JP5070010B2 - Chassis frame structure for vehicles - Google Patents

Description

  The present invention relates to a chassis frame structure for a vehicle in which a side member and a cross member are assembled via a fastening member.

  A conventional chassis frame structure for a vehicle generally uses a side member and a cross member and fastens them using rivets (rivet fastening structure chassis frame). There are two types of rivet fastening structures for side members and cross members depending on the position of the fastening surface.

  One is a flange fastening type such as the vehicle chassis frame structure 51 shown in FIG. 5 and the vehicle chassis frame structure 61 shown in FIG. The chassis frame structure 51 is obtained by attaching the end of the cross member 53 to the flange surface of the side member 52 and rivet-fastening the upper and lower surfaces of the side member 52.

  Further, the chassis frame structure 61 is obtained by attaching the end portion of the cross member 63 to the flange surface of the side member 52 via a mountain-shaped gusset 62 and rivet-fastening the upper and lower surfaces of the side member 52.

  The other is a web fastening type such as the vehicle chassis frame structure 71 shown in FIG. 7 and the vehicle chassis frame structure 81 shown in FIG. The chassis frame structure 71 is obtained by attaching the end portion of the cross member 73 to the web surface of the side member 52 and rivet-fastening it to the side surface of the side member 52.

  The chassis frame structure 81 is obtained by attaching the end of the cross member 63 to the web surface of the side member 52 via a chevron gusset 82 and rivet-fastening it to the side surface of the side member 52.

  The prior art document information related to the invention of this application includes the following.

JP-A-11-34914 JP 11-78961 A JP 11-78962 A

  However, the above-described conventional chassis frame structures for vehicles have the following drawbacks.

  In the flange fastening type, 1) The wharf of the fastening member is scattered on the upper surface of the side member, which becomes an obstacle when mounting. 2) When bending or torsion is applied to the frame, the flange portion is the largest in displacement and stress is likely to concentrate, so that strength problems such as broken rivets are likely to occur.

  In the web fastening, 3) the wharves are scattered on the side surface of the side member, which becomes an obstacle during the installation. 4) When the torsional input is applied to the frame, the torsional rigidity is lower than the flange fastening structure because the frame is fastened to the web surface with a small displacement. 5) Many holes used in the vehicle are opened on the side surface of the side member, so that it is difficult to discriminate the cross member fastening hole, and misassembly is likely to occur during frame assembly.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle chassis frame structure that overcomes the drawbacks of flange fastening and web fastening, compared to a vehicle chassis frame structure that requires both high durability and torsional rigidity. .

  Another object of the present invention is to prevent the head from projecting to the mounting surface side with respect to the head of the fastening member that interferes when mounting a loading platform or specially mounted body on the chassis portion of the vehicle. The object is to provide a chassis frame structure for a vehicle that is easy to wear.

The present invention has been devised to achieve the above object, and the invention of claim 1 is characterized in that a cross member is inserted into a groove of a side member having a web and a flange via a reinforcing plate so as to be formed in a U-shaped cross section. In the vehicle chassis frame structure in which the reinforcing plate and the cross member are connected to each other via a fastening member, the corner portion is chamfered at the corner portion where the web and the flange of the side member intersect. In this way, the inclined surface portion is formed by bending , and the reinforcing plate is formed in a mountain shape so as to extend from one end portion on the cross member side to the other end portion on the side member side, and the other end portion is bent and the inclined portion is formed. forming a reinforcing side inclined surface portion to be overlaid with surface, superimposing the reinforcement side inclined surface and the inclined surface portion, said side members and said provided the fastening member on the inclined surface portion A chassis frame structure for a vehicle entered into mutually reinforcing plate Rosumenba.

  The invention according to claim 2 is the vehicle chassis frame structure according to claim 1, wherein the inclined surface portion is formed such that the fastening member is located inside the outer surface of the web and inside the outer surface of the flange. .

According to a third aspect of the present invention, there is provided the vehicle according to the first or second aspect, wherein an extension portion is formed on the reinforcing plate so as to overlap the web of the side member, and the extension portion and the web are further fastened by a fastening member. This is a chassis frame structure.

According to a fourth aspect of the present invention, the two side members are arranged in parallel, the cross member is formed in a U-shaped cross section having a web and a flange, and the cross member crosses between the two side members in parallel. The vehicle according to any one of claims 1 to 3, wherein a plurality of the side members are arranged at predetermined intervals along the longitudinal direction of the side member, and both end portions of the cross member and two side members in parallel are connected by a fastening member. This is a chassis frame structure.

  ADVANTAGE OF THE INVENTION According to this invention, durability and torsional rigidity are high, and the chassis frame structure for vehicles which a fastening member does not become obstructive at the time of mounting can be provided.

  Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. First, the overall configuration of the preferred first embodiment of the present invention will be described with reference to FIG.

  As shown in FIG. 2, the chassis frame structure 1 for a vehicle according to the first embodiment includes two parallel side members 2, 2 extending along the longitudinal direction of the side member 2, and these side members 2, 2. A plurality of cross members 3 arranged at a predetermined interval along the longitudinal direction of the vehicle so as to cross the space along the vehicle width direction.

  Vehicles include large vehicles such as trucks and buses, SUVs, RVs, passenger cars, and rail vehicles such as freight cars.

  The side member 2 is a groove member that includes a vertical web 2w and a flange 2f that extends vertically from the web 2w and has a U-shaped cross section. The two side members 2 and 2 are arranged in parallel so that the grooves face each other.

  The cross member 3 is also a groove member that includes a vertical web 3w and a flange 3f that extends laterally from the web 3w and has a U-shaped cross section. The plurality of cross members 3 are arranged so that the respective grooves face the same direction.

  In the following description, as the chassis frame structure 1 for a vehicle, both end portions of the cross member 3 are mounted in the groove of the side member 2 at a mounting angle substantially perpendicular to the longitudinal direction of the side member 2, and are fastened to each other. An example of a ladder frame connected through 4 will be described.

  FIG. 1A is a perspective view of a main part of a chassis frame structure for a vehicle according to a preferred first embodiment of the present invention, and FIG. 1B is a cross-sectional view for explaining the mounting range thereof. It is.

  As shown in FIGS. 1 (a) and 1 (b), the chassis frame structure 1 for a vehicle has an oblique surface at each upper and lower corner (corner) where the web 2w and the flange 2f of the side member 2 intersect. The inclined surface portions 5 and 5 are formed over the entire length of the side member 2, the fastening members 4 are provided on the inclined surface portions 5 and 5, and the side member 2 and the cross member 3 are fastened to each other.

  The side member 2 is formed by bending by pressing or the like so as to have a shape in which a U-shaped corner is chamfered in a cross-sectional view.

  As the fastening member 4, rivets, bolts, nuts, and the like may be used. In the present embodiment, a rivet is used as the fastening member 4.

  Each inclined surface portion 5 is formed so that the head of the fastening member 4 is inside the outer surface of the web 2w and inside the outer surface of the flange 2f (particularly, refer to FIG. 1B). In other words, the front surface and the back surface of each inclined surface portion 5 are formed in a size that allows the fastening member 4 to be attached, and the head of the fastening member 4 does not protrude from the outer surface of the web 2w or the outer surface of the flange 2f. Formed.

  Each inclined surface portion 5 is formed with a plurality of side-side fastening holes 5h for fastening cross members so as to penetrate the side members 2 in the thickness direction.

  Furthermore, in the chassis frame structure 1 for a vehicle, the side member 2 and the cross member 3 are connected via a reinforcing plate 6 such as a gusset. The reinforcing plate 6 is formed in a mountain shape in plan view so that one end is slightly wider than the width of the flange 3f of the cross member 3, the other end is wider than one end, and widens from one end to the other end. The The other end portion of the reinforcing plate 6 is a reinforcing side inclined surface portion 6 s that is overlapped with the inclined surface portion 5.

  In addition, a plurality of cross-side fastening holes 3h for fastening the reinforcing plate are formed in the upper and lower flanges 3f at both ends of the cross member 3 so as to penetrate the flange 3f in the thickness direction.

  A plurality of reinforcing side fastening holes 6hc for fastening cross members that overlap the cross side fastening holes 3h are formed at one end of the reinforcing plate 6 so as to penetrate the reinforcing plate 6 in the thickness direction. A plurality of reinforcing side fastening holes 6 hs for fastening side members that are overlapped with the side side fastening holes 5 h are formed at the other end of the reinforcing plate 6 so as to penetrate the reinforcing plate 6 in the thickness direction.

  The assembly of the vehicle chassis frame structure 1 is performed by first superimposing the cross-side fastening holes 3h and the reinforcing-side fastening holes 6hc, inserting the fastening members 4 through these holes, and fastening them (if the fastening members 4 are rivets). By tightening and fastening), one end of the reinforcing plate 6 is attached to the flange surface of the end of the cross member 3.

  Further, the side-side fastening hole 5h and the reinforcement-side fastening hole 6hs are overlapped, and after the fastening member 4 is inserted into these holes, the fastening plate 4 is fastened (clamped and fastened when the fastening member 4 is a rivet), whereby the reinforcing plate 6 Is attached to the inner surface of the inclined surface portion 5.

