CN211629015U

CN211629015U - Transmission mechanism based on automatic reclosing circuit breaker

Info

Publication number: CN211629015U
Application number: CN202020563264.9U
Authority: CN
Inventors: 李欣; 李博琛; 吕庆永
Original assignee: XIAMEN TAIHANG TECHNOLOGY CO LTD
Current assignee: XIAMEN TAIHANG TECHNOLOGY CO LTD
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-10-02
Anticipated expiration: 2030-04-16

Abstract

The application relates to the field of electrical equipment, and discloses a transmission mechanism based on an automatic reclosing circuit breaker, which is used for converting the rotation of a motor in the automatic reclosing circuit breaker into the reclosing/opening action of an operating handle, and comprises a first transmission piece in transmission connection with the operating handle through a linkage shaft and a second transmission piece in transmission connection with the motor; the first transmission piece and the second transmission piece are in clearance transmission; when the circuit breaker is closed, a distance for the first transmission piece to move to the open-circuit state of the circuit breaker exists between the first transmission piece and the second transmission piece in the transmission direction. The utility model discloses well operating handle passes through the universal driving shaft and is connected with the transmission of first transmission piece, avoids the lug connection of operating handle and driving medium, and can set up a plurality of operating handle on the universal driving shaft, makes a plurality of operating handle autoeclosing mechanism that can share in the circuit breaker, saves space.

Description

Transmission mechanism based on automatic reclosing circuit breaker

Technical Field

The utility model relates to an electrical equipment field, concretely relates to drive mechanism based on automatic reclosing circuit breaker.

Background

An automatic reclosing circuit breaker is a circuit breaker provided with an automatic reclosing mechanism, and the automatic reclosing is a facility for automatically reclosing the circuit breaker by using a mechanical device or a relay automatic device after the circuit breaker is opened due to a certain fault. The automatic reclosing mechanism is internally provided with a motor which provides power for the closing of the circuit breaker. In the prior art, the automatic reclosing mechanism usually adopts the power transmission sequence of the motor, the reversing mechanism and the speed reducing mechanism, the speed reducing mechanism is directly connected with the operating handle, the operation handle is actually linked with the motor, a buffer device is lacked, the loss of parts is extremely large, and the influence of the loss of the parts on the transmission effect is large.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned problem that prior art exists, this application provides a drive mechanism based on automatic reclosing circuit breaker.

The technical scheme adopted by the application is as follows:

a transmission mechanism based on an automatic reclosing circuit breaker is used for converting the rotation of a motor in the automatic reclosing circuit breaker into the reclosing/opening action of an operating handle, and comprises a first transmission piece and a second transmission piece, wherein the first transmission piece is in transmission connection with the operating handle through a linkage shaft, and the second transmission piece is in transmission connection with the motor; the first transmission piece and the second transmission piece are in clearance transmission; when the circuit breaker is closed, a distance for the first transmission piece to move to the open-circuit state of the circuit breaker exists between the first transmission piece and the second transmission piece in the transmission direction.

In the scheme, the first transmission piece is connected with the operating handles through the linkage shaft, and the linkage shaft can be provided with a plurality of operating handles, so that the first transmission piece can simultaneously control the plurality of operating handles to move. In contrast, the prior art often directly uses the transmission part to be connected with the operating handle, and the single connection mode is unfavorable for setting up automatic reclosing mechanism in the circuit breaker of zero line live wire single control like this. Meanwhile, the operating handle is indirectly connected with the transmission piece, so that the parts are protected.

