JP2017210029A - Front part structure of vehicle - Google Patents

Abstract

An object of the present invention is to suppress deformation of a front portion of a passenger compartment. The present invention is configured such that left and right front wheels 37 can be supported from the inside in the vehicle width direction, respectively, at the left and right side members 14 extending in the vehicle front-rear direction, and at the left and right end positions of the floor portion of the passenger compartment 40. A rocker rail 43 that extends in the vehicle front-rear direction and is disposed behind the left and right front wheels 37, and is provided so as to extend in the vehicle width direction at the tip positions of the left and right side members 14, and the left and right end portions 22w are left and right front wheels 37. A front bumper reinforce 22 disposed in front of the front wheel 37, and the front end of the front end 37 of the front wheel 37 has a front end surface 37r whose front end 22w is moved rearward at the time of a minute lap collision. The front wheel 37 is configured to be inclined inward in the vehicle width direction with respect to the traveling direction. [Selection] Figure 4

Description

  The present invention is arranged at left and right side members that support left and right front wheels from the inside in the vehicle width direction, left and right rocker rails that extend in the vehicle front-rear direction at the left and right end positions of the passenger compartment floor, and the tip positions of the left and right side members. The present invention relates to a front structure of a vehicle including a front bumper reinforcement.

  A technique related to the front structure of a vehicle is described in Patent Document 1. As shown in FIG. 8, the front structure of a vehicle described in Patent Document 1 includes left and right side members 102 that support left and right front wheels 100 from the inner side in the vehicle width direction through suspension members (not shown) and lower arms 101. I have. Reinforces 104 of the front bumper are provided at the tip positions of the left and right side members 102 through the crash box 103 so as to extend in the vehicle width direction. Further, a connecting member 105 is obliquely passed between the front end position of the side member 102 and the end 104t of the reinforcement 104. Further, left and right rocker rails 107 extending in the vehicle front-rear direction are provided at the left and right end positions of the floor portion of the passenger compartment R. The rocker rail 107 is disposed further inside than the inner end in the width direction of the front wheel 100 in the vehicle width direction.

  In recent years, a micro lap collision test has been performed to reproduce the situation of a frontal collision when a vehicle collides with an obstacle (collision G) such as a standing tree or a utility pole. In the minute lap collision test, as shown in FIGS. 8 and 9, when the collision object G collides with the end 104 t of the reinforcement 104, the crash box 103 is crushed, and the connecting member 105 is bent so as to fall outward in the vehicle width direction. . Thereby, the edge part 104t of the reinforcement 104 is displaced to the vehicle width direction outer side.

  Then, when the minute lap collision proceeds and the side member 102 starts buckling deformation as shown in FIG. 10, the end 104 t of the reinforcement 104 contacts the front outer peripheral surface of the front wheel 100. When the front wheel 100 is pressed backward by the end 104t of the reinforcement 104 and the collision object G, the front wheel 100 is inclined outward in the vehicle width direction with respect to the traveling direction, as indicated by a two-dot chain line in FIG. In this state, when the front wheel 100 moves backward, the inner end 100x in the width direction of the rear outer peripheral surface of the front wheel 100 comes into contact with the front end of the rocker rail 107. For this reason, it becomes difficult for the rear portion of the front wheel 100 to enter the inside of the rocker rail 107 in the vehicle width direction.

JP 2012-166744 A

  However, as shown in FIG. 11, in a vehicle in which the rocker rail 107 is provided at substantially the same position in the vehicle width direction as the front wheel 100, when the front wheel 100 moves backward in a state of being inclined outward with respect to the traveling direction, the front wheel 100 The rear portion may enter the inside in the vehicle width direction with respect to the rocker rail 107. In this case, since the rear part of the front wheel 100 presses the floor part of the passenger compartment R inside the rocker rail 107, the deformation of the floor part becomes large.

  The present invention has been made to solve the above-described problems, and the problem to be solved by the present invention is to prevent the front wheels from entering the inside of the rocker rail in the vehicle width direction at the time of a minute lap collision. It is to suppress the deformation of the front part.

