JPH08235992A - Relay mounting structure - Google Patents

Abstract

(57) [Abstract] [Object] The present invention absorbs impact noise and impact vibration generated by a relay that controls intermittently the supply of power to a motor that drives a vehicle from a storage battery provided in an electric vehicle, and provides a driver with the impact noise. It is an object of the present invention to provide a relay mounting structure that can provide a comfortable driving space. [Arrangement] On the plane including the center of gravity G of the box parallel to the facing surfaces 21a and 21b of the main relay 3, the movement direction 29 of the iron core 27 of the solenoid coil 59 is provided in a direction different from the center of gravity G, while The insulators 23a and 23b (elastic bodies) that support the fulcrums on the facing surfaces 21a and 21b of the box body of the main relay 3 that passes through the point G are arranged.
The box body of the main relay 3 is connected to the vehicle 25 via 3a and 23b.
It is configured to be attached to a and 25b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a relay for intermittently controlling the supply of electric power to a motor for driving a vehicle from a storage battery provided in an electric vehicle, and more particularly to an impact sound and an impact vibration generated by the relay. The present invention relates to a relay mounting structure capable of absorbing.

[0002]

2. Description of the Related Art Conventionally, regarding the mounting structure of a relay,
As shown in FIG. 4, a structure is known in which a relay for intermittently controlling the supply of power to a motor for driving a vehicle from a storage battery provided in an electric vehicle is attached to the vehicle.

This is one in which a relay box 101 is attached to a vehicle 105 via an insulator 103 and a screw 105 made of rubber. When the driver turns on the start key of the vehicle, the vehicle is removed from the storage battery. A current is applied to the solenoid coil 109 of the relay 101 to supply power to the motor to be driven, and the iron core 111 is attracted to the magnetized solenoid coil 109 and moved to the position of the stopper 113. At this time, the iron core 111
The contacts 115 that move together are the contacts 117a and the contacts 11a.
7b is electrically connected, and as a result, from the storage battery side wiring 119 to the contact point 117a, the contact point 115 and the contact point 11
An extremely large current flows through the wiring 121 on the inverter side for controlling the drive of the motor via 7b.

[0004]

However, in the conventional relay mounting structure, the solenoid coil 10 is used.
9 is magnetized to draw the iron core 111, and when the iron core 111 collides with the stopper 113 and then stops, shock noise and shock vibration are generated. There is a problem that the vibration is transmitted to the vehicle 105 through the screw 105 and the insulator 103 located in the movement direction, the impact vibration is converted into an impact sound by the vehicle, and an extremely loud impact sound is heard by the driver to cause discomfort. It was

Therefore, the present invention absorbs impact noise and impact vibration generated by a relay that controls intermittently the supply of electric power to a motor for driving a vehicle from a storage battery provided in an electric vehicle, so that the driver is comfortable. It is an object of the present invention to provide a relay mounting structure that can provide an operating space.

[0006]

According to the first aspect of the present invention,
In order to solve the above problems, a storage battery provided in an electric vehicle has a relay that intermittently controls the supply of power to a motor that drives the vehicle, and absorbs impact noise and shock vibration that occur each time the relay is intermittently controlled. In the relay mounting structure, the direction of movement of the iron core of the solenoid coil is set in a direction different from the center of gravity on the plane containing the center of gravity of the box parallel to the facing surface of the relay box, while passing through the center of gravity. An elastic body that supports a fulcrum on the opposite side of the relay box body is disposed, and the relay box body is attached to the vehicle via the elastic body.

[0007]

According to the first aspect of the invention, the moving direction of the iron core of the solenoid coil is provided in a direction different from the center of gravity on a plane including the center of gravity of the box parallel to the facing surface of the relay box An elastic body that supports the fulcrum on the opposite side of the relay box that passes through the points is arranged, and the relay box is attached to the vehicle through the elastic body. The impact sound and impact vibration of the lead can be converted into rotational movement around the center of gravity of the relay box body and absorbed, and the impact sound and impact vibration can be prevented from being transmitted to the vehicle.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

First, the structure of the electric system from the storage battery of the electric vehicle to the motor will be described.

FIG. 1 is a main electric system diagram of an electric vehicle according to the present invention.

