Electric actuator for switching device and switching device

Abstract

The invention discloses an electric operation mechanism for a switching device. The electric operation mechanism comprises a rack; the motor is configured to provide power when being electrified and can rotate forwards and backwards; the transmission assembly is mounted on the rack, is connected to the motor and is configured to transmit power from the motor; the sliding block is connected to the transmission assembly and can be driven by the transmission assembly to move between a switching-on position and a switching-off position, when the sliding block stops at the switching-off position or moves from the switching-off position to the switching-on position, the motor rotates forwards when powered on, and when the sliding block moves from the switching-off position to the switching-on position, the motor rotates backwards when powered on; when the sliding block stops at the closing position or moves from the closing position to the opening position, the motor rotates reversely when powered on. The electric operation mechanism is simple and reliable in structure, low in cost and high in adaptability. The invention also discloses a switch device and a fusion switch comprising the electric operation mechanism.

Description

Technical Field

[0001] The invention relates to an electric operating mechanism for a switch device and the switch device. Background Art

[0002] With the rapid development of the new energy industry, there is an increasing demand for automatic control of the opening and closing of low-voltage electrical appliances. As for molded case circuit breakers, their electric operation is the basis for realizing such automatic control. The electric operation of the existing technology uses power electronic control to realize the opening and closing functions of molded case circuit breakers, which is costly and not competitive in the market.

[0003] It is expected to develop an electric operating mechanism which is low in cost and applicable to various types of fusion switches. Summary of the invention

[0004] In view of the above problems, according to a first aspect of the present invention, an electric operating mechanism for a switch device is proposed, comprising: a frame; a motor, configured to provide power when powered on, and capable of forward and reverse rotation; a transmission assembly, mounted on the frame and connected to the motor, and configured to transmit power from the motor; a slider, connected to the transmission assembly, capable of being driven by the transmission assembly to move between a closed position and an open position, wherein when the slider is parked at the open position or moves from the open position to the closed position, the motor rotates forward when powered on, and when the slider is parked at the closed position or moves from the closed position to the open position, the motor rotates reversely when powered on.

[0005] The electric operating mechanism according to the present invention may have one or more of the following features.

[0006] According to one embodiment, the electric operating mechanism also includes a position component, which is movably mounted to the frame, can be driven by the slider, and is configured to cause the motor to reverse. The position component includes a delay elastic member, whose position and stroke are designed so that when the slider moves from the opening position to the closing position or from the closing position to the opening position, the position component does not cause the motor to reverse, and the delay elastic member has passed its dead point and can cause the motor to reverse after a delay of a predetermined time at the moment under the action of its elastic force.

[0007] According to one embodiment, the transmission assembly includes a transmission gear rotatable relative to the frame, the position assembly includes a protruding actuating portion, and the electric operating mechanism also includes: a cam, which is coaxially fixed with the transmission gear and rotates synchronously with the transmission gear, and includes a cam body and a cam protrusion protruding outward from the cam body; a first microswitch, which is fixedly arranged near the cam, and when the cam rotates until the cam protrusion abuts against the first microswitch, the first microswitch is turned on, and when the cam rotates until the cam protrusion is separated from the first microswitch, the first microswitch is disconnected; a second microswitch and a third microswitch, which are fixedly arranged near the position assembly, and when the position assembly moves until the actuating portion abuts against the second microswitch and the third microswitch, the second microswitch and the third microswitch are in a pressed state that causes the motor to rotate forward when power is supplied, and when the position assembly moves until the actuating portion is separated from the second microswitch and the third microswitch, the second microswitch and the third microswitch are in a released state that causes the motor to rotate reversely when power is supplied.

[0008] Wherein, when the slider is in the opening position, the first microswitch is disconnected, and the second microswitch and the third microswitch are in a pressed state so that the motor rotates forward when powered on; when the slider is in the opening position, the motor is powered on for a triggering time, and the motor rotates forward until the first microswitch is turned on, so that after the triggering time, the motor can continue to rotate forward until the slider reaches the closing position, and the slider drives the position component to move, when the slider reaches the closing position, the first microswitch is disconnected, and the second microswitch and the third microswitch are converted to a released state so that the motor is reversed when powered on; when the slider is in the closing position, the motor is powered on for a triggering time, and the motor is reversed until the first microswitch is turned on, so that after the triggering time, the motor can continue to reverse until the slider reaches the opening position, and the slider drives the position component to move, when the slider reaches the opening position, the first microswitch is disconnected, and the second microswitch and the third microswitch are converted to a pressed state so that the motor rotates forward when powered on.