It should be noted that the gap transmission in this embodiment means that when the second transmission member starts to move, the first transmission member is not immediately driven to move, but after a certain gap time (i.e. after the second transmission member moves for a certain time, which also means that the second transmission member has a certain interval with the first transmission member in its movement stroke), the second transmission member starts to transmit to the first transmission member. This kind of transmission mode does the utility model discloses a key, because the volume of circuit breaker itself is less, the output speed of motor is after the promotion moment of torsion and the speed reduction through reduction gears, and the velocity of motion of second driving medium is slower, and consequently, the stable process of velocity of motion is enlargied from starting to the second driving medium. The first transmission piece and the second transmission piece are arranged in a clearance transmission mode, so that the second transmission piece can transmit to the first transmission piece when the movement speed is stable, and the stability of the transmission process is guaranteed. Meanwhile, the transmission process is a process of switching on/off the circuit breaker by driving the motor, when the circuit breaker is automatically switched off due to a fault, the first transmission piece can move under the action of linkage due to the movement of the operating handle, and the second transmission piece has a certain interval with the first transmission piece in the movement stroke, so that when the interval is larger than the movement stroke of the first transmission piece, the movement of the first transmission piece cannot influence the second transmission piece during switching off, and the action force in the reverse direction of the first transmission piece cannot be applied like the motor, so that the motor can be protected.

Furthermore, the second transmission piece is rotatably connected with the first transmission piece, a pushing block is arranged on the second transmission piece, and a fixed block is arranged on the first transmission piece; the second transmission piece drives the pushing block to rotate, so that the pushing block is contacted with the fixing block and pushes the fixing block to rotate, and therefore the action of the operating handle is controlled.

In the scheme, the second transmission piece is rotatably connected with the first transmission piece, so that the second transmission piece can independently rotate relative to the first transmission piece, and when the second transmission piece rotates, the pushing block is contacted with the fixed block to enable the first transmission piece to rotate. In the prior art, the second transmission part is sleeved on the first transmission part and is transmitted through friction force between sleeved contact surfaces, the contact surfaces are easy to wear, and linkage failure is caused due to serious wear, so that the service life of parts is influenced. Promote the fixed block through promoting the piece and rotate in this scheme, even promote the contact surface wearing and tearing of piece and fixed block and do not influence its transmission effect yet, prolonged the maintenance cycle and the life of part.

Further, the arc length between the pushing block and the fixed block is larger than or equal to the rotating arc length of the fixed block in the state that the breaker is switched on and switched off.

The scheme provides a distribution condition of the pushing block and the fixing block in a static state, and explains how to realize clearance transmission between the first transmission piece and the second transmission piece. In a static state, a certain distance is kept between the pushing block and the fixed block, so that the movement acceleration process can be controlled before the pushing block moves to a position in contact with the fixed block, and after the movement speed is stable and unchanged, the pushing block starts to push the fixed block to rotate to a position for switching on or switching off the circuit breaker.

In addition, the pushing block and the fixed block keep a certain distance to prevent the fixed block from moving reversely when the circuit breaker trips. Because, during reverse motion, the fixed block needs to make and promotes piece and the first driving medium, second driving medium, third driving medium, reduction gears and the motor motion of connecting, and fixed block pivoted power is difficult to make when the circuit breaker trips promotes the piece and rotates, even promotes the piece and rotates, also great to the loss of part. Therefore, the distance between the pushing block and the fixing block can ensure the normal tripping of the circuit breaker.

Furthermore, the power output end of the motor is connected with a third transmission member, and the second transmission member and the third transmission member are bevel gears which are in meshed transmission with each other.

This scheme adopts two intermeshing's bevel gear transmission and switching-over, and in general machinery, the angle of intersection between the bevel gear diaxon equals 90 degrees, uses the mechanism of switching-over to be favorable to reducing its space that occupies in the circuit breaker in automatic reclosing mechanism.

Furthermore, the pushing block and the fixed block are both provided with mounting holes for mounting magnetic elements.

The magnetic elements are arranged on the pushing block and the fixed block to be matched with the Hall sensors, therefore, the circuit breaker is provided with two Hall sensors which respectively correspond to the two magnetic elements, when the magnetic elements rotate along with the pushing block and the fixed block, the Hall sensors sense the position, the displacement or the rotating speed and the like of the magnetic elements, and the sensed data is calculated, and the rotating speed or the starting and stopping of the motor are controlled through a data transmission and control circuit.

Further, the linkage shaft is a polygonal rod.

