JP2015157534A - Mounting structure of on-vehicle device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the deformation of a power controller in a head-on collision of a vehicle.SOLUTION: A power controller 14 is fixedly mounted on a tray 20 via mounting brackets 22. In a vehicle collision, the power controller 14 moves rearward integrally with the mounting brackets 22 by being guided by the tray 20 in response to an impact applied from the front. A contact surface 58 is provided on the tray 20 so that the mounting brackets 22 come into contact with the contact surface 58 before the collision of the power controller 14 with an HV reservoir tank 26 arranged backward. The contact of the mounting brackets 22 with the contact surface 58 can suppress the movement of the power controller 14, to avoid the collision of the power controller 14 with the HV reservoir tank 26 or to reduce the impact in collision.

Description

  The present invention relates to a structure for mounting an in-vehicle device on a vehicle, and particularly to a mounting structure for an in-vehicle device that controls the behavior of the in-vehicle device at the time of a collision.

  When a vehicle collides, a technique for deforming a part of the vehicle body to absorb the energy of the collision and reducing the influence on the passenger compartment is known and put into practical use. When a part of the vehicle body is deformed at the time of a collision, a part of the vehicle body that is deformed by a device mounted on the vehicle (hereinafter referred to as an in-vehicle device) may collide, and the in-vehicle device may be deformed. In order to prevent deformation of the in-vehicle device, a technology is known in which when the in-vehicle device receives a force from the deforming vehicle body, the vehicle-mounted device is released from being fixed to the vehicle body and guided while moving.

  Patent Document 1 below, particularly paragraph 0028, describes the control of the motion of the inverter (201) at the time of a collision. When an impact force (F) due to a collision acts on the inverter fixed on the tray (202), the inverter separates from the tray and moves obliquely upward along the tray (202). This prevents the inverter from being damaged by the impact force at the time of the collision and the collision to the partition wall (110) of the inverter. The following Patent Document 2 also describes an inverter (30) that moves along an inverter tray (20) at the time of a collision. In addition, the code | symbol in () is a code | symbol used by the following patent document, and is not related with the code | symbol used by embodiment of this application.

JP 2011-126363 A JP 2013-086881 A

  In order to prevent deformation of the in-vehicle device due to the force from the vehicle body that is deformed at the time of collision, when the in-vehicle device is released and moved, the in-vehicle device collides with other parts of the vehicle body if this movement amount is large. It may be deformed.

  An object of the present invention is to control the movement of an in-vehicle device after the fixation of the in-vehicle device is released, and to reduce an impact when the vehicle device collides with a vehicle body or another device fixed to the vehicle body.

  The mounting structure of the in-vehicle device of the present invention includes the in-vehicle device and a tray on which the in-vehicle device is fixedly mounted. When the vehicle collides, the in-vehicle device is released from being fixed to the tray, and the tray guides the in-vehicle device whose release is released to move along the tray. The tray is provided with a contact portion that contacts the in-vehicle device moving along the tray and suppresses the movement of the in-vehicle device.

  The in-vehicle device can include an in-vehicle device body and a mounting bracket that is fixed to both the in-vehicle device body and the tray. The mounting bracket is released from being fixed to the tray in the event of a collision, thereby enabling the in-vehicle device to move. The mounting bracket is provided with a contact portion that contacts the contact portion of the tray, and the kinetic energy of the in-vehicle device is reduced by the contact between the contact portion and the contact portion.

  The contact portion of the tray can be formed as a surface that is inclined with respect to the moving direction of the in-vehicle device.

  The contact portion of the mounting bracket can be formed as a surface having an inclination substantially parallel to the inclination of the contact portion of the tray.

  The contact portion of the tray can be brought into contact with the in-vehicle device before the in-vehicle device collides with the vehicle body or another device fixed to the vehicle body.

  The in-vehicle device may be a power control device that transmits and receives power to and from a motor for driving a vehicle. The tray may be provided with the rear part higher than the front part. The other device fixed to the vehicle body on which the in-vehicle device collides may be one or both of the coolant reservoir tank and the brake fluid reservoir tank of the power control device.