[0009] According to one embodiment, the slider includes a slider protrusion protruding from the slider body, and the position assembly includes: a first position member, a second position member and a third position member. The first position member is slidably mounted to the frame, including: a first body formed in a plate shape; a first groove running through the first body, cooperating with the slider protrusion, so that the first position member can be driven by the slider protrusion; a first actuating portion protruding upward from the first body. The second position member is rotatably mounted to the frame, located above the first position member, including: a second body formed in a disc shape; a first follower portion and a second follower portion protruding outward from the second body and spaced apart from each other, the first follower portion and the second follower portion being configured to be driven by the first actuating portion in opposite directions, respectively, so that the second position member rotates in opposite directions, respectively; a second positive actuating portion and a second negative actuating portion protruding upward from the second body and spaced apart from each other. The third positioning member is rotatably mounted to the frame and is located above the second positioning member, comprising: a third main body formed in a disc shape; a third follower portion protruding downward from the third main body and arranged between the second positive actuating portion and the second counter actuating portion, so that the second positioning member can rotate in opposite directions by respectively cooperating with the second positive actuating portion and the second counter actuating portion and the third follower portion to drive the third positioning member to rotate in opposite directions; the actuating portion is configured to press and disengage the second micro switch and the third micro switch.

[0010] According to one embodiment, the position assembly further includes a first elastic member, which is a torsion spring, one end of which is fixed to the frame, and the other end of which is fixed to the first position member.

[0011] According to one embodiment, the second positioning member includes: a second groove formed on the second body and extending radially; two limiting portions arranged on both sides of the second groove and extending parallel to the second groove; an abutment portion connecting one end of the two limiting portions and close to the rotation axis of the second positioning member, and the positioning assembly also includes: a rotating rod, whose main body is formed in a rod shape, one end of which is rotatably mounted to the frame, and the other end is configured to move in the second groove; a delay elastic member, which is a compression spring, arranged between the two limiting portions and extending parallel to the second groove, whose first end abuts against the other end of the rotating rod, and whose second end abuts against the abutment portion of the second positioning member.

[0012] According to one embodiment, the position and stroke of the delay elastic member are designed so that, when the first microswitch changes from on to off, the second position member has not yet reached the position for switching the second microswitch and the third microswitch, and the delay elastic member has passed its dead point and can apply elastic force to the second position member to make it continue to rotate to the position for switching the second microswitch and the third microswitch.

[0013] According to one embodiment, when the slider is in the open position, the motor is energized for the triggering time, the motor rotates forward, the transmission assembly is driven, and the cam rotates from the position where the cam protrusion is separated from the first micro switch to the position where the cam protrusion abuts against the first micro switch, and the first micro switch is turned on, so that after the triggering time, the motor can continue to rotate forward until the slider reaches the closed position. At the same time, when the slider is about to reach the closed position, the slider protrusion drives the first position member to move through the first groove matched with it, and the first actuating portion of the first position member drives the first driven portion matched with it. The second positioning member rotates, and when the slider reaches the closing position, the cam rotates to the position where the cam protrusion is separated from the first micro switch to disconnect the first micro switch. At this time, the second positioning member rotates to the position where the time-delay elastic member has passed its dead point. Under the elastic force of the time-delay elastic member, the second positioning member continues to rotate, so that the second positive actuating portion abuts against and drives the third driven portion to rotate the third positioning member from the position pressing the second micro switch and the third micro switch to the position separated from the second micro switch and the third micro switch. The second micro switch and the third micro switch are converted to the release position that reverses when the motor is energized. When the slider is in the closed position, the motor is powered on for the triggering time, the motor is reversed, the transmission assembly is driven, and the cam is rotated from the position where the cam protrusion is separated from the first micro switch to the position where the cam protrusion is against the first micro switch, and the first micro switch is turned on, so that after the triggering time, the motor can continue to reverse until the slider reaches the open position, and when the slider is about to reach the open position, the slider protrusion drives the first position member to move through the first groove matched with it, and the first actuating portion of the first position member drives the second driven portion matched with it. The positioning member rotates, and when the slider reaches the opening position, the cam rotates to the position where the cam protrusion disengages from the first microswitch to disconnect the first microswitch. At this time, the second positioning member rotates to the position where the delay elastic member has passed its dead point. Under the elastic force of the delay elastic member, the second positioning member continues to rotate, so that the second counter-actuating portion abuts against and drives the third driven portion to rotate the third positioning member from the position disengaged from the second microswitch and the third microswitch to the position pressing the second microswitch and the third microswitch. The second microswitch and the third microswitch are converted to a pressing state that causes the motor to rotate forward when power is supplied.

[0014] According to one embodiment, the cam includes a first drive surface transitioning from the cam body to the cam protrusion and a second drive surface transitioning from the cam protrusion back to the cam body, the first drive surface and the second drive surface being planar.

[0015] According to one embodiment, the trigger time lasts at least the time for the cam to rotate past the first drive surface or the second drive surface.

[0016] According to a second aspect of the present invention, a switch device is proposed, comprising the above-mentioned electric operating mechanism, wherein the switch device is one of the following: a molded case circuit breaker, a load switch, a fused switch of a load switch mechanism type, and a fused switch of a circuit breaker mechanism type.