  The above-described problems are solved by the inventions of the claims. The invention according to claim 1 is configured to be able to support the left and right front wheels from the inner side in the vehicle width direction, and to the vehicle front-rear direction at the left and right side members extending in the vehicle front-rear direction and the left and right end positions of the passenger compartment floor. The rocker rail that extends and is disposed behind the left and right front wheels, and is provided to extend in the vehicle width direction at the tip positions of the left and right side members, and the left and right end portions are disposed in front of the left and right front wheels. The front structure of the vehicle is provided with a front bumper reinforce, and the tip of the end of the reinforce moved rearward at the time of a minute lap collision abuts the front outer peripheral surface of the front wheel, and the front wheel is moved in the traveling direction. It is configured to be inclined inward in the vehicle width direction. Here, the micro lap collision refers to a state in which the vehicle collides with an obstacle (collision) such as a standing tree or a utility pole from the front end of the vehicle, for example.

  According to the present invention, at the time of a minute lap collision, the tip of the end portion of the reinforcement that has moved rearward comes into contact with the front outer peripheral surface of the front wheel, and the front wheel is inclined inward in the vehicle width direction with respect to the traveling direction. That is, when the front wheel is inclined inward in the vehicle width direction with respect to the traveling direction, the rear portion of the front wheel moves outward in the vehicle width direction. Then, when the front wheel moves backward due to the collision, the outer peripheral surface of the rear portion of the front wheel that has moved outward in the vehicle width direction comes into contact with the front portion of the rocker rail. Further, when the micro lap collision proceeds and the collision object contacts the front outer peripheral surface of the front wheel, the collision object presses the outer side in the width direction of the front outer peripheral surface of the front wheel inclined inward. As a result, the front wheel rotates horizontally around the contact portion with the rocker rail so as to be inclined outward in the vehicle width direction with respect to the traveling direction. As a result, the front wheel is pushed out of the wheel house. For this reason, unlike the conventional case, the rear portion of the front wheel does not enter and is pushed inward in the vehicle width direction of the rocker rail, and deformation of the front portion of the passenger compartment can be suppressed.

  According to the invention of claim 2, the tip of the end portion of the reinforcement is configured to abut on the outer peripheral surface of the front portion of the front wheel located on the inner side in the vehicle width direction from the center of gravity of the front wheel. For this reason, the front end of the end portion of the reinforcement comes into contact with the outer peripheral surface of the front portion of the front wheel, so that the front wheel is easily inclined inward in the vehicle width direction with respect to the traveling direction.

  According to the invention of claim 3, the crash box is provided between the left and right side members and the reinforcement of the front bumper, and at the time of a minute lap collision, the end portion of the reinforcement is positioned before the crash box is crushed. It is configured to bend inward in the width direction.

  According to the invention of claim 4, the front wheel is supported by the side member via the suspension member and the lower arm, and is located at the same position as the joint portion connecting the front wheel and the lower arm, or the vehicle width than the joint portion. The front end of the front portion of the front wheel located on the inner side in the direction is configured such that the tip of the end portion of the reinforcement comes into contact. For this reason, when the tip of the end portion of the reinforcement comes into contact with the outer peripheral surface of the front portion of the front wheel, the front wheel is more easily inclined inward in the vehicle width direction with respect to the traveling direction.

  According to invention of Claim 5, the center part in the width direction of a front wheel is arrange | positioned in the position on the front extension line of a rocker rail.

  According to the present invention, the rear portion of the front wheel is prevented from entering the inside of the rocker rail in the vehicle width direction at the time of the minute lap collision, and deformation of the front portion of the passenger compartment can be suppressed.

