CN111477515A - Electric operation device of circuit breaker - Google Patents

Abstract

An electric operating device of a circuit breaker comprises a shell, wherein a driving piece and a transmission mechanism are arranged in the shell; a first sliding groove communicated with the inside of the shell is formed in one side wall of the shell and used as an operating surface, and the driving piece penetrates through the first sliding groove to extend out of the shell and operates a handle of the circuit breaker to switch on or switch off under the driving of the transmission mechanism; the transmission mechanism comprises a motor and a gear set connected with the motor, the gear set comprises a switching-on and switching-off output gear, and the switching-on and switching-off output gear is an elliptic gear. According to the electric operating device of the circuit breaker, the opening and closing output gear of the transmission mechanism is the elliptic gear, so that proper transmission force and lever ratio can be set to enable the driving piece and the circuit breaker to be high in matching performance, and contact burning loss or circuit breaker failure is avoided.

Description

Electric operation device of circuit breaker

Technical Field

The invention relates to the technical field of circuit breakers, in particular to an electric operating device of a circuit breaker.

Background

Miniature circuit breaker is by wide application in low-voltage distribution and switch board, but along with the occasion that needs automatic control and remote control function is more and more, because there is the defect in the aspect of structural design in the electric operating mechanism of current miniature circuit breaker for electric operating mechanism and miniature circuit breaker's cooperation is unreasonable and arouses circuit breaker trouble or problem such as performance unstability.

The opening and closing speed of the electric operating mechanism is one of the causes of the failure of the circuit breaker. When the opening speed of the circuit breaker is too low, the circuit breaker cannot rapidly cut off faults, particularly, the speed is reduced immediately after opening, so that arc quenching time is prolonged easily, contacts are burnt, and an arc extinguishing chamber explodes; if the closing speed is too slow and the breaker is just closed in a short-circuit fault, the breaker cannot overcome closing electric power of the contact, the contact is vibrated or stopped, the contact is burnt and damaged, and the arc extinguish chamber explodes; if the opening and closing speed is too high, the moving mechanism and related components bear overload mechanical stress, and the components may be damaged or deformed, so that the action failure is caused, and the service life is shortened.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the electric operating device of the circuit breaker, which has a simple structure and high reliability.

In order to achieve the purpose, the invention adopts the following technical scheme:

an electric operating device of a circuit breaker comprises a shell, wherein a driving piece and a transmission mechanism are arranged in the shell; a first sliding groove communicated with the inside of the shell is formed in one side wall of the shell and used as an operating surface, and the driving piece penetrates through the first sliding groove to extend out of the shell and operates a handle of the circuit breaker to switch on or switch off under the driving of the transmission mechanism; the transmission mechanism comprises a motor and a gear set connected with the motor, the gear set comprises a switching-on and switching-off output gear, and the switching-on and switching-off output gear is an elliptic gear.

Further, the switching-on and switching-off output gear comprises a switching-on output gear and a switching-off output gear, and the switching-on output gear and the switching-off output gear are elliptic gears.

Further, the switching-on output gear is provided with a switching-on transmission shaft, the switching-off output gear is provided with a switching-off transmission shaft, a sliding rod is installed in the shell, the driving part comprises a switching-on driving part and a switching-off driving part, and the switching-on driving part and the switching-off driving part are installed on the sliding rod;

the switching-on driving part and the switching-off driving part are respectively provided with a switching-on operation part and a switching-off operation part, the switching-on operation part and the switching-off operation part penetrate through the first sliding groove and extend out of the shell, the switching-on driving part is provided with a first linkage groove matched with the switching-on transmission shaft, and the switching-off driving part is provided with a second linkage groove matched with the switching-off transmission shaft;

the switching-on output gear drives the switching-on driving part to move along the sliding rod through the matching of the switching-on transmission shaft and the first linkage groove so as to switch on the handle of the switching-on operating part operating circuit breaker, and the switching-off driving part drives the switching-off driving part to move along the sliding rod through the matching of the switching-off transmission shaft and the second linkage groove so as to switch off the handle of the switching-off operating part operating circuit breaker.

Further, the closing output gear and the opening output gear are meshed with each other, and in the early stage of closing, the long oval edge of the opening output gear is in contact fit with the short oval edge of the closing output gear, so that the closing operation part obtains a large closing driving force; and in the later stage of closing, the short oval edge of the opening output gear is in contact fit with the long oval edge of the closing output gear, so that the closing operation part obtains a higher closing speed.

Further, the opening and closing output gear is a metal elliptic gear.

Further, the gear set also comprises a third-level gear; the switching-on output gear and the third-stage gear are driven by the same rotating shaft, the rotating shaft of the switching-on output gear is eccentrically arranged, the switching-off output gear is meshed with the switching-on output gear, and the rotating shaft of the switching-off output gear is eccentrically arranged; the switching-on output gear is provided with a switching-on transmission shaft connected with the switching-on driving part, and the switching-off output gear is provided with a switching-off transmission shaft connected with the switching-off driving part.

Furthermore, the gear train still includes the control gear, the same axis of rotation installation of control gear and separating brake output gear, be equipped with bellied trigger station on the control gear, a plurality of position identification switch intervals set up on the circumference coaxial with the control gear for cooperate with the trigger station and provide position signal.

Further, the first linkage groove and the second linkage groove both comprise an open end and a closed end; the closed end of the first linkage groove is matched with the closing transmission shaft to drive the first linkage part to move, and the open end of the first linkage groove is used for enabling the closing transmission shaft to rotate out after closing is finished so as to realize separation from the first linkage part; the closed end of the second linkage groove is matched with the opening transmission shaft to drive the second linkage member to move, and the open end of the second linkage member is used for enabling the opening transmission shaft to rotate out after opening is finished so as to realize separation from the second linkage member.

