JP4852977B2 - Vehicle rear structure - Google Patents

Description

  The present invention relates to a vehicle rear structure having a structure for holding a spare tire.

Generally, a spare tire holding device that holds a spare tire is provided at the rear of the vehicle. As such a spare tire holding device, for example, a device described in Patent Document 1 is known. The spare tire holding device described in this document includes left and right brackets attached to a lower surface of a vehicle floor, a main member attached to these brackets so as to be swingable, and a sub member integrally attached to the main member, And a hanger rod for lifting the main member, and a spare tire is mounted on a frame composed of the main member and the sub member.
JP 2002-173057 A

  However, the vehicle rear structure according to the prior art described above has not been configured to absorb the impact when the vehicle is bumped (rear) from the rear side.

  The objective of this invention is providing the vehicle rear part structure which can absorb the impact when a vehicle is collided rearward efficiently.

The present invention provides a vehicle rear structure that is disposed at the rear of a vehicle and includes a holding unit that holds a spare tire, and a rear suspension that connects the vehicle body and left and right rear wheels. A pair of support arms that are rotatably connected to a skeleton member that forms part of the vehicle body so as to extend, and that support the left and right rear wheels, and a pair of supports that extend in the left-right direction of the vehicle in front of the holding unit. An intermediate beam connecting the arms, and the intermediate beam has a shape that opens upward and downward with respect to the rear side of the vehicle, and extends upward and downward from the support arm . at least part of the vertical direction of the holding unit is characterized in that overlaps the vertical range of the intermediate beam regardless vertical movement of the intermediate beam.

When a vehicle having such a rear structure is struck rearward, the holding unit holding the spare tire is pushed and moves forward of the vehicle. Since rear suspension which moves up and down in accordance with the traveling state of the vehicle or the like, the intermediate beam moves up and down with this, in a side view, at least part of the vertical direction of the holding unit, the upper and lower intermediate beam Regardless of movement, it overlaps the vertical range of the intermediate beam. Therefore, when the holding unit moves forward of the vehicle at the time of rear collision, the holding unit hits the intermediate beam, so that the load received by the holding unit at the time of rear collision is transmitted to the skeleton member via the intermediate beam and the support arm. become. As a result, it is possible to efficiently absorb an impact when the vehicle is bumped rearward.

Preferably, the holding unit is fixed to the frame member has at least two holding bars held in a state of hanging the spare tire, the holding bar has a hanging portion Nokkaru spare tire, side In view, the suspended portion overlaps the range of the intermediate beam in the vertical direction regardless of the vertical movement of the intermediate beam.

As described above, since the holding unit has a simple structure in which at least two holding bars are fixed to the skeleton member, the cost of the holding unit can be suppressed and the weight of the holding unit can be reduced. Moreover, since the suspension part of a holding bar becomes a structure extended in a horizontal direction with respect to a vehicle, the load transmission when a holding unit moves ahead of a vehicle can be performed effectively. Therefore, in the side view, the suspension part of the holding bar overlaps with the vertical range of the intermediate beam regardless of the vertical movement of the intermediate beam, so that the impact when the vehicle is rear-projected can be more efficiently performed. Can be absorbed.

  At this time, the two holding bars are preferably arranged in an X shape with respect to the front-rear direction of the vehicle. In this case, when one side of the vehicle is rearwardly bumped, the load received by the holding unit is transmitted to the skeleton member via the intermediate beam and the support arm, and at the same time, the load with respect to the longitudinal direction of the vehicle. It is effectively transmitted to the other side of the vehicle (opposite the collision side) via the holding bar extending obliquely. Thereby, the deformation of the skeleton member on the collision side can be sufficiently reduced.

  Further, the two holding bars may be arranged in a V shape or a substantially V shape that opens with respect to the rear side of the vehicle. In this case, when one side of the vehicle is rearwardly bumped, the load received by the holding unit is transmitted to the skeleton member via the intermediate beam and the support arm, and at the same time, the load with respect to the longitudinal direction of the vehicle. It is transmitted to the other side of the vehicle (opposite the collision side) via a holding bar extending obliquely. Thereby, deformation of the skeleton member on the collision side can be reduced. Moreover, when arrange | positioning two holding bars in V shape, the said two holding bars can be fixed only in three places by overlapping the end parts of each holding bar.

  ADVANTAGE OF THE INVENTION According to this invention, the impact when a vehicle is collided back can be absorbed efficiently. Thereby, the deformation of the skeleton member can be reduced, and consequently, the deformation of the cabin can be sufficiently suppressed.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a vehicle rear structure according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic view including a partial cross section showing an embodiment of a vehicle rear structure according to the present invention, and FIG. 2 is a rear view of the vehicle rear structure shown in FIG. In each figure, the vehicle 1 includes a skeleton member 3 that constitutes a part of the vehicle body 2.

