JP2003288830A - Electromagnetic relay for high voltage and large current - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control switching of a pair of relay switches with an identical relay coil. <P>SOLUTION: The electromagnetic relay for high voltage and large current is provided with a coil bobbin 41 having a coil bobbin and wound around with a coil wire material 42, a yoke 46 arranged at one side of the coil bobbin 41, an armature 55 pivotally supported by the yoke 46 in free rotation and attracted to the core 45 by excitation of the coil wire material 41, a movable contact spring 50 supporting the armature 55, an angle-shape bracket 57 fixed to the armature 55, a pair of movable pieces 60, 61 fixed to the bracket 57, a pair of movable contacts 62, 63 fixed to the movable pieces 60, 61 and facing the pair of the movable contacts 62, 63, and a pair of connecting conductive wires 25, 27 connected with the movable pieces 60, 61. Insulation-withstanding voltage of the switch can be improved by making an air gap large by adoption of leverage, and the size and rating of the electromagnetic relay can be made compact by reducing snapping force of the movable contact spring. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay for high voltage and large current, and more particularly to an electromagnetic relay effectively used for opening / closing control between a power source and a driving electric motor in a hybrid vehicle or an electric vehicle.

[0002]

2. Description of the Related Art As a power source of a hybrid vehicle or an electric vehicle is a battery (including a fuel cell), an electric motor for driving (hereinafter referred to as a motor) mounted on the hybrid vehicle or the electric vehicle is a DC type. Moreover, since it is necessary to exert a large output, the driving power is, for example, 200V.
-Set to high voltage and high current such as 600A. In this high-voltage, large-current motor drive electric circuit, when the motor is not in use, the positive side path and the negative side path are opened at the same time to reliably disconnect the motor from the power supply and improve safety. The relays are respectively provided on the positive side path and the negative side path of the motor drive electric circuit. Here, when a pair of electromagnetic relays are respectively provided in the positive side path and the negative side path of the motor drive electric circuit, the structure for precisely ensuring the mutual synchronization becomes complicated, so one unit It is desirable to set a relay switch for the positive side path and a relay switch for the negative side path in the electromagnetic relay so that both relay switches are simultaneously controlled to open and close by the same relay coil.

As a conventional high-voltage large-current electromagnetic relay in which a pair of relay switches are simultaneously controlled to open and close by the same relay coil, a pair of relay switches is provided at the tip of one plunger which is advanced and retracted in a straight line by the relay coil. Plunger type electromagnetic relays having fixed movable contacts are known. In this plunger type electromagnetic relay, the air gap (distance between the movable contact and the fixed contact) that regulates the dielectric strength of the relay switch can be set large by setting the plunger forward / backward distance to a large value. It can easily handle large currents. Further, in the plunger type electromagnetic relay, a structure in which hydrogen gas or the like is sealed may be adopted in order to increase the withstand voltage.

[0004]

However, in the plunger type electromagnetic relay, when the elastic force of the return spring is set to be large in order to secure the contact pressure when the pair of relay switches is closed, the attraction force of the relay coil is increased. Therefore, there is a problem in that the physical size and power consumption of the relay coil increase, and the overall physical size and rating increase. Further, when adopting a structure that seals hydrogen gas or the like to improve the dielectric strength, not only the structure becomes complicated, but there is a problem in reliability of ensuring gas tightness. There is also a problem that it is difficult to handle in manufacturing.

It is an object of the present invention to control the opening and closing of a pair of relay switches by the same relay coil while suppressing the physique and rating, and enabling arc interruption in the atmosphere without using an arc suppressing gas. It is to provide an electromagnetic relay for high voltage and large current.

[0006]

SUMMARY OF THE INVENTION An electromagnetic relay for high voltage and high current according to the present invention comprises a coil bobbin having a core in the center and a coil wire wound around the yoke, and a yoke arranged on one side of the coil bobbin. An armature, one end of which is rotatably supported by the yoke, is attracted to the attracting portion of the core by excitation of the coil wire, a movable contact spring that holds the armature at its free end, and one end of the armature. An angle-shaped bracket to which is fixed,
A pair of movable pieces fixed to the other end of the bracket,
A pair of movable contacts fixed to one end of each of the pair of movable pieces and opposed to the pair of fixed contacts, and a pair of connecting conductors electrically connected to the other ends of the pair of movable pieces, respectively. It is characterized by having.

