CN212303522U

CN212303522U - Electric operating device of isolating switch

Info

Publication number: CN212303522U
Application number: CN202022718182.XU
Authority: CN
Inventors: 张宗鹏; 王琰; 张昊然; 郭海峰
Original assignee: Beijing Up Energy Electric Co ltd
Current assignee: Beijing Up Energy Electric Co ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-01-05
Anticipated expiration: 2030-11-23

Abstract

The utility model discloses a isolator's electrically-operated device, isolator's electrically-operated device includes motor (1), drive mechanism (2) and output shaft (3), motor (1) can drive output shaft (3) rotation through drive mechanism (2), drive mechanism (2) contain worm wheel (21) and first friction disk (22), the axis of worm wheel (21) and the axis coincidence of output shaft (3), first friction disk (22) are fixed for output shaft (3), worm wheel (21) and first friction disk (22) can use the axis of output shaft (3) as the rotation of axle in step, perhaps worm wheel (21) can use the axis of output shaft (3) as the rotation of axle for first friction disk (22). The transmission mechanism of the electric operating device of the isolating switch adopts static friction connection, so that internal stress generated when a system is overloaded can be released, and transmission structural parts and a motor are protected from being damaged due to overload.

Description

Electric operating device of isolating switch

Technical Field

The utility model relates to an isolator technical field, specific is an isolator's electrically-operated device.

Background

An electric operating mechanism of a contact net isolating switch is a mechanical mechanism for controlling the opening and closing actions of the isolating switch in a modern railway; generally, the electric operating mechanism is divided into a manual operating mechanism and an electric operating mechanism, wherein the electric operating mechanism mainly comprises a box body, a motor, a speed reducer (or a reduction gearbox), an auxiliary contact and the like; the equipment is controlled by a remote operation system, can realize the remote control operation of the opening and closing actions of the disconnecting switch arranged in the high altitude, and achieves the purpose of switching the circuit for isolation or communication. Due to high working reliability, the electric operating mechanism is widely used for controlling the isolating switch in places such as a substation, a power plant and the like besides the railway contact network which applies the equipment in a large amount.

The reduction gearbox selects a fixed finished product assembly, the reduction ratio completely depends on the fixed reduction ratio of the reduction gearbox, the middle process of the reduction gearbox is connected by a fixed gear, all connections in the transmission process are fixed hard connection modes, the connection modes adopted from the output shaft of the motor to the output shaft of the operating mechanism are all flange-fixed or shaft coupling-fixed connection structures, and the structure is very simple and easy to realize.

Because the existing operating mechanism adopts a fixedly formed reduction gearbox component, the output shaft of the motor and the output shaft of the operating mechanism are connected together through a closed gear box, the output shaft of the motor and the gear box are fixedly and hard connected, and the output shaft of the operating mechanism and the gear box are also fixedly and hard connected; the output shaft of the operating mechanism cannot be provided with hard limit, and the action stroke of the isolating switch is fixed, so that the output of the operating mechanism is difficult to debug to be completely consistent with the action stroke of the isolating switch; when the output of the operating mechanism can not reach the action stroke of the isolating switch, the condition that the isolating switch does not act in place can be caused; conversely, in order to avoid that the operation mechanism does not act in place, when the output of the operation mechanism needs to be slightly larger than the action stroke of the isolating switch, the fixed stroke of the isolating switch is used as a hard limit, so that the situation that the isolating action is not in place can be effectively reduced, but simultaneously, a connecting rod between the operation mechanism and the isolating switch and the motor must bear certain overload internal stress and overload output; the service life of the reduction box and the motor is directly influenced; and when the isolating switch is stuck under a special condition, all links in the transmission process are in dead lock connection, and the operating mechanism can be damaged by overload.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem of the overload of the motor, the utility model provides an isolating switch's electric operating device has adopted the static friction to connect among this isolating switch's electric operating device's the drive mechanism, can release the internal stress that produces when the system transships from this to transmission structure part and motor have been protected and have been avoided transshipping the influence and damage.

The utility model provides a technical scheme that its technical problem adopted is: an electric operating device of an isolating switch comprises a motor, a transmission mechanism and an output shaft, wherein the motor can drive the output shaft to rotate through the transmission mechanism, the transmission mechanism comprises a worm wheel and a first friction disc, the axis of the worm wheel is overlapped with the axis of the output shaft, the first friction disc is fixed relative to the output shaft, and the worm wheel and the first friction disc can synchronously rotate by taking the axis of the output shaft as a shaft or the worm wheel can rotate relative to the first friction disc by taking the axis of the output shaft as a shaft.

