KR20160003652U - Noise reducing apparatus for Relay of Electric Vehicle - Google Patents

Noise reducing apparatus for Relay of Electric Vehicle Download PDF

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Publication number
KR20160003652U
KR20160003652U KR2020150002364U KR20150002364U KR20160003652U KR 20160003652 U KR20160003652 U KR 20160003652U KR 2020150002364 U KR2020150002364 U KR 2020150002364U KR 20150002364 U KR20150002364 U KR 20150002364U KR 20160003652 U KR20160003652 U KR 20160003652U
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KR
South Korea
Prior art keywords
contact
noise
electric vehicle
relay
movable
Prior art date
Application number
KR2020150002364U
Other languages
Korean (ko)
Inventor
이수정
Original Assignee
엘에스산전 주식회사
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Filing date
Publication date
Application filed by 엘에스산전 주식회사 filed Critical 엘에스산전 주식회사
Priority to KR2020150002364U priority Critical patent/KR20160003652U/en
Publication of KR20160003652U publication Critical patent/KR20160003652U/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/023—Details concerning sealing, e.g. sealing casing with resin
    • B60L11/1809—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2270/00—Problem solutions or means not otherwise provided for
    • B60L2270/10—Emission reduction
    • B60L2270/14—Emission reduction of noise

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

The present invention relates to a noise reducing device for a relay for an electric vehicle, and according to the noise reduction device for an electric vehicle relay, a contact spring which is provided between the movable contact and the shaft is wrapped around and the one end is brought into close contact with the movable contact, And a sound-isolating tube provided between the shaft and the stationary core to prevent the noise generated between the shaft and the stationary core from being diverted to the outside, thereby minimizing bass noises. In addition, when the contact pressure of the movable contact to the stationary contact is increased to reduce the electrical contact resistance between the stationary contact and the movable contact, a noise generated between the shaft and the stationary core becomes larger using a contact spring having a high elastic force It is possible to provide a relay for an electric vehicle in which electric contact resistance between the stationary contact and the movable contact is minimized by using a contact spring having a large elastic force as a result. Therefore, the noise reduction device of the relays for electric vehicles according to the present invention can improve both the on and off performance required for relays for electric vehicles and the sensitivity quality required for electric vehicles in recent years.

Description

[0001] The present invention relates to a relay for an electric vehicle having a noise reduction device,

The present invention relates to a relay for an electric vehicle equipped with a noise reduction device, and more particularly to a relay for an electric vehicle provided with a noise reducing device, To a relay for an electric vehicle provided with a noise reducing device capable of suppressing divergence of noise to reduce bass noises.

Generally, electric vehicles such as hybrid cars, fuel cell cars, golf carts and electric forklifts are used for electric vehicle relays to supply and cut off the electric power of the battery to the power generating device and electric power source Such an electric vehicle relay is one of the key components of an electric vehicle.

1 is a longitudinal sectional view of a relay for an electric vehicle according to the prior art. Fig. 2 shows the state of the closed state (at the time of the ON operation), and Fig. 3 shows the state of the shutoff state (at the time of the blocking operation).

The configuration of a relay for an electric vehicle according to the related art includes a stationary contact 2 fixedly installed on one side of the frame 1; A movable contact (3) installed to be able to contact or separate from the fixed contact (2); An actuator 4 installed on the other side of the frame 1 and linearly moving the movable contact 3; And a contact spring (5) for securing a contact pressure of the movable contact (3).

The actuator 4 includes a coil 4a for generating a magnetic force, a stationary core 4b fixedly installed in the coil 4a, and a movable core 4b disposed linearly movably in the coil 4a. A shaft 4d coupled to the movable core 4c and coupled to the movable contact 3 at a distal end thereof and a shaft 4d coupled between the fixed core 4b and the movable core 4c, 4c in the direction away from the fixed core 4b. Here, the shaft 4d is guided so as to be linearly moved by a shaft guide hole 4f formed at the center of the fixed core 4b.

The contact spring 5 is inserted between the support portion 4g formed on the shaft 4d and the movable contact 3 to apply a spring force to the movable contact 3 against the fixed contact 2 due to the elastic force, to be. As the contact pressure spring 5, a compression coil spring is used.

Hereinafter, the operation of the relays for electric vehicles according to the prior art will be described. A strong magnetic force is generated in the fixed core 4b by the magnetic field generated around the coil 4a when the power is applied to the coil 4a so that the movable core 4c and the shaft 4d coupled thereto are fixed And is sucked into the core 4b. Thus, the movable contact 3 coupled to the shaft 4d comes into contact with the stationary contact 2 and is maintained in the ON state for supplying power to the power generating device and the battery.

