Permanent magnetic mechanism and coil protection structure thereof

Abstract

The utility model discloses a permanent magnetic mechanism and a coil protection structure thereof, the coil protection structure comprises a static iron core, a movable iron core assembly and a coil arranged between the static iron core and the movable iron core assembly, an upper protection plate is arranged between the upper end of the coil and the static iron core, and a lower protection plate is arranged between the lower end of the coil and the movable iron core assembly; the upper protection plate and the lower protection plate are made of non-magnetic materials. According to the utility model, the coil is ensured not to be damaged in the ultra-long service life of the permanent magnetic mechanism, and the permanent magnetic mechanism can work stably and reliably.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of high, low voltage vacuum electric appliance switch accessories of electric power system, in particular to a permanent magnet mechanism and coil protection structure thereof. BACKGROUND

[0002] Permanent magnet mechanism causes the universal attention of the industry with its high reliability, long life, easy control and other advantages and obtains the rapid development. Coil is the operating power source component in permanent magnet mechanism, and the reliability thereof is crucial to the action reliability of permanent magnet mechanism. The vibration formed in the opening and closing operation of permanent magnet mechanism causes the mutual impact force between the components in permanent magnet mechanism, and the coil framework as the supporting piece of coil adopts plastic material, and the impact force resistance is poor. Especially when the impact force acts on the local coil framework, the long-term accumulation can cause the damage of coil framework, and further damage the insulation of coil, and cause the failure of permanent magnet mechanism. UTILITY MODEL CONTENT

[0003] The utility model aims at providing a permanent magnet mechanism and coil protection structure thereof, which can guarantee that the coil is not damaged and can work stably and reliably in the super-long life period of permanent magnet mechanism.

[0004] In order to realize the above object, the technical scheme adopted by the utility model is:

[0005] A permanent magnet mechanism coil protection structure comprises a static iron core, a dynamic iron core assembly and a coil arranged between the static iron core and the dynamic iron core assembly, and the structural characteristics are that an upper protection plate is arranged between the upper end of the coil and the static iron core, and a lower protection plate is arranged between the lower end of the coil and the dynamic iron core assembly; the upper protection plate and the lower protection plate are made of non-magnetic material.

[0006] The permanent magnet mechanism of the utility model is designed with protection plates at the upper end and the lower end of the coil. The protection plates are made of non-magnetic material, so that the coil is fixed in the cavity of the permanent magnet mechanism and does not move or rotate. The impact of the internal components of the permanent magnet mechanism on the coil caused by the vibration in the opening and closing operation of the permanent magnet mechanism is avoided. Especially, the long-term impact can cause the damage of the coil framework, and further damage the insulation of the coil, leading to the failure of the permanent magnet mechanism.

[0007] According to the embodiments of the utility model, the utility model can be further optimized. The following is the technical scheme formed after optimization:

[0008] In one preferred embodiment, the upper protection plate and / or the lower protection plate are in the form of a circular ring plate, and the circular ring faces of the upper protection plate and / or the lower protection plate correspond to the upper end and the lower end of the coil framework.

[0009] Based on the same inventive concept, the utility model still provides a kind of permanent magnet mechanism, it includes upper end cover, with the outer magnetic yoke of upper end cover fixed connection, its structural characteristics are also including the permanent magnet mechanism coil protection structure of described;Outer magnetic yoke with the static core between being equipped with permanent magnet, and the permanent magnet is located between the upper protection plate and upper end cover.

[0010] In one preferred embodiment, the outer magnetic yoke lower end has shoulder extending to inside, and the lower end surface of the lower protection plate is supported on the shoulder.

[0011] Compared with prior art, the utility model has the beneficial effects that:

[0012] The permanent magnet mechanism coil protection structure of the utility model makes impact force act on protection plate, since protection plate and coil framework are full-contact structure, so that coil framework uniformly bears this impact force without breakage, thereby effectively guaranteeing the reliability of permanent magnet mechanism super-long life action. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structure principle diagram of one embodiment of the utility model. DETAILED DESCRIPTION

[0014] The utility model will be described in detail below with reference to the drawings and in combination with embodiments. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if "upper", "lower", "left", "right" appear in the following text, it only indicates the same direction as the upper, lower, left and right of the drawing itself, and does not limit the structure.

[0015] Comparison Figure 1 It can be seen that the permanent magnet mechanism of the embodiment mainly consists of moving iron core assembly 1, outer magnetic yoke 2, coil 3, permanent magnet 4, static core 5, upper end cover 6 and upper protection plate 7 and lower protection plate 8. Coil 3 is that the set enameled wire is wound on coil framework 3-1 according to technical requirements, and is made by good binding and impregnation of insulating paint, and coil framework 3-1 is plastic material, and upper protection plate 7 and lower protection plate 8 are non-magnetic steel plate. In the embodiment, upper protection plate 7 and lower protection plate 8 are arranged on the upper end and lower end of coil 3, so that the impact force of vibration generated during the operation of permanent magnet mechanism in opening and closing is acted on upper protection plate 7 and lower protection plate 8, and coil 3 is protected.