  Since the reinforcing plate 6 connects the upper and lower ends of the cross member 3 with the inclined portions 5 of the side member 2, four reinforcing plates 6 are used for one cross member 3. Conversely, the reinforcing plate 6 may be attached to the cross member 3 after being attached to the side member 2. Thereby, the chassis frame structure 1 for vehicles shown in FIG. 2 is obtained.

  On this chassis frame structure 1 for a vehicle, a bodywork (attachment for bodywork or frame-mounted part), a body surface F (see FIG. 1 (b)) within the body range R as shown in FIG. 1 (b). ) Is attached on the top)) as an example.

  That is, the bodywork is a plane from the upper surface 2u of the side member 2 (the flat inner surface Rf in contact with the web surface of the side member 2) to the upper end surface of the bodywork range R (in FIG. 1B, the horizontal plane in the horizontal direction). Or on a plane from the outer surface 2s of the side member 2 (flat inner surface Rw in contact with the flange surface of the side member 2) to the side end surface of the mounting range R (vertical surface in the vertical direction in FIG. 1B) Attached to a bodywork surface.

  When the bodywork is mounted on the chassis frame structure 1 for a vehicle, the head of the fastening member 4 (the pier when the fastening member 4 is a rivet, the bolt head when the fastening member 4 is a bolt and a nut) The inner surface Rf, the inner surface Rw, and the inclined surface outside the inclined surface portion 5 of the side member 2 are housed in a space S that is partitioned.

  For this reason, in the vehicle chassis frame structure 1, the head of the fastening member 4 does not protrude from the upper surface 2 u of the side member 2 or from the outer surface 2 s, so that it can be mounted by the mounting range R as compared with the conventional case. The range increases.

  As the bodywork, when the vehicle is a large vehicle, there are a loading platform, an engine, a cabin, a specially equipped body, a battery, a fuel tank, and the like.

  The operation of the first embodiment will be described.

  Since the chassis frame structure 1 for a vehicle has an inclined surface portion 5 formed at a corner portion of the side member 2, and the cross member 3 is fastened to the inclined surface portion 5 via a reinforcing plate 6, A head of the fastening member 4 (or a pier when the fastening member 4 is a rivet) is provided on the inclined surface portion 5 of the side member 2.

  (1) Thereby, in the chassis frame structure 1 for a vehicle, the head of the fastening member 4 does not protrude from the upper surface of the side member 2 on which the bodywork is placed. Thus, there is no need to provide a wharf escape spacer between the protruding rivets, and it is possible to reduce the mounting cost and reduce the vehicle weight during mounting.

  Further, in the chassis frame structure 1 for a vehicle, the inclined surface portion 5 is formed so as to be inside the outer surface of the web 2w and inside the outer surface of the flange 2f. The head of the fastening member 4 does not protrude.

  (2) For this reason, in the chassis frame structure 1 for a vehicle, the fastening member 4 does not get in the way when the bodywork is mounted, and a structure adapted to various vehicle performances can be provided. Freedom and bodywork workability are improved.

  (3) Furthermore, in the chassis frame structure 1 for a vehicle, the side member 2 and the reinforcing plate 6 are fastened at the inclined surface portion 5 that is closer to the center of the side member than the flange surface. Even if torsional input is applied to the side member by road surface input or the like, the deformation of the inclined surface portion 5 is small as compared with the conventional flange fastening type, stress is not easily applied to the fastening member 4, and the fastening member 4 is not damaged. Thereby, it can be set as a highly durable flame | frame. The same applies when the side member is bent up and down due to road surface input while the vehicle is running.

  (4) Further, in the chassis frame structure 1 for a vehicle, the side member 2 and the reinforcing plate 6 are fastened by the inclined surface portion 5 far from the side member torsion center as compared with the web surface, so that torsion input is applied to the side member. However, it can be set as a frame with higher torsional rigidity compared with the conventional web fastening type.

  In the conventional structure, since the effects of (3) and (4) are contradictory to each other, there is no choice but to select the structure so that only one of the effects can be exhibited from the vehicle needs such as rigidity and strength. . However, since the chassis frame structure 1 for a vehicle overcomes the disadvantages by having an intermediate performance between both the conventional flange fastening type and the web fastening type, both high durability and high torsional rigidity can be achieved.

  A second embodiment will be described.

  As shown in FIG. 3, in the vehicle chassis frame structure 31 according to the second embodiment, in addition to the configuration of the reinforcing plate 6 described in FIG. 1, both sides of the other end portion of the reinforcing plate 6 are the side members 2. A reinforcing plate 36 is used, which extends along the height direction of the web 2w and is formed with extending portions 6e, 6e that overlap the web 2w.

  A plurality (two in FIG. 3) of web-side fastening holes 2hw for fastening the reinforcing plate are formed in the upper part of the web 2w of the side member 2. Each extending portion 6e is formed with an extending side fastening hole 36h that overlaps the web side fastening hole 2hw.

