JP2012206627A - Vehicle front structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress damage of an auxiliary engine by reducing a collision load from a higher position than a bumper reinforce or the like applied to the auxiliary engine or the like in vehicle front collision.SOLUTION: The vehicle front structure includes: a tray 30 where the auxiliary engine 29 is placed in a vehicle engine room 5; and a tray pedestal 40 that supports the tray 30 at a higher position than a front side member 10 constituting a vehicle frame and is mounted on the front side member 10. In the front side member 10, a protruding member 20 is fixed at the rear side of the tray pedestal 40 to protrude above with respect to the front side member 10. In the tray pedestal 40, a shock absorbing member 50 for absorbing the collision load is provided by receding with the tray pedestal 40, abutting with the protruding member 20 and deforming when a collision load is applied to the tray pedestal 40 in the vehicle front collision.

Description

  The present invention provides a tray on which an engine accessory is placed in an engine room of a vehicle, a tray base that supports the tray at a position higher than a front side member constituting a skeleton of the vehicle, and is attached to the front side member. It is related with the front part structure of a vehicle provided with.

  As shown in FIG. 8A, a hybrid vehicle using an engine and a motor as drive sources includes an inverter 102 for driving the motor 101 with a battery power source 103 (Patent Document 1). The vehicle described in Patent Document 1 is configured such that the inverter 102 can be supported by an inverter support 105 attached to the front side member 104 as shown in FIG. The inverter support tool 105 includes a mounting portion 105s on which the inverter 104 is mounted and a support portion 105k that supports the mounting portion 105s. The mounting portion 105 s of the inverter support tool 105 is held at a height position substantially equal to the upper surface of the front side member 104 and is bolted to the front side member 104. For this reason, the inverter 102 is disposed at a position higher than the front side member 104.

JP 2009-35181 A

  When a collision load is applied from a position higher than the bumper reinforcement (not shown) and the front side member 104 that supports the bumper reinforcement at the time of a forward collision of the vehicle, the collision load may be directly applied to the inverter 102 and the inverter support 105. is there. As a result, the inverter 102 may be skipped and collide with a suspension tower (not shown) or the like, resulting in significant damage.

  The present invention has been made to solve the above problems, and the problem to be solved by the present invention is to reduce a collision load applied to an engine auxiliary machine or the like from a position higher than a bumper reinforcement or the like at the time of a vehicle front collision. This is to prevent damage to the engine auxiliary equipment.

The above-described problems are solved by the inventions of the claims.
According to the first aspect of the present invention, a tray on which an engine accessory is placed in an engine room of a vehicle, and the tray is supported at a position higher than the front side member constituting the skeleton of the vehicle, and attached to the front side member. A front structure of a vehicle including a tray gantry, wherein a protrusion-like member protruding upward with respect to the front side member is fixed to the front side member behind the tray gantry. In this case, when a collision load is applied to the tray mount at the time of a frontal collision of the vehicle, the shock absorber absorbs the collision load by moving backward with the tray mount and deforming in contact with the protruding member. A member is provided.

When a collision load is applied to the engine accessory from a position higher than the front side member during a vehicle front collision, the collision load is applied to the tray mount via the engine accessory and the tray.
According to the present invention, when the tray base is retracted by receiving a collision load, the shock absorbing member of the tray base is retracted together with the tray base and comes into contact with the protruding member of the front side member. As the tray mount is retracted, the impact absorbing member is deformed. As a result, the collision load is absorbed by the impact absorbing member, and the collision load applied to the engine accessory is reduced. As a result, the engine accessory is unlikely to be damaged.

According to the invention of claim 2, the front end of the tray or the front end of the engine accessory protrudes forward by a certain dimension from the front end of the tray mount and receives a collision load before the tray mount. The tray is configured to be retractable with respect to the gantry, and the tray is configured to be retracted by a certain size with respect to the tray gantry so that the connection between the tray and the tray gantry is released. To do.
For this reason, a collision load is first applied to the tray or the engine accessory, and after the connection between the tray and the tray frame is released, the collision load is applied only to the tray frame. That is, a collision load is applied to the engine auxiliary machine only until the connection with the tray mount is released, and thereafter, the collision load is not applied, so that the engine auxiliary machine is not easily damaged.

