CN215731502U - Contactor sound attenuation structure - Google Patents

Abstract

The utility model provides a noise reduction structure of a contactor, which comprises a contact mechanism, an outer cover fixed at the bottom of the contact mechanism and an electromagnetic mechanism arranged in the outer cover and linked with the contact mechanism; a silencing pad is arranged between the bottom of the electromagnetic mechanism and the outer cover; and the silencing pad and the electromagnetic mechanism are arranged at a distance. When the suction or release action is carried out, the buffer cushion can refract the noise generated by collision and block the noise from directly spreading outwards from the bottom of the outer cover, thereby realizing the function of reducing the noise, and controlling the suction and release noise of the product below 50 dB.

Description

Contactor sound attenuation structure

Technical Field

The utility model relates to the field of electrical devices, in particular to a noise reduction structure of a contactor.

Background

The contactor is an electronic control device, and comprises a contact mechanism and an electromagnetic mechanism which are arranged in a linkage manner, wherein the contact mechanism is used for externally connecting a circuit and is provided with a moving contact and a fixed contact. When the coil of the electromagnetic mechanism is electrified, the coil current can generate a magnetic field, the generated magnetic field enables the static iron core to generate electromagnetic attraction to attract the movable iron core and drives the contact mechanism of the contactor to act, so that the normally closed contact is opened or the normally open contact is closed, and the normally closed contact and the normally open contact are linked. When the coil is powered off, the electromagnetic attraction disappears, the movable iron core resets under the action of the spring, and the contact is restored, so that the normally open contact is disconnected or the normally closed contact is closed.

In the prior art, the contactor can be kept without noise, but the noise during attraction and release is not controlled (the actual measurement of a sample shows that the noise during attraction is 55dB-60dB, and the noise during release is 45dB-55 dB). Further improvements are needed.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a silencing structure of a contactor to solve the problems.

In order to achieve the purpose, the technical scheme provided by the utility model is as follows:

a contactor noise reduction structure comprises a contact mechanism, an outer cover fixed at the bottom of the contact mechanism and an electromagnetic mechanism arranged in the outer cover and linked with the contact mechanism; a silencing pad is arranged between the bottom of the electromagnetic mechanism and the outer cover; and the silencing pad and the electromagnetic mechanism are arranged at a distance.

Furthermore, a convex part is protruded on the upper surface of the silencing pad and abuts against the electromagnetic mechanism.

Further, the convex part is a punctiform convex bud.

Furthermore, the convex bracts on the upper surface of the silencing pad are distributed in an array.

Further, the shape of the convex bracts is a square column shape, a prism shape, a cylinder shape or a frustum shape.

Furthermore, the convex part is a strip-shaped convex rib.

Furthermore, the convex ribs on the upper surface of the silencing pad are crossed in the transverse direction and the longitudinal direction to form a grid-shaped structure.

Furthermore, a buffer spring is arranged between the bottom of the electromagnetic mechanism and the outer cover.

Furthermore, the silencing pad is a rubber pad.

Furthermore, the electromagnetic mechanism comprises a coil framework, a movable iron core penetrating through the coil framework, a coil wound on the coil framework, a spring arranged between the bottom of the movable iron core and the outer cover, and two auxiliary yokes, two permanent magnets and two static iron cores which are symmetrically arranged on the left side and the right side of the coil respectively; the two static iron cores are C-shaped and are matched together to form an outer cladding structure, the silencing pad is arranged between the static iron cores and the outer cover, and the silencing pad is provided with a yielding hole for the yielding spring to penetrate through.

Furthermore, a silencing pad is also arranged between the peripheral side of the electromagnetic mechanism and the outer cover.

Through the technical scheme provided by the utility model, the method has the following beneficial effects:

the noise reduction pad is arranged between the bottom of the electromagnetic mechanism and the outer cover, and the noise reduction pad and the electromagnetic mechanism are arranged at intervals, namely the noise reduction pad is not directly contacted with the electromagnetic mechanism; when the suction or release action is carried out, the noise generated by collision can be refracted by the silencing pad, and the noise is blocked and directly spread outwards from the bottom of the outer cover, so that the effect of reducing the noise is realized, and the suction and release noise of the product can be controlled below 50 dB.

