Tripping mechanism for molded case circuit breaker
By designing a circuit breaker trip mechanism including a bracket, solenoid coil and push rod, the multi-function problem of circuit breaker loading in old-sized boxes is solved, and the size optimization and automatic tripping of circuit breaker are realized, and the existing solution is solved. The problem of excessive space occupied by circuit breakers during technical periods.
Patent Information
- Application Number
- CN202422936511.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing circuit breakers cannot meet the multiple requirements of size and function at the same time, resulting in too much space when loading multi-function circuit breakers in old-size boxes, and it is impossible to achieve compatibility between limit size and limit functions.
A trip mechanism for plastic shell circuit breaker is designed, including a bracket, an electromagnetic coil, a moving iron core and a push rod. The moving iron core pushes the rod through the energization of the electromagnetic coil, combining the adsorbent, guide part, elastic member and guide slot, realizes automatic tripping function, optimizes the structure of the tripping component to reduce the size.
By making full use of the longitudinal space, reducing the lateral space occupation, realizing the automatic tripping function, reducing the overall size of the circuit breaker, and reducing the space occupation, it is suitable for automatic tripping in emergencies.
Smart Images
Figure CN222281898U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrical equipment, in particular to a tripping mechanism for a molded case circuit breaker. Background Art
[0002] In order to ensure that the replacement and upgrade of the circuit breaker does not affect the use of the box that matches it, the height of the circuit breaker needs to be less than 105mm so that it can be installed in the original box. At the same time, the length and width of the circuit breaker also need to be as small as possible to save the installation box space and realize the loading of multifunctional circuit breakers in the old size box. This requires the reasonable arrangement of different functional modules in the three-phase four-wire residual current protection circuit breaker of the automatic opening and closing device, especially the electronic controller, so that the limit size meets the limit function. The existing circuit breaker cannot meet the multiple requirements of size and function at the same time. Therefore, it is necessary to optimize the size of each component inside the circuit breaker in order to reduce the overall space occupied by the circuit breaker. Utility Model Content
[0003] The purpose of the utility model is to provide a tripping mechanism for a molded case 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 tripping mechanism for a molded case circuit breaker, comprising a tripping member, wherein the tripping member comprises a bracket, and an electromagnetic coil is arranged in the bracket, and a moving iron core is arranged in the electromagnetic coil, and the moving iron core is connected to a push rod.
[0005] As a preferred technical solution of the utility model: an adsorption member is further provided inside the bracket, and the moving iron core is adsorbed on the adsorption member through the adsorption member when the electromagnetic coil is not energized.
[0006] As a preferred technical solution of the utility model: a guide portion is further provided on the bracket, and the push rod is sleeved outside the guide portion through a sleeve.
[0007] As a preferred technical solution of the utility model: an elastic member is sleeved on the outside of the sleeve, and the elastic member forces the push rod to move outward.
[0008] As a preferred technical solution of the utility model: a guide rod is also provided on the bracket, and the guide rod is adaptively connected to the guide groove provided on the push rod.
[0009] As a preferred technical solution of the utility model: the elastic member is a coil spring, and the adsorption member is a permanent magnet.
[0010] By adopting the above technical solution, the beneficial effect of the utility model is that since the push rod is parallel to the central axis of the electromagnetic coil, the device can make full use of the longitudinal space and reduce the lateral space occupation, so that the device can complete the automatic tripping function in an emergency situation, and the size of the tripping mechanism can also be reduced. Based on this, by optimizing the structure of the tripping assembly, it is beneficial to reduce the size of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is an exploded schematic diagram of the main structure of the utility model;
[0012] Figure 2 This is a schematic diagram of the main structure of the bottom shell of the utility model;
[0013] Figure 3 It is a schematic diagram of the partial structure of the shell cover of the utility model after being decomposed;
[0014] Figure 4 It is a schematic diagram of the main structure of the opening and closing operation component of the utility model;
[0015] Figure 5 It is a schematic diagram of the exploded structure of the opening and closing operation component of the utility model;
[0016] Figure 6 This is a schematic diagram of the main structure of the transformer assembly of the utility model;
[0017] Figure 7 It is a schematic diagram of one side of the exploded structure of the transformer assembly of the utility model;
[0018] Figure 8 It is a schematic diagram of the other side of the exploded structure of the mutual inductor assembly of the utility model;
[0019] Fig. 9 It is a schematic diagram of the exploded structure of the release member of the utility model;
[0020] Fig.10 It is a schematic diagram of the main structure of the circuit one-way control component;
[0021] Fig.11 This is a schematic diagram of the structure of one side of the circuit one-way control component.
