FR3076801A1 - FRONT PORTION OF VEHICLE STRUCTURE - Google Patents

Abstract

In a vehicle front end structure, an upper body is attached to a chassis frame through a body mount (40), and a body mount attachment portion (4) to secure the mount of body (40) is arranged on a lower part of the upper body. The body mount attachment portion (4) has a mounting mounting surface (41) having a mounting hole to which the body mount (40) is attached, a sidewall portion in the width direction of the mounting mounting surface (41) and extending in a vertical direction, and a vertical wall portion (43) located in a longitudinal direction of the mounting surface of the support (41) and extending in the vertical direction a spacer member (34) having a closed sectional shape and extending in the vertical direction is joined to the side wall portion, and a cross member (35) having a closed sectional shape and extending in the direction width is joined to the vertical wall portion (43). 2]

Description

Description

Title of the invention: FRONT OF VEHICLE STRUCTURE

Technical Field [0001] The present invention relates to a structure of the front part of a vehicle.

PRIOR ART In conventional vehicle front part structures, a structure is known in which a wing apron is arranged on each side of a front part of a body in an engine compartment part, a reinforcing element. side part constituting a closed section structure in collaboration with the wing apron is provided on an inner side part of the wing apron, and the front and rear end parts of the side part reinforcing element are connected to chassis frame via a body mount bracket (see Patent Document 1, for example).

Technical problem [0003] However, in the aforementioned conventional vehicle front part structure, the body of the engine compartment part and the chassis frame are only connected by the body mount support or a body mount element , and thus, the rigidity of a body mount fixing part cannot be improved easily and it is problematic that the vibration characteristics and the like of the front part of the vehicle cannot be improved.

In addition, in the structure of the front part of a conventional vehicle, since it is a structure in which the side part reinforcing element is provided on the inner side part of the wing apron, the improvement of the rigidity of the front part of the vehicle is limited; moreover, it is problematic that a side part reinforcing element is required, and an increase in the number of components and an increase in cost are caused.

The present invention was designed taking into account such circumstances and aims to provide a vehicle front part structure which can improve the rigidity of the upper part of the body and a body mount fixing part, to improve the vibration characteristics and the like of the front part of the vehicle, and effectively diffusing an action on the body mount on the front part of the vehicle.

Technical solution [0006] In order to achieve the aforementioned objective, a vehicle front part structure according to the present invention is, in a vehicle front part structure having a chassis frame and an upper body, the upper body being fixed on the chassis frame via a body mount, and a body mount fixing part for fixing the body mount being arranged on a lower part of the upper body, the body mount fixing part comprises a mounting surface having a mounting hole to which the body mounting is attached, a side wall portion located in a direction of the width of the vehicle on the mounting surface and extending in a vertical direction of the vehicle , a vertical wall portion located in a longitudinal direction of the vehicle from the mount attachment surface and extending in the vertical direction of the vehicle, and a cross member having a closed section shape and extending in the vertical direction of the vehicle is joined to the side wall portion, and a cross member having a closed section shape and extending in the width direction of the vehicle is attached to the vertical wall part.

Advantages provided [0007] According to the present invention, the rigidity of the upper body and of the body mount fixing part can be improved, the vibration characteristics and the like of the front part of the vehicle can be improved, and an action on the body mount can be effectively diffused to the front part of vehicle.

As described above, the vehicle front part structure according to the present invention has the chassis frame and the upper body, the upper body is fixed to the chassis frame by means of the body mount, the body frame fixing part for fixing the body frame is arranged on the lower part of the upper body, the body frame fixing part has the frame fixing surface having the fixing hole to which the body frame is fixed body, the side wall portion located in the width direction of the vehicle on the mounting surface and extending in the vertical direction of the vehicle, and the vertical wall portion located in the longitudinal direction of the vehicle from the surface for mounting the frame and extending in the vertical direction of the vehicle, the spacer element having the shape of a closed section and extending in the vertical direction vehicle wedge is joined to the side wall portion, and the cross member having the closed section shape and extending in the width direction of the vehicle is joined to the vertical wall portion.

