CN113140431B

CN113140431B - Operating mechanism of miniature circuit breaker

Info

Publication number: CN113140431B
Application number: CN202110516262.3A
Authority: CN
Inventors: 杨峰
Original assignee: Zhejiang Zhishuo Electric Co ltd
Current assignee: Zhejiang Zhishuo Electric Co ltd
Priority date: 2021-05-12
Filing date: 2021-05-12
Publication date: 2022-10-04
Anticipated expiration: 2041-05-12
Also published as: CN113140431A

Abstract

The invention relates to an operating mechanism of a miniature circuit breaker.A contact support and a lock catch are respectively provided with a lower lock catch block and an upper lock catch block and are closed to form a lock catch carrying cavity, a connecting rod is inserted into the lock catch carrying cavity to realize linkage connection with a handle, and the connecting rod is propped against a lock catch carrying surface of the lower lock catch carrying cavity, so that a jump buckle is omitted, the structure is simple, and the assembly is convenient. When the switch is switched on, the connecting rod is driven by the handle to extrude the buckle surface so that the contact support rotates to realize the switch-on; when the brake is switched off, the tripper or the bimetal drives the lock catch to act, the upper buckle block of the lock catch moves upwards to be separated from the lower buckle block, the connecting rod is separated from the load buckle cavity, the connection between the handle and the contact support is released, the connecting rod returns to the brake switching-off position under the action of the spring, and the connecting rod is pulled into the load buckle cavity again to reset.

Description

Operating mechanism of miniature circuit breaker

Technical Field

The present invention relates to an operating mechanism of a miniature circuit breaker.

Background

The miniature circuit breaker is suitable for overload and short-circuit protection of lines with the rated voltage of 230/400V and the rated current of 63A and the rated voltage of 50/60Hz, and can also be used for infrequent operation and conversion of the lines under normal conditions. Miniature circuit breaker adopts operating device to realize breaking action, current operating device includes the handle usually, the moving contact support, the moving contact, the hasp, jump and detain, jump knot and hasp all articulate on the moving contact support, the handle passes through the U type connecting rod and is connected with the jump knot, make handle and jump knot linkage, cooperation through jumping between knot and the hasp realizes operating device's combined floodgate or divides absolutely, the operating device of this kind of structure is because the jump knot is very little, articulate and drop easily on the support, especially in assembling process, influence the production efficiency of product, and the jump knot also can drop when taking apart the circuit breaker and overhaul, the maintenance is inconvenient.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides the operating mechanism of the miniature circuit breaker, which has the advantages of simple structure, few accessories and convenience in assembly.

In order to achieve the purpose, the operating mechanism of the miniature circuit breaker comprises a moving contact, a contact support, a lock catch, a connecting rod and a handle, wherein the moving contact is hinged to the lower end of the contact support and can rotate around the contact support within a certain range, the lock catch is hinged to the contact support, the handle is connected with the contact support through the connecting rod, a lower buckle block is formed on the upper portion of the contact support, the inner side of the lock catch extends upwards to form an upper buckle block, the upper buckle block is arranged above the lower buckle block, a hollow buckle carrying cavity is defined by the centers of the lower buckle block and the upper buckle block, one end of the connecting rod is inserted into the buckle carrying cavity, a buckle carrying surface for carrying the thrust of the connecting rod is formed on the inner wall of the side surface of the lower buckle block, the connecting rod abuts against the buckle carrying surface, the upper buckle block is transversely arranged above the buckle carrying surface, and a lock catch spring is arranged between the contact support and the lock catch.

The invention has the advantages that the contact support and the lock catch are respectively provided with the lower buckle loading block and the upper buckle loading block, and are closed to form the buckle loading cavity, the connecting rod is inserted into the buckle loading cavity to realize linkage connection with the handle, the connecting rod is propped against the buckle loading surface of the lower buckle loading cavity, jump buckles are omitted, the structure is simple, and the assembly is convenient. When the switch is switched on, the connecting rod is driven by the handle to extrude the buckle surface so that the contact support rotates to realize the switch-on; when the brake is switched off, the tripper or the bimetal drives the lock catch to act, the upper buckle block of the lock catch moves upwards to be separated from the lower buckle block, the connecting rod is separated from the load buckle cavity, the connection between the handle and the contact support is released, the connecting rod returns to the brake switching-off position under the action of the spring, and the connecting rod is pulled into the load buckle cavity again to reset.

The invention is further arranged that the outer sides of the connecting positions of the upper and lower buckling blocks form an upper buckling surface and a lower buckling surface respectively, and the upper and lower buckling surfaces form a horn shape with a small inside and a large outside. The horn-shaped opening formed by the upper tripping surface and the lower tripping surface can guide the connecting rod to enter the buckle carrying cavity.