[0022] In the figure: 1, bottom shell; 2, shell cover; 20, shell; 21, electrical cavity; 22, indicator plate; 23, cavity cover; 24, fastener; 25, connection part; 3, mutual inductor assembly; 30, first installation box; 31, first accommodating cavity; 32, mutual inductor; 33, second installation box; 34, identification frame; 35, second accommodating cavity; 36, release member; 37, circuit board; 38, power outlet; 39, moving iron core; 310, adsorption member; 311, electromagnetic coil; 312. Guide part; 313. Elastic member; 314. Bushing; 315. Guide groove; 316. Push rod; 317. Guide rod; 318. Bracket; 4. Opening and closing operation assembly; 40. First side plate; 41. Second side plate; 42. Drawbar; 43. Transmission frame; 44. Toggle frame; 45. Fixed foot; 46. Arc groove; 47. Handle; 5. Separation rod; 6. First installation cavity; 7. Second installation cavity; 8. Third installation cavity; 9. Arc extinguishing chamber. DETAILED DESCRIPTION
[0023] 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.
[0024] See also Figure 1-11 The utility model provides an embodiment: a tripping mechanism for a molded case circuit breaker, comprising a bottom shell 1, a plurality of first mounting cavities 6 and second mounting cavities 7 having the same structure and being independent of each other are provided on the bottom shell 1; an arc extinguishing chamber 9 is provided in the first mounting cavity 6, a separation rod 5 is provided in the second mounting cavity 7, and a closing and opening operation component 4 sleeved on the outside of the separation rod 5 is also provided in the second mounting cavity 7; a third mounting cavity 8 is also provided below the bottom shell 1, and a mutual inductor component 3 is installed in the third mounting cavity 8; a shell cover 2 is also provided on the bottom shell 1, and the shell cover 2 comprises a shell 20, an indicator plate 22 is provided above the shell 20, and an electrical cavity 21 is also provided below the shell 20; a cavity cover 23 is also provided on the electrical cavity 21, and is connected to a connecting portion 25 provided on the shell 20 through a fastener 24 provided, so that the cavity cover 23 covers the electrical cavity 21.
[0025] In summary, since a plurality of first installation cavities 6 and second installation cavities 7 with the same structure are arranged inside the bottom shell 1, the devices for controlling the on and off of the circuits can be respectively installed in the corresponding cavities, so that when any circuit is disconnected, the other circuits can work normally without being affected. At the same time, by disconnecting the corresponding circuit during detection, the circuit with problems can be detected and repaired without affecting other circuits.
[0026] In particular, since the transformer assembly 3 is installed in the third installation cavity 8 and then other control modules are placed in the electrical cavity 21, the device has a high degree of integration and reduces the space occupied by the device. Therefore, the device can be directly installed in the original electrical control box to facilitate the replacement and upgrade of new and old products.
[0027] In addition, the cavity cover 23 can be opened and closed, so it is convenient for installing the electric control module and replacing and repairing the electric control module. Based on this, the structure of the bottom shell 1 of the device is optimized and the space of the shell cover 2 is fully utilized, so that the external space occupied by the device is basically consistent with the structural size of the old circuit breaker, which is convenient for the replacement of new and old products.
[0028] In order to optimize the size of the opening and closing operation component 4, the opening and closing operation component 4 includes a first side plate 40 located on one side of the separation rod 5 and a second side plate 41 located on the other side of the separation rod 5, and a toggle frame 44 is rotatably mounted on the first side plate 40 and the second side plate 41, and the toggle frame 44 is linked with a traction rod 42 through a transmission frame 43. Based on this, the two side plates are inserted on the outside of the separation rod 5, so that the opening and closing operation component 4 can be located above the separation rod 5, so that the spatial layout between the opening and closing operation component 4 and the separation rod 5 is optimized.
[0029] Meanwhile, fixing feet 45 are provided on the facing surfaces of the first side plate 40 and the second side plate 41 , thereby further reducing the space occupied by the two side plates in the lateral direction of the bottom shell 1 , thereby facilitating the space occupied by the opening and closing operating assembly 4 .
[0030] In addition, since the first side plate 40 and the second side plate 41 are both provided with the arc groove 46 for facilitating the rotation of the release rod 5, the arc groove 46 can be used to provide sufficient space for the rotation of the release rod 5, thereby reducing the resistance of the release rod 5 during rotation.
[0031] Furthermore, since a handle 47 is also provided on the toggle frame 44, the handle 47 can be used to prompt the opening and closing operating assembly 4 to complete the opening action or the closing action.