Therefore, in the vehicle front part structure of the present invention, since the periphery of the body mount fixing part is surrounded by the wall part and the element having the shape of closed section, the rigidity of the front part of the vehicle and the body mount fixing part can be easily improved without using a separate reinforcing member, whereby the vibration characteristics and the like of the front part of the vehicle can be improved, and the cost of components can be reduced.

In addition, in the vehicle front part structure of the present invention, since the body mount fixing part and the vehicle front part are connected by the element having the shape of closed section, the action on the body mount can be effectively diffused to the front part of the vehicle, the concentration of stress on the body mount fixing part can be prevented and the durability can be improved.

Brief description of the drawings

Fig.l [fig.l] is a perspective view of a chassis frame and an upper part of the body on which a vehicle front part structure according to an embodiment of the present invention is put in operation, diagonally from the top and the front side of a vehicle;

Fig. 2 [Fig.2] is a sectional view of a front body mount fixing part located on a left side of the vehicle and its peripheral part in the vehicle front part of [Fig. 1], seen from above the vehicle;

Fig. 3 [fig.3] is a sectional view along line AA of [Fig. 2];

Fig. 4 [fig.4] is a sectional view along line BB of [Fig. 2].

Description of the embodiments The present invention will be described below in detail on the basis of an illustrated embodiment.

Figures 1 to 4 illustrate a structure of the front part of a vehicle according to the embodiment of the present invention. In the figures, a direction along an arrow Fr points towards a front of the vehicle, a direction along an arrow U points towards the upper part of the vehicle, a direction along an arrow X denotes a direction along the width of the vehicle and an arrow Y denotes a longitudinal direction of the vehicle. As illustrated in Figure 1, the front part of vehicle 1 on which the structure according to the embodiment of the present invention is implemented mainly has a chassis frame 2 extending along a longitudinal direction of the vehicle and provided both on the right and left sides in a direction along the width of the vehicle in a lower part of an assembly space of the engine group S, and, an upper body 3 provided on an upper part of the space of mounting of the power unit S, the upper body 3 being fixed to the chassis frame 2 through a body mount 40. Thus, on the lower part of the upper body 3, a body mount fixing part 4 is arranged to fix the body mount 40.

The upper body 3 consists of a side apron member 31 and a wing apron panel 32 provided on each of the right and left sides in the direction of the width of the vehicle from the front part of the vehicle 1, a hood locking element 33 provided on a vehicle front side of the vehicle front part 1, a spacer element 34 and a cross member 35, a dashboard 36 and a dashboard side panel 37 provided on a vehicle rear side of the vehicle front part 1, and the like.

The hood locking element 33 and the cross member 35 extend in the direction of the width of the vehicle, and the hood locking member 33 is arranged in a position located above the cross member 35 and parallel to the cross-member 35. The hood locking element 33 is located on each of the right and left sides in the direction of the width of the vehicle and is fixed to an upper end part of the spacer element 34 s' extending in the vertical direction of the vehicle, and is made to stretch between the spacer members 34 on the right and left sides. As a result, since the front body mount fixing parts 41A right and left, which will be described later, are connected, the rigidity of the body frame fixing part 4 is further improved.

The body mount fixing part 4 of this embodiment is constituted by including a pair of right and left front body mount fixing parts 4 arranged on the vehicle front side of the upper body 3 and a pair of rear body mount attachment parts 4B right and left arranged on the vehicle rear side of the upper body 3, respectively. In the vehicle front part structure of this embodiment, the front body mount fixing part 4A on the left side of the vehicle in the pair of front body mount fixing parts 4A right and left will be described, but since the front body mount fixing part 4A on the right side of the vehicle is made up of a similar structure, its description will be omitted.

