Electrical operating device of circuit breaker

Abstract

An electric operating device for a circuit breaker, comprising a housing, wherein a driving member and a transmission mechanism are installed inside the housing; a first chute communicating with the inside of the housing is provided on one side wall of the housing as an operating surface, and the driving member passes through the first chute and extends outside the housing, and operates the handle of the circuit breaker to close or open under the drive of the transmission mechanism; the transmission mechanism includes a motor and a gear set connected to the motor, the gear set includes a closing and opening output gear, and the closing and opening output gear is an elliptical gear. For the electric operating device of the circuit breaker of the present invention, the closing and opening output gear of the transmission mechanism is an elliptical gear, so that an appropriate transmission force and leverage ratio can be set to make the cooperation between the driving member and the circuit breaker relatively high, and avoid contact burnout or circuit breaker failure.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and particularly to an electric operating device for a circuit breaker. Background Art

[0002] Miniature circuit breakers are widely used in low-voltage power distribution and control cabinets. However, with the increasing number of occasions requiring automatic control and remote control functions, due to defects in the structural design of the existing electric operating mechanisms of miniature circuit breakers, the cooperation between the electric operating mechanism and the miniature circuit breaker is unreasonable, resulting in problems such as circuit breaker failures or unstable performance.

[0003] The opening and closing speeds of the electric operating mechanism are one of the causes of circuit breaker failures. If the opening speed of the circuit breaker is too slow, it cannot quickly cut off the fault. Especially when the speed decreases just after opening, it is easy to prolong the arc extinguishing time, resulting in contact burnout and explosion of the arc extinguishing chamber. If the closing speed is too slow, and exactly when the circuit breaker closes on a short-circuit fault, the circuit breaker cannot overcome the closing electrodynamic force of the contacts, causing the contacts to vibrate or stay stagnant, which will also lead to contact burnout and explosion of the arc extinguishing chamber. If the opening and closing speeds are too fast, the moving mechanism and related components will bear overload mechanical stresses, which may cause damage or deformation of each component, resulting in malfunction and shortening of the service life. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide an electric operating device for a circuit breaker with a simple structure and high reliability.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An electric operating device for a circuit breaker includes a housing, and a driving member and a transmission mechanism are installed inside the housing; a first chute communicating with the inside of the housing is provided on one side wall of the housing as an operating surface, and the driving member passes through the first chute and extends outside the housing and operates the handle of the circuit breaker to close or open under the drive of the transmission mechanism; the transmission mechanism includes a motor and a gear set connected to the motor, and the gear set includes a closing and opening output gear, and the closing and opening output gear is an elliptical gear.

[0007] Further, the closing and opening output gear includes a closing output gear and an opening output gear, and both the closing output gear and the opening output gear are elliptical gears.

[0008] Further, the closing output gear is provided with a closing transmission shaft, the opening output gear is provided with an opening transmission shaft, a sliding rod is installed inside the housing, and the driving member includes a closing driving member and an opening driving member, and the closing driving member and the opening driving member are installed on the sliding rod;

[0009] The closing driving member and the opening driving member are respectively provided with a closing operation portion and an opening operation portion. The closing operation portion and the opening operation portion extend out of the housing through the first sliding groove. The closing driving member is provided with a first linkage groove for cooperating with the closing transmission shaft, and the opening driving member is provided with a second linkage groove for cooperating with the opening transmission shaft.

[0010] The closing output gear drives the closing driving member to move along the sliding rod through the cooperation of the closing transmission shaft and the first linkage groove, so that the closing operation portion operates the handle of the circuit breaker to close. The opening driving member drives the opening driving member to move along the sliding rod through the cooperation of the opening transmission shaft and the second linkage groove, so that the opening operation portion operates the handle of the circuit breaker to open.

[0011] Furthermore, the closing output gear and the opening output gear mesh with each other. In the early stage of closing, the long side of the ellipse of the opening output gear contacts and cooperates with the short side of the ellipse of the closing output gear, so that the closing operation portion obtains a larger closing driving force. In the later stage of closing, the short side of the ellipse of the opening output gear contacts and cooperates with the long side of the ellipse of the closing output gear, so that the closing operation portion obtains a faster closing speed.

[0012] Furthermore, the closing and opening output gears are metal elliptical gears.

[0013] Furthermore, the gear set further includes a third-stage gear. The closing output gear and the third-stage gear are driven by the same rotating shaft. The rotating shaft of the closing output gear is eccentrically arranged. The opening output gear meshes with the closing output gear. The rotating shaft of the opening output gear is eccentrically arranged. The closing output gear is provided with a closing transmission shaft for connecting with the closing driving member, and the opening output gear is provided with an opening transmission shaft for connecting with the opening driving member.

[0014] Furthermore, the gear set further includes a control gear. The control gear is installed on the same rotating shaft as the opening output gear. The control gear is provided with a protruding trigger platform. A plurality of position recognition switches are arranged at intervals on the circumference coaxial with the control gear for cooperating with the trigger platform to provide position signals.

[0015] Furthermore, both the first linkage groove and the second linkage groove include an open end and a closed end. The closed end of the first linkage groove cooperates with the closing transmission shaft to drive the first linkage member to move. The open end of the first linkage groove is used for the closing transmission shaft to be able to rotate out after closing is completed so as to realize separation from the first linkage member. The closed end of the second linkage groove cooperates with the opening transmission shaft to drive the second linkage member to move. The open end of the second linkage member is used for the opening transmission shaft to be able to rotate out after opening is completed so as to realize separation from the second linkage member.

