CN112908783A - Mute type high-voltage direct-current contactor - Google Patents

Abstract

The invention discloses a mute type high-voltage direct current contactor, which comprises: the coil is arranged in the yoke shell and sleeved outside the iron core assembly, the iron core assembly comprises a static iron core and a movable iron core, the static iron core is fixedly arranged on the magnetic conductive plate, and the movable iron core is positioned below the static iron core and can move up and down relative to the static iron core; move the iron core top and set up actuation portion, actuation portion has magnetism and feels line dispersion plane, quiet iron core bottom structure match in actuation portion, move the iron core orientation quiet iron core removes, magnetism is felt the line by magnetism is felt line dispersion plane and is dispersed. The invention provides a mute high-voltage direct-current contactor, which effectively reduces the noise when the contactor is closed and disconnected, achieves the mute effect and increases the use comfort of users.

Description

Mute type high-voltage direct-current contactor

Technical Field

The invention relates to the field of contactors, in particular to a mute high-voltage direct-current contactor.

Background

With the development of new energy automobiles, the riding comfort of the electric vehicle is more and more important under the condition of meeting basic functions, and when the automobile is started and closed, the comfort of passengers is directly influenced by the size of the starting and closing sound of the automobile. With the implementation of the national standard for vehicle noise, the noise of the passenger vehicle is currently controlled within a certain range to reduce the influence of the noise. According to the NB/T10330-2019, the noise value of the contactor is definitely less than or equal to 60dB according to the standard of the DC contactor for the electric automobile. Therefore, it is important to control the noise of the contactor.

The working principle of the high-voltage direct-current contactor is generally as follows: after the coil is electrified, the movable iron core and the push rod move upwards under the action of the magnetic field, so that the movable contact piece is in contact conduction with the static contact. The existing high-voltage direct-current contactor is characterized in that when a movable iron core moves to be in contact with a static iron core, the movable iron core and the static iron core are made of electric iron DT4E generally due to the consideration of reasons such as magnetic resistance, the collision mode between the movable iron core and the static iron core belongs to rigid collision, and the magnetic force borne by the movable iron core is larger as the magnetic gap is reduced, so that after the movable iron core runs out of all the magnetic gaps, the magnetic force borne by the movable iron core is the largest, and the movable iron core and the static iron core can generate large impact sound after collision. Meanwhile, when the movable iron core moves upwards, the push rod moves upwards along with the movable iron core as the push rod is welded with the movable iron core, and when the coil is released due to loss of power, the push rod and the static iron core impact each other; in a similar way, when the movable iron core is released, the movable iron core collides with the shell under the action of the return spring to generate great noise.

Disclosure of Invention

In order to solve the technical problem, the invention provides a mute high-voltage direct current contactor which can effectively reduce the noise when the contactor is closed and disconnected.

The technical scheme adopted by the invention for solving the technical problem is as follows: a mute type high voltage dc contactor comprising: the coil is arranged in the yoke shell and sleeved outside the iron core assembly, the iron core assembly comprises a static iron core and a movable iron core, the static iron core is fixedly arranged on the magnetic conductive plate, and the movable iron core is positioned below the static iron core and can move up and down relative to the static iron core; move the iron core top and set up actuation portion, actuation portion has magnetism and feels line dispersion plane, quiet iron core bottom structure match in actuation portion, the during operation move the iron core orientation quiet iron core removes, magnetism is felt the line by magnetism feels line dispersion plane and disperses.

As a further improvement of the invention, the section of the attraction part is trapezoidal or is provided with a trapezoidal groove at the top of the movable iron core, and the magnetic induction line dispersion surface is an inclined side edge of the attraction part.

As a further improvement of the invention, the iron core assembly further comprises a push rod, the push rod penetrates through the static iron core and is fixedly connected with the movable iron core, a limiting clamping table positioned in the static iron core is arranged on the push rod, and a buffer structure matched with the limiting clamping table for use is arranged between the static iron core and the magnetic conduction plate.

As a further improvement of the present invention, the buffer structure includes a fixed plate and a buffer pad which are mounted on the top of the stationary core and fixedly connected to the magnetic conductive plate, the buffer pad is mounted between the fixed plate and the stationary core, and the push rod moves upward to make the limit clamping table abut against the buffer pad.

As a further improvement of the invention, the top of the static iron core extends outwards to form an annular boss, the cushion pad covers the annular boss and the top of the static iron core, and the magnetic conduction plate is matched with the annular boss to press the cushion pad.

