CN105164003B - Trailing arm installation portion structure - Google Patents

Abstract

Trailing arm installation portion structure is provided, high rigidity can be obtained in trailing arm installation site while suppressing car weight to increase with cost increase using the structure.Trailing arm installation portion structure (installation portion structure (100)) according to the present invention is configured to include longeron (110), body sill (120) and support (130).The lower surface of longeron is located higher than the position of the lower surface of body sill.Installation portion structure also include strengthen component (140), strengthen component be installed on support vehicle interior side surface, extend to from the lower surface of longeron body sill lower surface and link longeron lower surface and body sill lower surface.Strengthening component includes planar portions (142), when observing from vehicle front, the planar portions have the region that the line segment or arc of the lower end in the vertical face of the inner side on the end of inner side and the vehicle-width direction of body sill on the vehicle-width direction by the lower surface in the vertical face and longitudinal beam connected of the inner side on the lower surface of longeron, the vehicle-width direction of body sill are surrounded.

Description

Trailing arm installation structure

technical field

The present invention relates to a trailing arm mount structure for swingably mounting a trailing arm of a torsion beam type rear suspension at the rear of a vehicle to a vehicle.

Background technique

A torsion beam rear suspension is a form of vehicle suspension. In a torsion beam type rear suspension, trailing arms are arranged on the left and right sides of a torsion beam (also referred to as a "cross beam") extending in the vehicle width direction under the floor of the rear of the vehicle . A torsion beam type rear suspension is swingably supported by the vehicle rear by attaching a trailing arm to the vehicle rear (for example, see Patent Document 1).

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2010-111154

Contents of the invention

The problem to be solved by the invention

In a vehicle, the bending and twisting loads acting from the torsion beam to the trailing arm mounting location are greater than the loads acting elsewhere. Therefore, high rigidity is required at the trailing arm installation position in order to ensure operational stability and NVH (Noise, Vibration, and Harshness). Additionally, since vibrations are transmitted from the rear tires to the trailing arms during road travel, bushings are built into the trailing arms for shock absorption. In order for the bushing to function effectively, high rigidity is locally required at the trailing arm mounting location.

With the method of providing a reinforcing member (reinforcement) at the trailing arm mounting position as in Patent Document 1, the rigidity at the mounting position is improved. However, since the reinforcement member described in Patent Document 1 is a member obtained only by bending a plate-shaped member, it is unlikely to obtain high rigidity of the reinforcement member itself, and it is also unlikely to obtain a high trailing arm installation position. rigidity. Furthermore, with the configuration in which the reinforcing member is respectively joined to the longitudinal surface of the inner side support wall and the longitudinal surface of the rear frame, there is a possibility that the rigidity against the load in the vehicle width direction is insufficient.

As a method of further improving the rigidity at the trailing arm attachment position in the structure described in Patent Document 1, a reinforcement member may be newly added near the attachment position. However, this method leads to an increase in vehicle weight and cost due to the addition of new components, although the rigidity at the trailing arm installation position is improved. Increasing the thickness of the members to be used at the trailing arm mounting location can increase rigidity, but also results in increased weight and cost.

The present invention has been made in view of these problems, and an object of the present invention is to provide a trailing arm mounting portion structure by which high rigidity.

solutions to problems

In order to solve the above-mentioned problems, a trailing arm mount structure having a typical configuration according to the present invention is a trailing arm mount structure for swingably mounting a trailing arm of a torsion beam type rear suspension at the rear of a vehicle to a vehicle, which The trailing arm mounting portion structure includes: a side member disposed below a rear floor panel constituting a floor at the rear of the vehicle and extending in the vehicle front-rear direction; a body sill extending in the vehicle front-rear direction on the vehicle outer side of the side member; and a bracket extending downward from the lower surface of the side member along the longitudinal surface of the inner side in the vehicle width direction of the door sill and mounted to the side member near the rear end of the door sill to serve as the trailer The bolt of the swing shaft of the arm passes through the bracket to support the trailing arm, wherein the lower surface of the longitudinal beam is located at a position higher than the lower surface of the vehicle body sill, and the trailing arm mounting part structure further includes a reinforcing member , the reinforcement member is installed on the surface of the vehicle inner side of the bracket, the reinforcement member extends from the lower surface of the side beam to the lower surface of the side sill, the reinforcement member connects the lower surface of the side beam and the lower surface of the rocker, and the reinforcing member includes a planar portion having, when viewed from the front of the vehicle, a A longitudinal surface and a region surrounded by a line segment or an arc connecting an inner end portion of the lower surface of the side member in the vehicle width direction to a lower end of the inner longitudinal surface of the rocker in the vehicle width direction.

