JP2019085038A - Vehicle impact absorber - Google Patents

Abstract

To provide a vehicle impact absorber which enables improvement of cooling performance of a heat exchanger and aerodynamic performance of a vehicle while securing an impact absorption function of a lower absorber with a simple structure.SOLUTION: A vehicle impact absorber includes: a front plate 31 in which a first upper surface 32 located at the upper side is flat and ribs 34, 35 are disposed on a first lower surface 33; a vertical plate 48 extending downward from a rear end of the front plate 31; and a rear plate 41 which extends from a lower end of the vertical plate 48 to the vehicle rear side and in which a second lower surface 42 located below the first upper surface 32 is flat and ribs 44, 45 are disposed on a second upper surface 43. A vehicle rear end 32e of the first upper surface 32 is located close to a vehicle front end 50f of a guide plate 50 extending forward from a radiator 27, a vehicle front end 42f of the second lower surface 42 is located close to a vehicle rear end 61e of a bumper cover lower part 60, and a vehicle rear end 42e is located close to a vehicle front end 55f of an engine undercover 55.SELECTED DRAWING: Figure 2

Description

  The present invention relates to the structure of a shock absorber for a vehicle mounted on the lower front of a vehicle.

  In recent years, from the viewpoint of pedestrian protection, an impact absorber such as a lower absorber is attached to the lower front of the vehicle. The lower absorber contacts the leg of the pedestrian when the vehicle collides with the pedestrian and bounces the pedestrian on the hood of the vehicle to prevent the leg of the pedestrian from being caught in the lower part of the vehicle body (See, for example, Patent Document 1).

  In the engine room at the front of the vehicle, a heat exchanger such as a radiator for cooling the engine cooling water and a condenser for cooling the refrigerant of the air conditioner is provided. In order to operate these heat exchangers efficiently, a guide plate may be provided on the front side of the heat exchangers to guide the air introduced from the air inlet at the front of the vehicle to the heat exchangers.

  This guide plate is often provided at the same position as the lower absorber, and a structure in which a part of the lower absorber doubles as a guide plate has been proposed (see, for example, Patent Document 2). Further, Patent Document 2 describes a configuration in which the lower surface of the lower absorber is covered with an engine undercover to suppress disturbance of the flow of air.

JP 2011-235850 A JP, 2012-1133, A

  By the way, in recent years, common use of vehicle parts has progressed, and there are cases where the arrangement of heat exchangers and the like in the engine room, guide plates, engine undercover, etc. are made common parts and the design surface in front of the vehicle is changed depending on the vehicle type. In this case, if the difference in dimension depending on the vehicle type is absorbed by changing the length of the lower absorber in the longitudinal direction of the vehicle, a gap is created between the air inlet in front of the vehicle and the front of the heat exchanger The introduced air may not flow smoothly to the heat exchanger, or the air flow below the lower absorber may be disturbed to increase air resistance.

  Therefore, the present invention aims to improve the cooling performance of the heat exchanger and the aerodynamic performance of the vehicle by suppressing disturbance of the air flow around the shock absorber while securing the shock absorbing function with a simple structure. Do.

  The shock absorber for a vehicle according to the present invention is a shock absorber for a vehicle attached to the lower front of the vehicle, and has a rib on a first lower surface, which is a back surface of the first upper surface, and whose first upper surface in the vertical direction of the vehicle is flat. Extends from the lower end in the vehicle vertical direction of the longitudinal plate to the rear of the vehicle from the rear end in the vehicle vertical direction of the vehicle from the rear end of the vehicle in the vehicle longitudinal direction And a rear plate on which a second lower surface on the lower side in the vehicle vertical direction is flat and a rib is disposed on a second upper surface which is a rear surface of the second lower surface, and a vehicle rear end of the first upper surface is the front of the vehicle From the heat exchanger in the engine room provided at the rear of the vehicle than the air inlet to the front of the vehicle to guide the air introduced from the air inlet to the heat exchanger at the vehicle front end of the guide plate Close and the vehicle front end of the second lower surface is Close to the vehicle rear end of the bumper cover lower portion covering the end and the first lower surface, and the vehicle rear end of the second lower surface is close to the vehicle front end of the engine undercover which covers the bottom of the engine room , Is characterized.

