CN108010817B

CN108010817B - Self-locking device for safe plugging of plug-in circuit breaker

Info

Publication number: CN108010817B
Application number: CN201610949677.9A
Authority: CN
Inventors: 张勇; 全嘉青; 晏国云; 张江
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd
Priority date: 2016-11-02
Filing date: 2016-11-02
Publication date: 2020-02-21
Anticipated expiration: 2036-11-02
Also published as: CN108010817A

Abstract

The utility model provides a self-lock device is used in safe plug of bayonet circuit breaker which characterized in that: the device comprises a support (1), a connecting rod (2) is arranged in a slide hole (101) of the support (1), the lower end of the connecting rod (2) is linked with an ejector rod (3), the ejector rod (3) is horizontally arranged in a mounting hole (102) of the support (1), a spring (4) is sleeved on the ejector rod (3), the head end of the ejector rod (3) is linked with the lower end of the support (1), and the connecting rod (2) can push the ejector rod (3) to move horizontally and linearly in the up-and-down movement process in the slide hole (101). The invention changes the rotation motion of the traditional self-locking linkage mechanism into translation motion, improves the stability of the traditional self-locking linkage mechanism, increases the self-locking fulcrum of the self-locking mechanism and ensures that the risk of failure of the self-locking device can not occur even if the circuit breaker is obliquely inserted and pulled out.

Description

Self-locking device for safe plugging of plug-in circuit breaker

Technical Field

The invention belongs to the technical field of circuit breakers, and particularly relates to a self-locking device for safe plugging of a plug-in circuit breaker.

Background

The plug-in circuit breaker can separate or connect the circuit breaker and the socket in a plug-in mode, and convenience is brought to use and maintenance. From operator safety considerations, relevant legislation does not allow for extraction or insertion operations with the circuit breaker energized. The usual method is to ensure that the circuit breaker is in an open state when it is about to be plugged into or unplugged from the receptacle.

In order to meet the requirement that the circuit breaker cannot be inserted into or pulled out of the plug-in base in a closing state, the traditional solution has two types, namely the circuit breaker can be automatically released when being inserted into or pulled out of the plug-in base even in the closing state; the second is that the circuit breaker does not allow the insertion and extraction operations to be performed in the closing state, and the insertion and extraction operations can be performed only in the opening state. A safety plugging self-locking device of a plug-in molded case circuit breaker disclosed in chinese patent 201010263989.7, which comprises a breaker body, an operating mechanism is arranged on the breaker body, the operating mechanism comprises a connecting rod which can rotate around a rotating shaft, a limiting step is arranged in a base, a limiting part is rotatably arranged on a fixed shaft, the limiting piece is provided with a connecting arm and a limiting arm, the connecting arm is provided with a waist-shaped hole, a linkage shaft is arranged in the waist-shaped hole in a penetrating way, and is connected with one end of the connecting rod, the bracket is fixed at the bottom of the breaker body, the lock catch is rotatably arranged on the bracket, the spring is connected between the lock catch and the bracket, the self-locking device uses a self-locking point to prohibit the breaker from being inserted into or pulled out of the base when in a closing state, the structure only has an independent fulcrum, and the problem that the breaker is inserted into or pulled out of the breaker in a state of inclining to one end and failure risks exist cannot be reliably avoided.

Disclosure of Invention

The invention aims to overcome the technical defect that the conventional self-locking device is easy to self-lock and lose efficacy only at one fulcrum, and provides a self-locking device for safe plugging of a plug-in circuit breaker.