According to the above-mentioned means, one end of the angle-shaped bracket is fixed to the armature rotatably supported on the yoke, and one end of the pair of movable pieces is attached to the other end of the bracket. Since the part is fixed, the moving distance of the movable piece can be set to be larger than the moving distance of the armature, and the pair of movable contacts of the pair of movable contacts fixed to the other ends of the pair of movable pieces, respectively. Since it is possible to set a large air gap for operation with respect to the fixed contact and also to use the principle of leverage, it is possible to suppress an increase in elastic force of the movable contact spring. Then, by setting a large air gap between the movable contact and the fixed contact, it is possible to enhance the dielectric strength performance of the pair of relay switches. In addition, by suppressing the increase in the elastic force of the movable contact spring, it is possible to prevent the physical size and power consumption of the relay coil from increasing, thus preventing the physical size and rating of the electromagnetic relay as a whole from increasing. can do. Further, by disposing a magnet near the contact, it is possible to suppress arc generation. Further, by setting the contact on the side opposite to the coil with respect to the yoke, it is possible to further reduce the size of the body that can prevent the arc from directly scattering to the coil.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

In the present embodiment, the electromagnetic relay for high voltage and high current according to the present invention is configured to be used in a drive electric circuit of a motor of a hybrid vehicle or an electric vehicle, for example, 100V / 100A or more. Electromagnetic relay for high voltage and high current rated by (hereinafter referred to as electromagnetic relay)
Is configured as. That is, as shown in FIG. 1, an electromagnetic relay 4 provided in a drive electric circuit 3 for a power source 1 and a motor 2 of a hybrid vehicle or an electric vehicle is a relay switch for a negative side path (hereinafter, a negative side switch). 5) and a relay switch for the positive electrode side path (hereinafter referred to as the positive side switch) 6, and the negative side switch 5 and the positive side switch 6 are the same relay coil (hereinafter referred to as the coil) 7. The opening and closing is controlled by. Coil 7 is 12V 0.4A
It is driven by a normal automobile battery 8 such as the above, and the excitation / demagnetization is controlled by the controller 9.

As shown in FIGS. 2 to 6, the electromagnetic relay 4 includes a base 10 formed of a substantially rectangular flat plate using an insulating resin. Base 1
A partition wall (hereinafter referred to as a first partition wall) 11 for partitioning the minus side switch 5 and the plus side switch 6 is located on the longer center line of one main surface 0 (hereinafter referred to as the upper surface).
Are erected vertically, and a partition wall (hereinafter, referred to as a right side and a left side) that divides the minus side switch 5 and the plus side switch 6 on both sides (hereinafter, referred to as right side and left side) on the shorter center line on the upper surface of the base 10. A second partition wall) 12 is erected vertically. The first partition wall 11 and the second partition wall 12 have a cross shape in which their central portions are orthogonally connected to each other. First partition wall 1 on the upper surface of the base 10
A front right end mounting groove 13 and a front left end mounting groove 14 are respectively recessed in the right end portion and the left end portion of one side (hereinafter, referred to as front side) of 1 and the rear right end portion on the upper surface of the base 10 is provided. A rear right end mounting groove 15 and a rear left end mounting groove 16 are respectively recessed in the left end portion and the left end portion. Front right end mounting groove 1
3 and the rear right end mounting groove 15 are formed in the shape of a guide groove having a fixed width and a constant depth with the right end open and the left end closed, and the front left end mounting groove 14 and the rear left end mounting groove 16 are open at the left end. The right end of the groove is formed into a guide groove with a constant width and a constant depth. The fixed contact terminal unit 17 of the negative side switch 5 is mounted in the front right end mounting groove 13, and the movable contact terminal unit 18 of the negative side switch 5 is mounted in the front left end mounting groove 14. Further, the fixed contact terminal unit 19 of the positive side switch 6 is mounted in the rear right end mounting groove 15, and the positive side switch 6 is mounted in the rear left end mounting groove 16.
The movable contact terminal unit 20 is attached.

Since the four terminal units 17 to 20 have substantially the same structure and are mounted symmetrically in the front-rear direction, the structure and the mounting structure are the terminal unit for the fixed contact of the minus side switch 5 (in the following description, the terminal unit). The unit 17 will be described as a representative and mainly described with reference to FIGS. 5 and 6.