  By restraining the movement of the in-vehicle device that moves after being released from being fixed at the time of the collision, the impact when colliding with the vehicle body or other parts fixed to the vehicle body is reduced, or deformation of the in-vehicle device is prevented.

It is a figure which shows arrangement | positioning of the vehicle equipment in an engine room, especially the mounting structure of an electric power control apparatus. It is a disassembled perspective view of an electric power control apparatus, a mounting bracket, and a tray.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an arrangement of in-vehicle devices in an engine room 10 of a hybrid vehicle. The in-vehicle devices shown in the figure are the power control device 14 integrated with the mounting bracket 22, the HV reservoir tank 26, the brake reservoir tank 28, the radiator support member 34, and the like. Details of each in-vehicle device will be described later. In the following description, the terms representing front, rear, left, right, up, and down directions represent directions with reference to the vehicle unless otherwise specified. The left-right direction in FIG. 1 is the front-rear direction of the vehicle, and the left side is the front.

  The vehicle of this embodiment is a so-called front engine vehicle in which the engine compartment 10 is located in front of the passenger compartment 12. The engine room 10 houses a power unit including a motor for driving the vehicle. In the case of a hybrid vehicle, the power unit includes an internal combustion engine and an electric motor as a prime mover. Further, the power unit may have a configuration in which an internal combustion engine and a transmission are combined. An electric motor for driving a vehicle (hereinafter simply referred to as an electric motor) can be provided in the transmission. Electric power is supplied to the electric motor from a driving battery mounted on the vehicle. When the electric motor is caused to function as a generator, the generated electric power is charged into the driving battery.

  Transmission / reception of electric power between the electric motor and the driving battery is controlled by the electric power control device 14. When the electric motor is a three-phase AC motor, the power control device 14 includes an inverter, and the inverter converts DC power from the driving battery into three-phase AC power and supplies it to the motor. The inverter converts the three-phase AC power generated by the electric motor into DC power and charges the drive battery. The power control device 14 may include a booster that boosts the voltage supplied from the driving battery and supplies the boosted voltage to the inverter. Furthermore, the power control device 14 may include a step-down device, for example, a DC-DC converter, for stepping down the voltage of the driving battery and supplying power to the electrical equipment. On-board electrical equipment such as lights such as headlamps, acoustic equipment, route guidance devices, and electronic control units (ECUs) has the same voltage (for example, 12V) as that of a conventional vehicle having only an internal combustion engine as a driving motor. ). This voltage is lower than the voltage supplied to the motor for driving the vehicle, and a step-down device is provided to adapt this voltage to the electrical equipment. Further, the power control device 14 may include a control circuit for controlling the inverter, the booster, and the step-down device.

  In addition, a cooler can be provided in the power control device 14 to cool the inverter, booster, and the like. The cooler can be liquid-cooled, and cools the inverter or the like by circulating the coolant between the radiator and a separately provided radiator.

  The power control device 14 integrates the above-described inverter, booster, step-down device, control circuit and cooler in a metal case, preferably an aluminum case. The shape of the case may be roughly a rectangular parallelepiped.

  The power control device 14 is fixed to the vehicle body, more specifically, to the front side member 16. A tray 20 is fixed on the front side member 16 via a fixing leg 18. On the tray 20, the power control device 14 integrated with the mounting bracket 22 is fixedly placed. The placement of the power control device 14 will be described in detail later.

