Electromagnetic release and circuit breaker

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses an electromagnetic release and a circuit breaker. The electromagnetic release comprises a coil framework which is provided with a cylinder cavity; one end of the movable iron core is arranged in the cylinder cavity in a sliding manner; the limiting piece is used for blocking a cavity opening, close to the other end of the movable iron core, of the barrel cavity, and the limiting piece is connected with the coil framework in a clamped mode; the elastic piece is arranged between the limiting piece and the movable iron core, one end of the elastic piece abuts against the limiting piece, and the other end of the elastic piece is arranged at the other end of the movable iron core in a sleeving mode. According to the electromagnetic release, the cylinder body of the coil framework cannot be deformed, and the limiting piece is prevented from falling off; no special tool is needed, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to an electromagnetic release and a circuit breaker. Background Art

[0002] Electromagnetic release is a device used for short-circuit protection, also known as electromagnetic protection mechanism. When the current flowing through the electromagnetic coil is equal to or greater than the set threshold, the magnetic field generated by the electromagnetic coil drives the moving iron core to move forward to overcome the elastic force of the spring, and the movement of the moving iron core drives the circuit breaker's release device to trip.

[0003] In the electromagnetic protection mechanism of the low-voltage circuit breaker in the prior art, the coil frame includes a frame body and a cylindrical cavity arranged in the frame body, the non-magnetic core positioning piece is fixedly connected to the cylindrical cavity of the coil frame, and the spring and the moving iron core are encapsulated in the cylindrical cavity through the fixed connection between the core positioning piece and the cylindrical cavity of the coil frame. When the current is greater than the set threshold, the magnetic field generated by the electromagnetic protection mechanism drives the magnetic moving iron core to overcome the elastic force of the spring and move toward the non-magnetic core positioning piece.

[0004] Since the non-magnetic core locating piece is fixedly connected to the barrel of the coil frame, and the fixed connection method is an interference fit, on the one hand, it is easy to cause deformation of the barrel of the coil frame, and there is a risk of the core locating piece falling off after long-term use; on the other hand, the core locating piece and the barrel of the coil frame have an interference fit, and special tools are required for assembly, which reduces assembly efficiency. Utility Model Content

[0005] The utility model aims to provide an electromagnetic release and a circuit breaker, which will not cause deformation of the cylinder of the coil skeleton and avoid the limiter from falling off; no special tools are needed, thereby improving assembly efficiency.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Electromagnetic release, comprising:

[0008] A coil frame having a barrel cavity;

[0009] A moving iron core, one end of which is slidably disposed in the cylindrical cavity;

[0010] a stopper, used for blocking the opening of the barrel cavity close to the other end of the moving iron core, and the stopper is clamped with the coil frame; and

[0011] The elastic member is arranged between the limiting member and the moving iron core, and one end of the elastic member abuts against the limiting member, and the other end of the elastic member is sleeved on the other end of the moving iron core.

[0012] As an optional solution for the electromagnetic release, the coil skeleton includes a cylinder and a first plate portion, the cylinder has the cylinder cavity, the first plate portion is arranged at one end of the cylinder, the limiting member includes a limiting plate and a plug block arranged on the limiting plate, the limiting plate is clamped with the first plate portion, and the plug block blocks the cylinder cavity.

[0013] As an optional solution for the electromagnetic release, the limit member is provided with a hook portion or a hole, the first plate portion is provided with the hole or the hook portion, and the hook portion is engaged with the hole.

[0014] As an optional solution for the electromagnetic release, at least two hook portions are spaced apart on the limit member, at least two holes are correspondingly provided on the first plate portion, and the distance between the two hook portions is greater than or less than the distance between the two holes.

[0015] As an optional solution for the electromagnetic release, the limiting member includes a plug block, a ring groove is provided on the circumferential wall of the plug block, and at least one first avoidance notch is provided on one side wall of the ring groove. The coil skeleton includes a cylinder body, and the cylinder body has the cylinder cavity. A latching protrusion is provided on the inner side wall of the cylinder body close to the cavity opening, and the latching protrusion can be placed in the ring groove through the first avoidance notch and be stopped on the side wall of the ring groove.