As a further improvement of the present invention, the fixing plate is an elastic sheet having an elastic deformation force, and the fixing plate and the magnetic conductive plate are fixedly connected by welding.

As a further improvement of the invention, a stroke limiting groove for limiting the sliding of the clamping table is arranged in the static iron core, a first silencing assembly is arranged at the bottom of the stroke limiting groove, and the first silencing assembly comprises an upper gasket and an upper copper sheet arranged at the top of the upper gasket.

As a further improvement of the invention, a second silencing assembly is mounted below the movable iron core, and the second silencing assembly comprises a lower gasket and a lower copper sheet mounted on the top of the lower gasket.

As a further improvement of the invention, the device also comprises a ceramic shell arranged on the top of the magnetic conduction plate and two fixed contacts arranged on the ceramic shell at intervals, an arc extinguish chamber is formed between the ceramic shell and the magnetic conduction plate, and the top end of the push rod extends into the arc extinguish chamber and is provided with a movable contact.

As a further improvement of the invention, the stationary iron core and the movable iron core are oppositely provided with a spring accommodating groove, a return spring is arranged in the spring accommodating groove, and the return spring is sleeved on the push rod.

The invention has the beneficial effects that:

1. the invention provides a mute high-voltage direct-current contactor, wherein a suction part with a magnetic induction line dispersion surface is arranged at the top of a movable iron core, and in the process that the movable iron core is close to a static iron core, magnetic induction lines are dispersed by the magnetic induction line dispersion surface, so that the magnetic induction lines are effectively reduced, the force borne by the movable iron core is not increased along with the reduction of a magnetic gap, the impact force can be greatly reduced, and the noise generated when the movable iron core and the static iron core are absorbed is effectively reduced;

2. the buffer structure matched with the limit clamping table of the push rod is arranged between the static iron core and the magnetic conduction plate, when the movable iron core drives the push rod to move upwards and is about to be absorbed with the static iron core, the buffer cushion and the elastic fixed plate are matched with the limit clamping table to play a buffer role on the movable iron core, and the noise generated when the movable iron core is absorbed with the static iron core is further reduced;

3. the upper gasket and the upper copper sheet are arranged in the stroke limiting groove of the static iron core, and the impact on the static iron core is buffered when the push rod is reset through the upper copper sheet and the upper gasket, so that the noise is reduced; the lower copper sheet and the lower gasket are arranged below the movable iron core, so that the impact on the bottom in the metal shell body is buffered when the movable iron core is reset through the lower copper sheet and the lower gasket, and the noise is further reduced; meanwhile, the oxygen-free copper sheet is arranged on the gasket, so that the transmission path of sound waves, namely noise, can be changed, and the gasket can be prevented from being damaged;

4. according to the invention, the noise reduction structures are arranged at the positions generating noise in the high-voltage direct-current contactor, so that the noise generated by collision of the movable iron core and the static iron core, collision of the push rod with the static iron core during resetting and collision of the movable iron core with the bottom of the metal shell during resetting can be effectively reduced, the mute effect is achieved, the noise standard of the contactor is met, and the use comfort of a user is improved.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is an enlarged view of A of FIG. 1 according to the present invention;

FIG. 3 is a cross-sectional view of the lower portion of the present invention;

FIG. 4 is a cross-sectional view of an iron core assembly of the present invention;

FIG. 5 is a cross-sectional view of the movable core assembly during the attraction process according to the present invention;

FIG. 6 is a cross-sectional view of a stationary core and a cushion pad of the present invention;

FIG. 7 is a perspective view of an upper gasket and upper copper sheet of the present invention;

in fig. 3 and 5, the direction indicated by the arrow is the magnetic induction line direction.

The following description is made with reference to the accompanying drawings:

1-yoke shell; 2-magnetic conductive plate;

3-coil; 4-static iron core;

401 — annular boss; 402-stroke limiting groove;

5-movable iron core; 501-attracting part;

5011-magnetic induction line dispersion plane; 6-push rod;

601-limit clamping table; 7-fixed plate;

8-buffer cushion; 9-upper gasket;

10-upper copper sheet; 11-lower gasket;

12-lower copper sheet; 13-ceramic shell;

14-static contact; 15-moving contact piece;

16-return spring.

