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CN-224232582-U - Corner control structure of electric operating mechanism

CN224232582UCN 224232582 UCN224232582 UCN 224232582UCN-224232582-U

Abstract

The application discloses a corner control structure of an electric operating mechanism, and relates to the technical field of electrical equipment. The electric brake device is technically characterized by comprising a brake blade mechanism and a driving mechanism, wherein a driving rotating shaft in the brake blade mechanism is provided with a middle stroke control mechanism, the middle stroke control mechanisms comprise a first middle position stroke control module which is connected with the driving mechanism through an electric signal, and a second middle position stroke control module which is connected with an auxiliary brake unit, the first middle position stroke control module can control the on-off of an electric loop of the driving mechanism, and the second middle position stroke control module can control the on-off of the electric loop in the auxiliary brake unit. The application not only can realize the accurate control and locking of the output rotation angle when the operating mechanism is switched to the middle position, but also can effectively improve the safety accuracy and reliability of the whole mechanism in the control process of the output rotation angle due to the addition of the auxiliary braking unit and related mechanisms.

Inventors

  • Suo Ningqiang
  • AI XIAOYU
  • DONG HUI
  • LI YI
  • ZHANG JIANG
  • Lei Minqiang

Assignees

  • 德华瑞尔(西安)电气有限公司

Dates

Publication Date
20260512
Application Date
20250428

Claims (8)

  1. 1. The electric operating mechanism corner control structure comprises a knife mechanism (2) and a driving mechanism (3) which are arranged on a bending underframe (1), and is characterized in that two groups of middle stroke control mechanisms (4) are arranged on a driving rotating shaft (21) in the knife mechanism (2) side by side along the axis direction of the driving rotating shaft, wherein one group of middle stroke control mechanisms (4) are used for limiting the position of the driving rotating shaft (21) in the knife mechanism (2) when the driving rotating shaft (21) rotates to the middle position in the clockwise direction, and the other group of middle stroke control mechanisms (4) are used for limiting the position of the driving rotating shaft (21) in the knife mechanism (2) when the driving rotating shaft (21) rotates to the middle position in the anticlockwise direction; Each group of intermediate travel control mechanisms (4) comprises a first intermediate travel control module (41) and a second intermediate travel control module (42); The first intermediate position travel control module (41) is in electrical signal connection with the driving mechanism (3), and the first intermediate position travel control module (41) can control the on-off of an electric loop of the driving mechanism (3); An auxiliary braking unit (5) is arranged on the outer side of a base (32) at one end of an output shaft (31) in the driving mechanism (3), and the auxiliary braking unit (5) can be used for braking the output shaft (31) in the driving mechanism (3) after being electrified; The second intermediate position travel control module (42) is in electrical signal connection with the auxiliary braking unit (5), and the second intermediate position travel control module (42) can control the on-off of an electric loop in the auxiliary braking unit (5).
  2. 2. The electric operating mechanism corner control structure according to claim 1, wherein the first middle position travel control module (41) comprises a first cam (411) and a first travel switch (412) mounted on the bending underframe (1), the first cam (411) is fixedly sleeved on a driving rotating shaft (21) in the knife mechanism (2), and the position of the first cam (411) on the driving rotating shaft (21) in the knife mechanism (2) meets the condition that when the driving rotating shaft (21) rotates to a middle position, a convex top on the first cam (411) just triggers a roller on the first travel switch (412), and a micro switch in the first travel switch (412) is electrically connected with a driving motor (33) in the driving mechanism (3) through an electric circuit; The projections of the first cams (411) in the two groups of intermediate travel control mechanisms (4) on a vertical plane are centrosymmetric with respect to a driving rotating shaft (21) in the knife mechanism (2).
  3. 3. The structure according to claim 2, wherein the second middle travel control module (42) comprises a second cam (421) and a second travel switch (422) mounted on the bending chassis (1), the second cam (421) is fixedly sleeved on a driving rotating shaft (21) in the knife mechanism (2), and an included angle is formed between the protruding top of the second cam (421) and the protruding top of the first cam (411), and the included angle can enable the contact time of the second cam (421) and the second travel switch (422) to lag the contact time of the first cam (411) and the first travel switch (412); The projections of the second cams (421) in the two groups of intermediate travel control mechanisms (4) on a vertical plane are also centrosymmetric with respect to a drive rotation shaft (21) in the knife mechanism (2).
  4. 4. The electric operating mechanism corner control structure according to claim 1, wherein the auxiliary braking unit (5) comprises a magnet coil (51) and a braking piece (52), the magnet coil (51) is fixedly connected with the outer side of a base (32) in the driving mechanism (3), a through hole is formed in the center of the magnet coil (51), a spring (53) is arranged in the through hole of the magnet coil (51), one end of the spring (53) is fixedly connected with a bottom frame of the driving mechanism (3), an output shaft (31) of the driving mechanism (3) is inserted into a door-shaped bracket (54) from the center of the spring (53) and movably connected with the door-shaped bracket, two ends of the opening side of the door-shaped bracket (54) are fixedly installed on the bottom frame of the driving mechanism (3), the braking piece (52) is arranged on one side, close to the closed end of the door-shaped bracket (54), of the magnet coil (51) is provided with a space, one end, far away from the driving mechanism (3), of the spring (53) is fixedly connected with the bottom frame (52), and the braking piece is connected with the output shaft (31) of the driving mechanism (52).
  5. 5. The electric operating mechanism corner control structure according to claim 4, wherein the auxiliary brake unit (5) further comprises a mounting plate (55), the mounting plate (55) is fixedly mounted on the output shaft (31) of the driving mechanism (3), a plurality of positioning rods (56) are fixedly mounted on the periphery of the mounting plate (55), and the positioning rods (56) are in contact with one side, away from the base (32) of the driving mechanism (3), of the brake plate (52).
  6. 6. The structure for controlling the rotation angle of an electric operating mechanism according to any one of claims 1 to 5, wherein the driving motor (33) in the driving mechanism (3) is a permanent magnet motor with a short-circuit braking function.
  7. 7. The electric operating mechanism corner control structure according to claim 6, characterized in that a power shaft of a driving motor (33) in the driving mechanism (3) is connected with an output shaft (31) of the driving mechanism (3) through a torsion limiting device (6).
  8. 8. The electric operating mechanism corner control structure according to claim 7, characterized in that a timing protection relay is arranged in the power circuit of the driving motor (33) in the driving mechanism (3) and the power circuit of the magnet coil (51) in the auxiliary brake unit (5).

