CN206259302U - A kind of plug in circuit breaker safety insertion self-locking device - Google Patents

Abstract

A self-locking device for safe plug-in of a plug-in circuit breaker, characterized in that it includes a bracket (1), a connecting rod (2) is installed in a slide hole (101) of the bracket (1), and the connecting rod (2 ) is linked with the ejector rod (3), the ejector rod (3) is horizontally installed in the mounting hole (102) of the bracket (1), the ejector rod (3) is covered with a spring (4), and the ejector rod (3) head end is linked with the lower end of the bracket (1), and the connecting rod (2) can push the push rod (3) to move horizontally and linearly in the process of moving up and down in the slide hole (101). This utility model changes the traditional self-locking linkage mechanism from rotational movement to translational movement, which improves the stability of the traditional self-locking linkage mechanism, and at the same time increases the self-locking fulcrum of the self-locking mechanism to ensure that even when the circuit breaker is tilted, it will not Risk of self-locking device failure.

Description

A self-locking device for safe insertion and extraction of plug-in circuit breakers

technical field

The utility model belongs to the technical field of circuit breakers, and in particular relates to a self-locking device for safe insertion and extraction of plug-in circuit breakers.

Background technique

The plug-in circuit breaker can separate or connect the circuit breaker and the socket by plugging in and out, which brings convenience to use and maintenance. For operator safety, regulations do not allow unplugging or plugging in while the circuit breaker is energized. The usual approach is to make sure the breaker is off when it is about to be plugged into or about to be unplugged from an outlet.

In order to meet the requirement that the circuit breaker cannot be plugged into or pulled out of the plug-in base in the closed state, there are two traditional solutions. The first is to require the circuit breaker to automatically insert or pull out the plug-in base even in the closed state Tripping; the second is that the plug-in and pull-out operations are not allowed in the closed state of the circuit breaker, and the plug-in and pull-out operations can only be performed in the open state of the circuit breaker. Chinese patent 201010263989.7 discloses a plug-in molded case circuit breaker safety plug-in self-locking device, which includes a circuit breaker body, which is provided with an operating mechanism. The operating mechanism includes a connecting rod that can rotate around the rotating shaft. There is a limit step, the limit piece is rotatably installed on a fixed shaft, the limit piece has a connecting arm and a limit arm, the connecting arm is provided with a waist-shaped hole, and a linkage shaft is passed through In the waist-shaped hole and connected to one end of the connecting rod, the bracket is fixed on the bottom of the circuit breaker body, the lock is installed on the bracket for rotation, and the spring is connected between the lock and the bracket. The self-locking device uses a self-locking point in the It is forbidden to insert or pull out the circuit breaker from the base when the switch is closed. This structure has only one independent fulcrum, which cannot reliably prevent the circuit breaker from being inserted or pulled out of the circuit breaker when it is tilted to one end, and there is a risk of failure.

Utility model content

The purpose of this utility is to provide a self-locking device for safe insertion and removal of plug-in circuit breakers in view of the technical defect that the existing self-locking device has only one fulcrum and is prone to self-locking failure. For translational movement, the stability of the traditional self-locking linkage mechanism is improved, and at the same time, the fulcrum of the self-locking mechanism is increased to ensure that there will be no risk of self-locking device failure even when the circuit breaker is tilted.

Technical solutions

In order to achieve the above technical purpose, this utility design a self-locking device for plug-in circuit breaker safety plug-in, characterized in that: it includes a bracket, the connecting rod is installed in the sliding hole of the bracket, the lower end of the connecting rod and the push rod Linkage, the ejector rod is horizontally installed in the mounting hole of the bracket, the ejector rod is covered with a spring, the head of the ejector rod is linked with the lower end of the bracket, and the connecting rod can push the ejector rod to move horizontally and linearly during the up and down movement in the sliding hole.

The bracket is fixed on the body of the circuit breaker, the upper end of the connecting rod is a slope, the rotating shaft of the circuit breaker is in contact with the slope, and the connecting rod can be driven to move during the rotation of the rotating shaft of the circuit breaker. The head end of the connecting rod is in contact with the arc surface of the inclined chute, and the connecting rod can drive the ejector rod to move horizontally and linearly through the inclined chute during the downward movement. One end of the spring set on the ejector rod is against the head of the ejector rod, and the other end is against the bracket The mounting plate on the plug-in base is provided with a stop block and a limit groove in the vertical direction corresponding to the tail end of the ejector rod. The tail end of the ejector rod can block the stop block or extend into the limit during horizontal movement. The slot prevents insertion or extraction of the plug-in receptacle.

Further, the connecting rod is provided with a stroke limiting protrusion.

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

Further, the ejector rod includes a left ejector rod and a right ejector rod, and the plug-in base is provided with a stop block one and a stop block one and a stop block in the vertical direction corresponding to the tail ends of the left push rod and the right ejector rod. Position slot 1 and limit slot 1, the left spring is set on the left ejector rod and the right ejector rod, the right spring is installed on the right ejector rod, one end of the left spring is against the head of the left ejector rod, and the other end is against the left mounting rod on the bracket. plate, one end of the right spring is against the head of the right ejector rod, and the other end is against the right mounting plate on the bracket;

The left push rod is installed in at least two concentric mounting holes in the horizontal direction on the support, and the right push rod is mounted in at least two concentric mounting holes in the horizontal direction on the support.

