A low noise relay

Abstract

The utility model discloses a low noise relay, including the casing and setting in the casing's main part component, and this main part component includes contact part and magnetic circuit part, and contact part is equipped with a plurality of contact point lead -out foot, contact point lead -out foot extends to the casing outside, and the magnetic circuit part includes the core, still including the noise reduction structure, and this noise reduction structure sets up in casing and / or main part component, and this noise reduction structure is located on contact point lead -out foot and / or core's noise transmission path, and can absorb contact point lead -out foot and / or core transmission's mechanical noise. The utility model can greatly reduce the noise of the movement to the outside transmission, thereby the noise performance of relay is improved significantly, satisfies the strict requirement of new energy electric automobile to low noise component and satisfies the strict requirement of new energy electric automobile to low noise component, and the utility model can improve the quietness and the driving comfort of whole car under the premise of not influencing the electrical performance and the reliability of relay.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, and in particular to a low-noise relay. Background Technology

[0002] In new energy electric vehicles, high-voltage relays serve as key components, playing a crucial role in interrupting current and switching circuits. Because electric vehicles are driven by electric motors, the overall operating noise is significantly lower than that of traditional gasoline-powered vehicles. This makes the mechanical noise generated by the moving parts inside the relay (such as the armature striking the iron core and the moving spring striking the stationary spring) particularly prominent in quiet environments. This noise is transmitted to the outside through the contact leads and the iron core, and currently, the industry lacks mature and effective noise reduction solutions. Therefore, more and more customers are placing higher demands on relay noise control. Utility Model Content

[0003] This invention addresses the technical problems existing in the prior art by providing a low-noise relay, which effectively reduces the mechanical noise generated by the moving parts inside the relay during operation through optimized structural design.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a low-noise relay, including a housing and a main body assembly disposed within the housing, the main body assembly including a contact portion and a magnetic circuit portion, the contact portion having a plurality of contact leads extending to the outside of the housing; the magnetic circuit portion including an iron core; and further including a noise reduction structure disposed in the housing and / or the main body assembly, and the noise reduction structure being located on the noise transmission path of the contact leads and / or the iron core, and capable of absorbing the mechanical noise transmitted by the contact leads and / or the iron core.

[0005] In a preferred embodiment, the noise reduction structure contains a uniformly distributed microbubble structure.

[0006] In a preferred embodiment, the noise reduction structure is a sound-absorbing pad or sound-absorbing cotton, or the noise reduction structure is a noise reduction layer cured by sound-absorbing adhesive; the sound-absorbing adhesive is made of two-component polyurethane.

[0007] In a preferred embodiment, the noise reduction structure is an integral unit and can absorb the mechanical noise transmitted by the contact lead and the iron core.

[0008] In a preferred embodiment, the noise reduction structure surrounds the contact lead and is in close contact with the contact lead; the extension direction of the contact lead is consistent with the axial direction of the iron core, and the noise reduction structure is located on one side of the axial direction of the iron core.

[0009] In a preferred embodiment, one end of the housing is provided with an opening, the main body component and the noise reduction structure enter the housing sequentially through the opening, and the noise reduction structure forms a sealing layer adapted to the opening and provides support and positioning for the main body component; the contact lead extends to the outside of the opening.

[0010] In a preferred embodiment, the contact portion is disposed on the magnetic circuit portion, the magnetic circuit portion further includes a coil frame, the iron core is disposed in the shaft hole of the coil frame, the coil frame and the end of the housing with the opening form a receiving groove for accommodating the noise reduction structure, and the noise reduction structure is in close contact with the coil frame.

[0011] In a preferred embodiment, one end of the shaft hole of the coil frame faces the receiving groove and is filled with insulating sealant, and the iron core contacts the noise reduction structure through the insulating sealant.

[0012] In a preferred embodiment, the contact lead is a stationary spring lead, and there are two of them; the magnetic circuit portion is provided with a plurality of coil leads, which extend to the opening of the housing.

[0013] In a preferred embodiment, one end of the housing is provided with a plurality of support portions spaced apart along its circumference, each support portion extending outward along the axial direction of the opening.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model sets a noise reduction structure on the noise transmission path of the contact lead and / or iron core. The noise reduction structure absorbs the core noise transmitted by the lead and / or iron core, which can greatly reduce the transmission of core noise to the outside, thereby significantly improving the noise performance of the relay and meeting the stringent requirements of new energy electric vehicles for low-noise components. Moreover, this utility model can improve the quietness and driving comfort of the whole vehicle without affecting the electrical performance and reliability of the relay.

