Accessory structure of circuit breaker

Abstract

Provided is an accessory structure of a circuit breaker. The circuit breaker accessory tripping mechanism mainly solves the problem that friction force between parts of a conventional circuit breaker accessory tripping mechanism is large, and tripping efficiency is affected. The device is characterized by further comprising a first rotating shaft which is arranged in the shell and used for being rotatably connected with the support; the second rotating shaft is arranged on the first rotating shaft and coaxially arranged with the first rotating shaft, the diameter of the second rotating shaft is smaller than that of the first rotating shaft, and the third rotating shaft is arranged on the second rotating shaft and coaxially arranged with the second rotating shaft, the diameter of the third rotating shaft is smaller than that of the second rotating shaft, and the third rotating shaft is used for being rotationally connected with the shifting rod; and gaps exist between the bracket and the lock catch as well as between the lock catch and the driving lever. According to the accessory structure of the circuit breaker provided by the utility model, the support, the lock catch and the driving lever are mounted through the shafts with different diameters, and the gaps are arranged between every two shafts, so that the contact area is reduced, the friction force is reduced, and the breaking effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of switchgear, specifically to an accessory structure for a circuit breaker. Background Technology

[0002] Electrical accessories are the most common type of electrical device in circuit breaker auxiliary units. They are generally divided into auxiliary electrical accessories and alarm electrical accessories. Auxiliary electrical accessories control the three states of the circuit breaker—open, closed, and tripping—by switching the contacts on and off. Alarm electrical accessories issue an alarm signal when a fault trips.

[0003] As shown in Chinese Patent Publication No. CN115295366A, the components of the tripping mechanism in current circuit breaker accessories are in contact with each other, resulting in significant friction during rotation and affecting tripping efficiency. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides an accessory structure for a circuit breaker, which mainly solves the problem that the friction between the components of the tripping mechanism of conventional circuit breaker accessories is too large, affecting the tripping efficiency.

[0005] The technical solution of this utility model is as follows:

[0006] An accessory structure for a circuit breaker includes a housing, within which a tripping mechanism is provided. The tripping mechanism includes a bracket, a trip latch, a locking latch, and a lever.

[0007] A first rotating shaft is located inside the housing and is used for rotatable connection of the bracket.

[0008] A second rotating shaft, disposed on the first rotating shaft, is coaxially arranged with the first rotating shaft and has a smaller diameter than the first rotating shaft, and is used for rotatable connection of the latch.

[0009] A third rotating shaft is disposed on the second rotating shaft, coaxially arranged with the second rotating shaft and having a smaller diameter than the second rotating shaft, for rotatable connection of the lever;

[0010] There are gaps between the bracket and the latch, and between the latch and the lever.

[0011] The bracket is provided with a recessed groove, and a fourth rotating shaft is provided on the recessed groove. The jump buckle is rotatably connected to the fourth rotating shaft.

[0012] At least a portion of the latch is located within the sinkhole.

[0013] A linkage rod is installed on the latch located outside the sinkhole.

[0014] The lever described in part extends outside the housing.

[0015] The housing is also provided with a movable contact piece, and the lever is provided with a linkage groove. Part of the movable contact piece is located in the linkage groove. When the lever rotates, it drives the movable contact piece to swing through the linkage groove.

[0016] The lever is provided with a clearance groove for the movement of the linkage rod.

[0017] A limiting block is provided on the housing opposite to the lever.

[0018] A platform is provided on the lever that extends out of the housing.

[0019] The beneficial effects of this utility model are: This utility model provides an accessory structure for a circuit breaker, which uses shafts of different diameters to install brackets, latches and levers, and sets gaps between each pair to reduce the contact area, reduce friction, and improve the breaking effect. Attached Figure Description

[0020] Figure 1 This is a perspective view of one embodiment of the present invention.

[0021] Figure 2 This is a partial explosion diagram of one embodiment of the present invention.