Furthermore, the open end of the first linkage groove is opposite to the open end of the second linkage groove in a staggered mode, the direction from the open end to the closed end of the first linkage groove is opposite to the direction from the open end to the closed end of the second linkage groove, and the closing output gear and the opening output gear are meshed with each other; the first linkage groove comprises a first straight section and a first arc section which are communicated, the first straight section is perpendicular to the sliding rod, the closed end is positioned at the end part of the first straight section, and the open end is positioned at the end part of the first arc section;

the second linkage groove comprises a second straight section and a second arc section which are communicated in sequence, the second straight section is parallel to the sliding rod, the second arc section is close to the semi-circular arc, the closed end is located at the end of the second arc section, one side of the second arc section is an arc side wall, the other side of the second arc section is a linear side wall, and the open end is located at the end of the second straight section.

According to the electric operating device of the circuit breaker, the opening and closing output gear of the transmission mechanism is the elliptic gear, so that proper transmission force and lever ratio can be set, the driving piece can obtain periodically changed driving force and action speed in the opening and closing process, and contact burning loss or circuit breaker failure is avoided.

In addition, the opening and closing output gear consists of a closing output gear and an opening output gear which are meshed with each other, the closing output gear and the opening output gear are elliptic gears made of metal materials, and a gear pair consisting of the non-circular gears can realize a periodically-changed transmission ratio, has a compact structure and good rigidity, and can ensure that the transmission is relatively stable; the oval gear made of metal materials is beneficial to prolonging the service life; the elliptical gear is adopted, so that the switching-on operation part of the driving part can obtain larger switching-on driving force in the early stage of switching-on, and the switching-on operation part can obtain higher switching-on speed in the later stage of switching-on.

Drawings

Fig. 1 is a schematic view of the structure of an electrically operated device of the circuit breaker of the present invention;

fig. 2 is a schematic structural view of a connection face of an electrically operated device of the circuit breaker of the present invention;

fig. 3 is a schematic view of an initial state of an electrically operated device of the circuit breaker of the present invention;

fig. 4 is a schematic diagram of the electrically operated device of the circuit breaker of the present invention at closing time;

fig. 5 is a schematic diagram of the electrically operated device of the circuit breaker of the present invention when opening;

fig. 6 is a schematic view (split type) of the internal structure of the electrically operated device of the circuit breaker of the present invention;

fig. 7 is a schematic view (divided type) of the internal structure of the electrically operated device of the circuit breaker of the present invention;

fig. 8 is a schematic view of the internal structure of the electrically operated device of the circuit breaker of the present invention (split type, without the first cradle);

fig. 9 is a schematic structural view of a second cradle of the electrically operated device of the circuit breaker of the present invention;

fig. 10 is a schematic view (initial state) of the transmission mechanism of the electrically operated device of the circuit breaker of the present invention;

fig. 11 is a schematic view of the transmission mechanism of the electrically operated device of the circuit breaker of the present invention (closed state);

fig. 12 is a schematic view of a closing drive of an electrically operated device of the circuit breaker of the present invention;

figure 13 is a schematic view of a first linkage of the electrically operated device of the circuit breaker of the present invention;

figure 14 is a schematic view of the opening actuator of the electrically operated device of the circuit breaker of the present invention;

FIG. 15 is an exploded view of FIG. 14;

fig. 16 is a schematic view of the opening member of the electrically operated device of the circuit breaker of the present invention (provided with a second interlocking groove);

fig. 17 is a schematic view (integral type) of the driving member of the electric operation device of the circuit breaker of the present invention;

figure 18 is a schematic view (one piece) of the linkage of the electrically operated device of the circuit breaker of the present invention;

fig. 19 is a schematic view of an operating member and a buffer member of the electric operating device of the circuit breaker of the present invention;

fig. 20 is a schematic view (one-piece) of the installation of the driving member of the electrically operated device of the circuit breaker of the present invention;

fig. 21 is a schematic structural view (side close to the second cradle) of a control gear of the electric operation device of the circuit breaker of the present invention;

fig. 22 is a schematic structural view (side close to the first cradle) of a control gear of the electric operation device of the circuit breaker of the present invention.

Detailed Description

The following describes an embodiment of the electrically operated device of a circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 20. The electric operation device of the circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1-5, an electric operating device for a circuit breaker is provided, in which a side wall of a housing 1 is provided with a first sliding groove 101 as an operating surface 11, the first sliding groove 101 is directly opposite to a handle 5 of the circuit breaker, a driving member for driving the handle 5 of the circuit breaker to open and close is installed in the housing 1, a sliding rod 102 is installed in the housing 1, the driving member is installed on the sliding rod 102, and the driving member can extend out of the housing 1 from the first sliding groove 101 and move along the first sliding groove 101 under the operation of a transmission mechanism in the housing 1 to operate the handle 5 of the circuit breaker to open or close.