[0017] According to a third aspect of the present invention, a fusion switch is proposed, comprising the above-mentioned electric operating mechanism, wherein when the fusion switch is in an off state and is ready to be switched to a pre-charging state, the slider is in an open position, so that the motor is powered on for a triggering time; when the pre-charging of the fusion switch fails, the slider is in a closed position, so that the motor is powered on for a triggering time; when the fusion switch is in an on state and is ready to be switched to an off state, the slider is in a closed position, so that the motor is powered on for a triggering time.

[0018] The electric operating mechanism according to the present invention and the switch device or fusion switch including the electric operating mechanism have one or more of the following advantages:

[0019] 1. Simpler structure: The micro switch cooperates with the position component and the cam arranged on the transmission component, and the structure is simple and clear.

[0020] 2. More reliable: The current direction of the motor is only related to the position of the slider, that is, only the state is recorded but not the process, so it has strong fault tolerance.

[0021] 3. Low cost: fewer parts, reducing product cost and investment cost.

[0022] 4. Strong applicability: It can be widely used in different switch devices including the following: molded case circuit breakers, load switches, fusion switches of load switch-like mechanism types, and fusion switches of circuit breaker mechanism types. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention, wherein the drawings are only used to illustrate some embodiments of the present invention, but not to limit all embodiments of the present invention thereto.

[0024] Figure 1 1 is a top view of the electric operating mechanism according to the present invention.

[0025] Figure 2 Detailed description of the invention FIG.

[0026] Figure 3 1 is a perspective view of a first position member of the electric operating mechanism according to the present invention.

[0027] Figure 4 1 is a perspective view of the second position member of the electric operating mechanism according to the present invention as viewed from above.

[0028] Figure 5 1 is a perspective view of the third position member of the electric operating mechanism according to the present invention as viewed from below.

[0029] Figure 6 It is a top view of the electric operating mechanism according to the present invention, and the slider is in the opening position at this time.

[0030] Figure 7 It is a top view of the electric operating mechanism according to the present invention. At this time, when the slider is in the opening position, the motor is energized for the triggering time, and the first micro switch is turned on.

[0031] Figure 8 It is a top view of the electric operating mechanism according to the present invention. At this time, when the slider is in the open position, the motor is energized for a triggering time, and the motor continues to rotate forward.

[0032] Fig. 9 3 is a top view of the electric operating mechanism according to the present invention, at which time the first micro switch is disconnected and the third positioning member is rotating.

[0033] Fig.10 It is a top view of the electric operating mechanism according to the present invention, at which time the first micro switch is disconnected, and the second micro switch and the third micro switch are switched to a release state that causes the motor to reverse when powered on.

[0034] Fig.11 It is a top view of the electric operating mechanism according to the present invention. At this time, when the slider is in the closing position, the motor is energized for a triggering time, the first micro switch is turned on, and the motor continues to reverse.

[0035] Fig.12 3 is a top view of the electric operating mechanism according to the present invention, at which time the first micro switch is disconnected and the third positioning member is rotating.

[0036] Fig.13 It is a top view of the electric operating mechanism according to the present invention, at which time the first micro switch is disconnected, and the second micro switch and the third micro switch are switched to a pressed state to make the motor rotate forward when powered on.

[0037] Fig.141 is a circuit diagram showing the principle of process one of the electric operating mechanism according to the present invention, wherein (a) the motor is energized when the slider is in the open position, and the second microswitch and the third microswitch are in a pressed state to cause the motor to rotate forward when energized; (b) the first microswitch is turned on; (c) the first microswitch is turned off; (d) the second microswitch and the third microswitch are converted to a released state to cause the motor to rotate reversely when energized.

[0038] Fig.15 1 is a circuit diagram showing the principle of process 2 of the electric operating mechanism according to the present invention, wherein (a) the slider is in the closed position, and the second microswitch and the third microswitch are in a released state so as to cause the motor to reverse when energized; (b) after the motor is energized for a certain period of time, the first microswitch is turned on; (c) the first microswitch is turned off; and (d) the second microswitch and the third microswitch are switched to a pressed state so as to cause the motor to rotate forward when energized.

[0039] Reference numerals list

[0040] 1 motor, 2 transmission assembly, 21 transmission gear, 22 transmission plate, 23 transmission protrusion, 3 slider, 31 slider protrusion, 32 slider groove, 4 cam, 41 cam body, 42 cam protrusion, 43 first driving surface, 44 second driving surface, 5 position assembly, 51 first position member, 511 first body, 512 first groove, 513 first actuating portion, 52 second position member, 521 second body, 522 first driven portion, 523 second driven portion, 524 second positive actuating portion, 525 second negative actuating portion, 526 second groove, 527 limiting portion, 528 abutting portion, 53 third position member, 531 third body, 532 third driven portion, 533 actuating portion, 6 first elastic member, 7 delay elastic member, 8 rotating rod, K1 first micro switch, K2, K3 second micro switch and third micro switch DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] The present invention is described in detail below by describing exemplary embodiments.