Drawings

Fig. 1 is a schematic perspective view illustrating a noise reduction structure of a contactor according to an embodiment, in which a housing structure is hidden;

FIG. 2 is a schematic perspective view of a noise-reduction structure of the contactor according to another angle in the first embodiment, in which the housing structure is hidden;

FIG. 3 is a top view of a contactor noise dampening structure according to one embodiment;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic partial exploded view of a noise-reducing structure of a contactor according to an embodiment;

FIG. 6 is a schematic structural diagram of a middle acoustic pad according to a first embodiment;

fig. 7 is a schematic structural diagram of the middle sounding pad according to the second embodiment.

Detailed Description

To further illustrate the various embodiments, the utility model provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the utility model and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The utility model will now be further described with reference to the accompanying drawings and detailed description.

Example one

Referring to fig. 1 to 6, the present embodiment provides a noise reduction structure for a contactor, including a contact mechanism 10, a housing 30 fixed at the bottom of the contact mechanism 10, and an electromagnetic mechanism 20 disposed in the housing 30 and linked with the contact mechanism 10; the contact mechanism 10, the housing 30 and the electromagnetic mechanism 20 are arranged, and the structure is more compact and firm. Specifically, the electromagnetic mechanism 20 includes a bobbin 21, a movable iron core (not shown) inserted into the bobbin 21, a coil 22 wound on the bobbin 21, a spring 24 disposed between the bottom of the movable iron core and the outer cover 30, and two auxiliary yokes (not shown), two permanent magnets (not shown) and two stationary iron cores 23 symmetrically disposed on the left and right sides of the coil 22; namely, the same side of the coil 22 is provided with the auxiliary yoke, the permanent magnet and the static iron core 23 from inside to outside. Wherein, the two stationary cores 23 are C-shaped and cooperate together to form an outer cladding structure as the outer layer structure of the electromagnetic mechanism 20. The electromagnetic mechanism 20 has a simple structure and stable operation. Of course, in other embodiments the electromagnetic mechanism 20 may be replaced with other existing structures.

The contact mechanism 10 is directly realized by adopting the existing structure, and the linkage connection of the contact mechanism 10 and the electromagnetic mechanism 20 is also the prior art, and is not described in detail here.

A silencing pad 40 is arranged between the bottom of the electromagnetic mechanism 20 and the outer cover 30; specifically, the noise-damping pad 40 is disposed between the stationary core 23 and the outer cover 30; and the silencing pad 40 is arranged at a distance from the electromagnetic mechanism 20, that is, the silencing pad 40 is not in direct contact with the electromagnetic mechanism 20. Meanwhile, the silencing pad 40 is provided with a yielding hole 42 for the yielding spring to pass through, so that yielding is realized. Of course, the two stationary cores 23 are matched to form an outer cladding structure, and a yielding hole (not shown) for passing the yielding spring is also arranged.

By providing a sound-deadening pad 40 between the bottom of the electromagnetic mechanism 20 and the housing 30; when the suction or release action is carried out, the noise generated by collision can be refracted by the silencing pad 40, and the noise is blocked from being directly transmitted outwards from the bottom of the outer cover 30, so that the effect of reducing the noise is realized, and the noise can be controlled below 50dB when the product is sucked and released.

Further, in this embodiment, the upper surface of the sound-deadening pad 40 is protruded with a convex portion 41, specifically, the convex portion 41 is a dot-shaped convex bud 411, and more specifically, the convex buds 411 on the upper surface of the sound-deadening pad 40 are distributed in an array. The electromagnetic mechanism 20 (specifically, the stationary iron core 23 of the electromagnetic mechanism 20) is abutted by the bracts 411. The protrusions 411 arranged in an array can increase the area of the upper surface of the sound-deadening pad 40, and can refract noise better. The silencing effect is better.

More specifically, in this embodiment, the shape of the protrusions 411 is a frustum shape, and the protrusions have a refraction surface inclined upward, so that the refraction noise effect is better. Of course, in other embodiments, the shape of the protrusions 411 may be a dot-shaped protrusion structure such as a square column shape, a prism shape, or a cylindrical shape. The arrangement of the protrusions 411 is not limited to the above-mentioned array distribution, and may be distributed in a scattered manner.