The driving member includes a closing operation portion 31a and an opening operation portion 31b, as shown in fig. 3, in an initial state, a space is reserved between the closing operation portion 31a and the opening operation portion 31b of the driving member, the closing operation portion 31a is located below the opening operation portion 31b, and the handle 5 of the circuit breaker extends into the space. As shown in fig. 4, when the circuit breaker needs to be closed, the transmission mechanism drives the closing operation part 31a to move upwards along the first chute 101, and pushes the handle 5 of the circuit breaker to close upwards; as shown in fig. 5, when the circuit breaker needs to be opened, the transmission mechanism drives the opening operation part 31b to move downwards, and pushes the handle 5 of the circuit breaker to open the circuit breaker downwards. It should be noted that the up-down arrangement is opposite, and obviously, the opening operation part 31b is located below the closing operation part 31a, and the opening operation part 31b moves upwards to push the handle 5 of the circuit breaker to open. Preferably, in the initial state, that is, when the switching operation is not performed, both the closing operation part 31a and the opening operation part 31b do not contact the handle 5 of the circuit breaker, and after the closing drive or the opening drive drives the handle of the circuit breaker to operate, the circuit breaker can automatically return to the initial state to wait for the next command. The space reserved between the switching-on driving part and the switching-off driving part enables the switching-on driving part and the switching-off driving part not to be in contact with the handle 5 in the initial state, the initial state can be recovered after the switching-on driving part or the switching-off driving part drives the handle 5 to act, and the switching-on driving part or the switching-off driving part is prevented from generating misoperation to cause damage of the circuit breaker. Specifically, when the handle 5 of the switching-on driving part operating circuit breaker is switched on, the handle 5 of the switching-off driving part operating circuit breaker is restored to the initial state, and the handle 5 of the switching-off driving part operating circuit breaker is switched off, the switching-off driving part is restored to the initial state, so that the switching-on action of the switching-off driving part and the switching-on action of the switching-on driving part can be prevented from being interfered by the switching-on driving part.

The electric operating device arranged on the front surface of the breaker handle 5 instead of the side wall of the traditional breaker can be applied to a cabinet with limited transverse space, and the phenomenon that the breaker contacts are asynchronous due to the fact that the breaker is inclined in the process of operating the breaker handle 5 can be avoided, or the phenomenon that each pole of breaker is required to be independently provided with the electric operating device can be avoided.

As an embodiment, the widths of the closing operation part 31a and the opening operation part 31b may be widened as needed, and the handles 5 of the multi-pole circuit breaker may be driven to operate simultaneously.

Preferably, as an embodiment, as shown in fig. 3, a moving device 6 is further disposed on the electric operating device, a side wall opposite to the operating surface 11 is a connecting surface 12 on which the moving device 6 for displacement is mounted, the connecting surface 12 is shown in fig. 2, the electric operating device is mounted on a moving track (not shown in the figure) through the moving device 6, and the moving device 6 can drive the electric operating device to move along the moving track to correspond to the handles 5 of different circuit breakers respectively, so as to drive the different circuit breakers to perform different closing and opening actions.

As an example, as shown in fig. 6 and 7, a cradle is provided in a housing 1 of an electric operation device of a circuit breaker, and divides a space in the housing 1 into a driving space and a transmission space; the bracket specifically comprises a first bracket 103 and a second bracket 104 which are arranged at intervals, a space between the first bracket 103 and the second bracket 104 is used as a transmission space for installing a transmission device, and a space between the first bracket 103 and the operation surface 11 is used as a driving space for installing a driving part. Preferably, a slide bar 102 is installed in the driving space, and a driving member is slidably installed on the slide bar 102 and moves on the slide bar 102 along the first slide groove 101 under the operation of the transmission mechanism. The first bracket 103 and the second bracket 104 divide the space in the housing 1 into two relatively independent parts, so as to provide a working area for the transmission mechanism and the driving member, and avoid performance instability caused by mutual interference of various functional components.

Preferably, drive mechanism includes motor 201 and the gear train be connected with motor 201, the gear train includes divide-shut brake output gear, and divide-shut brake output gear is equipped with the transmission shaft, be equipped with on the driving piece with transmission shaft complex linkage groove, motor 201 drive gear group rotates, through the cooperation in the linkage groove of the transmission shaft of divide-shut brake output gear and driving piece, makes the driving piece slide on slide bar 102 and closes a floodgate or the separating brake with handle 5 of operation circuit breaker. The gear set is installed in a transmission space between the first bracket 103 and the second bracket 104.

Preferably, the transmission ratio of the switching-on/off output gear periodically changes to provide a periodically changing driving force and action speed for the driving member, the periodic transmission ratio of the switching-on/off output gear provides a larger driving force for the driving member in the early stage of switching-on, and provides a larger switching-on speed for the driving member in the later stage of switching-on, so as to reduce burning loss of contacts or faults of the circuit breaker. The optimal scheme is that the switching-on and switching-off output gear is preferably an elliptic gear, so that proper transmission force and lever ratio can be set, the driving part obtains periodically-changed driving force and action speed in switching-on and switching-off, contact burning or circuit breaker failure is avoided, the gear pair formed by the non-circular gears can realize the periodically-changed transmission ratio, the structure is compact, the rigidity is good, and the transmission is guaranteed to be stable. Obviously, the opening and closing output gear can also be a circular gear, but the periodic transmission ratio cannot be obtained.

In the embodiment of fig. 10 and 11, the switching-on/off output gear includes a switching-on output gear 205 and a switching-off output gear 206, the transmission shaft on the switching-on/off output gear includes a switching-on transmission shaft 205a disposed on the switching-on output gear 205 and a switching-off transmission shaft 206a disposed on the switching-off output gear 206, the switching-on transmission shaft 205a is used for operating the switching-on operation portion 31a of the driving member to switch on the handle 5 of the circuit breaker, and the switching-off transmission shaft 206a is used for operating the switching-off operation portion 31b of the driving member to switch off the handle. Preferably, the closing output gear 205 and the opening output gear 206 are engaged with each other, and can be driven and controlled at the same time.