[0016] As an optional solution for the electromagnetic release, the moving iron core is provided with a second avoidance gap along its axial direction, and the clamping protrusion can enable the moving iron core to be inserted into the cylinder through the second avoidance gap.

[0017] As an optional solution for the electromagnetic release, the coil skeleton also includes a second plate portion, which is arranged at the other end of the cylinder, and the second plate portion is provided with a first annular limiting portion coaxial with the cylinder, and the circumferential wall of the moving iron core is provided with a second annular limiting portion, and the second annular limiting portion is stopped on the inner side wall of the first annular limiting portion.

[0018] As an optional solution for the electromagnetic release, a guide column is provided at the other end of the moving iron core, and the other end of the elastic member is sleeved on the guide column.

[0019] As an optional solution for the electromagnetic release, the electromagnetic release also includes a coil, the coil frame is provided with a first threading hole and a second threading hole, the spiral segment of the coil is wound on the coil frame, and one end of the coil is passed through the first threading hole, and the other end of the coil is passed through the second threading hole.

[0020] A circuit breaker comprises a housing and an electromagnetic release as described in any one of the above items, wherein the electromagnetic release is arranged in the housing.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The electromagnetic release provided by the utility model sleeves the elastic part on the other end of the moving iron core and places it in the cylinder of the coil skeleton, reducing the number of parts used. After the limiter is clamped with the coil skeleton, the limiter can block the cavity of the cylinder close to the other end of the moving iron core, and the elastic part is clamped between the limiter and the moving iron core, so that the moving iron core can be reset. The limiter adopts a clamping connection method instead of an interference fit, which will not cause deformation of the cylinder of the coil skeleton and prevent the limiter from falling off. The limiter adopts a clamping assembly method, which does not require the use of special tools, improves the assembly efficiency of the limiter, and is conducive to the mass production of electromagnetic releases.

[0023] In the circuit breaker provided by the utility model, the cylinder of the coil frame will not be deformed, thereby improving the assembly efficiency of the electromagnetic release. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the electromagnetic release in the first embodiment of the utility model from a first perspective;

[0025] Figure 2 This is a schematic diagram of the structure of the electromagnetic release in the first embodiment of the utility model from a second viewing angle;

[0026] Figure 3 It is an exploded schematic diagram of the electromagnetic release in the first embodiment of the utility model (the coil is not shown);

[0027] Figure 4 It is an exploded schematic diagram of the electromagnetic release in the second embodiment of the utility model.

[0028] In the figure:

[0029] 1. Coil frame; 2. Moving iron core; 3. Limiting piece; 4. Coil; 5. Elastic piece;

[0030] 11. Cylinder; 111. Clamping convex portion; 12. First plate portion; 121. Clamping hole; 122. First threading hole; 13. Second plate portion; 131. First annular limiting portion; 132. Second threading hole;

[0031] 21. guide column; 22. second annular limiting portion; 221. second avoidance gap;

[0032] 31. Block; 311. Annular groove; 312. First avoidance gap; 32. Hook portion; 33. Limiting plate. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] In order to prevent the coil skeleton from being deformed and the stopper from falling off, no special tools are required to improve assembly efficiency. This embodiment provides a positioning tool and a circuit breaker. Figures 1 to 4 The specific contents of this embodiment are described in detail.

[0038] Embodiment 1

[0039] like Figures 1 to 3As shown, the electromagnetic release in this embodiment includes a coil skeleton 1, a moving iron core 2, a limiter 3 and an elastic member 5. The coil skeleton 1 has a cylindrical cavity. One end of the moving iron core 2 is slidably disposed in the cylindrical cavity. The limiter 3 is used to block the cavity opening of the cylindrical cavity close to the other end of the moving iron core 2, and the limiter 3 is clamped with the coil skeleton 1. The elastic member 5 is disposed between the limiter 3 and the moving iron core 2, and one end of the elastic member 5 abuts against the limiter 3, and the other end of the elastic member 5 is sleeved on the other end of the moving iron core 2. Specifically, a guide column 21 is provided at the other end of the moving iron core 2, and the other end of the elastic member 5 is sleeved on the guide column 21.