As illustrated in Figures 2 to 4, the front body mount fixing part 4A has a fixing hole 41a to which the body mount 40 is fixed by a fixing tool 5 such as a long bolt or the like and has a mount attachment surface 41 having a substantially square shape in plan view, a side wall portion 42 located on the right and left sides in the vehicle width direction of the mount attachment surface 41 and s' extending in the vertical direction of the vehicle, and a vertical wall portion 43 located on both front and rear sides in the longitudinal direction of the vehicle from the mount attachment surface 41 and extending in the vertical direction of the vehicle. In addition, the upper ends of the side wall portion 42 and the vertical wall portion 43 are formed so as to be located in higher positions than the upper portion of the body mount 40 in a state in which the mount body 40 is fixed to the fixing hole 41a of the mount fixing surface 41. That is to say that the periphery of the body mount 40 is surrounded by the right and left side wall parts 42 and the parts front and rear vertical wall 43 in the state fixed to the fixing hole 41a of the frame fixing surface 41.

On an inner side wall part 42a on the interior side of the vehicle (central side of the vehicle), the spacer element 34 having a closed section shape and extending in the vertical direction of the vehicle is joined, and on the vertical wall portion 43a on the front side of the vehicle, the cross member 35 having the closed section shape and extending in the width direction of the vehicle is joined. In addition, the spacer element 34 and the cross member 35 are joined to one another. Consequently, since the body mounts 40 are connected to the elements having the closed section shapes and extending in different directions, and the elements having the closed section shapes are joined together, the frame fixing part 4A body is formed so as to be able to have a structure with higher rigidity.

The side wall portion 42 of this embodiment is, as illustrated in Figures 2 to 4, constituted by the inner side wall portion 42a located on the inner side in the direction of the width of the vehicle and a wall portion external lateral 42b situated on the external side in the direction of the width of the vehicle with respect to the fixing hole 41a of the mounting fixing surface 41. The spacer element 34 having the closed section shape is joined to the wall part inner side 42a and the side apron member 31 having the closed section shape and extending in the longitudinal direction of the vehicle is joined to the outer side wall portion 42b. Accordingly, the spacer member 34 having the closed section shape is provided on the inner side wall portion 42a and the apron side member 31 having the closed section shape is provided on the outer side wall portion 42b by relative to the fixing hole 41a of the mount fixing surface 41, whereby the rigidity of the body mount fixing part 4A is further improved.

In addition, the cross 35 in this embodiment is, as illustrated in Figures 2 to 4, arranged on the vehicle side of the fixing hole 41a of the mounting surface 41, and a rear surface 35a of the cross member 35 and an inner surface 31a of the side member of the deck 31 are connected by a side frame member 6. That is to say that the side frame member 6 forms, as illustrated in Figures 2 and 4, a closed section shape located continuously against both the cross member 35 and the side apron member 31 between the cross member 35 having the closed section shape and the side apron member 31 having the closed section shape . Thus, the side frame element 6 has a substantially hat-shaped section and the upper and lower flange parts 6a and 6b are joined to the external side wall part 42b and is connected to a rear surface 35a of the cross-member 35 and to an inner surface 31a of the side apron member 31 via the outer side wall portion 42b. Consequently, the closed-section structural bodies, that is to say the cross-member 35 and the side panel member 31, are connected by the side mounting element 6 forming the closed-section shape, the stiffness the effort of the joining part is ensured, and the rigidity of the front body mount fixing part 4A can be further improved.

Therefore, in the vehicle front part structure 1 according to this embodiment, the closed section extends in the longitudinal direction of the vehicle, in the direction of the width of the vehicle and in the vertical direction of the vehicle from the front body mount fixing part 4A as a center, and the periphery of the front body mount fixing part 4A is surrounded by the part having a closed section shape.