  The skeleton member 3 has a pair of floor side members 4 disposed on the left and right sides of the vehicle 1 and extending in the front-rear direction of the vehicle 1, and rear portions of these floor side members 4 constitute rear floor side members 5. Yes. The rear floor side member 5 is configured to be higher than the center portion of the floor side member 4. The left and right rear floor side members 5 are connected to each other via two rear floor cross members 6 and 7 extending in the left and right direction (vehicle width direction) of the vehicle 1. These rear floor cross members 6 and 7 are respectively coupled to the left and right rear floor side members 5 at a predetermined interval. In front of the rear floor side member 6, a center floor cross member 8 that connects the central portions of the left and right floor side members 4 is disposed. Further, side sills (rockers) 9 are respectively coupled to the floor side members 4 on both the left and right sides.

  A holding unit 11 that holds a spare tire 10 is provided at the rear of the vehicle 1. The holding unit 11 is mainly composed of six holding bars 12 to 17 and holds the spare tire 10 in a suspended state.

  The holding bars 12 and 13 extend in the left-right direction of the vehicle 1. The holding bar 12 includes a holding portion 12a extending in a substantially flat shape, and a pair of bent portions 12b provided at both ends of the holding portion 12a and bent in an L shape. Both end portions of the holding bar 12 are respectively fixed to the lower surface of the rear floor cross member 6. The holding bar 13 includes a holding portion 13a that extends in a substantially flat shape, and a pair of bent portions 13b that are provided at both ends of the holding portion 13a and bent into an L shape. Both end portions of the holding bar 13 are fixed to the lower surfaces of the rear floor side members 5 on the left and right sides, respectively. The holding bars 14 and 15 extend in the front-rear direction of the vehicle 1 on both the left and right sides of the vehicle 1. One end portions of the holding bars 14 and 15 are fixed to both ends of the holding portion 12a of the holding bar 12, and the other end portions of the holding bars 14 and 15 are fixed to both ends of the holding portion 13a of the holding bar 13, respectively. .

  The holding bars 16 and 17 are arranged in an X shape with respect to the front-rear direction of the vehicle 1. That is, the holding bars 16 and 17 extend in a cross shape obliquely with respect to the longitudinal direction of the vehicle 1. One end portions of the holding bars 16 and 17 are fixed to both ends of the holding portion 12a of the holding bar 12, respectively, and the other end portions of the holding bars 16 and 17 are fixed to both ends of the holding portion 13a of the holding bar 13, respectively. . A hexagonal plate member 18 is interposed between the holding bars 16 and 17 and the spare tire 10 to fix the wheel of the spare tire 10 with bolts or the like. Thereby, the holding bars 16 and 17 holding the spare tire 10 are reinforced strongly.

  The holding part 12 a of the holding bar 12, the holding part 13 a of the holding bar 13 and the holding bars 14 to 17 constitute a hanging part P on which the spare tire 10 is placed. In addition, a bolt, a pin, etc. are used as a fixing means of the holding | maintenance bars 12-17.

  The vehicle 1 also includes a rear suspension 20 that connects the skeleton member 3 and the left and right rear wheels 19. As shown in FIGS. 1 to 3, the rear suspension 20 has a pair of trailing arms 22 that extend in the front-rear direction of the vehicle 1 and support the left and right rear wheels 19 via hub carriers 21. ing. A toe collect push part 23 is provided at the front end of each trailing arm 22, and the toe collect push part 23 is rotatably connected to the rear floor side member 4. A shock absorber 24 is attached to the trailing arm 22, and a coil spring 25 is disposed around the shock absorber 24. An upper support 26 is provided at the upper end (tip) of the shock absorber 24.

  The pair of trailing arms 22 are connected to each other via an intermediate beam 27 extending in the left-right direction of the vehicle 1. The intermediate beam 27 is disposed on the front side of the vehicle 1 with respect to the holding unit 11. The intermediate beam 27 has a substantially V-shaped cross section that opens to the rear side of the vehicle 1, and extends above and below the trailing arm 22.

  In such a rear suspension 20, the shock absorber 24 moves up and down in accordance with the traveling state, vibration, and the like of the vehicle 1, and the trailing arm 22 is rotated in accordance with this, so that it is coupled to the trailing arm 22. The intermediate beam 27 moves up and down. In the present embodiment, as shown in FIG. 1, the height position of the hanging portion P in the holding unit 11 matches the height position of a part of the intermediate beam 27 regardless of the vertical movement of the intermediate beam 27. .

