JP3747488B2 - Relay mounting structure - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a relay mounting structure that intermittently controls the supply of power to a motor that drives a vehicle from a storage battery provided in an electric vehicle, and in particular, a relay that can absorb shock noise and shock vibration generated by the relay. It relates to the mounting structure.
[0002]
[Prior art]
Conventionally, as shown in FIG. 4, a relay mounting structure is known in which a relay for intermittently controlling the supply of power to a motor driving a vehicle from a storage battery provided in the electric vehicle is mounted on the vehicle.
[0003]
In this device, a relay box 101 is attached to a vehicle 105 via an insulator 103 and a screw 105 using rubber, and a motor that drives the vehicle from a storage battery when the driver turns on the start key of the vehicle. In order to supply power to the relay 101, a current is passed through the solenoid coil 109 of the relay 101, 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 contact 115 moving together with the iron core 111 electrically connects the contact 117a and the contact 117b. As a result, the motor is driven from the wiring 119 on the storage battery side via the contact 117a, the contact 115, and the contact 117b. A very large current flows through the wiring 121 on the inverter side to be controlled.
[0004]
[Problems to be solved by the invention]
However, in the conventional relay mounting structure, the solenoid coil 109 is magnetized and the iron core 111 is attracted. Next, when the iron core 111 collides with the stopper 113 and stops, an impact sound and shock vibration are generated. Therefore, the impact sound and the impact vibration are transmitted to the vehicle 105 via the screw 105 and the insulator 103 positioned in the moving direction of the iron core 111, and the impact vibration is converted into the impact sound by the vehicle, and an extremely large impact sound is generated. There was a problem of giving driver discomfort.
[0005]
Therefore, the present invention absorbs the impact sound and impact vibration generated by the relay that intermittently controls the supply of power to the motor that drives the vehicle from the storage battery provided in the electric vehicle, thereby creating a comfortable driving space for the driver. The object is to provide a relay mounting structure that can be provided.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 has a relay that intermittently controls the supply of power from a storage battery provided in an electric vehicle to a motor that drives the vehicle, and is generated each time the relay is intermittently controlled. In a relay mounting structure for absorbing shock noise and shock vibration, the solenoid is positioned parallel to a pair of opposing faces of the relay box and displaced from the center of gravity on the plane including the center of gravity of the relay box An iron core of the coil is disposed, and the direction of movement of the iron core is different from the direction toward the center of gravity, and the axis that passes through the center of gravity and perpendicular to the pair of faces and the pair of pairs A support portion for the relay box body is provided in the vicinity of the intersection with the facing surface, an elastic body is disposed on the support portion, and the relay box body is attached to the vehicle via the elastic body.
[0007]
[Action]
According to the first aspect of the present invention, the iron core of the solenoid coil is disposed at a position that is parallel to a pair of opposing faces of the relay box and is displaced from the center of gravity on a plane including the center of gravity of the relay box. The direction of movement of the iron core is different from the direction toward the center of gravity, and the vicinity of the intersection of the pair of facings with an axis passing through the center of gravity and perpendicular to the pair of facings. Generated each time the relay is controlled intermittently because a support is provided for the relay box, and an elastic body is disposed on the support and the relay box is attached to the vehicle via the elastic body. The impact sound and the impact vibration of the iron core to be converted can be converted into a rotational motion around the center of gravity of the relay box and absorbed, and the impact sound and the impact vibration can be prevented from being transmitted to the vehicle.
[0008]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0009]
First, the configuration of an electric system from a storage battery of an electric vehicle to a motor will be described.
[0010]
FIG. 1 is a main electric system diagram of an electric vehicle according to the present invention.
[0011]
The relay box 1 has a main relay 3, a relay 5, and a relay 7, and intermittently controls a very large current supplied from the battery 9 and supplies it to the inverter 11, the DC / DC 13, and the auxiliary function 15.
[0012]
The battery 9 is a storage battery for supplying a very large current mainly to a motor 17 that drives a vehicle of an electric vehicle.
[0013]
The main relay 3 intermittently controls a very large current supplied from the battery 9 and supplies it to the inverter 11 and supplies it to the DC / DC 13 and the auxiliary function 15 via the relay 5 and the relay 7.
[0014]
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.
[0015]
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 rotational speed of the motor 17. An electric vehicle is generally configured to generate a PWM waveform corresponding to the frequency of the alternating current on the basis of a braking command signal such as an accelerator or a brake, and to control the inverter 11 by this PWM waveform. The
[0016]
The motor 17 rotates at a rotational speed corresponding to the frequency of the alternating current supplied from the inverter 11 and drives the electric vehicle.
[0017]
The DC / DC 13 converts a direct current supplied from the battery 9 into an alternating current, and then converts the direct current into a direct current again. Then, the DC / DC 13 is a 12V direct current power source that is relatively insensitive to instantaneous fluctuations and voltage fluctuations of the primary side input. To supply.
[0018]
The auxiliary function 15 is an auxiliary function for safely driving an electric vehicle such as a wiper, a horn, or a headlight.
[0019]
Next, FIG. 2 is a perspective view showing that the main relay 3 according to the present invention is attached to the body of the electric vehicle.
[0020]
As shown in the perspective view of FIG. 2, insulators 23a and 23b formed of rubber or resin are arranged at fulcrums on the opposite faces 21a and 21b of the relay box so as to pass through the center of gravity G of the main relay 3. The box of the main relay 3 is attached to the vehicle bodies 25a and 25b via the insulators 23a and 23b.