The relay box 1 has a main relay 3, a relay 5 and a relay 7, and intermittently controls an extremely large current supplied from a battery 9 to control an inverter 11 and a D.
It is supplied to the C / DC 13 and the auxiliary function 15.

The battery 9 is a storage battery for supplying an extremely large current to a motor 17 which mainly drives a vehicle of an electric vehicle.

The main relay 3 intermittently controls the extremely large current supplied from the battery 9 and supplies it to the inverter 11, and at the same time, D via the relay 5 and the relay 7.
It is supplied to the C / DC 13 and the auxiliary function 15.

The relay 5 and the relay 7 supply the current supplied from the battery 9 to the DC / DC 13 and the auxiliary function 15, respectively.

The inverter 11 converts an extremely large direct current supplied from the battery 9 via the main relay 3 into an alternating current having a frequency proportional to the rotation speed of the motor 17. In addition, in the electric car,
Generally, a microcomputer generates a PWM waveform corresponding to the frequency of an alternating current based on a braking command signal such as an accelerator or a brake, and controls the inverter 11 by this PWM waveform.

The motor 17 rotates at a rotation speed corresponding to the frequency of the alternating current supplied from the inverter 11, and drives the electric vehicle.

The DC / DC 13 converts a DC current supplied from the battery 9 into an AC current once, and then converts it into a DC current again, and the DC / DC 13 has a voltage of 12 V, which is relatively unaffected by the momentary fluctuation or voltage fluctuation of the primary side input. It supplies DC power.

The auxiliary function 15 is an auxiliary function for safely driving an electric vehicle such as a wiper, a horn and a headlight.

Next, FIG. 2 shows the main relay 3 according to the present invention.
FIG. 3 is a perspective view showing that the is attached to the vehicle body of the electric vehicle.

As shown in the perspective view of FIG. 2, the facing surface 21 of the relay box body passes through the center of gravity G of the main relay 3.
Insulators 23a and 23b formed of rubber or resin are arranged at fulcrums on a and 21b.
The box body of the main relay 3 is connected to the vehicle body 25 via the 3a and 23b.
Attach to a and 25b.

Here, the iron core 27 of the solenoid coil is
As shown in FIG. 2, the moving direction of the iron core 27 of the solenoid coil is different from the center of gravity G on the plane including the center of gravity G of the box parallel to the facing surfaces 21a and 21b of the box of the main relay 3. 29 is provided.

Wirings 33a and 33b connected to the battery 9 are attached to the upper surface of the main relay 3 by screws 31, while wirings 33c and 33d are connected to the inverter 11.

Next, FIG. 3 shows the main relay 3 according to the present invention.
FIG. 3 is a top perspective view (a) and a side perspective view (b) showing that is attached to the vehicle body of the electric vehicle.

As shown in the perspective view of the upper surface of FIG. 3A, the iron core 27 of the solenoid coil is arranged at a position different from the center of gravity G of the main relay 3, and the movement direction of the iron core 27 is changed in the vertical direction. Set up. Next, the insulators 23a and 23b are provided at the fulcrums on the facing surfaces 21a and 21b of the relay box body through screws 43a and 43b so as to pass through the center of gravity G of the main relay 3.
The box body of the main relay 3 is attached to the vehicle bodies 25a and 25b through the insulators 23a and 23b with the screws 41a and 41b by utilizing the shearing force.

Next, as shown in the side perspective view of FIG. 3B, the iron core 27 of the solenoid coil 59 is arranged at a position different from the center of gravity G of the main relay 3, and the moving direction of the iron core 27 is set. Are provided in the vertical direction 29. Here, solenoid coil 5
When an electric current is applied to 9 and the iron core 27 is attracted, the iron core 27 moves upward and collides with the stopper 51 to stop. At this time, the contact 5 that moves together with the iron core 27
3 electrically connects between the contact points 55a and 55b, and as a result, from the wiring 33 of the battery 9 to the contact points 55a,
An extremely large current flows through the wiring on the side of the inverter 11 that drives and controls the motor 17 via the contact 53 and the contact 55b.

Next, referring to the side perspective view including the center of gravity shown in FIG. 3B, the movement of the main relay 3 when it is intermittently controlled will be described.