[0044] The electric operating mechanism according to the present invention is used for a switch device, so that the handle of the switch device can be electrically controlled. The switch device is, for example, one of the following: a molded case circuit breaker, a load switch, a fusion switch of a load switch mechanism type, or a fusion switch of a circuit breaker mechanism type.

[0045] Figure 1 1 is a top view of the electric operating mechanism according to the present invention. Figure 2 is an exploded view of the electric operating mechanism according to the present invention. Figure 1 and Figure 2 The electric operating mechanism according to the present invention includes a frame; a motor 1, configured to provide power when powered; a transmission assembly 2, connected to the motor 1 and configured to transmit power from the motor 1, including a transmission gear 2 rotatable relative to the frame; a slider 3, connected to the transmission assembly 2, capable of being driven by the transmission assembly 2 to slide between a closing position and an opening position, including a slider protrusion 31 protruding from the main body of the slider 3; a cam 4, fixed coaxially with the transmission gear 2 and rotating synchronously with the transmission gear 2, including a cam body 41 and a cam protrusion 42 protruding outward from the cam body 41. The transmission assembly 2, for example, includes a transmission disc 22 fixed to the transmission gear 21 and rotating together with the transmission gear 21, such as Figure 2 As shown, the transmission disc 2 may include a transmission protrusion 23 protruding from the surface opposite to the transmission gear 21 toward the slider 3, and the slider 3 may include a slider groove 32 cooperating with the transmission protrusion 23, so that the rotation of the transmission gear 21 can drive the slider 3 to slide linearly between the closing position and the opening position through the cooperation of the transmission protrusion 23 and the slider groove 32.

[0046] The electric operating mechanism according to the present invention further includes a first micro switch K1, which is fixedly arranged near the cam 4. When the cam 4 rotates until the cam protrusion 42 abuts against the first micro switch K1, the first micro switch K1 is turned on, and when the cam 4 rotates until the cam protrusion 42 is separated from the first micro switch K1, the first micro switch K1 is turned off. That is, the first micro switch K1 is used to control the rotation and stop of the motor 1.

[0047] Preferably, the cam 4 may include a first driving surface 43 transitioning from the cam body 41 to the cam protrusion 42 and a second driving surface 44 transitioning from the cam protrusion 42 back to the cam body 41. Figure 1 In the embodiment shown, the first drive surface 43 and the second drive surface 44 are planes. The cam body 41 can be formed to be smaller, for example, in the form of a sleeve. The cam protrusion 42 can be formed as a part of a circular ring continuous between the first drive surface 43 and the second drive surface 44.

[0048] The electric operating mechanism according to the present invention also includes a position component 5, which is movably mounted to the frame, can be driven by the slider 3, and is configured to cause the motor to reverse. The position component 5, for example, includes a protruding actuating portion 533. The electric operating mechanism according to the present invention also includes a second microswitch and a third microswitch K2, K3, which are fixedly arranged close to the position component 5. When the position component 5 moves to the point where the actuating portion 533 abuts against the second microswitch and the third microswitch K2, K3, the second microswitch and the third microswitch K2, K3 are in a pressed state that causes the motor 1 to rotate forward when powered on. When the position component 5 moves to the point where the actuating portion 533 disengages from the second microswitch and the third microswitch K2, K3, the second microswitch and the third microswitch K2, K3 are in a released state that causes the motor 1 to reverse when powered on. That is, the second microswitch and the third microswitch K2, K3 are used to control the direction of the motor 1. Specifically, as Fig.14 and 15 As shown, when the second micro switch and the third micro switch K2, K3 are connected at 11-14 and 21-22, the motor 1 rotates forward when powered on; when the second micro switch and the third micro switch K2, K3 are connected at 11-12 and 21-24, the motor 1 rotates reversely when powered on.

[0049] Specifically, as an example, the position assembly 5 of the electric operating mechanism according to the present invention may include a first position member 51, a second position member 52, a third position member 53, a first elastic member 6, a rotating rod 8 and a time-delay elastic member 7. It should be noted that the position assembly may be designed in a manner different from this example, as long as the corresponding function can be achieved.

[0050] The first positioning member 51 is slidably mounted to the frame, such as Figure 3As shown, the first positioning member 51 may include a first body 511, which is formed in a plate shape. The first positioning member 51 may also include a first groove 512 that runs through the first body 511, which cooperates with the slider protrusion 31, so that the first positioning member 51 can be driven by the slider protrusion 31. Specifically, the first groove 512 is, for example, a linear groove, and the slider protrusion 31 protrudes through the first groove 512 and moves linearly along the first groove 512 when the slider 3 moves. When the slider protrusion 31 moves in the first direction to abut against one end of the first groove 512 and continues to move, it can drive the first positioning member 51 to move in the first direction. When the slider protrusion 31 moves in a second direction opposite to the first direction to abut against the other end of the first groove 512 and continues to move, it can drive the first positioning member 51 to move in the second direction. The first positioning member 51 may also include a first actuating portion 513 that protrudes upward from the first body 511.

