CN212625438U

CN212625438U - Circuit breaker toggle mechanism

Info

Publication number: CN212625438U
Application number: CN202021259449.7U
Authority: CN
Inventors: 班忠扬; 黎敏宁; 蓝思定
Original assignee: Guangdong Owent Electric Co ltd
Current assignee: Guangdong Owent Electric Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-02-26
Anticipated expiration: 2030-06-30

Abstract

The utility model provides a circuit breaker toggle mechanism, including circuit breaker shell, a rotating shaft, the gear, the rack, the slider, the driving lever, the stopper, push rod and casing, pivot and gear fixed connection, the one end and the circuit breaker shell of pivot rotate to be connected, the other end and driving lever fixed connection, one side fixed connection of slider and rack, be equipped with the spout among the circuit breaker shell, slider and spout sliding connection, wheel and rack toothing, the one end and the circuit breaker moving contact fixed connection of rack, the other end fixed connection of stopper and rack, be equipped with seal chamber among the casing, the cavity intussuseption is filled with paraffin, the top face of casing is equipped with the through-hole, the push rod pass the through-hole and with the casing between sealed sliding connection, one end of push rod is located within the seal chamber, the other end is located outside the casing. The utility model discloses can avoid the circuit breaker because of the accident that closed and lead to under the high temperature condition, its overall structure is simple, has fine practicality.

Description

Circuit breaker toggle mechanism

Technical Field

The utility model relates to a circuit breaker technical field particularly, relates to a circuit breaker toggle 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 the toggle 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 toggle mechanism can realize the on-off of the circuit breaker, but can not prevent the circuit breaker from being closed when the circuit breaker heats and warms up, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

In order to overcome the unable closed problem of prevention circuit breaker when the circuit breaker intensifies that generates heat of current circuit breaker toggle mechanism, the utility model provides a circuit breaker toggle mechanism, its concrete technical scheme as follows:

a circuit breaker toggle mechanism comprises a circuit breaker shell, a rotating shaft, a gear, a rack, a slider and a toggle lever, wherein the rotating shaft penetrates through the axis of the gear and is fixedly connected with the gear, one end of the rotating shaft is rotatably connected with the circuit breaker shell, the other end of the rotating shaft is fixedly connected with one end of the toggle lever, the slider is fixedly connected with one side of the rack, a chute is arranged in the circuit breaker shell, the slider is slidably connected with the chute, the gear is meshed with the rack, one end of the rack is fixedly connected with a circuit breaker moving contact, the circuit breaker toggle mechanism further comprises a limiting block, a push rod and a shell fixedly arranged on the circuit breaker shell, the limiting block is fixedly connected with the other end of the rack, a sealing cavity is arranged in the shell, paraffin is filled in the sealing cavity, a through hole is formed in the top end face of the shell, one end of the push rod is located in the sealing cavity, and the other end of the push rod is located outside the shell and located between the shell and the limiting block.

Optionally, the circuit breaker toggle mechanism further comprises an adjusting bolt, the adjusting bolt penetrates through the side wall of the housing and is in threaded connection with the side wall of the housing, one end of the adjusting bolt is located within the sealed cavity, and the other end of the adjusting bolt is located outside the housing.

Optionally, a sealing member is disposed between the push rod and the housing.

Optionally, the sealing element is an O-ring, a gasket, or an annular gland.

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: when the circuit breaker heats up, the length of the push rod between the limiting block and the shell can be lengthened, so that the limiting block and the rack are limited to move towards the direction of the static contact, and accidents caused by the fact that the circuit breaker is closed under the high-temperature condition are avoided. The circuit breaker poking machine adopts paraffin as a driving medium when the circuit breaker heats up, has a simple overall structure, is easy to install, has low cost and good practicability.

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 view of an overall structure of a circuit breaker toggle mechanism according to an embodiment of the present invention;

fig. 2 is a left side schematic view of a circuit breaker toggle mechanism according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a rack in an embodiment of the present invention;

fig. 4 is a schematic view of the whole structure of a circuit breaker toggle mechanism in the embodiment of the present invention.

Description of reference numerals:

1. a circuit breaker housing; 2. a rotating shaft; 3. a gear; 4. a rack; 5. a slider; 6. a deflector rod; 7. a chute; 8. a limiting block; 9. a push rod; 10. a housing; 11. sealing the cavity; 12. adjusting the bolt; 13. moving contact.

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 toggle mechanism, according to the following embodiment of the illustrated explanation of the attached drawing:

referring to fig. 1, 2 and 3, a circuit breaker toggle mechanism includes a circuit breaker housing 1, a rotating shaft 2, a gear 3, a rack 4, a slider 5 and a toggle lever 6, wherein the circuit breaker housing 1 is made of a hard insulating material, such as hard plastic. The utility model discloses a circuit breaker, including pivot 2, shift lever 6, gear 3, pivot 2, the one end of pivot 2 is connected with circuit breaker shell 1 rotation, the other end of pivot 2 and the one end fixed connection of shift lever 6, the other end of shift lever 6 is located outside circuit breaker shell 1. By turning the shift lever 6, the gear 3 can be rotated around the rotation shaft 2.

As shown in fig. 2 and 3, the sliding block 5 is fixedly connected to one side of the rack 4, a sliding groove 7 is provided in the circuit breaker housing 1, the sliding block 5 is slidably connected to the sliding groove 7, and the length of the sliding groove 7 is greater than that of the sliding block 5. The gear 3 is meshed with the rack 4, and one end of the rack 4 is fixedly connected with the moving contact 13 of the circuit breaker. The poking rod 6 is poked, the gear 3 rotates by taking the rotating shaft 2 as a center, and the rack 4 can be driven to move back and forth, so that the moving contact 13 and the static contact of the circuit breaker are closed and separated.