As shown in FIG. 3B, when a current is applied to the solenoid coil 59 and the iron core 27 is attracted, the iron core 27 moves upward and collides with the stopper 51 to cause an impact. Stops by making noise and shock vibration. At this time, since the iron core 27 suddenly collides with the stopper 51, the kinetic energy generated in the iron core 27 is transferred to the kinetic energy of the main relay 3 via the stopper 51. next,
The main relay 3 has an arc direction 57 centered on the center of gravity G.
Make a reciprocating motion. Here, as shown in FIG.
Since the main relay 3 is attached to the vehicle bodies 25a and 25b via the insulators 23a and 23b by a shearing force, the main relay 3 has an arc direction 5 with the center of gravity G as the center.
Damping vibration reciprocates to 7 and stops over time. Further, since the kinetic energy of the main relay 3 is converted into a damping vibration that reciprocates in the arc direction 57 about the center of gravity G, the kinetic energy transmitted to the vehicle body 25 by the shearing force is extremely small. Even if an impact sound and an impact vibration are generated by colliding with the stopper 51, they are not transmitted to the vehicle body 25.

Further, in order to maximize the kinetic energy generated when the iron core 27 collides with the stopper 51,
As shown in FIG. 3B, it is preferable to dispose the stopper 51 on the normal line passing through the center of gravity G.

Thus, in this embodiment (claim 1),
On the plane including the center of gravity G of the box body parallel to the facing surfaces 21a and 21b of the main relay 3, the movement direction 29 of the iron core 27 of the solenoid coil 59 is provided in a direction different from the center of gravity G.
Facing the box 21 of the main relay 3 passing through the center of gravity G 21
an insulator 23a for supporting a fulcrum on a, 21b,
23b (elastic body) is arranged, and the insulators 23a, 2
3b to connect the box body of the main relay 3 to the vehicles 25a, 25
Since it is configured so as to be attached to b, the impact sound and the impact vibration of the iron core 27 generated every time the main relay 3 is intermittently controlled are converted into rotational motion centered on the center of gravity G of the box body of the main relay 3. As a result, the shock noise and shock vibration can be prevented from being transmitted to the vehicle. Therefore, the driver can be provided with a comfortable driving space.

In this embodiment, the main relay 3 is directly connected to the vehicles 25a, 25b by the insulators 23a, 23b.
Although the case where the main relay 3 is attached via the b is described, the main relay 3 may be attached to the relay box 1. In this case, the impact sound of the iron core 27 generated every time the main relay 3 is intermittently controlled and The shock vibration can be absorbed inside the relay box 1, and the shock noise and shock vibration generated by the main relay 3 can be prevented from being transmitted to the vehicle.

[0031]

According to the present invention, the impact sound and the impact vibration generated by the relay for intermittently controlling the supply of the power to the motor for driving the vehicle from the storage battery provided in the electric vehicle are detected at the center of gravity G of the relay box. Can be converted into a rotational motion and absorbed as a damping vibration, and the impact sound and the impact vibration can be prevented from being transmitted to the vehicle, so that the driver can be provided with a comfortable driving space.

[Brief description of drawings]

FIG. 1 is a main electrical system diagram of an electric vehicle according to the present invention.

FIG. 2 is a perspective view showing that a main relay 3 according to the present invention is attached to a vehicle body of an electric vehicle.

FIG. 3 is a top perspective view (a) and a side perspective view (b) showing that the main relay 3 according to the present invention is attached to a vehicle body of an electric vehicle.

FIG. 4 is a diagram showing a conventional relay mounting structure.

[Explanation of symbols]

 3 Main relays 23a, 23b Insulator 27 Iron core

Claims (1)

[Claims] 1. A relay that has a relay that intermittently controls the supply of power to a motor that drives a vehicle from a storage battery provided in an electric vehicle, and absorbs an impact sound and an impact vibration generated each time the relay is intermittently controlled. In the mounting structure of the relay box, the direction of movement of the iron core of the solenoid coil is provided in a direction different from the center of gravity on a plane including the center of gravity of the box parallel to the facing surface of the relay box, and the relay passing through the center of gravity is provided. A relay mounting structure characterized in that an elastic body supporting a fulcrum on the opposite side of the box body is arranged, and the relay box body is mounted on the vehicle via the elastic body.