[0051] The first elastic member 6 is a torsion spring, one end of which is fixed to the frame, and the other end is fixed to the first position member 51. The first elastic member 6 is configured to achieve polarization of the position of the first position member 51. That is, when the slider 3 drives the first position member 51 to move, the first elastic member 6 assists the first position member 51 to reach the predetermined position.

[0052] The second positioning member 52 is rotatably mounted to the frame and is located above the first positioning member 51. Figure 4 As shown, the second position member 52 may include a second body 521, which is formed into a disc shape. The second position member 52 may also include a first driven portion 522 and a second driven portion 523 protruding outward from the second body 521 and spaced apart from each other, and the first driven portion 522 and the second driven portion 523 are configured to be driven by the first actuating portion 513 of the first position member 51 in opposite directions, respectively, so that the second position member 52 rotates in opposite directions respectively. The second position member 52 may also include a second positive actuating portion 524 and a second negative actuating portion 525, which protrude upward from the second body 521 and are spaced apart from each other. The second position member 52 may also include a second groove 526 formed on the second body 521 and extending radially, two limiting portions 527 arranged on both sides of the second groove 526 and extending parallel to the second groove 526, and abutting portion 528 connecting one end of the two limiting portions 527 and close to the rotation axis of the second position member 52. Optionally, in order to make the second groove 526 long enough, the second positioning member 52 may further include a second protrusion protruding outward from the second body 521 , and the second groove 526 is arranged to extend from the second body 521 to the second protrusion in the radial direction.

[0053] like Figure 2 As shown, the main body of the rotating rod 8 is formed into a rod shape, one end of which is rotatably mounted to the frame, and the other end of which is configured to move in the second slot 526 of the second position member 52. For example, one end and the other end of the rotating rod 8 extend perpendicularly from the rod-shaped main body, respectively. Figure 2Shown and referenced Figure 4 The time-delay elastic member 7 is a compression spring, which is arranged between the two limiting portions 527 and extends parallel to the second slot 526, with its first end abutting against the other end of the rotating rod 8, and its second end abutting against the abutting portion 528 of the second position member 52. Then, when the second position member 52 is driven to rotate, the rotating rod 8 is driven by the second position member 52 to rotate and compress the time-delay elastic member 7. After the time-delay elastic member 7 passes the dead point, under the action of the time-delay elastic member 7, the second position member 52 can continue to rotate.

[0054] The third positioning member 53 is rotatably mounted to the frame and is located above the second positioning member 52. Figure 5 As shown, the third position member 53 may include a third body 531 formed in a disc shape. The third position member 53 may also include a third follower 532, which protrudes downward from the third body 531 and is arranged between the second positive actuation portion 524 and the second counter-actuation portion 525 of the second position member 52, so that the second position member 52 can rotate in opposite directions by the cooperation of the second positive actuation portion 524 and the second counter-actuation portion 525 with the third follower 532, respectively, to drive the third position member 53 to rotate in opposite directions. However, the third follower 532 is not directly sandwiched between the second positive actuation portion 524 and the second counter-actuation portion 525, but when the third follower 532 contacts one of the second positive actuation portion 524 and the second counter-actuation portion 525, it maintains a certain distance from the other of the second positive actuation portion 524 and the second counter-actuation portion 525. The third position member 53 may also include an actuating portion 533, which is configured to press and disengage the second micro switch and the third micro switch K2, K3. The actuating portion 533 of the positioning assembly 5 mentioned above is the actuating portion 533 of the third positioning member 53 .

[0055] Preferably, the position and stroke of the time-delay elastic member 7 are designed so that when the first microswitch K1 is switched from on to off, the second position member 52 has not yet reached the position for switching the second microswitch and the third microswitch K2, K3, and the time-delay elastic member 7 has passed its dead point and can apply elastic force to the second position member 52 to make it continue to rotate to the position for switching the second microswitch and the third microswitch K2, K3. In other words, the time-delay elastic member 7 can ensure that the motor 1 is delayed for a predetermined time after stopping before reversing. That is, when the slider 3 moves from the opening position to the closing position or from the closing position to the opening position, the position assembly 5 does not cause the motor 1 to reverse, and the time-delay elastic member has passed its dead point and can cause the motor to reverse after a predetermined time delay at this moment under the action of its elastic force. Specifically, when the slider 3 moves from the open position to the closed position, the motor 1 rotates forward, and when the slider 3 reaches the closed position, the position component 5 does not cause the motor 1 to switch to the state of reverse rotation when power is turned on, and the delay elastic member 7 has passed its dead point and can, under the action of its elastic force, delay a predetermined time at this moment to cause the motor 1 to switch to the state of reverse rotation when power is turned on; when the slider 3 moves from the closed position to the open position, the motor 1 reverses, and when the slider 3 reaches the open position, the position component 5 does not cause the motor 1 to switch to the state of forward rotation when power is turned on, and the delay elastic member 7 has passed its dead point and can, under the action of its elastic force, delay a predetermined time at this moment to cause the motor 1 to switch to the state of forward rotation when power is turned on.