[0040] In short, the electromagnetic release provided in this embodiment sleeves the elastic member 5 on the guide column 21 of the moving iron core 2 and places it in the cylinder 11 of the coil skeleton 1, reducing the number of parts used. After the limiter 3 is clamped with the coil skeleton 1, the limiter 3 can block the cavity of the cylinder 11 close to the other end of the moving iron core 2, and the elastic member 5 is clamped between the limiter 3 and the moving iron core 2, so that the moving iron core 2 can be reset. The limiter 3 uses a clamping connection method to replace the interference fit, which will not cause the cylinder 11 of the coil skeleton 1 to deform, and prevent the limiter 3 from falling off. The limiter 3 adopts a clamping assembly method, and no special tools are required, which improves the assembly efficiency of the limiter 3 and is conducive to the mass production of electromagnetic releases.

[0041] Further, the coil skeleton 1 includes a cylinder 11 and a first plate portion 12, the cylinder 11 has a cylinder cavity, the first plate portion 12 is arranged at one end of the cylinder 11, and the limiter 3 includes a limiter plate 33 and a plug 31 arranged on the limiter plate 33, the limiter plate 33 is clamped with the first plate portion 12, and the plug 31 is blocked in the cylinder cavity. When the electromagnetic release is installed in the circuit breaker, the tripping device of the circuit breaker is tripped by moving the moving iron core 2. The limiter 3 is clamped with the first plate portion 12, and the limiter 3 is provided with a plug 31, and the plug 31 is used to block the cylinder 11. A guide column 21 is provided at one end of the moving iron core 2 close to the limiter 3, and the elastic member 5 is sleeved on the guide column 21, and the two ends of the elastic member 5 are respectively abutted with the plug 31 and the moving iron core 2, and the moving iron core 2 can be reset under the action of the elastic member 5.

[0042] Furthermore, the coil skeleton 1 also includes a second plate portion 13, the first plate portion 12 and the second plate portion 13 are respectively arranged at opposite ends of the cylinder 11, the second plate portion 13 is provided with a first annular limiting portion 131 coaxial with the cylinder 11, the moving iron core 2 is provided with a second annular limiting portion 22, and the second annular limiting portion 22 is stopped at the inner side wall of the first annular limiting portion 131, wherein the two ends of the elastic member 5 are respectively abutted against the plug 31 and the second annular limiting portion 22. By adding the first annular limiting portion 131 and the second annular limiting portion 22, the travel limit function is played, and the moving iron core 2 can be prevented from falling off from the cavity of the cylinder 11 close to the second plate portion 13, so that the moving iron core 2 can always slide in the cylinder 11.

[0043] Exemplarily, the coil skeleton 1 is made of insulating material such as plastic, and the first plate portion 12 , the second plate portion 13 and the cylinder 11 are integrally formed by injection molding.

[0044] Further, the position limiting member 3 is provided with one of a hook portion 32 and a hole 121, the first plate portion 12 is provided with a hole 121 or the other of the hook portion 32, and the hook portion 32 is engaged with the hole 121. In this embodiment, the position limiting member 3 is provided with a hook portion 32, the first plate portion 12 is provided with a hole 121, and the hook portion 32 is engaged with the hole 121. When the position limiting member 3 needs to be assembled to the coil frame 1, the position limiting member 3 uses its own hook portion 32 to engage with the hole 121 on the first plate portion 12, which not only ensures the assembly stability of the position limiting member 3 and the coil frame 1, but also ensures that the cylinder 11 of the coil frame 1 does not deform.