[0016] 2. The noise reduction structure features a uniformly distributed microbubble structure, significantly enhancing its noise reduction performance. Specifically, the noise reduction structure preferentially utilizes a noise reduction layer cured with sound-absorbing adhesive. Compared to traditional noise reduction materials, the cured layer not only possesses better flexibility and damping properties but also adheres tightly to the relay structure, achieving superior noise suppression. Furthermore, the material's curing process is simple, facilitating precise control of thickness and shape, ensuring noise reduction performance without compromising the relay's electrical characteristics and mechanical strength. This material selection enhances the product's noise reduction performance while also considering production feasibility and cost control.

[0017] 3. The noise reduction structure is designed as an integrated unit, which can simultaneously absorb the noise transmitted from the contact lead-out foot and the iron core. Compared with the split design, it has higher structural stability and noise reduction efficiency, and simplifies the assembly process.

[0018] 4. The noise reduction structure surrounds the contact lead and is in close contact with the contact lead. The extension direction of the contact lead is consistent with the axial direction of the iron core. The noise reduction structure is located on one side of the axial direction of the iron core, so that the noise reduction structure can effectively block the vibration energy from being transmitted outward through the contact lead and the iron core, thereby significantly reducing the mechanical noise when the relay is working.

[0019] 5. Because the main components and noise reduction structure enter the housing sequentially through the opening, and the noise reduction structure forms a sealing layer adapted to the opening, providing support and positioning for the main components, the noise reduction structure has multiple functions: on the one hand, it effectively absorbs and isolates noise generated by mechanical vibrations inside the relay; on the other hand, it also acts as a limiting and sealing structure, preventing the main components from detaching from the housing. This integrated design, with its multiple uses, not only significantly improves the noise reduction effect but also enhances the product's structural reliability. Furthermore, through functional integration, this structure simplifies the assembly process and optimizes the product's spatial layout. This multi-functional integrated design greatly improves the product's cost-effectiveness and market competitiveness.

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the low-noise relay of the present invention is not limited to the embodiments. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the present invention. Figure 1 ;

[0022] Figure 2 This is a cross-sectional view of the present invention. Figure 2 ;

[0023] Figure 3 This is a bottom view of the present invention;

[0024] In the diagram, 1 is the housing; 11 is the support; 2 is the iron core; 3 is the contact lead; 4 is the noise reduction layer; 5 is the coil frame; 51 is the coil lead; 6 is the insulating sealant; 7 is the yoke; 8 is the armature; 9 is the moving spring; and 10 is the stationary spring. Detailed Implementation

[0025] In the description of this utility model, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0026] Please see Figures 1-3 As shown, this utility model discloses a low-noise relay, including a housing 1 and a main body assembly disposed within the housing 1. The main body assembly includes a contact portion and a magnetic circuit portion. The contact portion has multiple contact leads 3 extending to the outside of the housing 1. The magnetic circuit portion includes a coil frame 5 and an iron core 2, with the iron core 2 disposed in the shaft hole of the coil frame 5. This utility model also includes a noise reduction structure disposed in the housing 1 and / or the main body assembly, and located on the noise transmission path of the contact leads 3 and / or the iron core 2, capable of absorbing the mechanical noise transmitted by the contact leads 3 and / or the iron core 2. The noise transmission path refers to the propagation path and key medium of noise from the source to the final receiver. In this utility model, the relay noise mainly propagates outward through the two core paths of the contact leads 3 and the iron core 2. Therefore, by placing the noise reduction structure on the noise transmission path of the contact leads and / or the iron core 2, the noise reduction structure can achieve a precise and efficient noise suppression effect.