[0016] Further, the open ends of the first linkage groove and the second linkage groove are offset relative to each other, and 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. The closing output gear and the opening output gear are engaged with each other. The first linkage groove includes a connected first straight section and a first arc section. The first straight section is perpendicular to the sliding rod. The closed end is located at the end of the first straight section, and the open end is located at the end of the first arc section.

[0017] The second linkage groove includes a second straight section and a second arc section that are sequentially connected. The second straight section is parallel to the sliding rod. The second arc section is approximately semi-circular in 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, and the other side is a straight side wall. The open end is located at the end of the second straight section.

[0018] In the electric operating device of the circuit breaker of the present invention, the closing and opening output gears of the transmission mechanism are elliptical gears. In this way, appropriate transmission force and lever ratio can be set, so that the driving member obtains periodically changing driving force and action speed during closing and opening, avoiding contact burning or circuit breaker failure.

[0019] In addition, the closing and opening output gears are composed of two closing output gears and opening output gears that are engaged with each other. The closing output gear and the opening output gear are elliptical gears made of metal material. The gear pair composed of such non-circular gears can achieve a periodically changing transmission ratio, has a compact structure, good rigidity, and can ensure relatively stable transmission. The elliptical gears made of metal material are beneficial to extending the service life. Using elliptical gears can enable the closing operation part of the driving member to obtain a larger closing driving force in the early stage of closing, and the closing operation part to obtain a faster closing speed in the later stage of closing. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the electric operating device of the circuit breaker of the present invention;

[0021] Figure 2 is a schematic structural diagram of the connection surface of the electric operating device of the circuit breaker of the present invention;

[0022] Figure 3 is a schematic diagram of the initial state of the electric operating device of the circuit breaker of the present invention;

[0023] Figure 4 is a schematic diagram when the electric operating device of the circuit breaker of the present invention is closing;

[0024] Figure 5 is a schematic diagram when the electric operating device of the circuit breaker of the present invention is opening;

[0025] Figure 6 is a schematic internal structure diagram (split type) of the electric operating device of the circuit breaker of the present invention;

[0026] Figure 7 It is a schematic diagram of the internal structure of the electric operating device of the circuit breaker of the present invention (split type);

[0027] Figure 8 It is a schematic diagram of the internal structure of the electric operating device of the circuit breaker of the present invention (split type, without the first bracket);

[0028] Figure 9 It is a schematic diagram of the structure of the second bracket of the electric operating device of the circuit breaker of the present invention;

[0029] Figure 10 It is a schematic diagram of the transmission mechanism of the electric operating device of the circuit breaker of the present invention (initial state);

[0030] Figure 11 It is a schematic diagram of the transmission mechanism of the electric operating device of the circuit breaker of the present invention (closing state);

[0031] Figure 12 It is a schematic diagram of the closing driving part of the electric operating device of the circuit breaker of the present invention;

[0032] Figure 13 It is a schematic diagram of the first linkage part of the electric operating device of the circuit breaker of the present invention;

[0033] Figure 14 It is a schematic diagram of the opening driving part of the electric operating device of the circuit breaker of the present invention;

[0034] Figure 15 is Figure 14 exploded structure schematic diagram;

[0035] Figure 16 It is a schematic diagram of the opening part of the electric operating device of the circuit breaker of the present invention (provided with a second linkage groove);

[0036] Figure 17 It is a schematic diagram of the driving part of the electric operating device of the circuit breaker of the present invention (integral type);

[0037] Figure 18 It is a schematic diagram of the linkage part of the electric operating device of the circuit breaker of the present invention (integral type);

[0038] Figure 19 It is a schematic diagram of the operating part and the buffer part of the electric operating device of the circuit breaker of the present invention;

[0039] Figure 20 It is a schematic diagram of the installation of the driving part of the electric operating device of the circuit breaker of the present invention (integral type);

[0040] Figure 21It is a schematic structural diagram of the control gear of the electric operating device of the circuit breaker of the present invention (on the side close to the second bracket);

[0041] Figure 22 It is a schematic structural diagram of the control gear of the electric operating device of the circuit breaker of the present invention (on the side close to the first bracket). Specific embodiments

[0042] The following combines the attached Figures 1 to 20 Given embodiments to further illustrate the specific embodiments of the electric operating device of the circuit breaker of the present invention. The electric operating device of the circuit breaker of the present invention is not limited to the descriptions of the following embodiments.

[0043] As Figures 1 - 5 Shown, an electric operating device of a circuit breaker, one side wall of its housing 1 serves as an operating surface 11 and is provided with a first chute 101. The first chute 101 is directly opposite to the handle 5 of the circuit breaker. A driving member for driving the handle 5 of the circuit breaker to trip and close is installed in the housing 1. A sliding rod 102 is installed in the housing 1, and the driving member is installed on the sliding rod 102. The driving member can extend out of the housing 1 from the first chute 101 and move along the first chute 101 under the operation of the transmission mechanism in the housing 1 for operating the handle 5 of the circuit breaker to trip or close.