The terminal unit 17 comprises a terminal plate 21, a fixed piece 22 and a mounting shaft 23. The terminal plate 21 is punched and pressed using a plate body having a good conductivity such as a copper plate,
As shown in FIG. 6, the side view is bent into a U shape. The fixing piece 22 is formed in a substantially square flat plate shape of a size that slidably fits in the front right end mounting groove 13, and a mounting shaft 23 formed by a male screw member is formed at the center of the upper surface of the fixing piece 22. It is fixed vertically. Mounting shaft 2
3 is inserted from below into an insertion hole formed in the upper horizontal portion of the terminal plate 21, and the upper surface of the fixing piece 22 is in contact with the lower surface of the upper horizontal portion. The terminal plate 21 is attached to the front right end of the base 10 with a fixing piece 22 fitted into the front right end mounting groove 13 from an opening at the right end, and sandwiching the front right end by an upper horizontal part and a lower horizontal part. . The terminal plate 21 attached to the front right end of the base 10 is restricted from moving in the left-right direction by a cover 81 placed on the base 10.

A fixed contact (hereinafter, referred to as a negative side fixed contact) 24 of the negative side switch 5 is vertically downward on the lower horizontal portion of the terminal plate 21 of the fixed contact terminal unit 17 of the negative side switch 5. One end of a minus-side connecting conductor wire 25 is welded to the lower surface of the lower horizontal portion of the terminal plate 21 of the movable contact terminal unit 18 of the minus-side switch 5 which is protrudingly provided. A fixed contact (hereinafter, referred to as a positive side fixed contact) 26 of the positive side switch 6 is provided on the lower horizontal portion of the terminal plate 21 of the fixed contact terminal unit 19 of the positive side switch 6 so as to vertically project downward. One end of a plus side connecting conductor 27 is welded to the lower surface of the lower horizontal portion of the terminal plate 21 of the movable contact terminal unit 20 of the plus side switch 6. By the way, one end of the negative side path is electrically connected to the mounting shaft 23 of the fixed contact terminal unit 17 of the negative side switch 5, and the negative side of the mounting shaft 23 of the movable contact terminal unit 18 of the negative side switch 5. The other end of the path is electrically connected. Further, one end of the positive side path is electrically connected to the mounting shaft 23 of the fixed contact terminal unit 19 of the positive side switch 6, and the mounting shaft 23 of the positive side movable contact terminal unit 20 is connected to the other side of the positive side path. The ends are connected.

A pair of engaging claws 28 for fixing the cover are provided on both left and right end surfaces of the base 10 so as to project. A rod-shaped support portion 29 hangs down from the center of the left end surface of the base 10, and a mounting piece 30 is provided at the lower end of the support portion 29 so as to project outward in the horizontal direction. A pair of fixed cylinders 31, 31 for fixing the coil assembly and the magnet assembly are respectively formed in a substantially two-stage cylindrical shape at the central portion of the front and rear sides of the base 10 and are provided in a protruding manner in the vertical direction. The coil assembly 40 shown in FIG. 7 and the magnet assembly 70 shown in FIG.
Are fixed by screw members 32 (see FIG. 1).
Next, the coil assembly 40 and the magnet assembly 7
0 will be described.

As shown in detail in FIG. 7, the coil assembly 40 is a coil bobbin (hereinafter referred to as a bobbin) integrally formed in a bobbin shape by using an insulating resin.
The coil wire 42 is wound around the bobbin 41. The winding start end portion and the winding end end portion of the coil wire 42 are electrically connected to a pair of coil terminal members 43 and 44 formed by punching press using a plate material having good conductivity such as a copper plate. Has been done. A pair of coil terminal members 43, 44
Is formed in an L shape, and its vertical portion is inserted and fixed from below into a mounting portion piece 30 at the lower end of a support portion 29 hanging from the right end of the base 10.

A rectangular flat plate-shaped core 45 made of a magnetic material such as iron is inserted in the hollow portion of the cylindrical portion of the bobbin 41 in the left-right direction, and the suction portion 45a set at the left end of the core 45 is The bobbin 41 is slightly projected from the left end surface. On the outside of the right side flange of the bobbin 41 of the core 45, a yoke 46 formed in an angle shape with a plate material of a magnetic material such as iron is fixed.
6 is fixed to both fixed cylinders 31, 31 of the base 10. That is, the height of the yoke 46 is substantially equal to the height of the bobbin 41, and the length in the left-right direction is slightly longer than the axial length of the bobbin 41.
A pair of bracket parts 47, 47 projectingly provided at substantially central portions on the front and rear end sides of the lateral piece 6 are fastened to both fixed cylinders 31, 31 of the base 10 together with the magnet assembly 70 by screw members 32, 32. ing.