Detailed Description

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 7, the present invention provides a mute type high voltage direct current contactor, including: yoke casing 1, magnetic conductive plate 2, coil 3 and the iron core subassembly of fixing on yoke casing 1, yoke casing 1 is open-topped U-shaped, and magnetic conductive plate 2 welds at the open-topped position of yoke casing 1. The iron core assembly is installed between the yoke shell 1 and the magnetic conduction plate 2, and the coil 3 is installed in the yoke shell 1 and sleeved outside the iron core assembly. The iron core subassembly includes metal casing body, quiet iron core 4, moves iron core 5 and push rod 6, metal casing body bottom and yoke iron casing 1 fixed connection, and metal casing body open-top has the flanging, and flanging fixed connection is in 2 bottoms of magnetic conduction board. Quiet iron core 4 fixed mounting is in the metal shell and with the welding of magnetic conduction board 2, moves iron core 5 movable mounting and is located quiet iron core 4 below in the metal shell, and 6 bottoms of push rod run through quiet iron core 4 and move iron core 5 fixed connection, move iron core 5 quiet iron core 4 relatively and reciprocate.

Referring to fig. 1, the mute-type high-voltage direct-current contactor further includes a ceramic shell 13 mounted on the top of the magnetic conductive plate 2 and two fixed contacts 14 mounted on the ceramic shell 13 at intervals, an arc extinguishing chamber is formed between the ceramic shell 13 and the magnetic conductive plate 2, the bottom ends of the two fixed contacts 14 are located in the arc extinguishing chamber, and the top end of the push rod 6 extends into the arc extinguishing chamber and is mounted with a movable contact 15. After the coil 3 is electrified, the movable iron core 5 drives the push rod 6 to move upwards under the action of the magnetic field, and the push rod 6 drives the movable contact piece 15 to be in contact conduction with the two fixed contacts 14.

Referring to fig. 5, the bottom of the stationary iron core 4 and the top of the movable iron core 5 are both provided with a spring receiving groove, a return spring 16 is installed in the spring receiving groove, the return spring 16 is sleeved on the push rod 6, the return spring 16 always has downward elastic force on the movable iron core 5, and when the coil 3 is powered off, the movable iron core 5 is restored to an initial position under the elastic force of the return spring 16.

Referring to fig. 3 to 5, the top of the movable iron core 5 is provided with a suction portion 501, the section of the suction portion 501 is trapezoidal, the suction portion 501 has a line-of-magnetic-induction dispersion plane 5011, the line-of-magnetic-induction dispersion plane 5011 is an oblique side of the suction portion 501, and the bottom of the stationary iron core 4 is structurally matched with the suction portion 501. When the magnetic induction type magnetic resonance imaging device works, after the coil 3 is electrified, a magnetic circuit is formed by the magnetic conduction plate 2, the yoke shell 1, the movable iron core 5 and the static iron core 4, a magnetic gap is formed between the movable iron core 5 and the static iron core 4, the movable iron core 5 moves upwards towards the static iron core 4 under the action of a magnetic field, and in the process that the movable iron core 5 is close to the static iron core 4, magnetic induction lines are dispersed by the magnetic induction line dispersing surfaces 5011, namely, part of the magnetic induction lines are inclined towards two sides from vertical upwards, because the total amount of the magnetic induction lines generated by the coil 3 is certain, the dispersion amount of the magnetic induction lines is increased along with the reduction of the magnetic gap, effective magnetic induction lines are reduced, the force borne by the movable iron core 5 cannot be increased along with the reduction of the magnetic gap, when the movable iron core 5 is attracted with the static iron core 4, the impact force can be.

The attracting portion 501 may also be a trapezoidal groove opened at the top of the movable iron core 5 and having an inverted trapezoidal cross section, and at this time, the bottom structure of the stationary iron core 4 is an inverted trapezoidal shape matched with the movable iron core. Alternatively, the suction portion 501 may have another shape, and it is sufficient that the magnetic induction line dispersion surface 5011 has magnetic induction lines dispersed by the magnetic induction line dispersion surface 5011.