The closing output gear 205 and the opening output gear 206 are preferably elliptical gears made of metal materials, pitch curves of the elliptical gears are elliptical or high-order ellipses, and because central angles corresponding to each gear tooth of the elliptical gears are not always equal, the closing output gear 205 and the opening output gear 206 do non-uniform rotation in the meshing rotation process, and the non-uniform rotation presents periodic rotation speed change. In the early stage of closing, that is, in the period from the start of closing to the time of closing, the long oval side of the opening output gear 206 is in contact fit with the short oval side of the closing output gear 205, so that the closing operation part 31a obtains a large closing driving force; in the later stage of closing, that is, in the period from the time of closing to the time of complete closing, the short oval side of the opening output gear 206 is in contact fit with the long oval side of the closing output gear 205, so that the closing operation part 31a obtains a faster closing speed; in the rotating process, the center distance is fixed, so that the closing output gear 205 and the opening output gear 206 are kept in good engagement constantly, and meanwhile, the transmission force and the action process of the lever and the circuit breaker are matched, so that the closing moment is fast, namely, the closing force in the early closing stage is increased at the moment when the moving contact is contacted with the fixed contact. The gear pair composed of the non-circular gears is adopted for the closing output gear 205 and the opening output gear 206, so that the periodically-changed transmission ratio can be realized, the structure is compact, the rigidity is good, and the stable transmission can be ensured; the oval gear made of metal materials is beneficial to prolonging the service life. Obviously, the closing output gear 205 and the opening output gear 206 can also be circular gears, but they cannot obtain a periodic transmission ratio.

Specifically, the gear set further comprises a primary gear 202, a secondary gear 203 and a tertiary gear 204; the motor 201 is meshed with a first-stage gear 202 through a worm, the first-stage gear 202 is meshed with a second-stage gear 203, the second-stage gear 203 is meshed with a third-stage gear 204, and a switching-on and switching-off output gear is mounted on the third-stage gear 204; as shown in fig. 8, 10 and 11, the third-stage gear 204 is provided with a closing output gear 205 and an opening output gear 206, the closing output gear 205 and the opening output gear 206 are engaged with each other, the closing output gear 205 and the third-stage gear 204 are driven by the same rotating shaft, the rotating shaft of the closing output gear 205 is eccentrically arranged, that is, the rotating shaft of the closing output gear 205 is not arranged at the center of the closing output gear 205, the opening output gear 206 is engaged with the closing output gear 205, the rotating shaft of the opening output gear 206 is eccentrically arranged, that is, the rotating shaft of the opening output gear 206 is not arranged at the center of the opening output gear 206, the closing output gear 205 is provided with a closing transmission shaft 205a, the opening output gear 206 is provided with an opening transmission shaft 206a, and the eccentric arrangement keeps the rotating centers of the two elliptic gears at a certain distance. Of course, the three-stage gear 204 and the opening output gear 206 may be driven by the same rotating shaft, and the closing output gear 205 may be driven by the opening output gear 206 to rotate.

As shown in fig. 21 and 22, the transmission mechanism further includes a control gear 207 and a plurality of position recognition switches, the control gear 207 is provided with a raised trigger platform 207a, the plurality of position recognition switches are fixedly installed in the housing 1 and are arranged on a circumference coaxial with the control gear 207 at intervals, preferably at a position close to one side of the second support 104 (see fig. 6 and 7 of the second support 104), and the plurality of position recognition switches are respectively used for cooperating with the trigger platform 207a to provide position signals to control the forward rotation, the reverse rotation and the stop rotation of the motor. The plurality of position recognition switches include an initial position recognition switch 208a, a closing position recognition switch 208b, and an opening position recognition switch 208 c; the control gear 207 and the opening output gear 206 are installed on the same rotating shaft, and the opening output gear 206 rotates to drive the control gear 207 to rotate. The motor 201 sequentially drives the closing output gear 205, the opening output gear 206 and the control gear 207 to rotate.

A switching-on process: when the motor 201 drives the closing output gear 205 to rotate in the closing direction under the transmission of the primary gear 202, the secondary gear 203, and the tertiary gear 204, taking the closing output gear to rotate counterclockwise (see the direction of fig. 22), at this time, the opening output gear 206, the control gear 207, and the trigger stage 207a all rotate clockwise (see the direction of fig. 21 as counterclockwise), the trigger stage 207a rotates from the initial position identification switch 208a to the closing position identification switch 208b, the closing output gear 205 makes the closing operation part 31a of the closing driving member operate the handle 5 of the circuit breaker through the closing transmission shaft 205a, when the trigger stage 207a triggers the closing position identification switch 208b, the motor 201 is controlled to rotate in the opening direction in reverse, when the trigger stage 207a triggers the initial position identification switch 208a, the closing operation part 31a is controlled to return to the initial position, the motor 201 stops rotating.

The brake opening process: when the motor 201 drives the closing output gear 205 to rotate towards the opening direction under the transmission of the primary gear 202, the secondary gear 203 and the tertiary gear 204, taking the clockwise rotation of the closing output gear 205 (see the direction of fig. 22) as an example, at this time, the opening output gear 206, the control gear 207 and the trigger stage 207a all rotate counterclockwise (see the direction of fig. 21 as clockwise rotation), the trigger stage 207a rotates from the initial position identification switch 208a to the opening position identification switch 208c, the opening output gear 206 rotates in the opening direction, and the opening operation portion 31b operates the handle 5 of the circuit breaker to open through the opening transmission shaft 206a, when the trigger stage 207a triggers the switch-off position recognition switch 208c, the motor 201 is controlled to rotate in the reverse direction to the switch-on direction, when the trigger base 207a triggers the initial position identification switch 208a, the opening operation portion 31b is controlled to return to the initial position.

The invention provides in-place signals of closing, opening and initial positions through a plurality of position identification switches to control the positive rotation and the reverse rotation of the motor, the position identification switches and the control motor 201 can be respectively connected with a control circuit, the control circuit can be realized through a circuit or a single chip microcomputer, and the control circuit can be arranged in the shell 1 or outside the object 1 and controlled in a remote mode.