The crimping portion 45b of the core 45 is inserted into the vertical portion of the yoke 46 for crimping, and the bobbin 41 is fixed to the yoke 46 via the core 45. A positioning recess 48 is formed at a constant depth on the left end side of the yoke 46 opposite to the caulking part 45b, and the width of the positioning recess 48 in the front-rear direction corresponds to the width of the hinge part 56 of the armature 55 in the front-rear direction. ing. On the upper surface of the lateral piece of the yoke 46, a pair of protrusions 49, 49 are vertically arranged and protrude. The fixed end portion 51 of the movable contact spring 50 is brought into contact with the upper surface of the yoke 46 on which both the projections 49, 49 are projected and fixed by caulking. That is, the movable contact spring 50 is bent and formed into an angle shape by using a leaf spring material having conductivity, and the fixed end portion 5 is formed.
1 and a free end 52. The fixed end portion 51 and the free end portion 52 have a pair of hinge portions 53, 5 bent at a right angle.
They are connected by 3. The fixed end portion 51 is formed in a vertically long rectangular plate shape, and a pair of mounting holes are formed at the right end portion of the fixed end portion 51. York 46
When the fixed end portion 51 of the movable contact spring 50 is brought into contact with the
The protrusions 49, 49 are fitted into the mounting holes, respectively, and the protrusions 49, 49 are caulked to fix the fixed end portion 51 to the yoke 46.

An armature 55 and a bracket 57 are fastened together by a pair of rivets 54 on the right end surface of the free end portion 52 of the movable contact spring 50. The armature 55 is formed in a rectangular plate shape having a front-rear width equal to the front-rear width of the free end portion 52 of the movable contact spring 50, and a substantially square notch-shaped hinge portion 56 is formed at the upper end portion of the armature 55. Has been done. In the state where the movable contact spring 50 is fixed to the yoke 46, the hinge portion 56 of the armature 55 is rotatably fitted into the positioning recess 48 of the yoke 46. It is in a state of being supported by the positioning recess 48 so as to rotate accurately in the vertical plane.

The bracket 57 is made of an insulative resin and is formed in an angle shape. The vertical piece is sandwiched between the movable contact spring 50 and the armature 55 and fastened by a pair of rivets 54. . On the upper surface of the lateral piece of the bracket 57, a movable piece 60 of the minus side switch 5 (hereinafter referred to as a minus side movable piece) and a movable piece of the plus side switch 6 (hereinafter referred to as a plus side movable piece).
61 is fastened by a pair of rivets 58 and 59, respectively. At the right end of the negative side movable piece 60, a movable contact 62 of the negative side switch 5 (hereinafter referred to as a negative side movable contact) 62 is a fixed contact 2 of the negative side switch 5.
4 is projected vertically upward so as to face 4,
A movable contact (hereinafter referred to as a positive side movable contact) 63 of the positive side switch 6 is provided on the right end portion of the positive side movable piece 61 so as to project vertically upward so as to face the fixed contact 26 of the positive side switch 6. There is. At the left end of the minus side movable piece 60, one end of the minus side connecting conductor 25, the other end of which is welded to the movable contact terminal unit 18 of the minus side switch 5, is welded, and the plus side movable piece 61.
One end of the plus side connecting conductor wire 27, the other end of which is welded to the movable contact terminal unit 20 of the plus side switch 6, is welded to the left end of the. A stopper portion 57a is provided so as to project downward at the center of the right end side of the horizontal piece of the bracket 57, and the stopper portion 57a contacts the upper surface of the yoke 46 to regulate the position of the bracket 57 in the opening direction. It has become. Since the stopper portion 57a is made of resin, it has a function of restricting the position of the bracket 57 in the opening direction and a function of suppressing the operation sound when the bracket 57 is opened.

