CN214753533U - Permanent magnet vacuum circuit breaker - Google Patents
Permanent magnet vacuum circuit breaker Download PDFInfo
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- CN214753533U CN214753533U CN202121043816.4U CN202121043816U CN214753533U CN 214753533 U CN214753533 U CN 214753533U CN 202121043816 U CN202121043816 U CN 202121043816U CN 214753533 U CN214753533 U CN 214753533U
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- pull rod
- permanent magnet
- roller
- crank arm
- slot hole
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Abstract
A permanent magnet vacuum circuit breaker is provided with three circuit breaking units, wherein each circuit breaking unit comprises a permanent magnet mechanism, an insulating transmission rod, a pull rod and a vacuum arc extinguish chamber, a moving contact and a static contact are arranged in the vacuum arc extinguish chamber, the permanent magnet mechanism is in driving connection with the insulating transmission rod, the lower end of the insulating transmission rod is fixedly connected with the upper end of the pull rod, and the lower end of the pull rod is in driving connection with the moving contact; the device is also provided with a manual operating shaft extending transversely, each circuit breaking unit is correspondingly provided with a crank arm connected with the manual operating shaft, each crank arm is provided with a first long hole, and the surface of the middle section of each pull rod is convexly provided with a transmission pin; the surface of the transmission pin is respectively sleeved with a first roller and a second roller, and the first roller is sleeved in the first long hole of the corresponding crank arm; still be equipped with fixing support, fixing support be equipped with second gyro wheel complex second slot hole, the length of second slot hole is vertical two gyro wheels cover in fixing support's second slot hole. The utility model discloses enable pull rod vertical motion reliable and stable, improve vacuum circuit breaker's mechanical life.
Description
Technical Field
The utility model belongs to the technical field of electrical equipment, concretely relates to permanent magnetism vacuum circuit breaker.
Background
The breaker realizes the opening and closing actions by the contact or separation of the moving contact and the fixed contact, and the moving contact and the fixed contact are arranged in the vacuum chamber, so the breaker is called as a vacuum breaker; the operating mechanism for operating the circuit breaker is mainly of two types, namely a spring mechanism and an electromagnetic mechanism. The vacuum circuit breaker adopting the electromagnetic mechanism is called as a permanent magnet vacuum circuit breaker and is provided with a permanent magnet mechanism, an insulating transmission rod, a pull rod and a vacuum arc extinguish chamber, wherein a moving contact and a static contact are arranged in the vacuum arc extinguish chamber, the permanent magnet mechanism drives the pull rod through the insulating transmission rod, and the lower end of the pull rod is connected with the moving contact in the vacuum arc extinguish chamber, so that the moving contact can be driven to move by the electromagnetic force of the permanent magnet mechanism.
In addition, in order to urgently operate the circuit breaker when the permanent magnet mechanism has power failure, the conventional permanent magnet vacuum circuit breaker is further provided with a manual operation shaft 5 which extends transversely, as shown in fig. 1, the manual operation shaft 5 is connected with a crank arm 6 in a driving way, the crank arm 6 is provided with a long hole 71, a transverse transmission pin 9 is convexly arranged on the surface of the pull rod 3, and the transmission pin 9 is sleeved in the long hole 71 of the crank arm. Thus, when the manual operation shaft 5 is rotated by hand, the long hole 71 of the crank arm rotates around the central axis of the manual operation shaft 5, the crank arm 6 drives the transmission pin 9 to move, and the pull rod 3 is driven to move up and down, so that the circuit breaker is switched on and off.
However, the existing permanent magnet vacuum circuit breaker has the following problems: because the pressure applied to the pull rod 3 by the crank arm 6 is not exactly the axial direction of the pull rod 3 (the pressure direction is as an arrow in the state shown in fig. 1), but is a little included angle, a part of force of the pressure is converted into horizontal component force, the axial length of the pull rod is not small, and the lower end of the pull rod is lack of strong anchoring (the lower end of the pull rod and the movable contact are in elastic connection and loose fit connection), so that the up-and-down motion process of the pull rod caused by manual operation is unstable, the pull rod can shake along the horizontal direction, the verticality of the vacuum arc-extinguishing chamber in the opening and closing process is difficult to ensure, the abrasion is large, the mechanical life cannot meet the requirement of 10000 times, the force required by opening and closing is increased, and the operation difficulty is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above-mentioned problem and providing a permanent magnetism vacuum circuit breaker, it enables pull rod vertical motion reliable and stable, improves vacuum circuit breaker's mechanical life.
In order to achieve the purpose, the utility model discloses a permanent magnet vacuum circuit breaker is equipped with three circuit breaking units, and each circuit breaking unit comprises a permanent magnet mechanism, an insulating transmission rod, a pull rod and a vacuum arc extinguish chamber, wherein a moving contact and a static contact are arranged in the vacuum arc extinguish chamber, the permanent magnet mechanism is connected with the insulating transmission rod in a driving manner, the lower end of the insulating transmission rod is fixedly connected with the upper end of the pull rod, the lower end of the pull rod is connected with the moving contact in a driving manner, and the axial direction of the pull rod is vertical; the device is also provided with a manual operating shaft extending transversely, each circuit breaking unit is correspondingly provided with a crank arm connected with the manual operating shaft, each crank arm is provided with a first long hole, and the surface of the middle section of each pull rod is convexly provided with a transmission pin; the device is characterized in that a first roller and a second roller are respectively sleeved on the surface of the transmission pin, the diameter of the first roller is equal to the width of the first long hole, and the first roller is sleeved in the first long hole of the corresponding crank arm; still be equipped with fixing support, fixing support be equipped with second gyro wheel complex second slot hole, the length of second slot hole is vertical, the diameter of second gyro wheel equals the width of second slot hole, the second gyro wheel cover is in fixing support's second slot hole.