According to a third aspect of the present invention, the tray base is provided with a guide that guides the movement of the tray and the engine accessory that are disconnected from the tray base.
For this reason, by guiding the engine auxiliary machine or the like in the desired direction by the guide portion, it is possible to prevent damage to the engine auxiliary machine and to prevent damage to other parts.
According to the invention of claim 4, the lower surface of the tray and the upper surface of the tray mount are not in contact with each other except for the connection portion.
For this reason, vibration or the like is hardly transmitted between the tray and the tray mount.

  According to the present invention, even when a collision load is applied to the engine auxiliary machine from a position higher than the front side member at the time of a vehicle front collision, the collision load is absorbed to some extent, so that the engine auxiliary machine is not easily damaged.

It is a schematic plan view of a vehicle front part provided with the front part structure which concerns on Embodiment 1 of this invention. It is a schematic longitudinal cross-sectional view (II-II arrow sectional drawing of FIG. 1) of a vehicle front part provided with the front part structure which concerns on this embodiment. It is a longitudinal cross-sectional view (III arrow enlarged view of FIG. 2) showing the front part structure of the vehicle which concerns on this embodiment. It is a perspective view showing the front part structure of the vehicle concerning this embodiment. It is a disassembled perspective view showing the front part structure of the vehicle which concerns on this embodiment. It is the perspective view (A figure) showing the connection structure of the tray which comprises the front part structure of the vehicle which concerns on this embodiment, and a tray mount frame, and an expanded vertical sectional view (B figure). It is a partially broken perspective view showing the impact absorbing member of the tray mount. It is a schematic plan view (A figure) of a vehicle provided with the conventional front part structure, and a perspective view (B figure) showing the front part structure of a vehicle.

[Embodiment 1]
Hereinafter, the vehicle front structure according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 7. The front structure of the vehicle according to the present embodiment is configured to absorb the collision load even when a collision load is applied to the engine auxiliary machine from a position higher than that of the front side member at the time of a frontal collision of the automobile. This is a configuration for suppressing damage to the machine and its peripheral devices.
In addition, front and rear, right and left and up and down in the figure correspond to front and rear, left and right and up and down of the automobile.

<About the front of the car>
First, an outline of the front part of the automobile will be described with reference to FIGS.
An engine room 5 divided by a vehicle compartment 2 and a dash panel 3 (see FIG. 2) is provided at the front portion of the body 1 of the automobile M, and a pair extending in the vehicle front-rear direction on the left and right sides of the engine room 5. The front side member 10 is provided.
The front side member 10 is a member constituting the skeleton of the automobile M, and extends substantially horizontally in the vehicle front-rear direction in the engine room 5 as shown in FIG. The front side member 10 is inclined so that the rear side is lowered along the dash panel 3 at the rear end position of the engine room 5. A rear end portion (not shown) of the front side member 10 is connected to a floor under reinforcement (not shown) extending in the vehicle front-rear direction in the lower floor portion of the passenger compartment 2.
As shown in FIG. 2, brackets 12 projecting downward are provided at the front portions of the left and right front side members 10, and a front cross member 14 is passed between the brackets 12. Further, bumper reinforcements 16 y of the front bumper 16 are attached to the front end portions of the left and right front side members 10.

As shown in FIGS. 2 and 3 and the like, the fixing flange 21 of the engine mount 20 is fixed to the upper surfaces of the left and right front side members 10 by bolts or the like, and the engine assembly 24 (see FIG. 1) is attached to the engine mount 20. The transaxle 25 is supported by suspension. As shown in FIG. 3 and the like, the engine mount 20 includes an engine mount main body 22 having a substantially trapezoidal side surface, and an inclined support portion 23 configured to be rearward and higher at the rear side of the engine mount main body 22. It is composed of The substantially upper half of the engine mount body 22 and the inclined support portion 23 protrude upward with respect to the upper surface of the front side member 10.
In the engine room 5, a canister 27 for adsorbing fuel vapor is disposed on the rear side of the engine mount 20 as shown in FIG.
Further, in the engine room 5, as shown in FIGS. 1, 2, etc., an inverter tray 30 on which an inverter 29 is placed on the front side of the engine mount 20, and a tray mount for supporting the inverter tray 30 40 is provided.