With the above configuration, the reinforcement member is attached to the side members and the body sills as vehicle body structural members in addition to the bracket, so that the load acting on the bracket can be advantageously distributed to the entire vehicle body. This can improve the reinforcing effect and suppress deformation of the stent. That is, the rigidity at the trailing arm attachment position can be improved. In particular, in the above configuration, the reinforcement member is mounted to the bracket in the vehicle height direction and to the side members and the body sill in the vehicle width direction. This can improve rigidity against loads in the vehicle width direction.

Also, in the above configuration, the reinforcement member includes a planar portion in addition to the surface extending from the lower surface of the side member along the longitudinal surface on the inside of the bracket in the vehicle width direction. Thereby, the reinforcing member has a three-dimensional shape, and thus can provide higher rigidity against a load than a conventional simple plate-shaped member. In this way, in the above configuration, the above effect can be obtained due to the joint position of the reinforcement member and the shape change (addition of the planar portion) of the reinforcement member. Therefore, it is possible to obtain high rigidity at the trailing arm mounting position while suppressing an increase in vehicle weight and cost.

Preferably, a support point in the reinforcing member that supports the bolt is located in the region when viewed from the front of the vehicle. According to this configuration, the bolt support point is located in the area reinforced by the flat portion when viewed from the front of the vehicle. This can improve the rigidity near the bolt support point where the load applied by the trailing arm is most concentrated in the bracket, and can suppress deformation due to the load.

Preferably, when viewed from the front of the vehicle, a support point of the reinforcing member that supports the bolt is located at a vehicle connecting an end portion on the inner side in the vehicle width direction of the lower surface of the side member and the vehicle body sill. On the line segment at the lower end of the vertical surface on the inner side in the width direction. This can most effectively distribute the load acting on the bolt support point in the bracket to the side members and the rocker, and therefore, the stress acting on the bracket can be reduced and deformation of the bracket can be suppressed.

The effect of the invention

An object of the present invention is to provide a trailing arm mounting portion structure by which high rigidity can be obtained at a trailing arm mounting position while suppressing an increase in vehicle weight and cost.

Description of drawings

FIG. 1 is an overall perspective view of a vehicle including a trailing arm mounting portion structure according to the present embodiment.

FIG. 2 is an overall perspective view of the vehicle shown in FIG. 1 viewed from below.

FIG. 3 is an enlarged view within the dotted circle shown in FIG. 2 .

FIG. 4 is a diagram showing a state in which the reinforcing member shown in FIG. 3 is viewed from direction A. FIG.

FIG. 5 is a cross-sectional view taken along line B-B in FIG. 3 .

FIG. 6 is a diagram showing a state in which the reinforcing member shown in FIG. 3 is viewed from a direction G. FIG.

FIG. 7 is a diagram showing a state in which the reinforcing member shown in FIG. 3 is viewed from a direction H. FIG.

Explanation of reference signs

100...installation structure; 100a...vehicle; 102...rear floor panel; 104...torsion beam; 106a...trailing arm; 106b...trailing arm; 110...longitudinal beam; ;120b...longitudinal surface; 130...bracket; 140...reinforcing member; 142...plane part; 144...lower surface part; 146...wall surface; 148...bulging part; 160...bolt

detailed description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Dimensions, materials, and other specific numerical values described in this embodiment are merely examples for facilitating understanding of the present invention, and are not to be construed as limiting the present invention unless otherwise stated. It should be noted that, in this specification and the drawings, elements that have substantially the same function and configuration are denoted by the same reference numerals, and repeated explanation thereof has been omitted. In addition, illustration of elements not directly related to the present invention has been omitted.