[0045] Optionally, at least two hooks 32 are provided on the stopper 3, and at least two holes 121 are provided on the first plate 12. By increasing the number of hooks 32 and holes 121, the assembly firmness of the stopper 3 and the first plate 12 is further improved.

[0046] Preferably, the distance between the two hooks 32 is greater than or less than the distance between the two holes 121. By making the distance between the two hooks 32 unequal to the distance between the two holes 121, when the stopper 3 is connected to the first plate 12, the two hooks 32 are deformed to a certain extent, thereby increasing the clamping force of the two hooks 32 on the two holes 121, thereby avoiding the risk of the stopper 3 falling off.

[0047] Specifically, a first threading hole 122 is provided on the first plate portion 12, a second threading hole 132 is provided on the second plate portion 13, and the electromagnetic release device further comprises a coil 4, a spiral section of the coil 4 is wound on the cylinder 11, one end of the coil 4 is passed through the first threading hole 122, and the other end of the coil 4 is passed through the second threading hole 132. The current flows through the coil 4, and by adding the first threading hole 122 and the second threading hole 132, it is convenient to arrange and limit the ends of the wires at both ends of the coil 4, avoid the disorderly distribution of the ends of the wires, and avoid the risk of short circuit.

[0048] This embodiment also provides a circuit breaker, which includes a housing and the electromagnetic release mentioned above. The electromagnetic release is arranged in the housing, and the cylinder 11 of the coil skeleton 1 will not be deformed, thereby improving the assembly efficiency of the electromagnetic release, and the tripping device of the circuit breaker can be controlled by the electromagnetic release to trip.

[0049] Embodiment 2

[0050] This embodiment provides an electromagnetic release. Compared with the first embodiment, the basic structure of the electromagnetic release provided by this embodiment is the same as that of the first embodiment, and only the settings of the plug 31 and the second annular limiting portion 22 are different. This embodiment will not repeat the same structure as that of the first embodiment.

[0051] For example, Figure 4 As shown, the stopper 3 includes a plug 31, an annular groove 311 is provided on the circumferential wall of the plug 31, and at least one first avoidance notch 312 is provided on one side wall of the annular groove 311, and the annular groove 311 is communicated with the first avoidance notch 312. The coil skeleton 1 includes a cylinder 11, and the cylinder 11 has a cylinder cavity. A clamping protrusion 111 is provided on the inner side wall of the cavity of the cylinder 11 close to the first plate portion 12, and the clamping protrusion 111 can be placed in the annular groove 311 through the first avoidance notch 312 and stopped on the side wall of the annular groove 311, so that the coil skeleton 1 is clamped with the stopper 31. When the stopper 3 needs to be assembled with the cylinder 11, the first avoidance notch 312 is first aligned with the clamping protrusion 111 and inserted into the cylinder 11, and then the stopper 3 is screwed to make the clamping protrusion 111 enter the annular groove 311, so that the clamping protrusion 111 and the first avoidance notch 312 are staggered and matched to achieve a stable assembly effect.

[0052] Optionally, at least two first avoidance notches 312 communicating with the annular groove 311 are provided on the circumferential wall of the plug 31, and at least two clamping protrusions 111 are correspondingly provided in the cylinder 11. By increasing the number of first avoidance notches 312 and clamping protrusions 111, more clamping protrusions 111 can be clamped with the annular groove 311, further improving the assembly stability of the stopper 3 and the cylinder 11.

[0053] Furthermore, the movable iron core 2 is provided with a second avoidance notch 221 along its axial direction, and the clamping protrusion 111 can insert the movable iron core 2 into the cylinder 11 through the second avoidance notch 211. Specifically, the second annular limiting portion 22 is provided with a second avoidance notch 221, and the clamping protrusion 111 can insert the movable iron core 2 into the cylinder 11 through the second avoidance notch 221. Since the clamping protrusion 111 is provided in the cylinder 11, by providing the second avoidance notch 221 in the second annular limiting portion 22, it is convenient to insert the movable iron core 2 into the cylinder 11, and the staggered cooperation between the clamping protrusion 111 and the second avoidance notch 221 is utilized to prevent the movable iron core 2 from falling off from the cavity of the cylinder 11 close to the first plate portion 12.

