JP6418480B2 - Peripheral structure of trailing arm bracket - Google Patents

Description

  The present invention relates to a peripheral structure of a trailing arm bracket that supports a base end portion of a trailing arm so as to be swingable.

  A pair of left and right rear side members are disposed on the rear lower surface of the automobile along the vehicle front-rear direction. On the other hand, a side sill is provided along the vehicle front-rear direction on the lower side of the side surface corresponding to the door opening of the vehicle body.

  The trailing arm suspension is supported by a substantially U-shaped trailing arm bracket so that the base end of the trailing arm is pivotally supported. The tip of the trailing arm rotatably supports the wheel. ing. In the middle of the trailing arm, the lower side of a shock absorber made up of a spring and a shock absorber having an upper end attached to the lower surface of the side member is mounted to support the trailing arm so that it can swing in the vertical direction.

  For example, Patent Document 1 and Patent Document 2 are known as structures related to the trailing arm bracket. Patent Document 1 discloses an example in which a proximal end portion of a trailing arm is supported between an inner wall and an outer wall of a mounting bracket of the trailing arm. Patent Document 2 discloses an example in which an extension is provided on a rear floor side member, and a bracket is attached to the extension.

JP 2012-051497 A JP 2003-154971 A

  By improving the mounting rigidity of the trailing arm bracket, the running stability is improved and the basic performance of the suspension design can be secured. For this reason, the basic performance can be ensured without depending on the performance of the suspension parts (spring, absorber) as in the above example. Moreover, since the improvement in rigidity leads to a reduction in weight, it can also be used to reduce the vehicle weight.

  On the other hand, jack-up points and suspension hook points used during vehicle maintenance and transportation require a large load to secure the overall vehicle movement, and it is necessary to ensure high rigidity. In many cases, the point is set on an outer flange or the like of the side sill. Here, since the side sill has a shape but is a single plate, the side sill is lower in rigidity than the skeleton member, and a process such as setting a large reinforcing member and cooperating with the vehicle body rigidity is required.

  The present invention has been made in order to solve the above-mentioned problems. The object of the present invention is to arrange a side member, a trailing arm bracket, a side sill, and a minimum jack-up reinforcement force in a compact manner so that the rigidity of each other is improved. It is to provide a highly rigid structure while being lightweight.

In order to achieve the above object, in the peripheral structure of the trailing arm bracket according to the present invention, the trailing arm bracket for swingably supporting the base end portion of the trailing arm is supported by the side member and the side sill on the side of the vehicle. Configured to be In the peripheral structure, a jack-up reinforcement is disposed on the side sill, and the reinforcement, the side sill, and the side member are joined in a three-layered state.
Further, the trailing arm bracket includes an inner member and an outer member disposed on the outer side in the vehicle width direction than the inner member, and the vehicle lower portion of the side sill and the side member are viewed in the vehicle width direction. Corners are formed around the overlapping portions, and the outer member is formed to have a triangular shape that fits the corners as viewed in the vehicle width direction, and the reinforcement , the side sill, and the trailing arm bracket are: The three-layer joined portion including the trailing arm bracket is disposed in the vehicle lower side of the side member, and the three-layer joined portion including the side member is joined to the corner portion. It is arranged to be adjacent to.

  Further, in one aspect of the peripheral structure of the trailing arm bracket according to the present invention, the side member is provided with a recess recessed upward in the vehicle between the outer member and the inner member in the vehicle width direction. A support shaft that supports the ring arm is disposed so as to connect the outer member and the inner member in a state of straddling the recess, and a vehicle vertical direction position of the support shaft includes the trailing arm bracket 3 The joints are arranged so as to be substantially the same as the position in the vehicle vertical direction of the joining portion of the stacked sheets, and the reinforcement and the support shaft are arranged so as to overlap each other when viewed in the vehicle width direction.