  An engine mount 24 that supports the power unit is fixedly arranged behind the fixed leg 18 on the front side member 16. Above the engine mount 24, an HV reservoir tank 26 and a brake reservoir tank 28 are fixedly disposed with respect to a vehicle body, for example, a partition wall 30 that separates the engine compartment 10 and the passenger compartment 12. As a specific example, the HV reservoir tank 26 and the brake reservoir tank 28 are supported by a reservoir support member 32 fixed to the partition wall 30. The HV reservoir tank 26 stores the coolant supplied to the cooler of the power control device 14 described above, supplies the coolant that is deficient in the piping circulating through the cooler and the radiator to the piping, and surplus in the piping. Accept the resulting coolant. The brake reservoir tank 28 stores brake fluid that is a force transmission medium in the braking device of the vehicle. The brake reservoir tank 28 supplies brake fluid that is insufficient in the brake pipe, and surplus brake fluid in the pipe is received by the brake reservoir tank 28.

  A radiator support member 34 is coupled to the front end of the front side member 16. The radiator support member 34 is a frame-shaped member, and is an engine radiator through which the coolant of the internal combustion engine disposed inside the frame flows, and a radiator (HV radiator) through which the coolant used in the cooler of the power control device 14 flows. ) And support.

  FIG. 2 is an exploded perspective view of the power control device 14, the tray 20, and the pair of mounting brackets 22. The pair of mounting brackets 22 extend along the lower sides of the left and right side surfaces of the power control device 14 and are attached thereto. The mounting bracket 22 can be manufactured by pressing a sheet metal, and has a substantially L shape when viewed from the front. When attached to the power control device 14, a portion corresponding to an L-shaped vertical image (hereinafter referred to as a vertical portion 36) runs along the side surface of the power control device 14 and corresponds to an L-shaped horizontal image (hereinafter referred to as a vertical image). , Which is referred to as a horizontal portion 38) is located so as to wrap around the power control device. The vertical portion 36 is provided with a through hole, and the mounting bracket 22 is attached to the side surface of the power control device 14 by a bolt 40 that passes through the vertical portion 36 and is screwed into a screw hole provided on the side surface of the power control device 14. . The mounting bracket 22 of this embodiment is composed of two parts that make a pair, but it can also be constructed integrally.

  The tray 20 is generally plate-shaped, and is inclined so that the front is low and the rear is high as a whole. Two ribs 42 extending in the front-rear direction are provided on the upper surface of the tray 20, and plate-like portions 44 are provided on the left and right sides of the ribs 42. Bolts 46 are fixed to the left and right ends in front of the tray 20. The bolt 46 can be fixed by welding or caulking. Through holes 48 are formed on the left and right sides of the rear portion of the plate-like portion 44, and nuts (not shown) are fixed to the back surface thereof. This nut can be fixed by welding or caulking.

  Corresponding to the bolt 46 at the front end of the tray 20, a U-shaped cut (hereinafter referred to as a front U-shaped notch 50) opened forward is formed at the front end portion of the horizontal portion 38 of the mounting bracket. The mounting bracket 22 is placed so that the bolt 46 passes through the front U-shaped notch 50, and the nut 52 is screwed to the bolt 46 in this state. As a result, the front end portion of the horizontal portion 38 of the mounting bracket is sandwiched between the tray 20 and the nut 52 and fixed to the tray 20. Corresponding to the through hole 48 in the rear portion of the tray 20, a U-shaped notch (hereinafter referred to as a rear U-shaped notch 54) opened forward is formed at the rear end portion of the lateral portion 38 of the mounting bracket. Is formed. The bolt 56 passes through the rear U-shaped notch 54 from above and is screwed to a nut provided on the back surface of the through hole 48. As a result, the rear end portion of the horizontal portion 38 of the mounting bracket is sandwiched between the tray 20 and the head of the bolt 56 and fixed to the tray 20. As described above, the power control device 14 is fixedly placed on the tray 20 via the mounting bracket 22.

  Between the bolt 46 and the through hole 48 of the plate-like portion 44 of the tray, a surface 58 having a different inclination from the front and rear portions thereof is provided. Surfaces before and after the surface 58 having different inclinations are referred to as a tray general surface 60. As well shown in FIG. 1, the surface 58 is inclined more than the tray general surface 60. When the vehicle collides from the front, the surface 58 comes into contact with the power control device 14 and suppresses its movement. By this contact, the impact when the power control device 14 collides with another part of the vehicle body is reduced, mitigated, or prevented from colliding. The impact reduction will be described in detail later. Hereinafter, this surface is referred to as a contact surface 58.

