Drawer type circuit breaker with three-section type stop structure
By introducing a three-stage stop structure limit guide groove into the circuit breaker, the displacement problem caused by vibration in the circuit breaker is solved, ensuring the reliable positioning and stable operation of the circuit breaker in the test position.
Patent Information
- Application Number
- CN202422491236.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-10-15
AI Technical Summary
When the existing low-voltage drawer circuit breaker is in the test position, due to the flat angle of the guide groove, the body displacement is easily caused by operating vibration, which affects the contact reliability of the control circuit.
The limiting element guide groove adopts a three-stage stop structure, including a stop groove in the middle of the guide groove. Through the sliding clamping of the limiting plate with the roller and the coordination of the transmission gear, the positioning limitation of the circuit breaker body is achieved.
The reliable positioning of the circuit breaker in the test position is achieved, the displacement caused by vibration is avoided, and the operation stability and reliability are improved.
Smart Images
Figure CN223156581U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of low-voltage electrical appliance manufacturing, and particularly relates to a drawer-type circuit breaker with a three-stage stop structure. Background Art
[0002] The low-voltage drawer-type circuit breaker is composed of a drawer base, a body base, a contact system, an arc extinguishing system, a mechanical operating system, an intelligent controller and other necessary auxiliary components. It can be used in a power distribution system to distribute electric energy, protect circuits and power supply equipment from the hazards of overload, undervoltage, short circuit, single-phase grounding and other faults. The drawer-type circuit breaker has a three-position function, and there are corresponding indications when the body is in the separated, test and connected positions.
[0003] Especially in the test position, the circuit breaker is in a state where the main circuit is disconnected and the secondary control circuit is still connected. At this time, the circuit breaker can be normally operated for closing and opening and automatic energy storage. Since the circuit breaker is in a suspended state in this position, the positioning of the body is mainly stopped by a guide groove that restricts its movement trajectory. Because the angle of the guide groove is relatively flat in the test position, the body will generate a certain displacement in the drawer base under the influence of the operating vibration force, resulting in incorrect indication of the circuit breaker. Seriously, it will cause the secondary control circuit not to conduct, and normal closing and opening operations cannot be performed. To solve this problem, the positioning of the body needs to be improved to meet the requirements.
[0004] When the guide groove of the limiting member in the prior art is a continuous and smooth arc, the circuit breaker body moves to the test position under the operation of the transmission mechanism. At this time, due to the rotation of the limiting member, the guide groove on it also moves to the corresponding position. At this time, the angle of the guide groove is relatively flat, and the body will generate displacement during the operation of the circuit breaker, thus causing the problem of non-contact of the control circuit. Summary of the Invention
[0005] The utility model mainly solves the deficiencies existing in the prior art, and provides a drawer-type circuit breaker with a three-stage stop structure, which has the characteristics of compact structure, good operation stability and high reliability. Through the positioning restriction of the stop structure of the guide groove of the limiting member, the movement of the circuit breaker body is restricted, and the vibration during operation will not cause the body to generate displacement, ensuring reliable positioning of the circuit breaker in the test position.
[0006] The above technical problems of the utility model are mainly solved by the following technical solutions:
[0007] A drawer-type circuit breaker with a three-stage stop structure includes a circuit breaker body. A stop block is provided on the upper part of the circuit breaker body. A drawer seat is provided at the front end of the circuit breaker body. A slide plate is provided between the side of the circuit breaker body and the side of the drawer seat. Rollers are provided on the slide plate. A transmission gear is provided at the lower part of the circuit breaker body. A limiting member that is snap-fitted and sleeved with the roller is provided between the transmission gear and the stop block. The limiting member includes a limiting plate. A guiding groove that is slidably clamped with the roller is provided on the limiting plate. A stop cut groove is provided in the middle section of the guiding groove.
[0008] Preferably, a driven tooth surface is provided between the end face of the limiting plate and the transmission gear. Assembly fixing holes that are inserted with a nut and a fixed shaft structure are provided on the limiting plate.
[0009] Preferably, the transmission gear is a sector structure of 80 degrees to 85 degrees, and the driven tooth surface is a sector structure of 90 degrees to 95 degrees.
[0010] Preferably, an adjustment drive seat is provided at the lower end of the circuit breaker body. A drive shaft is provided between the adjustment drive seat and the transmission gear.
[0011] Preferably, the guiding groove has a "C"-shaped structure.
[0012] The utility model can achieve the following effects:
[0013] The utility model provides a drawer-type circuit breaker with a three-stage stop structure. Compared with the prior art, it has the characteristics of compact structure, good operation stability and high reliability. Through the positioning restriction of the stop structure of the guiding groove of the limiting member, the movement of the circuit breaker body is restricted, and the vibration during operation will not cause the body to displace, ensuring the reliable positioning of the circuit breaker at the test position. Description of the Drawings
[0014] Figure 1 is a schematic structural diagram of the connection position of the utility model.