Further, the peripheral structure of the trailing arm bracket according to the present invention is configured such that the trailing arm bracket that supports the base end portion of the trailing arm so as to be swingable is supported by the side member and the side sill of the vehicle side portion. Is done. In the peripheral structure, a jack-up reinforcement is disposed on the side sill, the reinforcement, the side sill, and the side member are joined in a three-layered state, and the reinforcement is a horizontal surface portion. And an outer vertical wall extending from the outer side in the vehicle width direction of the horizontal plane portion to the lower side of the vehicle, and an inner vertical wall extending from the inner side of the horizontal plane portion in the vehicle width direction to the upper side of the vehicle.
Further, in one aspect of the peripheral structure of the trailing arm bracket according to the present invention, the reinforcement, the side sill, and the trailing arm bracket are stacked in the vicinity of the three-layered joint including the side member. It is joined in the state of.

According to the present invention, the reinforcement strength of the reinforcement is improved by joining the reinforcement for jacking up to the side member constituting the skeleton of the vehicle body. Furthermore, it is possible to ensure high rigidity by collecting the peripheral structure of the bracket in the peripheral area of the corner portion and making it compact.

  According to one aspect of the present invention, the supporting shaft of the trailing arm is brought as close to the side member as possible by the recess provided in the side member, and the outer member and the reinforcement are joined at the vehicle vertical direction position of the supporting shaft. It is possible to transmit the load from the portion to the inner member from the outer member via the support shaft, and to receive the load as a whole.

Further, according to this onset bright, by joining reinforcement for jacking up the side members constituting the vehicle body framework, improves mounting rigidity of the reinforcement is. Furthermore, by making the reinforcement into a bent shape by the vertical wall and the horizontal portion, the jack-up load has an effect of improving the rigidity by the bent shape at the portion of the side sill. Moreover, it becomes possible to form a through-hole (hook, convex member insertion) for fixing during transportation on the horizontal plane.
Further, according to one aspect of the present invention, the attachment rigidity of the reinforcement can be obtained by connecting the reinforcement for jack-up to the trailing arm bracket that is a support part of the suspension around the vehicle body and attached with high rigidity. Can be secured. Further, since the load from the suspension around the foot can be transmitted to the side sill via the reinforcement, suspension rigidity can be ensured. Furthermore, since the reinforcement is joined to the trailing arm bracket at a position different from the three-layer joint including the side member, each joint can be connected to a separate high-rigidity member. The dispersion of the vehicle body (stress distribution) improves the resistance of the vehicle body to the suspension load.

It is a bottom view of a vehicle body provided with the peripheral structure of the trailing arm bracket of one embodiment according to the present invention. FIG. 2 is a perspective view of a peripheral structure of the trailing arm bracket of FIG. FIG. 2 is an enlarged bottom view of the peripheral structure of the trailing arm bracket of FIG. 1. FIG. 4 is a side view of FIG. 3. It is the side view which abbreviate | omitted the side sill before the paper surface of FIG. FIG. 3 is a perspective view of the peripheral structure of the trailing arm bracket of FIG. 2 as viewed from an obliquely rear side on the outer side in the vehicle width direction with a side sill omitted. It is AA sectional drawing of FIG.

  Hereinafter, an embodiment of a peripheral structure of a trailing arm bracket according to the present invention will be described with reference to the drawings (FIGS. 1 to 7).

  The peripheral structure of the trailing arm bracket of the present embodiment is a structure in which a reinforcement 40 for jacking up is attached to a side sill 30 to which the trailing arm bracket 20 is connected.

  The trailing arm bracket 20 is a member that supports a base end portion of a trailing arm (not shown) in a swingable manner, and is supported by a rear side member 10 and a side sill 30 on the side of the vehicle. The reinforcement 40 is a member arranged so as to be able to be joined along the shape of the side sill 30, joined to the trailing arm bracket 20 via the side sill 30, and further to the rear side member 10 via the side sill 30. Are also joined.

  The rear side member 10 is provided with a first joint 10p that is joined to the reinforcement 40 with the side sill 30 interposed therebetween. The trailing arm bracket 20 is provided with the side sill 30 at a position different from the first joint 10. A second joint 22p that is interposed and joined to the reinforcement 40 is provided. The first junction 10p and the second junction 22p will be described later.

