Release for circuit breaker with box-type structure
By designing a release device with a box-type structure, it uses elastic connection and magnet attachment mechanism to achieve independent reset, which solves the problems of high operating power and safety hazards of traditional release devices, and provides a compact, stable and reliable reset solution.
Patent Information
- Application Number
- CN202422491239.5
- 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
The reset of the trip unit of a traditional circuit breaker needs to match the stroke of the operating mechanism, resulting in high operating force and safety hazards.
A cathode-structure trip unit is designed, using elastically connected reset components and magnet attachment mechanism to realize the autonomous reset of the trip rod and avoid matching the stroke of the circuit breaker operating mechanism.
It achieves compact structure, small space, good operating stability and high reset reliability, eliminates the problem of large operating force and improves safety hazards.
Smart Images
Figure CN223155952U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of low-voltage electrical appliance manufacturing, in particular to a release for a circuit breaker with a box structure. Background Technique
[0002] A circuit breaker is an electrical product that can automatically cut off the power supply for protection under overload and short-circuit conditions. With the development of the power system, the requirements for the functions and reliability of line protection are getting higher and higher. Intelligent circuit breakers are superior to traditional thermal-magnetic circuit breakers in terms of the diversity of protection functions and the reliability of protection due to the adoption of intelligent detection and control technologies.
[0003] The release is an important actuator for the protection of intelligent circuit breakers and usually adopts a magnetic latching structure. This structure requires the release to be reset before or during the closing of the circuit breaker. The traditional reset of the release is generally through the manual operating mechanism of the circuit breaker, which has disadvantages such as an increase in the operating force of the circuit breaker and a relatively high requirement for the stroke matching between the operating mechanism and the release. Summary of the Invention
[0004] The utility model mainly solves the deficiencies existing in the prior art and provides a release for a circuit breaker with a box structure, which has the characteristics of compact structure, small occupied space, good operation stability and high reset reliability. It solves the problem of large operating force of the circuit breaker. It realizes that the reset stroke does not need to be matched with the stroke of the operating mechanism of the circuit breaker, and improves the potential safety hazards caused by mutual interference.
[0005] The above technical problems of the utility model are mainly solved by the following technical solutions:
[0006] A release for a circuit breaker with a box structure includes a release housing. A release assembly extending out of the front end of the release housing is arranged inside the release housing. A reset assembly elastically press-connected to the release assembly is arranged on the upper part of the release housing. The release assembly includes a metal bracket. A release rod sleeved on the metal bracket and extending out of the front end of the release housing is arranged on the metal bracket. A coil sleeved on the release rod is arranged on the release rod. A magnet is arranged between the rear end of the coil and the metal bracket. A pressing plate nested and connected to the release rod is arranged at the front end of the coil. The coil and the magnet are positioned and fixed on the metal bracket through the pressing plate.
[0007] Preferably, the reset assembly includes a reset rod. A metal shaft inserted and fixed to the metal bracket is arranged on the reset rod. A reset torsion spring inserted to the metal shaft is arranged on the side of the reset rod.
[0008] When there is no limit to the position of the tail of the reset rod, under the action of the reset torsion spring, the head of the reset rod pushes the release lever, overcoming the pressure of the compression spring, so that it is attracted to the magnet to complete the reset. The suction force of the magnet on the release lever keeps the release lever in the reset position.
[0009] Preferably, a compression spring sleeved on the release lever is provided between the upper part of the reset rod and the pressure plate.
[0010] The head of the release lever passes through the compression spring and then passes through the cylindrical cavity in the middle of the coil. The disc of the release lever abuts against the head of the reset rod under the action of the compression spring. The reset rod is threaded together with the reset torsion spring and the metal bracket through a metal shaft. The head of the reset rod abuts against the disc of the release lever under the action of the reset torsion spring.
[0011] Preferably, a micro switch is provided between the lower part of the metal bracket and the rear end of the reset rod. When the reset rod moves to the reset position, the reset rod simultaneously abuts against the micro switch, causing the state of the micro switch to complete the switching.
[0012] Preferably, the release housing is provided with lugs and buckles.