Beneficial effect

The utility model provides a self-locking device for safe plug-in of a plug-in circuit breaker, which changes the traditional self-locking linkage mechanism from rotational motion to translational motion, improves the traditional stability and improves the stability of the traditional self-locking linkage mechanism, and at the same time The self-locking fulcrum of the self-locking mechanism is increased to ensure that there is no risk of failure of the self-locking device even when the circuit breaker is plugged in or out at an angle.

Description of drawings

Accompanying drawing 1 is the product schematic diagram of the present practical embodiment;

Accompanying drawing 2 is the structural representation of the utility embodiment;

Accompanying drawing 3 is a schematic diagram of normal insertion of the base in the open state of the circuit breaker in this practical embodiment;

Accompanying drawing 4 is a schematic diagram of prohibiting insertion of the base in the closed state of the circuit breaker in this practical embodiment;

Accompanying drawing 5 is a schematic diagram of the normal pull-out of the base under the open state of the circuit breaker in this practical embodiment;

Accompanying drawing 6 is a schematic diagram of prohibiting pulling out of the base when the circuit breaker is in the closed state of the practical embodiment.

detailed description

Below in conjunction with accompanying drawing and embodiment, the utility model is described in detail.

Example

As shown in Figures 1 and 2, a self-locking device for safe plug-in of a plug-in circuit breaker includes a bracket 1, and a connecting rod 2 is installed in the sliding hole 101 of the bracket 1. The lower end of the connecting rod 2 is connected to the top The rod 3 is linked, the ejector rod 3 is horizontally installed in the installation hole 102 of the bracket 1, the spring 4 is set on the ejector rod 3, the head end of the ejector rod 3 is linked with the lower end of the bracket 1, and the connecting rod 2 moves up and down in the sliding hole 101 Can push the push rod 3 to move horizontally and linearly.

The bracket 1 is fixedly mounted on the circuit breaker body A, the upper end of the connecting rod 2 is an inclined surface 201, the rotating shaft 5 of the circuit breaker is in contact with the inclined surface 201, and the rotating shaft 5 of the circuit breaker can drive the connecting rod 2 to move during the rotation process, and the connecting rod 2 The lower end is provided with an inclined chute 202, and the head end of the ejector rod 3 is in contact with the arc surface of the inclined chute 202. During the downward movement of the connecting rod 2, the ejector rod 3 can be driven to move horizontally and linearly through the inclined chute 202, and the ejector rod 3 is fitted One end of the spring 4 is against the head of the push rod 3, and the other end is against the mounting plate 102a on the bracket 1, and the plug-in base B is provided with a stop block B1 and a Limiting groove B2, the tail end of the push rod 3 can block the stop block B1 or extend into the limiting groove B2 during the horizontal movement so that the plug-in socket B cannot be inserted or pulled out.

The connecting rod 2 is provided with a stroke limiting protrusion 203 .

The circuit breaker rotating shaft 5 is cam-shaped.

Preferably, the ejector rod 3 includes a left ejector rod 301 and a right ejector rod 302, and stop blocks 1 and 302 are provided in the vertical direction on the plug-in base B corresponding to the tail ends of the left ejector rod 301 and the right ejector rod 302. B1 and stop block one B1' and limit groove one B2 and limit groove one B2', the left spring 4 is set on the left push rod 301 and the right push rod 302, the right spring 4' is set on the right push rod 302, and the left spring 4. One end is against the head of the left push rod 301, and the other end is against the left mounting plate 102a on the bracket 1. One end of the right spring 4' is against the head of the right push rod 302, and the other end is against the right mounting plate 102a on the bracket 1. Plate 102a'; the left push rod 301 is installed in at least two concentric installation holes 102, 102' in the horizontal direction on the bracket 1, and the right push rod 302 is installed in at least two concentric installation holes 103, 103' in the horizontal direction on the bracket 1.

As shown in Figure 3, when the circuit breaker is in the OFF state, the rotating shaft 5 of the circuit breaker unlocks the upper slope 201 of the connecting rod 2, so that the connecting rod 2 can move upward freely, and the push rods 3 on both sides of the lower end of the connecting rod 2 act on the spring 4 The bottom can move to the middle, and the cooperation between the ejector rod 3 and the stop block B1 is unlocked, and the circuit breaker can be inserted into the plug-in base B smoothly.

As shown in Figure 4, in the closed state of the circuit breaker: the rotating shaft 5 of the circuit breaker acts on the upper slope 201 of the connecting rod 2, causing the connecting rod 2 to move downward, and the inclined chute 202 at the lower end of the connecting rod 2 makes the top of the two ends The rod 3 moves toward both ends under the action of the spring 4, the push rod 3 can block the stop block B1, and the circuit breaker cannot be inserted into the plug-in base B.