  First, members constituting the peripheral structure of the trailing arm bracket of this embodiment will be described.

  In the present embodiment, as shown in FIG. 1, a pair of left and right rear side members 10 are disposed on the rear lower surface of the vehicle along the vehicle front-rear direction. Side sills 30 are provided along the vehicle front-rear direction below the left and right side surfaces corresponding to the door opening of the vehicle body. An outer panel serving as a side body (not shown) is disposed outside the side sill 30. The outer panel constitutes the side surface of the vehicle body. On the outer side of the side sill 30 in the vehicle width direction, a jack-up reinforcement 40 is disposed along the shape of the side sill 30. Although not shown, an outer panel is disposed outside the reinforcement 40 in the vehicle width direction.

  The rear side member 10 is made of a long steel material having a substantially U-shaped cross section, and is disposed on the left and right lower surfaces of the floor panel 18 along the vehicle front-rear direction. The rear side member 10 is a member constituting the skeleton of the vehicle body and has high rigidity.

  The rear side member 10 is provided with an inner recess 10a as shown in FIGS. The inner recessed portion 10a is configured such that a portion on the inner side in the vehicle width direction of the lower surface (upper surface in FIG. 2) of the rear side member 10 is recessed upward (downward in FIG. 2).

  A floor side member 11 is disposed in front of each rear side member 10 in the vehicle. The floor side member 11 is connected to the rear side member 10 via a side member joint member 15. The side member joint member 15 is T-shaped when viewed from above the vehicle, and a cross member 13 extending in the vehicle width direction is connected to the inside of the side member joint member 15 in the vehicle width direction. Both ends of the cross member 13 are connected to side member joint members 15 disposed on both sides in the vehicle width direction. Similarly to the rear side member 10, the floor side member 11 and the cross member 13 are high-rigidity members that constitute the skeleton of the vehicle body.

  A side sill 30 is disposed outside the rear side member 10 in the vehicle width direction. The side sill 30 is a member that forms an opening on the side surface of the vehicle body and is disposed at the lower portion of the door. As shown in FIG. 2, the side sill 30 is formed with a flat portion 32 that extends along the vehicle front-rear direction, and a flange portion 31 that extends downward in the vehicle (upward in FIG. 2) outside the flat portion 32 in the vehicle width direction. Is provided. Further, on the inner side in the vehicle width direction of the flat portion 32, an inner end of the flat portion 32 is bent upward (downward in FIG. 2) to form a side surface portion 33 extending upward of the vehicle. The flat portion 32 is formed with a jack hole. This hole communicates with a transport fixing hole 45 formed in the reinforcement 40. The side sill 30 is joined to the vehicle lower portion of the rear side member 10 by spot welding or the like.

  3-5, the part (1st junction part 10p) joined to the side part 33 of the side sill 30 is provided in the vehicle width direction outer side of the rear side member 10. As shown in FIG. The first joint portion 10p is a portion that is joined to the reinforcement 40 with the side sill 30 interposed therebetween. The relationship between the first joint 10p and the reinforcement 40 will be described later.

  As shown in FIG. 5, the flange portion 31 constituting the vehicle lower end piece of the side sill 30 and the rear side member 10 form a corner portion 35 when viewed in the vehicle width direction. The corner portion 35 is a portion formed in the vehicle rear region of the side member joint member 15.

  The rear side member 10 is inclined upward from the connecting portion of the side member joint member 15 toward the rear of the vehicle (downward in FIG. 2). The rear side member 10 and the flange portion 31 extending horizontally are arranged so as to virtually constitute two sides of a triangle when viewed in the vehicle width direction. The triangular area is virtually indicated by a one-dot chain line in FIG.

  The corner portion 35 includes the periphery of the portion where the rear side member 10 begins to tilt, and the vertex formed by the horizontal flange portion 31 from the portion overlapping in the vehicle width direction to the rear of the vehicle, that is, the two sides of the triangle. Furthermore, it is formed in a region slightly behind the vehicle from its apex. That is, the corner portion 35 is a triangular region virtually illustrated in FIG. Further, the first joint 10p described above is adjacent to a region where the corner 35 is formed.

