CN212625439U - Circuit breaker transmission mechanism - Google Patents
Circuit breaker transmission mechanism Download PDFInfo
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- CN212625439U CN212625439U CN202021259560.6U CN202021259560U CN212625439U CN 212625439 U CN212625439 U CN 212625439U CN 202021259560 U CN202021259560 U CN 202021259560U CN 212625439 U CN212625439 U CN 212625439U
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- circuit breaker
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Abstract
The utility model provides a transmission mechanism of a circuit breaker, which comprises a circuit breaker shell, a rotating shaft, a gear, a rack, a connecting rod, a deflector rod, a first cylinder, a first spring, a first ejector rod, a second cylinder, a second spring, a second ejector rod, a push rod and a cylindrical shape memory alloy, one end of the rotating shaft is connected with the gear, one end of the deflector rod is connected with the gear, one end of the connecting rod is connected with the rack, one end of the first spring is fixedly connected with the bottom of the inner cavity of the first cylinder, the other end of the first spring is fixedly connected with one end of the first ejector rod, one end of the second spring is fixedly connected with the bottom of the inner cavity of the second cylinder, the other end of the second spring is fixedly connected with one end of the second ejector rod, a sliding groove is arranged on the side wall of the second cylinder, one end of the push rod is fixedly connected with the second ejector rod, the driving lever is provided with a slot therein, and one end of the cylindrical shape memory alloy is fixedly arranged at the bottom of the slot. The utility model discloses can generate heat when heaing up at the circuit breaker, the automatic disconnection circuit breaker.
Description
Technical Field
The utility model relates to a circuit breaker technical field particularly, relates to a circuit breaker drive mechanism.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition for a predetermined time. The circuit breaker generally drives the moving contact to be close to or far away from the fixed contact through a transmission mechanism so as to realize the on-off of the circuit breaker.
Due to the reasons of overload of a switch, loose virtual connection of a wiring terminal, long-time power-on use or poor heat dissipation and the like, the circuit breaker is easy to heat and heat, and has potential safety hazards. The existing circuit breaker transmission mechanism can realize the on-off of the circuit breaker, but can not automatically break the circuit breaker when the circuit breaker is heated and heated, and the circuit breaker transmission mechanism needs further improvement.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem that current circuit breaker drive mechanism can't automatic disconnection circuit breaker when the circuit breaker heaies up and generates heat, the utility model provides a circuit breaker drive mechanism, its concrete technical scheme as follows:
a circuit breaker transmission mechanism comprises a circuit breaker shell, a rotating shaft, a gear, a rack, a connecting rod and a driving lever, wherein one end of the rotating shaft is fixedly connected with the axle center of the gear, the other end of the rotating shaft is connected with the circuit breaker shell in a rotating manner, one end of the driving lever is fixedly connected with the axle center of the gear, the gear is meshed with the rack, one end of the connecting rod is fixedly connected with the rack, the other end of the connecting rod is fixedly connected with a leading-out end of a movable conducting rod of a circuit breaker arc extinguish chamber, the circuit breaker transmission mechanism further comprises an energy storage assembly, a bolt assembly and a cylindrical shape memory alloy, the energy storage assembly comprises a first cylinder, a first spring and a first ejector rod, one end of the first cylinder is opened and fixedly mounted on the circuit breaker shell, one end of the first spring is fixedly connected with the bottom of an inner cavity of the first cylinder, the other end, the bolt component comprises a second cylinder, a second spring, a second ejector rod and a push rod, wherein one end of the second cylinder is closed, the other end of the second cylinder is opened, the second cylinder is fixedly arranged on the shell of the circuit breaker, one end of the second spring is fixedly connected with the bottom of an inner cavity of the second cylinder, the other end of the second spring is fixedly connected with one end of the second ejector rod, a sliding groove is formed in the side wall of the second cylinder, one end of the push rod is fixedly connected with the second ejector rod, the other end of the push rod penetrates through the sliding groove and is positioned outside the second cylinder, an inserting groove is formed in the shift rod, one end of the cylindrical shape memory alloy is fixedly arranged at the bottom of the inserting groove, and when the shift rod rotates by taking the rotating shaft as a circle center to drive the gear to rotate so as to drive the rack and the connecting rod to move and enable the moving contact of, and when the moving contact of the circuit breaker is connected with the fixed contact, the second ejector rod is clamped in the slot under the elastic action of the second spring.
