JP2019038412A - Protection structure for on-vehicle apparatus - Google Patents

Abstract

To prevent occurrences of damage to an on-vehicle apparatus and function failure due to collision of apparatuses in an engine compartment in the event of such a vehicle front part collision that the engine compartment deforms.SOLUTION: A protection structure is disposed in an engine compartment in a vehicle front part, and protects an on-vehicle apparatus having a positional relation in which, in a case where the engine compartment is deformed in the event of a vehicle front collision, they come into contact with each other. The protection structure comprises: a reaction force plate 6 provided in an engine 5 and having an abutting surface 6a directed toward a high-voltage inverter 3 and inclining with respect to a horizontal surface; an inclination surface 8 formed on the high-voltage inverter 3 and inclining so as to face the abutting surface 6a; and a bracket 7 having an inclination plate part 7d inclining between the abutting surface 6a and the inclination surface 8 so as to face both of them, the bracket being mounted on the high-voltage inverter 3 such that a space 10 is formed between the inclination plate part 7d and the inclination surface 8. When a load equal to or larger than a predetermined value is input, the bracket 7 may deform such that the inclination plate part 7d becomes closer to the inclination surface 8.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a protection structure for an in-vehicle device, and particularly relates to a protection structure for an in-vehicle device arranged in an engine compartment provided in a front portion of a vehicle.

  Conventionally, various structures for protecting an in-vehicle device disposed in an engine compartment (also referred to as an engine room) provided in a vehicle front portion from an impact at the time of a vehicle front portion collision have been proposed.

  For example, in Patent Document 1, an inverter tray that is provided below an inverter in a power unit room and is inclined upward as it goes backward, and attached to the inverter and the inverter tray, is detached from the inverter tray due to a collision load from the front. In-vehicle device mounting structure in which an inclination portion that is inclined upward as it goes rearward is formed at a portion where the bottom portion of the removal bracket and the upper surface of the inverter tray face each other. Is disclosed.

  According to this Patent Document 1, when the inverter and the detachable bracket are moved rearward due to a collision load from the front, if the inclined portion of the detachable bracket comes into contact with the inclined portion of the inverter tray, the inverter and the detachable bracket are arranged. Is moved rearward and upward along the inclined portion of the inverter tray, so that contact between the bottom portion of the inverter and the inverter tray can be suppressed as much as possible.

JP, 2015-123773, A

  However, in the above-mentioned Patent Document 1, depending on the angle and magnitude of the collision load, when the inclined portion of the detaching bracket comes into contact with the inclined portion of the inverter tray, a large bottom load is applied via the detaching bracket. Is input to the inverter, and there is a problem that the inverter is damaged or malfunctions.

  Thus, such a problem is not limited to the inverter and the inverter tray, and is generally placed in the engine compartment, and in general equipment that is in a positional relationship that abuts each other when the engine compartment is deformed at the time of a vehicle front collision. It can happen.

  The present invention has been made in view of such points, and the object of the present invention is to prevent damage or function of in-vehicle devices due to collision between devices in the engine compartment at the time of a vehicle front collision in which the engine compartment is deformed. The object is to provide a technique for suppressing the occurrence of defects.

  In order to achieve the above object, in the protection structure for an in-vehicle device according to the present invention, among devices in a positional relationship that abut against each other at the time of a vehicle front collision, one device is provided with a member having an inclined surface and the other device Provide a bracket that can absorb collision energy and an inclined surface, reduce the load with the bottom with the bracket, and then slide both devices relatively along the inclined surface that abuts to deflect the contact load. I have to.

  Specifically, the present invention provides a first device and a first device that are disposed in an engine compartment provided at the front portion of the vehicle, and that are in contact with each other when the engine compartment is deformed in the event of a vehicle front collision. It covers the protection structure of in-vehicle devices that protects two devices.

  And the protection structure of this vehicle equipment is provided in the said 2nd apparatus, the load receiving member which has the contact surface which inclines with respect to the said 1st apparatus side and is inclined with respect to a horizontal surface, and the said contact surface is opposed. An inclined surface formed on the first device itself, and an inclined plate portion inclined between the contact surface and the inclined surface so as to face both the inclined plate portion and the And a bracket that is attached to the first device so that a space is formed between the inclined surface and the bracket. When a load is input, the inclined plate portion is configured to be deformed so as to approach the inclined surface.