  The trailing arm bracket 20 is a member on which the base end of the trailing arm is pivotally supported so that a wheel (not shown) is rotatably supported at the tip of the trailing arm. The trailing arm bracket 20 is attached to the vehicle lower portion of the rear side member 10 at the vehicle rear side of the side member joint member 15.

  As shown in FIGS. 2 and 6, the trailing arm bracket 20 includes an inner member 21 and an outer member 22 that is disposed on the outer side in the vehicle width direction of the inner member 21 with an interval in the vehicle width direction. . The inner member 21 is attached to the inner side in the vehicle width direction of the rear side member 10. Outer member 22 is attached to the vehicle width direction outer side part (the part which is not dented) rather than inner side crevice 10a among the vehicles lower surfaces of rear side member 10 (Drawing 6). The inner member 21 and the outer member 22 are configured to have a U shape that opens rearward of the vehicle as viewed from above the vehicle. In addition, the inner member 21 is provided with an inner flat portion 21a in which a plane is formed in a side view, and the outer member 22 is provided with an outer flat portion 22a in which a plane is formed in a side view.

  The outer flat portion 22a of the outer member 22 has a substantially triangular shape when viewed in the vehicle width direction. One side of the triangular shape extends along the vehicle lower surface of the rear side member. A side extending from the front end of the vehicle toward the rear of the vehicle extends substantially horizontally along the flat portion 32 of the side sill 30. The side connecting them extends substantially vertically. The triangular shape is arranged so as to be matched with the virtually formed triangle of the corner portion 35 described above.

  Further, a side sill abutting portion 22c that abuts on the side sill 30 is provided at the rear portion of the outer flat portion 22a. The side sill contact portion 22c extends from the rear portion of the outer flat portion 22a toward the outer side in the vehicle width direction. The front end of the side sill contact portion 22c on the outer side in the vehicle width direction becomes the second joint portion 22p that joins the side sill 30. The second joint portion 22p is joined to the reinforcement 40 with the side sill 30 interposed. The relationship between the second joint 22p and the reinforcement 40 will be described later.

  Further, as shown in FIGS. 2 and 6, shaft insertion holes 21b and 22b are formed in the inner flat portion 21a and the outer flat portion 22a, respectively. A support shaft 50 that supports the arm is inserted. 2, 3, and 6, the support shaft 50 is virtually indicated by a two-dot chain line. The support shaft 50 extends in the vehicle width direction and is disposed in a state of straddling the inner recess 10 a of the rear side member 10. Both ends of the support shaft 50 are inserted into shaft insertion holes 21b and 22b of the inner flat portion 21a and the outer flat portion 22a.

  The vehicle vertical position of the support shaft 50 is arranged to be substantially the same as the vehicle vertical position of the second joint 22p. At this time, the reinforcement 40 and the support shaft 50 are arranged so as to overlap when viewed in the vehicle width direction.

  Here, the structure of the reinforcement 40 for jackup is demonstrated. The reinforcement 40 is disposed outside the side sill 30 in the vehicle width direction so as to be joinable along the shape of the side sill 30. The reinforcement 40 is a member formed so that a metal plate material can be bent, and includes a horizontal plane portion 42, an outer vertical wall 41, and an inner vertical wall 43. The reinforcement 40 includes a horizontal plane portion 42, an outer vertical wall 41, and an inner vertical wall 43, and is formed in a crank shape when viewed from the front of the vehicle.

  The horizontal surface portion 42 extends along the flat portion 32 of the side sill 30 and is formed in a substantially parallel manner, and is attached so as to overlap the vehicle upper side surface of the flat portion 32 of the side sill 30. The horizontal plane portion 42 is formed with a transport fixing hole 45. A convex member such as a hook can be inserted into the transport fixing hole 45. The horizontal surface portion 42 is attached to the flat portion 32 in a state where the transport fixing hole 45 communicates with a jack hole provided in the flat portion 32 of the side sill 30. Further, the outer vertical wall 41 is a vertical wall extending from the outer side in the vehicle width direction of the horizontal plane portion 42 to the vehicle lower side, and is attached to the flange portion 31 of the side sill 30.