  As described above, since the vehicle rear end of the first upper surface of the front plate is close to the vehicle front end of the guide plate, the air flowing from the air inlet at the front of the vehicle is made to flow along the guide plate from the first upper surface The heat exchanger can be smoothly introduced into the heat exchanger, and the cooling performance of the heat exchanger can be improved. Further, a vehicle front end and a vehicle rear end of the second lower surface, a vehicle rear end of a bumper cover lower portion covering the front end of the front plate and the first lower surface, and a vehicle front end of an engine undercover covering the bottom of the engine room Because they are close to each other, air flowing from the front of the vehicle to the lower side of the vehicle can be made to flow along the lower side of the bumper cover, the second lower surface, and the engine undercover while traveling. Thereby, it can suppress that the flow of air is disturbed under the shock absorber, and it can reduce air resistance. Furthermore, since the front plate and the rear plate are connected by the vertical plate, the impact absorbing function can be secured, and the pedestrian protection performance can be secured.

  As described above, the shock absorber of the present invention has a simple structure and secures the shock absorbing function while suppressing the disturbance of the air flow around the shock absorber, thereby achieving the cooling performance of the heat exchanger and the aerodynamic performance of the vehicle. It can be improved.

It is a perspective view of a vehicle with which a lower absorber of an embodiment was attached. It is sectional drawing which shows the impact-absorbing body in the engine room along the AA, BB surface of FIG.

  Hereinafter, the lower absorber 30 which is an embodiment of the shock absorber for vehicles will be described with reference to the drawings. The vehicle 10 to which the lower absorber 30 is attached will be described first with reference to FIG.

  As shown in FIG. 1, the vehicle 10 has an engine room 16 that houses an engine and the like on the lower side of the hood 14 on the front side. A bumper cover 18 is attached to the front of the engine compartment 16. The bumper cover 18 is composed of an upper bumper cover 19 and a lower bumper cover 60. An upper air inlet 20 is formed in the bumper cover upper portion 19, and an upper front grill 22 is attached to the upper air inlet 20. A lower air inlet 21 is formed in the bumper cover lower portion 60, and a lower front grill 23 is attached to the lower air inlet 21.

  As shown in FIG. 2, an upper absorber 25 and a reinforcement 24 are disposed behind the bumper cover upper portion 19 in the vehicle. Further, below the lower air inlet 21, a bumper cover lower portion 60 protrudes toward the front of the vehicle. The vehicle front portion 62 of the bumper cover lower portion 60 is covered by the lower frame 65 of the lower front grille 23.

  As shown in FIG. 2, a radiator 27 and a condenser 29 are disposed in an engine room 16 on the vehicle rear side of the upper and lower air inlets 20 and 21. The radiator 27 is a heat exchanger for dissipating the heat of the cooling water of the engine by being hit by traveling air introduced from the upper and lower air inlets 20 and 21 (hereinafter referred to as introduced air). Further, the condenser 29 is a heat exchanger that cools the refrigerant sent from the compressor of the air conditioner by the introduced air into a condensed liquid. The radiator 27 and the capacitor 29 are supported by the radiator support 26 and the capacitor support 28 and attached to the vehicle body.

  Further, below the condenser 29 and the radiator 27, a guide plate 50 is provided which extends from the condenser 29 and the radiator 27 to the front of the vehicle and guides the introduced air to the condenser 29 and the radiator 27. Further, at the bottom of the engine room 16, an engine undercover 55 covering the bottom of the engine room 16 is provided.

  As shown in FIG. 2, a lower absorber 30, which is a shock absorber for a vehicle, is provided between the lower bumper cover 60 on the lower side of the lower air inlet 21, the guide plate 50, and the engine undercover 55. There is.

  The lower absorber 30 includes a front plate 31, a rear plate 41, a vertical plate 48 connecting the front plate 31 and the rear plate 41, and an attachment portion 46. The front plate 31 has a first upper surface 32 on the upper side in the vertical direction of the vehicle having a flat surface, a stepped upper surface 32a on the vehicle rear side of the first upper surface 32, a first lower surface 33 that is a back surface of the first upper surface 32, and a stepped upper surface And a step lower surface 33a, which is the back surface of the base 32a. The first lower surface 33 and the step lower surface 33a are provided with a rib 34 extending in the vehicle width direction and a rib 35 extending in the vehicle longitudinal direction.