[0016] In the manufacture of the coil 3, after winding, its height will be higher than the original height of the coil skeleton 3-1, especially after impregnating the insulating paint, the height dimension will continue to increase, and the comprehensive effect will be 0.5-1mm. After the coil 3 is installed in the cavity of the permanent magnet mechanism, it is ensured that neither axial movement nor rotation around the axis occurs; through reasonable size chain design, after the permanent magnet mechanism is assembled, the height of the coil 3 is compressed by 0.2-0.5mm compared with the height after being manufactured, so that it is firmly fixed.

[0017] During assembly: first, the lower protection plate 8 is installed in the inner cavity of the outer magnetic yoke 2, and is installed at the shoulder 2-1 at the lower end of the outer magnetic yoke; then the coil 3 is placed in the inner cavity of the outer magnetic yoke 2 and is seated above the lower protection plate 8; then the upper protection plate 7 is also placed in the inner cavity of the permanent magnet mechanism and is seated above the coil 3; then the static iron core 5 is installed in the inner cavity of the outer magnetic yoke 2, and the boss is embedded in the inner cavity of the coil 3, so that the shaft shoulder surface is seated above the upper protection plate 7; then the permanent magnet 4 is installed in the gap between the outer magnetic yoke 2 and the static iron core 5; at this time, the upper plane formed by the static iron core 5 and the permanent magnet 4 will be higher than the annular plane of the upper part of the outer magnetic yoke, and according to the calculation of the size chain, it will be 0.2-0.5mm higher; then the upper end cover 6 is connected and fastened with the outer magnetic yoke 2 and the static iron core 5 by screws to form a whole, at this time, the coil 3 will be compressed by 0.2-0.5mm along the axial direction, so that it is firmly fixed in the permanent magnet mechanism; finally, the moving iron core assembly 1 is sequentially installed in the inner cavity of the coil 3, the inner hole of the static iron core 5, and the matching inner hole of the upper end cover 6 from bottom to top, and is kept at the closing terminal position by the magnetic field attraction force. At this time, the assembly of the permanent magnet mechanism is completed.

[0018] Although the coil 3 has been firmly fixed in the cavity of the permanent magnet mechanism, the impact force caused by the vibration during the opening and closing operation of the permanent magnet mechanism still exists, in order to make the impact force uniformly act on the two end faces of the coil skeleton 3-1, the upper protection plate 7 and the lower protection plate 8 are arranged at the upper and lower ends of the coil skeleton 3-1, wherein: the upper protection plate 7 and the lower protection plate 8 are preferably non-magnetic circular ring plate structures, and the circular ring faces thereof correspond to the upper and lower end circular ring faces of the coil skeleton 3-1, so that the area of the coil skeleton 3-1 subjected to the impact force caused by the vibration during the opening and closing operation of the permanent magnet mechanism is increased, the impact force per unit area is greatly reduced, the integrity of the coil skeleton 3-1 is effectively protected from being damaged, and the coil 3 can work stably and reliably, which matches the super-long service life of the permanent magnet mechanism.

[0019] The content illustrated in the above embodiments should be understood as the embodiments only for more clearly illustrating the utility model, and should not be used to limit the scope of the utility model, after reading the utility model, the modification of various equivalent forms of the embodiments by those skilled in the art all falls within the scope defined by the claims of the utility model.

Claims

1. A permanent magnet mechanism coil protection structure, comprising a stationary iron core (5), a moving iron core assembly (1), and a coil (3) arranged between the stationary iron core (5) and the moving iron core assembly (1), characterized in that: An upper protective plate (7) is provided between the upper end of the coil (3) and the static iron core (5), and a lower protective plate (8) is provided between the lower end of the coil (3) and the moving iron core assembly (1); both the upper protective plate (7) and the lower protective plate (8) are made of non-magnetic material.

2. The permanent magnet mechanism coil protection structure according to claim 1, characterized in that: The upper protection plate (7) and / or the lower protection plate (8) are annular flat plate structures, and the annular surfaces thereof correspond to the upper and lower annular surfaces of the coil skeleton (3-1) respectively.

3. A permanent magnet mechanism comprising an upper end cover (6), an outer magnetic yoke (2) fixedly connected to the upper end cover (6), characterized in that It also includes the permanent magnet mechanism coil protection structure as described in claim 1 or 2; a permanent magnet (4) is provided between the outer magnetic yoke (2) and the static iron core (5), and the permanent magnet (4) is located between the upper protection plate (7) and the upper end cover (6).

4. The permanent magnet mechanism according to claim 3, characterized in that: The lower end of the outer magnetic yoke (2) has a shoulder (2-1) extending inward, and the lower end surface of the lower protective plate (8) is supported on the shoulder (2-1).

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