  Between the front U-shaped notch 50 and the rear U-shaped notch 54 of the lateral portion 38 of the mounting bracket, a surface 62 having a different inclination from the front and rear portions is provided. The front and rear portions of the surface 62 having different inclinations are referred to as a bracket general surface 64. As well shown in FIG. 2, the surface 62 is inclined more than the bracket general surface 64. The surface 62 comes into contact with the contact surface 58 when the vehicle collides from the front. Hereinafter, this surface is referred to as a contact surface 62.

  The connection between the tray 20 and the mounting bracket 22 uses the U-shaped notches 50 and 54 opened forward as described above. For this reason, when a large force is applied to the power control device 14 from the front, the mounting bracket 22 held between the tray 20 and the nut 52 or the bolt 56 comes out from here, and the fixing is released.

  Returning to FIG. 1, the description will be continued. (A) shows the state before the vehicle collides from the front, and (b) shows the state after the collision. When the vehicle collides from the front, the front end portion of the vehicle body is deformed so as to be crushed, and this deformation may reach the power control device 14 in some cases. When force F is applied from the vehicle body that is deformed to the power control device 14, the case of the power control device 14 may be deformed. Since the power control device 14 includes a device to which a high voltage is supplied, such as an inverter, it is desirable to eliminate the deformation of the case. In the power control device 14, the force applied to the power control device 14 is reduced by the front and rear U-shaped notches 50 and 54 provided in the mounting bracket 22. The mounting bracket 22 is fixed to the tray 20 with the edge portions of the front and rear U-shaped notches 50 and 54 sandwiched between the tray 20 and nuts 52 or bolts 56. When a large force is applied to the power control device 14 from the front, the mounting bracket 22 also transmits the force. When this force exceeds the force fixing the mounting bracket 22, the mounting bracket 22 moves rearward. At this time, since the openings of the front and rear U-shaped notches 50 and 54 are opened forward, the bolts 46 and 56 are removed from the openings, and the mounting bracket 22 is unfixed. As a result, the power control device 14 moves rearward together with the mounting bracket 22.

  The rearward movement of the power control device 14 is guided by the upper surface of the tray 20. More specifically, it is guided along the tray general surface 60 and the upper end surface of the rib 42. As described above, the rear side of the tray 20 is high, and the power control device 14 moves upward as it moves backward. Thereby, the electric power control apparatus 14 is induced | guided | derived above the engine mount 24, and the collision with the engine mount 24 is avoided.

  An HV reservoir tank 26 and a brake reservoir tank 28 are located behind the power control device 14 and above the engine mount 24. When the power control device 14 moving rearward collides with these tanks 26 and 28, the case of the power control device 14 may be deformed by the impact. Although the two tanks 26 and 28 are made of resin, high rigidity is given by reinforcing them with ribs in order to withstand the pressure difference between the inside and outside caused by expansion of the liquid inside. In addition, although the resin has a lower rigidity than aluminum, the rigidity may be higher than that of aluminum when a support member that supports the tanks 26 and 28 is included. For these reasons, when the power control device 14 collides with the HV reservoir tank 26 and the brake reservoir tank 28, the case may be deformed. A contact surface 58 is provided on the tray 20 so that the power control device 14 does not collide with the HV reservoir tank 26 and the brake reservoir tank 28, or in order to reduce deformation of the case even if it collides.

  The power control device 14 released from being fixed to the tray 20 is integrated with the mounting bracket 22 and is guided by the tray 20 to move backward and upward. During this movement, the contact surface 62 of the mounting bracket contacts the contact surface 58 of the tray. The state at this time is shown in FIG. The contact surface 58 is inclined with respect to the moving direction of the power control device 14 and faces the moving power control device 14. The contact surface 62 can be provided so as to be substantially parallel to the contact surface 58.