As an implementation, be equipped with the transmission shaft on the drive mechanism, the driving piece includes closing drive spare and separating brake driving piece, closing drive spare and separating brake driving piece are equipped with closing operation portion 31a and separating brake operation portion 31b respectively, closing drive spare and separating brake driving piece are equipped with the linkage groove respectively, and the linkage groove of both is equipped with the uncovered of opposite direction and is used for periodicity and drive mechanism's transmission shaft cooperation, separation. Preferably, the driving part comprises a linkage part connected with the transmission mechanism, and a linkage groove is formed in the linkage part and used for being connected with the transmission shaft.

The linkage groove of the driving part can convert the circular motion of the switching-on and switching-off output gear into linear motion, the driving part does linear motion in the first sliding groove 101 under the coordination of the linkage groove and the transmission shaft, the switching-on operation part 31a and the switching-off operation part 31b of the driving part respectively operate the switching-on and switching-off of the handle 5 of the circuit breaker, and the linear motion of the driving part is preferably carried out along the sliding rod 102. Specifically, as shown in fig. 8, the linkage groove of the switching-on driving member is a first linkage groove 30a, and the linkage groove of the switching-off driving member is a second linkage groove 30c, and when the transmission shaft is matched with the first linkage groove 30a on the switching-on driving member, the transmission shaft is separated from the second linkage groove 30c of the switching-off driving member to prevent the switching-off driving member from generating false operation; when the transmission shaft is engaged with the second interlocking groove 30c of the opening driving member, the transmission shaft is separated from the first interlocking groove 30a of the closing driving member to prevent the closing driving member from generating a malfunction.

Specifically, as shown in fig. 8, 13, and 15, the transmission shaft includes a closing transmission shaft 205a and an opening transmission shaft 206a, the first linkage groove 30a and the second linkage groove 30c both include a closed end and an open end, the closed end of the first linkage groove 30a cooperates with the closing transmission shaft 205a to drive the first linkage member to move, and the open end of the first linkage groove 30a is used to enable the closing transmission shaft 205a to rotate out after closing is completed so as to separate from the first linkage member, thereby preventing the closing operation portion 31a from generating a malfunction during opening; similarly, the closed end of the second linking groove 30c cooperates with the opening transmission shaft 206a to drive the second linking member to move, and the open end of the second linking member is used to enable the opening transmission shaft 206a to rotate out after opening, so as to realize separation from the second linking member, thereby preventing the opening operation part 31b from generating misoperation during closing.

Specifically, as shown in fig. 7 and 8, the driving member includes a linkage member and an operating member driven by the linkage member, the transmission mechanism is connected to the linkage member, the linkage member is mounted on the sliding rod 102, the operating member is linked to the linkage member, a linkage groove is formed in the linkage member for connecting to the transmission shaft, and the operating member is provided with a closing operation portion 31a and an opening operation portion 31 b. The linkage member specifically comprises a first linkage member and a second linkage member, the first linkage member is provided with a first linkage groove 30a periodically matched with the switching-on transmission shaft 205a, and the second linkage member is provided with a second linkage groove 30c periodically matched with the switching-off transmission shaft 206 a; the operation element includes a closing member provided with a closing operation portion 31a and an opening member provided with an opening operation portion 31 b. Preferably, an elastic buffer 4 is arranged between the linkage and the operating element, and the elastic buffer 4 is used for absorbing the switching-on and switching-off allowance and preventing the handle 5 from being subjected to hard impact by the switching-on operation part 31a and the switching-off operation part 31b, so that the handle 5 cannot be accurately pushed to the position and even is broken. Of course, the elastic buffer 4 may not be provided, or may be provided only on the closing driving member, and the opening driving member may be omitted.

As shown in fig. 12 and 14, the driving members include a closing driving member provided with a closing operation portion 31a and an opening driving member provided with an opening operation portion 31b, and the closing member and the opening member are operating members driven by the link member. Specifically, the switching-on driving member includes a first linkage member and a switching-on member, the first linkage member is mounted on the sliding rod 102, the switching-on member is mounted on the sliding rod 102 and is linked with the first linkage member, the first linkage member is provided with a first linkage groove 30a matched with the switching-on transmission shaft 205a, the switching-on member is provided with a switching-on operation part 31a for operating the handle 5 of the circuit breaker, and an elastic buffer member 4 is preferably arranged between the first linkage member and the switching-on member; the opening driving part comprises a second linkage part and an opening part, the second linkage part is arranged on the sliding rod 102, the opening part is arranged on the sliding rod 102 and is linked with the second linkage part, a second linkage groove 30c matched with the opening transmission shaft 206a is arranged on the second linkage part, an opening operation part 31b used for operating a handle 5 of the circuit breaker is arranged on the opening part, and an elastic buffer part 4 is preferably arranged between the second linkage part and the opening part.

The switching-on driving part and the switching-off driving part are arranged independently, and the switching-on driving part and the switching-off driving part are respectively driven by the transmission mechanism to switch on and switch off a handle 5 for operating the circuit breaker. As shown in fig. 6, a compression spring 7 is disposed between the closing driving member and the opening driving member, and the compression spring 7 is used for assisting the resetting of the closing driving member and the opening driving member, and reducing the clearance effect when the closing driving member and the opening driving member are matched; the linear motion of the switching-on driving part in the switching-on process enables the compression spring 7 to deform and store energy, and after the switching-on is finished, the elasticity of the compression spring 7 provides auxiliary driving force for the switching-on driving part to return to the initial position; in a similar way, the linear motion of the opening driving piece in the opening process enables the compression spring 7 to deform and store energy, and the elastic force of the compression spring 7 provides auxiliary driving force for the opening driving piece to return to the initial position. Preferably, the sliding rod 102 between the closing driving member and the opening driving member is sleeved with a compression spring 7, which can be used as the compression spring 7 or can provide a driving force for the resetting of the first linkage member and the second linkage member, so as to ensure the resetting speed.

