the first electrical contact 121 contacts the second electrical contact 122, the operating element 16 is in the closing position, it should be noted that, when the first transmission piece 11 and the second transmission piece 12 are kept relatively stationary, due to the combined action of the acting force between the operating element 16 and the transmission part 13, the acting force between the first abutting surface 110 and the second abutting surface 120, the acting force between the first electrical contact 121 and the second electrical contact 122, and the elastic force of the first elastic member 14, at this time, the operating element 16 is also kept stationary relative to the first transmission member 11 and the second transmission member 12, so that the first electrical contact 121 and the second electrical contact 122 are kept in contact, and the operating element 16 is kept at the closing position. When the brake is required to be opened, the operating element 16 is operated to move the operating element 16 to the opening position, and in the process that the operating element 16 moves to the opening position, the transmission part 13 is driven to move, and the second transmission piece 12 and the transmission part 13 move together, so that the first electric contact 121 and the second electric contact 122 are separated, and the opening is realized. When the opening is performed by operating the operating element 16, the first contact surface 110 and the second contact surface 120 maintain the contact state.

Specifically, as shown in fig. 12 (in fig. 12, the portion of the second transmission member 11 excluding the transmission portion 13 is hidden), the transmission portion 13 is connected to the operating member 16 via a connecting rod 136, both ends of the connecting rod 136 are respectively connected with the transmission part 13 and the operating part 16 in a rotating way, the transmission part 13 may be provided with a first hole for receiving one end of the connecting rod, the operation part 16 may be provided with a second hole for receiving the other end of the connecting rod, both ends of the connecting rod may rotate in the first hole and the second hole respectively, in the process of operating the operating member 16 to move to the opening position, the operating member 16 rotates around the fixed shaft, the connecting rod 136 follows the movement of the second hole to move the transmission part 13, meanwhile, the rotation of the connecting rod 136 in the first hole and the second hole can prevent the operating part 16 from being stuck in the process of driving the transmission part 13.

Further, in the present embodiment, in order to reduce the operating force of the operating member 16 driving the transmission member 13, the distance from the first electrical contact 121 on the movable contact 124 to the rotating shaft 1230 is equal to the distance from the acting point of the first elastic member 14 on the movable contact 124 to the rotating shaft 1230.

Further, the opening/closing operation mechanism 100 provided in this embodiment further supports a closing function, and specifically, the closing function of the opening/closing operation mechanism 100 provided in this embodiment is realized by the operating element 16. In order to switch the breaker from the open state to the closed state by operating the operating element 16, the operating element 16 is in the open position after the opening operation mechanism 100 is opened. Specifically, when the opening operation is performed by operating the operating element 16, the operating element 16 is moved to the closing position, and when the opening operation is performed by the internal driving element 15, after the first abutting surface 110 and the second abutting surface 120 are converted from the abutting state to the disengaging state, the transmission part 13 moves along with the second transmission element 12 so that the operating element 16 reaches the opening position.

In one possible implementation manner, in order to enable the operating element 16 to reach the opening position more quickly during opening, the opening actuation mechanism 100 further includes a second elastic member 17, an elastic force of the second elastic member 17 acts on the operating element 16, and the second elastic member 17 is used for assisting the operating element 16 to reach the opening position after the first abutting surface 110 and the second abutting surface 120 are converted from the abutting state to the disengaging state. Specifically, the second elastic member 17 may be a spring, an elastic sheet, or the like, and after the first abutting surface 110 and the second abutting surface 120 are converted from the abutting state to the disengaging state, the elastic force direction of the second elastic member 17 is a direction close to the opening position, so that the operating member 16 receives the elastic force of the second elastic member 17 in addition to the pushing force of the transmission portion 13, so that the operating member 16 reaches the opening position more quickly, and at the same time, the operating member 16 can be moved to the opening position when the transmission portion 13 provides a smaller pushing force, and the pushing force of the transmission portion 13 is obtained by the elastic force of the first elastic member 14, so that the first elastic member 14 can be designed to have a smaller elastic force and reduce the volume.

In one embodiment of the second elastic member 17, as shown in fig. 13, the operating member 16 rotates around a fixed shaft, the operating member 16 is provided with an elastic force acting surface 162, the elastic force of the second elastic member 17 acts on the elastic force acting surface 162, when the opening/closing operation mechanism 100 is in a closed state, the elastic force of the second elastic member 17, the acting force between the first abutting surface 110 and the second abutting surface 120, the elastic force of the first elastic member 14, and the acting force between the first electrical contact 121 and the second electrical contact 122 together keep the operating member 16, the first transmission member 11, and the second transmission member 12 in balance, the opening/closing operation mechanism 100 keeps the closed state, and when the abutting state of the first abutting surface 110 and the second abutting surface 120 is converted from the abutting state to the disengaged state, the operating member 16 is rotated to the opening/closing position by the second transmission member 12, the elastic force of the second elastic member 17 always acts on the elastic force acting surface 162 to assist the operating member 16 to move to the opening position until the operating member 16 reaches the opening position, and after the operating member 16 reaches the opening position, as shown in fig. 14, the elastic force of the second elastic member 17 may further continuously act on the elastic force acting surface 162 to keep the operating member 16 at the opening position. It is apparent that, even when the operation element 16 is operated to open the brake, the elastic force of the second elastic member 17 always acts on the elastic force acting surface 162 to assist the operation element 16 to reach the brake opening position, so that the brake opening operation force of the operation element 16 can be reduced.

