Electric tripping and opening mechanism of circuit breaker

Abstract

The utility model discloses an electric tripping and opening mechanism of a circuit breaker. The electric tripping and opening mechanism comprises a lock catch, an armature, a gear, a fixed shaft and a reset torsion spring of a tripping mechanism of the circuit breaker, the gear is rotatably mounted in the circuit breaker shell, and a third bump is fixed on the outer side of the gear; the fixed shaft is fixed in the circuit breaker shell; the lower end of the armature rotatably sleeves the fixed shaft, and the upper end of the armature extends between the lock catch and the gear and corresponds to the lock catch in position; the reset torsion spring is sleeved on the fixed shaft; two ends of the reset torsion spring are respectively clamped on the armature and the circuit breaker shell; and the third bump can rotate along with the gear to push the armature, so that the armature strikes the lock catch, and the tripping mechanism of the circuit breaker is tripped and opened. According to the utility model, the gear directly acts on the armature of the instantaneous tripping mechanism of the circuit breaker, so that the tripping mechanism of the circuit breaker is unlocked and tripped, the breaking function of the mechanism is realized without adding parts, the mechanism is simple, the number of parts is small, and the function is reliable.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage electrical equipment, and particularly relates to an electric tripping and opening mechanism of a circuit breaker. Background Technique

[0002] Since the current low-voltage electrical field is developing towards the intelligent direction, such as smart home and 5G communication, and the 5G network construction is in full swing. However, in the aspect of intelligent control of the current distribution industry's intelligent miniature circuit breakers, the reliability still needs to be improved. Content of the Utility Model

[0003] To solve the above problems, the purpose of the utility model is to specifically design this "electric tripping and breaking mechanism" to realize and improve the electric tripping function and reliability of the intelligent miniature circuit breaker under this background.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] An electric tripping and opening mechanism of a circuit breaker includes a latch, an armature, a gear, a fixed shaft and a reset torsion spring of the circuit breaker tripping mechanism; the gear is rotatably installed in the circuit breaker housing, and a third convex block is fixed on the outer side of the gear; the fixed shaft is fixed in the circuit breaker housing; the lower end of the armature is rotatably sleeved on the fixed shaft, and the upper end extends between the latch and the gear and corresponds to the position of the latch; the reset torsion spring is sleeved on the fixed shaft, and both ends of the reset torsion spring are respectively stuck on the armature and the circuit breaker housing; the third convex block can push the armature as the gear rotates, so that the armature strikes the latch, and the tripping mechanism of the circuit breaker trips and opens.

[0006] Further, a first convex block is provided on the latch, and a second convex block matching with the first convex block is provided at the upper end of the armature. When the armature swings towards the latch, the second convex block strikes the first convex block, so that the tripping mechanism of the circuit breaker trips and opens.

[0007] Further, the armature is the armature in the instantaneous tripping mechanism of the circuit breaker, and shares one armature with the instantaneous tripping mechanism of the circuit breaker, saving parts and costs and saving the internal space of the circuit breaker.

[0008] Further, the gear includes but is not limited to any one or several combinations of cylindrical gears, bevel gears, non-circular gears, racks, worm gears, spur gears, helical gears, herringbone gears, curve gears, external gears and internal gears.

[0009] Further, teeth are provided in more than two-thirds of the outer circumference area of the gear, and the third convex block is arranged in the area of the outer circumference of the gear where no teeth are provided.

[0010] Further, the end face of the third convex block for pushing the armature is an arc surface.

[0011] The utility model directly acts on the armature of the instantaneous tripping mechanism of the circuit breaker through a gear, so that the tripping mechanism of the circuit breaker is unlocked and tripped. There is no need to add parts to realize the breaking function of the mechanism. The mechanism is simple, the number of parts is small, and the function is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The structure of the utility model will be further described in detail below with reference to the drawings.

[0013] Figure 1 It is a schematic diagram of the electric tripping and opening mechanism of the utility model in the tripped state.

[0014] Figure 2 It is a schematic diagram of the electric tripping and opening mechanism of the utility model in the closed state.