  In the present invention, “at the time of a vehicle front collision” means a vehicle collision in such a manner that the engine compartment provided in the vehicle front is deformed, and not only a frontal collision but also a side collision or offset with respect to the vehicle front. This includes collisions and oblique collisions.

  According to this configuration, when the engine compartment is deformed at the time of a vehicle front collision and the first device and the second device approach each other, first, the inclined plate portion of the bracket attached to the first device and the second device are provided. The contact surface of the received load receiving member comes into contact (contact).

  Then, when the contact load between the first device and the second device is relatively small (when a load less than a predetermined value is input to the inclined plate portion), the inclined plate portion is inclined with respect to the horizontal plane. However, since it slides relatively along the contact surface which is also inclined with respect to the horizontal plane, and the first device and the second device avoid vertically, the contact load can be diverted. Thereby, when the contact load is relatively small, it is possible to avoid the damage of the first device and the second device due to the collision between the devices and the occurrence of a functional failure.

  On the other hand, when the contact load between the first device and the second device is relatively large (when a load of a predetermined value or more is input to the inclined plate portion), between the inclined surface of the first device and the inclined plate portion. When the bracket is deformed so that the inclined plate portion comes close to the inclined surface with the space as a stroke space, the collision energy is absorbed. As a result, when the stroke is used up and the contact surface of the load receiving member provided in the second device comes into contact with the inclined surface formed in the first device via the inclined plate portion of the bracket, it remains already. Since the collision energy is small, the bottom load on the first device can be reduced. In addition, the inclined surface that is inclined with respect to the horizontal plane slides relatively along the contact surface that is also inclined with respect to the horizontal plane via the inclined plate portion of the bracket attached to the inclined surface. Since 1 apparatus and 2nd apparatus avoid up and down, a contact load can be trained. Thereby, even when the contact load is relatively large, it is possible to avoid the damage of the first and second devices and the occurrence of functional malfunctions due to the collision between the devices.

  As described above, according to the protection structure for an in-vehicle device according to the present invention, at the time of a vehicle front collision in which the engine compartment is deformed, the in-vehicle device is damaged or malfunctions due to the collision between the devices in the engine compartment. Generation | occurrence | production can be suppressed.

It is a figure which shows typically the high voltage inverter and engine which were provided in the engine compartment which have the protection structure of the vehicle equipment which concerns on embodiment of this invention. It is sectional drawing which shows a high voltage inverter typically. It is a perspective view which shows typically the bracket attached to the high voltage inverter. It is a figure which illustrates typically the state in the engine compartment at the time of a vehicle front part collision. It is a figure which illustrates typically the behavior at the time of contact of the bracket attached to the high voltage inverter and the reaction force plate provided in the engine. It is a graph which shows typically the time change of the contact load of a bracket and a reaction force board.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

-Positional relationship of in-vehicle devices-
FIG. 1 is a diagram schematically showing a high-voltage inverter 3 and an engine 5 provided in an engine compartment 1 having a protection structure for on-vehicle equipment according to the present embodiment. The engine compartment 1 is provided in the front part of the vehicle, and the rear part thereof is partitioned from the passenger compartment by a dash panel (not shown). In the engine compartment 1, various in-vehicle devices (devices) such as a controller for the high-voltage inverter 3 and the engine 5 are mounted. FIG. 1 is a view of the engine compartment 1 as viewed from the rear (vehicle compartment side), and reference numeral 2 in FIG. 1 indicates a radiator support.

  The high-voltage inverter (first device) 3 is disposed in the engine compartment 1 on the front side and on the left side in the vehicle width direction, and is supported from below by an inverter tray 4 attached to a front member (not shown). . The high-voltage inverter 3 is also connected to the radiator support 2 via a steady rest bracket (not shown).

  The engine (second device) 5 is a V-type engine in which a first bank and a second bank are arranged in a V-shape, and in the engine compartment 1, on the right side in the vehicle width direction with respect to the high-voltage inverter 3, and The high-voltage inverter 3 is disposed below.

  As described above, the high-voltage inverter 3 and the engine 5 arranged in the engine compartment 1 are deformed when the vehicle front collision includes a frontal collision, a side collision with the vehicle front, an offset collision, an oblique collision, and the like. In this case, the high-voltage inverter 3 comes close to the engine 5 while being detached from the inverter tray 4, so that they are in contact with each other.