Optionally, when the circuit breaker is in a normal working state, the other end of the cylindrical shape memory alloy is located inside the slot, and when the circuit breaker is in an abnormal working state, the other end of the cylindrical shape memory alloy is located outside the slot.
Optionally, the other end of the first ejector rod is a circular arc-shaped bulge.
Optionally, the other end of the second ejector rod is a circular arc-shaped bulge.
Optionally, the shift lever is made of a hard insulating material, and the hard insulating material is plastic or ceramic.
Optionally, the other end of the shifting lever is sleeved with a rubber sleeve.
The utility model discloses the beneficial effect who gains does: through setting for energy storage component, bolt subassembly and cylinder shape memory alloy, not only can carry out normal switching on and off closed operation to the circuit breaker, can also generate heat when rising temperature at the circuit breaker, the automatic disconnection circuit breaker avoids accident such as conflagration to take place.
Drawings
A further understanding of the invention may be realized by reference to the following description taken in conjunction with the accompanying drawings, the emphasis instead being placed upon illustrating the principles of the embodiments.
Fig. 1 is a schematic diagram of an overall structure of a transmission mechanism of a circuit breaker according to an embodiment of the present invention;
fig. 2 is a schematic diagram of the structural relationship among the energy storage assembly, the latch assembly, the gear, and the shift lever according to the embodiment of the present invention;
fig. 3 is a schematic diagram of a structural relationship between a circuit breaker housing and a latch assembly according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a shift lever in the present novel embodiment.
Description of reference numerals:
1. a circuit breaker housing; 2. a rotating shaft; 3. a gear; 4. a rack; 5. a connecting rod; 6. a deflector rod; 7. a cylindrical shape memory alloy; 8. a first cylinder; 9. a first spring; 10. a first ejector rod; 11. a second cylinder; 12. a second spring; 13. a second ejector rod; 14. a push rod; 15. a chute;
16. and (4) a slot.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments.
The utility model relates to a circuit breaker drive mechanism, according to the following embodiment of the illustrated explanation of the attached drawing:
as shown in fig. 1, a circuit breaker drive mechanism, including circuit breaker housing 1, pivot 2, gear 3, rack 4, connecting rod 5 and driving lever 6, circuit breaker housing 1 is made by the plastics material, the one end of pivot 2 and the axle center fixed connection of gear 3, the other end of pivot 2 rotates with circuit breaker housing 1 to be connected, the one end of driving lever 6 and the axle center fixed connection of gear 3, gear 3 and rack 4 meshing, the one end and the rack 4 fixed connection of connecting rod 5, the other end of connecting rod 5 and the end fixed connection of drawing forth of circuit breaker explosion chamber movable conducting rod. Through rotating the driving lever 6, the gear 3 is driven to rotate by taking the rotating shaft 2 as a circle center, the rack 4 and the connecting rod 5 can be driven to move, and then a moving contact on the other end of the conducting rod of the arc extinguish chamber of the circuit breaker is close to or far away from a static contact, so that the circuit breaker is opened and closed.
As shown in fig. 1, 2 and 3, the circuit breaker transmission mechanism further includes an energy storage assembly, a latch assembly and a cylindrical shape memory alloy 7, the energy storage assembly includes a first cylinder 8, a first spring 9 and a first push rod 10, one end of the first cylinder 8 is closed and the other end is opened and fixedly mounted on the circuit breaker housing 1, one end of the first spring 9 is fixedly connected with the bottom of the inner cavity of the first cylinder 8, the other end of the first spring 9 is fixedly connected with one end of the first push rod 10, the latch assembly includes a second cylinder 11, a second spring 12, a second push rod 13 and a push rod 14, one end of the second cylinder 11 is closed and the other end is opened and fixedly mounted on the circuit breaker housing 1, one end of the second spring 12 is fixedly connected with the bottom of the inner cavity of the second cylinder 11, and the other end of the second spring 12 is fixedly connected with one end of the second push rod 13, a sliding groove 15 is arranged on the side wall of the second cylinder 11. One end of the push rod 14 is fixedly connected with the second push rod 13, the other end of the push rod 14 penetrates through the sliding groove 15 and is located outside the second cylinder 11, and the second push rod 13 can be pushed to the bottom of the inner cavity of the second cylinder 11 by pushing the push rod 14.