[0015] Figure 3 It is a schematic diagram of the electric tripping and opening mechanism of the utility model in the closed state.

[0016] Figure 4 It is a schematic diagram of the structure of the latch of the utility model.

[0017] Figure 5 It is a schematic diagram of the structure of the gear of the utility model.

[0018] Figure 6 It is a schematic diagram of the structure of the armature of the utility model.

[0019] As shown in the figure: 1 - latch, 11 - first convex block, 2 - armature, 21 - second convex block, 22 - pressure receiving surface, 3 - gear, 31 - third convex block, 5 - fixed shaft, 5 - return torsion spring. SPECIFIC EMBODIMENTS

[0020] The following specific embodiments illustrate the implementation manners of the utility model. Those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in this specification. The described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the utility model.

[0021] It should be noted that the structures, proportions, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of this utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the efficacy that this utility model can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in this utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of this utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which this utility model can be implemented.

[0022] In the description of this utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances. It should be noted that the terms "include", "comprise", or any other variant are intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article, or device. Embodiment

[0023] As Figure 1-6 As shown, this embodiment provides an electric trip and opening mechanism for a circuit breaker, which includes a latch 1, an armature 2, a gear 3, a fixed shaft 4, and a return torsion spring 5.

[0024] The latch 1 is a component of the circuit breaker trip mechanism in a conventional circuit breaker. In the conventional circuit breaker trip mechanism, the latch 1 and the trip latch are latched together. When the latch 1 is rotated to release the latching with the trip latch, the circuit breaker trip mechanism trips and opens (the moving contact separates from the static contact). A first convex block 11 is provided on the side of the latch 1 facing the gear.

[0025] The gear 3 is rotatably installed inside the circuit breaker housing. The gear 3 includes, but is not limited to, any one or several combinations of cylindrical gears, bevel gears, non-circular gears, racks, worm gears, spur gears, helical gears, herringbone gears, curve gears, external gears, and internal gears. More than two-thirds of the outer circumference of the gear 3 is provided with teeth. A third convex block 31 is fixed on the outside of the gear 3 and is arranged in the area where there are no teeth on the outer circumference of the gear 3. The third convex block 31 can push the armature 2 as the gear 3 rotates, causing the armature 2 to strike the latch 1 and making the circuit breaker tripping mechanism trip and open. The end face of the third convex block 31 is an arc surface (for pushing the armature 2).

[0026] The fixed shaft 4 is vertically fixed inside the circuit breaker housing and is located below the gear 3.

[0027] The lower end of the armature 2 is rotatably sleeved on the fixed shaft 4 and can rotate around the fixed shaft 4. The upper end of the armature 2 extends between the latch 1 and the gear 3 and corresponds to the position of the latch 1. A second convex block 21 that cooperates with the first convex block 11 is provided at the upper end of the armature 2. The surface of the armature 2 facing the third convex block 31 is the pressure-receiving surface 22. When the armature 2 swings towards the latch 1 under the pushing of the third convex block 31, the second convex block 21 will strike the first convex block 11, driving the latch 1 to rotate. The latch 1 is disengaged from the trip 1 of the circuit breaker tripping mechanism, causing the circuit breaker tripping mechanism to trip and open. The armature 2 is the armature in the instantaneous tripping mechanism of the circuit breaker. In this embodiment, the method of sharing one armature with the instantaneous tripping mechanism of the circuit breaker is adopted, saving parts and costs and saving the internal space of the circuit breaker.

[0028] The return torsion spring 5 is sleeved on the fixed shaft 4. One torsion arm of the return torsion spring 5 is stuck on the armature 2, and the other torsion arm of the return torsion spring 5 is stuck on the circuit breaker housing, and is used to reset the armature 2 after the armature 2 strikes the latch 1.