1 is an overall perspective view of a vehicle 100a including a trailing arm mount structure (hereinafter simply referred to as "mount structure 100") according to the present embodiment, and shows a state of the vehicle 100a viewed from the left side. FIG. 2 is an overall perspective view of the vehicle 100a shown in FIG. 1 viewed from below.

As shown in FIG. 1 , a vehicle 100a is provided with a rear floor panel 102 constituting the floor of the rear of the vehicle. As shown in FIG. 2 , a rear floor side member (hereinafter referred to as “sider 110 ”), which is a side member extending in the front-rear direction of the vehicle, is arranged below the rear floor panel 102 .

In this embodiment, the rear wheels (not shown) of the vehicle 100a are supported by a torsion beam type rear suspension. Specifically, in this torsion beam type rear suspension, as shown in FIG. 2 , trailing arms 106 a and 106 b supporting rear wheels are arranged at both ends of a torsion beam 104 extending in the vehicle width direction. Trailing arms 106a and 106b are swingably mounted to the vehicle. The mounting part structure 100 of this embodiment is a structure for mounting the trailing arms 106a and 106b to the vehicle 100a.

FIG. 3 is an enlarged view within the dotted circle shown in FIG. 2 , and shows a state in which the dotted circle shown in FIG. 2 is viewed from the vehicle underside. FIG. 4 is a diagram showing a state in which the reinforcing member 140 shown in FIG. 3 is viewed from direction A. Referring to FIG. FIG. 5 is a cross-sectional view taken along line B-B in FIG. 3 , and shows a state in which a part of the reinforcement member 140 is seen through for ease of understanding.

As shown in FIG. 3 , a body sill 120 extending in the vehicle front-rear direction is arranged on the vehicle outer side of the side member 110 . As shown in FIG. 5 , in the present embodiment, the lower surface 110 a of the side member 110 is arranged above the lower surface 120 a of the rocker 120 . In this embodiment, although not shown, a suspension mounting bush (not shown) is arranged between the side member 110 and the rocker 120 , and by clamping the bushing between the rocker 120 and the rear The mounting bushing is fixed to the vehicle body between the aforementioned brackets 130 .

As shown in FIG. 4 , the bracket 130 is arranged on the vehicle inner side of the body sill 120 , below the longitudinal beam 110 , and the bolt 160 (see FIG. 5 ), which is the swing axis of the trailing arm 106 a (see FIG. 1 ), passes through the bracket 130 to support the trailing arm 106 a (see FIG. 1 ). arm 106a. As shown in FIGS. 4 and 5 , the bracket 130 extends downward from the lower surface 110 a of the side member 110 along the longitudinal surface 120 b on the inner side of the rocker 120 in the vehicle width direction, and is mounted on the rear end of the rocker 120 near the rear end. Stringer 110.

In addition, as shown in FIG. 3 , the mount structure 100 of the present embodiment is configured to further include a reinforcing member 140 for reinforcing the bracket 130 (see FIGS. 4 and 5 ). As shown in FIG. 4 , the reinforcing member 140 is attached to the surface of the bracket 130 on the inner side of the vehicle, extends from the lower surface 110 a of the side member 110 to the lower surface 120 a of the rocker 120 , and is connected to the lower surface 110 a and the lower surface 120 a. That is, in the mounting part structure 100 of this embodiment, the bracket 130 , the side member 110 , and the rocker 120 are connected by the reinforcing member 140 .

By connecting the bracket 130, the side member 110, and the rocker 120 with the reinforcing member 140 as in the above configuration, the load acting on the bracket 130 from the trailing arms 106a and 106b via the bolt 160 (see FIG. Side members 110 and body sills 120 of vehicle body structural members. This can improve the reinforcing effect of the bracket 130, and can prevent the bracket 130 from being deformed due to these loads. That is, the rigidity of the trailing arm attachment portion structure can be improved.