The first friction disk is in contact with the worm wheel, and sliding friction force or static friction force can exist between the first friction disk and the worm wheel.

The worm wheel is sleeved outside the output shaft, the axis of the first friction disc is overlapped with the axis of the worm wheel, and the first friction disc and the worm wheel are arranged in a stacked mode.

The transmission mechanism further comprises a second friction disc, the first friction disc, the worm wheel and the second friction disc are sequentially stacked and arranged along the axial direction of the output shaft, and the second friction disc is fixed relative to the first friction disc.

The first and second friction disks sandwich the worm gear, which when rotated causes the first and second friction disks to rotate.

The worm wheel is of a circular ring structure and comprises an axial inner through hole, the first friction disc and the second friction disc are fixedly connected through bolts, and the bolts penetrate through the axial inner through hole.

The transmission mechanism further comprises a worm wheel bearing plate, the worm wheel bearing plate is sleeved outside the output shaft, the first friction plate, the worm wheel bearing plate and the second friction plate are sequentially connected in a stacked mode along the axis direction of the output shaft, and the worm wheel bearing plate is fixed relative to the first friction plate.

The worm wheel bearing plate is matched with the worm wheel for insertion, and when the worm wheel rotates, the worm wheel can apply friction force to the worm wheel bearing plate and enable the worm wheel bearing plate to rotate.

The electric operating device of the isolating switch further comprises a box body and an inner mounting frame, the output shaft penetrates through the inner mounting frame, the worm wheel bearing disc is connected with a limiting part, and the limiting part can limit the rotating range of the output shaft.

The limiting piece is a metal bolt, the limiting piece penetrates through the first friction disc, the inner mounting frame is provided with a first limiting convex edge and a second limiting convex edge, and when the first friction disc rotates to a clockwise limiting position, the limiting piece is abutted to the first limiting convex edge; when the first friction disc rotates to the anticlockwise limit position, the limiting piece is abutted to the second limiting convex rib.

The utility model has the advantages that: the electric operating device of the isolating switch protects equipment from being damaged by overload, and the transmission structure assembly adopts an open-type assembly design, so that the shell of the traditional reduction gearbox is removed, and a convenient and fast maintenance mode is provided; the traditional reduction gearbox shell is almost all produced by die casting due to the complex and special shape and structure, so that unnecessary reduction gearbox shell is removed, and the die processing cost with long time consumption and high cost is saved.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

Fig. 1 is a schematic front view of an electric operation device of the isolating switch of the present invention.

Fig. 2 is a rear view of the electric operation device of the isolating switch of the present invention.

Fig. 3 is a schematic perspective view of an electric operation device of the isolating switch of the present invention.

Fig. 4 is a schematic front view of the internal mechanism of the electric operation device of the disconnecting switch of the present invention.

Fig. 5 is a right-side view schematically illustrating an internal mechanism of the electric operation device of the disconnecting switch according to the present invention.

Fig. 6 is a schematic bottom view of the internal mechanism of the electric operating device of the disconnecting switch according to the present invention.

Fig. 7 is a schematic perspective view of an internal mechanism of an electric operation device of the disconnecting switch according to the present invention.

Fig. 8 is an enlarged schematic sectional view taken along a-a in fig. 1.

Fig. 9 is a schematic illustration of the disassembly of the first friction disk, worm gear carrier plate and second friction disk.

1. A motor; 2. a transmission mechanism; 3. an output shaft; 4. a box body; 5. an inner mounting frame;

21. a worm gear; 22. a first friction disk; 23. a second friction disk; 24. a worm wheel bearing disc; 25. a limiting member; 26. a pinion gear; 27. a bull gear; 28. a worm;

51. a first limit bead; 52. and a second limit convex rib.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

An electric operating device of an isolating switch comprises a motor 1, a transmission mechanism 2 and an output shaft 3 which are sequentially connected, wherein the motor 1 can drive the output shaft 3 to rotate through the transmission mechanism 2, the transmission mechanism 2 comprises a worm wheel 21 and a first friction disc 22, the axis of the worm wheel 21 is overlapped with the axis of the output shaft 3, and the first friction disc 22 is fixed relative to the output shaft 3; the worm wheel 21 and the first friction disk 22 can be synchronously rotated about the axis of the output shaft 3, or the worm wheel 21 can be rotated about the axis of the output shaft 3 with respect to the first friction disk 22, as shown in fig. 1 to 9.