In the structure of the front part of the vehicle 1 according to this embodiment, as illustrated in FIG. 2, an outer end part 35b of the cross-member 35 in the direction of the width of the vehicle is located closer to the vehicle interior side by a simple distance L than an outer end portion 4Aa from the front body mount attachment portion 4A in the width direction of the vehicle. And a front surface 35c of the cross-member 35 has an inclined surface 35d on the rear of the vehicle in its extent from the central part of the vehicle to the exterior side of the vehicle. Consequently, the outer end portion 35b of the crossmember 35 is located closer to the interior side of the vehicle than the outer end portion 4Aa of the front body mount fixing portion 4A, and space is provided on the outer side of the cross member 35. In addition, a sectional area of the closed section shape of the outer end portion 35b in the cross member 35 is formed thin by the inclined surface 35d, whereby a space which is a buffer space is provided at the front of the vehicle and an impact energy in the structure of the section with closed section in the event of a collision with a pedestrian is reduced.

The embodiment of the present invention has been described, but the present invention is not limited to the embodiment described above but is subject to various modifications and changes based on the technical idea of the present invention.

List of reference signs [0027] - 1 front part of the vehicle [0028] - 2 chassis frame [0029] - 3 upper body [0030] - 4 part for fixing the body mount [0031] - 4A part for fixing the front body mount [0032] - 5 fixing tool [0033] - 6 side frame element [0034] - 31 side apron element [0035] - 34 spacer element [0036] - 35 cross member [0037] - 40 frame body [0038] - 41 frame fixing surface [0039] - 41a fixing hole [0040] - 42 side wall part [0041] - 42a inner side wall part [0042] - 42b outer side wall part - 43 part of vertical wall [0044] - 43a part of vertical wall on the front side of the vehicle [0045] - S mounting space of the engine group

List of documents cited

Patent documents For all practical purposes, the following patent document is cited:

- Patent document 1: JP H07-267135 A.

Claims (1)

[Claim 1] [Claim 2] [Claim 3] [Claim 4] claims A vehicle front part structure having a chassis frame and an upper body, the upper body being fixed to the chassis frame via a body mount (40); and a body mount fixing part (4) for fixing the body mount (40) being arranged on a lower part of the upper body, characterized in that the body mount fixing part (4) comprises a surface for mount attachment (41) having a mounting hole (41a) to which the body mount (40) is attached, a side wall portion located in a vehicle width direction on the mount attachment surface (41) and extending in a vertical direction of the vehicle, and a vertical wall portion located in a longitudinal direction of the vehicle from the mount fixing surface (41) and extending in the vertical direction of the vehicle; and a spacer member (34) having a closed section shape and extending in the vertical direction of the vehicle is joined to the side wall portion (42), and a cross member (35) having a closed section shape and s extending in the width direction of the vehicle is joined to the vertical wall portion (43). The vehicle front part structure according to claim 1, wherein the spacer member (34) and the cross member (35) are joined to each other. The vehicle front part structure according to claim 1, wherein the side wall part (42) is constituted by an inner side wall part (42a) located on an inner side in the width direction of the vehicle and by a outer side wall portion (42b) located on an outer side in the direction of the width of the vehicle with respect to the fixing hole (41a) located on the frame fixing surface (41); and the spacer member (34) is joined to the inner side wall portion (42a), and a side apron member (31) having a closed section shape and extending in a longitudinal direction of the vehicle is joined to the outer side wall portion (42b). The vehicle front part structure according to any of claims 9 to 7, in which claims 1 to 3, in which the cross member (35) is arranged on a vehicle front side of the mounting hole (41a) on the mounting surface frame (41) and a rear surface of the crossmember (35) and an inner surface of the side apron member (31) are connected by a side frame member (6); and the side frame element (6) forms a closed section shape located continuously against both the cross member (35) and the side apron member (31) between the cross member (35) having the section shape closed and the side member of the deck (31) having the shape of a closed section. The vehicle front part structure according to any of claims 1 to 4, wherein the outer end portion in the vehicle width direction of the cross member (35) is located closer to the interior side of the vehicle than the outer end portion in the vehicle width direction of the body mount fixing portion (4); and a front surface of the crossmember (35) has an inclined surface on a rear of a vehicle extending from a central part of the vehicle to the outside of the vehicle.