CN216435816U

CN216435816U - Connecting rod action structure of circuit breaker

Info

Publication number: CN216435816U
Application number: CN202123085849.8U
Authority: CN
Inventors: 刘洪武; 徐翘楚; 谢心意
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-05-03
Anticipated expiration: 2031-12-09

Abstract

A connecting rod action structure of a circuit breaker belongs to the technical field of low-voltage electrical appliances. The circuit breaker includes curb plate and connecting rod action structure, connecting rod action structure is including jumping the knot lever, the hasp lever, go up the connecting rod, lower connecting rod and handle lever, jump the knot lever, hasp lever and handle lever all set up on the curb plate with rotating, the handle lever drives to jump the knot lever and rotates and hasp lever contact locking, go up connecting rod and lower connecting rod and pass through connecting axle pivotal connection, pass through spring coupling between connecting axle and the handle lever, go up the connecting rod and jump and detain the articulated connection of lever, characteristics are: the side plate is provided with a limiting piece, when the operating mechanism is located at a switch-on position or a tripping position, the upper connecting rod is in contact with the limiting piece, and in the process of tripping action of the operating mechanism, the upper connecting rod is kept in contact with the surface of the limiting piece and is not separated from the surface of the limiting piece. The advantages are that: dynamic impact caused by contact in the action process is effectively avoided, so that the structure of the whole operating mechanism is more reliable, and the service life of parts is prolonged.

Description

Connecting rod action structure of circuit breaker

Technical Field

The utility model belongs to the technical field of low-voltage apparatus, concretely relates to connecting rod action structure of circuit breaker.

Background

In a conventional low-voltage circuit breaker operating mechanism, an energy storage spring is generally used for acting two connecting rods to drive a rotating shaft to act, while in a conventional structure, two connecting rods both act freely when tripping acts, and a five-connecting-rod structure has two degrees of freedom, so that the action form of the five-connecting-rod structure cannot be determined before a final stable state is reached.

In view of the above-mentioned prior art, there is a need for a reasonable improvement of the link actuation structure of the prior circuit breaker. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a connecting rod action structure of circuit breaker, it can effectively avoid the dynamic impact that the action in-process recontacted and brought to make whole operating device's structure more reliable, the life of extension part.

The utility model discloses a task is accomplished like this, a connecting rod action structure of circuit breaker, the circuit breaker include curb plate and connecting rod action structure, connecting rod action structure including jumping and detaining lever, hasp lever, last connecting rod, lower connecting rod and handle lever, jump and detain lever, hasp lever and handle lever and all set up on the curb plate with rotating, the handle lever drives to jump and detain the lever and rotate and hasp lever contact locking, last connecting rod and lower connecting rod pass through connecting axle pivotal connection, connecting axle and handle lever between pass through spring coupling, last connecting rod and jump and detain the articulated connection of lever, characteristics are: the side plate is provided with a limiting piece, when the operating mechanism is located at a switch-on position or a tripping position, the upper connecting rod is in contact with the limiting piece, and in the process of tripping action of the operating mechanism, the upper connecting rod is kept in contact with the surface of the limiting piece and is not separated from the surface of the limiting piece.

In a specific embodiment of the present invention, the upper link is provided with a contact portion, and the contact portion contacts with the limiting member when the operating mechanism is located at the closing position or the releasing position.

In another specific embodiment of the present invention, the contact portion is a plane, an arc surface or an inclined surface.

In another specific embodiment of the present invention, the position-limiting member is a circular shaft or a semicircular shaft or a circular boss.

In another specific embodiment of the present invention, a main spring is provided between the connecting shaft and the handle lever, one end of the main spring is connected to the handle lever, and the other end of the main spring is connected to the connecting shaft.

In still another specific embodiment of the present invention, the handle lever is provided with a main spring hanging shaft, one end of the main spring is hung on the main spring hanging shaft, and the other end is hung on the connecting shaft.

In yet another specific embodiment of the present invention, the jump button lever is provided with a hinge portion, and the jump button lever is hinged to the upper connecting rod through the hinge portion.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has: the connecting rod action structure of the circuit breaker temporarily limits one degree of freedom through the contact of the upper connecting rod and the limiting part fixedly installed in the tripping process, so that the upper connecting rod in the tripping operation can only keep the action towards one direction in the action process, the upper connecting rod is blocked by the limiting part in the whole course of the other direction, the dynamic impact brought by the re-contact in the action process is avoided, and the structure of the whole operation mechanism is more reliable.