[0056] Reference below Figure 6-13 The principle of the electric operating mechanism according to the present invention is described in detail.

[0057] like Figure 6 As shown, when the slider 3 is in the off position, the first micro switch K1 is disconnected, and the second micro switch and the third micro switch K2, K3 are in a pressed state to make the motor 1 rotate forward when powered on.

[0058] Process 1: When the slider 3 is in the open position, the motor 1 is energized for the triggering time, such as Fig.14 As shown in (a), the motor 1 rotates forward, the transmission assembly 2 is driven, and the cam 4 rotates from the position where the cam protrusion 42 is separated from the first micro switch K1 to the position where the cam protrusion 42 abuts against the first micro switch K1, and the first micro switch K1 is turned on. Figure 7 and 14 (b), so that after the trigger time, the motor 1 can continue to rotate forward, as shown in Figure 8As shown, until the slider 3 reaches the closing position, when the slider 3 is about to reach the closing position, the slider protrusion 31 drives the first positioning member 51 to move through the first groove 512 matched therewith, and the first actuating portion 513 of the first positioning member 51 drives the second positioning member 52 to rotate through the first driven portion 522 matched therewith. When the slider 3 reaches the closing position, the cam 4 rotates to the position where the cam protrusion 42 disengages from the first micro switch K1, so that the first micro switch K1 is disconnected. Fig. 9 and 14 As shown in (c), at this time, the second positioning member 52 rotates to the position where the time-delay elastic member 7 has passed its dead point. Under the elastic force of the time-delay elastic member 7, the second positioning member 52 continues to rotate, so that the second positive actuating portion 524 abuts against and drives the third driven portion 532, so that the third positioning member 53 rotates from the position of pressing the second micro switch and the third micro switch K2, K3 to the position of disengaging from the second micro switch and the third micro switch K2, K3, and the second micro switch and the third micro switch K2, K3 are converted to the release state that reverses when the motor 1 is powered on, as shown in FIG. Fig.10 and 14 (d) as shown.

[0059] Process 2: When the slider 3 is in the closing position (such as Fig.10 and 15 (a), at this time, the second micro switch and the third micro switch K2, K3 are in the release state to reverse when the motor 1 is powered on, and the first micro switch K1 is disconnected) so that the motor 1 is powered on for a continuous triggering time, the motor 1 reverses, the transmission assembly 2 is driven, and the cam 4 rotates from the position where the cam protrusion 42 is separated from the first micro switch K1 to the position where the cam protrusion 42 abuts against the first micro switch K1, and the first micro switch K1 is turned on. Fig.15 (b), so that after the trigger time, the motor 1 can continue to reverse, as shown in Fig.11 As shown, until the slider 3 reaches the opening position, when the slider 3 is about to reach the opening position, the slider protrusion 31 drives the first position member 51 to move through the first groove 512 matched therewith, and the first actuating portion 513 of the first position member 51 drives the second position member 52 to rotate through the second driven portion 523 matched therewith. When the slider 3 reaches the opening position, the cam 4 rotates to the position where the cam protrusion 42 disengages from the first micro switch K1, so that the first micro switch K1 is disconnected. Fig.12 and 15As shown in (c), at this time, the second positioning member 52 rotates to the position where the delay elastic member 7 has passed its dead point. Under the elastic force of the delay elastic member 7, the second positioning member 52 continues to rotate, so that the second counter-actuating portion 525 abuts against and drives the third driven portion 532 to rotate the third positioning member 53 from the position of disengaging from the second microswitch and the third microswitch K2, K3 to the position of pressing the second microswitch and the third microswitch K2, K3. The second microswitch and the third microswitch K2, K3 are converted to the pressing state that causes the motor 1 to rotate forward when powered on, as shown in FIG. Fig.13 and 15 (d) as shown.

[0060] When the electric operating mechanism according to the present invention is used for a fusion switch, when the fusion switch is in the disconnected state and is ready to be switched to the pre-charging state (i.e., from OFF to ON), the slider 3 is in the open position, so that the motor 1 is energized for the triggering time, and the electric operating mechanism implements the above-mentioned process one; when the pre-charging of the fusion switch fails, the slider 3 is in the closed position, so that the motor 1 is energized for the triggering time, and the electric operating mechanism implements the above-mentioned process two; when the fusion switch is in the connected state and is ready to be switched to the disconnected state (i.e., from ON to OFF), the slider 3 is in the closed position, so that the motor 1 is energized for the triggering time, and the electric operating mechanism implements the above-mentioned process two.

[0061] Preferably, the triggering time lasts at least the time for the cam 4 to rotate past the first driving surface 43 or the second driving surface 44 , so that the first micro switch K1 can be turned on.

[0062] The electric operating mechanism according to the present invention has one or more of the following advantages:

[0063] 1. Simpler structure: The micro switch cooperates with the position member and the cam 4 arranged on the transmission assembly 2, and the structure is simple and clear.

[0064] 2. More reliable: The current direction of the motor 1 is only related to the position of the slider 3, that is, only the state is recorded but not the process, so the fault tolerance is strong.