In addition, as shown in FIG. 4 , in the present embodiment, the reinforcing member 140 is attached to the surface of the bracket 130 on the vehicle inner side in the vehicle height direction, and is attached to the lower surface 110 a of the side member 110 and the rocker 120 in the vehicle width direction. The lower surface 120a. This can improve rigidity against loads in the vehicle width direction.

In addition, the present embodiment is characterized in that the reinforcing member 140 includes a planar portion 142 as shown in FIG. 4 . As shown in FIG. 5 , the planar portion 142 (see FIG. 4 ) has a vertical surface (line segment D) formed by the lower surface 110 a (line segment C) of the side member 110 and the inner side in the vehicle width direction of the side sill 120 when viewed from the front of the vehicle. A region surrounded by an arc E connecting an inner end P1 in the vehicle width direction of the lower surface 110 a of the side member 110 and a lower end P2 of the inner longitudinal surface of the rocker 120 in the vehicle width direction. Thus, the reinforcing member 140 has a three-dimensional shape including a flat surface portion 142 and a lower surface portion 144 (see FIG. 7 ) that is inward in the vehicle width direction of the bracket 130 from the lower surface 110 a of the side member 110 . A surface that extends longitudinally. Therefore, the reinforcing member 140 can provide higher rigidity with respect to a load than a conventional simple plate-shaped member, and the reinforcing member 140 can exhibit a higher reinforcing effect.

It should be noted that although a configuration in which P1 and P2 are connected by an arc E is exemplified in the present embodiment, it is not limited thereto, and P1 and P2 may be connected by a straight line segment F. In this case, the area surrounded by line segment C, line segment D, and line segment F has an approximately triangular shape, whereas the area surrounded by line segment C, line segment D, and arc E has an approximately fan-shaped shape in the present embodiment.

In particular, in the present embodiment, the end portion of the arc E of the reinforcement member is arranged such that the arc E connects the end portion P1 (ridge line) on the inner side in the vehicle width direction of the lower surface 110 a of the side member 110 and the rocker 120 The lower end P2 of the longitudinal surface on the inner side in the vehicle width direction. The ends P1 and P2 are curved portions between the two surfaces of each member and thus have high rigidity. Therefore, arranging the ends of the arc of the reinforcement member 140 at the ends P1 and P2 as in the present embodiment can suppress deformation of the reinforcement member 140 more favorably.

As described above, in the mounting portion structure 100 of the present embodiment, connecting the bracket 130 , the side member 110 , and the rocker 120 via the reinforcing member 140 can advantageously distribute the load applied by the trailing arms 106 a and 106 b. Furthermore, providing the planar portion 142 in the reinforcement member 140 can suppress deformation of the reinforcement member 140 and improve reinforcement effect. Therefore, it is possible to obtain high rigidity at the installation positions of the trailing arms 106a and 106b due to the engagement position of the reinforcement member 140 and the shape change of the reinforcement member 140 while suppressing an increase in vehicle weight and an increase in cost.

In addition, in the present embodiment, as shown in FIG. 5 , the support point P3 of the bolt 160 in the reinforcement member 140 is located in the area where the planar portion 142 is provided (in the area surrounded by dotted lines) when viewed from the vehicle front. Thus, the support point P3 of the bolt 160 is located in the area reinforced by the planar portion 142 when viewed from the front of the vehicle. Therefore, the rigidity near the support point P3 of the bolt 160 can be improved, and the deformation of the position where the load applied by the trailing arms 106 a and 106 b concentrates on the bracket 130 can be advantageously prevented.

In addition, in the present embodiment, as shown in FIG. 5 , when viewed from the front of the vehicle, the support point P3 of the bolt 160 in the reinforcement member 140 is located at the inner end of the lower surface 110 a of the connection side member 110 in the vehicle width direction. P1 and the line segment F of the lower end P2 of the inner vertical surface of the rocker 120 in the vehicle width direction. This can most effectively distribute the load acting on the support point P3 of the bolt 160 in the reinforcement member 140 to the side members 110 and the rocker 120 . Therefore, stress acting on the reinforcing member 140 and further on the bracket 130 can be reduced, and deformation from the support point P3 of the bolt 160 can be more effectively suppressed.