Drawings

Fig. 1 is a schematic diagram of a connecting rod actuating structure of a circuit breaker according to the present invention when the connecting rod actuating structure is located at a switching-on position.

Fig. 2 is a schematic diagram of the connecting rod actuating structure of the circuit breaker in the opening position.

Fig. 3 is a schematic diagram of the connecting rod actuating structure of the circuit breaker in the tripping position.

Fig. 4 is an explosion diagram of the link actuation structure of the circuit breaker of the present invention.

In the figure: 1. jump buckle lever, 11, hinge part; 2. a latch lever; 3. an upper link 31, a contact portion; 4. a lower connecting rod; 5. a handle lever 51, a main spring hanging shaft; 6. a connecting shaft; 7. a limiting member; 8. a main spring; 9. a rotating shaft; 10. a common pivot axis.

Detailed Description

The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments by the applicant is not intended to limit the technical solutions, and any changes made according to the present invention rather than the essential changes should be considered as the protection scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the position shown in fig. 1, and thus, should not be interpreted as a specific limitation to the technical solution provided by the present invention.

Referring to fig. 1, the present invention relates to a link actuating structure of a circuit breaker, which includes a housing, an operating mechanism, a handle, a shaft 9, and a contact system. The contact system comprises a moving contact and a fixed contact. When the breaker is switched on and off, the handle drives the operating mechanism to act, the operating mechanism drives the rotating shaft 9 to act after the operating mechanism acts, and the rotating shaft 9 drives the moving contact to realize contact or separation with the fixed contact, namely, the contact system acts.

Referring to fig. 1, the operating mechanism includes a side plate (not shown) and a link actuating structure, the link actuating structure includes a trip lever 1, a latch lever 2, a handle lever 5, and a limiting member 7, the limiting member 7 is fixed on the side plate, and the side plate is fixed on the circuit breaker housing. The jump buckle lever 1, the buckle lever 2 and the handle lever 5 are rotatably arranged on the side plates, and the handle lever 5 is provided with a main spring hanging shaft 51. The connecting rod action structure further comprises an upper connecting rod 3 and a lower connecting rod 4, and the upper connecting rod 3 and the lower connecting rod 4 are in pivot connection through a connecting shaft 6. The connecting shaft 6 is connected with the handle lever 5 through a spring. Specifically, a main spring 8 is arranged between the connecting shaft 6 and the handle lever 5, one end of the main spring 8 is hung on the main spring hanging shaft 51, and the other end is hung on the connecting shaft 6. A rotating shaft 9 which can drive the moving contact to act in the circuit breaker is connected with the lower connecting rod 4 through a common pivot shaft 10, and the rotation is realized through the movement of the lower connecting rod 4, so that the moving contact is driven by the rotating shaft 9 to be in contact with or separated from the fixed contact. The jump buckle lever 1 is provided with a hinge part 11, and the jump buckle lever 1 is hinged with the upper connecting rod 3 through the hinge part 11. The upper link 3 is provided with a contact portion 31, and the contact portion 31 contacts with the limiting member 7 when the operating mechanism is located at the switching-on position. The contact portion 31 is a plane, an arc surface or an inclined surface. The limiting piece 7 is a circular shaft or a semicircular shaft or a circular boss. In this embodiment, preferably, the contact portion 31 is a flat surface, and the stopper 7 is a circular shaft.

Referring to fig. 1 and 2, the handle lever 5 is pushed to make the main spring hanging shaft 51 contact with the trip lever 1 and drive the trip lever 1 to rotate and to be buckled with the lock lever 2 and locked, as shown in fig. 2, at this time, the operation mechanism is switched on, a moment in the switching-on direction is applied to the handle lever 5 to make the handle lever 5 move away from the lock lever 2, when a connecting line of hanging points at two ends of the main spring 8 passes through the central point position of the hinge part 11, the direction of the moment generated by the main spring 8 on the upper connecting rod 3 and the lower connecting rod 4 will change, so that the upper connecting rod 3 and the lower connecting rod 4 also move away from the lock lever 2 and drive the rotating shaft 9 to rotate, and the operation mechanism is in the switching-on position at this time, as shown in fig. 1, until the lower connecting rod 4 stops moving after contacting with the trip lever 1 to complete the switching-on operation. At this time, the contact portion 31 of the upper link 3 contacts the stopper 7.