A bracket portion 64 is provided on the lower end portion of the left side flange of the bobbin 41 so as to project leftward in the horizontal direction, and a pair of coil terminal members 43 and 44 are provided at the center portion of the upper surface of the bracket portion 64 in the front-rear direction. Each horizontal part is fixed. A pair of sub-terminal members 65 and 66 are fixed to the front and rear sides of the coil terminal members 43 and 44 on the lower surface of the bracket portion 64, and the sub-terminal members 65 and 66 are formed in an L shape. The vertical portion is fixed by being inserted into the mounting portion 30 at the lower end of the support portion 29 suspended from the right end of the base 10 from below at the front and rear sides of the coil terminal members 43 and 44. . A mounting portion piece 65a is bent upward in the vertical direction at the right end portion of the front sub-terminal member 65, and a fixed contact 67 is provided on the upper end portion of the mounting portion piece 65a so as to project rightward. A mounting piece 66a is bent upward in the vertical direction at the right end of the rear sub-terminal member 66, and a plate material having a spring property such as a copper plate is used at the upper end of the mounting piece 66a to form an elongated plate shape. One end of a movable piece 68 that is formed to extend in the front-rear direction is fixed. A movable contact 68a is projectingly provided at a front end portion which is a free end of the movable piece 68 so as to face the fixed contact 67, and the movable piece 68 is attached to an engaging piece 69 projectingly provided at a lower end portion of the bracket 57. It is adapted to be opened and closed by being engaged from the left.

The magnet assembly 70 is provided with a sub-cover 71 which is made of resin having an insulating property and integrally formed in the shape shown in FIG. The sub-cover 71 includes a coil cover portion 72 that covers the right end portion of the coil assembly 40 and has a rectangular parallelepiped box shape with an open left side wall. As shown in FIG. 3 and FIG. The portion 72 covers the bobbin 41 of the coil assembly 40 and the right end portion of the yoke 46 from the right side. A pair of front and rear bracket portions 73, 73 are provided on the upper end of the left end of the coil cover portion 72 so as to project in the left direction and the front and rear direction, respectively, and both bracket portions 73, 73 of the fixed cylinders 31, 31 of the base 10 are provided. The magnet assembly 70 is fixed to the base 10 and the coil assembly 40 by being fastened together with the pair of bracket portions 47, 47 of the yoke 46 to the lower end surface by the screw members 32, 32. A partition wall 74 is erected vertically on the center line in the front-rear direction on the upper surface of the coil cover portion 72.

At the right end of the partition wall 74, a magnet holding portion 77 formed in the shape of a rectangular parallelepiped box having an upper end opening is extended in the front-rear direction and the vertical direction, and the magnet holding portion 77 has a rectangular flat plate shape. The formed magnet 78 and the plate 79 formed in a rectangular flat plate shape are housed in order from the left side. Magnet assy 70
Is assembled to the coil assembly 40,
The relationship between the magnet 78 and the plate 79 and the minus side movable contact 62 and the plus side movable contact 63 is shown in FIG.
As shown in (a), the longitudinal direction of the magnet 78 and the plate 79 is parallel to the direction in which the minus side movable contact 62 and the plus side movable contact 63 are arranged,
The partition walls 74 are orthogonal to each other. In addition, FIG.
As shown in (b), the magnetic flux direction 91 of the magnet 78 and the magnetic flux direction 92 of the coil assembly 40 are
It is set in the same direction so that the magnetic force of the coil assembly 40 can be reinforced by the magnetic force of the magnet 78.

A fixing portion 80 is provided so as to project rightward on the center line in the front-rear direction on the right end surfaces of the magnet holding portion 77 and the coil cover portion 72. The right end surface of the fixing portion 80 is the inner peripheral surface of the cover 81. It comes in contact with a part of the. By this contact, the magnet assembly 70 is reliably positioned by the cover 81.

As shown in FIG. 2, a cover 81 is attached to the base 10 on which the coil assembly 40 and the magnet assembly 70 are assembled so as to cover the coil assembly 40 and the magnet assembly 70. The cover 81 includes a cover main body 82 integrally formed by using an insulating resin, and the cover main body 82 is a box body having an upper surface opening and having a substantially rectangular shape similar to the planar shape of the base 10. Has been formed. A pair of brackets 83, 83 project horizontally forward and backward, respectively, at the lower left end of the front surface and the lower right end of the rear surface of the cover body 82.
A pair of through holes 84, 84 are formed in the holes 3, 83, respectively. Semi-cylindrical parts 85 and 85 for escaping the pair of fixed cylinders 31 and 31 are provided at the center of the front wall of the cover body 82 in the left-right direction and the center of the rear wall, respectively.

On the lower half of the left side surface of the cover body 82 on the center line in the front-rear direction, a substantially rectangular prismatic coupler portion 86 having an open upper surface and a closed lower surface is provided so as to protrude leftward. In the state where the cover 81 is put on the base 10, the inside of the coupler portion 86 is a mounting piece 30 horizontally protruding from the lower end of the support portion 29 at the right end of the base 10 and four mounting pieces 30 mounted on the mounting piece 30. Terminal members 43, 44,
65 and 66 are accommodated in the coupler portion 86 and the terminal members 43, 44, 65 and 66.
The coupler is in a state of being integrally assembled with the electromagnetic relay 4. A mating coupler (not shown) electrically connected to the controller 9 for controlling the motor 2 is inserted into the coupler unit 86 and electrically connected thereto.