6 is a diagram illustrating a state in which the reinforcement member 140 illustrated in FIG. 3 is viewed from a direction G, and FIG. 7 is a diagram illustrating a state in which the reinforcement member 140 illustrated in FIG. 3 is viewed from a direction H. Referring to FIG. As shown in FIG. 3 and FIG. 6 , in the mounting part structure 100 of the present embodiment, the reinforcement member 140 is provided with a lower surface part 144 having a flange shape extending from the arc E of the stringer (connecting stringer). The arc of the inner end P1 of the lower surface in the vehicle width direction and the lower end P2 of the inner longitudinal surface of the rocker 120 in the vehicle width direction: see FIG. 5 ) extends in the vehicle front-rear direction. This can increase the rigidity of the reinforcing member 140 without increasing the thickness, thereby being able to contribute to reduction in vehicle weight.

In addition, as shown in FIGS. 3 and 7 , in the mounting portion structure 100 of the present embodiment, a bulging portion 148 is provided below the support point P3 of the bolt 160 (see FIG. 5 ), and the bulging portion 148 extends along the width of the vehicle. The direction bulges and connects the planar portion 142 and the wall portion 146 provided on the vehicle rear side of the planar portion 142 . The planar part 142 and the wall part 146 provided in pairs in the vehicle front-rear direction are connected by the bulging part 148, so that the rigidity against the load acting on the reinforcement member 140 from the trailing arms 106a and 106b in the vehicle front-rear direction can be improved. Therefore, deformation of the reinforcing member 140 can be effectively suppressed, and deformation of the vehicle body can be effectively suppressed.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it should be understood that the present invention is not limited to the above-described embodiments. Those skilled in the art will understand that various modifications and changes can be made within the scope of the invention defined by the claims, and should be construed as being included in the technical scope of the present invention.

Industrial availability

The present invention can be applied to a trailing arm mount structure for swingably mounting a trailing arm of a torsion beam type rear suspension at the rear of a vehicle to a vehicle.

Claims (3)

1. A trailing arm mounting part structure for mounting a trailing arm of a torsion beam type rear suspension at the rear of a vehicle to a vehicle and being swingable, The structure of the trailing arm installation part is characterized in that the structure of the trailing arm installation part comprises: a side member disposed below a rear floor panel constituting a floor at the rear of the vehicle and extending in the vehicle front-rear direction; a body sill extending in a vehicle front-to-rear direction on a vehicle outer side of the side member; and a bracket extending downward from the lower surface of the side member along the longitudinal surface of the inner side in the vehicle width direction of the side sill and attached to the side member in the vicinity of the rear end of the side sill to serve as the trailing arm The swing shaft bolts pass through the bracket to support the trailing arm, Wherein, the lower surface of the longitudinal beam is located at a position higher than the lower surface of the vehicle body sill, The trailing arm mounting portion structure further includes a reinforcement member mounted on a vehicle inner surface of the bracket, the reinforcement member extending from a lower surface of the side member to a lower surface of the vehicle body sill, so that the reinforcing member joins the lower surface of the side member and the lower surface of the rocker, and The reinforcing member includes a planar portion having, when viewed from the front of the vehicle, a lower surface consisting of a lower surface of the side member, a longitudinal surface on the inner side in the vehicle width direction of the rocker, and a lower surface connecting the side member. A region surrounded by a line segment or an arc of an inner end portion in the vehicle width direction of the vehicle body and a lower end of the inner longitudinal surface of the vehicle body rocker in the vehicle width direction. 2 . The trailing arm attachment structure according to claim 1 , wherein, when viewed from the front of the vehicle, a support point for supporting the bolt in the reinforcement member is located in the area. 3 . 3. The trailing arm installation part structure according to claim 1 or 2, characterized in that, when viewed from the front of the vehicle, the supporting point for supporting the bolt in the reinforcing member is located at the bottom of the connecting beam. On a line segment between an inner end portion of the surface in the vehicle width direction and a lower end of the inner longitudinal surface of the rocker in the vehicle width direction.