[0032] On the basis of the above scheme, since the transformer assembly 3 includes a first installation box 30 and a second installation box 33, and the first installation box 30 is also provided with a first accommodating cavity 31 for installing the transformer 32, and the first installation box 30 is also provided with a second accommodating cavity 35, and a tripping member 36 is provided in the second accommodating cavity 35, and the tripping member 36 causes the opening and closing operation assembly 4 to trip. Based on this, the transformer assembly 3 can be inserted into the bottom shell 1 as a whole or removed from the bottom shell 1 to facilitate the installation and replacement of the transformer assembly 3. At the same time, the mutual cooperation between the second accommodating cavity 35 and the two installation boxes enables the transformer assembly 3 to accommodate the above components while improving the space utilization of the transformer assembly 3, so as to further reduce the space occupation of the device.
[0033] In order to enable the device to automatically trip in an emergency and optimize the size of the tripping member 36, the tripping member 36 includes a bracket 318, and an electromagnetic coil 311 is provided in the bracket 318. A moving iron core 39 is provided in the electromagnetic coil 311, and the moving iron core 39 is connected to a push rod 316. Therefore, when the electromagnetic coil 311 is energized, the moving iron core 39 can be urged to move, so as to urge the push rod 316 to move, and then the push rod 316 is used to urge the traction rod 42 to move, so as to realize the tripping action of the opening and closing operation assembly 4.
[0034] Furthermore, since the bracket 318 is provided with an adsorption member 310 inside, the movable iron core 39 is adsorbed on the adsorption member 310 when the electromagnetic coil 311 is not energized. Therefore, when the electromagnetic coil 311 is de-energized, the adsorption member 310 adsorbs the movable iron core 39 to cause the push rod 316 to separate from the traction rod 42. The adsorption member 310 is preferably a permanent magnet.
[0035] In order to ensure that the push rod 316 can reliably cause the traction rod 42 to work after the electromagnetic coil 311 is energized, a guide portion 312 is further provided on the bracket 318, and the push rod 316 is sleeved outside the guide portion 312 through a sleeve 314, and an elastic member 313 is sleeved outside the sleeve 314. The sleeve 314 can be used to affect the directional sliding of the push rod 316, and the elastic member 313 can be used to cause the push rod 316 to move quickly after the suction force of the adsorption member 310 disappears.
[0036] Furthermore, in order to ensure the directional movement of the push rod 316, a guide rod 317 is further provided on the bracket 318, and the guide rod 317 is adapted to be connected with the guide groove 315 provided on the push rod 316. Therefore, by using the cooperation between the guide rod 317 and the guide groove 315, the directional sliding of the push rod 316 can be ensured, thereby improving the reliability of the device when it is tripped.
[0037] In addition, since the transformer assembly 3 also includes a circuit board 37, and the circuit board 37 is also provided with a power port 38, the program burned into the circuit board 37 can be used to realize automatic control of the device. In particular, the setting of the power port 38 makes the device convenient to obtain power.
[0038] Furthermore, since an identification frame 34 is also provided on the second installation box 33, and the power port 38 is supported by the identification frame 34, the power port 38 can be reliably and stably fixed to reduce the phenomenon of damage to the power port 38 during the plugging and unplugging process. In particular, the setting of the identification frame 34 makes it convenient for users to draw electricity.
[0039] 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 tripping mechanism for a molded case circuit breaker, characterized in that: The release member (36) comprises a bracket (318), an electromagnetic coil (311) is arranged in the bracket (318), a moving iron core (39) is arranged in the electromagnetic coil (311), and the moving iron core (39) is connected to a push rod (316).
2. A tripping mechanism for a molded case circuit breaker according to claim 1, characterized in that: An adsorption member (310) is also provided inside the bracket (318), and the moving iron core (39) is adsorbed on the adsorption member (310) by the adsorption member (310) when the electromagnetic coil (311) is not energized.
3. A tripping mechanism for a molded case circuit breaker according to claim 2, characterized in that: The bracket (318) is also provided with a guide portion (312), and the push rod (316) is sleeved outside the guide portion (312) through a sleeve (314).
4. A tripping mechanism for a molded case circuit breaker according to claim 3, characterized in that: An elastic member (313) is sleeved on the outside of the sleeve (314), and the elastic member (313) causes the push rod (316) to move outward.
5. A tripping mechanism for a molded case circuit breaker according to claim 4, characterized in that: A guide rod (317) is also provided on the bracket (318), and the guide rod (317) is adaptively connected to a guide groove (315) provided on the push rod (316).
6. A tripping mechanism for a molded case circuit breaker according to claim 5, characterized in that: The elastic member (313) is a coil spring, and the adsorption member (310) is a permanent magnet.