It is a top view showing the front part structure of the vehicle which concerns on Embodiment 1 of this invention. It is a perspective view showing the relationship between a left front wheel and a lower arm. It is a top view showing a motion of the left front wheel at the time of a minute lap collision. It is a top view showing a motion of the left front wheel at the time of a minute lap collision. It is a top view showing a motion of the left front wheel at the time of a minute lap collision. It is a top view showing a motion of the left front wheel at the time of a minute lap collision. It is a top view showing a motion of the left front wheel at the time of a minute lap collision. It is a top view showing the front part structure of the conventional vehicle. It is a top view at the time of the micro lap collision in the front part structure of the conventional vehicle. It is a top view at the time of the micro lap collision in the front part structure of the conventional vehicle. It is a top view at the time of the micro lap collision in the front part structure of the conventional vehicle.

[Embodiment 1]
Hereinafter, a front structure of a vehicle such as a passenger car according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 7. Here, the front, rear, left and right in the figure correspond to the front, rear, left and right of the passenger car (vehicle).

<About the front structure of the vehicle 10>
As shown in FIG. 1, the vehicle 10 is provided with a pair of side members 14 that extend in the vehicle front-rear direction on both the left and right sides of the engine room 12. Crash boxes 16 are attached substantially coaxially to the front ends of the left and right side members 14, respectively. The crash box 16 is configured to absorb a collision load by being crushed between the reinforcement 22 of the front bumper and the side member 14 when the vehicle 10 collides forward. The rear surface of the reinforcement 22 of the front bumper (not shown) is connected to the left and right crash boxes 16 at a position 22x (connecting portion 22x) closer to the left and right ends.

<Suspension member 30 etc.>
As shown in FIG. 1, a suspension member 30 is suspended and supported by left and right side members 14 at the rear portion of the engine room 12 of the vehicle 10. The suspension member 30 is configured to support the engine and the transmission (not shown) and to support the left and right front wheels 37 via the left and right lower arms 33. As shown in FIGS. 1 and 2, the left and right lower arms 33 are connected to the left and right end positions of the suspension member 30 in a state in which the left and right lower arms 33 can be vertically rotated by two connecting mechanisms 33c. A spindle member 35 that rotatably supports the front wheel 37 is connected by a ball joint 34 to a distal end portion 33f of a portion of the lower arm 33 that protrudes outward in the vehicle width direction. That is, the ball joint 34 corresponds to the joint portion in the present invention.

<About vehicle compartment 40>
As shown in FIG. 1, a dash panel 41 that is a vertical wall that partitions the engine room 12 and the vehicle compartment 40 is formed on the rear side of the suspension member 30 so as to extend in the vehicle width direction. In addition, rocker rails 43 extending in the vehicle front-rear direction are provided on the left and right sides of the floor portion of the passenger compartment 40. The rocker rail 43 is disposed at substantially the same position as the front wheel 37 in the vehicle width direction, that is, the central portion C in the width direction of the front wheel 37 is located at a position on the extension line of the rocker rail. Here, the central portion C of the front wheel 37 is disposed on the inner side in the vehicle width direction than the virtual center of gravity line J passing over the center of gravity of the front wheel 37. Further, the ball joint 34 that connects the lower arm 33 and the spindle member 35 is disposed further inward in the vehicle width direction than the center portion C of the front wheel 37.

<About front bumper reinforcement 22>
The front bumper reinforce 22 is made of, for example, an aluminum alloy and is formed in a rectangular tube shape. As shown in FIG. 1, the center portion in the vehicle width direction is curved so as to protrude forward with respect to both end portions. ing. That is, the left and right end portions 22w of the reinforcement 22 are gently inclined backward so as to be positioned on the rear side as approaching the end surface. As described above, the connecting portion 22x formed near the left and right ends of the rear surface of the reinforcement 22 is connected to the front ends of the left and right crash boxes 16.