As shown in fig. 13, the first linkage member is formed by sequentially connecting a first linkage wall 301, a third linkage wall 303 and a second linkage wall 302 to form a U-shaped structure with an opening facing the first sliding chute 101, through holes for the sliding rod 102 to pass through are formed on the opposite first linkage wall 301 and second linkage wall 302, and a connecting groove 30b for connecting and engaging the brake member is formed on the first linkage wall 301; the third linkage wall 303 is provided with a first linkage groove 30a, the inner diameters of the first linkage groove 30a are substantially equal, the first linkage groove 30a has a closed end and an open end, the first linkage groove 30a includes a first straight section and a first arc section which are communicated, the first straight section is perpendicular to the sliding rod 102, the first arc section is in a shape of a quarter arc, the closed end is located at the end of the first straight section, the first straight section is parallel to the first linkage wall 301, the open end is located at the end of the first arc section, the open end is arranged at the connection position of the second linkage wall 302 and the third linkage wall 303, and when the motor 201 rotates to drive the closing output gear 205 of the transmission mechanism to rotate in the closing direction, the closing transmission shaft 205a rotates into the first linkage groove 30a from the open end of the first linkage groove 30a and rotates along the first linkage groove 30 a.

As shown in fig. 12, the closing element is preferably smaller than the first link member and is disposed inside the first link member, the closing member is formed by connecting a first side wall 311, a first connecting wall 315 and a second side wall 312 in sequence to form a U-shaped structure, through holes for passing through the sliding rod 102 are formed on the opposite first side wall 311 and second side wall 312, the first connecting wall 315 passes through the connecting groove 30b of the first linkage member to enable the second side wall 312 of the closing member to be positioned inside the first linkage member, an elastic buffer 4 is sleeved on the sliding rod 102 between the second side wall 312 and the first linkage, a closing operation part 31a for operating the circuit breaker handle 5 to close is arranged on the first side wall 311 or the second side wall 312, the closing operation part 31a protrudes from the first sliding chute 101 and is preferably formed by extending a middle edge of the first sidewall 311 toward the first sliding chute 101, and an end of the closing operation part 31a is bent downward.

As shown in fig. 15, the second linkage member is formed by sequentially connecting a fourth linkage wall 304, a sixth linkage wall 306 and a fifth linkage wall 305 to form a U-shaped structure, through holes for the sliding rod 102 to pass through are formed in the fourth linkage wall 304 and the fifth linkage wall 305 which are opposite to each other, an arc-shaped second linkage groove 30c is formed in the sixth linkage wall 306, and the opening transmission shaft 206a extends into the second linkage groove 30c to drive the second linkage member to move. The second linkage groove 30c includes a second straight section and a second arc section which sequentially include the communication, the second straight section is parallel to the sliding rod 102, the second arc section is close to the semicircle arc shape, the closed end is located at the end of the second arc section, one side of the second arc section is an arc side wall, the other side is a straight side wall, the open end is located at the end of the second straight section, and the opening of the open end is arranged at the joint of the fourth linkage wall 304 and the sixth linkage wall 306. When the opening transmission shaft 206a rotates from the open end to the closed end along the arc side wall to drive the second linkage member to move, then rotates out along the linear side wall to separate from the second linkage member, and misoperation is prevented during closing.

The opening member is arranged in the second linkage member, the opening member is formed by sequentially connecting a third side wall 313, a second connecting wall 316 and a fourth side wall 314 to form a U-shaped structure, through holes for the sliding rod 102 to pass through are formed in the opposite third side wall 313 and fourth side wall 314, an opening operation part 31b for opening the handle 5 of the circuit breaker is arranged on the third side wall 313 or the fourth side wall 314, preferably, the opening operation part 31b is integrally formed by the third side wall 313, the opening operation part 31b is integrally formed into a U-shaped body with an upward opening, and the U-shaped body is provided with a long side wall for being connected with the third side wall 313 and a short side wall for being contacted with the handle 5 of the circuit breaker. The opening member is located between the fourth linkage wall 304 and the fifth linkage wall 305, and the sliding rod 102 located between the fourth side wall 314 and the fourth linkage wall 304 is sleeved with an elastic buffer member 4, and the elastic buffer member 4 is preferably a spring.

Specifically, as an embodiment, as shown in fig. 6 and 16, the second linking groove 30c may be disposed on the second linking wall 315 of the opening member, and no linking member is disposed, the opening of the opening end of the second linking groove 30c is disposed at the connection position of the third side wall 313 and the second linking wall 316, and the opening end of the second linking groove 30c is disposed at the connection position of the second linking groove 30c and the second linking wall 316, so that the second linking member and the elastic buffer member 4 disposed between the second linking member and the opening member can be omitted, and the opening member in fig. 6 is the one in which the second linking member and the elastic buffer member 4 are omitted.

It should be noted that, since the closing output gear 205 and the opening output gear 206 are engaged with each other and the rotation directions of the two are opposite, the open ends of the first and second linking grooves 30a and 30c are misaligned and opposite to each other, the closed ends of the two are misaligned and opposite to each other, and the direction from the open end to the closed end of the first linking groove 30a is opposite to the direction from the open end to the closed end of the second linking groove 30c and the rotation directions of the two are opposite to each other. As shown in fig. 8, the closed end of the first linking groove 30a is on the left of the first linking member, and the closed end of the second linking groove 30c is on the right of the second linking member; the open end of the first linking groove 30a is positioned at the upper right of the first linking member, and the open end of the second linking groove 30c is positioned at the lower left of the second linking member.