[0015] Figure 2 is a schematic structural diagram of the test position of the utility model.
[0016] Figure 3 is a schematic structural diagram of the limiting member in the utility model.
[0017] In the figure: circuit breaker body 1, stop block 2, drawer seat 3, roller 4, limiting member 5, slide plate 6, transmission gear 7, drive shaft 8, adjustment drive seat 9, limiting plate 10, assembly fixing hole 11, guiding groove 12, driven tooth surface 13, stop cut groove 14. Detailed Embodiment
[0018] The technical solution of the present utility model will be further specifically described below through embodiments in conjunction with the accompanying drawings.
[0019] Embodiment: As shown in Figure 1 , Figure 2 and Figure 3 , a drawer-type circuit breaker with a three-stage stop structure includes a circuit breaker body 1. A stop block 2 is provided above the circuit breaker body 1. A drawer seat 3 is provided at the front end of the circuit breaker body 1. A slide plate 6 is provided between the side of the circuit breaker body 1 and the side of the drawer seat 3. A roller 4 is provided on the slide plate 6. A transmission gear 7 is provided below the circuit breaker body 1. An adjustment drive seat 9 is provided at the lower end of the circuit breaker body 1. A drive shaft 8 is provided between the adjustment drive seat 9 and the transmission gear 7. A limiting member 5 that is snap-fitted and sleeved with the roller 4 is provided between the transmission gear 7 and the stop block 2. The limiting member 5 includes a limiting plate 10. A guiding groove 12 that is slidably clamped with the roller 4 is provided on the limiting plate 10. The guiding groove 12 is in a "C" - shaped structure. A stop cutting groove 14 is provided in the middle section of the guiding groove 12. A driven tooth surface 13 is provided between the end face of the limiting plate 10 and the transmission gear 7. An assembly fixing hole 11 that is inserted with a nut and a fixed shaft structure is provided on the limiting plate 10. The transmission gear 7 is a sector structure of 83 degrees, and the driven tooth surface 13 is a sector structure of 93 degrees.
[0020] A stop structure, namely the stop cutting groove 14, is added to the guiding groove 12 at the test position. When the circuit breaker body 1 is operated by driving the transmission gear 7 by the drive shaft 8, restricted by the positioning of the stop cutting groove 14, the movement of the circuit breaker body 1 is restricted, and the vibration during operation will not cause the body to displace, ensuring the reliable positioning of the circuit breaker at the test position and realizing the reliability of the operation at the test position.
[0021] In summary, the drawer-type circuit breaker with a three-stage stop structure has the characteristics of compact structure, good operation stability and high reliability. Through the positioning restriction of the stop structure of the guiding groove of the limiting member, the movement of the circuit breaker body is restricted, and the vibration during operation will not cause the body to displace, ensuring the reliable positioning of the circuit breaker at the test position.
[0022] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non - restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.
[0023] In summary, the above are only specific embodiments of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.
Claims
1. A drawer-type circuit breaker with a three-stage stop structure, comprising a circuit breaker body (1), characterized in that: A stopper (2) is provided at the upper part of the circuit breaker body (1). A drawer base (3) is provided at the front end of the circuit breaker body (1). A slide plate (6) is provided between the side of the circuit breaker body (1) and the side of the drawer base (3). Rollers (4) are provided on the slide plate (6). A transmission gear (7) is provided at the lower part of the circuit breaker body (1). A limiting member (5) which is in a clamped and limited sleeved connection with the roller (4) is provided between the transmission gear (7) and the stopper (2). The limiting member (5) includes a limiting plate (10). A guiding groove (12) which is in a sliding clamped connection with the roller (4) is provided on the limiting plate (10). A stop cut groove (14) is provided in the middle section of the guiding groove (12).
2. The drawer-type circuit breaker with a three-stage stop structure according to claim 1, characterized in that: A driven tooth surface (13) is provided between the end face of the limiting plate (10) and the transmission gear (7). Assembly fixing holes (11) which are inserted with a nut and a fixed shaft structure are provided on the limiting plate (10).
3. The drawer-type circuit breaker with a three-stage stop structure according to claim 2, characterized in that: The transmission gear (7) is a sector structure of 80 degrees to 85 degrees. The driven tooth surface (13) is a sector structure of 90 degrees to 95 degrees.
4. A drawer-type circuit breaker with a three-stage stop structure according to claim 1, characterized in that: An adjustment driving seat (9) is provided at the lower end of the circuit breaker body (1). A driving shaft (8) is provided between the adjustment driving seat (9) and the transmission gear (7).
5. A drawer-type circuit breaker with a three-stage stop structure according to claim 1, characterized in that: The guiding groove (12) is in a "C" - shaped structure.