  In the present embodiment configured as described above, when another vehicle makes a rear-end collision (rear collision) at the rear portion of the vehicle 1 while the vehicle 1 is traveling or stopped, for example, as shown in FIG. Since the rear end and the rear floor cross member 7 are pushed and deformed, the holding bars 12 to 17 of the holding unit 11 move together with the spare tire 10 to the front of the vehicle 1. At this time, since the height position of the suspension part P of the holding unit 11 matches the height position of a part of the intermediate beam 27 regardless of the vertical movement of the intermediate beam 27, the suspension part P is reliably It comes into contact with the intermediate beam 27.

  For this reason, the load input to the rear floor side member 5 and the like when the vehicle 1 is rearwardly impacted is not only transmitted to the front of the floor side member 4 and the side sill 9 as it is, but also passed through the holding bars 12 to 17. It also flows to the suspension 20 and is transmitted from the rear suspension 20 to the front of the floor side member 4, the side sill 9, and the left and right rear wheels 19. Further, the load is transmitted to the spare tire 10 via the plate member 18 that reinforces the holding bars 16 and 17.

  In this way, the load received when the vehicle 1 is impacted rearward is dispersed and efficiently transmitted to the floor side member 4 and the side sill 9. Thereby, a deformation | transformation of the floor side member 4 grade | etc., Can be suppressed.

  Further, when another vehicle collides with one side of the rear part of the vehicle 1 while the vehicle 1 is traveling or stopped (as shown in FIG. 5B), as shown in FIG. The rear end portion and one side portion of the rear floor cross member 7 are deformed. At this time, the holding unit 11 has holding bars 16 and 17 arranged in an X shape with respect to the front-rear direction of the vehicle 1. For this reason, the load input to the rear floor side member 5 on one side is transmitted to the rear floor side member 5 on the opposite side through the holding bar 12 and the rear floor cross member 6 through either the holding bar 13 or the holding bars 16, 17. (See the arrow in FIG. 5B).

  When the deformation of the rear floor side member 5 on one side further proceeds, the spare tire 10 moves obliquely forward and comes into contact with the rear floor cross member 6 as shown in FIG. For this reason, the load input to the rear floor side member 5 on one side further passes through the plate member 18, the spare tire 10 and the rear floor cross member 6 from either one of the holding bars 16, 17 to the rear floor side member 5 on the opposite side. It is transmitted (see the arrow in FIG. 5C).

  Thus, the load received when the vehicle 1 is struck after the offset is dispersed and efficiently transmitted to the floor side member 4 and the side sill 9. Thereby, a deformation | transformation of the floor side member 4 grade | etc., At the side of a collision can be suppressed.

  As described above, according to the present embodiment, it is possible to efficiently absorb an impact when the vehicle 1 is impacted rearward. Thereby, the deformation of the vehicle body 2 that occurs at the time of a rear collision is reduced, so that the deformation of the rear seat can be sufficiently suppressed.

  Further, since it is not necessary to newly add parts such as members for absorbing the impact at the time of a rear collision, an increase in cost and an increase in the weight of the vehicle body 2 can be suppressed.

  FIG. 6 is a schematic view including a partial cross section showing another embodiment of the vehicle rear structure according to the present invention. In the drawing, the same reference numerals are given to the same or equivalent members as those of the above-described embodiment, and the description thereof is omitted.

  In the figure, the vehicle rear portion structure of the present embodiment includes a holding unit 30 instead of the holding unit 11 in the above-described embodiment. The holding unit 30 is mainly composed of holding bars 12 to 15 and holding bars 31 and 32 similar to those in the above-described embodiment, and holds the spare tire 10 in a suspended state.

  The holding bars 31 and 32 are arranged in a V shape that opens to the rear side of the vehicle 1. One end portions of the holding bars 31 and 32 are fixed to both ends of the holding portion 13 a of the holding bar 13, respectively, and the other end portions of the holding bars 31 and 32 are overlapped with the central portion of the holding portion 12 a of the holding bar 12. It is fixed with. As a result, when the holding bars 31 and 32 are fixed with bolts, pins or the like, only three of these components are required. The other end portions of the holding bars 31 and 32 may be fixed to the holding portion 12a of the holding bar 12 at a predetermined interval so that the holding bars 31 and 32 are substantially V-shaped. A trapezoidal plate member 33 for fixing the wheel of the spare tire 10 with bolts or the like is interposed between the holding bars 31 and 32 and the spare tire 10.