−Protection structure for in-vehicle devices−
As described above, when the engine compartment 1 is deformed at the time of a vehicle front collision and the high voltage inverter 3 and the engine 5 come into contact with each other, a large bottomed load is input to the high voltage inverter 3. It is assumed that a malfunction will occur.

  Therefore, in the present embodiment, as a protection structure for in-vehicle equipment, a reaction force plate 6 is provided on the engine 5 side, and a bracket 7 and an inclined surface 8 capable of absorbing collision energy are provided on the high voltage inverter 3 side, thereby providing a reaction force plate. 6, the load on the bottom of the high voltage inverter 3 is reduced by the bracket 7, and then the high voltage inverter 3 and the engine 5 are slid relative to each other along the inclined surface 8. (To distract). Hereinafter, the protection structure of the in-vehicle device will be described in detail.

  As shown in FIG. 1, a reaction force plate (load receiving member) 6 is provided on the cylinder head cover 5a of the engine 5 so as to extend toward the high-voltage inverter 3 side. The reaction force plate 6 is formed of, for example, a metal plate such as a steel plate, and has high rigidity so as not to be deformed even when the high voltage inverter 3 collides at the time of a vehicle front collision. The reaction plate 6 is configured such that the upper end portion (upper end surface) thereof is a contact surface 6a that faces the high-voltage inverter 3 side and is inclined with respect to the horizontal plane. In other words, the contact surface 6a of the reaction plate 6 is inclined downward toward the high-voltage inverter 3 side, and the high-voltage inverter 3 is located in the normal direction of the contact surface 6a.

  FIG. 2 is a cross-sectional view schematically showing the high-voltage inverter 3. Although FIG. 2 is a cross-sectional view, only the bracket 7 attached to the high-voltage inverter 3 is hatched for easy understanding of the drawing. As shown in FIG. 2, the high-voltage inverter 3 is opposed to the contact surface 6 a of the reaction force plate 6 in such a manner that a side close to the engine 5 (side on the right side in the vehicle width direction) is chamfered. An inclined surface 8 that is inclined in the direction is formed. In other words, the inclined surface 8 is inclined upward as it goes to the engine 5 side, and is formed in the high-voltage inverter 3 so that the engine 5 is positioned in the normal direction of the inclined surface 8.

  Further, as shown in FIG. 2, the high-voltage inverter 3 is attached with a bracket 7 that is formed by bending a substantially rectangular metal plate such as a steel plate, for example, and is substantially L-shaped when viewed in the vehicle longitudinal direction. Yes. The bracket 7 is attached to the high-voltage inverter 3 and has an upper mounting portion 7a extending vertically and an upper inclined step portion 7b extending inclined toward the engine 5 as it goes downward from the lower end of the upper mounting portion 7a. A vertical plate portion 7c extending downward from the lower end portion of the upper inclined step portion 7b, an inclined plate portion 7d extending inclined toward the high-voltage inverter 3 as going downward from the lower end portion of the vertical plate portion 7c, A lower inclined step 7e extending toward the high-voltage inverter 3 as it goes upward from the lower end of the inclined plate portion 7d, and a lower extending substantially horizontally from the upper end of the lower inclined step 7e toward the high-voltage inverter 3 Side attachment portion 7f.

  FIG. 3 is a perspective view schematically showing the bracket 7 attached to the high-voltage inverter 3. In this bracket 7, the upper mounting portion 7 a is fastened to the upper portion of the high-voltage inverter 3 via two bolts 11, and the lower mounting portion 7 f is fastened to the lower portion of the high-voltage inverter 3 via one bolt 12. As a result, the inclined plate portion 7d is attached to the high-voltage inverter 3 in such a manner as to cover the inclined surface 8. In relation to the high-voltage inverter 3 and the engine 5, the bracket 7 is inclined so that the inclined plate portion 7d faces the both surfaces 6a and 8 between the contact surface 6a and the inclined surface 8, and the inclined plate portion 7d. And the inclined surface 8 are attached to the high-voltage inverter 3 so that a space 10 is formed. That is, the inclined plate portion 7d of the bracket 7 is inclined upward as it goes to the engine 5 side, similarly to the inclined surface 8 of the high-voltage inverter 3, and the engine 5 is positioned in the normal direction of the inclined plate portion 7d. ing.