Referring to fig. 2 and 6, the push rod 6 is provided with a limit block 601 located in the stationary core 4, the stationary core 4 is provided with a stroke limit groove 402, and the limit block 601 slides in the stroke limit groove 402. When the movable iron core 5 is released, the movable iron core 5 can be effectively prevented from deforming due to the fact that the movable iron core 5 is impacted on the bottom of the metal shell body and is clamped on the stroke limiting groove 402 through the limiting clamping table 601, and the service life is prolonged. Install between quiet iron core 4 and the magnetic conduction board 2 and cooperate the buffer structure who uses with spacing ka tai 601, buffer structure including install 4 tops of quiet iron core and with 2 fixed connection's of magnetic conduction board fixed plate 7 and cushion 8, cushion 8 installs between fixed plate 7 and quiet iron core 4, 4 tops of quiet iron core extend towards outside and form annular boss 401, 8 cladding annular bosses 401 of cushion and 4 tops of quiet iron core, magnetic conduction board 2 cooperation annular boss 401 compresses tightly cushion 8. The fixed plate 7 is an elastic sheet with elastic deformation force, and the fixed plate 7 is fixedly connected with the magnetic conduction plate 2 in a welding mode. The cushion pad 8 is fixed by the matching of the fixing plate 7, the annular boss 401 and the magnetic conduction plate 2, and the cushion pad 8 is made of soft rubber (such as silica gel). When moving iron core 5 and driving push rod 6 and upwards removing, when will with quiet iron core 4 actuation, spacing ka tai 601 supports and leans on blotter 8, plays the cushioning effect to moving iron core 5 through blotter 8 and have elastic fixed plate 7 cooperation spacing ka tai 601, and the effectual reduction moves the noise that produces when iron core 5 and quiet iron core 4 actuation.

Referring to fig. 2 and 7, a first silencing assembly is mounted at the bottom of the stroke limiting groove 402, the first silencing assembly includes an upper gasket 9 and an upper copper sheet 10 mounted at the top of the upper gasket 9, the upper gasket 9 is made of a soft rubber material (such as silica gel), and the upper copper sheet 10 is an oxygen-free copper sheet. After the coil 3 is powered off, the movable iron core 5 drives the push rod 6 to move downwards synchronously under the elastic action of the reset spring 16, so that the limiting clamping table 601 is abutted to the upper copper sheet 10, the impact of the push rod 6 on the static iron core 4 is buffered through the upper copper sheet 10 and the upper gasket 9, and the noise is reduced.

Referring to fig. 4, a second silencing assembly is installed below the movable iron core 5, the second silencing assembly is fixed at the bottom inside the metal shell, the second silencing assembly comprises a lower gasket 11 and a lower copper sheet 12 installed at the top of the lower gasket 11, the lower gasket 11 is made of a soft rubber material (such as silica gel), and the lower copper sheet 12 is an oxygen-free copper sheet. When the coil 3 is powered off, the movable iron core 5 moves downwards under the action of the elastic force of the return spring 16, and the impact of the movable iron core 5 on the bottom in the metal shell is buffered through the lower copper sheet 12 and the lower gasket 11, so that the noise is reduced.

Wherein, through installing copper sheet 10 on last gasket 9, installing copper sheet 12 down on the gasket 11 down, the oxygen-free copper sheet not only can change the propagation path of sound wave noise promptly, and the longitudinal wave that produces the noise when will moving iron core 5 releases passes through diffuse reflection refraction to different directions, can prevent push rod 6 or moving iron core 5 to reset at every turn and strike repeatedly and lead to upper gasket 9 and gasket 11 to produce the damage down.

Therefore, the mute high-voltage direct-current contactor has the advantages that the attraction part with the magnetic induction line dispersion surface is arranged at the top of the movable iron core, so that the magnetic induction lines are dispersed by the magnetic induction line dispersion surface in the process that the movable iron core is close to the static iron core, the magnetic induction lines are effectively reduced, the force borne by the movable iron core cannot be increased along with the reduction of the magnetic gap, the impact force can be greatly reduced, and the noise generated when the movable iron core and the static iron core are attracted is effectively reduced; the buffer structure matched with the limit clamping table of the push rod is arranged between the static iron core and the magnetic conduction plate, when the movable iron core drives the push rod to move upwards and is about to be absorbed with the static iron core, the buffer cushion and the elastic fixed plate are matched with the limit clamping table to play a buffer role on the movable iron core, and the noise generated when the movable iron core is absorbed with the static iron core is further reduced; the upper gasket and the upper copper sheet are arranged in the stroke limiting groove of the static iron core, and the impact on the static iron core is buffered when the push rod is reset through the upper copper sheet and the upper gasket, so that the noise is reduced; the lower copper sheet and the lower gasket are arranged below the movable iron core, so that the impact on the bottom in the metal shell body is buffered when the movable iron core is reset through the lower copper sheet and the lower gasket, and the noise is further reduced; meanwhile, the oxygen-free copper sheet is arranged on the gasket, so that the transmission path of sound waves, namely noise, can be changed, and the gasket can be prevented from being damaged; according to the invention, the noise reduction structures are arranged at the positions generating noise in the high-voltage direct-current contactor, so that the noise generated by collision of the movable iron core and the static iron core, collision of the push rod with the static iron core during resetting and collision of the movable iron core with the bottom of the metal shell during resetting can be effectively reduced, the mute effect is achieved, the noise standard of the contactor is met, and the use comfort of a user is improved.

