CN201556875U

CN201556875U - Interlocking device of withdrawable type circuit breaker drawer lock

Info

Publication number: CN201556875U
Application number: CN2009202114463U
Authority: CN
Inventors: 毕建生
Original assignee: SHANGHAI JINGYI ELECTRICAL APPLIANCE CO Ltd; Jingyi Electrical Appliances Factory Co Ltd Shanghai
Current assignee: SHANGHAI JINGYI ELECTRICAL APPLIANCE CO Ltd; Jingyi Electrical Appliances Factory Co Ltd Shanghai
Priority date: 2009-10-28
Filing date: 2009-10-28
Publication date: 2010-08-18
Anticipated expiration: 2019-10-28

Abstract

The utility model provides an interlocking device of a withdrawable type circuit breaker drawer lock, which is mounted in a drawer seat of a circuit breaker and connected together with a swing in-out mechanism of a bottom frame of the drawer seat and comprises a support, a first lock, a second lock, a first cam, a second cam, a locking shaft, a stop ring and a return spring, wherein the first cam and the second cam have the identical structure, sides of both are provided with a concave groove, and the other sides thereof are provided with a cam surface. The interlocking device has simple and compact structure, has high locking safety and reliability of the swing in-out mechanism of the drawer seat of the circuit breaker, and can realize the locking of switching off, testing, and switching on any position of the withdrawable type circuit breaker.

Description

The interlock of drawout breaker drawer-lock

Technical field

The utility model relates to a kind of low-voltage circuit breaker, relates in particular to a kind of interlock of drawout breaker drawer-lock.

Background technology

The drawout chassis that drawout breaker commonly used comprises breaker body and is used to install circuit breaker is provided with on the drawout chassis underframe and shakes into shake-out machine structure.Breaker body has three latched positions promptly to disconnect, test and connect in drawout chassis.The subject matter that prior art exists is, be used for locking mechanism complex structure that three latched positions are locked, and the locked secure reliability is not high.

The utility model content

The purpose of this utility model exactly in order to address the above problem, provides the interlock of the high drawout breaker drawer-lock of a kind of compact conformation and security reliability.

In order to achieve the above object, the utility model has adopted following technical scheme: a kind of interlock of drawout breaker drawer-lock, and be installed in the drawout chassis of circuit breaker and shake into the drawout chassis underframe that the shake-out machine structure links together, it comprises:

Support is the board-like structural member of inverted T-shaped, is interval with two mounting holes on its surface plate, and its erect plate end is provided with the U-shaped draw-in groove;

First lock and second lock are located in two mounting holes of support respectively and are positioned on the support by a nut respectively, and first lock and second lock be edge mounting hole rotational accordingly respectively;

First cam and second cam, the upper end that is connected to first lock and second lock can be rotated with corresponding lock, and first cam is identical with second cam structure, and the one side is provided with a groove, and opposite side is provided with a cam surface;

Lock shaft is installed on the U-shaped draw-in groove of support, and an end of lock shaft is provided with the bulge loop that a groove that is used to insert on the cam forms locking, and the other end is provided with a circle draw-in groove;

Back-up ring is inlaid on the draw-in groove of lock shaft;

Return spring is arranged between the U-shaped draw-in groove of back-up ring and support.

Be provided with interior step in the U-shaped draw-in groove of described support, step forms the spring base of return spring in this.

The interlock of drawout breaker drawer-lock of the present utility model makes it compared with prior art owing to adopted above technical scheme, have following advantage and and characteristics:

1, cam design is simple in structure, and a part has a plurality of functions;

2, assembling and positioning is convenient, and locking position is safe and reliable;

3, reduced cost;

4, improved the security performance of drawout breaker.

Description of drawings

Fig. 1 is the perspective view of the interlock of the utility model drawout breaker drawer-lock;

Fig. 2 is the structural representation of the support in the utility model;

Fig. 3 is the structural representation of the cam in the utility model;

Fig. 4 is the structural representation of the lock shaft in the utility model;

Fig. 5 is the structural representation of the lock in the utility model;

Fig. 6, Fig. 7 are operation principle schematic diagrames of the present utility model.

Embodiment

Referring to Fig. 1, the interlock of the utility model drawout breaker drawer-lock, be installed in the drawout chassis of circuit breaker and shake into the drawout chassis underframe that the shake-out machine structure links together, comprise support 1, first lock, 2, second lock, 3, first cam 4, second cam 5, lock shaft 6, back-up ring 7 and return spring 8.

Cooperation is referring to Fig. 2, and support 1 is the board-like structural member of inverted T-shaped, is interval with two mounting holes 11 on its surface plate, and its erect plate end is provided with U-shaped draw-in groove 12.

Cooperation is referring to Fig. 5, and first lock, 2 and second lock 3 is located in two mounting holes of support respectively and is positioned on the support 1 by a nut 9 respectively, and first lock, 2 and second lock 3 can rotate and move along corresponding mounting hole respectively.

Cooperation is referring to Fig. 3, and first cam 4 is identical with second cam, 5 structures, and the one side is provided with a groove 41 (51), and opposite side is provided with a cam surface 42 (52).First cam 4 is connected the upper end of first lock 2 and can rotates with first lock 2, and second cam 5 is connected the upper end of second lock 3 and can rotates with second lock 3.

Cooperation is referring to Fig. 4, and lock shaft 6 is installed on the U-shaped draw-in groove 12 of support 1, and an end of lock shaft 6 is provided with the bulge loop 61 that a groove 41 that is used to insert on first cam forms locking, and the other end is provided with a circle draw-in groove 62.

Back-up ring 7 is inlaid on the draw-in groove 62 of lock shaft 6.

Return spring 8 is arranged between the U-shaped draw-in groove 12 of back-up ring 7 and support, is provided with interior step in the U-shaped draw-in groove 12 of support, and step forms the spring base of return spring 8 in this.

The operation principle of the interlock of the utility model drawout breaker drawer-lock can be described as follows in conjunction with Fig. 1, Fig. 6, Fig. 7:

First lock 2 is revolved and turn 90 degrees, make the groove 41 of first cam 4 aim at the bulge loop 61 of lock shafts 6, as shown in Figure 7.Then second lock 3 is revolved and turn 90 degrees, as shown in Figure 1, then lock shaft 6 is at the effect lower compression return spring 8 of the cam surface 51 of second cam 5, and makes the bulge loop 61 of lock shaft 6 enter the groove 41 of first cam 4, the groove 41 of first cam 4 blocks the bulge loop 61 of lock shaft 6, and this moment first, or else lock 2 can rotate.First lock 2 can not be opened, and promptly first lock 2 is pinned by second lock 3, as shown in Figure 1.

As opening first lock 2, must open second lock 3 earlier.Turn 90 degrees by second lock 3 is revolved, make the cam surface 51 of second cam 5 forward the side to, as shown in Figure 7, then lock shaft 6 moves to the second cam direction under the effect of return spring 8, the groove 41 that makes bulge loop 61 leave first cam 4 unlocks, first lock, 2 ability Unscrews, as shown in Figure 6.

Claims

1. the interlock of a drawout breaker drawer-lock is installed in the drawout chassis of circuit breaker and shakes into the drawout chassis underframe that the shake-out machine structure links together, and it is characterized in that comprising:

Back-up ring is inlaid on the draw-in groove of lock shaft;

2. the interlock of drawout breaker drawer-lock as claimed in claim 1 is characterized in that: be provided with interior step in the U-shaped draw-in groove of described support, step forms the spring base of return spring in this.