Referring to fig. 2, when the operating mechanism is at the closing position (as shown in fig. 1), the operating mechanism is opened, a moment in the opening direction is applied to the handle lever 5, so that the handle lever 5 moves toward the latch lever 2, when a connecting line of hanging points at two ends of the main spring 8 passes through the central point of the hinge portion 11, the direction of the moment generated by the main spring 8 on the upper connecting rod 3 and the lower connecting rod 4 will change, so that the upper connecting rod 3 and the lower connecting rod 4 also move toward the latch lever 2 and drive the rotating shaft 9 to rotate, until the rotating shaft 9 is in place, the opening operation is completed, and the operating mechanism is at the opening position as shown in fig. 2.

When referring to fig. 3, in a closing state of the operating mechanism, as shown in fig. 1, a tripping operation can be performed, the latch lever 2 is operated to perform an unlocking operation, the latch lever 2 is opened to a certain angle in a direction away from the trip lever 1, the trip lever 1 is not restrained any more, and will be opened upward under the pulling force of the main spring 8, at this time, the upper link 3 and the lower link 4 follow the trip lever 1 to move, after starting, the upper link 3 contacts with the limiting member 7, the contact portion 31 slides on the circular surface of the limiting member 7, because the limiting member 7 is fixedly installed, the movement of the upper link 3 in one direction is always restrained in the whole tripping operation process, so that the upper link 3 can only perform a movement with only one degree of freedom according to the contact trajectory of the contact portion 31 and the limiting member 7, and finally stops after tripping, referring to fig. 3, at this time, the contact portion 31 slides to the end, and finally, can be kept in contact with the stopper 7 without being separated.

When the trip position is reached, the trip lever 1 is reset and locked again only by resetting the latch lever 2, and the handle lever 5 is moved towards the latch lever 2 by applying a moment in the opening direction to the handle lever 5, and the main spring hanging shaft 51 pushes the trip lever 1 to rotate downwards. Meanwhile, the upper connecting rod 3 and the lower connecting rod 4 move along with the tripping lever 1, and finally all parts return to the brake separating position to finish the re-buckling action.

In the manufacturing process, due to errors in machining and assembling of parts, when the operating mechanism is located at the closing position or the releasing position, the contact portion 31 may not be in close contact with the limiting member 7, and a slight gap, such as 0.5 mm, may be formed between the two, which also falls within the scope of the claims of this patent. When the tripping action is just started, the gap between the two parts disappears rapidly and the contact occurs immediately, and the effects of ensuring the contact in the whole action process and finishing the restraint effect can be achieved.

Claims

1. The utility model provides a connecting rod action structure of circuit breaker, the circuit breaker include curb plate and connecting rod action structure, connecting rod action structure including jump buckle lever (1), hasp lever (2), go up connecting rod (3), lower connecting rod (4) and handle lever (5), jump buckle lever (1), hasp lever (2) and handle lever (5) all set up on the curb plate with rotating, handle lever (5) drive jump buckle lever (1) rotate with hasp lever (2) contact locking, last connecting rod (3) and lower connecting rod (4) pass through connecting axle (6) pivotal connection, connecting axle (6) and handle lever (5) between through spring coupling, last connecting rod (3) and jump buckle lever (1) articulated connection, its characterized in that: the side plate is provided with a limiting piece (7), when the operating mechanism is located at a switching-on position or a tripping position, the upper connecting rod (3) is in contact with the limiting piece (7), and in the process of tripping action of the operating mechanism, the upper connecting rod (3) is kept in contact with the surface of the limiting piece (7) and is not separated from the surface.

2. The link actuating structure of a circuit breaker according to claim 1, wherein: the upper connecting rod (3) is provided with a contact part (31), and the contact part (31) is in contact with the limiting part (7) when the operating mechanism is located at a switching-on position or a tripping position.

3. The link actuating structure of a circuit breaker according to claim 2, wherein: the contact part (31) is a plane, an arc surface or an inclined surface.

4. The link actuating structure of a circuit breaker according to claim 1, wherein: the limiting piece (7) is a circular shaft or a semicircular shaft or a circular boss.

5. The link actuating structure of a circuit breaker according to claim 1, wherein: a main spring (8) is arranged between the connecting shaft (6) and the handle lever (5), one end of the main spring (8) is hung on the handle lever (5), and the other end of the main spring is hung on the connecting shaft (6).

6. The link actuating structure of a circuit breaker according to claim 5, wherein: the handle lever (5) is provided with a main spring hanging shaft (51), one end of the main spring (8) is hung on the main spring hanging shaft (51), and the other end of the main spring (8) is hung on the connecting shaft (6).

7. The link actuating structure of a circuit breaker according to claim 1, wherein: the jump buckle lever (1) is provided with a hinge part (11), and the jump buckle lever (1) is hinged with the upper connecting rod (3) through the hinge part (11).