As shown in fig. 1, 2 and 4, a slot 16 matched with the plug pin assembly is arranged in the shift lever 6, one end of the cylindrical shape memory alloy 7 is fixedly installed at the bottom of the slot 16, the positions of the shift lever 6, the energy storage assembly and the plug pin assembly are matched with each other, and when the shift lever 6 rotates around the rotating shaft 2 to drive the gear 3 to rotate so as to drive the rack 4 and the connecting rod 5 to move and enable the movable contact of the circuit breaker to move towards the direction of the fixed contact, the shift lever 6 pushes the first push rod 10 to move towards the bottom of the inner cavity of the first cylinder 8. After the shift lever 6 and the gear 3 rotate counterclockwise by a certain angle, the shift lever 6 presses the second push rod 13 downward and makes the second push rod 13 move toward the bottom of the inner cavity of the second cylinder 11, and at this time, the second spring 12 compresses and stores elastic force. When the moving contact of the circuit breaker is connected with the fixed contact, the second ejector rod 13 is clamped in the slot 16 under the action of the elastic force of the second spring 12, and the positions of the shift lever 6 and the gear 3 are fixed.
The cylindrical shape memory alloy 7 has the characteristic of extending along the axial direction along with the temperature rise, when the circuit breaker is in a normal working state, the other end of the cylindrical shape memory alloy 7 is positioned in the slot 16, and the circuit breaker can be closed by rotating the deflector rod 6, the gear 3, the driving rack 4 and the connecting rod 5. After the circuit breaker is closed, the push rod 14 is pushed, the second push rod 13 is separated from the slot 16, and the deflector rod 6 is quickly disconnected under the elastic force of the first spring 9 and the action of the first push rod 10.
When the circuit breaker is heated to a certain degree and is in an abnormal working state, the other end of the cylindrical shape memory alloy 7 is positioned outside the slot 16. If the circuit breaker is in the open state, the second plunger 13 cannot be engaged in the slot 16 by the elastic force of the second spring 12, and the circuit breaker cannot be locked in the closed state. If the circuit breaker is locked in the closed state, the cylindrical shape memory alloy 7 extends, the second ejector rod 13 is separated from the slot 16, at the moment, the elastic force of the spring in the energy storage assembly is released, and the circuit breaker is rapidly switched from the closed state to the open state.
Here, the temperature at which the circuit breaker is in the abnormal operation state may be set according to actual conditions. As a preferred embodiment, if the temperature of the circuit breaker rises to 65 degrees, the circuit breaker is in a malfunctioning state. If the temperature of the circuit breaker is lower than 65 ℃, the circuit breaker is in a normal working state. The depth of the slot 16, the length of the cylindrical memory alloy, and the characteristics of the cylindrical memory alloy can be set according to the actual situation, and are not described herein again.
Through setting for energy storage component, bolt subassembly and cylinder shape memory alloy 7, not only can carry out normal switching on and off closed operation to the circuit breaker, can also generate heat when rising temperature at the circuit breaker, the automatic disconnection circuit breaker avoids accident such as conflagration to take place.
In some embodiments, the other end of the first lift pin 10 and the other end of the second lift pin 13 are both arc-shaped protrusions. Therefore, the shifting rod 6 can be better utilized to realize the opening and closing of the circuit breaker, the first ejector rod 10 is pressed to the bottom of the inner cavity of the first cylinder 8 to store energy through the first spring 9, and the second ejector rod 13 is pressed to the bottom of the inner cavity of the second cylinder 11 to facilitate the clamping of the second ejector rod 13 in the slot 16 in the closing process of the circuit breaker.