<About the tray mount 40>
As shown in FIGS. 4 and 5, the tray base 40 is a base that supports the inverter tray 30 while being fixed to the left front side member 10, and includes a shelf-like bracket portion 41 and a base body portion 43. And a guide portion 45 extending horizontally rearward from the gantry main body portion 43. The bracket portion 41 is a shelf-like member that supports the gantry body portion 43 from below, and the base end portion of the bracket portion 41 is fixed to the upper surface and the inner vertical surface (right side surface) of the front side member 10 by welding or the like. Yes.
The gantry main body 43 is a gantry having a substantially trapezoidal side surface. As shown in FIG. 7 and the like, the front plate 431 constituting the front side, and the central plate 432 constituting the ceiling surface and the left side. And a rear plate portion 433 constituting the rear surface side. The front plate portion 431 and the rear plate portion 433 are bent into a substantially Z-shaped side surface, and flange portions 431f and 433f are formed at the lower end position and the upper end position, respectively. Then, the flange portions 431f and 433f at the lower end positions of the front plate portion 431 and the rear plate portion 433 are fixed to the bracket portion 41 with bolts or the like while being placed on the bracket portion 41 as shown in FIG. Has been. Moreover, as shown in FIG. 7, the ceiling surface of the center board part 432 is covered with the flange parts 431f and 433f of the upper end position of the front board part 431 and the rear board part 433, and is fixed by welding or the like. Further, the side opening between the front plate portion 431 and the rear plate portion 433 is blocked by the left side surface of the central plate portion 432. And the flange part 432f formed in the lower end position of the left side surface of the center board part 432 is being fixed to the upper surface of the front side member 10 with the volt | bolt etc. as shown in FIG.

  As shown in FIG. 5 and the like, a pair of left and right front connection flanges 51 connected to the inverter tray 30 are fixed to the upper surface of the gantry main body 43, that is, the ceiling surface of the central plate 432. The front connecting flange 51 is bent and formed in a substantially U-shaped cross section, and a groove portion 51m extending in the front-rear direction is formed at the center position. Smooth tray support portions 51f are provided on the left and right sides of the groove portion 51m. And the groove part 51m of the front part connection flange 51 is being fixed to the upper surface of the mount main body part 43 with the volt | bolt B1. Further, the tray support portion 51f of the front connection flange 51 is fixed to the front back plate 34 (see FIGS. 6A and 6B) of the inverter tray 30 described later by a bolt B2.

As shown in FIG. 5, the guide portion 45 of the tray base 40 has a horizontal overhanging portion 45h that protrudes horizontally rearward from the position of the ceiling surface of the base body portion 43, and a rear upper position at the rear end position of the horizontal overhanging portion 45h. It is comprised from the inclination part 45x inclined in the shape of a slide so that it might become high. Then, the horizontal overhanging portion 45h and the inclined portion 45x of the guide portion 45 are formed in a substantially gate-like cross section, and as shown in FIGS. 3 to 5 and the like, the top of the engine mount 20 fixed to the left front side member 10 is fixed. It is put on. And the inclination part 45x of the guide part 45 is orient | assigned upwards rather than the canister 27 arrange | positioned at the rear side of the engine mount 20, as shown in FIG.
Further, as shown in FIG. 5 and the like, a rear connection flange 53 connected to the inverter tray 30 is fixed to the rear portion of the horizontal overhang portion 45 h of the guide portion 45. The rear connection flange 53 is a flat plate bent into a substantially gate-shaped cross section, and as shown in FIGS. 5 and 6A, front and rear leg portions 53f are fixed to the guide portion 45 by bolts B3. And the flat plate part 53s of the center of the rear part connection flange 53 is fixed to the rear side support part 36 (refer FIG. 6 (A)) of the inverter tray 30 mentioned later with the volt | bolt B4.
Further, the inclined portion 45x of the guide portion 45 is supported from below by a bracket 23b fixed to the inclined support portion 23 of the engine mount 20, as shown in FIGS.