[0044] The driving member includes a closing operation portion 31a and a tripping operation portion 31b. As Figure 3 Shown, in the initial state, there is a space reserved between the closing operation portion 31a and the tripping operation portion 31b of the driving member. The closing operation portion 31a is located below the tripping operation portion 31b, and the handle 5 of the circuit breaker extends into this space. As Figure 4 Shown, when it is necessary to close the circuit breaker, the transmission mechanism drives the closing operation portion 31a to move upward along the first chute 101, pushing the handle 5 of the circuit breaker upward to close; as Figure 5As shown, when it is necessary to trip the circuit breaker, the transmission mechanism drives the tripping operation part 31b to move downward, pushing the handle 5 of the circuit breaker to trip downward. It should be noted that the up-and-down setting is relative. Obviously, it is also possible that the tripping operation part 31b is located below the closing operation part 31a, and the tripping operation part 31b moves upward to push the handle 5 of the circuit breaker to trip. Preferably, in the initial state, that is, when no closing or tripping operation is performed, neither the closing operation part 31a nor the tripping operation part 31b will contact the handle 5 of the circuit breaker, and they can automatically return to the initial state after the closing driving part or the tripping driving part drives the handle of the circuit breaker to move, waiting for the next instruction. The space reserved between the closing driving part and the tripping driving part enables the closing driving part and the tripping driving part not to contact the handle 5 in the initial state, and they can return to the initial state after the closing driving part or the tripping driving part drives the handle 5 to move, avoiding misoperation of the closing driving part or the tripping driving part and causing damage to the circuit breaker. Specifically, when the closing driving part operates the handle 5 of the circuit breaker to close and then returns to the initial state, and the tripping driving part operates the handle 5 of the circuit breaker to trip and then returns to the initial state, this can avoid the closing driving part interfering with the tripping action of the tripping driving part and the tripping driving part interfering with the closing action of the closing driving part. One implementation method is to set a position recognition switch in the transmission mechanism, and after the position recognition switch is triggered, the control circuit controls the transmission mechanism to operate the closing driving part or the tripping driving part to return to the initial position.

[0045] This electric operating device arranged on the front of the handle 5 of the circuit breaker, rather than the traditional arrangement on the side wall of the circuit breaker, can be applied to a cabinet with limited lateral space, and can also avoid tilting during the operation of the handle 5 of the circuit breaker, causing the circuit breaker contacts to be out of sync, or avoid the need to configure an electric operating device for each pole of the circuit breaker separately.

[0046] As an embodiment, the widths of the closing operation part 31a and the tripping operation part 31b can be widened as needed to drive the handles 5 of multiple-pole circuit breakers to act simultaneously.

[0047] Preferably, as an embodiment, as Figure 3 shown, a moving device 6 is further provided on the electric operating device. The side wall opposite to the operating surface 11 is used as the connecting surface 12 to install the moving device 6 for displacement. Its connecting surface 12 is as Figure 2 shown. The electric operating device is installed on a moving track (not shown in the figure) through the moving device 6. 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 different circuit breakers to perform different closing and tripping actions.

[0048] As an embodiment, as Figure 6 、 7As shown in the figure, a bracket is provided inside the housing 1 of the electric operating device of the circuit breaker. The bracket divides the space inside the housing 1 into a driving space and a transmission space. Specifically, the bracket includes a first bracket 103 and a second bracket 104 arranged at intervals. The space between the first bracket 103 and the second bracket 104 serves as the transmission space for installing the transmission device, and the space between the first bracket 103 and the operating surface 11 serves as the driving space for installing the driving member. Preferably, a sliding rod 102 is installed in the driving space. The driving member is slidably installed on the sliding rod 102 and moves along the first chute 101 on the sliding rod 102 under the operation of the transmission mechanism. The first bracket 103 and the second bracket 104 divide the space inside the housing 1 into two relatively independent parts, providing a working area for the transmission mechanism and the driving member, and avoiding performance instability caused by mutual interference of each functional component.

[0049] Preferably, the transmission mechanism includes a motor 201 and a gear set connected to the motor 201. The gear set includes a closing and opening output gear, and the closing and opening output gear is provided with a transmission shaft. A linkage groove cooperating with the transmission shaft is provided on the driving member. The motor 201 drives the gear set to rotate, and through the cooperation between the transmission shaft of the closing and opening output gear and the linkage groove of the driving member, the driving member slides on the sliding rod 102 to operate the handle 5 of the circuit breaker to close or open. The gear set is installed in the transmission space between the first bracket 103 and the second bracket 104.

[0050] Preferably, the transmission ratio of the closing and opening output gear changes periodically, providing a periodically changing driving force and action speed for the driving member. The periodically changing transmission ratio of the closing and opening output gear provides a larger driving force for the driving member in the early stage of closing and a larger closing speed for the driving member in the later stage of closing, thereby reducing the burnout of the contacts or the failure of the circuit breaker. A preferred solution is that the closing and opening output gear is preferably an elliptical gear, so that an appropriate transmission force and lever ratio can be set, enabling the driving member to obtain a periodically changing driving force and action speed during closing and opening, avoiding contact burnout or circuit breaker failure. Using a gear pair composed of such non-circular gears can achieve a periodically changing transmission ratio, with a compact structure, good rigidity, and ensuring relatively stable transmission. Obviously, the closing and opening output gear can also be a circular gear, but it cannot obtain a periodically changing transmission ratio.