As shown in Figure 5, when the circuit breaker is in the OFF state: the upper slope 201 of the connecting rod 2 is unlocked by the rotating shaft 5 of the circuit breaker, so that the connecting rod 2 can move upward freely, and the push rods 3 on both sides of the lower end of the connecting rod 2 act on the spring 4 The bottom can move to the middle, and the cooperation between the ejector rod 3 and the limit groove B2 is unlocked, and the circuit breaker can be pulled out of the plug-in base B smoothly.

As shown in Figure 6, when the circuit breaker is closed: the rotating shaft 5 of the circuit breaker acts on the upper inclined surface 201 of the connecting rod 2 to move the connecting rod 2 downward, and the inclined chute 202 at the lower end of the connecting rod 2 makes the top of the two ends Rod 3 overcomes the action of spring 4 and moves to both ends, and push rod 3 extends into the limit groove B2, and the circuit breaker cannot be inserted into or pulled out of plug-in base B.

The utility model provides a self-locking device for safe plug-in of a plug-in circuit breaker, which changes the traditional self-locking linkage mechanism from rotational motion to translational motion, improves the stability of the device, and increases the self-locking fulcrum of the self-locking mechanism to ensure Even when the circuit breaker is plugged and pulled out at an angle, there is no risk of failure of the self-locking device.

The structures, proportions, sizes, etc. shown in the accompanying drawings of this embodiment are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the limitations that can be implemented in this application Conditions, so it has no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of this utility, should still fall within the scope of this utility. The disclosed technical content must be within the scope covered. At the same time, terms such as "upper", "lower", "left", "right", "middle", "clockwise", and "counterclockwise" quoted in this specification are only for the convenience of description. It is not used to limit the applicable scope of the present application, and the change or adjustment of the relative relationship shall also be regarded as the applicable scope of the present application without substantive changes in the technical content.

Claims (5)

1. A self-locking device for safe plug-in of a plug-in circuit breaker, characterized in that it includes a bracket (1), and a connecting rod (2) is installed in the sliding hole (101) of the bracket (1), and the connecting rod The lower end of (2) is linked with the push rod (3), the push rod (3) is horizontally installed in the mounting hole (102) of the bracket (1), the push rod (3) is covered with a spring (4), and the push rod (3) ) head end is linked with the lower end of the bracket (1), and the connecting rod (2) can push the ejector rod (3) to move horizontally and linearly during the up and down movement in the sliding hole (101). 2. A self-locking device for safe insertion and removal of plug-in circuit breakers according to claim 1, characterized in that: the bracket (1) is fixed on the circuit breaker body (A), and the connecting rod (2 ) is an inclined surface (201), the circuit breaker shaft (5) is in contact with the inclined surface (201), and the circuit breaker shaft (5) can drive the movement of the connecting rod (2) during the rotation process, and the lower end of the connecting rod (2) is provided with an inclined slide Slot (202), the head end of the ejector rod (3) is in contact with the arc surface of the inclined chute (202), and the connecting rod (2) can drive the ejector rod (3) horizontally and straightly through the inclined chute (202) during its downward movement. Movement, one end of the spring (4) set on the push rod (3) is against the head of the push rod (3), the other end is against the mounting plate (102a) on the bracket (1), and the plug-in base (B) is connected with A stop block (B1) and a limit groove (B2) are provided in the vertical direction at the corresponding position of the tail end of the ejector rod (3), and the tail end of the ejector rod (3) can block the stop block (B1) during horizontal movement Or extend into the limit groove (B2) so that the plug-in socket (B) cannot be inserted or pulled out. 3. A self-locking device for safe insertion and removal of a plug-in circuit breaker according to claim 2, characterized in that: the connecting rod (2) is provided with a stroke limiting protrusion (203). 4. A self-locking device for safe insertion and removal of a plug-in circuit breaker according to claim 2, characterized in that: the circuit breaker rotating shaft (5) of the circuit breaker is in the shape of a cam. 5. A self-locking device for safe insertion and extraction of plug-in circuit breakers according to claim 2, characterized in that: the ejector rod (3) includes a left ejector rod (301) and a right ejector rod (302). On the base (B) corresponding to the tail end of the left push rod (301) and the right push rod (302), stop block one and (B1) and stop block one (B1') and stop block one (B1') and limit Position groove one (B2) and limit groove one (B2'), the left spring (4) is set on the left push rod (301) and the right push rod (302), and the right spring (4') is set on the right push rod (302). ), one end of the left spring (4) is against the head of the left ejector rod (301), the other end is against the left mounting plate (102a) on the bracket (1), and one end of the right spring (4') is against the right ejector rod ( 302), the other end against the right mounting plate (102a') on the bracket (1); The left ejector rod (301) is installed in at least two horizontally concentric mounting holes (102, 102') on the bracket 1, and the right ejector rod (302) is installed in at least two horizontally concentric mounting holes (103, 103') on the bracket 1. ').