  When the mounting bracket 22 hits the tray 20, the kinetic energy of the moving power control device 14 is reduced, and the movement is suppressed. If the force F applied to the power control device 14 is small, the power control device 14 is stopped in a state where the contact surface 62 is in contact with the contact surface 58, and collision with the HV reservoir tank 26 and the brake reservoir tank 28 is avoided. it can. When the applied force is large, the power control device 14 moves over the contact surface 58 and moves further rearward. However, when the power control device 14 contacts the contact surface 58, the speed is reduced and the speed toward the rear is reduced. As a result, the impact when colliding with the tanks 26 and 28 is reduced, and deformation of the case of the power control device 14 is suppressed.

  In this embodiment, as shown, the contact surface 58 and the contact surface 62 are formed in a substantially flat surface, but either one or both may be formed in another shape such as a curved surface or a protrusion. Further, the contact surface can be provided at a portion other than the mounting bracket 22. In addition to the member to which the power control device 14 is fixed, a member guided by the power control device 14 may be provided, and a contact surface may be provided on this member. Although the HV reservoir tank 26 and the brake reservoir tank 28 have been described as the in-vehicle devices with which the power control device 14 may collide, the present invention is applied even when the in-vehicle device or the vehicle body other than these is a target to collide with. Thus, deformation of the case of the power control device 14 can be suppressed.

  Since the power control device 14 and the mounting bracket 22 move together when the vehicle collides, they can be regarded as an in-vehicle device as a whole. Further, a guide member for guiding the in-vehicle device that is moved after being fixed is provided. In the above-described embodiment, the tray 20 functions as a guide member. The in-vehicle device moves along the guide member, contacts the contact portion provided on the guide member during the movement, the movement amount is suppressed, and the kinetic energy is reduced. Thereby, it is avoided that the vehicle-mounted device collides with the vehicle body or other devices fixed to the vehicle body, or even if the vehicle device collides, the impact can be reduced.

  10 engine compartment, 14 power control device, 20 tray, 22 mounting bracket, 24 engine mount, 26 HV reservoir tank, 28 brake reservoir tank, 34 radiator support member, 50 front U-shaped notch, 54 rear U-shaped notch, 58 contact surface 62 Contact surface.

Claims (6)

In-vehicle equipment,
A tray on which the in-vehicle device is fixedly mounted, and the tray that guides the in-vehicle device that is released from being fixed along with the collision of the vehicle to move along the tray,
Have
The tray is provided with a contact portion that contacts the in-vehicle device that moves along the tray and suppresses the movement of the in-vehicle device.
Mounting structure for in-vehicle equipment. It is a mounting structure of the vehicle equipment according to claim 1,
The in-vehicle device includes an in-vehicle device main body, and a mounting bracket fixed to the in-vehicle device main body and fixed to the tray so as to be released at the time of a vehicle collision,
The mounting bracket is provided with a contact portion that contacts the contact portion of the tray.
Mounting structure for in-vehicle equipment.   3. The mounting structure for an in-vehicle device according to claim 1, wherein the contact portion of the tray is formed as a surface inclined with respect to the moving direction of the in-vehicle device.   4. The mounting structure for an in-vehicle device according to claim 3, wherein the contact portion of the mounting bracket is formed as a surface having an inclination substantially parallel to the inclination of the contact portion of the tray.   5. The on-vehicle device mounting structure according to claim 1, wherein the contact portion of the tray contacts the in-vehicle device before the in-vehicle device collides with the vehicle body or another device fixed to the vehicle body. In-vehicle device mounting structure. The in-vehicle device mounting structure according to claim 5,
The in-vehicle device is a power control device that transmits and receives power to and from a motor for driving a vehicle.
The tray is arranged with the rear part higher than the front part and displaces the in-vehicle equipment that moves from the engine mount located behind the tray,
The other device on which the vehicle body collides with the in-vehicle device is one or both of the coolant reservoir tank and the brake fluid reservoir tank of the power control device.
Mounting structure for in-vehicle equipment.

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