Description

Corner control structure of electric operating mechanism Technical Field The application relates to the technical field of electrical equipment, in particular to a corner control structure of an electric operating mechanism. Background The isolating switch is used as important electrical equipment in a high-voltage power supply loop, and has the main functions of meeting the set current capacity of a circuit in a closing state, reliably disconnecting the primary circuit in a separating state and forming an obvious visible fracture. The action of the disconnecting switch usually needs an operating mechanism as a power source to drive the disconnecting switch to open and close, and forms different on-off loops in a primary loop to realize the functional requirements of the circuit. Under the increasingly automatic and intelligent functional requirements of high-voltage power supply circuit equipment, higher functional requirements are provided for a switch which is conventionally used in a high-voltage circuit and has conventional two stations (switching-off and switching-on) in the circuit. In this case, a single switch often needs more stations, such as a three-station (closing, isolating, grounding) switch applied to an urban rail transit line, and a switching switch used in a power transmission and distribution network needs a #1 on-position, a #2 on-position, a grounding position, and the like. The conventional scheme is a single-blade multi-station switch for the switch with multi-station requirements, and the scheme can realize the action control of the multi-station switch by only one set of driving mechanism when in use. The scheme has more cost performance in the aspects of equipment volume, material cost investment and linkage control function. The electric switch knife switch is used as a charged body, the position requirement is higher during the actual operation opening and closing action, when the driving shaft for driving the knife switch is positioned at two sides of the multi-position switch, the position control mode can be the same as the mode of controlling the position of the driving shaft of the traditional two-position switch, namely, by setting a travel switch and a mechanical limit mode, after the switch is in place, when the travel switch cuts off the switch action electric loop, the mechanical limit is set to prevent the switch knife switch from further running towards the action trend direction. However, when the driving shaft of the single-knife multi-station switch rotates to the middle position, the knife switch is required to have the functions of moving to the left and right sides, and the conventional mechanical limit for limiting the unidirectional movement is difficult to apply. The drive shaft locking means arranged at the middle position of the existing single-blade multi-station switch is only provided with a travel switch, so that the single-blade multi-station switch has the following problems that due to the fact that the mechanism rotates to be electrically driven mechanical movement, inertia exists inevitably after the mechanical movement is started, even if the travel switch performs power-off operation on a drive motor, the isolating switch can shift under the action of the inertia, in addition, once the travel switch fails or the performance is unstable, due to the fact that other auxiliary braking measures are lacked, the operation of the switch cannot be stopped after the switch reaches the expected position, more serious position shifting or offside phenomena are likely to be caused, and the phenomena can cause abnormal on-off of a high-voltage loop, and serious accidents are likely to be caused. Disclosure of utility model The application provides an electric operating mechanism corner control structure which can effectively solve some problems existing in the prior operating mechanism when stations are switched. The above object of the present application is achieved by the following technical solutions: The electric operating mechanism corner control structure comprises a knife mechanism and a driving mechanism which are arranged on a bending chassis, wherein two groups of middle stroke control mechanisms are arranged on a driving rotating shaft in the knife mechanism side by side along the axis direction of the driving rotating shaft, one group of middle stroke control mechanisms are used for limiting the position of the driving rotating shaft in the knife mechanism when the driving rotating shaft in the knife mechanism rotates to a middle position in the clockwise direction, and the other group of middle stroke control mechanisms are used for limiting the position of the driving rotating shaft in the knife mechanism when the driving rotating shaft in the knife mechanism rotates to the middle position in the anticlockwise direction; each group of intermediate travel control mechanisms comprises a first intermediate travel control module and a second inter