[0051] In Figure 10 、 11In the embodiment, the closing and opening output gears include a closing output gear 205 and an opening output gear 206. The transmission shafts on the closing and opening output gears include a closing transmission shaft 205a provided on the closing output gear 205 and an opening transmission shaft 206a provided on the opening output gear 206. The closing transmission shaft 205a is used to operate the closing operation part 31a of the driving member to close the handle 5 of the circuit breaker, and the opening transmission shaft 206a is used to operate the opening operation part 31b of the driving member to open the handle 5 of the circuit breaker. Preferably, the closing output gear 205 and the opening output gear 206 are engaged with each other and can be driven and controlled simultaneously.

[0052] The closing output gear 205 and the opening output gear 206 are preferably elliptical gears made of metal materials. The pitch curve of the elliptical gear is an ellipse or a higher-order ellipse. Since the central angle corresponding to each tooth of the elliptical gear is not always equal, the closing output gear 205 and the opening output gear 206 rotate non-uniformly during the meshing rotation process, and this non-uniform rotation shows a periodic speed change. According to this characteristic, a suitable transmission force and lever ratio are designed so that the closing operation part 31a can obtain a larger closing driving force in the early stage of closing and a faster closing speed in the later stage of closing. In the early stage of closing, that is, from the start of closing to almost closing, the long side of the ellipse of the opening output gear 206 contacts and cooperates with the short side of the ellipse of the closing output gear 205, so that the closing operation part 31a obtains a larger closing driving force; in the later stage of closing, that is, from almost closing to completely closing, the short side of the ellipse of the opening output gear 206 contacts and cooperates with the long side of the ellipse of the closing output gear 205, so that the closing operation part 31a obtains a faster closing speed; during the rotation process, the center distance is fixed to ensure that the closing output gear 205 and the opening output gear 206 always maintain good meshing. At the same time, the transmission force and the lever cooperate with the action process of the circuit breaker to make the closing instant action fast, that is, to increase the closing force in the early stage of closing at the moment when the moving contact contacts the static contact. The closing output gear 205 and the opening output gear 206 using a gear pair composed of such non-circular gears can achieve a periodically changing transmission ratio, with a compact structure, good rigidity and ensuring relatively stable transmission; the elliptical gears made of metal materials are beneficial to extending 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.

[0053] Specifically, the gear set further includes a first-stage gear 202, a second-stage gear 203 and a third-stage gear 204; the motor 201 is engaged with the first-stage gear 202 through a worm, the first-stage gear 202 is engaged with the second-stage gear 203, the second-stage gear 203 is engaged with the third-stage gear 204, and the third-stage gear 204 is provided with a closing and opening output gear; as Figure 8 、 10As shown in FIGS. 10 and 11, the three-stage gear 204 is provided with a closing output gear 205 and a tripping output gear 206. The closing output gear 205 and the tripping output gear 206 mesh with each other. 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, that is, the rotating shaft of the closing output gear 205 is not arranged at the center of the closing output gear 205. The tripping output gear 206 meshes with the closing output gear 205, and the rotating shaft of the tripping output gear 206 is eccentrically arranged, that is, the rotating shaft of the tripping output gear 206 is not arranged at the center of the tripping output gear 206. A closing transmission shaft 205a is provided on the closing output gear 205, and a tripping transmission shaft 206a is provided on the tripping output gear 206. The eccentric arrangement keeps a certain distance between the rotation centers of the two elliptical gears. Of course, the three-stage gear 204 and the tripping output gear 206 can also be driven by the same rotating shaft, and the closing output gear 205 is driven to rotate by the tripping output gear 206.

[0054] As Figure 21 , 22 shown, the transmission mechanism further includes a control gear 207 and a plurality of position identification switches. A protruding trigger platform 207a is provided on the control gear 207. The plurality of position identification switches are fixedly installed in the housing 1 and are spaced on the circumference coaxial with the control gear 207. The preferred position is on the side close to the second bracket 104 (for the second bracket 104, see Figure 6 , 7 ). The plurality of position identification switches are respectively used to cooperate with the trigger platform 207a to provide position signals to control the forward rotation, reverse rotation and stop rotation of the motor. The plurality of position identification switches include an initial position identification switch 208a, a closing position identification switch 208b and a tripping position identification switch 208c. The control gear 207 is installed on the same rotating shaft as the tripping output gear 206, and the rotation of the tripping output gear 206 drives the control gear 207 to rotate. The motor 201 drives the closing output gear 205, the tripping output gear 206 and the control gear 207 to rotate in sequence.

[0055] Closing process: When the motor 201 drives the closing output gear 205 to rotate in the closing direction under the transmission of the first-stage gear 202, the second-stage gear 203 and the three-stage gear 204, taking the counterclockwise rotation of the closing output gear as an example (see Figure 22 for the direction), at this time, the tripping output gear 206, the control gear 207 and the trigger platform 207a all rotate clockwise (see Figure 21In the counterclockwise rotation direction), the trigger platform 207a rotates from the initial position recognition switch 208a towards the closing position recognition switch 208b. The closing output gear 205 causes the closing operation part 31a of the closing driving member to operate the handle 5 of the circuit breaker through the closing transmission shaft 205a. When the trigger platform 207a triggers the closing position recognition switch 208b, the control motor 201 rotates in the reverse direction towards the opening direction. When the trigger platform 207a triggers the initial position recognition switch 208a, the closing operation part 31a is controlled to return to the initial position, and the motor 201 stops rotating.