Further, the silencing pad 40 is a rubber pad; the noise reduction device has the advantages of good noise reduction effect, low cost and easy realization. Of course, in other embodiments, the material is not limited to this, and the material with the noise reduction function may also be used.

Specifically, in this embodiment, in order to buffer the electromagnetic mechanism 20, in this embodiment, a buffer spring 50 is further disposed between the bottom of the electromagnetic mechanism 20 and the outer cover 30, and the silencing pad 40 is provided with a yielding notch for the yielding buffer spring 50 to pass through. By adding the damper spring 50 to damp the operation of the electromagnetic mechanism 20, the vibration generated by the operation of the electromagnetic mechanism 20 is not directly transmitted to the noise-damping pad 40, and the function of the noise-damping pad 40 is not affected.

Example two

The present embodiment provides a contactor noise reduction structure, which is substantially the same as the first contactor noise reduction structure provided in the embodiment, and the difference is that: referring to fig. 7, the convex portion 41 on the upper surface of the sound-deadening pad 40 is a rib 412 in the shape of a bar. Specifically, the convex ribs 412 on the upper surface of the silencing pad 40 are crossed in the transverse direction and the longitudinal direction to form a grid-shaped structure; the grid-like structure is more stable in support. Of course, in other embodiments, the ribs 412 may be arranged side by side in one direction.

EXAMPLE III

The present embodiment provides a contactor noise reduction structure, which is substantially the same as the first contactor noise reduction structure provided in the embodiment, and the difference is that: the upper surface of the sound-deadening pad 40 is flat, i.e., has no raised convex structure.

Example four

The present embodiment provides a contactor noise reduction structure, which is substantially the same as the first contactor noise reduction structure provided in the embodiment, and the difference is that: in the present embodiment, sound-deadening pads (defined as lateral sound-deadening pads, not shown) are also provided between the peripheral sides (i.e., four side surfaces) of the electromagnetic mechanism 20 and the housing 30; the full-coating structure with 5 surfaces on the periphery and the bottom is formed, and the noise reduction effect is better.

More specifically, in order to ensure that the lateral silencing pad and the electromagnetic mechanism keep a distance, the lateral silencing pad is arranged on the inner wall of the outer cover.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. The utility model provides a contactor amortization structure which characterized in that: the electromagnetic contactor comprises a contact mechanism, an outer cover fixed at the bottom of the contact mechanism and an electromagnetic mechanism which is arranged in the outer cover and is linked with the contact mechanism; a silencing pad is arranged between the bottom of the electromagnetic mechanism and the outer cover; and the silencing pad and the electromagnetic mechanism are arranged at a distance.

2. The contactor silencing structure of claim 1, wherein: the upper surface of the silencing pad is provided with a convex part in a protruding mode.

3. The contactor silencing structure of claim 2, wherein: the convex part is a punctiform convex bud.

4. The contactor silencing structure of claim 3, wherein: the convex bracts on the upper surface of the silencing pad are distributed in an array.

5. The contactor silencing structure according to claim 3 or 4, wherein: the shape of the convex bract is square column shape, prism shape, cylinder shape or frustum shape.

6. The contactor silencing structure of claim 2, wherein: the convex part is a strip-shaped convex rib; the raised ribs are crosswise in the transverse direction and the longitudinal direction to form a grid-like structure.

7. The contactor silencing structure of claim 1, wherein: and a buffer spring is also arranged between the bottom of the electromagnetic mechanism and the outer cover.

8. The contactor silencing structure of claim 1, wherein: the silencing pad is a rubber pad.

9. The contactor silencing structure of claim 1, wherein: the electromagnetic mechanism comprises a coil framework, a movable iron core arranged in the coil framework in a penetrating mode, a coil wound on the coil framework, a spring arranged between the bottom of the movable iron core and the outer cover, and two auxiliary yokes, two permanent magnets and two static iron cores which are symmetrically arranged on the left side and the right side of the coil respectively; the two static iron cores are C-shaped and are matched together to form an outer cladding structure, the silencing pad is arranged between the static iron cores and the outer cover, and the silencing pad is provided with a yielding hole for the yielding spring to penetrate through.

10. The contactor silencing structure according to claim 1 or 9, wherein: a silencing pad is also arranged between the peripheral side of the electromagnetic mechanism and the outer cover.

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