[0013] The utility model can achieve the following effects:
[0014] The utility model provides a release for a circuit breaker in a box structure. Compared with the prior art, it has the characteristics of compact structure, small occupied space, good operation stability and high reset reliability. It solves the problem of large operating force of the circuit breaker. It realizes that the reset stroke does not need to be matched with the stroke of the operating mechanism of the circuit breaker, and improves the potential safety hazard caused by mutual interference. When the release rotates from the closing position to the opening position at the rotating shaft position of the circuit breaker, it is reset by its own reset spring. Another set of auxiliary contacts is installed in the release, and the state of the auxiliary contacts also changes simultaneously with the change of the rotating shaft position. Description of the Drawings
[0015] Figure 1 is a schematic structural diagram of the utility model.
[0016] Figure 2 is a cross-sectional structural view of the utility model.
[0017] In the figure: release housing 1, lug 2, buckle 3, reset assembly 4, release assembly 5, release lever 6, compression spring 7, pressure plate 8, coil 9, magnet 10, metal bracket 11, micro switch 12, metal shaft 13, reset rod 14, reset torsion spring 15. Detailed Embodiments
[0018] The technical solution of the present utility model will be further specifically described below through embodiments and in conjunction with the drawings.
[0019] Embodiment: AsFigure 1 and Figure 2 As shown in Figure 2 , a release for a circuit breaker with a cassette structure includes a release housing 1, on which there are lugs 2 and buckles 3. Inside the release housing 1, there is a release assembly 5 extending out of the front end of the release housing 1. The release assembly 5 includes a metal bracket 11, on which there is a release rod 6 sleeved with the metal bracket 11 and extending out of the front end of the release housing 1. On the release rod 6, there is a coil 9 sleeved with the release rod 6. Between the rear end of the coil 9 and the metal bracket 11, there is a magnet 10. At the front end of the coil 9, there is a pressure plate 8 nested and connected with the release rod 6. The coil 9 and the magnet 10 are positioned and fixed on the metal bracket 11 through the pressure plate 8. At the upper part of the release housing 1, there is a reset assembly 4 elastically press-connected with the release assembly 5. The reset assembly 4 includes a reset rod 14. Between the lower part of the metal bracket 11 and the rear end of the reset rod 14, there is a microswitch 12. On the reset rod 14, there is a metal shaft 13 inserted and fixed with the metal bracket 11. On the side of the reset rod 14, there is a reset torsion spring 15 inserted with the metal shaft 13. Between the upper part of the reset rod 14 and the pressure plate 8, there is a compression spring 7 sleeved with the release rod 6.
[0020] In summary, the release for the circuit breaker with the cassette structure has the characteristics of compact structure, small occupied space, good operation stability and high reset reliability. It solves the problem of large operating force of the circuit breaker. It realizes that the reset stroke does not need to match the stroke of the operating mechanism of the circuit breaker, and improves the potential safety hazards caused by mutual interference.
[0021] 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, in any aspect, 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 claimed rights.
[0022] In short, the above are only the 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 trip unit for a circuit breaker with a cassette structure, characterized in that: It includes a tripping housing (1), and a tripping component (5) extending out of the front end of the tripping housing (1) is arranged inside the tripping housing (1). A reset component (4) elastically press-connected to the tripping component (5) is arranged on the upper part of the tripping housing (1); the tripping component (5) includes a metal bracket (11), a tripping rod (6) sleeved on the metal bracket (11) and extending out of the front end of the tripping housing (1) is arranged on the metal bracket (11), a coil (9) sleeved on the tripping rod (6) is arranged on the tripping rod (6), a magnet (10) is arranged between the rear end of the coil (9) and the metal bracket (11), a pressing plate (8) nested and connected to the tripping rod (6) is arranged at the front end of the coil (9), and the coil (9) and the magnet (10) are positioned and fixed on the metal bracket (11) through the pressing plate (8).
2. The release for a circuit breaker with a cassette structure according to claim 1, characterized in that: The reset component (4) includes a reset rod (14), a metal shaft (13) inserted and fixed to the metal bracket (11) is arranged on the reset rod (14), and a reset torsion spring (15) inserted to the metal shaft (13) is arranged on the side of the reset rod (14).
3. The release for a circuit breaker with a cassette structure according to claim 2, characterized in that: A compression spring (7) sleeved on the tripping rod (6) is arranged between the upper part of the reset rod (14) and the pressing plate (8).
4. The release for a circuit breaker with a cassette structure according to claim 1, characterized in that: A microswitch (12) is arranged between the lower part of the metal bracket (11) and the rear end of the reset rod (14).
5. The release for a circuit breaker with a cassette structure according to claim 1, characterized in that: Lugs (2) and buckles (3) are arranged on the tripping housing (1).