Furthermore, the cross section of the universal driving shaft is a regular hexagon.

The universal driving shaft is an important part for linking the first transmission piece with the operating handle, a common cylindrical rod in the prior art is adopted, in order to enable linkage between the first transmission piece and the operating handle, fixed connection between the cylindrical rod and the first transmission piece and the operating handle needs to be guaranteed, connection modes such as key connection or interference fit are often selected, and the mode is extremely inconvenient to disassemble and overhaul or replace parts. In the scheme, the linkage shaft adopts a polygonal rod structure, so that the linkage rod and the first transmission piece can be prevented from rotating relatively, and the transmission effect is not influenced.

In addition, the selectable cross section of the universal driving shaft is triangular, rectangular or pentagonal and the like, but through testing, the included angle of the triangle is an acute angle which is not beneficial to the transmission of the universal driving shaft, and a large torque is needed during starting, and a large starting torque is needed by the right angle of the rectangle as well as the triangle. When the cross section is a regular hexagon, the transmission efficiency is optimal. Similarly, the regular octagon has the same good transmission effect but higher process requirement. The universal driving shaft with the regular hexagonal section has low process requirements but can realize better transmission effect, and is the most preferable.

Further, the second transmission piece is a rack which moves along a straight line.

This scheme provides another kind of structure of second driving medium, sets up the second driving medium into the rack, because the motor rotates the output, consequently, is provided with gear structure between motor and the second driving medium, and the gear rack transmission still can realize the transformation of direction of motion.

The utility model has the advantages that: the utility model discloses establish operating handle cover on the universal driving shaft, make operating handle and other independent rotations of mechanism, then can set up a plurality of operating handle on the universal driving shaft, a plurality of operating handle autoeclosing mechanism that can share in the circuit breaker saves space. Meanwhile, the purpose that the bevel gear mechanism is converted into the first transmission piece in a rotating mode is achieved by pushing the fixed block to move through the pushing block, and therefore the transmission effect is not affected by part abrasion.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic view of the disassembled structure of the present invention;

FIG. 2 is a schematic structural view of the operating handle, the second transmission member and the first transmission member of the present invention;

fig. 3 is a schematic structural view of the operating handle, the third transmission member, the second transmission member and the first transmission member of the present invention;

FIG. 4 is a schematic structural view after the assembly of the present invention is assembled;

FIG. 5 is a schematic structural diagram of the present invention applied to an automatic reclosing mechanism;

fig. 6 is a disassembled schematic view of a circuit breaker incorporating the present invention;

fig. 7 is a schematic diagram of the overall structure of a circuit breaker incorporating the present invention;

in the figure: 1-a linkage shaft; 2-a third transmission member; 3-a first transmission member; 31-fixing block; 32-a first mounting hole; 33-a via hole; 4-a second transmission member; 41-pushing block; 42-a second mounting hole; 5-operating a handle; 51-connecting hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the application is used, the description is only for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application. Furthermore, the appearances of the terms "first," "second," and the like in the description herein are only used for distinguishing between similar elements and are not intended to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present application do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Example 1:

the transmission mechanism based on the automatic reclosing circuit breaker, as shown in fig. 1-4, is used for converting the rotation of a motor in the automatic reclosing circuit breaker into the reclosing/opening action of an operating handle 5, and comprises a first transmission piece 3 in transmission connection with the operating handle 5 through a linkage shaft 1, and a second transmission piece 4 in transmission connection with the motor; the first transmission piece 3 and the second transmission piece 4 are in clearance transmission; when the circuit breaker is closed, a distance for the first transmission piece 3 to move to the open-brake state of the circuit breaker exists between the first transmission piece 3 and the second transmission piece 4 in the transmission direction. The second transmission piece 4 is rotationally connected with the first transmission piece 3, a pushing block 41 is arranged on the second transmission piece 4, and a fixed block 31 is arranged on the first transmission piece 3; the second transmission piece 4 drives the pushing block 41 to rotate to contact with the fixed block 31 and pushes the fixed block 31 to rotate so as to control the operation of the operating handle 5. The arc length between the pushing block 41 and the fixed block 31 is greater than or equal to the rotation arc length of the fixed block 31 in the state that the breaker is switched on and switched off. The power output end of the motor is connected with the third transmission member 2, and the second transmission member 4 and the third transmission member 2 are bevel gears which are in meshed transmission.