When the output torque of the output shaft 3 is not overloaded, the worm wheel 21 and the first friction disk 22 can be synchronously rotated about the axis of the output shaft 3. When the output torque of the output shaft 3 is overloaded, the worm wheel 21 rotates relative to the first friction disc 22 by taking the axis of the output shaft 3 as the axis, namely, the worm wheel 21 and the output shaft 3 generate relative rotation, the transmission force during the overload of the system is counteracted through the connection characteristic, and meanwhile, the motor equipment is effectively protected from being damaged due to the overload.

In the present embodiment, relative movement or rotation between the first friction disk 22 and the output shaft 3 cannot occur, the first friction disk 22 is in direct contact with the worm wheel 21, a pressure, which may be a mechanical pressure or an electromagnetic pressure, exists between the first friction disk 22 and the worm wheel 21, and when the worm wheel 21 rotates, a sliding friction force or a static friction force can exist between the first friction disk 22 and the worm wheel 21.

In the present embodiment, the worm wheel 21 is fitted outside the output shaft 3, the axis of the output shaft 3 and the axis of the first friction disk 22 overlap the axis of the worm wheel 21, the first friction disk 22 and the worm wheel 21 are stacked, the end surface of the first friction disk 22 contacts the end surface of the worm wheel 21, and sliding friction force or static friction force can exist between the end surface of the first friction disk 22 and the end surface of the worm wheel 21.

In this embodiment, the transmission mechanism 2 may further include a second friction disk 23, the first friction disk 22, the worm wheel 21, and the second friction disk 23 may be stacked and aligned in this order in the axial direction of the output shaft 3, and the second friction disk 23 may be fixed to the first friction disk 22. The first friction disc 22 and the second friction disc 23 sandwich the worm wheel 21 (in this case it is understood that the electrically operated device of the disconnector does not yet comprise a worm wheel carrier plate 24).

When the worm wheel 21 rotates, sliding friction force or static friction force can exist between the second friction disk 23 and the worm wheel 21, the worm wheel 21 can enable the first friction disk 22 and the second friction disk 23 to rotate synchronously with the axis of the output shaft 3 as an axis, or the worm wheel 21 can rotate around the axis of the output shaft 3 relative to the first friction disk 22 and the second friction disk 23 (i.e., the first friction disk 22 and the second friction disk 23 are kept stationary).

In this embodiment, the worm wheel 21 is of a circular ring structure, the worm wheel 21 has an axially inner through hole, and the first friction disk 22 and the second friction disk 23 are fixed by a bolt and a nut, and the bolt passes through the axially inner through hole. The bolt does not block the rotation of the worm wheel 21 relative to the first friction disc 22 and the second friction disc 23, and the clamping force of the first friction disc 22 and the second friction disc 23 clamping the worm wheel 21 can be adjusted by adjusting the tightness of the bolt, so that the sliding friction force or the static friction force between the first friction disc 22 and the second friction disc 23 and the worm wheel 21 and the output torque of the output shaft 3 can be adjusted.

In this embodiment, the transmission mechanism 2 may further include a worm wheel bearing plate 24, the worm wheel bearing plate 24 is sleeved outside the output shaft 3, the first friction disc 22, the worm wheel 21, the worm wheel bearing plate 24, and the second friction disc 23 are sequentially stacked and connected along an axial direction of the output shaft 3, the worm wheel bearing plate 24 is fixed with respect to the first friction disc 22, the worm wheel bearing plate 24, and the second friction disc 23 are connected and fixed as a whole through bolts and nuts, and the second friction disc 23 is connected with the output shaft 3 through a snap spring.

In this embodiment, the worm wheel carrier plate 24 is connected with the output shaft 3 through a key, the worm wheel carrier plate 24 is inserted in the worm wheel 21 in a matching manner, when the worm wheel 21 rotates, sliding friction force or static friction force can exist between the end face of the worm wheel carrier plate 24 and the end face of the worm wheel 21, the worm wheel 21 can apply friction force to the worm wheel carrier plate 24 and enable the worm wheel carrier plate 24 to rotate, or the worm wheel 21 can rotate relative to the worm wheel carrier plate 24.