[0056] Opening process: When the motor 201 drives the closing output gear 205 to rotate in the opening direction under the transmission of the first-stage gear 202, the second-stage gear 203, and the third-stage gear 204, taking the clockwise rotation of the closing output gear 205 as an example (see Figure 22 for the direction), at this time, the opening output gear 206, the control gear 207, and the trigger platform 207a all rotate counterclockwise (see Figure 21 for the direction of clockwise rotation), the trigger platform 207a rotates from the initial position recognition switch 208a towards the opening position recognition switch 208c, the opening output gear 206 rotates in the opening direction and causes the opening operation part 31b of the opening driving member to operate the handle 5 of the circuit breaker to open. When the trigger platform 207a triggers the opening position recognition switch 208c, the control motor 201 rotates in the reverse direction towards the closing direction. When the trigger platform 207a triggers the initial position recognition switch 208a, the opening operation part 31b is controlled to return to the initial position.

[0057] The present invention provides in-place signals for closing, opening, and the initial position through multiple position recognition switches, controls the forward and reverse rotation of the motor. The position recognition switches and the control motor 201 can be respectively connected to the control circuit. The control circuit can be implemented through a circuit or through a single-chip microcomputer. The control circuit can be arranged inside the housing 1 or outside the object 1, and is controlled remotely.

[0058] As an implementation, a transmission shaft is provided on the transmission mechanism. The driving member includes a closing driving member and an opening driving member. The closing driving member and the opening driving member are respectively provided with a closing operation part 31a and an opening operation part 31b. The closing driving member and the opening driving member are respectively provided with linkage grooves, and the linkage grooves of the two are provided with openings in opposite directions for periodically cooperating with and separating from the transmission shaft of the transmission mechanism. Preferably, the driving member includes a linkage member connected to the transmission mechanism, and a linkage groove is provided on the linkage member for connecting to the transmission shaft.

[0059] The linkage groove of the driving member can convert the circular motion of the closing and opening output gears into linear motion. With the cooperation of the linkage groove and the transmission shaft, the driving member moves linearly within the first sliding groove 101. The closing operation part 31a and the opening operation part 31b of the driving member respectively operate the handle 5 of the circuit breaker to close and open. The linear motion of the driving member preferably proceeds along the sliding rod 102. Specifically, as Figure 8 shown, the linkage groove of the closing driving member is the first linkage groove 30a, and the linkage groove of the opening driving member is the second linkage groove 30c. When the transmission shaft cooperates with the first linkage groove 30a on the closing driving member, the transmission shaft is separated from the second linkage groove 30c on the opening driving member to prevent the opening driving member from malfunctioning; when the transmission shaft cooperates with the second linkage groove 30c on the opening driving member, the transmission shaft is separated from the first linkage groove 30a on the closing driving member to prevent the closing driving member from malfunctioning.

[0060] Specifically, as Figure 8 , 13 , and Figure 15 shown, the transmission shaft includes a closing transmission shaft 205a and an opening transmission shaft 206a. Both the first linkage groove 30a and the second linkage groove 30c 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. 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 to achieve separation from the first linkage member, preventing the closing operation part 31a from malfunctioning during opening; similarly, the closed end of the second linkage groove 30c cooperates with the opening transmission shaft 206a to drive the second linkage member to move. The open end of the second linkage member is used to enable the opening transmission shaft 206a to rotate out after opening is completed to achieve separation from the second linkage member, preventing the opening operation part 31b from malfunctioning during closing.

[0061] Specifically, as Figure 7 , 8As shown, 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 installed on the sliding rod 102. The operating member is linked with the linkage member. A linkage groove is provided on the linkage member for connecting with the transmission shaft. A closing operation portion 31a and a tripping operation portion 31b are provided on the operating member. Specifically, the linkage member includes a first linkage member and a second linkage member. The first linkage member is provided with a first linkage groove 30a that periodically cooperates with the closing transmission shaft 205a. The second linkage member is provided with a second linkage groove 30c that periodically cooperates with the tripping transmission shaft 206a. The operating member includes a closing member provided with the closing operation portion 31a and a tripping member provided with the tripping operation portion 31b. Preferably, an elastic buffer member 4 is provided between the linkage member and the operating member. The elastic buffer member 4 is used to absorb the closing and tripping margins, prevent the closing operation portion 31a and the tripping operation portion 31b from making a hard impact on the handle 5, and prevent the handle 5 from not being accurately pushed in place or even being broken. Of course, the elastic buffer member 4 may not be provided at all, or may be provided only on the closing driving member, and can be omitted on the tripping driving member.

[0062] Specifically as Figure 12 、 14 As shown, the driving member includes a closing driving member provided with the closing operation portion 31a and a tripping driving member provided with the tripping operation portion 31b. The closing member and the tripping member are operating members driven by the linkage member. Specifically, the closing driving member includes a first linkage member and a closing member. The first linkage member is installed on the sliding rod 102. The closing member is installed 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 that cooperates with the closing transmission shaft 205a. A closing operation portion 31a for operating the handle 5 of the circuit breaker is provided on the closing member. Preferably, an elastic buffer member 4 is provided between the first linkage member and the closing member. The tripping driving member includes a second linkage member and a tripping member. The second linkage member is installed on the sliding rod 102. The tripping member is installed on the sliding rod 102 and is linked with the second linkage member. The second linkage member is provided with a second linkage groove 30c that cooperates with the tripping transmission shaft 206a. A tripping operation portion 31b for operating the handle 5 of the circuit breaker is provided on the tripping member. Preferably, an elastic buffer member 4 is provided between the second linkage member and the tripping member.

