Reclosing mechanism for circuit breaker
By setting a limit member in the reclosing mechanism of the circuit breaker, the limiting arms are prevented from rotating, and the problem of the three-phase turning arms is solved, ensuring the stability of the normal closing and closing process of the circuit breaker.
Patent Information
- Application Number
- CN202420924782.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The three-phase crimping arms in existing circuit breakers are likely to exceed the center of the spline shaft during the closing process, resulting in the roller and the mechanism of the spindle are not connected, and there is a phenomenon of refusal or abnormal closing.
A reclosing mechanism for circuit breakers is designed. By setting a limiting member inside the box, the limiting arm is prevented from rotating with the spline shaft, thereby avoiding the phenomenon of three-phase crimping arm being over-climbed.
It effectively avoids the problem that the center of the three-phase crimp arm is over the center of the spline shaft, ensures the normal closing of the mechanism, and solves the occurrence of abnormal phenomena during the closing process.
Smart Images
Figure CN222749421U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit breakers, in particular to a reclosing mechanism for circuit breakers. Background Art
[0002] When the ZN85 mechanism is closing, the mechanism cam hits the cam roller, causing the cam roller to move along the cam surface, thereby driving the three-hole crank arm and the two-hole crank arm, causing the spline main shaft to twist and drive the three-phase crank arm; however, in the prior art, the three-phase crank arm has an unrestricted rotation area, so it is easy to exceed the center of the spline shaft during rotation, so that the latch roller and the mechanism latch do not engage with each other, causing the mechanism to refuse to close, which in turn causes the mechanism to fail to close normally, or abnormal phenomena are prone to occur during the closing process. Utility Model Content
[0003] The purpose of the utility model is to provide a reclosing mechanism for a circuit breaker to solve the problems raised in the above background technology.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reclosing mechanism for a circuit breaker, comprising a box body and a driving mechanism installed on the box body; the driving mechanism comprises a spline shaft, one end of the spline shaft is provided with a three-phase crank arm, and a limit crank arm is provided on the inner side of the three-phase crank arm; a limit member is also provided inside the box body, and the limit member is used to prevent the limit crank arm from rotating with the spline shaft to prevent the three-phase crank arm from being over-centered.
[0005] As a preferred technical solution of the utility model: the limit member includes a support frame installed on the box body, and an adjustment member is provided on the support frame.
[0006] As a preferred technical solution of the utility model: the adjusting member is threadedly matched with the supporting frame, and the adjusting member is fixed on the supporting frame by tightening a positioning member.
[0007] By adopting the above technical solution, the beneficial effect of the utility model is: using the limiter to prevent the limit crank arm from rotating with the spline shaft, so as to avoid the phenomenon of the three-phase crank arm being over-centered, that is, the force center of the three-phase crank arm exceeds the center of the spline shaft, which causes abnormal phenomena and refusal to close when the mechanism is closed. Based on this, the utility model has a simple structure, and the three-phase crank arm is blocked by the limiter during the rotation process, so that the force center of the three-phase crank arm does not exceed the center of the spline shaft, so that the mechanism can be closed normally, and the occurrence of abnormal phenomena during the closing process is solved. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 This is a schematic diagram of the main structure of the utility model;
[0009] Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A;
[0010] Figure 3 This is a schematic diagram of the main structure of the driving mechanism of the utility model;
[0011] Figure 4 It is a schematic diagram of the end surface structure of the driving mechanism of the utility model.
[0012] In the figure: 1, box body; 2, driving mechanism; 20, spline shaft; 21, three-phase crank arm; 22, limit crank arm; 3, limit member; 30, support frame; 31, adjustment member; 32, positioning member. DETAILED DESCRIPTION
[0013] Embodiments of the present utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present utility model, and should not be construed as limitations on the present utility model. In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "upper surface", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.
[0014] See also Figure 1-4 The utility model provides an embodiment: a reclosing mechanism for a circuit breaker, comprising a box body 1 and a driving mechanism 2 installed on the box body 1; the driving mechanism 2 comprises a spline shaft 20, one end of the spline shaft 20 is provided with a three-phase crank arm 21, and a limit crank arm 22 is provided on the inner side of the three-phase crank arm 21; a limit member 3 is also provided inside the box body 1, and the limit member 3 is used to prevent the limit crank arm 22 from rotating with the spline shaft 20 to prevent the three-phase crank arm 21 from being over-centered.
[0015] Furthermore, since the limiting member 3 includes a support frame 30 installed on the box body 1 and an adjusting member 31 is provided on the support frame 30 , the height of the limiting member 3 can be adjusted by the adjusting member 31 to ensure the limiting ability of the limiting member 3 on the limiting arm 22 .
[0016] Specifically, the adjusting member 31 is threadedly matched with the supporting frame 30, so by rotating the adjusting member 31, the position of the adjusting member 31 on the supporting frame 30 can be adjusted. For example, when the adjusting member 31 is tightened, the height of the adjusting member 31 is lowered; when the adjusting member 31 is loosened, the height of the adjusting member 31 is raised.
[0017] At the same time, after the position adjustment of the adjusting member 31 is completed, the adjusting member 31 is fixed on the supporting frame 30 by tightening the positioning member 32. The adjusting member 31 is preferably a bolt, and the positioning member 32 is preferably a nut.
[0018] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.
Claims
1. A reclosing mechanism for a circuit breaker, characterized in that: It comprises a box body (1) and a driving mechanism (2) installed on the box body (1); The driving mechanism (2) comprises a spline shaft (20), one end of the spline shaft (20) is provided with a three-phase crank arm (21), and a limit crank arm (22) is provided on the inner side of the three-phase crank arm (21); A limiting member (3) is also provided inside the box body (1), and the limiting member (3) prevents the limiting crank arm (22) from rotating along with the spline shaft (20), thereby preventing the three-phase crank arm (21) from being over-centered.
2. A reclosing mechanism for a circuit breaker according to claim 1, characterized in that: The limiting member (3) comprises a support frame (30) mounted on the box body (1), and an adjusting member (31) is provided on the support frame (30).
3. A reclosing mechanism for a circuit breaker according to claim 2, characterized in that: The adjusting member (31) is threadably matched with the supporting frame (30), and the adjusting member (31) is fixed to the supporting frame (30) by tightening a provided positioning member (32).