  As shown in FIGS. 1 and 3, the front surface of the reinforcement 22 of the front bumper is an outer position in the vehicle width direction of the left connecting portion 22 x, and a predetermined dimension position from the left end surface of the reinforcement 22 is a collision object at the time of a minute lap collision. It is a collision receiving portion 22u where G collides. For this reason, at the time of a minute lap collision, a bending moment is applied to the left connection portion 22x of the reinforcement 22 and the left end portion 22w of the reinforcement 22 is bent inward in the vehicle width direction around the left connection portion 22x. Further, at the time of a minute lap collision, the crash box 16 is crushed, so that the left end portion 22w of the reinforcement 22 moves backward, and the tip of the left end portion 22w of the reinforcement 22 is brought to the front outer peripheral surface 37r of the front wheel 37 as shown in FIG. Come into contact. Here, the position where the tip of the left end portion 22 w of the reinforcement 22 contacts the front outer peripheral surface 37 r of the front wheel 37 is set to be substantially the same position as the ball joint 34 in the width direction of the front wheel 37.

<About the function of the front structure of the vehicle 10>
Next, the function of the front structure of the vehicle 10 at the time of a minute lap collision will be described. In the first stage of the micro lap collision, the collision object G abuts on the collision receiving portion 22u of the reinforcement 22 as shown by the two-dot chain line in FIGS. As a result, a bending moment is applied to the left connection portion 22x of the reinforcement 22 and the left end 22w of the reinforcement 22 is bent inward in the vehicle width direction around the left connection portion 22x. In the second stage of the micro lap collision, as shown by the solid line in FIG. 3, the crash box 16 is crushed so that the left end 22 w of the reinforce 22 retreats, and as shown in FIG. 3, the left end 22 w of the reinforce 22 The front end abuts against the front outer peripheral surface 37r of the front wheel 37 (substantially the same position as the ball joint 34 in the width direction).

  Then, the collision object G presses the left end portion 22w of the reinforcement 22 rearward so that the left end portion 22w of the reinforcement 22 is bent inward in the vehicle width direction, and the left end portion 22w of the reinforcement 22 is shown in FIG. The front end of the front wheel presses the front outer peripheral surface of the front wheel 37 rearward in the vehicle width direction. As a result, the front wheel 37 moves backward in a state where it is inclined inward in the vehicle width direction with respect to the traveling direction. That is, when the front wheel 37 is inclined inward in the vehicle width direction with respect to the traveling direction, the rear portion of the front wheel 37 moves outward in the vehicle width direction. Then, as the front wheel 37 moves backward, the rear outer peripheral surface 37 r of the front wheel 37 comes into contact with the front part of the rocker rail 43.

  In the third stage of the minute lap collision, the collision object G further moves rearward, and as shown in FIG. 5, the collision object G contacts the front outer peripheral surface 37r of the front wheel 37 inclined inward in the vehicle width direction. Thereby, the collision object G presses the width direction outer side of the front outer peripheral surface 37r of the front wheel 37. As a result, as shown in FIGS. 6 and 7, the front wheel 37 is pressed by the collision object G and has a contact portion T with the rocker rail 43 so as to be inclined outward in the vehicle width direction with respect to the traveling direction. It rotates horizontally around the center. Accordingly, a pulling force is generated in the left-right direction with respect to the ball joint 34 connecting the front wheel 37 and the lower arm, and the ball joint 34 is broken. The front wheel 37 is pushed out of the wheel house H. Thereby, deformation of the front portion of the passenger compartment 40 can be suppressed.