  The vertical plate 48 is a plate extending from the vehicle rear end 37 of the front plate 31 toward the lower side in the vehicle vertical direction, and a rib 35 is connected to the surface of the vertical plate 48 on the vehicle front side.

  The rear plate 41 extends rearward from the lower end of the vertical plate 48 in the vehicle vertical direction, has a flat surface, and a second lower surface 42 lower than the first upper surface 32 in the vertical direction of the vehicle and a rear surface of the second lower surface 42 2 and the upper surface 43 are included. The second upper surface 43 is provided with a rib 44 extending in the vehicle width direction and a rib 45 extending in the vehicle front-rear direction. The rib 45 is connected to the surface on the vehicle rear side of the vertical plate 48. The rib 45 provided on the rear plate 41 is provided at the same position in the vehicle width direction as the rib 35 provided on the front plate 31. Therefore, the rib 35 and the rib 45 are connected in the vehicle longitudinal direction and the vehicle longitudinal direction Can transmit the load of

  The mounting portion 46 includes an end plate 46a extending upward in the vehicle vertical direction from the vehicle rear end 41e of the rear plate 41, and an arm 47 extending bendingly from the end plate 46a toward the vehicle rear. Lower absorber 30 is connected to cross member 52 with bolt 53 and nut 54 so that the upper surface of arm 47 in the vehicle vertical direction is in contact with the lower side of cross member 52 extending in the vehicle width direction into engine room 16. It is fixed.

  As shown in FIG. 2, when the lower absorber 30 is attached to the lower front of the vehicle 10, the front end portion 36 of the lower absorber 30 is accommodated in the U-shaped vehicle front portion 62 of the bumper cover lower 60 and the front plate The first lower surface 33, the step lower surface 33a, and the ribs 34, 35 of 31 are covered by a lower plate 61 of a bumper cover lower portion 60 extending from the vehicle front portion 62 toward the vehicle rear. The upper surface of the second upper surface 43 and the ribs 44 and 45 of the rear plate 41 is covered by the guide plate 50.

  When lower absorber 30 is attached to vehicle 10, vehicle rear end 32e of first upper surface 32 of lower absorber 30 approaches vehicle front end 50f of guide plate 50, and vehicle front end 42f of second lower surface 42 is bumper Close to the vehicle rear end 61 e of the lower plate 61 of the cover lower portion 60, the vehicle rear end 42 e of the second lower surface 42 is close to the vehicle front end 55 f of the engine undercover 55. Further, the vehicle front end 32 f of the first upper surface 32 is covered by the upper portion 67 of the lower frame 65 of the lower front grille 23.

  When the vehicle 10 mounted with the lower absorber 30 as described above travels, air is introduced along the upper portion 67 of the lower frame 65 from the lower air inlet 21 of the lower front grille 23 into the engine room 16. The introduced air flows from the upper portion 67 of the lower frame 65 toward the rear of the vehicle along the first upper surface 32 whose surface is flat. The vehicle rear end 32e of the first upper surface 32 of the front plate 31 is close to the vehicle front end 50f of the guide plate 50, and there is no step between the first upper surface 32 and the upper surface of the guide plate 50 at substantially the same height. The introduced air that has flowed to the rear of the vehicle along the first upper surface 32 smoothly flows from the first upper surface 32 along the upper surface of the guide plate 50 into the condenser 29 and the radiator 27.

  Thus, the gap between the vehicle rear end 67e of the upper portion 67 of the lower frame 65 of the lower front grille 23 and the vehicle front end 50f of the guide plate 50 is a continuous surface on the first upper surface 32 of the lower absorber 30. Since the introduced air smoothly flows from the air inlet 21 to the condenser 29 and the radiator 27, the cooling performance of the condenser 29 and the radiator 27 can be improved.