As shown in fig. 1, the circuit breaker toggle mechanism further includes a limiting block 8, a push rod 9 and a housing 10 fixedly mounted on the circuit breaker housing 1, the limiting block 8 is fixedly connected with the other end of the rack 4, a sealing cavity 11 is arranged in the housing 10, paraffin is filled in the sealing cavity 11, a through hole is formed in the top end face of the housing 10, the push rod 9 penetrates through the through hole and is in sealing sliding connection with the housing 10, one end of the push rod 9 is located in the sealing cavity 11, and the other end of the push rod 9 is located outside the housing 10 and is located between the housing 10 and the limiting block 8.

The paraffin wax has a volume expansion rate of 13.2% between 25 and 61 degrees and has a linear expansion characteristic. When the circuit breaker heats up, the paraffin in the shell 10 heats up and expands along with the circuit breaker, and the driving push rod 9 extends out of the sealed cavity 11. That is to say, when the circuit breaker generates heat and heats up, the length of the push rod 9 between the limiting block 8 and the shell 10 can be lengthened, and then the limiting block 8 and the rack 4 are limited to move towards the direction of the static contact, so that accidents (such as electric shock or fire) caused by the fact that the circuit breaker is closed under the high-temperature condition are avoided. The circuit breaker poking machine adopts paraffin as a driving medium when the circuit breaker heats up, has a simple overall structure, is easy to install, has low cost and good practicability.

In this uses neotype, seal chamber 11's volume, 3 sizes of gear, rack 4 and push rod 9 length in the casing 10 to and the distance between the other end of push rod 9 and stopper 8 under the normal condition, all can set for the adjustment according to actual conditions, no longer describe herein.

In addition, as shown in fig. 1 and fig. 4, one end of the limiting block 8 is fixedly connected to the other end of the rack 4, and the other end thereof may be located on one side of the rack 4 away from the gear 3, or on one side of the rack 4 close to the gear 3. Accordingly, the positions of the housing 10 and the push rod 9 are also changed. Fig. 1 and 4 show only one embodiment of the present invention.

In some embodiments, as shown in fig. 4, the circuit breaker toggle mechanism further includes an adjusting bolt 12, the adjusting bolt 12 penetrates through a side wall of the housing 10 and is in threaded connection with the side wall of the housing 10, one end of the adjusting bolt 12 is located inside the sealed cavity 11, and the other end of the adjusting bolt 12 is located outside the housing 10. Preferably, the adjusting bolt 12 is screwed with the bottom end side wall of the housing 10, and is hermetically connected with the bottom end side wall of the housing 10.

The volume of the sealed cavity 11 can be adjusted by adjusting the volume of one end of the adjusting bolt 12 positioned in the sealed cavity 11, so that the elongation of the push rod 9 during the temperature rise and expansion of the paraffin is adjusted. Therefore, the volume of the sealed cavity 11 can be finely adjusted according to actual conditions, and the application range of the circuit breaker toggle mechanism is widened.

In some embodiments, a seal is provided between the pushrod and the housing 10. The sealing element is an O-shaped sealing ring, a sealing gasket or an annular sealing sleeve. Due to the arrangement of the sealing piece, the sealing performance between the push rod 9 and the shell 10 can be improved, and paraffin in the sealing cavity 11 is prevented from leaking and seeping.

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: when the circuit breaker heats up, the length of the push rod between the limiting block and the shell can be lengthened, so that the limiting block and the rack are limited to move towards the direction of the static contact, and accidents caused by the fact that the circuit breaker is closed under the high-temperature condition are avoided. The circuit breaker poking machine adopts paraffin as a driving medium when the circuit breaker heats up, has a simple overall structure, is easy to install, has low cost and good practicability.

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

1. A circuit breaker toggle mechanism comprises a circuit breaker shell, a rotating shaft, a gear, a rack, a slider and a toggle lever, wherein the rotating shaft penetrates through the axis of the gear and is fixedly connected with the gear, one end of the rotating shaft is rotatably connected with the circuit breaker shell, the other end of the rotating shaft is fixedly connected with one end of the toggle lever, the slider is fixedly connected with one side of the rack, a chute is arranged in the circuit breaker shell, the slider is slidably connected with the chute, the gear is meshed with the rack, one end of the rack is fixedly connected with a circuit breaker moving contact, the circuit breaker toggle mechanism is characterized by further comprising a limiting block, a push rod and a shell fixedly arranged on the circuit breaker shell, one end of the limiting block is fixedly connected with the other end of the rack, the other end of the limiting block is positioned on one side of the rack far, the paraffin is filled in the sealing cavity, a through hole is formed in the top end face of the shell, the push rod penetrates through the through hole and is connected with the shell in a sealing and sliding mode, one end of the push rod is located inside the sealing cavity, and the other end of the push rod is located outside the shell and located between the shell and the limiting block.

2. The circuit breaker toggle mechanism according to claim 1, further comprising an adjusting bolt, wherein the adjusting bolt penetrates through and is in threaded connection with a side wall of the housing, one end of the adjusting bolt is located inside the sealed cavity, and the other end of the adjusting bolt is located outside the housing.

3. A circuit breaker toggle mechanism according to claim 2, wherein a seal is provided between the push rod and the housing.

4. A circuit breaker toggle mechanism according to claim 3, wherein the sealing means is an O-ring, a gasket or a ring seal.

5. A circuit breaker toggle mechanism according to claim 4, wherein the toggle is made of a hard insulating material, the hard insulating material being plastic or ceramic.

6. A circuit breaker toggle mechanism according to claim 5, wherein the other end of the toggle lever is sleeved with a rubber sleeve.