When the power applied to the coil 4a is cut off, the magnetic field generated around the coil 4a disappears and the movable core 4c and the shaft 4d coupled thereto are moved downward by the return spring 4e And the movable contact 3 coupled to the shaft 4d is disconnected from the stationary contact 2 and is switched to the off state for interrupting the supply of battery power to the power generating device and the electric charger.

In the relays for an electric vehicle according to the related art, noises (A 'portion in FIG. 2) between the stationary contact 2 and the movable contact 3 and between the stationary core 4b and the movable core 3 (The 'B' portion in FIG. 2) occurs between the support portion 4g of the shaft 4d and the fixed core 4b during the off operation, ).

In recent years, as the capacity of the relay is increased, the contact spring 5 has a tendency to use a product having a high elastic force to increase the contact force between the stationary contact 2 and the movable contact 3 during closing operation. The collision noise between the support portion 4g of the fixed core 4d and the fixed core 4b is further increased.

In the relays for electric vehicles according to the related art, such noise is caused by a structural problem, but there are few measures against it, and the noise problem has been considered recently because the importance of the sensitivity quality of the automobile is emphasized This is a part that can not be overlooked.

Therefore, the object of the present invention is to provide a noise suppression device capable of suppressing divergence of noise generated during operation of an electric vehicle relay while using a contact spring having a high elastic force to increase the contact pressure between the fixed contact and the movable contact, And to provide a relay for an electric vehicle provided with a reduction device.

An electric vehicle relay equipped with a noise reduction device according to an embodiment of the present invention includes a frame having a bottom open; A stationary contact fixedly installed on one side of the frame; A movable contact which is installed at a lower portion of the fixed contact so as to be linearly movable and can be brought into contact with or separated from the fixed contact; A fixed core provided at a lower portion of the movable contact; a movable core linearly movably installed at a lower portion of the fixed core; and a shaft having an upper end coupled to the movable contact and a lower end coupled to the movable core, An actuator for linearly moving the contact; A contact spring installed between the movable contact and the shaft; And a noise blocking tube surrounding the contact spring and having an upper end fixed to the movable contact and a lower end fixed to the fixed core.

Here, the noise-isolating tube may be formed of silicon or a soft rubber.

Further, the noise-isolating tube may be formed as a corrugated tube.

The apparatus further includes a plate provided between the frame and the actuator, and a frame cover sealing the lower surface of the frame.

Further, a flange is formed on upper and lower ends of the noise-isolating tube.

Further, the noise-isolating tube may be formed in a convex jar shape or a constricted rectangular shape.

According to the relay for an electric vehicle provided with the noise reducing device of the present invention, there is provided a noise shielding tube which surrounds the contact spring installed between the movable contact and the shaft, one end of which is brought into close contact with the movable contact and the other end is in close contact with the fixed core, The noise generated between the shaft and the fixed core is prevented from being diverted to the outside, so that the bass noise can be minimized.

In addition, when a contact spring having a large elastic force is used to increase the contact pressure of the movable contact to the fixed contact to reduce the electrical contact resistance between the fixed contact and the movable contact, the noise generated between the shaft and the fixed core becomes larger In this case as well, it is possible to cut off by the noise shielding tube, so that the contact spring having a large elastic force can be used.

Therefore, the electric vehicle relay equipped with the noise reduction device according to the present invention can improve on and off performance required for electric vehicle relays and the sensitivity quality required for electric vehicles in recent years.

1 is a longitudinal sectional view of a relay for an electric vehicle according to the prior art.
2 is a longitudinal sectional view of a relay for an electric vehicle according to the prior art. It is in the state of closing (on operation).
3 is a longitudinal sectional view of a relay for an electric vehicle according to the prior art. (Blocking operation).
4 is a longitudinal sectional view of a relay for an electric vehicle to which the noise reducing device according to one embodiment of the present invention is applied.
5 is a perspective view of a noise isolation tube according to an embodiment of the present invention.
6 is a front view of a noise isolation tube according to another embodiment of the present invention.
7 is a front view of a noise isolation tube according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to illustrate the present invention in such a manner that a person skilled in the art can easily carry out the present invention. And does not mean that the technical idea and category of the design is limited.