<About the bulk 50 of the tray mount 40>
As shown in FIGS. 2 and 3, the tray base 40 is provided with a bulk 50 that is a cylindrical shock absorbing member from the base body 43 to the front of the horizontal overhang 45 h of the guide 45. . The bulk 50 is a member for absorbing a collision load applied to the tray mount 40. When the tray mount 40 is retracted in response to the collision load, the bulk 50 is retracted together with the tray mount 40 and brought into contact with the engine mount 20. Has been placed. That is, the bulk 50 is disposed in front of the engine mount 20 at a height position substantially equal to that of the engine mount 20, and includes a front bulk 52 and a rear bulk 54 disposed coaxially (front and rear). . And the front | former stage bulk 52 is provided so that it may extend in the front-back direction in the approximate center position of the gantry main-body part 43. FIG. Further, the rear bulk 54 is provided so as to extend in the front-rear direction at a substantially center position of the horizontal overhanging portion 45 h of the guide portion 45.

<About the inverter tray 30>
The inverter tray 30 is a tray on which the inverter 29 is placed, and is supported by the tray mount 40 described above. As shown in FIG. 4, the inverter tray 30 includes a tray main body 31 on which the inverter 29 is placed, and a front back plate 34 for connecting the tray main body 31 to the tray mount 40 (FIGS. 3 and 6A). And a rear support portion 36 (see FIGS. 3 and 6A).
The front back plate 34 of the inverter tray 30 is a steel plate that covers the front back side of the tray main body 31, and is formed on the left and right front connection flanges 51 of the tray mount 40, as shown in FIGS. A recess 34e configured to protrude downward with respect to the tray main body 31 is provided at a corresponding position. The lower surface of the recess 34e of the front back plate 34 is configured to come into surface contact with the tray support portion 51f of the front connection flange 51 of the tray mount 40. Further, as shown in FIG. 6 (A), the front back plate 34 of the inverter tray 30 is front and rear at a position corresponding to the bolt B1 of the left and right front connection flanges 51 from the recess 34e to the front side of the recess 34e. A long elongated hole 34n is formed.
6A and 6B, the front back plate 34 of the inverter tray 30 is positioned at the position of the bolt B2 in the left and right front connection flanges 51 from the recess 34e to the front side of the recess 34e. A bolt hole 34h through which each bolt B2 is passed is formed. As shown in FIG. 6 (B), the bolt hole 34h has a hole main body portion 341 that is fixed to the bolt B2, and a slant that is positioned on the front side of the hole main body portion so that the bolt B2 can be pulled out forward. A notch hole 340 is formed. For this reason, in a state where the front back plate 34 of the inverter tray 30 and the front connection flange 51 of the tray mount 40 are connected by the bolt B2, for example, the front back plate 34 of the inverter tray 30 is placed in the tray by a collision load. When retracted relative to the gantry 40, the bolt B <b> 2 protrudes forward from the oblique notch 340 of the bolt hole 34 h to connect the front back plate 34 of the inverter tray 30 and the front coupling flange 51 of the tray gantry 40. Will be released.