The utility model has the advantages of it is following and effect:
the second gyro wheel is restricted to remove in vertical second slot hole for the movement track of drive pin also is straight vertical, and the movement track of pull rod also is straight vertical (axial), and second slot hole and second gyro wheel still play the effect of centre gripping pull rod in addition, prevent that the pull rod from rocking, make pull rod vertical motion reliable and stable, thereby guarantee vacuum circuit breaker's switching on and off action reliability, improve vacuum circuit breaker's mechanical life, and can make the operation more laborsaving.
Drawings
Fig. 1 is a schematic view of a manual operation structure of a conventional permanent magnet vacuum circuit breaker.
Fig. 2 is an overall three-dimensional structure diagram of the embodiment of the present invention.
Fig. 3 is a perspective view of one breaking unit in fig. 2.
Fig. 4 is an exploded view of the structure shown in fig. 3.
Fig. 5 is a side view of the structure shown in fig. 3.
Fig. 6 is a schematic sectional view a-a in fig. 5.
Fig. 7 is a partially enlarged schematic view of B in fig. 6.
Fig. 8 is a schematic cross-sectional view of C-C in fig. 7.
Fig. 9 is a schematic cross-sectional view of D-D in fig. 7.
Detailed Description
The permanent magnet vacuum circuit breaker shown in fig. 2 is provided with three breaking units (corresponding to ABC three phases); as shown in fig. 2, 3, 4 and 5, each circuit breaking unit includes a permanent magnet mechanism 1, an insulating transmission rod 2, a pull rod 3 and a vacuum arc-extinguishing chamber 4, a moving contact and a fixed contact are arranged in the vacuum arc-extinguishing chamber 4, the permanent magnet mechanism 1 is connected with the insulating transmission rod 2 in a driving manner, the lower end of the insulating transmission rod 2 is fixedly connected with the upper end of the pull rod 3, the lower end of the pull rod 3 is connected with the moving contact in a driving manner, and the axial direction of the pull rod 3 is vertical; a manual operating shaft 5 extending transversely is also arranged; as shown in fig. 2, 3, 4, 5, 6, 7, 8 and 9, each circuit breaking unit is correspondingly provided with a crank arm 6 connected with a manual operating shaft, the crank arm 6 is provided with a first long hole 71, and the surface of the middle section of the pull rod 3 is convexly provided with a transmission pin 9; the surfaces of the left end and the right end of the transmission pin 9 are respectively sleeved with a first roller 81 and a second roller 82, the diameter of the first roller 81 is equal to the width of the first long hole 71, and the first roller 81 is sleeved in the first long hole 71 of the corresponding crank arm; still be equipped with fixing support 10, fixing support 10 is equipped with the second slot hole 72 with second gyro wheel 82 complex, and the length direction of second slot hole 72 is vertical, and the diameter of second gyro wheel 82 equals the width of second slot hole 72, and second gyro wheel 82 overlaps in fixing support's second slot hole 72.
Claims (1)
1. A permanent magnet vacuum circuit breaker is provided with three circuit breaking units, wherein each circuit breaking unit comprises a permanent magnet mechanism, an insulating transmission rod, a pull rod and a vacuum arc-extinguishing chamber, a moving contact and a static contact are arranged in the vacuum arc-extinguishing chamber, the permanent magnet mechanism is in driving connection with the insulating transmission rod, the lower end of the insulating transmission rod is fixedly connected with the upper end of the pull rod, the lower end of the pull rod is in driving connection with the moving contact, and the axial direction of the pull rod is vertical; the device is also provided with a manual operating shaft extending transversely, each circuit breaking unit is correspondingly provided with a crank arm connected with the manual operating shaft, each crank arm is provided with a first long hole, and the surface of the middle section of each pull rod is convexly provided with a transmission pin; the method is characterized in that: the surface of the transmission pin is respectively sleeved with a first roller and a second roller, the diameter of the first roller is equal to the width of the first long hole, and the first roller is sleeved in the first long hole of the corresponding crank arm; still be equipped with fixing support, fixing support be equipped with second gyro wheel complex second slot hole, the length of second slot hole is vertical, the diameter of second gyro wheel equals the width of second slot hole, the second gyro wheel cover is in fixing support's second slot hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121043816.4U CN214753533U (en) | 2021-05-17 | 2021-05-17 | Permanent magnet vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121043816.4U CN214753533U (en) | 2021-05-17 | 2021-05-17 | Permanent magnet vacuum circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214753533U true CN214753533U (en) | 2021-11-16 |
Family
ID=78622924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121043816.4U Active CN214753533U (en) | 2021-05-17 | 2021-05-17 | Permanent magnet vacuum circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214753533U (en) |
-
2021
- 2021-05-17 CN CN202121043816.4U patent/CN214753533U/en active Active
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