  Then, the bracket 7 is in contact with the contact surface 6 a of the reaction force plate 6, so that when the load of a predetermined value or more is input to the inclined plate portion 7 d, the inclined plate portion 7 d becomes the inclined surface of the high-voltage inverter 3. The thickness, the bending angle, the rigidity, and the like are set so as to be deformed so as to approach 8 (see FIGS. 5C and 5D).

-Action of protective structure-
Next, the effect | action of the protection structure of the vehicle equipment comprised as mentioned above is demonstrated.

  FIG. 4 is a diagram schematically illustrating a state in the engine compartment 1 at the time of a vehicle front collision. As described above, the high-voltage inverter 3 and the engine 5 arranged in the engine compartment 1 are, for example, a vehicle whose left front portion is in contact with a barrier (not shown), as indicated by a black arrow in FIG. When the engine compartment 1 is deformed, the high-voltage inverter 3 comes into contact with each other by approaching the engine 5 while being detached from the inverter tray 4.

  FIG. 5 is a diagram schematically illustrating the behavior when the bracket 7 attached to the high-voltage inverter 3 and the reaction force plate 6 provided in the engine 5 are in contact (at the time of contact). When the engine compartment 1 is deformed and the high-voltage inverter 3 approaches the engine 5 as shown by the white arrow in FIG. 5A, the bracket 7 as shown in FIG. 5B or FIG. The inclined plate portion 7d comes into contact with the contact surface 6a of the reaction force plate 6.

  First, when the contact load between the high-voltage inverter 3 and the engine 5 is relatively small (when a load less than a predetermined value is input to the inclined plate portion 7d), the inclined plate portion 7d inclined with respect to the horizontal plane is As shown by the black arrow in FIG. 5B, the high-voltage inverter 3 and the engine 5 avoid up and down by sliding relatively upward along the contact surface 6a that is also inclined with respect to the horizontal plane. Therefore (because the high-voltage inverter 3 is disengaged from the upper side of the engine 5), the contact load can be applied (deviated). Thereby, when the contact load is relatively small, damage to the high-voltage inverter 3 and the engine 5 and occurrence of functional malfunctions due to the collision between the high-voltage inverter 3 and the engine 5 can be suppressed.

  On the other hand, when the contact load between the high-voltage inverter 3 and the engine 5 is relatively large (when a load of a predetermined value or more is input to the inclined plate portion 7d), as shown in FIG. With the space 10 between the inclined surface 8 and the inclined plate portion 7d as a space for stroke, the bracket 7 is deformed so that the inclined plate portion 7d approaches the inclined surface 8. Thus, collision energy is absorbed when the bracket 7 is deformed with the space 10 as a space for stroke.

  Then, using the stroke, the contact surface 6 a of the reaction force plate 6 provided in the engine 5 contacts the inclined surface 8 formed in the high-voltage inverter 3 via the inclined plate portion 7 d of the bracket 7. In this case, since the residual collision energy has already been reduced, the bottom load on the high voltage inverter 3 can be reduced.

  In addition, when the contact surface 6a of the reaction force plate 6 contacts the inclined surface 8 via the inclined plate portion 7d, the inclined surface 8 inclined with respect to the horizontal plane is indicated by a black arrow in FIG. As shown, since the high voltage inverter 3 and the engine 5 avoid up and down by sliding relatively upward along the contact surface 6a which is also inclined with respect to the horizontal plane, the contact load can be controlled. Thereby, even when the contact load is relatively large, damage to the high voltage inverter 3 and the engine 5 and occurrence of functional problems due to the collision between the high voltage inverter 3 and the engine 5 can be suppressed.

  FIG. 6 is a graph schematically showing the change over time of the contact load F between the bracket 7 and the reaction force plate 6. The broken line in FIG. 6 shows the time change of the contact load F when the high-voltage inverter 3 and the engine 5 are in direct contact, and the solid lines A and B in FIG. When the high voltage inverter 3 formed with the engine 5 provided with the reaction force plate 6 abuts, in other words, the change with time of the contact load F when the in-vehicle device protection structure of the present embodiment is applied is shown. ing.