Technical scheme

In order to achieve the technical purpose, the invention designs a self-locking device for safe plugging of a plug-in circuit breaker, which is characterized in that: the device comprises a support, a connecting rod is arranged in a sliding hole of the support, the lower end of the connecting rod is linked with an ejector rod, the ejector rod is horizontally arranged in an installation hole of the support, a spring is sleeved on the ejector rod, the head end of the ejector rod is linked with the lower end of the support, and the connecting rod can push the ejector rod to horizontally and linearly move in the process of up-and-down movement in the sliding hole;

the support is fixedly arranged on the circuit breaker body, the upper end of the connecting rod is an inclined plane, a circuit breaker rotating shaft is in contact with the inclined plane, the circuit breaker rotating shaft can drive the connecting rod to move in the rotating process, an inclined chute is formed in the lower end of the connecting rod, the head end of the ejector rod is in arc surface contact with the inclined chute, the ejector rod can be driven to do horizontal linear motion through the inclined chute in the downward moving process of the connecting rod, one end of a spring sleeved on the ejector rod supports against the head of the ejector rod, the other end of the spring supports against a mounting plate on the support, a stop block group and a limit groove group are arranged in the vertical direction on the plug-in base corresponding to the tail end of the ejector rod, and.

Furthermore, a stroke limiting bulge is arranged on the connecting rod.

Further, the rotating shaft of the circuit breaker is in a cam shape.

Further, the ejector rod comprises a left ejector rod and a right ejector rod, and the spring comprises a left spring and a right spring;

the mounting plate comprises a left mounting plate and a right mounting plate, the stop block group comprises a first stop block and a second stop block, and the limiting groove group comprises a first limiting groove and a second limiting groove;

a stop block I, a stop block II, a limit groove I and a limit groove II are arranged on the plug-in base in the vertical direction at positions corresponding to the tail ends of the left ejector rod and the right ejector rod, a left spring is sleeved on the left ejector rod, a right spring is sleeved on the right ejector rod, one end of the left spring abuts against the head of the left ejector rod, the other end of the left spring abuts against a left mounting plate on the support, one end of the right spring abuts against the head of the right ejector rod, and the other end of the right spring abuts against a right;

the left ejector rod is arranged in at least two mounting holes which are concentric on the support in the horizontal direction, and the right ejector rod is arranged in at least two mounting holes which are concentric on the support in the horizontal direction.

Advantageous effects

According to the self-locking device for safe plugging of the plug-in circuit breaker, the traditional self-locking linkage mechanism is changed from rotary motion to translation, the traditional stability is improved, the stability of the traditional self-locking linkage mechanism is improved, the self-locking fulcrum of the self-locking mechanism is increased, and the risk of failure of the self-locking device is avoided even if the circuit breaker is plugged in and pulled out in an inclined mode.

Drawings

FIG. 1 is a schematic product diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating a normal insertion of a base in an opening state of a circuit breaker according to an embodiment of the present invention;

fig. 4 is a schematic diagram of the base forbidding insertion in a closing state of the circuit breaker in the embodiment of the invention;

FIG. 5 is a schematic diagram illustrating a base normally pulled out in an opening state of a circuit breaker according to an embodiment of the present invention;

fig. 6 is a schematic diagram illustrating that the base is prohibited from being pulled out in a closing state of the circuit breaker according to the embodiment of the invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

Examples

As shown in the attached figures 1 and 2, the self-locking device for the safe plugging of the plug-in circuit breaker comprises a support 1, a connecting rod 2 is arranged in a sliding hole 101 of the support 1, the lower end of the connecting rod 2 is linked with a push rod 3, the push rod 3 is horizontally arranged in a mounting hole 102 of the support 1, a spring 4 is sleeved on the push rod 3, the head end of the push rod 3 is linked with the lower end of the support 1, and the connecting rod 2 can push the push rod 3 to horizontally move linearly in the process of moving up and down in the sliding hole 101;

the support 1 is fixedly arranged on a circuit breaker body A, the upper end of the connecting rod 2 is an inclined surface 201, a circuit breaker rotating shaft 5 is in contact with the inclined surface 201, the circuit breaker rotating shaft 5 can drive the connecting rod 2 to move in the rotating process, an inclined chute 202 is arranged at the lower end of the connecting rod 2, the head end of the ejector rod 3 is in arc surface contact with the inclined chute 202, the connecting rod 2 can drive the ejector rod 3 to horizontally move through the inclined chute 202 in the downward moving process, one end of a spring 4 sleeved on the ejector rod 3 abuts against the head of the ejector rod 3, the other end of the spring abuts against a mounting plate 102a on the support 1, a stop block group B01 and a limit groove group B02 are arranged in the vertical direction on the plug-in base B and correspond to the tail end of the ejector rod 3, and the tail end of the ejector rod 3 can block the stop block.