[0063] The closing driving member and the tripping driving member are independently provided. The closing driving member and the tripping driving member are respectively driven by the transmission mechanism to operate the handle 5 of the circuit breaker to close and trip. As Figure 6As shown in the figure, a compression spring 7 is provided between the closing driving member and the opening driving member. The compression spring 7 is used to assist in the reset of the closing driving member and the opening driving member, and at the same time can also reduce the influence of the gap when the closing driving member and the opening driving member cooperate. The linear motion performed by the closing driving member during the closing process deforms and stores energy in the compression spring 7. When the closing is completed, the elastic force of the compression spring 7 provides an auxiliary driving force for the closing driving member to return to the initial position. Similarly, the linear motion performed by the opening driving member during the opening process deforms and stores energy in the compression spring 7, and the elastic force of the compression spring 7 provides an auxiliary driving force for the opening driving member to return to the initial position. Preferably, a compression spring 7 is sleeved on the sliding rod 102 between the closing driving member and the opening driving member, which can not only serve as the compression spring 7 but also provide a driving force for the reset of the first linkage member and the second linkage member to ensure the reset speed.

[0064] As Figure 13 As shown in the figure, 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 open end facing the first sliding groove 101. Through holes for the sliding rod 102 to pass through are provided on the opposite first linkage wall 301 and second linkage wall 302. A connecting groove 30b for connecting the closing member is provided on the first linkage wall 301. A first linkage groove 30a is provided on the third linkage wall 303. The inner diameter of the first linkage groove 30a is substantially equal. The first linkage groove 30a has a closed end and an open end. The first linkage groove 30a includes a connected first straight section and a first arc section. The first straight section is perpendicular to the sliding rod 102, and the first arc section is in the shape of a quarter circle. 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, and its opening is provided at the connection between the second linkage wall 302 and the third linkage wall 303. 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 turns into the first linkage groove 30a from the open end of the first linkage groove 30a and rotates along the first linkage groove 30a.

[0065] As Figure 12As shown, the closing member is preferably smaller than the first linkage member and is disposed inside the first linkage member. The closing member is formed by sequentially connecting a first side wall 311, a first connecting wall 315, and a second side wall 312 to form a U-shaped structure. Through holes for passing through the sliding rod 102 are provided 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 so that the second side wall 312 of the closing member is located inside the first linkage member. An elastic buffer member 4 is sleeved on the sliding rod 102 between the second side wall 312 and the first linkage member. A closing operation portion 31a for operating the closing of the circuit breaker handle 5 is provided on the first side wall 311 or the second side wall 312. The closing operation portion 31a extends out of the first chute 101 and is preferably formed by extending from the middle edge of the first side wall 311 towards the first chute 101. The end portion of the closing operation portion 31a is bent downwards.

[0066] As Figure 15 As shown, 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 provided on the opposite fourth linkage wall 304 and fifth linkage wall 305. An arc-shaped second linkage groove 30c is provided on the sixth linkage wall 306. The opening and closing transmission shaft 206a extends into the second linkage groove 30c to drive the second linkage member to move. The second linkage groove 30c sequentially includes a connected second straight section and a second arc section. The second straight section is parallel to the sliding rod 102. The second arc section is approximately semi-circular arc-shaped. 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, and the other side is a straight side wall. The open end is located at the end of the second straight section. The opening of the open end is provided at the connection between the fourth linkage wall 304 and the sixth linkage wall 306. When the opening and closing transmission shaft 206a moves from the open end and moves along the arc side wall to the closed end to drive the second linkage member to move, and then turns out along the straight side wall and separates from the second linkage member, preventing misoperation during closing.

[0067] The opening member is disposed within 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. Opposite third side wall 313 and fourth side wall 314 are provided with through holes for the sliding rod 102 to pass through. The third side wall 313 or the fourth side wall 314 is provided with an opening operation portion 31b for operating the handle 5 of the circuit breaker to open. Preferably, the opening operation portion 31b is integrally formed with the third side wall 313. The opening operation portion 31b is integrally in the shape of a U with an upward opening. The U-shaped body has a long side wall for connecting with the third side wall 313 and a short side wall for contacting the handle 5 of the circuit breaker. The opening member is located between the fourth linkage wall 304 and the fifth linkage wall 305. An elastic buffer member 4 is sleeved on the sliding rod 102 between the fourth side wall 314 and the fourth linkage wall 304. The elastic buffer member 4 is preferably a spring.

