WO2006067837A1

WO2006067837A1 - Cab-over-engine vehicle and method of mounting cab

Info

Publication number: WO2006067837A1
Application number: PCT/JP2004/019100
Authority: WO
Inventors: Toshimasa Yamamoto
Original assignee: Nissan Diesel Motor Co., Ltd.
Priority date: 2004-12-21
Filing date: 2004-12-21
Publication date: 2006-06-29
Also published as: AU2004325797A1; CN100577495C; CN101087713A; AU2004325797B2

Abstract

A cab-over-engine vehicle in which springs are neared to the center of gravity of a cab without reducing the space in the cab, thereby ride quality of the cab is improved. Those lower sides (23b) of side members (23) that are near connection sections (23a) at which the side members (23) and a front cross member (21) are connected are inclined upward, and at least portions of springs (24a) are disposed in space in front of the inclined lower surfaces (23b).

Description

Specification

Cabover vehicle and method of mounting the same

Technical field

TECHNICAL FIELD [0001] The present invention relates to a cap-over vehicle for supporting a cap by a spring on a chassis frame and a method for mounting the cap.

Background art

[0002] The following is known as a so-called floating mount type overover vehicle in which a cap is inertially supported by a coil spring or the like on a chassis frame.

[0003] That is, the underbody of the cap and the chassis frame are connected via a cap mount bracket, and a coil spring is interposed between the cap mount bracket and the chassis frame. (Patent Document 1).

Patent Document 1: Japanese Utility Model Publication No. 06-029986 (Fig. 1)

Disclosure of the invention

Problems to be solved by the invention

[0004] It is known that in a floating mount type of a rideover vehicle, the ride comfort can be improved by bringing the coil spring close to the center of gravity of the cap in the vertical direction. However, in this vehicle, the coil spring is interposed between the chassis frame and the cap mount bracket. Since there is a side member as a strength member constituting the underbody on the cap mount bracket, it cannot simply be moved upward. If the side member is moved upward in order to move the coil spring upward, the cabin space becomes low. Further, if the coil spring is moved forward and then moved upward, the height of the cabin space can be secured. In this case, however, if the coil spring is simply moved forward, the total length of the vehicle will increase. For this reason, in countries where the total length of vehicles traveling on public roads is regulated by law, it is necessary to shorten the front and rear dimensions of the cab or cargo bed according to the law, reducing the cabin space in the front and back, or reducing the loading capacity of the cargo bed Resulting in. [0005] Therefore, the present invention provides a cover-over vehicle that moves the spring vertically in relation to the center of gravity of the cap without reducing the cabin space and without increasing the overall length of the vehicle. The purpose is to improve ride comfort.

Means for solving the problem

[0006] The present invention provides a cab over vehicle and a cab mount method thereof. The vehicle overwheel according to the present invention includes a front cross member that is disposed at the lower front end of the cap and extends in the left-right direction of the cap, and a side member that is coupled to the front cross member and extends in the front-rear direction of the cap. An underbody configured to include a cap mount bracket that is attached to the under body and connects the under body and the chassis frame, and is interposed between the chassis frame and the cap mount bracket. And a spring that inertially supports the cap on the chassis frame. In one embodiment of the present invention, the side member is formed such that the lower surface in the vicinity of the coupling portion with the front cross member is inclined upward toward the front of the cap, and the spring is the inclined lower surface of the side member. At least a part of the bracket is disposed in the space above the rear end of the inclined lower surface of the bracket.

The invention's effect

[0007] According to the present invention, in the side member, the lower surface is inclined upward in the vicinity of the coupling portion with the front cross member, so that the space for disposing the spring in front of the inclined lower surface. Is formed. For this reason, by disposing at least a part of the spring in this space, it is possible to bring the spring without moving the side member up and down in the vertical direction with respect to the center of gravity of the cap, thereby improving the ride comfort of the cap over vehicle. it can.

[0008] Other objects and features of the present invention can be understood from the following description with reference to the drawings.

[0009] The contents of the Japanese patent application (Japanese Patent Application No. 2003-194667), which is the basis of the priority claim, is incorporated and referenced as part of this application.

Brief Description of Drawings

[0010] [FIG. 1] A bottom view of a cap of a cab over vehicle according to an embodiment of the present invention.

[Figure 2] Side view of the above-mentioned cap FIG. 3 is an explanatory diagram of a cab mount structure according to an embodiment of the present invention.

[Fig.4] Front part of the mount bracket in the above mount structure

[Fig. 5] Illustration of a cab mount structure as a comparative example

[Figure 6] Front part of the cap mount bracket in the same cap mount structure

Explanation of symbols

[0011] 20 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 24a ... Front coin spring as first spring, 24b ... Rear coin spring as second spring, 25 ... Cab mount bracket, 25a ... Front end of cap mount bracket, 26 ... · Chassis frame, 27, 28 ”bolt.