The connecting rod 2 is provided with a stroke limit bulge 203.

The breaker rotating shaft 5 is cam-shaped.

Specifically, the top rod 3 comprises a left top rod 301 and a right top rod 302, the spring 4 comprises a left spring 401 and a right spring 402, the mounting plate 102a comprises a left mounting plate 102a01 and a right mounting plate 102a02, the stop block group B01 comprises a first stop block B1 and a second stop block B1 ', and the limit groove group B02 comprises a first limit groove B2 and a second limit groove B2';

a stop block I B1, a stop block II B1 ', a limit groove I B2 and a limit groove II B2' are vertically arranged on the plug-in base B corresponding to the tail ends of the left ejector rod 301 and the right ejector rod 302, a left spring 401 is sleeved on the left ejector rod 301, a right spring 402 is sleeved on the right ejector rod 302, one end of the left spring 401 props against the head of the left ejector rod 301, the other end of the left spring props against a left mounting plate 102a01 on the support 1, one end of the right spring 402 props against the head of the right ejector rod 302, and the other end of the right spring props against a right mounting plate 102a 02;

the left top rod 301 is arranged in at least two mounting holes 102 and 102 'which are concentric in the horizontal direction on the bracket 1, and the right top rod 302 is arranged in at least two mounting holes 103 and 103' which are concentric in the horizontal direction on the bracket 1.

As shown in fig. 3, in the open state of the circuit breaker, the rotating shaft 5 of the circuit breaker unlocks the upper inclined surface 201 of the connecting rod 2, so that the connecting rod 2 can move upwards freely, the push rods 3 on two sides of the lower end of the connecting rod 2 can move towards the middle under the action of the spring 4, the unlocking push rods 3 are matched with the first stop block, the first stop block B1 and the second stop block B1', and the circuit breaker can be inserted into the plug-in base B smoothly.

As shown in figure 4, in the closing state of the circuit breaker, a rotating shaft 5 of the circuit breaker rotates to act on an upper inclined surface 201 of a connecting rod 2, so that the connecting rod 2 moves downwards, an inclined chute 202 at the lower end of the connecting rod 2 enables ejector rods 3 at two ends to overcome the action of a spring 4 and move towards two ends, the ejector rods 3 can block a first stop block B1 and a second stop block B1', and the circuit breaker cannot be inserted into a plug-in base B.

As shown in figure 5, in the opening state of the circuit breaker, the rotating shaft 5 of the circuit breaker unlocks the upper inclined surface 201 of the connecting rod 2, so that the connecting rod 2 can move upwards freely, the ejector rods 3 on two sides of the lower end of the connecting rod 2 can move towards the middle under the action of the spring 4, the circuit breaker can be pulled out of the plug-in base B smoothly by matching the unlocking ejector rods 3 with the first limiting groove B2 and the second limiting groove B2'.

As shown in figure 6, in the closing state of the circuit breaker, the rotating shaft 5 of the circuit breaker rotates to act on the upper inclined surface 201 of the connecting rod 2, so that the connecting rod 2 moves downwards, the inclined sliding groove 202 at the lower end of the connecting rod 2 enables the ejector rods 3 at two ends to overcome the action of the spring 4 to move downwards, the ejector rods 3 extend into the first limiting groove B2 and the second limiting groove B2', and the circuit breaker cannot be inserted into or pulled out of the plug-in base B.