[0054] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Electromagnetic release, characterized in that: include: A coil frame (1) having a cylindrical cavity; A moving iron core (2), one end of which is slidably disposed in the cylindrical cavity; A stopper (3) is used to block the cavity opening of the barrel cavity close to the other end of the moving iron core (2), and the stopper (3) is clamped with the coil frame (1); as well as The elastic member (5) is arranged between the limiting member (3) and the moving iron core (2), and one end of the elastic member (5) abuts against the limiting member (3), and the other end of the elastic member (5) is sleeved on the other end of the moving iron core (2).

2. The electromagnetic release according to claim 1, characterized in that: The coil skeleton (1) comprises a cylinder (11) and a first plate portion (12), the cylinder (11) having the cylinder cavity, the first plate portion (12) being arranged at one end of the cylinder (11), the limiting member (3) comprising a limiting plate (33) and a plug (31) arranged on the limiting plate (33), the limiting plate (33) being snap-connected with the first plate portion (12), and the plug (31) being sealed in the cylinder cavity.

3. The electromagnetic release according to claim 2, characterized in that: The limiting member (3) is provided with one of a hook portion (32) and a hole (121), and the first plate portion (12) is provided with the hole (121) and the other of the hook portion (32), and the hook portion (32) is engaged with the hole (121).

4. The electromagnetic release according to claim 3, characterized in that: At least two hook portions (32) are arranged at intervals on the limiting member (3), and at least two hook holes (121) are correspondingly arranged on the first plate portion (12), and the distance between the two hook portions (32) is greater than or less than the distance between the two hook holes (121).

5. The electromagnetic release according to claim 1, characterized in that: The limiting member (3) comprises a plug block (31), a circular groove (311) is provided on the circumferential wall of the plug block (31), and at least one first avoidance notch (312) is provided on a side wall of the circular groove (311); the coil skeleton (1) comprises a cylinder (11), the cylinder (11) has the cylinder cavity, and a locking protrusion (111) is provided on the inner side wall of the cylinder (11) close to the cavity opening, and the locking protrusion (111) can be placed in the circular groove (311) through the first avoidance notch (312) and stopped on the side wall of the circular groove (311).

6. The electromagnetic release according to claim 5, characterized in that: The movable iron core (2) is provided with a second avoidance notch (221) along its axial direction, and the clamping protrusion (111) can pass through the second avoidance notch (221) to allow the movable iron core (2) to be inserted into the cylinder (11).

7. The electromagnetic release according to any one of claims 2 to 6, characterized in that: The coil skeleton (1) also includes a second plate portion (13), the second plate portion (13) is arranged at the other end of the cylinder (11), the second plate portion (13) is provided with a first annular limiting portion (131) coaxial with the cylinder (11), and the circumferential wall of the moving iron core (2) is provided with a second annular limiting portion (22), and the second annular limiting portion (22) is stopped on the inner side wall of the first annular limiting portion (131).

8. The electromagnetic release according to claim 1, characterized in that: The other end of the moving iron core (2) is provided with a guide column (21), and the other end of the elastic member (5) is sleeved on the guide column (21).

9. The electromagnetic release according to claim 1, characterized in that: The electromagnetic release also includes a coil (4), the coil frame (1) is provided with a first threading hole (122) and a second threading hole (132), the spiral section of the coil (4) is wound on the coil frame (1), and one end of the coil (4) is passed through the first threading hole (122), and the other end of the coil (4) is passed through the second threading hole (132).

10. A circuit breaker, characterized in that It comprises a shell and an electromagnetic release as claimed in any one of claims 1 to 9, wherein the electromagnetic release is arranged in the shell.

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