  As shown by a broken line in FIG. 6, when there is no protective structure, a relatively large contact load (bottom load) is applied to the high-voltage inverter 3 and the engine 5 in a short time of about 5 (ms). It turns out that it joins rapidly. When such a relatively large bottomed load acts suddenly, the high-voltage inverter 3 and the engine 5 may be damaged or malfunction.

  On the other hand, as shown by the solid line A in FIG. 6, when the on-vehicle equipment protection structure of the present embodiment is applied, first, the bracket 7 having a lower rigidity than the high-voltage inverter 3 and the reaction force plate 6 are provided. By contact, the peak load is significantly reduced during a relatively long time of about 10 (ms) (see the white arrow in FIG. 6), and the high voltage inverter 3 is distributed so that a relatively small contact load is dispersed. It can be seen that the engine 5 is added. Then, after the stroke is used up, as shown by the solid line B in FIG. 6, the contact load (bottom load) is further reduced by absorbing the collision energy with the space 10 as the stroke space. It can be seen that the high voltage inverter 3 and the engine 5 are added.

  Moreover, as described above, the inclined surface 8 slides relatively upward along the contact surface 6a via the inclined plate portion 7d, and the high-voltage inverter 3 and the engine 5 avoid up and down, so that the reduction is reduced. Therefore, it is possible to reliably prevent damage to the high-voltage inverter 3 and the engine 5 and occurrence of functional malfunctions.

(Other embodiments)
The present invention is not limited to the embodiments, and can be implemented in various other forms without departing from the spirit or main features thereof.

  In the above embodiment, the present invention is applied to the high-voltage inverter 3 and the engine 5. However, when the engine compartment 1 is arranged in the engine compartment 1 provided at the front part of the vehicle and the engine compartment 1 is deformed when the front part of the vehicle collides. For example, the present invention may be applied to an in-vehicle device other than the engine 5 and the high-voltage inverter 3 as long as the positions are in contact with each other. For example, the in-vehicle device other than the high-voltage inverter 3 and the engine 5 may be applied. The present invention may be applied to the vehicle-mounted device other than the high-voltage inverter 3 and the vehicle-mounted device other than the engine 5.

  Moreover, in the said embodiment, although the space 10 between the inclined surface 8 of the high voltage inverter 3 and the inclined plate part 7d of the bracket 7 was made into a cavity, it is not restricted to this, The inclined surface 8 of the high voltage inverter 3 and the bracket 7 of FIG. The space 10 between the inclined plate portion 7d may be filled with, for example, a urethane-based energy absorbing member (not shown).

  Further, in the above embodiment, the reaction force plate 6 is provided on the engine 5 side, and the bracket 7 and the inclined surface 8 capable of absorbing the collision energy are provided on the high voltage inverter 3 side. A reaction force plate may be provided on the side, and a bracket capable of absorbing collision energy and an inclined surface may be provided on the engine 5 side.

  As described above, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  According to the present invention, it is possible to suppress the occurrence of damage or functional malfunction of in-vehicle equipment due to collision between equipment in the engine compartment at the time of a vehicle front collision that causes deformation of the engine compartment. This is extremely useful when applied to the protection structure of an in-vehicle device disposed in the vehicle.

1 Engine compartment 3 High voltage inverter (first equipment)
5 Engine (second equipment)
6 Reaction plate (load receiving member)
6a Contact surface 7 Bracket 7d Inclined plate portion 8 Inclined surface 10 Space

Claims (1)

Protection of in-vehicle devices that are disposed in engine compartments provided at the front of the vehicle and that protect the first device and the second device that are in contact with each other when the engine compartment is deformed in the event of a vehicle front collision Structure,
A load receiving member provided in the second device, having a contact surface facing the first device side and inclined with respect to a horizontal plane;
An inclined surface formed on the first device itself, which is inclined so as to face the contact surface;
The first apparatus has an inclined plate portion that is inclined between the contact surface and the inclined surface so as to be opposed to each other, and a space is formed between the inclined plate portion and the inclined surface. A bracket to be attached to,
The bracket is configured to deform so that the inclined plate portion approaches the inclined surface when a load of a predetermined value or more is input to the inclined plate portion by contacting the contact surface. A protective structure for in-vehicle equipment.

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