Next, the operation and effect will be described.

A pair of coil terminal members 43, 44 from the controller 9 for controlling the motor 2 through the counterpart coupler mounted on the coupler section 86 of the electromagnetic relay 4.
When a voltage is applied to the armature 55, the coil wire 42 is excited and the core 45 magnetically attracts the armature 55. Therefore, the vertical portion of the bracket 57 fixed to the armature 55 together with the movable contact spring 50 attracts the core 45. Part 45
It is sucked in the direction of a. When the vertical portion of the bracket 57 is sucked in the direction of the suction portion 45 a, the minus side movable piece 60 and the plus side movable piece 61 fixed to the bracket 57.
Is a minus side fixed contact 24 and a plus side fixed contact 26
Since it rotates in the direction of, the minus side movable contact 62 of the minus side movable piece 60 and the plus side movable contact 63 of the plus side movable piece 61 simultaneously contact the minus side fixed contact 24 and the plus side fixed contact 26. Therefore, the fixed contact terminal unit 17 of the minus side switch 5 is electrically connected to the movable contact terminal unit 18 by the fixed contact 24, the movable contact 62, the movable piece 60 and the minus side connecting conductor 25. Also, the plus side switch 6
The fixed contact terminal unit 19 of FIG.
The movable piece 61 and the plus side connecting conductor 27 are electrically connected. That is, the reliability of the closing operation of the motor drive electric circuit 3 can be improved.

At this time, the controlled current of high voltage and large current bypasses the movable contact spring 50 to be energized, so that the movable contact spring 5
It is possible to prevent a failure such as heat generation due to the energization resistance at 0. Moreover, since the negative side movable piece 60, the minus side connecting conductor 25, and the plus side movable piece 61 and the plus side connecting conductor 27 are set to have a low electric resistance, it is possible to reliably prevent the occurrence of troubles such as heat generation. . Therefore, even a controlled current of high voltage and large current can be satisfactorily energized without causing trouble such as heat generation.

When the application of the voltage to the coil terminal members 43 and 44 is stopped, the coil wire 42 and the core 45 are demagnetized, so that the vertical portion of the movable contact spring 50 is elastically moved by the movable contact spring 50. By returning,
The vertical portion of the bracket 57 fixed to the armature 55 together with the movable contact spring 50 separates from the suction portion 45a of the core 45. Then, since the minus side movable piece 60 and the plus side movable piece 61 fixed to the bracket 57 rotate in the direction away from the minus side fixed contact 24 and the plus side fixed contact 26, the minus side movable piece 60 is moved to the minus side. The contact 62 and the plus side movable contact 63 of the plus side movable piece 61 are separated from the minus side fixed contact 24 and the plus side fixed contact 26 at the same time, and the minus side switch 5 and the plus side switch 6 are simultaneously opened. That is, the reliability of the opening operation of the motor drive electric circuit 3 can be improved. The stopper portion 57a provided so as to project downward on the bracket 57 exhibits a predetermined position stop and a sound deadening effect when opened.

By the way, when handling a high voltage and a large current as the controlled current, arc discharge occurs when the minus side movable contact 62 separates from the minus side fixed contact 24 and when the plus side movable contact 63 separates from the plus side fixed contact 26. There is a high possibility that sparks will fly.

However, in the present embodiment, as shown in FIG. 9, the magnet 78 and the plate 7 are
Since 9 is opposed to the negative side movable contact 62 in parallel with the direction in which the negative side movable contact 62 and the positive side movable contact 63 are lined up, the negative side movable contact 62 is fixed to the negative side fixed contact 24.
Since the arc discharge at the time of leaving from and the arc discharge at the time of leaving the plus side movable contact 63 from the plus side fixed contact 26 are simultaneously extinguished, sparks are prevented from flying due to the arc discharge.