In this embodiment, the electric operating device of the disconnecting switch may only include the first friction disk 22, or the electric operating device of the disconnecting switch may include both the first friction disk 22 and the second friction disk 23, or the electric operating device of the disconnecting switch may include both the first friction disk 22, the second friction disk 23 and the worm wheel bearing disk 24 (the second friction disk 23 is not included in fig. 1), or the electric operating device of the disconnecting switch may include both the first friction disk 22 and the worm wheel bearing disk 24, and the connection relationship between the first friction disk 22, the second friction disk 23 and the worm wheel bearing disk 24 and the worm wheel 21 is similar to that of the existing friction clutch.

In this embodiment, isolator's electrically operated device still includes box 4 and interior mounting bracket 5, and motor 1 and drive mechanism 2 all are located box 4, and motor 1 and drive mechanism 2 all install on interior mounting bracket 5, and output shaft 3 passes interior mounting bracket 5, and worm wheel bears dish 24 rigid connection has locating part 25, and locating part 25 can restrict output shaft 3's rotation range.

In this embodiment, the limiting member 25 is a metal bolt, the limiting member 25 may be referred to as a hard limiting member, the limiting member 25 penetrates through the first friction disc 22, the inner mount 5 is provided with a first limiting protrusion 51 and a second limiting protrusion 52, and the first limiting protrusion 51 and the second limiting protrusion 52 both extend along a diameter direction of the first friction disc 22. When the first friction disc 22 rotates to the clockwise limit position, the limiting member 25 abuts against the first limiting rib 51, and the first friction disc 22 can not rotate any more; when the first friction disk 22 rotates to the counterclockwise limit position, the limiting member 25 abuts against the second limiting rib 52, and the first friction disk 22 can no longer rotate.

In the embodiment, the transmission mechanism 2 further comprises a pinion 26, a gearwheel 27 and a worm 28 which are connected in sequence, the gearwheel 27 and the worm 28 are coaxially and fixedly connected, the motor 1 is connected with the worm wheel 21 in sequence through the pinion 26, the gearwheel 27 and the worm 28, and the motor 1 can drive the output shaft 3 to rotate around the axis of the output shaft 3 through the transmission mechanism 2.

The operation of the electrically operated device of the disconnector will now be described by way of example as it comprises a first friction disc 22, a second friction disc 23 and a worm-wheel carrier disc 24.

In normal operation, the motor 1 drives the output shaft 3 to rotate by a required angle through the pinion 26, the gearwheel 27, the worm 28, the worm wheel 21, the first friction disc 22 and the worm wheel bearing disc 24 in sequence. In this process, there is a static friction force between the first friction disk 22 and the worm wheel carrier disk 24 and the worm wheel 21, and by virtue of this static friction force, the worm wheel 21, the first friction disk 22, the second friction disk 23, and the worm wheel carrier disk 24 synchronously rotate about the axis of the output shaft 3.

When a fault occurs, if the output shaft 3 is blocked and cannot rotate, that is, the first friction disk 22, the second friction disk 23, the worm wheel bearing disk 24 and the output shaft 3 are kept static (neither moving nor rotating), and the motor 1 still drives the worm wheel 21 to rotate, the sliding friction force between the worm wheel 21 and the first friction disk 22 and the worm wheel bearing disk 24 is greater than the maximum static friction force between the worm wheel 21 and the first friction disk 22 and the worm wheel bearing disk 24, and the sliding between the worm wheel 21 and the first friction disk 22 and the worm wheel bearing disk 24 is greater than the maximum static friction force between the worm wheel 21 and the worm wheel bearing disk 24, that is, the worm wheel 21 rotates around the axis of the output shaft 3 relative to the first friction disk 22, the second friction disk 23.

When the limiting member 25 abuts against the first limiting rib 51 or the second limiting rib 52, the above-mentioned fault condition will also occur in the worm wheel 21, and the present invention is not described in detail. The hard limit is added on the operating mechanism, so that the output of a fixed stroke or a fixed rotation angle is realized, when the hard limit is collided, if the system has excessive power output, the output worm wheel is not locked and connected with the output shaft of the operating mechanism, the output shaft of the operating mechanism is blocked by the hard limit, the worm wheel can continue to rotate to eliminate excessive output, and the parts are prevented from being damaged by internal stress in the structure; correspondingly, if the isolating switch breaks down or is stuck, the operating mechanism is used for operation, the isolating switch breaks down and does not move, the output shaft of the operating mechanism cannot move, the normal output of the motor of the operating mechanism cannot be affected by the blocking of the isolating switch by the output shaft of the operating mechanism through the worm gear disc, the overload hidden danger of the transmission structure of the motor and the operating mechanism is eliminated through the rotation of the worm gear disc, and the condition that the motor and the transmission structure of the operating mechanism cannot be damaged due to overload is achieved.