[0027] Preferably, the noise reduction structure contains a uniformly distributed microbubble structure. These microbubbles can progressively absorb sound waves and induce sound wave reflection and interference through the bubble cavities, thereby disrupting noise propagation. In this embodiment, the noise reduction structure is specifically a noise reduction layer 4 formed by curing a sound-absorbing adhesive, preferably a two-component polyurethane. In other embodiments, the noise reduction structure is a sound-absorbing pad or sound-absorbing cotton, etc. Compared with traditional noise reduction materials, the noise reduction layer 4 formed after curing the sound-absorbing adhesive not only has better flexibility and damping performance, but also fits tightly with the relay structure, achieving a better noise suppression effect. At the same time, the curing process of this material is simple, making it easy to accurately control the thickness and shape, ensuring noise reduction performance without affecting the electrical characteristics and mechanical strength of the relay. This material selection improves the noise reduction performance of the product while taking into account production feasibility and cost control.

[0028] In this embodiment, the noise reduction structure is an integrated structure that can simultaneously absorb the mechanical noise transmitted by the contact lead-out foot 3 and the iron core 2. This results in higher structural stability and noise reduction efficiency, and simplifies the assembly process. Specifically, the noise reduction structure is arranged around the contact lead-out foot 3 and is in close contact with its four sides. The extension direction of the contact lead-out foot 3 is consistent with the axial direction of the iron core 2, and the noise reduction structure is located on one side of the axial direction of the iron core 2. Therefore, the noise transmission path of the iron core 2 is located in the axial direction of the iron core 2, and the noise reduction structure is in direct or indirect close contact with the iron core 2 in the axial direction.

[0029] One end of the housing 1 has an opening, through which the main component and the noise reduction structure sequentially enter the housing 1. The contact lead 3 extends out of the opening, and the magnetic circuit includes multiple coil lead 51s, which also extend out of the opening of the housing 1. The noise reduction structure is in close contact with the housing 1 and the main component, forming a sealing layer adapted to the opening of the housing 1 and providing support and positioning for the main component. Therefore, the noise reduction structure of this invention has multiple functions, effectively absorbing and isolating noise generated by internal mechanical vibrations of the relay, and also serving as a limiting and sealing structure to prevent the main component from detaching from the housing 1. This multi-functional integrated design simplifies the assembly process, optimizes product space layout, and significantly improves the product's cost-effectiveness and market competitiveness.

[0030] In this embodiment, the contact portion is located in the magnetic circuit portion. The coil frame 5 and the end of the housing 1 with an opening together form a receiving groove for accommodating the noise reduction structure, and the noise reduction structure is in close contact with the coil frame 5. Therefore, the aforementioned noise-reducing adhesive is filled into the receiving groove. One end of the shaft hole of the coil frame 5 faces the receiving groove and is filled with insulating sealant 6. The iron core 2 contacts the noise reduction structure through the insulating sealant 6. In other embodiments, the main body assembly also includes a base, the contact portion and the magnetic circuit portion are respectively disposed on the base, and the base and the end of the housing with an opening together form the receiving groove.

[0031] The magnetic circuit also includes a yoke 7 and an armature 8. The yoke 7 is L-shaped, with one side inserted into the coil frame 5 and riveted to one end of the iron core 2. The other side is located outside the coil frame 5. The armature 8 is oscillatingly positioned at the blade edge on the other side of the yoke 7 and magnetically engaged with the other end of the iron core 2. The contact part specifically includes a moving spring 9 with a moving contact and a stationary spring 10 with a stationary contact. The moving spring 9 is roughly L-shaped, with one side riveted to the outside of the other side of the yoke 7. The other side of the moving spring 9 is riveted to the armature 8 and has a moving contact. There are two stationary springs 10, each connected to the coil frame 5 by a stationary spring bracket. The stationary contacts on the two stationary springs 10 correspond to the moving contacts on the same moving spring 9, forming a bridge-type contact structure. The contact lead-out pins 3 are specifically stationary spring lead-out pins, and there are two of them. The two contact lead-out pins 3 are connected to the two stationary springs 10 one by one. In other embodiments, the plurality of contact leads 3 described above include moving spring leads and stationary spring leads.

[0032] One end of the housing 1 is provided with a plurality of support portions 11 distributed circumferentially, each support portion 11 extending outward along the axial direction of the opening. Specifically, one end of the housing 1 faces downward, the cross-section of the housing 1 is square, and the four corners of the bottom end of the housing 1 are respectively provided with support portions 11. The entire housing 1 is lifted by the support portions 11, so that after each lead is connected to the PCB board, there is an air gap between the housing 1 and the PCB board, which can be used for heat dissipation.