  The inner vertical wall 43 is a vertical wall extending from the inner side in the vehicle width direction of the horizontal plane part 42 to the upper side of the vehicle (lower side in FIG. 2), and is joined to the side part 33 above the vehicle from the flat part 32 of the side sill 30. As described above, the second joining portion 22p provided on the outer member 22 of the trailing arm bracket 20 is joined to the inner vertical wall 43 with the side sill 30 interposed therebetween. Similarly, the first joint portion 10 p provided on the rear side member 10 is joined to the inner vertical wall 43 with the side sill 30 interposed.

  In this 2nd junction part 22p, the inner side vertical wall 43, the side sill 30, and the outer side member 22 are joined in the state of 3 sheets piled up. In this example, the side wall 33 of the side sill 30 is sandwiched between the inner vertical wall 43 and the outer member 22 of the trailing arm bracket 20, and the inner vertical wall 43, the side sill 30, and the outer The members 22 are joined in the state of being overlapped in the order of three.

  The 1st junction part 10p is provided in the vehicle front of the 2nd junction part 22p at intervals. As described above, the first joint portion 10p is adjacent to the corner portion 35 (FIG. 5).

  The second joint portion 22p is disposed below the rear side member 10 in the vehicle and above the vehicle from the flange portion 31 of the side sill 30. That is, the second joint portion 22p is disposed between the lower end piece (flange portion 31) of the side sill 30 and the vehicle lower portion of the rear side member as viewed in the vehicle width direction.

  Further, the rear side member 10 in the vicinity of the second joint portion 22p is slightly curved so as to slightly approach the inner side in the vehicle width direction. In this example, the second joint portion 22p is disposed between the curved outer side direction of the rear side member 10 and the inner side of the side surface portion 33 of the side sill 30 in the vehicle width direction.

  Further, as described above, the inner vertical wall 43 is disposed so as to overlap the support shaft 50 when viewed in the vehicle width direction.

  As can be seen from the above description, according to the present embodiment, the attachment rigidity of the reinforcement 40 is improved by joining the reinforcement 40 for jack-up to the rear side member 10 constituting the skeleton of the vehicle body.

  Further, according to the present embodiment, the attachment force of the reinforcement 40 is secured by joining the reinforcement 40 to the trailing arm bracket 20 that is a support portion of the suspension around the vehicle body and attached with high rigidity. Is possible. Further, since the load from the suspension around the foot can be transmitted to the side sill 30 through the reinforcement 40, suspension rigidity can be ensured.

  Furthermore, since the reinforcement 40 is joined to the trailing arm bracket 20 at a position (second joining part 22p) different from the three-layered first joining part 10p, the first joining part 10p and the second joining part are joined. It becomes possible to join to separate high-rigidity members by 22p, load distribution (stress distribution) is performed, and resistance to the suspension load of the vehicle body is improved.

  Further, according to the present embodiment, high rigidity is ensured by consolidating the peripheral structure of the trailing arm bracket in the area around the corner portion 35 constituted by the side sill 30 and the rear side member 10 and the like, thereby reducing the size. It becomes possible.

  Furthermore, according to the present embodiment, the support shaft 50 of the trailing arm is brought as close as possible to the rear side member 10 by the inner recess 10a provided in the rear side member 10, and the second joining is performed at the vehicle vertical direction position of the support shaft 50. It is possible to transmit the load from the portion 22p from the outer member 22 to the inner member 21 via the support shaft 50 and to receive the load as a whole.

  Further, according to the present embodiment, the reinforcement 40 has a bent shape formed by the vertical walls 41 and 43 and the horizontal plane portion 42, so that the jack-up load has an effect of improving rigidity due to the bent shape at the portion of the side sill 30. Moreover, it becomes possible to form the fixing hole 45 for conveyance for hook and convex member insertion in the horizontal surface part 42. FIG.