The above description is only for the specific embodiments of the present invention, and the scope of the present invention can not be limited by the embodiments, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should still belong to the scope covered by the present patent. In addition, the utility model provides an between technical feature and the technical feature, between technical feature and technical scheme, technical scheme and the technical scheme all can the independent assortment use.

Claims

1. The electric operating device of the isolating switch is characterized by comprising a motor (1), a transmission mechanism (2) and an output shaft (3), wherein the motor (1) can drive the output shaft (3) to rotate through the transmission mechanism (2), the transmission mechanism (2) comprises a worm wheel (21) and a first friction disc (22), the axis of the worm wheel (21) is overlapped with the axis of the output shaft (3), the first friction disc (22) is fixed relative to the output shaft (3), the worm wheel (21) and the first friction disc (22) can synchronously rotate by taking the axis of the output shaft (3) as an axis, or the worm wheel (21) can rotate by taking the axis of the output shaft (3) as an axis relative to the first friction disc (22).

2. An electrically operated device of a disconnector according to claim 1, characterized in that the first friction disc (22) is in contact with the worm wheel (21), and that sliding friction or static friction can exist between the first friction disc (22) and the worm wheel (21).

3. The electric operating device of the disconnecting switch according to claim 2, wherein the worm wheel (21) is sleeved outside the output shaft (3), the axis of the first friction disk (22) is coincident with the axis of the worm wheel (21), and the first friction disk (22) and the worm wheel (21) are arranged in a stacked manner.

4. An electrically operated device of a disconnector according to claim 3, characterized in that the transmission mechanism (2) further comprises a second friction disc (23), the first friction disc (22), the worm wheel (21) and the second friction disc (23) being arranged in a stacked arrangement in the axial direction of the output shaft (3), the second friction disc (23) being fixed relative to the first friction disc (22).

5. An electrically operated device of a disconnector according to claim 4, characterized in that the first friction disc (22) and the second friction disc (23) clamp the worm wheel (21), the worm wheel (21) being able to rotate the first friction disc (22) and the second friction disc (23) when the worm wheel (21) is rotated.

6. An electrically operated device of a disconnector according to claim 4, characterized in that the worm wheel (21) is of annular configuration, the worm wheel (21) comprising an axially inner through hole, the first friction disc (22) and the second friction disc (23) being secured by a bolt connection, said bolt passing through said axially inner through hole.

7. The electric operating device of the isolating switch according to claim 4, wherein the transmission mechanism (2) further comprises a worm wheel bearing plate (24), the worm wheel bearing plate (24) is sleeved outside the output shaft (3), the first friction disk (22), the worm wheel (21), the worm wheel bearing plate (24) and the second friction disk (23) are sequentially connected in a stacked manner along the axial direction of the output shaft (3), and the worm wheel bearing plate (24) is fixed relative to the first friction disk (22).

8. The electric operating device of the isolating switch according to claim 7, characterized in that the worm wheel carrier plate (24) is in matching insertion with the worm wheel (21), when the worm wheel (21) rotates, the worm wheel (21) can apply friction force to the worm wheel carrier plate (24) and rotate the worm wheel carrier plate (24).

9. The electric operating device of the isolating switch according to claim 7, further comprising a box body (4) and an inner mounting frame (5), wherein the output shaft (3) passes through the inner mounting frame (5), the worm wheel bearing disc (24) is connected with a limiting member (25), and the limiting member (25) can limit the rotation range of the output shaft (3).

10. The electrically operated device of the disconnecting switch according to claim 9, wherein the stopper (25) is a metal pin, the stopper (25) penetrates the first friction disk (22), the inner mounting bracket (5) is provided with a first stopper rib (51) and a second stopper rib (52), and when the first friction disk (22) rotates to the clockwise limit position, the stopper (25) abuts against the first stopper rib (51); when the first friction disc (22) rotates to the anticlockwise limit position, the limiting piece (25) is abutted with the second limiting convex rib (52).