  Even in the present embodiment configured as described above, when the vehicle 1 is bumped after the offset, the load input to the rear floor side member 5 on one side is either the holding bar 13, the holding bar 31, 32, or the holding bar. 12 and the rear floor cross member 6 are transmitted to the opposite rear floor side member 5. Thereby, a deformation | transformation of the floor side member 4 grade | etc., At the rear side can be reduced.

  The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the holding unit is mainly configured by six holding bars. However, at least two holding bars may be used. An example of a holding unit configured with two holding bars is shown in FIG.

  In FIG. 7, the holding unit 50 has holding bars 51 and 52 arranged in an X shape with respect to the front-rear direction of the vehicle 1. The holding bar 51 includes a holding portion 51a and a pair of bent portions 51b that are provided at both ends of the holding portion 51a and bent in a substantially L shape. The holding bar 52 includes a holding portion 52a and a pair of bent portions 52b that are provided at both ends of the holding portion 52a and bent in a substantially L shape. One end of the holding bars 51, 52 is fixed to the lower surface of one rear floor side member 5, and the other end of the holding bars 51, 52 is fixed to the lower surface of the other rear floor side member 5. Note that one end of the holding bars 51 and 52 may be fixed to the rear floor cross member 6, and the other end of the holding bars 51 and 52 may be fixed to the rear floor cross member 7. The holding parts 51a and 52a constitute a hanging part P on which the spare tire 10 is placed.

  Further, the holding bars 51 and 52 may be arranged in a V shape or a substantially V shape that opens with respect to the rear side of the vehicle 1. In this case, one end of the holding bars 51 and 52 may be fixed to the rear floor cross member 6 and the other end of the holding bars 51 and 52 may be fixed to the rear floor side member 5 or the rear floor cross member 7.

  In the above embodiment, the holding unit is configured using a plurality of holding bars. However, the structure of the holding unit is not particularly limited to this, and may be a box-like structure, for example. In this case, the height position of at least a part of the holding unit may be matched with the height position of the intermediate beam 27 regardless of the vertical movement of the intermediate beam 27.

1 is a schematic view including a partial cross section showing an embodiment of a vehicle rear structure according to the present invention. It is a reverse view of the vehicle rear part structure shown in FIG. It is a perspective view of the rear suspension shown in FIG. It is a figure which shows a mode that a holding | maintenance bar | burr hits an intermediate beam when the vehicle shown in FIG. It is a figure which shows a mode that the load received when the vehicle shown in FIG. 1 is collided after offset is transmitted. It is the schematic containing the partial cross section which shows other embodiment of the vehicle rear part structure concerning this invention. It is a figure which shows the modification of the holding | maintenance unit shown in FIG.1 and FIG.2.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Vehicle body, 3 ... Frame member, 10 ... Spare tire, 11 ... Holding unit, 12-17 ... Holding bar, 12a, 13a ... Holding part, 19 ... Left and right rear wheel, 20 ... Rear suspension, 22 ... trailing arm (support arm), 27 ... intermediate beam, 30 ... holding unit, 31, 32 ... holding bar, 50 ... holding unit, 51, 52 ... holding bar, P ... hanging part.

Claims (4)

In a vehicle rear structure including a holding unit that is arranged at the rear of the vehicle and holds a spare tire, and a rear suspension that connects the vehicle body and the left and right rear wheels of the vehicle,
The rear suspension is rotatably connected to a skeleton member that forms a part of the vehicle body so as to extend in the front-rear direction of the vehicle, and a pair of support arms that support the left and right rear wheels;
An intermediate beam connecting the pair of support arms so as to extend in the left-right direction of the vehicle in front of the holding unit;
The intermediate beam has a shape that opens in the vertical direction with respect to the rear side of the vehicle, and extends above and below the support arm.
In a side view, at least part of the vertical direction of the holding unit is a vehicle rear structure which is characterized in that overlaps the vertical range of the intermediate beam regardless vertical movement of the intermediate beam. The holding unit has at least two holding bars that are fixed to the frame member and hold the spare tire in a suspended state,
The holding bar has a hanging portion on which the spare tire is placed,
2. The vehicle rear structure according to claim 1 , wherein , in a side view, the suspension portion overlaps a range in a vertical direction of the intermediate beam regardless of the vertical movement of the intermediate beam.   The vehicle rear portion structure according to claim 2, wherein the two holding bars are arranged in an X shape with respect to a longitudinal direction of the vehicle.   The vehicle rear portion structure according to claim 2, wherein the two holding bars are arranged in a V shape or a substantially V shape that opens with respect to a rear side of the vehicle.

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