FIG. 4 is a vertical sectional view of a relay for an electric vehicle to which the noise reduction device according to an embodiment of the present invention is applied, and FIG. 5 is a perspective view of a noise isolation tube according to an embodiment of the present invention. The relay for an electric vehicle to which the noise reduction device according to one embodiment of the present invention is applied will be described in detail with reference to the drawings.

The relay for an electric vehicle to which the noise reduction device according to an embodiment of the present invention is applied includes a frame 11 with a bottom opened; A stationary contact 12 fixed to one side of the frame 11; A movable contact 13 installed to be linearly movable below the fixed contact 12 and capable of being contacted with or separated from the fixed contact 12; A fixed core 22 installed at a lower portion of the movable contact 13, a movable core 23 installed at a lower portion of the fixed core 22 so as to be linearly movable, an upper end coupled to the movable contact 13, An actuator (20) including a shaft (24) whose lower end is coupled to the movable core (23) and linearly moving the movable contact (13); A contact spring (30) installed between the movable contact (13) and the shaft (24); And a noise isolation tube 40 surrounding the contact spring 30 and having an upper end fixed to the movable contact 13 and a lower end fixed to the stationary core 22.

The frame 11 is formed in a box-like shape with a bottom open, and is installed on the top of the electric vehicle relay.

The fixed contacts 12 are fixed to the frame 11 in a pair. One of the fixed contacts 12 is connected to the power source side and the other of the fixed contacts 12 is connected to the load side.

The movable contact 13 may be formed as a flat plate 15a having a predetermined length and contacted with the pair of fixed contacts 11. The movable contact 13 can be linearly moved upward and downward by the actuator 20 and can be brought into contact with or separated from the fixed contact 12.

The actuator 20 includes a coil 21 that receives external power to form a magnetic field, a stationary core 22 that is fixedly installed inside the coil 21 to generate a magnetic force, A shaft 24 whose lower end is coupled to the movable core 23 and whose upper end is coupled to the movable contact 13 and a movable core 23 which is coupled to the fixed core 22 and the movable core 23, And a return spring 25 provided between the movable core 23 and the movable core 23 to return the movable core 23 downward.

The shaft 24 can linearly move in the vertical direction within the shaft guide hole 22a formed at the center of the fixed core 22. [

The contact pressure spring 30 is a spring that is inserted between the movable contact 13 and a supporting portion 24a protruding from a part of the shaft 24 and applies a contact pressure to the fixed contact 12 by an elastic force. As the contact pressure spring 30, a compression coil spring can be used.

A plate (26) is provided between the actuator (20) and the frame (11). The plate 26 may be formed of an iron material to form a magnetic circuit or may serve as a support plate on which the upper frame 11 and the lower actuator 20 are hermetically sealed.

On the upper part of the plate 26, a frame cover 27 may be provided for sealing the frame 11.

The noise isolation tube 40 surrounds the contact spring 30 and has both ends thereof fixedly fixed to the fixed core 22 and the movable contact 13, respectively. The noise isolation tube 40 suppresses the diffusion of the contact noise between the support portion 24a of the shaft 24 and the fixed core 22 so that the diffusion of the noise generated during the operation of the relay can be minimized.

The noise-isolating tube 40 is preferably made of a tube having excellent stretchability. Silicone, soft rubber, or soft synthetic resin may be used as a material having excellent stretchability.

Further, it is preferable that the noise-isolating tube 40 is formed in the form of a corrugated tube 41 in order to enhance the stretchability.

The upper end of the noise-isolating tube 40 may be in close contact with the lower surface of the movable contact 13 due to its own elasticity, and the lower end thereof may be in close contact with the upper surface of the stationary core 22.

When the electric power is applied to the coil 21, the electric motor vehicle relays to which the noise reduction device according to the present invention is applied have the fixed core 22 magnetized by the magnetic field generated around the coil 21, 23 and the shaft 24 coupled thereto move upward and the movable contact 13 coupled to the shaft 24 comes into contact with the stationary contact 12 to be closed.

When the power applied to the coil 21 is cut off, the magnetic field generated around the coil 21 disappears and the movable core 13 and the shaft 24 coupled thereto are returned downward by the return spring 25 And the movable contact 13 coupled to the shaft 24 is disconnected from the stationary contact 12 and the circuit is shut off.

The relay for an electric vehicle provided with the noise reducing device of the present invention includes a noise shielding tube 40 so as to prevent the noise generated in the above-described blocking operation from being diverted to the outside, thereby minimizing bass noises.