  In addition, the air flow from the front of the vehicle 10 to the lower side of the vehicle 10 along the lower portion 66 of the lower front grille 23 along the lower frame 65 of the lower front grille 23 is from the lower portion 66 of the lower frame 65 below the bumper cover lower portion 60 It flows toward the rear of the vehicle along the lower surface of the plate 61. The vehicle front end 42f of the second lower surface 42 of the lower absorber 30 is close to the vehicle rear end 61e of the lower plate 61 of the bumper cover lower portion 60, and the lower surface of the lower plate 61 and the second lower surface 42 have substantially the same height. Since there is no level difference, the air flowing along the lower surface of the lower plate 61 of the bumper cover lower portion 60 flows toward the rear of the vehicle as a flow along the second lower surface 42 without any large disturbance. Furthermore, the vehicle rear end 42e of the second lower surface 42 is close to the vehicle front end 55f of the engine undercover 55, and there is no step between the second lower surface 42 and the lower surface of the engine undercover 55 at substantially the same height. The air which has flowed along the second lower surface 42 flows rearward of the vehicle along the lower surface of the engine undercover 55 without any major disturbance.

  Since the lower surface of the lower plate 61 of the bumper cover lower portion 60, the second lower surface 42 of the lower absorber 30, and the lower surface of the engine under cover 55 are adjacent to each other as described above, the lower absorber 30 is It is possible to suppress the air flow from being disturbed on the lower side, and to reduce the air resistance of the vehicle 10.

  In the lower absorber 30 according to the embodiment, the front plate 31 and the rear plate 41 are connected by the vertical plate 48, and the rib 35 and the rib 45 are connected in the vehicle longitudinal direction with the longitudinal plate 48 interposed therebetween. Since the load can be transmitted, the impact absorbing function can be secured, and the pedestrian protection performance can be secured.

  As described above, the lower absorber 30 according to the present invention has a simple structure and secures the shock absorbing function while suppressing the disturbance of the air flow around the lower absorber 30, thereby reducing the cooling performance of the condenser 29 and the radiator 27 of the vehicle 10. Aerodynamic performance can be improved.

  10 vehicles, 14 hoods, 16 engine rooms, 18 bumper covers, 19 bumper covers upper part, 20 upper air inlets, 21 lower air inlets, 22 upper front grills, 23 lower front grills, 24 reinforcements, 25 upper absorbers, Reference Signs List 26 radiator support, 27 radiator, 28 capacitor support, 29 capacitor, 30 lower absorber, 31 front plate, 32 first upper surface, 32a step upper surface, 32e, 37, 41e, 42e, 61e, 67e vehicle rear end, 32f, 42f, 50f, 55f Vehicle front end, 33 first lower surface, 33a step lower surface, 34, 35, 44, 45 ribs, 36 front end, 41 rear plate, 42 second lower surface, 43 second upper surface, 46 mounting portion, 46a end plate , 47 arms, 48 vertical plates, 50 guide plates, 2 cross member 53 volts, 54 nut, 55 an engine under cover, 60 bumper cover bottom 61 lower plate, 62 a vehicle front portion, 65 lower frame, 66 lower portion 67 upper portion.

Claims (1)

A shock absorber for a vehicle mounted on the lower front of the vehicle, comprising:
A front plate whose first upper surface in the vertical direction of the vehicle is flat and a rib is disposed on a first lower surface which is a rear surface of the first upper surface;
A longitudinal plate extending downward in the vehicle vertical direction from a rear end in the vehicle longitudinal direction of the front plate;
The second lower surface of the vertical plate extends rearward from the lower end of the vehicle in the vertical direction of the vehicle, and the second lower surface below the first upper surface in the vertical direction of the vehicle is flat, and a rib is disposed on the second upper surface which is the rear surface of the second lower surface. With the rear plate,
Have
The rear end of the first upper surface of the vehicle extends from the heat exchanger in the engine room provided at the rear of the vehicle than the air inlet at the front of the vehicle toward the front of the vehicle to heat the air introduced from the air inlet. Close to the vehicle front end of the guide plate that guides the exchanger,
The vehicle front end of the second lower surface is close to the vehicle rear end of the bumper cover lower portion covering the front end of the front plate and the first lower surface, and the vehicle rear end of the second lower surface is the bottom of the engine room Being close to the vehicle front end of the covering engine undercover,
Shock absorber for vehicles characterized by