By the way, during the forward interruption, the arc extinguishing direction is separated from the minus side movable contact 62 and the plus side movable contact 63, as shown by solid arrows 93 and 93 in FIG. 9 (a). Therefore, they can cancel each other. However, when breaking in the opposite direction, the arc extinguishing direction becomes a direction in which the minus side movable contact 62 and the plus side movable contact 63 approach each other, as indicated by the broken line arrows 94, 94, so that they influence each other. I will end up with each other. Here, in the present embodiment,
Since the partition wall 74 partitions the space between the minus side movable contact 62 and the plus side movable contact 63, it is possible to shield the arc discharge at the minus side movable contact 62 and the arc discharge at the plus side movable contact 63. Therefore, even when the reverse direction is cut off, the magnet 7 facing the minus side movable contact 62 and the plus side movable contact 63
The arc discharge when the minus side movable contact 62 separates from the minus side fixed contact 24 and the arc discharge when the plus side movable contact 63 separates from the plus side fixed contact 26 can be simultaneously extinguished by means of 8. It is possible to prevent sparks from flying.

In this embodiment, one end of the armature 55 is rotatably supported by one end of the yoke 46.
The angled vertical portion of the bracket 57 is fixed to the bracket 57, and one end of the minus side movable piece 60 and the plus side movable piece 61 is fixed to the horizontal portion of the bracket 57. On the other hand, since the moving distances of the movable pieces 60 and 61 can be set to be large, the minus side movable contact 62 and the plus side movable contact fixed to the other end of the minus side movable piece 60 and the plus side movable piece 61, respectively. Since the air gap in operation with respect to the minus side fixed contact 24 and the plus side fixed contact 26 of 63 can be set large and the principle of leverage can be utilized, the elastic force of the movable contact spring 50 can be increased. Can be suppressed. Also, the contact is the yoke 4.
Since it is arranged on the side opposite to the coil bobbin 41 with respect to 6, it is possible to prevent the arc from directly scattering onto the coil wire 42, and it is possible to reduce the size of the body. By setting a large air gap between the minus side movable contact 62 and the plus side movable contact 63 and the minus side fixed contact 24 and the plus side fixed contact 26, the withstand voltage performance of the minus side switch 5 and the plus side switch 6 can be improved. Can be increased. Further, by suppressing the increase of the elastic force of the movable contact spring 50, it is possible to suppress the increase in the physique and the power consumption of the coil assembly 40, so that the physique and the rating of the electromagnetic relay 4 as a whole are increased. Can be prevented. Further, by providing the opening / closing structure for both the positive electrode side and the negative electrode side of the motor drive electric circuit, the required gap between the contacts can be set small in view of the relationship between the arc generation and the contact durability. Furthermore, since the arc energy applied to the contact can be reduced, the durability of the contact can be improved.

[0034]

As described above, according to the present invention,
It is possible to suppress the size and rating of the electromagnetic relay for high voltage and high current, and to make it possible to control the opening and closing of a pair of relay switches with the same relay coil while interrupting the arc in the atmosphere without using the arc suppressing gas. .

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a motor drive electric circuit using an electromagnetic relay for high voltage and large current according to an embodiment of the present invention.

FIG. 2 is an external perspective view showing the high voltage, high current electromagnetic relay.

FIG. 3 shows a state in which a cover is removed, (a) is a plan view, and (b) is a front view.

FIG. 4 is a front sectional view.

FIG. 5 shows a base assembly, (a) is a front view and (b) is a bottom view.

FIG. 6 also shows a base assembly, (a) is a right side view, and (b) is a left side view.

FIG. 7 shows a coil assembly, (a) is a front view, (b) is a left side view, and (c) is a plan view.

FIG. 8 shows a magnet assembly, where (a) is a front view, (b) is a left side view, (c) is a plan view, (d) is a bottom view, and (e) is (e) of (d). a front sectional view taken along the line e,
(F) is a front sectional view taken along the line ff of (d).

FIG. 9A is a plan view showing the relationship between the magnet and the movable contact, and FIG. 9B is a side view showing the relationship between the magnet and the coil assembly.

[Explanation of symbols]