That is, in the process of cutting off, a collision noise is generated between the support portion 24a of the shaft 24 and the fixed core 22, and the contact spring 30 is wrapped around the contact spring 30 so that one end is in close contact with the movable contact 13, Since the noise shielding tube 40 adhered to the shaft 22 is provided to prevent the noise generated between the support portion 24a of the shaft 24 and the fixed core 22 from being diverted to the outside, It will be.

A contact spring 30 having a large elastic force is used to increase the contact pressure of the movable contact 13 with respect to the fixed contact 12 and to reduce the electrical contact resistance between the fixed contact 12 and the movable contact 13 The noise generated between the support portion 24a of the shaft 24 and the fixed core 22 is further increased. In this case, the noise can be blocked by the noise isolation tube 40, and as a result, . ≪ / RTI >

Therefore, the electric vehicle relay equipped with the noise reduction device according to the present invention can improve on and off performance required for electric vehicle relays and the sensitivity quality required for electric vehicles in recent years.

6 is a front view of a noise isolation tube applied to another embodiment of the present invention.

In this embodiment, flange portions 43 are formed at the upper and lower ends of the noise-isolating tube 42 so that the lower surface of the noise-isolating tube 42 and the movable contact 13, the noise- ) Can be improved.

When the flange portion 43 is formed on the upper and lower ends of the noise isolating tube 42, the lower surface of the movable contact 13 and the upper surface of the plate 26 are screwed to each other by screws passing through the flange portion 43 It can be bonded by an adhesive.

7 is a front view of a noise isolation tube applied to another embodiment of the present invention.

In this embodiment, the noise isolation tube 44 may be formed as a bulb shape whose middle portion is convex or an elongated shape whose middle portion is constricted. Since the middle portion of the noise cancellation tube 44 is formed into an elongated bulb shape or a long bulb shape in which the middle portion is folded, the noise acceptance performance is improved.

Also in this case, the flange 45 may be formed at the upper and lower ends of the noise-isolating tube 44 so that the lower surface of the movable contact 13 and the upper surface of the fixed core 22 can be tightly fixed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the technical idea of the present invention, and the scope of technical idea of the present invention is not limited by these embodiments. That is, the scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of the same shall be construed as being included in the scope of the present invention.

11: Frame 12: Fixed contact
13: movable contact 20: actuator
21: coil 22: fixed core
23: movable core 24: shaft
25: return spring 26: plate
27: Frame cover 30: Contact spring
40: Noise-isolating tube

Claims (6)

This open frame;
A stationary contact fixedly installed on one side of the frame;
A movable contact which is installed at a lower portion of the fixed contact so as to be linearly movable and can be brought into contact with or separated from the fixed contact;
A fixed core provided at a lower portion of the movable contact; a movable core linearly movably installed at a lower portion of the fixed core; and a shaft having an upper end coupled to the movable contact and a lower end coupled to the movable core, An actuator for linearly moving the contact;
A contact spring installed between the movable contact and the shaft;
And a noise shielding tube surrounding the contact spring and having an upper end fixed to the movable contact and a lower end fixed to the fixed core. The relay for an electric vehicle according to claim 1, wherein the noise cancellation tube is made of silicone or soft rubber. The electric vehicle relay according to claim 1, wherein the noise cancellation tube is formed in a corrugated pipe shape. The electric vehicle relay according to claim 1, further comprising: a plate provided between the frame and the actuator; and a frame cover sealing the lower surface of the frame. The relay for an electric vehicle according to claim 1, wherein a flange is formed on upper and lower ends of the noise-isolating tube. The relay for an electric vehicle according to claim 1, wherein the noise cancellation tube is formed in a convex jar shape or a constricted rectangular shape.
KR2020150002364U 2015-04-13 2015-04-13 Noise reducing apparatus for Relay of Electric Vehicle KR20160003652U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2020150002364U KR20160003652U (en) 2015-04-13 2015-04-13 Noise reducing apparatus for Relay of Electric Vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2020150002364U KR20160003652U (en) 2015-04-13 2015-04-13 Noise reducing apparatus for Relay of Electric Vehicle

Publications (1)

Publication Number Publication Date
KR20160003652U true KR20160003652U (en) 2016-10-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR2020150002364U KR20160003652U (en) 2015-04-13 2015-04-13 Noise reducing apparatus for Relay of Electric Vehicle

Country Status (1)

Country Link
KR (1) KR20160003652U (en)

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