The working principle is as follows:

third driving medium 2 is connected with the power take off of motor, and is concrete, still includes motor and reduction gears in the coincidence floodgate mechanism, and the power of the output of motor is through reduction gears's speed reduction back, the rethread the utility model provides a switching-over coincidence mechanism transmits to operating handle 5, and the power input end that third driving medium 2 is connected is in the utility model discloses an in the implementation mean reduction gears's end, also the utility model discloses holistic power input end.

The second transmission piece 4 and the third transmission piece 2 adopt bevel gear transmission which is meshed with each other, so that the axes of the two gears form a 90-degree included angle, and 90-degree conversion of the rotation direction is completed. The second transmission member 4 is rotatably connected to the first transmission member 3, so that the second transmission member 4 and the first transmission member 3 rotate independently, that is, the second transmission member 4 can rotate relative to the first transmission member 3. When the second transmission member 4 rotates, the pushing block 41 which is integrated with the second transmission member 4 is close to the fixing block 31 on the first transmission member 3 and then contacts with the fixing block, the second transmission member 4 continues to rotate, the pushing block 41 pushes the fixing block 31 and the first transmission member 3 to rotate, the first transmission member 3 and the operating handle 5 are fixedly sleeved on the universal driving shaft 1, and the operating handle 5 rotates under the action of the universal driving shaft 1 while the first transmission member 3 rotates.

Above-mentioned process does the utility model discloses the process of 5 motions of drive operating handle specifically to the circuit breaker, is exactly the process of operating handle 5 combined floodgate or breaking brake.

It should be noted that fig. 1 shows an example of the first transmission member 3, the second transmission member 4 and the third transmission member 2, the first transmission member 3 is arranged to be sleeved on the linkage shaft 1 in a sleeve shape, and the second transmission member 4 is arranged to be provided with an inner hole to be sleeved on the first transmission member 3. In addition, if the mutual rotational movement between the first transmission member 3 and the second transmission member 4 needs to be smoother, a micro-bearing may be disposed between the first transmission member 3 and the second transmission member 4.

It should be noted that fig. 4 shows the operating handle 5 in the open position, in which the arc length between the pushing block 41 and the fixed block 31 is equal to the rotation arc length of the operating handle 5 when the circuit breaker is closed. Because the motor has a small acceleration process from starting to stable rotating speed, the process of the motor is negligible, but after passing through the speed reducing mechanism and the transmission mechanism, the acceleration process is amplified equivalently. Specifically, in the movement of the pushing block 41, a certain distance is arranged between the pushing block 41 and the fixed block 31, so that the accelerating movement process of the pushing block 41 can be limited between the contact fixed blocks 31, and when the moving speed of the pushing block 41 is stable or is about to reach a stable state, the fixed block 31 starts to be pushed to move, so that the movement of the fixed block 31 is more stable.

It should be noted that, when the pushing block 41 pushes the fixed block 31 to move to a position for closing or opening the brake, at this time, the pushing block 41 and the fixed block 31 are still in a state of mutual contact, and the motor needs to be reversely rotated to reversely move the pushing block 41 to a position for keeping a certain distance from the fixed block 31.

In addition, a certain distance is kept between the pushing block 41 and the fixed block 31, so that the fixed block 31 is prevented from moving reversely when the circuit breaker trips. Because the fixed block 31 is connected with the bevel gear mechanism, the speed reducing mechanism and the motor, when the circuit breaker trips, the pushing block 41 is difficult to rotate by the rotating force of the fixed block 31, and even if the pushing block 41 rotates, the loss of parts is large.

Example 2:

in this embodiment, further optimization and limitation are performed on the basis of embodiment 1.