  The vehicle chassis frame structure 31 is assembled by inserting the fastening member 4 into the web side fastening hole 2hw and the extension side fastening hole 36h and fastening them.

  In the vehicle chassis frame structure 31, the extension portions 6 e and 6 e of the reinforcing plate 6 can achieve the combined use of the fastening at the inclined surface portion 5 and the web fastening, so that higher durability can be obtained.

In the above embodiment, the side members 2 and cross members 3 have been described in example linked via the reinforcing plate 6 separate, extended as the reinforcing plate 6 of the illustrated reinforcing plate 6 to the end of the click Rosumenba By forming out, the reinforcing plate 6 formed on the cross member directly on the side member may be connected by the fastening member.

  In FIG. 2, as an example of the cross member, the cross member 3 arranged at a predetermined interval along the longitudinal direction of the vehicle so as to cross between the two side members 2 and 2 along the vehicle width direction has been described. However, as shown in the modified example of FIG. 4, a bracket 43 partially protruding in the vehicle width direction from the inner side of one side member 2 may be used as the cross member.

  A support portion 44 is provided at the tip of the bracket 43 to support the bodywork from an obliquely downward direction. When the bracket 43 is used, a reinforcing plate 46 that overlaps continuously with the inner surfaces of the upper and lower inclined surface portions 5 is used instead of the reinforcing plate 6 described above.

  According to the modification of FIG. 4, the bracket 43 is connected to the both side members 2 and 2 by the fastening member 4 via the reinforcing plate 46 so as to face each other. The bracket 43 is an engine bracket) and a suspension (the bracket 43 in this case is a suspension bracket) and the like can be supported, and the same effects as (1) and (2) described above can be obtained.

  Further, as the cross member, in addition to the cross member 3 that crosses the side members 2 and 2 along the vehicle width direction in plan view, the cross member that crosses along the oblique direction with respect to the vehicle width direction in plan view, You may use what cross members cross between the side members 2 and 2. FIG.

  In the said embodiment, although the inclined surface part 5 was demonstrated in the example formed over the full length of a side member, you may form an inclined surface part only in the part to which a cross member is connected.

  In FIG. 3, the fastening at the inclined surface portion 5 and the web fastening are used together, but the fastening at the inclined surface portion 5 and the flange fastening may be used in the same manner.

FIG. 1A is a perspective view showing a main part of a chassis frame structure for a vehicle which is a preferred first embodiment of the present invention, and FIG. 1B is a cross-sectional view for explaining the mounting range thereof. It is a whole perspective view of the chassis frame structure for vehicles shown in FIG. It is a perspective view which shows the principal part of the chassis frame structure for vehicles which is suitable 2nd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the modification of this invention. It is a perspective view which shows the principal part of the chassis frame structure (flange fastening type) for the conventional vehicles. It is a perspective view which shows the principal part of the chassis frame structure (flange fastening type) for the conventional vehicles. It is a perspective view which shows the principal part of the chassis frame structure (web fastening type) for the conventional vehicles. It is a perspective view which shows the principal part of the chassis frame structure (web fastening type) for the conventional vehicles.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chassis frame structure 2 for vehicles Side member 3 Cross member 4 Fastening member 5 Inclined surface part

Claims (4)

A vehicle in which a cross member is mounted through a reinforcing plate in a groove of a side member having a web and a flange to form a U-shaped cross section, and the reinforcing plate and the cross member are connected to each other through a fastening member. In the chassis frame structure, the inclined surface portion is formed by bending the corner portion where the web and flange of the side member intersect to form a chamfered corner portion, and the reinforcing plate is formed from one end portion on the cross member side. It is formed in a mountain shape so as to expand toward the other end on the side member side, and the other end is bent to form a reinforcing side inclined surface that overlaps the inclined surface, and the reinforcing side inclined surface and the inclined surface are overlapped. , Shashifure for a vehicle, characterized in that they have entered into mutually reinforcing plate of the side members and the cross member are provided with the fastening member to the inclined surface portion Structure.   The chassis frame structure for a vehicle according to claim 1, wherein the inclined surface portion is formed so that the fastening member is located inside the outer surface of the web and inside the outer surface of the flange. The vehicle chassis frame structure according to claim 1, wherein an extension portion is formed on the reinforcing plate so as to overlap the web of the side member, and the extension portion and the web are further fastened by a fastening member. The two side members are arranged in parallel, the cross member is formed in a U-shaped cross section having a web and a flange, and the cross member is elongated in the longitudinal direction of the side members so as to cross between the two side members in parallel. The chassis frame structure for a vehicle according to any one of claims 1 to 3, wherein a plurality of rows are arranged at predetermined intervals along a direction, and both end portions of the cross members and two parallel side members are connected by a fastening member.

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