[0033] This utility model discloses a low-noise relay. During assembly, the main body component is first installed into the housing 1, with the contact lead 3 and coil lead 51 extending to the outside of the opening of the housing 1. Then, noise-reducing adhesive is poured into the receiving groove formed between the coil frame 5 and one end of the housing 1. After the noise-reducing adhesive solidifies, a noise-reducing layer 4 is formed. This noise-reducing layer 4 wraps around each lead and is tightly bonded to the inner wall of one end of the housing 1 and the side of the coil frame 5 facing the noise-reducing layer 4. This cleverly achieves the dual functions of sealing protection and mechanical fixation: on the one hand, the tight fit forms a sealing barrier, effectively preventing moisture, dust, etc. from entering the interior through the gap between the housing 1 and the coil frame 5; on the other hand, it provides stable support and positioning for the main body component, maintaining stability even under severe vibration and impact conditions.

[0034] The noise reduction layer 4 of this invention absorbs the mechanical noise transmitted by the contact lead-out foot 3 by tightly wrapping it, thus blocking the propagation path of vibration waves along the contact lead-out foot 3. At the same time, the noise reduction layer 4 completely covers the iron core 2 and the vibration radiation surface transmitted to the coil frame 5, effectively absorbing the mechanical noise transmitted by the iron core 2, thereby blocking the outward radiation of sound waves.

[0035] Therefore, this utility model achieves optimal noise reduction effect with minimal modifications by precisely intercepting the main noise transmission path, perfectly meeting the dual requirements of new energy vehicles for low noise and high reliability of relays.

[0036] The present invention relates to a low-noise relay, and the parts not described herein are the same as or can be implemented using existing technologies.

[0037] The above embodiments are only used to further illustrate a low-noise relay of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A low noise relay comprising a housing and a main assembly disposed within the housing, the main assembly comprising a contact portion and a magnetic circuit portion, the contact portion being provided with a plurality of contact lead-out pins, the contact lead-out pins extending to the outside of the housing, the magnetic circuit portion comprising a core; characterized in that: It also includes a noise reduction structure disposed on the housing and / or main body assembly, and the noise reduction structure is located on the noise transmission path of the contact lead and / or iron core, and can absorb the mechanical noise transmitted by the contact lead and / or iron core.

2. The low noise relay of claim 1, wherein: The noise reduction structure contains a uniformly distributed microbubble structure.

3. The low noise relay of claim 2, wherein: The noise reduction structure is a sound-absorbing pad or sound-absorbing cotton, or the noise reduction structure is a noise reduction layer formed by curing a sound-absorbing adhesive; the sound-absorbing adhesive is made of two-component polyurethane.

4. The low noise relay of claim 1, wherein: The noise reduction structure is an integral unit and can absorb the mechanical noise transmitted by the contact lead and the iron core.

5. The low noise relay of claim 4, wherein: The noise reduction structure is arranged around the contact lead and is in close contact with the contact lead; the extension direction of the contact lead is consistent with the axial direction of the iron core, and the noise reduction structure is located on one side of the axial direction of the iron core.

6. A low noise relay according to any one of claims 1-5, characterized in that: One end of the housing is provided with an opening, and the main component and the noise reduction structure enter the housing sequentially through the opening. The noise reduction structure forms a sealing layer adapted to the opening and provides support and positioning for the main component. The contact lead extends out of the opening.

7. The low noise relay of claim 6, wherein: The contact portion is located in the magnetic circuit portion, which also includes a coil frame. The iron core is located in the shaft hole of the coil frame. The coil frame and the end of the housing with the opening form a receiving groove for accommodating the noise reduction structure, and the noise reduction structure is in close contact with the coil frame.

8. The low noise relay of claim 7, wherein: One end of the shaft hole of the coil frame faces the receiving groove and is filled with insulating sealant, and the iron core contacts the noise reduction structure through the insulating sealant.

9. The low noise relay of claim 7, wherein: The contact lead is a stationary spring lead, and there are two of them; the magnetic circuit part is provided with multiple coil leads, which extend to the outside of the opening of the housing.

10. The low noise relay of claim 7, wherein: One end of the housing is provided with a plurality of support portions spaced apart along its circumference, each support portion extending outward along the axial direction of the opening.

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