BEST MODE FOR CARRYING OUT THE INVENTION

[0012] Embodiments of the present invention will be described below with reference to the drawings.

[0013] FIG. 1 is a bottom view of a cap 20 of a cap-over vehicle according to this embodiment, and FIG.

Show 20 side views!

[0014] A front cross member 21 and a rear cross member 22 are provided at the front lower portion and the rear lower portion of the cap 20 so as to extend in the left-right direction of the cap 20, respectively. In addition, side members 23 and 23 for supporting the lower surface of the floor panel forming the floor surface of the cap 20 are provided in the lower left portion and the lower right portion of the cap 20 so as to extend in the front-rear direction of the cap 20. . The side member 23 is coupled to the rear surface of the front cross member 21 at the front end, and is coupled to the front surface of the rear cross member 22 at the rear end. The underbody of the cab is composed of the front cross member 21, the rear cross member 22 and the side members 23 and 23 and the floor panel.

[0015] A front coil spring 24a is provided below the connecting portion between the front cross member 21 and the side member 23, and a rear coil spring 24b is provided below the connecting portion between the rear cross member 22 and the side member 23. It has been. The cap 20 is supported on the chassis frame 26 (FIG. 3A) via these coil springs 24a and 24b. Front coil spring (corresponding to “first spring”) 24a and rear coil spring (corresponding to “second spring”) 24b This is not limited to coil springs, but is elastic such as air springs or rubber. A member can be employed.

As shown in FIG. 2, the side member 23 is formed such that the lower surface 23b in the vicinity of the coupling portion 23a with the front cross member 21 is inclined upward toward the front of the cap 20 over a predetermined length. The

FIG. 3 is an enlarged view of the lower part of the front end of the cap 20 and shows the cap mount structure according to this embodiment in detail.

[0018] In the present embodiment, the front cross member 21 and the side member 23 are coupled by the coupling portion 23a, and are coupled by the cab mount bracket 25 that connects the underbody and the chassis frame 26. . The cab mount bracket 25 has a U-shaped rear cross section, and wraps the side member 23 with a downward force (FIG. 3B). The cap mount bracket 25 is fastened to the rear portion of the side member 23 at the rear side of the inclined lower surface 23b of the side member 23 from the bolt 27, and the front and rear directions of the cap 20 with respect to the chassis frame 26. Are swingably connected around a vertical axis AX. In addition, the cap mount bracket 25 extends forward of the front cross member 21 to the vicinity of the front of the front cross member 21 at the front, and the front end of the front cross member 21 at the front end 25a. Bonoreto 28 [I ’m hoofed from here!

[0019] A front coil spring 24a is disposed in a space formed in front of the side member 23 by tilting the lower surface 23b of the side member 23 upward. The front coil spring 24a is interposed between a spring seat 26a formed on the chassis frame 26 and a spring seat 25b formed on the front portion of the mount bracket 25, and the cap 20 is connected to the chassis frame 26. Supports inertially above. In this installed state, the front coil spring 24a is positioned in front of the inclined lower surface 23b of the side member 23, and the left / right force is surrounded by the cap mount bracket 25. 25 extends on the left and right sides of the front coil spring 24a in front of the lower surface 23b (FIG. 1). Further, the side surface of the front front coil spring 24 a in the front-rear direction of the cap 20 is set at the same position as the front surface of the front cross member 21.

[0020] According to the present embodiment, the following effects can be obtained. [0021] First, in the present embodiment, in the side member 23, the lower surface 23b in the vicinity of the coupling portion 23a with the front cross member 21 is inclined upward toward the front of the cap 20, so that the inclination is caused. A space for arranging the front coil spring 24a is formed in front of the lower surface 23b. Therefore, the front coil spring 24a can be moved upward without moving the side member 23 upward. That is, in the present embodiment, the front coil spring 24a that does not reduce the cabin space and does not increase the total length of the vehicle is moved vertically with respect to the center of gravity of the cap 20, thereby improving the ride center of the cap 20. be able to.

FIGS. 5 and 6 show a cap mount structure in which a cap mount bracket 4 is attached to the lower surface of the side member 3 and both are coupled to the rear surface of the front cross member 2 as a comparative example. . In this case, in order to bring the spring 5 corresponding to the front coil spring 24a close to the center of gravity of the cap 1, the side member 3 to which the cap mount bracket 4 is fixed must be moved upward. Therefore, the position of the floor panel (not shown) rises and the cabin space becomes low. In addition, if the spring 5 is moved to the lower front side of the front cross member 2 in order to move the spring 5 upward while ensuring the height of the cabin space, the total length of the vehicle is kept within a predetermined range. Therefore, it is necessary to reduce the depth of the loading platform.