  The description of the above embodiment is an example for explaining the present invention, and does not limit the invention described in the claims. Moreover, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim.

  For example, in the present embodiment, the three-layered state is configured such that the side sill 30 is sandwiched between the reinforcement 40 and the rear side member 10 or the trailing arm bracket 20, but is not limited thereto. The side sill 30, the reinforcement 40, and the trailing arm bracket 20 may be stacked in this order from the outside in the vehicle width direction to the inside. Similarly, the side sill 30, the reinforcement 40, and the rear side member 10 may be used in this order. In addition, the joining in the said embodiment also includes the state in which members which are not in direct contact are indirectly connected.

  Moreover, in this embodiment, although the 1st junction part 10p and the 2nd junction part 22p each comprise the joining state of 3 sheets, it is not restricted to this. For example, the three-layered joining may be only the first joining portion 10p to which the rear side member 10, the side sill 30, and the reinforcement 40 are joined.

10 Rear side member 10a Inner recess 10p First joint 11 Floor side member 13 Cross member 15 Side member joint member 18 Floor panel 20 Trailing arm bracket 21 Inner member 21a Inner flat portion 21b Shaft insertion hole 22 Outer member 22a Outer flat portion 22b Shaft insertion hole 22c Side sill contact portion 22p Second joint portion 30 Side sill 31 Flange portion 32 Flat portion 33 Side surface portion 35 Corner portion 40 Reinforce 41 Outer vertical wall 42 Horizontal plane portion 43 Inner vertical wall 45 Transport fixing hole 50 Support shaft

Claims (4)

In the peripheral structure of the trailing arm bracket configured such that the trailing arm bracket that pivotally supports the base end portion of the trailing arm is supported by the side member and the side sill on the vehicle side,
The side sill is provided with a jack-up reinforcement,
The reinforcement, the side sill, and the side member are joined in a three-layered state,
The trailing arm bracket includes an inner member and an outer member arranged on the outer side in the vehicle width direction than the inner member.
The vehicle lower portion of the side sill and the side member form a corner around the portion overlapping each other in the vehicle width direction view,
The outer member is formed to have a triangular shape that fits the corner as viewed in the vehicle width direction,
The reinforcement, the side sill, and the trailing arm bracket are joined in a three-layered state,
The three-layered joint including the trailing arm bracket is disposed below the side member of the vehicle,
The peripheral structure of the trailing arm bracket, wherein the three-layer joint including the side member is disposed adjacent to the corner. The side member is provided with a recess recessed upward in the vehicle between the outer member and the inner member in the vehicle width direction.
A support shaft that supports the trailing arm is arranged to connect the outer member and the inner member in a state of straddling the recess,
The position of the support shaft in the vehicle vertical direction is arranged to be substantially the same as the vehicle vertical direction position of the three-layer overlapping joint including the trailing arm bracket, and the reinforcement and the support shaft are The peripheral structure of the trailing arm bracket according to claim 1, wherein the trailing arm bracket is arranged so as to overlap in a vehicle width direction view. In the peripheral structure of the trailing arm bracket configured such that the trailing arm bracket that pivotally supports the base end portion of the trailing arm is supported by the side member and the side sill on the vehicle side,
The side sill is provided with a jack-up reinforcement,
The reinforcement, the side sill, and the side member are joined in a three-layered state,
The reinforcement includes a horizontal plane part, an outer vertical wall extending from the outer side in the vehicle width direction of the horizontal plane part to the vehicle lower side, and an inner vertical wall extending from the inner side of the horizontal plane part in the vehicle width direction to the upper side of the vehicle. The peripheral structure of the trailing arm bracket. In the vicinity of the three-layer joint including the side member,
The peripheral structure of the trailing arm bracket according to claim 3 , wherein the reinforcement, the side sill, and the trailing arm bracket are joined together in a three-layered state.

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