As shown in the embodiment of fig. 17 to 20, a linkage and an operation member are used, and the closing operation portion 31a and the opening operation portion 31b are integrated. The driving part comprises a linkage part and an operating part, the linkage part is matched with the transmission mechanism, the linkage part is arranged on the sliding rod 102, the operating part is arranged on the sliding rod 102 and is linked with the linkage part, and an elastic buffer part 4 is arranged between the linkage part and the operating part; the linkage piece is provided with a linkage groove 3a, and the operating piece comprises a closing operation part 31a and a breaking operation part 31b which are connected together; the switching-on and switching-off output gear of the transmission mechanism is provided with a transmission shaft, the transmission shaft is matched with the linkage groove 3a to drive the driving piece to do linear motion along the sliding rod 102, the switching-on operation part of the operation piece is used for switching on the handle 5 of the operation circuit breaker, and the switching-off operation part is used for switching off the handle 5 of the operation circuit breaker.

In this embodiment, the transmission mechanism only needs to be provided with one opening and closing output gear, and does not need to be provided with the closing output gear 205 and the opening output gear 206, respectively, the opening and closing output gear is provided with an opening and closing transmission shaft, the opening and closing output gear can be a circular gear, the opening and closing transmission shaft is connected with the linkage groove 3a of the linkage member, the handle 5 of the circuit breaker is closed by operating the closing operation part 31a, and the handle 5 of the circuit breaker is opened by operating the opening operation part 31 b.

As shown in fig. 17 and 18, the linkage member is formed by connecting two transverse linkage walls 31 and a vertical linkage wall 32 to form a U-shaped structure with an opening facing the first sliding chute 101, the two transverse linkage walls 31 are provided with through holes for the sliding rod 102 to pass through, the vertical linkage wall 32 is provided with a linkage groove 3a, and the linkage groove 3a is matched with the transmission mechanism to enable the linkage member to drive the driving member to move along the sliding rod 102 to operate the opening or closing of the handle 5 of the circuit breaker. Preferably, the linkage groove 3a arranged on the vertical linkage wall 32 is a strip-shaped linkage groove 3a with two closed ends, the central axis of the linkage groove 3a is perpendicular to the sliding rod 102, and the opening and closing transmission shaft extends into the linkage groove 3a to drive the linkage part to move linearly along the sliding rod.

As shown in fig. 19, in an embodiment, the operating element is disposed inside the linkage and extends out of the first sliding chute 101 to operate the handle 5 of the circuit breaker, the operating element includes a closing side wall and an opening side wall, the closing side wall and the opening side wall are connected to form a U-shaped structure with an opening facing the first sliding chute 101, the closing side wall and the opening side wall are provided with through holes for the sliding rod 102 to pass through, the sliding rod 102 between the closing side wall and one transverse linkage wall 31 is sleeved with an elastic buffer 4, the edge of the closing side wall is used as a closing operation portion 31a, the sliding rod 102 between the opening side wall and the other transverse linkage wall 31 is sleeved with an elastic buffer 4, the edge of the opening side wall is used as an opening operation portion 31b, in order to save space and increase the distance between the closing operation portion 31a and the opening operation portion 31b, the closing side wall and the opening side wall are preferably stepped, therefore, the closing side wall and the opening side wall are connected to form a symmetrical U-shaped structure with an opening gradually enlarged, and the through holes for the sliding rod 102 to pass through on the closing side wall and the opening side wall are arranged on one side close to the linkage part.

The driving piece can be a separate opening driving piece and an opening driving piece which are arranged independently, and can also be an integrated driving piece, so that the type of the driving piece can be designed according to the requirement of a handle of the circuit breaker, and the electric operating device of the circuit breaker has wide applicability.

In order to optimally divide the space in the housing 1, it is preferable that the first and second brackets 103 and 104 divide the space in the housing 1 into a driving space and a transmission space, and as shown in fig. 6 and 7, a first engaging portion 103a and a second engaging portion 103b are provided at the lower end and the upper end of the first bracket 103, respectively, the first and second engaging portions 103a and 103b are formed by bending the lower end and the upper end of the first bracket 103 in the direction of the operation surface 11, respectively, and a mounting area for mounting the slide lever 102 is provided between the first and second engaging portions 103a and 103 b.

The second bracket 104 is provided with two connecting ear plates 104a for mounting the mobile device 6 as shown in fig. 9, the number of the connecting ear plates 104a is two as shown in fig. 2, the two connecting ear plates 104a are oppositely arranged on one side of the second bracket 104 close to the connecting surface 12, the connecting surface 12 is provided with a through hole for the connecting ear plate 104a to penetrate out, the mobile device 6 is fixedly mounted between the two connecting ear plates 104a penetrating out of the housing 1, and the number of the connecting ear plates 104a is not limited to two; a limiting plate 104b is arranged at one end of the second bracket 104, and the limiting plate 104b is used for limiting the transmission mechanism.

The transmission mechanism comprises a motor 201 and a gear set connected with the motor 201, and the gear set is arranged in a transmission space between the first bracket 103 and the second bracket 104; the second support 104 is longer than the first support 103, and the motor 201 is mounted between the second support 104 and the first support 103 and at a position below the first positioning portion 103a of the first support 103; the middle parts of the upper end and the lower end of the second bracket 104 are bent towards the direction of the connecting surface 12 to form connecting lug plates 104 a; a side wall beside the connecting ear plate 104a extends towards the middle part and bends towards the direction of the operating surface 11 to form a bent limiting plate 104b, an arc-shaped groove in a transmission mechanism matched with the motor 201 is arranged in the middle part of the bent limiting plate 104b, the arc-shaped groove is specifically used for penetrating through a rotating shaft of the motor 201, and preferably, the arc-shaped groove is arranged at the lower side of the limiting plate 104b to be beneficial to the stable installation of the motor 201; be equipped with a plurality of mounting holes that are used for installing the gear train on the face of second support 104, set up the limiting plate 104b that connects otic placode 104a and be used for fixed motor 201 who wears out casing 1 on second support 104, make second support 104 stably be fixed in the casing 1 of circuit breaker, do benefit to and provide stable operational environment for drive mechanism.