[0022] Figure 3 This is a cross-sectional schematic diagram of one embodiment of the present invention. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings. An accessory structure for a circuit breaker includes a housing 1, within which a tripping mechanism is provided. The tripping mechanism includes a bracket 2, a trip latch 3, a latch 4, and a lever 5. It also includes a first rotating shaft 61, disposed within the housing, for rotatably connecting the bracket; a second rotating shaft 62, disposed on the first rotating shaft, coaxial with the first rotating shaft and with a smaller diameter, for rotatably connecting the latch; and a third rotating shaft 63, disposed on the second rotating shaft, coaxial with the second rotating shaft and with a smaller diameter, for rotatably connecting the lever. Gaps 64 exist between the bracket and the latch, and between the latch and the lever. By using shafts of different diameters to install the bracket, latch, and lever, and by providing gaps between each pair, the contact area is reduced, friction is reduced, and the breaking effect is improved. Specifically, the height of the second rotating shaft can be greater than the height of the latch, thus ensuring a gap between the latch and the lever; the structure of the first rotating shaft is similar.

[0024] In this embodiment, as shown in the figure, the bracket is provided with a sink groove 21, and the sink groove is provided with a fourth rotating shaft 22. The jump buckle is rotatably connected to the fourth rotating shaft.

[0025] In this embodiment, as shown in the figure, at least part of the latch is located within the recess. This facilitates the installation of the lever and avoids interference.

[0026] In this embodiment, as shown in the figure, a linkage rod is installed on the latch outside the settling tank. When connected to the circuit breaker, the linkage rod connects with the circuit breaker's latch to transmit torque.

[0027] In this embodiment, as shown in the figure, part of the lever extends outside the housing.

[0028] In this embodiment, as shown in the figure, a movable contact piece 11 is also provided inside the housing, and a linkage groove 51 is provided on the lever. Part of the movable contact piece is disposed in the linkage groove. When the lever rotates, it drives the movable contact piece to swing through the linkage groove. The movable contact piece is connected to the stationary contact piece by its own elastic force. When breaking, the lever drives the movable contact piece to swing to achieve breaking.

[0029] In this embodiment, as shown in the figure, the lever is provided with a clearance groove 52 for the movement of the linkage rod. The overall structure is compact and relatively stable.

[0030] In this embodiment, as shown in the figure, a limiting block 13 is provided on the housing opposite to the lever. This serves to limit the movement and makes the structure more stable.

[0031] In this embodiment, as shown in the figure, a platform 55 is provided on the lever extending out of the housing.

[0032] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. An accessory structure of a circuit breaker, comprising a housing (1) in which a tripping mechanism is arranged, the tripping mechanism comprising a bracket (2), a trip lever (3), a lock lever (4) and a lever (5), characterized in that: Also include The first rotation axis (61) is arranged in the shell, and is used for rotatably connecting the support, The second rotation axis (62) is arranged on the first rotation axis, coaxially arranged with the first rotation axis and smaller in diameter than the first rotation axis, and is used for rotatably connecting the lock, The third rotation axis (63) is arranged on the second rotation axis, coaxially arranged with the second rotation axis and smaller in diameter than the second rotation axis, and is used for rotatably connecting the lever. The support and the lock, and the lock and the lever, all have gaps (64) therebetween.

2. An accessory structure for a circuit breaker according to claim 1, characterized in that: The support is provided with a sunken groove (21), and the sunken groove is provided with a fourth rotation axis (22), and the lock is rotatably connected with the fourth rotation axis.

3. An accessory structure for a circuit breaker according to claim 2, characterized in that: At least part of the lock is arranged in the sunken groove.

4. An accessory structure for a circuit breaker according to claim 3, characterized in that: The lock arranged outside the sunken groove is provided with a linkage lever.

5. An accessory structure for a circuit breaker according to claim 4, characterized in that: Part of the lever extends outside the shell.

6. An accessory structure for a circuit breaker according to claim 5, characterized in that: The shell is further provided with a movable contact (11), the lever is provided with a linkage groove (51), and part of the movable contact is arranged in the linkage groove, so that the lever is rotated to swing the movable contact through the linkage groove.

7. An accessory structure for a circuit breaker according to claim 6, characterized in that: The lever is provided with a clearance groove (52) for the movement of the linkage lever.

8. An accessory structure for a circuit breaker according to claim 7, characterized in that: The shell is provided with a limiting block (13) opposite to the lever.

9. An accessory structure for a circuit breaker according to claim 8, characterized in that: The lever extending outside the shell is provided with a platform (55).

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