In some embodiments, the shift lever 6 is made of a hard insulating material, the hard insulating material is plastic or ceramic, and the other end of the shift lever 6 is sleeved with a rubber sleeve. So, can improve this circuit breaker striking mechanism's security performance, prevent accident such as electric shock.
To sum up, the utility model discloses produced beneficial technological effect does: through setting for energy storage component, bolt subassembly and cylinder shape memory alloy, not only can carry out normal switching on and off closed operation to the circuit breaker, can also generate heat when rising temperature at the circuit breaker, the automatic disconnection circuit breaker avoids accident such as conflagration to take place.
The above examples are to be understood as merely illustrative of the present invention and not as limiting the scope of the invention. After reading the description of the present invention, the skilled person can make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope of the present invention defined by the claims.
Claims (6)
1. A circuit breaker transmission mechanism comprises a circuit breaker shell, a rotating shaft, a gear, a rack, a connecting rod and a driving lever, wherein one end of the rotating shaft is fixedly connected with the axis of the gear, the other end of the rotating shaft is rotatably connected with the circuit breaker shell, one end of the driving lever is fixedly connected with the axis of the gear, the gear is meshed with the rack, one end of the connecting rod is fixedly connected with the rack, the other end of the connecting rod is fixedly connected with a leading-out end of a movable conducting rod of a circuit breaker arc extinguish chamber, the circuit breaker transmission mechanism is characterized in that the circuit breaker transmission mechanism further comprises an energy storage assembly, a bolt assembly and a cylindrical shape memory alloy, the energy storage assembly comprises a first cylinder, a first spring and a first ejector rod, one end of the first cylinder is closed, one end of the first cylinder is opened and fixedly arranged on the circuit breaker shell, the other end of the first spring is fixedly connected with one end of a first ejector rod, the bolt component comprises a second cylinder, a second spring, a second ejector rod and a push rod, one end of the second cylinder is closed, the other end of the second cylinder is open and fixedly arranged on the shell of the circuit breaker, one end of the second spring is fixedly connected with the bottom of the inner cavity of the second cylinder, the other end of the second spring is fixedly connected with one end of the second ejector rod, a sliding groove is formed in the side wall of the second cylinder, one end of the push rod is fixedly connected with the second ejector rod, the other end of the push rod penetrates through the sliding groove and is positioned outside the second cylinder, a slot is formed in the shift rod, one end of the cylindrical shape memory alloy is fixedly arranged at the bottom of the slot, and when the shift rod rotates by taking a rotating shaft as a circle center to drive the rack and the connecting rod to move and, the driving lever pushes the first ejector rod to move towards the bottom of the inner cavity of the first cylinder, and when a moving contact of the circuit breaker is connected with a fixed contact, the second ejector rod is clamped in the slot under the action of the elastic force of the second spring.
2. The circuit breaker actuator of claim 1, wherein the other end of the cylindrical shape memory alloy is positioned within the slot when the circuit breaker is in the normal operating condition and outside the slot when the circuit breaker is in the abnormal operating condition.
3. The transmission mechanism of claim 2, wherein the other end of the first plunger is a circular arc-shaped protrusion.
4. The transmission mechanism for circuit breaker according to claim 3, wherein the other end of the second plunger is a circular arc-shaped protrusion.
5. The circuit breaker drive mechanism of claim 4 wherein the lever is made of a hard insulating material, the hard insulating material being plastic or ceramic.
6. The transmission mechanism of claim 5, wherein the other end of the driving lever is sleeved with a rubber sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021259560.6U CN212625439U (en) | 2020-06-30 | 2020-06-30 | Circuit breaker transmission mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021259560.6U CN212625439U (en) | 2020-06-30 | 2020-06-30 | Circuit breaker transmission mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212625439U true CN212625439U (en) | 2021-02-26 |
Family
ID=74758102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021259560.6U Active CN212625439U (en) | 2020-06-30 | 2020-06-30 | Circuit breaker transmission mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212625439U (en) |
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2020
- 2020-06-30 CN CN202021259560.6U patent/CN212625439U/en active Active
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