The opening operating mechanism 100 includes a third elastic member 18, and when the first abutting surface 110 and the second abutting surface 120 are switched from the abutting state to the disengaged state during opening by the internal driving member 15, the elastic force of the third elastic member 18 acts on the first transmission member 11 to cause the first abutting surface 110 and the second abutting surface 120 to abut again, so that the first abutting surface 110 and the second abutting surface 120 return to the closed state while the abutting state is maintained. Specifically, the third elastic element 18 is fixedly disposed, the third elastic element 18 may be fixed to the circuit breaker or the main shaft, and the third elastic element 18 may be a spring, an elastic sheet, or the like. Fig. 15 shows an embodiment when the third elastic member 18 is a spring, the elastic portion of the third elastic member 18 does not contact the first transmission member 11 when the first abutting surface 110 and the second abutting surface 120 abut, after the first transmission member 11 rotates to convert the abutting state of the first abutting surface 110 and the second abutting surface 120 into the disengaged state, the first transmission member 11 continues to rotate, the second transmission member 12 drives the transmission portion 13 to move, the first transmission member 11 contacts the third elastic member 18 after rotating to a certain angle, the rotation is limited, after the second transmission member 12 rotates to a certain angle, the transmission portion 13 will contact the first transmission member 11 again, the elastic force of the third elastic member 18 acts on the first transmission member 11 to overcome the friction force between the first abutting surface 110 and the second abutting surface 120, the first abutting surface 110 and the second abutting surface 120 are brought into abutment again (as shown in fig. 10 to 11, fig. 11 is a view of the second transmission member 12 of fig. 10 with the portion other than the transmission portion 13 hidden). The second transmission member 12 is provided with a third stop surface 125, when the first abutting surface 110 and the second abutting surface 120 abut against each other again, the third stop surface 125 contacts with a limiting structure arranged on the circuit breaker, so that the second transmission member 12 cannot rotate continuously, the first transmission member 11, the transmission portion 13 and the second transmission member 12 keep relatively still again, and the first electrical contact 121 and the second electrical contact 122 are kept in a separated state. After the first abutting surface 110 and the second abutting surface 120 abut against each other again, the operating element 16 can be operated to close the switch, when the switch is closed, the operating element 16 moves from the switch-off position to the switch-on position to drive the transmission part 13 to move, and the first transmission member 11 rotates together with the second transmission member 12 due to the abutting acting force of the first abutting surface 110 and the second abutting surface 120, so that the first electrical contact 121 and the second electrical contact 122 are in contact with each other, and the switch is closed. After the switching-on, the switching-off operating mechanism 100 is restored to the switching-on state, that is, the switching-off operating mechanism 100 maintains the balance until the operating element 16 is operated or the first transmission element 11 rotates, so that the balance of the switching-off operating mechanism 100 is broken, and the switching-off operation is performed.

In another embodiment of the present invention, a circuit breaker is provided, which includes the opening device as described above.

The utility model discloses it should explain last: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (9)

1. The utility model provides a switching-off device which characterized in that, is applied to the circuit breaker, switching-off device includes:

the brake separating action mechanism is used for executing brake separating action and is provided with a first bulge and a second bulge;

the rotating piece is provided with a first collision part and a second collision part, and the rotating piece is arranged on one side of the brake separating action mechanism and is used for driving the brake separating action mechanism to execute brake separating action;

the first collision part is used for colliding with the first protrusion, and the second collision part is used for colliding with the second protrusion after the first collision part collides with the first protrusion.

2. The opening device according to claim 1, wherein the rotating member further comprises a driving portion for receiving power provided by a power member to drive the rotating member to collide with the opening actuating mechanism.

3. The opening device according to claim 2, wherein the rotating member is rotatable about a fixed shaft, the first collision portion and the second collision portion are on one side of the fixed shaft, and the power member provides a power application point on the other side of the fixed shaft.

4. The opening device according to claim 1, wherein the opening actuating mechanism comprises:

the first transmission piece is provided with the first bulge and the second bulge, can rotate around the main shaft and is provided with a first abutting surface;

a transmission part is arranged at one end of the second transmission part and provided with a second abutting surface, a first electric contact is arranged at the other end of the second transmission part, and the second transmission part can rotate around the main shaft;

the first elastic piece, the elasticity of first elastic piece acts on the second driving medium, just the elasticity direction of first elastic piece is for keeping away from the direction of the second electrical contact in the circuit breaker, works as first butt face with second butt face butt just first electrical contact with when the second electrical contact in the circuit breaker contacts, first driving medium and the second driving medium keeps relative static, works as first butt face with when the second butt face turns into the disengagement state by the butt state, the second driving medium rotates so that first electrical contact with the separation of second electrical contact.

5. The opening device according to claim 4, wherein said second transmission member comprises:

the transmission part is arranged at one end of the connecting rod, and a first stop surface is arranged on the connecting rod;

the moving contact is rotationally connected with the connecting rod, the first electric contact is arranged on the moving contact, and a second stop surface matched with the first stop surface is arranged on the moving contact;

the elastic force of the first elastic piece acts on the movable contact.

6. The opening device according to claim 4, wherein the opening actuating mechanism comprises an operating member, and the transmission part is connected with the operating member.

7. The opening device according to claim 6, wherein the opening actuating mechanism further comprises:

and the elastic force of the second elastic piece acts on the operating piece, and the second elastic piece is used for assisting the operating piece to reach the brake separating position after the first abutting surface and the second abutting surface are converted into a disengaging state from an abutting state.

8. The opening device according to claim 4, wherein the opening actuating mechanism further comprises:

and a third elastic member, wherein after the first abutting surface and the second abutting surface are switched from the abutting state to the separated state, the elastic force of the third elastic member acts on the first transmission member to enable the first abutting surface and the second abutting surface to abut again.

9. A circuit breaker, characterized in that it comprises a breaking device according to any one of claims 1-8.

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