1 ... Power source for hybrid vehicle and electric vehicle, 2 ... Motor,
3 ... Motor drive electric circuit, 4 ... Electromagnetic relay, 5 ... Negative side route relay switch (minus side switch), 6 ... Positive side route relay switch (plus side switch), 7 ...
Relay coil (coil), 8 ... Ordinary automobile battery, 9 ... Controller, 10 ... Base, 11 ... First partition wall, 12 ... Second partition wall, 13 ... Front right end mounting groove, 14 ...
Front left end mounting groove, 15 ... Rear right end mounting groove, 16 ... Rear left end mounting groove, 17 ... Negative side switch fixed contact terminal unit, 18 ... Negative side switch movable contact terminal unit, 19 ... Plus side switch Fixed contact terminal unit, 20 ... Positive side switch movable contact terminal unit, 21 ... Terminal plate, 22 ... Fixed piece, 23 ... Mounting shaft, 24 ... Negative side fixed contact, 25 ... Negative side connecting conductor, 26 ... Positive side fixed contact, 27 ... Positive side connecting conductor, 28 ... Engaging claw, 2
9 ... Supporting part, 30 ... Mounting part piece, 31 ... Fixed tube, 32 ... Screw member, 40 ... Coil assembly, 41 ... Coil bobbin (bobbin), 42 ... Coil wire, 43, 44 ... Coil terminal member, 45 ... Core , 45a ... Suction part, 45b
... Caulking part, 46 ... Yoke, 47 ... Bracket part, 48
... Positioning recess, 49 ... Protrusion, 50 ... Movable contact spring, 5
DESCRIPTION OF SYMBOLS 1 ... Fixed end part, 52 ... Free end part, 53 ... Hinge part, 54
… Rivet, 55… Armature, 56… Hinge part, 5
7 ... Bracket, 58, 59 ... Rivet, 60 ... Minus side movable piece, 61 ... Plus side movable piece, 62 ... Minus side movable contact, 63 ... Plus side movable contact, 64 ... Bracket part, 65, 66 ... Sub terminal member , 65a, 66a
... Mounting piece, 67 ... Fixed contact, 68 ... Movable piece, 68a ...
Movable contact, 69 ... Engaging piece, 70 ... Magnet assembly,
71 ... Sub cover, 72 ... Coil cover part, 73 ... Bracket part, 74 ... Partition wall, 75, 76 ... Stopper, 77
... magnet holding part, 78 ... magnet, 79 ... plate, 80 ... fixing part, 81 ... cover, 82 ... cover body,
83 ... Bracket, 84 ... Through hole, 85 ... Semi-cylindrical part, 86
… Coupler part.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H02P 1/10 H02P 1/10 (72) Inventor Noriyuki Abe 1-4-1 Chuo, Wako, Saitama Incorporated company Honda R & D Co., Ltd. (72) Inventor Taichi Ogawa 1-4-1 Chuo, Wako-shi, Saitama Incorporated company Honda R & D Co., Ltd. (72) Satoshi Tasaki 1-1-4 Wako-shi, Saitama Prefecture Incorporated company Honda R & D Co., Ltd. (72) Inventor Takayuki Kawai 1-2681 Hirosawa-cho Kiryu-shi Gunma Prefecture Mitsuba Co., Ltd. (72) Inventor Hiroyuki Mori 1-2681 Hirosawa-cho Kiryu-shi Gunma Prefecture Mitsuba F Company Ltd. Term (reference) 5H001 AC01

Claims (6)

[Claims] 1. A coil bobbin having a core in the center and around which a coil wire is wound, a yoke arranged on one side of the coil bobbin, and one end of the yoke being rotatably supported by the yoke. An armature that is attracted to the attraction part of the core by excitation, a movable contact spring that holds this armature at its free end, an angle-shaped bracket whose one end is fixed to the armature, and the other end of this bracket. A pair of fixed movable pieces, a pair of movable contacts fixed to one end of the pair of movable pieces and opposed to the pair of fixed contacts, and an electrical connection to the other end of the pair of movable pieces, respectively. An electromagnetic relay for high voltage and large current, comprising: a pair of connecting conductors connected to the. 2. A magnet is arranged on one side of the pair of movable contacts and the pair of fixed contacts facing each other, and a longitudinal direction of the magnet is arranged in parallel with a direction in which the pair of movable contacts are arranged. The electromagnetic relay for high voltage and high current according to claim 1. 3. The electromagnetic relay for high voltage and large current according to claim 2, wherein the direction of the magnetic flux of the magnet and the direction of the magnetic flux of the coil bobbin are set to be the same. 4. The high voltage, high current electromagnetic relay according to claim 1, wherein a partition wall is provided between the pair of movable contacts. 5. The electromagnetic relay for high voltage and high current according to claim 1, 2, 3 or 4, wherein the bracket is provided with a stopper portion protruding downward. 6. The pair of movable contacts and the pair of fixed contacts are set so as to respectively constitute a negative side path relay switch and a positive side path relay switch of a motor drive electric circuit. Claim 1,
The high voltage, high current electromagnetic relay according to 2, 3, 4 or 5.