[0068] Specifically, as an example Figure 6 , 16 shown, the second linkage groove 30c can be provided on the second connecting wall 315 of the opening member. Without providing a linkage member, the opening transmission shaft 206a drives the opening member to perform a linear motion within the first sliding groove 101 through the second linkage groove 30c. At this time, the opening of the open end of the second linkage groove 30c is provided at the connection between the third side wall 313 and the second connecting wall 316. Thus, the second linkage member and the elastic buffer member 4 provided between the second linkage member and the opening member can be omitted. Figure 6 The opening member in

[0069] is the opening member with the second linkage member and the elastic buffer member 4 omitted. Figure 8 It should be noted that since the closing output gear 205 and the opening output gear 206 mesh with each other and their rotation directions are opposite, the opening directions of the open ends of the first linkage groove 30a and the second linkage groove 30c are misaligned relative to each other, and their closed ends are relatively misaligned. 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 their rotation directions are opposite. As

[0070] shown in Figures 17 - 20In the illustrated embodiment, a linkage member and an operating member are adopted, and the closing operation portion 31a and the opening operation portion 31b are of an integral structure. The driving member includes a linkage member and an operating member. The linkage member cooperates with the transmission mechanism. The linkage member is installed on the sliding rod 102, and the operating member is installed on the sliding rod 102 and is linked with the linkage member. An elastic buffer member 4 is provided between the linkage member and the operating member. A linkage groove 3a is provided on the linkage member. The operating member includes a closing operation portion 31a and an opening operation portion 31b connected together. The closing and opening output gear of the transmission mechanism is provided with a transmission shaft, and the transmission shaft cooperates with the linkage groove 3a to drive the driving member to move linearly along the sliding rod 102. The closing operation portion of the operating member is used to operate the handle 5 of the circuit breaker to close, and the opening operation portion is used to operate the handle 5 of the circuit breaker to open.

[0071] In this embodiment, the transmission mechanism only needs to be provided with one closing and opening output gear, without separately providing a closing output gear 205 and an opening output gear 206. A closing and opening transmission shaft is provided on the closing and opening output gear. The closing and opening output gear can adopt a circular gear. The closing and opening 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 portion 31a, and the handle 5 of the circuit breaker is opened by operating the opening operation portion 31b.

[0072] As Figure 17 、 18 As shown, the linkage member is formed by connecting two horizontal linkage walls 31 and a vertical linkage wall 32 to form a U-shaped structure with an open end facing the first chute 101. The two horizontal 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. The linkage groove 3a cooperates with the transmission mechanism to drive the driving member to move along the sliding rod 102 by the linkage member to operate the handle 5 of the circuit breaker to open or close. Preferably, the linkage groove 3a provided on the vertical linkage wall 32 is a bar-shaped linkage groove 3a with both ends closed. The central axis of the linkage groove 3a is perpendicular to the sliding rod 102, and the closing and opening transmission shaft extends into the linkage groove 3a to drive the linkage member to move linearly along the sliding rod.

[0073] As Figure 19As shown in an embodiment, the operating member is disposed inside the linkage member and extends out of the first sliding groove 101 to operate the handle 5 of the circuit breaker. The operating member includes a closing side wall and a tripping side wall. The closing side wall and the tripping side wall are connected to form a U-shaped structure with an opening facing the first sliding groove 101. Through holes for the sliding rod 102 to pass through are provided on the closing side wall and the tripping side wall. An elastic buffer member 4 is sleeved on the sliding rod 102 between the closing side wall and a transverse linkage wall 31. The edge of the closing side wall serves as the closing operating portion 31a. An elastic buffer member 4 is sleeved on the sliding rod 102 between the tripping side wall and the other transverse linkage wall 31. The edge of the tripping side wall serves as the tripping operating portion 31b. To save space and increase the distance between the closing operating portion 31a and the tripping operating portion 31b, the closing side wall and the tripping side wall are preferably in a stepped shape. In this way, the closing side wall and the tripping side wall are connected to form a symmetric U-shaped structure with an increasingly larger opening. The through holes for the sliding rod 102 to pass through on the closing side wall and the tripping side wall are provided on the side close to the linkage member.

[0074] The driving member in the present invention can be either a separately provided split-type closing driving member and tripping driving member or an integrated driving member, so that the type of driving member can be designed according to the needs of the handle of the circuit breaker, making the electric operating device of the circuit breaker of the present invention have wide applicability.

[0075] To optimize the distinction of the space inside the housing 1, preferably, a first bracket 103 and a second bracket 104 that divide the space inside the housing 1 into a driving space and a transmission space are provided. Preferably, as Figure 6 、 7 shown, the lower end and the upper end of the first bracket 103 are respectively provided with a first clamping portion 103a and a second clamping portion 103b. The first clamping portion 103a and the second clamping portion 103b are respectively bent from the lower end and the upper end of the first bracket 103 towards the operating surface 11. The area between the first clamping portion 103a and the second clamping portion 103b serves as the installation area for installing the sliding rod 102.

[0076] The second bracket 104 is provided with connecting ear plates 104a for installing the moving device 6 as Figure 9 shown. The number of the connecting ear plates 104a is two as Figure 2 shown. The two connecting ear plates 104a are oppositely arranged on the side of the second bracket 104 close to the connecting surface 12. A through hole for the connecting ear plate 104a to pass through is provided on the connecting surface 12. The moving device 6 is fixedly installed between the two connecting ear plates 104a after passing through the housing 1. Of course, the number of the connecting ear plates 104a is not limited to two; a limiting plate 104b is provided at one end of the second bracket 104, and the limiting plate 104b is used to limit the transmission mechanism.