In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the present invention. The foregoing description is only a preferred embodiment of the invention, which can be embodied in many different forms than described herein, and therefore the invention is not limited to the specific embodiments disclosed above. And that those skilled in the art may, using the methods and techniques disclosed above, make numerous possible variations and modifications to the disclosed embodiments, or modify equivalents thereof, without departing from the scope of the claimed embodiments. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims (10)

1. The utility model provides a mute type high voltage direct current contactor, includes yoke casing (1), fixes magnetic conductive plate (2), coil (3) and iron core subassembly on yoke casing (1), the iron core subassembly is installed yoke casing (1) with between magnetic conductive plate (2), install coil (3) in yoke casing (1) and the suit in the iron core subassembly outside, its characterized in that: the iron core assembly comprises a static iron core (4) and a movable iron core (5), the static iron core (4) is fixedly arranged on the magnetic conduction plate (2), and the movable iron core (5) is positioned below the static iron core (4) and can move up and down relative to the static iron core (4); move iron core (5) top and set up actuation portion (501), actuation portion (501) have magnetism and feel line dispersion (5011), quiet iron core (4) bottom structure match in actuation portion (501), the during operation move iron core (5) orientation quiet iron core (4) remove, magnetism feel the line by magnetism feels line dispersion (5011) and disperses.

2. The mute-type high voltage direct current contactor according to claim 1, wherein: the section of the attraction part (501) is trapezoidal or is arranged in a trapezoidal groove at the top of the movable iron core (5), and the magnetic induction line dispersion surface (5011) is an oblique side edge of the attraction part (501).

3. The mute-type high voltage direct current contactor according to claim 1, wherein: iron core subassembly still includes push rod (6), push rod (6) run through quiet iron core (4) with move iron core (5) fixed connection, be provided with on push rod (6) and be located spacing card platform (601) in quiet iron core (4), quiet iron core (4) with install between magnetic conduction plate (2) with spacing card platform (601) cooperation buffer structure who uses.

4. The mute-type high voltage direct current contactor according to claim 3, wherein: buffer structure including install quiet iron core (4) top and with fixed plate (7) and cushion (8) of magnetic conduction board (2) fixed connection, cushion (8) are installed fixed plate (7) with between quiet iron core (4), push rod (6) rebound makes spacing card platform (601) support and lean on cushion (8).

5. The mute-type high voltage direct current contactor according to claim 4, wherein: quiet iron core (4) top extends towards outside and forms annular boss (401), blotter (8) cladding annular boss (401) and quiet iron core (4) top, magnetic conduction board (2) cooperation annular boss (401) compress tightly blotter (8).

6. The mute-type high voltage direct current contactor according to claim 4, wherein: the fixing plate (7) is an elastic sheet with elastic deformation force, and the fixing plate (7) is fixedly connected with the magnetic conduction plate (2) in a welding mode.

7. The mute-type high voltage direct current contactor according to claim 3, wherein: the fixed iron core (4) is internally provided with a stroke limiting groove (402) for limiting the sliding of the clamping table (601), the bottom of the stroke limiting groove (402) is provided with a first silencing assembly, and the first silencing assembly comprises an upper gasket (9) and an upper copper sheet (10) arranged at the top of the upper gasket (9).

8. The mute-type high voltage direct current contactor according to claim 1, wherein: and a second silencing assembly is arranged below the movable iron core (5), and comprises a lower gasket (11) and a lower copper sheet (12) arranged at the top of the lower gasket (11).

9. The mute-type high voltage direct current contactor according to claim 3, wherein: still including installing ceramic casing (13) and the interval at magnetic conduction board (2) top are installed two static contact (14) on ceramic casing (13), ceramic casing (13) with form the explosion chamber between magnetic conduction board (2), push rod (6) top extends to in the explosion chamber and install movable contact spring (15).

10. The mute-type high voltage direct current contactor according to claim 3, wherein: the static iron core (4) and the movable iron core (5) are relatively provided with a spring accommodating groove, a reset spring (16) is installed in the spring accommodating groove, and the reset spring (16) is sleeved on the push rod (6).

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