<Advantages of the front structure of the vehicle 10>
According to the front structure of the vehicle 10 according to the present embodiment, the tip of the end 22w of the front bumper (reinforce 22) that has moved rearward abuts against the front outer peripheral surface 37r of the front wheel 37 during a minute lap collision, 37 is inclined inward in the vehicle width direction with respect to the traveling direction. That is, since the front wheel 37 is inclined inward in the vehicle width direction with respect to the traveling direction, the rear portion of the front wheel 37 moves outward in the vehicle width direction. Then, when the front wheel 37 moves backward due to the collision, the rear outer peripheral surface 37 r of the front wheel 37 moved to the outer side in the vehicle width direction comes into contact with the front portion 43 f of the rocker rail 43. Further, when the micro lap collision proceeds and the collision object G comes into contact with the front outer circumferential surface 37r of the front wheel 37, the width of the front outer circumferential surface 37r of the front wheel 37 in which the collision object G is inclined inward in the vehicle width direction. Press outward in the direction. As a result, the front wheel 37 rotates horizontally around the contact portion with the rocker rail 43 so as to be inclined outward in the vehicle width direction with respect to the traveling direction. As a result, the front wheel 37 is pushed out of the wheel house H. For this reason, unlike the conventional case, the rear portion of the front wheel 37 does not enter the vehicle width direction inside of the rocker rail 43 and is pushed in, and deformation of the front portion of the passenger compartment 40 can be suppressed.

  Further, the tip of the end portion 22w of the reinforcement 22 comes into contact with the front outer peripheral surface 37r of the front wheel 37 substantially in the same position in the vehicle width direction as the ball joint 34 (joint portion) connecting the front wheel 37 and the lower arm 33. It is configured. For this reason, the front end of the end portion 22w of the reinforcement 22 comes into contact with the front outer peripheral surface 37r of the front wheel 37, so that the front wheel 37 is easily inclined inward in the vehicle width direction with respect to the traveling direction.

<Example of change>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, in the present embodiment, the position where the tip of the left end portion 22 w of the reinforcement 22 contacts the front outer peripheral surface 37 r of the front wheel 37 is set to be substantially the same position as the ball joint 34 in the width direction of the front wheel 37. However, it is preferable that the front end of the left end 22w of the reinforcement 22 is brought into contact with the front outer peripheral surface 37r of the front wheel 37 located on the inner side in the vehicle width direction with respect to the ball joint 34. Thereby, the front wheel 37 can be efficiently inclined to the inner side in the vehicle width direction with respect to the traveling direction.

10 .... Vehicle 14 ... Side member 16 ... Crash box 22 ... Reinforce 22w ... End 22x ... Connection part 30 ... Suspension member 33 ... Lower arm 34 ... Ball joint (joint part)
37 ··· front wheel 37r · · · outer peripheral surface 40 · · · vehicle compartment 43 · · · rocker rail

Claims (5)

The left and right front wheels can be supported from the inside in the vehicle width direction. The left and right side members extend in the vehicle front-rear direction, and extend in the vehicle front-rear direction at the left and right end positions of the passenger compartment floor. Rocker rails arranged at the rear, and front bumper reinforcements provided so as to extend in the vehicle width direction at the tip positions of the left and right side members, with the left and right end portions arranged in front of the left and right front wheels A vehicle front structure,
At the time of a minute lap collision, the tip of the end portion of the reinforcement that has moved rearward is in contact with the outer peripheral surface of the front portion of the front wheel, and the front wheel is configured to be inclined inward in the vehicle width direction with respect to the traveling direction. Vehicle front structure. A vehicle front structure according to claim 1,
The front structure of the vehicle is configured such that a front end of the end portion of the reinforcement is in contact with a front outer peripheral surface of the front wheel located on the inner side in the vehicle width direction with respect to the center of gravity of the front wheel. A vehicle front structure according to claim 1 or 2, wherein
Between the left and right side members and the front bumper reinforcement, a crash box is provided,
A front structure of a vehicle configured such that, at the time of the minute lap collision, an end portion of the reinforcement is bent inward in the vehicle width direction before the crash box is crushed. A vehicle front structure according to any one of claims 1 to 3,
The front wheel is supported by the side member via a suspension member and a lower arm,
The front end of the reinforce is in contact with the front outer peripheral surface of the front wheel located at the same position as the joint portion connecting the front wheel and the lower arm or on the inner side in the vehicle width direction than the joint portion. Vehicle front structure. A vehicle front structure according to any one of claims 1 to 4, wherein
The front part structure of the vehicle by which the center part in the width direction of the said front wheel is arrange | positioned in the position on the front extension line of the said rocker rail.

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