[0065] 3. Low cost: fewer parts, reducing product cost and investment cost.

[0066] 4. Strong applicability: It can be widely used in different switch devices including the following: molded case circuit breakers, load switches, fusion switches of load switch-like mechanism types, and fusion switches of circuit breaker mechanism types.

[0067] The present invention specifically describes Figure 1-13However, it should be noted that as long as the motor 1 rotates forward when the slider 3 is in the open position or moves from the open position to the closed position, and reverses when the slider 3 is in the closed position or moves from the closed position to the open position, the current direction of the motor 1 is only related to the position of the slider 3, thereby obtaining an electric operating mechanism with strong fault tolerance. Therefore, the specific structure of the transmission component and the component for identifying the position of the slider 3 can be implemented in a manner different from the disclosed embodiments, and these different implementations should also be included in the protection scope of the present invention.

[0068] The exemplary implementation schemes of the electric operating mechanism and the switch device proposed in the present invention are described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention can be combined in various ways without exceeding the protection scope of the present invention.

Claims

1. An electric operating mechanism for a switch device, comprising: frame; A motor configured to provide power when powered and capable of forward and reverse rotation; a transmission assembly mounted to the frame and connected to the motor and configured to transmit power from the motor; A slider is connected to the transmission assembly and can be driven by the transmission assembly to move between a closing position and an opening position. Wherein, when the slider is parked at the open position or moves from the open position to the closed position, the motor rotates forward when powered on, and when the slider is parked at the closed position or moves from the closed position to the open position, the motor rotates reversely when powered on.

2. The electric operating mechanism according to claim 1, wherein: The electric operating mechanism also includes a position component, which is movably mounted to the frame, can be driven by the slider, and is configured to cause the motor to reverse. The position component includes a delay elastic member, and its position and stroke are designed so that when the slider moves from the open position to the closed position or from the closed position to the open position, the position component does not cause the motor to reverse, and the delay elastic member has passed its dead point and can cause the motor to reverse after a delay of a predetermined time at the moment under the action of its elastic force.

3. The electric operating mechanism according to claim 2, wherein: The transmission assembly includes a transmission gear rotatable relative to the frame, the position assembly includes a protruding actuating portion, and the electric operating mechanism further includes: a cam, fixed coaxially with the transmission gear and rotating synchronously with the transmission gear, comprising a cam body and a cam protrusion protruding outward from the cam body; a first micro switch, fixedly arranged near the cam, wherein when the cam rotates until the cam protrusion abuts against the first micro switch, the first micro switch is turned on, and when the cam rotates until the cam protrusion is separated from the first micro switch, the first micro switch is turned off; The second micro switch and the third micro switch are fixedly arranged near the position assembly. When the position assembly moves until the actuating portion abuts against the second micro switch and the third micro switch, the second micro switch and the third micro switch are in a pressed state so that the motor rotates forward when powered on. When the position assembly moves until the actuating portion is disengaged from the second micro switch and the third micro switch, the second micro switch and the third micro switch are in a released state so that the motor rotates reversely when powered on. Wherein, when the slider is in the off position, the first micro switch is disconnected, and the second micro switch and the third micro switch are in a pressed state to make the motor rotate forward when powered on; When the slider is in the open position, the motor is powered on for a trigger time, and the motor rotates forward until the first micro switch is turned on, so that after the trigger time, the motor can continue to rotate forward until the slider reaches the closed position, and the slider drives the position component to move. When the slider reaches the closed position, the first micro switch is turned off, and the second micro switch and the third micro switch are switched to a release state that causes the motor to reverse when powered on; When the slider is in the closed position, the motor is energized for the trigger time, and the motor is reversed so that the first microswitch is turned on, so that after the trigger time, the motor can continue to reverse until the slider reaches the open position, and at the same time, the slider drives the position component to move. When the slider reaches the open position, the first microswitch is disconnected, and the second microswitch and the third microswitch are converted to a pressing state that causes the motor to rotate forward when energized.

4. The electric operating mechanism according to claim 3, wherein: The slider includes a slider protrusion protruding from the slider body, The location component includes: The first positioning member is slidably mounted to the frame, comprising: a first body formed in a plate shape; a first groove penetrating the first body, cooperating with the slider protrusion, so that the first positioning member can be driven by the slider protrusion; a first actuating portion protruding upward from the first body, The second positioning member is rotatably mounted to the frame and is located above the first positioning member, comprising: a second body formed in a disc shape; a first driven portion and a second driven portion protruding outward from the second body and spaced apart from each other, the first driven portion and the second driven portion being configured to be driven by the first actuating portion in opposite directions, respectively, so that the second positioning member rotates in opposite directions, respectively; a second positive actuating portion and a second counter actuating portion protruding upward from the second body and spaced apart from each other, The third positioning member is rotatably mounted to the frame and is located above the second positioning member, comprising: a third main body formed in a disc shape; a third follower portion protruding downward from the third main body and arranged between the second positive actuating portion and the second counter actuating portion, so that the second positioning member can rotate in opposite directions by respectively cooperating with the second positive actuating portion and the second counter actuating portion and the third follower portion to drive the third positioning member to rotate in opposite directions; the actuating portion is configured to press and disengage the second micro switch and the third micro switch.