The rear support portion 36 of the inverter tray 30 is a bracket connected to the central rear portion of the tray main body portion 31 and protrudes downward with respect to the tray main body portion 31 as shown in FIG. And a pair of left and right recesses 36e. The lower surface of the recess 36e of the rear support portion 36 of the inverter tray 30 is configured to be in surface contact with the flat plate portion 53s of the rear connection flange 53 of the tray mount 40. The left and right recesses 36e of the rear support portion 36 are formed with notch-shaped bolt holes 36h opened on the front side, and the notch-shaped bolt holes 36h of the rear connection flange 53 of the tray mount 40 are provided. Each bolt B4 is passed through.
Therefore, in a state where the rear support portion 36 of the inverter tray 30 and the rear connection flange 53 of the tray mount 40 are connected by the bolt B4, for example, the rear support portion 36 of the inverter tray 30 is caused by a collision load. When retracted relative to the tray mount 40, the bolt B4 protrudes forward from the notched bolt hole 36h, and the connection between the rear support portion 36 of the inverter tray 30 and the rear connection flange 53 of the tray mount 40 is established. Canceled.
The front back plate 34 and the rear support portion 36 of the inverter tray 30 are bolted to the front connection flange 51 and the rear connection flange 53 of the tray mount 40, respectively, and the front end position of the inverter tray 30 is As shown in FIG. 3 and the like, the arrangement of the inverter tray 30 with respect to the tray main body 31 is set so as to protrude forward from the front end position of the tray mount 40 by a certain dimension.

<Operation of vehicle front structure>
Next, the operation of the front structure of the vehicle at the time of a frontal collision will be described.
For example, when a collision load is applied to the inverter 29 and the inverter tray 30 from a position higher than the bumper reinforcement 16y and the front side member 10 at the time of a vehicle front collision, the inverter tray 30 and the like move backward with respect to the tray mount 40. That is, the front back plate 34 and the rear support portion 36 of the inverter tray 30 retreat with respect to the front connection flange 51 and the rear connection flange 53 of the tray mount 40 due to a collision load, respectively. As a result, the bolt B2 of the tray base 40 is removed from the bolt hole 34h of the front back plate 34 of the inverter tray 30, and the bolt B4 of the tray base 40 is removed from the notch bolt hole 36h of the rear support portion 36 of the inverter tray 30. It comes off. As a result, the inverter 29 and the inverter tray 30 are detached from the tray mount 40 and slide backward on the tray mount 40, and as shown by a two-dot chain line in FIG. Led. As a result, the inverter 29 and the inverter tray 30 do not collide with the canister 27 located on the rear side of the engine mount 20.

Further, after the connection between the inverter 29 and the inverter tray 30 and the tray mount 40 is released, when a collision load is applied to the tray mount 40, the rear end of the bulk 50 (the rear bulk 54) in the process of moving the tray mount 40 backward. The rear end) contacts the engine mount 20. Then, in the process of moving (deforming) the tray mount 40 backward due to the collision load, the front bulk 52 and the rear bulk 54 are crushed in the axial direction, and the collision load is absorbed. For this reason, after the connection between the inverter 29 and the inverter tray 30 and the tray mount 40 is released, the collision load is not applied to the inverter 29 and the inverter tray 30.
Thus, since a collision load is applied to the inverter 29 at the initial stage of the collision and no collision load is applied thereafter, the inverter 29 is difficult to be damaged, and leakage etc. can be prevented. Further, since the inverter 29 does not collide with the canister 27, the canister 27 can be prevented from being damaged.
That is, the inverter 29 corresponds to the engine accessory of the present invention, and the inverter tray 30 corresponds to the tray of the present invention. The bulk 50 corresponds to the shock absorbing member of the present invention, and the engine mount 20 corresponds to the protruding member of the front side member of the present invention.

<Advantages of the vehicle front structure according to this embodiment>
According to the vehicle front structure according to the present embodiment, when a collision load is applied to the inverter 29 (engine auxiliary machine) from a position higher than the front side member 10 at the time of a vehicle front collision, the collision load is applied to the inverter 29 (engine auxiliary machine). ), And is added to the tray mount 40 via the inverter tray 30 (tray).
According to the present invention, when the tray mount 40 is retracted due to a collision load, the bulk 50 (impact absorbing member) of the tray mount 40 contacts the engine mount 20 (protruding member) of the front side member 10. Then, the bulk 50 is deformed as the tray mount 40 is retracted. Thereby, the collision load is absorbed by the bulk 50, and the collision load applied to the inverter 29 is reduced. As a result, the inverter 29 is hardly damaged.