Furthermore, the first support 103 and the second support 104 are preferably made of metal materials, which is beneficial to increase the use strength and prolong the service life.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (10)

1. An electrically operated device of a circuit breaker, comprising a housing (1), characterized in that: a driving piece and a transmission mechanism are arranged in the shell (1); one side wall of the shell (1) is used as an operation surface (11) and is provided with a first sliding groove (101) communicated with the interior of the shell (1), and the driving piece penetrates through the first sliding groove (101) to extend out of the shell (1) and operates a handle (5) of the circuit breaker to switch on or switch off under the driving of the transmission mechanism; the transmission mechanism comprises a motor (201) and a gear set connected with the motor (201), the gear set comprises a switching-on and switching-off output gear, and the switching-on and switching-off output gear is an elliptic gear.

2. The electrically operated device of a circuit breaker according to claim 1, characterized in that: the switching-on and switching-off output gear comprises a switching-on output gear (205) and a switching-off output gear (206), and the switching-on output gear (205) and the switching-off output gear (206) are both elliptic gears.

3. The electrically operated device of a circuit breaker according to claim 2, characterized in that:

the switching-on output gear (205) is provided with a switching-on transmission shaft (205a), the switching-off output gear (206) is provided with a switching-off transmission shaft (206a), a sliding rod (102) is installed in the shell (1), the driving part comprises a switching-on driving part and a switching-off driving part, and the switching-on driving part and the switching-off driving part are installed on the sliding rod (102);

the switching-on driving part and the switching-off driving part are respectively provided with a switching-on operation part (31a) and a switching-off operation part (31b), the switching-on operation part (31a) and the switching-off operation part (31b) penetrate through the first sliding groove (101) and extend out of the shell (1), the switching-on driving part is provided with a first linkage groove (30a) matched with the switching-on transmission shaft (205a), and the switching-off driving part is provided with a second linkage groove (30c) matched with the switching-off transmission shaft (206 a);

the switching-on output gear (205) drives the switching-on driving part to move along the sliding rod (102) through the matching of the switching-on transmission shaft (205a) and the first linkage groove (30a) so that the switching-on operating part (31a) operates the handle (5) of the circuit breaker to switch on, and the switching-off driving part drives the switching-off driving part to move along the sliding rod (102) through the matching of the switching-off transmission shaft (206a) and the second linkage groove (30c) so that the switching-off operating part (31b) operates the handle (5) of the circuit breaker to switch off.

4. The electrically operated device of a circuit breaker according to claim 2, characterized in that: the closing output gear (205) and the opening output gear (206) are meshed with each other, and in the early stage of closing, the long oval side of the opening output gear (206) is in contact fit with the short oval side of the closing output gear (205), so that the closing operation part (31a) obtains a large closing driving force; in the later stage of closing, the short elliptic side of the opening output gear (206) is in contact fit with the long elliptic side of the closing output gear (205), so that the closing operation part (31a) obtains a high closing speed.

5. The electrically operated device of a circuit breaker according to claim 1, characterized in that: the opening and closing output gear is a metal elliptic gear.

6. The electrically operated device of a circuit breaker according to claim 2, characterized in that: the gear set further includes a tertiary gear (204); the closing output gear (205) and the three-stage gear (204) are driven by the same rotating shaft, the rotating shaft of the closing output gear (205) is eccentrically arranged, the opening output gear (206) is meshed with the closing output gear (205), and the rotating shaft of the opening output gear (206) is eccentrically arranged; and a closing transmission shaft (205a) used for being connected with the closing driving part is arranged on the closing output gear (205), and an opening transmission shaft (206a) used for being connected with the opening driving part is arranged on the opening output gear (206).

7. The electrically operated device of a circuit breaker according to claim 6, wherein: the gear set further comprises a control gear (207), the control gear (207) and the opening output gear (206) are mounted on the same rotating shaft, a protruding trigger table (207a) is arranged on the control gear (207), and a plurality of position recognition switches are arranged on the circumference coaxial with the control gear (207) at intervals and used for being matched with the trigger table (207a) to provide position signals.

8. The electrically operated device of a circuit breaker according to claim 3, characterized in that: the first linkage groove (30a) and the second linkage groove (30c) each comprise an open end and a closed end; the closed end of the first linkage groove (30a) is matched with the closing transmission shaft (205a) to drive the first linkage part to move, and the open end of the first linkage groove (30a) is used for enabling the closing transmission shaft (205a) to rotate out after closing is finished so as to realize separation from the first linkage part; the closed end of the second linkage groove (30c) is matched with the opening transmission shaft (206a) to drive the second linkage member to move, and the open end of the second linkage member is used for enabling the opening transmission shaft (206a) to rotate out after opening is finished so as to realize separation from the second linkage member.

9. The electrically operated device of a circuit breaker according to claim 8, wherein: the open end of the first linkage groove (30a) is opposite to the open end of the second linkage groove (30c) in a staggered mode, the direction from the open end to the closed end of the first linkage groove (30a) is opposite to the direction from the open end to the closed end of the second linkage groove (30c), and the closing output gear (205) and the opening output gear (206) are meshed with each other.

10. The electrically operated device of a circuit breaker according to claim 9, wherein: the first linkage groove (30a) comprises a first straight section and a first arc section which are communicated, the first straight section is perpendicular to the sliding rod (102), the closed end is positioned at the end part of the first straight section, and the open end is positioned at the end part of the first arc section;

the second linkage groove (30c) comprises a second straight section and a second arc section which are communicated in sequence, the second straight section is parallel to the sliding rod (102), the second arc section is close to the semicircle and is arc-shaped, the closed end is positioned at the end part of the second arc section, one side of the second arc section is an arc side wall, the other side of the second arc section is a linear side wall, and the open end is positioned at the end part of the second straight section.

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