5. The electric operating mechanism according to claim 4, wherein: The position assembly further includes a first elastic member, which is a torsion spring, one end of which is fixed to the frame, and the other end of which is fixed to the first position member.

6. The electric operating mechanism according to claim 5, wherein: The second position member comprises: a second groove formed on the second body and extending in the radial direction; Two limiting portions arranged on both sides of the second groove and extending parallel to the second groove; an abutment portion connecting one end of the two limiting portions and close to the rotation axis of the second positioning member, Furthermore, the location component further includes: a rotating rod, the main body of which is formed in a rod shape, one end of which is rotatably mounted to the frame, and the other end of which is configured to move in the second slot; The time-delay elastic member is a compression spring, which is arranged between the two limiting parts and extends parallel to the second groove, with its first end abutting against the other end of the rotating rod and its second end abutting against the abutting part of the second positioning member.

7. The electric operating mechanism according to claim 6, wherein: The position and stroke of the delay elastic member are designed so that, when the first microswitch changes from being on to being off, the second position member has not yet reached the position for causing the second microswitch and the third microswitch to switch states, and the delay elastic member has passed its dead point and is able to apply elastic force to the second position member to cause it to continue rotating to the position for causing the second microswitch and the third microswitch to switch states.

8. The electric operating mechanism according to claim 7, wherein: When the slider is in the open position, the motor is energized for the triggering time, the motor rotates forward, the transmission assembly is driven, and the cam rotates from the position where the cam protrusion is separated from the first micro switch to the position where the cam protrusion abuts against the first micro switch, and the first micro switch is turned on, so that after the triggering time, the motor can continue to rotate forward until the slider reaches the closed position. At the same time, when the slider is about to reach the closed position, the slider protrusion drives the first position member to move through the first groove matched with it, and the first actuating portion of the first position member drives the second position member through the first driven portion matched with it. The second position member rotates, and when the slider reaches the closing position, the cam rotates to the position where the cam protrusion is separated from the first micro switch to disconnect the first micro switch. At this time, the second position member rotates to the position where the time-delay elastic member has passed its dead point. Under the elastic force of the time-delay elastic member, the second position member continues to rotate, so that the second positive actuating portion abuts against and drives the third driven portion to rotate the third position member from the position pressing the second micro switch and the third micro switch to the position separating from the second micro switch and the third micro switch. The second micro switch and the third micro switch are converted to a release state that causes the motor to reverse when powered on. When the slider is in the closed position, the motor is energized for the triggering time, the motor reverses, the transmission assembly is driven, and the cam rotates from the position where the cam protrusion is separated from the first micro switch to the position where the cam protrusion abuts against the first micro switch, and the first micro switch is turned on, so that after the triggering time, the motor can continue to reverse until the slider reaches the open position. At the same time, when the slider is about to reach the open position, the slider protrusion drives the first position member to move through the first groove matched with it, and the first actuating portion of the first position member drives the second position member through the second driven portion matched with it. The part rotates, and when the slider reaches the opening position, the cam rotates to the position where the cam protrusion disengages from the first microswitch to disconnect the first microswitch. At this time, the second position part rotates to the position where the delay elastic part has passed its dead point. Under the elastic force of the delay elastic part, the second position part continues to rotate, so that the second counter-actuating part abuts against and drives the third driven part to rotate the third position part from the position disengaged from the second microswitch and the third microswitch to the position pressing the second microswitch and the third microswitch. The second microswitch and the third microswitch are converted to a pressed state that causes the motor to rotate forward when power is supplied.

9. The electric operating mechanism according to any one of claims 1 to 8, wherein: The cam includes a first drive surface transitioning from the cam body to the cam protrusion and a second drive surface transitioning from the cam protrusion back to the cam body, the first drive surface and the second drive surface being planar.

10. The electric operating mechanism according to claim 9, wherein: The trigger time lasts at least the time for the cam to rotate past the first drive surface or the second drive surface.

11. A switch device, comprising the electric operating mechanism according to any one of claims 1 to 10, wherein: The switch device is one of the following: a molded case circuit breaker, a load switch, a fusion switch of a load switch mechanism type, and a fusion switch of a circuit breaker mechanism type.

12. A fusion switch, comprising the electric operating mechanism according to any one of claims 1 to 10, wherein: When the fusion switch is in the disconnected state and is ready to switch to the pre-charging state, the slider is in the open position, so that the motor is powered on for the trigger time; when the pre-charging of the fusion switch fails, the slider is in the closed position, so that the motor is powered on for the trigger time; when the fusion switch is in the connected state and is ready to switch to the disconnected state, the slider is in the closed position, so that the motor is powered on for the trigger time.

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