Further, the front end of the inverter tray 30 protrudes forward by a certain dimension from the front end of the tray mount 40 and is configured to be retractable relative to the tray mount 40 by receiving a collision load before the tray mount 40. It is. Then, when the inverter tray 30 moves backward by a certain dimension with respect to the tray mount 40, the connection between the inverter tray 30 and the tray mount 40 is released. For this reason, after the connection between the inverter tray 30 and the tray mount 40 is released, a collision load is applied only to the tray mount 40. That is, a collision load is applied to the inverter 29 only until the connection with the tray mount 40 is released, and thereafter, the collision load is not applied, so that the inverter 29 is hardly damaged.
In addition, the tray mount 40 is provided with a guide portion 45 that guides the movement of the inverter tray 30 and the like that are disconnected from the tray mount 40. Therefore, by guiding the inverter tray 30 and the like in the desired direction by the guide portion 45, the inverter 29 can be prevented from being damaged and other components can also be prevented from being damaged.
In addition, since the lower surface of the inverter tray 30 and the upper surface of the tray base 40 are not in contact with each other except for the connection portion, vibration and the like are hardly transmitted between the inverter tray 30 and the tray base 40.

<Example of vehicle body front structure change>
In addition, this invention is not limited to the said embodiment, The change in the range which does not deviate from the summary of this invention is possible. For example, in the present embodiment, an example in which the bulk 50 is received by the engine mount 20 when the tray mount 40 is retracted due to a collision load is shown. However, a configuration in which a stepped protrusion is formed on the upper surface of the front side member 10 instead of the engine mount 20 and the bulk 50 is received by the protrusion is also possible.
Further, in this embodiment, an example in which the bulk 50 is formed in a cylindrical shape is shown, but a configuration in which the tray mount 40 is partitioned into a honeycomb structure by a flat plate extending in the front-rear direction instead of the cylindrical bulk 50 is also possible. .
Moreover, although the example which forms the guide part 45 of the tray mount 40 in slide shape was shown, the structure which forms the said guide part 45 in a bowl shape and guides the said inverter tray 30 to a horizontal direction is also possible.
Moreover, although the inverter 29 was illustrated as an engine auxiliary machine, it is also possible to apply this invention to engine auxiliary machines other than the inverter 29. FIG.

5 Engine room 10 Front side member 20 Engine mount (protruding member)
29 Inverter (engine accessory)
30 Inverter tray (tray)
40 Tray mount 45 Guide part 50 Bulk (Shock absorbing member)
52 Front Bulk 54 Back Bulk

Claims (4)

A vehicle comprising: a tray on which an engine accessory is placed in an engine room of the vehicle; and a tray base that supports the tray at a position higher than a front side member constituting the skeleton of the vehicle and is attached to the front side member. A front structure,
A protrusion-like member protruding upward with respect to the front side member is fixed to the front side member behind the tray mount,
When a collision load at the time of a vehicle front collision is applied to the tray mount, the tray mount is retracted together with the tray mount and abuts against the projecting member to absorb the collision load. A vehicle front structure characterized in that a shock absorbing member is provided. A vehicle front structure according to claim 1,
The front end of the tray or the front end of the engine accessory protrudes forward by a certain dimension from the front end of the tray mount, and retracts with respect to the tray mount by receiving a collision load before the tray mount. Possible configuration,
A front structure of a vehicle, wherein the tray is retracted by a certain dimension with respect to the tray mount, so that the connection between the tray and the tray mount is released. A vehicle front structure according to claim 2,
A front structure of a vehicle, wherein the tray base is provided with a guide portion that guides the movement of the tray and the engine accessory that are disconnected from the tray base. A vehicle front structure according to any one of claims 1 to 3,
The front structure of a vehicle, wherein the lower surface of the tray and the upper surface of the tray mount are not in contact with each other except for a connection portion.

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