The invention is further arranged that a connecting rod groove is formed on the contact support above the lower buckle loading block, and the connecting rod passes through the top end of the buckle loading cavity and is limited in the connecting rod groove. The connecting rod groove can limit the motion range of the connecting rod and prevent the connecting rod from not returning to the buckle carrying cavity correctly when resetting.

The invention is further arranged that a limiting rod is formed on the contact support, a limiting long hole is formed on the lock catch corresponding to the limiting rod, the limiting rod penetrates through the limiting long hole, and the rotation amplitude of the lock catch relative to the contact support is limited in the range of the limiting long hole for the limiting rod to move. The rotation range of the lock catch on the contact support is limited by the matching of the limiting rod and the limiting hole, the opening distance between the upper buckle block and the lower buckle block is ensured, the connecting rod is prevented from being separated from the reset entrance and exit, and the connecting rod is prevented from being too large in displacement and incapable of being reset.

The invention is further provided that the lock catch spring is arranged at the outer side of the contact support and the lock catch, convex spring positioning points are formed on the contact support and the lock catch corresponding to the lock catch spring, and the lock catch spring is connected between the two spring positioning points. The hasp spring sets up and provides the restoring force in the outside for the hasp, convenient assembling moreover.

The invention is further arranged that the moving contact is hinged at the lower end of the contact support, the outer side of the upper end of the moving contact is blocked on the contact support, and the moving contact is connected with a moving contact spring which moves the moving contact at the lower end towards the inner side. The moving contact spring not only plays a role in releasing tension for the contact support, but also plays a role in pressurizing the moving contact.

The invention is further provided that the contact support is hinged with a pull rod, the pull rod is L-shaped, the upper end of the pull rod is hinged on the contact support, and the lower end of the contact support forms a convex pull rod point corresponding to the bending part of the pull rod. The pull rod is hinged on the contact support, and the assembly is convenient.

The invention is further arranged that the lower end of the contact support forms a hinged shaft hinged with the movable contact, the hinged shaft extends towards the lock catch, and the lock catch blocks the top end of the hinged shaft.

The invention is further set that the top of the upper end of the moving contact extends into the contact support.

The invention is further arranged that the moving contact spring is connected with the upper part of the moving contact, and the moving contact spring extends outwards.

The technical scheme optimizes the structure of the invention, and has the advantages of more reasonable design and more convenient assembly.

Drawings

FIG. 1 is an assembly schematic of an embodiment of the present invention.

Fig. 2 is an exploded view of an embodiment of the present invention.

Fig. 3 is a perspective view of an embodiment of the present invention.

Fig. 4 is a front view of the particular embodiment of the present invention with the handle removed.

Fig. 5 is a side view of an embodiment of the present invention with the handle removed.

Detailed Description

As shown in fig. 1-5, an embodiment of the present invention is an operating mechanism of a miniature circuit breaker, including a movable contact 5, a contact support 1, a latch 2, a connecting rod 3, and a handle 4, wherein the latch 2 is hinged on the contact support 1, the handle 4 is connected with the contact support 1 through the connecting rod 3, a lower latch 11 is formed at the upper portion of the contact support 1, an inner side of the latch 2 extends upward to form an upper latch 21, the upper latch 21 is disposed above the lower latch 11, centers of the lower latch 11 and the upper latch 21 enclose a hollow latch cavity 10, one end of the connecting rod 3 is inserted into the latch cavity 10, an inner wall of a side surface of the lower latch 11 forms a latch surface 12 for bearing thrust of the connecting rod, the connecting rod 3 abuts against the latch surface 12, the upper latch 21 is disposed above the latch surface 12, the upper latch 21 and the lower latch 11 form an upper latch surface 23 and a lower latch surface 13 respectively at outer sides of the connecting point, the upper latch 23 and the lower latch surface 13 form a horn shape with an inner and outer horn shape, the upper latch surface 23 and the lower latch surface 13 form a lower latch surface, the upper latch 14 and the upper latch 14 forms a limit rod 15 slot for limiting rod 15 corresponding to pass through the limit rod 15 in the limit rod support 15, the limit rod 15. A lock catch spring 24 is arranged between the contact support 1 and the lock catch 2, the lock catch spring 24 is arranged outside the contact support 1 and the lock catch 2, convex spring positioning points 25 are formed on the contact support 1 and the lock catch 2 corresponding to the lock catch spring 24, and the lock catch spring 24 is connected between the two spring positioning points 25.