[0021]
Here, the iron core 27 of the solenoid coil is separated from the center of gravity G as shown in FIG. 2 on a 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. The direction of movement 29 of the iron core 27 of the solenoid coil is provided in the direction.
[0022]
On the upper surface of the main relay 3, wirings 33 a and 33 b connected to the battery 9 are attached by screws 31, while wirings 33 c and 33 d are connected to the inverter 11.
[0023]
Next, 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 the body of the electric vehicle.
[0024]
As shown in the top perspective view of FIG. 3A, the iron core 27 of the solenoid coil is disposed 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 provided in the vertical direction. Next, insulators 23a and 23b are arranged via screws 43a and 43b at fulcrums on the facing surfaces 21a and 21b of the relay box so as to pass through the center of gravity G of the main relay 3, and via the insulators 23a and 23b. The box of the main relay 3 is attached to the vehicle bodies 25a and 25b with screws 41a and 41b using shearing force.
[0025]
Next, as shown in the side perspective view of FIG. 3B, the iron core 27 of the solenoid coil 59 is disposed 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 set to the vertical direction. 29. Here, when a current is passed through the solenoid coil 59 and the iron core 27 is attracted, the iron core 27 moves upward to collide with the stopper 51 and stop. At this time, the contact 53 moving together with the iron core 27 electrically connects the contact 55a and the contact 55b. As a result, the motor 17 is connected from the wiring 33 of the battery 9 via the contact 55a, the contact 53 and the contact 55b. A very large current flows through the wiring on the inverter 11 side that controls the driving of the inverter 11.
[0026]
Next, the movement when the main relay 3 is intermittently controlled will be described with reference to a side perspective view including the center of gravity shown in FIG.
[0027]
As shown in FIG. 3B, when a current is passed through 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 sound and an impact. Generate vibration and stop. 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 through the stopper 51. Next, the main relay 3 reciprocates in the arc direction 57 around the center of gravity G. Here, as shown in FIG. 3 (a), the main relay 3 is attached to the vehicle bodies 25a and 25b via the insulators 23a and 23b by a shearing force. A damped vibration reciprocating to 57 is performed, and it stops with time. Further, since the kinetic energy of the main relay 3 is converted into a damped vibration that reciprocates in the arc direction 57 around the center of gravity G, the kinetic energy transmitted to the vehicle body 25 by shearing force is extremely small. Even if it collides with the stopper 51 and generates impact sound and impact vibration, it is not transmitted to the vehicle body 25.
[0028]
Further, in order to maximize the absorption of the kinetic energy generated when the iron core 27 collides with the stopper 51, the stopper 51 is arranged on the normal line passing through the center of gravity G as shown in FIG. It is preferable.
[0029]
Thus, in this embodiment (Claim 1), the iron of the solenoid coil 59 is arranged in a direction different from the center of gravity G on a plane including the center of gravity G of the box parallel to the facing surfaces 21a and 21b of the main relay 3. While providing the movement direction 29 of the core 27, insulators 23a and 23b (elastic bodies) that support fulcrums on the facing surfaces 21a and 21b of the box of the main relay 3 that passes through the center of gravity G are arranged, and the insulators 23a and 23b are arranged. Since the box of the main relay 3 is attached to the vehicles 25a and 25b, the impact sound and the shock vibration of the iron core 27 generated each time the main relay 3 is intermittently controlled are transmitted to the box of the main relay 3. It can be converted into a rotational motion around the center of gravity G and absorbed as a damped vibration, and the impact sound and the shock vibration can be prevented from being transmitted to the vehicle. For this reason, a comfortable driving space can be provided to the driver.
[0030]
In this embodiment, the case where the main relay 3 is directly attached to the vehicles 25a and 25b via the insulators 23a and 23b has been described. However, the main relay 3 may be attached to the relay box 1, In this case, the impact sound and impact vibration of the iron core 27 generated each time the main relay 3 is intermittently controlled can be absorbed inside the relay box 1, and the impact sound and impact vibration generated by the main relay 3 are transmitted to the vehicle. Can be prevented.
[0031]
【The invention's effect】
According to the present invention, the impact sound and vibration generated by the relay for intermittently controlling the supply of power to the motor driving the vehicle from the storage battery provided in the electric vehicle are rotated around the center of gravity G of the relay box. It can be converted into motion and absorbed as damped vibration, and impact sound and shock vibration can be prevented from being transmitted to the vehicle, so that a comfortable driving space can be provided to the driver.
[Brief description of the drawings]
FIG. 1 is a main electric 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 the vehicle body of an electric vehicle.
FIG. 4 is a diagram showing a conventional relay mounting structure.
[Explanation of symbols]
3 Main relay 23a, 23b Insulator 27 Iron core

Claims (1)

In a relay mounting structure that has a relay that intermittently controls the supply of power to a motor that drives the vehicle from a storage battery provided in the electric vehicle, and that absorbs shock noise and shock vibration generated each time the relay is intermittently controlled.
An iron core of a solenoid coil is disposed at a position parallel to a pair of opposing faces of the relay box and displaced from the center of gravity on a plane including the center of gravity of the relay box, and the direction of movement of the iron core is determined. While different from the direction toward the center of gravity,
A support portion of the relay box body is provided in the vicinity of the intersection point between the axis line passing through the center of gravity and perpendicular to the pair of facing surfaces and the pair of facing surfaces, and an elastic body is disposed on the supporting portion, A relay mounting structure, wherein the relay box is mounted on a vehicle via an elastic body.

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