According to the self-locking device for safe plugging of the plug-in circuit breaker, the traditional self-locking linkage mechanism is changed from rotary motion to translation, the stability of the device is improved, the self-locking fulcrum of the self-locking mechanism is increased, and the risk that the self-locking device fails even if the circuit breaker is plugged in and pulled out in an inclined mode is avoided.

The structure, ratio, size and the like shown in the drawings of the present embodiment are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the limit conditions of the present invention, so that the present invention has no technical essence, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the function and the achievable purpose of the present invention. In addition, the terms such as "upper", "lower", "left", "right", "middle", "clockwise" and "counterclockwise" used in the present specification are for clarity of description only, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not limited by the technical contents of the substantial changes, but also considered to be the scope of the present invention.

Claims

1. The utility model provides a self-lock device is used in safe plug of bayonet circuit breaker which characterized in that: the device comprises a support (1), a connecting rod (2) is arranged in a sliding hole (101) of the support (1), the lower end of the connecting rod (2) is linked with a mandril (3), the mandril (3) is horizontally arranged in a mounting hole (102) of the support (1), a spring (4) is sleeved on the mandril (3), the head end of the mandril (3) is linked with the lower end of the support (1), and the connecting rod (2) can push the mandril (3) to horizontally move linearly in the up-and-down movement process in the sliding hole (101);

support (1) fixed dress is on circuit breaker body (A), connecting rod (2) upper end is inclined plane (201), circuit breaker pivot (5) contact with inclined plane (201), circuit breaker pivot (5) rotate in-process can drive connecting rod (2) motion, connecting rod (2) lower extreme is equipped with oblique spout (202), the head end and the contact of oblique spout (202) cambered surface of ejector pin (3), connecting rod (2) downstream in-process can drive ejector pin (3) horizontal linear motion through oblique spout (202), the spring (4) one end of suit supports the head of ejector pin (3) on ejector pin (3), the other end supports mounting panel (102a) on support (1), be equipped with on bayonet base (B) and ejector pin (3) tail end on corresponding position in vertical direction and stop the piece group (B01) and spacing bank of cells (B02), ejector pin (3) tail end can block stop the piece group (B01) or stretch into spacing bank of cells (B02) and make socket (B) in the horizontal motion process Can not be inserted or pulled out.

2. The self-locking device for the safe plugging and unplugging of the plug-in circuit breaker according to claim 1, characterized in that: and a stroke limiting bulge (203) is arranged on the connecting rod (2).

3. The self-locking device for the safe plugging and unplugging of the plug-in circuit breaker according to claim 1, characterized in that: the breaker rotating shaft (5) is cam-shaped.

4. The self-locking device for the safe plugging and unplugging of the plug-in circuit breaker according to claim 1, characterized in that: the ejector rod (3) comprises a left ejector rod (301) and a right ejector rod (302), the spring (4) comprises a left spring (401) and a right spring (402), the mounting plate (102a) comprises a left mounting plate (102a01) and a right mounting plate (102a02), the stop block group (B01) comprises a first stop block (B1) and a second stop block (B1 '), and the limit groove group (B02) comprises a first limit groove (B2) and a second limit groove (B2');

a first stop block (B1), a second stop block (B1 '), a first limit groove (B2) and a second limit groove (B2') are arranged on the plug-in base (B) in the vertical direction at positions corresponding to the tail ends of the left ejector rod (301) and the right ejector rod (302), a left spring (401) is sleeved on the left ejector rod (301), a right spring (402) is sleeved on the right ejector rod (302), one end of the left spring (401) abuts against the head of the left ejector rod (301), the other end of the left spring abuts against a left mounting plate (102a01) on the support (1), one end of the right spring (402) abuts against the head of the right ejector rod (302), and the other end of the right spring abuts against a right mounting plate (102a02) on the support (;

the left top rod (301) is arranged in at least two mounting holes (102,102 ') which are concentric on the bracket (1) in the horizontal direction, and the right top rod (302) is arranged in at least two mounting holes (103, 103') which are concentric on the bracket (1) in the horizontal direction.