Moving contact 5 articulates at contact support 1 lower extreme and can rotate at the certain limit around contact support 1, the upper end outside of moving contact 5 blocks on contact support 1, be connected with moving contact spring 6 with the moving contact trend inboard motion of lower extreme on moving contact 5, it has pull rod 7 to articulate on contact support 1, the pull rod is L shape, the upper end of pull rod 7 articulates on contact support 1, the department of bending that contact support 1 lower extreme corresponds pull rod 7 forms convex pull rod point 16, pull rod point 16 touches the department of bending of pull rod 7 and promotes pull rod 7 motion, the lower extreme of contact support 1 forms articulated shaft 17 of articulated moving contact 5, articulated shaft 17 extends towards hasp 2, hasp 2 blocks the top at articulated shaft 17, inside the upper end top of moving contact 5 stretches into contact support 1, moving contact spring 6 connects on the upper portion of moving contact 5, moving contact spring 6 outwards extends to be connected on the casing.

In the above embodiment, when switching on, the handle 4 drives the connecting rod 3 to press the button-carrying surface 12 to rotate the contact support 1 to realize switching on; when the brake is switched off, the release or bimetal drives the lock catch 2 to act, the upper buckle block 21 of the lock catch 2 moves upwards to be separated from the lower buckle block 11, the connecting rod 3 is separated from the inside of the buckle carrying cavity 10, the connection between the handle 4 and the contact support 1 is released, the connecting rod 3 returns to the brake switching-off position under the action of the spring, and the connecting rod 3 is pulled into the buckle carrying cavity 10 again by the handle 4 to reset.

For convenience of description, the inner sides of the contact holder 1 and the latch 2 in the above embodiments refer to the direction in which the contact holder and the latch face the handle, and the outer sides are the opposite.

The above examples are preferred embodiments of the present invention and other obvious modifications are within the scope of the present invention.

Claims

1. The utility model provides an operating device of miniature circuit breaker, operating device includes moving contact, contact carrier, hasp, connecting rod, handle, and the moving contact articulates at contact carrier lower extreme and can wind the contact carrier rotation in certain extent, and the hasp articulates on contact carrier, and the handle passes through the connecting rod and is connected its characterized in that with contact carrier: the upper portion of contact support forms down and detains the piece, and the inboard of hasp upwards extends to form and goes up to detain the piece, goes up to detain the piece setting and detain the piece top in the download, and the center that the piece was detained in the download encloses into hollow year with going up to detain the piece and detain the chamber, and connecting rod one end is inserted and is detained the intracavity in carrying, and the inner wall formation that the piece side was detained in the download carries the knot face that bears the connecting rod thrust, and the connecting rod top is detained on carrying the knot face, goes up to detain the piece horizontal in the top of carrying the knot face, is provided with the hasp spring between contact support and the hasp.

2. An operating mechanism of a small size circuit breaker according to claim 1, wherein: the upper tripping surface and the lower tripping surface form a horn shape with a small inside and a large outside.

3. The operating mechanism of a small size circuit breaker according to claim 1 or 2, wherein: and a connecting rod groove is formed on the contact support above the lower buckle loading block, and the connecting rod penetrates through the top end of the buckle loading cavity and is limited in the connecting rod groove.

4. The operating mechanism of a small size circuit breaker according to claim 1 or 2, wherein: the contact support is provided with a limiting rod, the lock catch is provided with a limiting long hole corresponding to the limiting rod, the limiting rod penetrates through the limiting long hole, and the rotation amplitude of the lock catch relative to the contact support is limited in the range where the limiting long hole is used for the limiting rod to move.

5. The operating mechanism of a small circuit breaker according to claim 1 or 2, wherein: the contact support and the lock catch form convex spring positioning points corresponding to the lock catch spring, and the lock catch spring is connected between the two spring positioning points.

6. The operating mechanism of a small size circuit breaker according to claim 1 or 2, wherein: the moving contact is hinged to the lower end of the contact support, the outer side of the upper end of the moving contact is blocked on the contact support, and a moving contact spring which enables a moving contact at the lower end to move towards the inner side is connected to the moving contact.

7. The operating mechanism of a small size circuit breaker according to claim 1 or 2, wherein: the contact support is hinged with a pull rod, the pull rod is L-shaped, the upper end of the pull rod is hinged to the contact support, and the lower end of the contact support forms a convex pull rod point corresponding to the bending position of the pull rod.

8. An operating mechanism of a small size circuit breaker according to claim 6, wherein: the lower end of the contact support forms an articulated shaft which is articulated with the moving contact, the articulated shaft extends towards the lock catch, and the lock catch blocks the top end of the articulated shaft.

9. The operating mechanism of a small size circuit breaker according to claim 8, wherein: the top of the upper end of the moving contact stretches into the contact support.

10. An operating mechanism of a small size circuit breaker according to claim 6, wherein: the moving contact spring is connected to the upper part of the moving contact and extends outwards.