[0077] The transmission mechanism includes a motor 201 and a gear set connected to the motor 201. The gear set is installed in the transmission space between the first bracket 103 and the second bracket 104. The second bracket 104 is longer than the first bracket 103. The motor 201 is installed between the second bracket 104 and the first bracket 103 and below the first clamping portion 103a of the first bracket 103. The middle parts of the upper and lower ends of the second bracket 104 are bent towards the connection surface 12 to form connecting ear plates 104a. The side wall beside one connecting ear plate 104a extends towards the middle and is bent towards the operation surface 11 to form a bent limiting plate 104b. An arc-shaped groove for cooperating with the motor 201 in the transmission mechanism is provided in the middle of the bent limiting plate 104b. The arc-shaped groove is specifically used for passing through the rotating shaft of the motor 201. Preferably, the arc-shaped groove is arranged on the lower side of the limiting plate 104b to facilitate the stable installation of the motor 201. A plurality of mounting holes for installing the gear set are provided on the plate surface of the second bracket 104. The connecting ear plate 104a passing through the housing 1 and the limiting plate 104b for fixing the motor 201 are provided on the second bracket 104, so that the second bracket 104 is stably fixed in the housing 1 of the circuit breaker, which is beneficial to providing a stable operating environment for the transmission mechanism.

[0078] Further, the first bracket 103 and the second bracket 104 are preferably made of metal materials, which is beneficial to increasing the service strength and prolonging the service life.

[0079] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. An electric operating device for a circuit breaker, comprising a housing (1), characterized in that: A driving member and a transmission mechanism are installed inside the housing (1); a side wall of the housing (1) serves as an operation surface (11) and is provided with a first sliding groove (101) communicating with the inside of the housing (1). The driving member passes through the first sliding groove (101) and extends outside the housing (1), and under the drive of the transmission mechanism, operates the handle (5) of the circuit breaker to close or open. The transmission mechanism includes a motor (201) and a gear set connected to the motor (201). The gear set includes a closing and opening output gear, and the closing and opening output gear is an elliptical gear.

2. The electric operating device of the circuit breaker according to claim 1, characterized in that: The closing and opening output gear includes a closing output gear (205) and an opening output gear (206), and both the closing output gear (205) and the opening output gear (206) are elliptical gears.

3. The electric operating device of the circuit breaker according to claim 2, wherein: 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), a sliding rod (102) is installed inside the housing (1), and the driving member includes a closing driving member and an opening driving member, and the closing driving member and the opening driving member are installed on the sliding rod (102); The closing driving member and the opening driving member are respectively provided with a closing operation portion (31a) and an opening operation portion (31b). The closing operation portion (31a) and the opening operation portion (31b) pass through the first sliding groove (101) and extend outside the housing (1). The closing driving member is provided with a first linkage groove (30a) cooperating with the closing transmission shaft (205a), and the opening driving member is provided with a second linkage groove (30c) cooperating with the opening transmission shaft (206a); The closing output gear (205) drives the closing driving member to move along the sliding rod (102) through the cooperation of the closing transmission shaft (205a) and the first linkage groove (30a), so that the closing operation portion (31a) operates the handle (5) of the circuit breaker to close. The opening driving member drives the opening driving member to move along the sliding rod (102) through the cooperation of the opening transmission shaft (206a) and the second linkage groove (30c), and operates the opening operation portion (31b) to operate the handle (5) of the circuit breaker to open.

4. The electric operating device of the circuit breaker according to claim 2, characterized in that: The closing output gear (205) and the opening output gear (206) mesh with each other. In the early stage of closing, the long side of the ellipse of the opening output gear (206) contacts and cooperates with the short side of the ellipse of the closing output gear (205), so that the closing operation portion (31a) obtains a larger closing driving force; in the later stage of closing, the short side of the ellipse of the opening output gear (206) contacts and cooperates with the long side of the ellipse of the closing output gear (205), so that the closing operation portion (31a) obtains a faster closing speed.

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

6. The electric operating device of a circuit breaker according to claim 2, characterized in that: The gear set further includes a third-stage gear (204); 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, the opening output gear (206) meshes with the closing output gear (205), and the rotating shaft of the opening output gear (206) is eccentrically arranged; a closing transmission shaft (205a) for connecting with a closing driving member is provided on the closing output gear (205), and an opening transmission shaft (206a) for connecting with an opening driving member is provided on the opening output gear (206).

7. The electric operating device of the circuit breaker according to claim 6, characterized in that: The gear set further includes a control gear (207), the control gear (207) is installed on the same rotating shaft as the opening output gear (206), a protruding trigger platform (207a) is provided on the control gear (207), and a plurality of position recognition switches are arranged at intervals on the circumference coaxial with the control gear (207) for cooperating with the trigger platform (207a) to provide position signals.

8. The electric operating device of a circuit breaker according to claim 3, characterized in that: Both the first linkage groove (30a) and the second linkage groove (30c) include an open end and a closed 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 realize separation from the first linkage member; the closed end of the second linkage groove (30c) cooperates 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 to enable the opening transmission shaft (206a) to rotate out after opening is completed so as to realize separation from the second linkage member.

9. The electric operating device of the circuit breaker according to claim 8, characterized in that: The open ends of the open end of the first linkage groove (30a) and the open end of the second linkage groove (30c) are misaligned relative to each other, 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) mesh with each other.

10. The electric operating device of the circuit breaker according to claim 9, characterized in that: The first linkage groove (30a) includes a connected first straight section and a first arc section, the first straight section is perpendicular to the sliding rod (102), the closed end is located at the end of the first straight section, and the open end is located at the end of the first arc section; The second linkage groove (30c) sequentially includes a connected second straight section and a second arc section, the second straight section is parallel to the sliding rod (102), the second arc section is approximately semicircular, 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, and the open end is located at the end of the second straight section.

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