[0029] In order to drive the gear 3 to rotate, a reduction motor is provided inside the circuit breaker housing. The reduction motor and the gear 3 can be directly linked, or common transmission components can be provided between the reduction motor and the gear 3 to transmit the power of the reduction motor to the gear 3. Common transmission components include, but are not limited to, gears, gear sets, or transmission belts, etc. For example, if the gear 3 is a turbine, then a worm that cooperates with the gear 3 is coaxially connected to the reduction motor to achieve transmission. The selection of the type of the gear 3 and the type of the transmission component can be arbitrarily matched according to actual needs.

[0030] Working principle

[0031] Electrical tripping (breaking):

[0032] Such as Figure 2As shown, when the circuit breaker is in the on state (the third protrusion 31 of the gear 3 is located at the upper right of the armature 2, and the second protrusion 21 of the armature 2 is not in contact with the first protrusion 11 of the lock catch 1), the motor and the worm are used to control the gear 3 to move counterclockwise (the gear 3 is a turbine), and the third protrusion 31 of the gear 3 pushes against the pressure surface 22 of the armature 2, causing the armature 2 to move counterclockwise around the fixed shaft 4. At this time, the second protrusion 21 at the end of the armature 2 pushes against the first protrusion 11 on the lock catch 1, thereby pushing the lock catch 1 to rotate and trip the tripping mechanism, thereby unlocking and tripping the circuit breaker, completing the disconnection action (as shown in FIG. Figure 3 Then the motor and worm control gear 3 to move clockwise and return to the Figure 1 The position shown (the circuit breaker is open, the third protrusion 31 of the gear 3 is disengaged from the armature 2, and the armature 2 is reset by the reset torsion spring 5, and the second protrusion 21 of the armature 2 is disengaged from the first protrusion 11 of the lock 1).

[0033] Other aspects of the present invention that are not described in detail are all conventional technologies known to those skilled in the art.

[0034] It should be noted that the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements that are inherent to such process, method, article, or apparatus.

[0035] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific implementation methods. Any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. An electric tripping and opening mechanism for a circuit breaker, including a latch (1) of the circuit breaker tripping mechanism, characterized in that: It further includes an armature (2), a gear (3), a fixed shaft (4), and a return torsion spring (5); the gear (3) is rotatably installed in the circuit breaker housing, and a third convex block (31) is fixed on the outer side of the gear (3); the fixed shaft (4) is fixed in the circuit breaker housing; the lower end of the armature (2) is rotatably sleeved on the fixed shaft (4), and the upper end extends between the latch (1) and the gear (3) and corresponds to the position of the latch (1); the return torsion spring (5) is sleeved on the fixed shaft (4), and both ends of the return torsion spring (5) are respectively stuck on the armature (2) and the circuit breaker housing; the third convex block (31) can push the armature (2) as the gear (3) rotates, so that the armature (2) strikes the latch (1), causing the circuit breaker tripping mechanism to trip and open.

2. The electric trip and opening mechanism of the circuit breaker according to claim 1, characterized in that: A first convex block (11) is provided on the latch (1), and a second convex block (21) cooperating with the first convex block (11) is provided at the upper end of the armature (2). When the armature (2) swings towards the latch (1), the second convex block (21) strikes the first convex block (11), causing the circuit breaker tripping mechanism to trip and open.

3. The electric trip and opening mechanism of the circuit breaker according to claim 1, characterized in that: The armature (2) is the armature in the instantaneous tripping mechanism of the circuit breaker.

4. The electric trip and opening mechanism of the circuit breaker according to claim 1, characterized in that: The gear (3) includes any one or several combinations of a cylindrical gear, a bevel gear, a non-circular gear, a rack, a worm and worm gear, a spur gear, a helical gear, a herringbone gear, a curve gear, an external gear, and an internal gear.

5. The electric trip and opening mechanism of the circuit breaker according to claim 1, characterized in that: Teeth are provided in more than two-thirds of the outer circumference area of the gear (3), and the third convex block (31) is provided in the area of the outer circumference of the gear (3) where no teeth are provided.

6. The electric trip and opening mechanism of the circuit breaker according to claim 1, characterized in that: The end face of the third convex block (31) for pushing the armature (2) is an arc surface.

Images