As shown in fig. 2, the pushing block 41 and the fixing block 31 are provided with mounting holes for mounting magnetic elements.

The working principle is as follows;

in order to realize automatic control of the automatic reclosure, the position of the operating handle 5 can be monitored by using a hall sensor and the like, so that mounting holes for mounting magnetic elements are formed in the pushing block 41 and the fixed block 31, as shown in fig. 2, a first mounting hole 32 is formed in the fixed block 31 of the first transmission piece 3, a second mounting hole 42 is formed in the pushing block 41 of the second transmission piece 4, when the circuit breaker is used, the magnetic elements are respectively mounted in the first mounting hole 32 and the second mounting hole 42, and the hall sensor is arranged around the magnetic elements in the circuit breaker. Preferably, one hall sensor is arranged in the vicinity of each of the two magnetic elements. The magnetic element generates a magnetic field, so that the hall sensor determines the position of the operating handle 5 according to the position of the magnetic element, and the state of the circuit breaker in closing or breaking is judged.

Example 3:

the present embodiment further optimizes and defines the shape of the linkage shaft 1 on the basis of the above embodiments.

As shown in fig. 1, the linkage shaft 1 is a polygonal rod, and the cross section of the linkage shaft 1 is a regular hexagon. Meanwhile, in order to ensure that the first transmission piece 3 and the operating handle 5 do not rotate relative to the linkage shaft 1, the shape of the through hole 33 where the first transmission piece 3 is matched with the linkage shaft 1 is the same as the shape of the cross section of the linkage shaft 1, and the shape of the connecting hole 51 where the operating handle 5 is matched with the linkage shaft 1 is the same as the shape of the cross section of the linkage shaft 1.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides a drive mechanism based on automatic reclosing circuit breaker for the rotation of motor converts the coincidence/the separating brake action of operating handle (5) in the automatic reclosing circuit breaker, its characterized in that: comprises a first transmission piece (3) which is in transmission connection with an operating handle (5) through a linkage shaft (1) and also comprises a second transmission piece (4) which is in transmission connection with a motor;

the first transmission piece (3) and the second transmission piece (4) are in clearance transmission;

when the circuit breaker is closed, a distance for the first transmission piece (3) to move to the open state of the circuit breaker exists between the first transmission piece (3) and the second transmission piece (4) in the transmission direction.

2. The transmission mechanism based on the automatic reclosing circuit breaker as recited in claim 1, further comprising: the second transmission piece (4) is rotationally connected with the first transmission piece (3), a pushing block (41) is arranged on the second transmission piece (4), and a fixed block (31) is arranged on the first transmission piece (3); the second transmission piece (4) drives the pushing block (41) to rotate to be in contact with the fixed block (31) and pushes the fixed block (31) to rotate, so that the operation handle (5) is controlled to act.

3. The transmission mechanism based on the automatic reclosing circuit breaker as recited in claim 2, further comprising: the arc length between the pushing block (41) and the fixed block (31) is larger than or equal to the rotating arc length of the fixed block (31) in the state that the breaker is switched on and switched off.

4. The transmission mechanism based on the automatic reclosing circuit breaker as recited in claim 3, further comprising: the power output end of the motor is connected with the third transmission piece (2), and the second transmission piece (4) and the third transmission piece (2) are bevel gears which are in meshed transmission.

5. The transmission mechanism based on the automatic reclosing circuit breaker as recited in claim 4, further comprising: the pushing block (41) and the fixed block (31) are provided with mounting holes for mounting magnetic elements.

6. The transmission mechanism based on an automatic reclosing circuit breaker according to any one of claims 1 to 5, characterised in that: the linkage shaft (1) is a polygonal rod.

7. The transmission mechanism based on the automatic reclosing circuit breaker as recited in claim 6, further comprising: the cross section of the linkage shaft (1) is in a regular hexagon shape.

8. The transmission mechanism based on the automatic reclosing circuit breaker as recited in claim 1, further comprising: the second transmission piece (4) is a rack which moves along a straight line.