In the present embodiment, in particular, the front coil spring 24a is set to the same position as the front surface of the front cross member 21 in order to maximize the front coil spring 24a within a range that does not increase the overall length of the vehicle. It can be placed at the top to maximize the ride comfort of the Cab 20.

Secondly, in the present embodiment, the front cross member 21 and the side member 23 are directly coupled by the coupling portion 23 a and coupled by the cap mount bracket 25. Therefore, the coupling strength is supplemented by the cap mount bracket 25, and the required coupling strength between the front cross member 21 and the side member 23 can be obtained by the coupling portion 23a and the cap mounting bracket 25.

Third, in the present embodiment, the lower surface 23b of the side member 23 is inclined upward toward the front of the cap 20, so that the front cross member 21 can be coupled to the side member 23. The downward extension amount can be reduced. For this reason, the vertical dimension of the front cross member 21 can be reduced, and the manufacturing cost of the front cross member 21 can be reduced. In this regard, in the comparative example described above (Figs. 5 and 6), the front cross member 2 droops greatly at the joint between the side menno 3 and the cap mount bracket 4 (Fig. 6), which reduces the manufacturing cost. Bulky.

FIG. 4 shows a cap mount bracket 25 according to another embodiment of the present invention. In the present embodiment, the front end 25a of the cap mount bracket 25 is widened in the left-right direction of the cap 20, and a plurality of fastening and fixing portions by bolts 28 are formed at the front end 25a. The configuration other than the front end 25a is the same as that of the previous embodiment (FIG. 3 and the like). According to the present embodiment, the front end 25a of the cab mount bracket 25 is widened to the left and right, and the fastening fixing portions for the front cross member 21 are arranged in parallel on the left and right. The bonding strength can be ensured.

[0027] The present invention has been described above with reference to some preferred embodiments. However, the scope of the present invention is not limited to this description, and is based on the description of the claims. Judged according to the terms of use.

Claims

The scope of the claims

[1] A front cross member disposed at the lower front end of the cap and extending in the left-right direction of the cap.

An underbody configured to include a side member coupled to the front cross member and extending in the longitudinal direction of the cap;

A cap mount bracket attached to the underbody and connecting the underbody and the chassis frame;

A first spring that is interposed between the chassis frame and the mount bracket and supports the cap on the chassis frame in an inertial manner. The lower surface near the joint with the front cross member is formed by inclining upward toward the front of the cap,

The first spring is a Caber wheel in which at least a part of the first spring is disposed in front of the inclined lower surface of the side member and in a space above the rear end of the inclined lower surface of the bracket.

[2] The cap mount bracket is fixed to the side member at the rear portion, while the front portion extends forward from the rear surface of the front cross member, and is fixed to the front cross member at the front portion. The overdrive vehicle according to claim 1.

[3] The cover-over vehicle according to claim 2, wherein the cap mount bracket is fixed to a front surface of the front cross member at a front portion.

[4] The cover-over vehicle according to claim 3, wherein a front portion of the cap mount bracket is widened to the left and right to form a plurality of fastening and fixing portions with respect to a front surface of the front cross member.

[5] The cap according to any one of claims 2 to 4, wherein the cap mount bracket has a shape in which a front portion extends in front of an inclined lower surface of the side member and extends laterally of the first spring. A talented car.

6. The overcab wheel according to claim 15, wherein the cap mount bracket is movably connected to the chassis frame at a rear portion.

7. The vehicle according to any one of claims 1 to 6, wherein a side surface of the first spring with respect to a front-rear direction of the cap is disposed at substantially the same position as a front surface of the front cross member.

[8] The cap mount bracket is interposed between the chassis frame and the underbody behind the connecting portion with the chassis frame, and supports the cap on the chassis frame. 8. The overdrive vehicle according to claim 11, further comprising a second spring.

[9] A front cross member that extends in the left-right direction of the cap at the lower front end of the cap and a side member that is coupled to the front cross member and that extends in the front-rear direction of the cap. A method of inertial support on a chassis frame,

The lower surface of the side member is inclined upward toward the front of the cap in the vicinity of the joint with the front cross member,

The front portion of the cap mount bracket that connects the cap and the chassis frame is extended forward from the rear surface of the front cross member, and the front portion and the front cross member are joined together. The front cross member and the side member are connected by a mounting bracket,

At least a part of the spring for elastic support is placed in a space between the chassis frame and the cap mount bracket and surrounded by the front cross member, the side member, and the cap mount bracket. How to mount the overcar vehicle.