JPS60226371A - Steering structure of cab-over type car - Google Patents

Abstract

PURPOSE:To facilitate the lay-out of the parts such as engine by allowing a steering shaft to penetrate through a penetration hole formed at the cross joint part between a cross member and a side frame. CONSTITUTION:A side frame 13 and a cross-member 14 are arranged onto the undersurface of a floor panel 9, and the cross joint part 15 between the both is arranged under an insertion hole 11 which penetrates a steering shaft 7. The cross joint part 15 is constituted of a reinforcing body 16, and a penetration hole 17 is formed. A steering gear box 5 is installed onto the undersurface of the cross-member 14 directly under the penetration hole 17 by a bolt screwed into an installation nut 18. Therefore, the arrangement position of the steering shaft and the gear box is not restricted by the cross-member 14 and the side frame 13, and the lay-out for arranging other parts such as engine is made simple.

Description

[Detailed Description of the Invention] The present invention relates to a steering structure for a cab-over type vehicle.
More specifically, the present invention relates to a steering structure in which the arrangement position of the steering shaft is improved.

For conventional cab-over type vehicles, Utility Model 13431
As an example is shown in Japanese Patent No. 9, the steering gear box is placed on the side of the cross member or side frame to avoid interference between the steering shaft and the cross member or side frame. This posed the problem of taking up space for the steering gear and making it difficult to layout other parts such as the engine.

SUMMARY OF THE INVENTION An object of the present invention is to provide a steering structure that solves the problems of the prior art described above and also provides good results in terms of the strength and NII properties of the cross member and side frames.

In order to achieve the above-mentioned object, the present invention is characterized in that a through hole is provided in the cross joint between the cross member and the side frame, and a steering shaft is passed through the through hole to configure a steering structure for a cab-over type vehicle. do.

The present invention will be specifically described below based on embodiments shown in the drawings.

The illustrated embodiment relates to a steering system in which a rack and pinion steering gear is biased. 1 is the steering wheel, 2 is the upper steering shaft,
3 is a lower steering shaft, 4 is a steering column, and 5 is a steering gear box incorporating the above-mentioned steering gear.The operating rod 6 that constitutes the rack of the steering gear 11 is a seven-point lever, a tile rod, and a knuckle arm (not shown). It is connected to the left and right front through.

The steering shaft 7 is configured by connecting the upper steering shaft 2 and the lower steering shaft 3 through a universal joint 8. Further, the lower steering shaft 3 is divided into upper and lower parts below the floor panel 9, and these divided parts 3a and 3b are connected by a flexi-pull joint 10.

The floor panel 9 is provided with an insertion hole 11 through which the steering shaft 7 is inserted, and the upper divided portion 3a of the ζ lower steering shaft 3 is inserted through the insertion hole 11. Also, this insertion hole 11
A cap-shaped seal 12 is attached to the periphery of the insertion hole 11 to seal the gap between the steering shaft 7 and the steering shaft 7.

A side frame 13 and a cross member 14 are arranged on the lower surface of the floor panel 9.
5 is located below the insertion hole 11. In this cross joint portion 15, as shown in FIG. 3, the side frame 13 and the cross member 14 are joined by a reinforcement 16 using spot welding. On the cross member 14 side of the cross joint portion 15, the overlapping area between the cross member 14 and the reinforcement 16 is set to a wide area in order to increase strength and rigidity. A through hole 17 for inserting the upper divided portion 3b of the upper and lower steering shaft 3 described above is provided in this overlapping portion, while a plurality of small holes are provided around the through hole 17, and a nut 18 is welded onto each small hole. .

The steering gear box 5 is provided with the nut 1 on the lower surface of the cross member 14 directly below the through hole 17.
It is attached using a bolt 19 screwed into 8. The steering shaft 7 passes through the through hole 17 at the upper divided portion 3b, and the flexible joint 10 is accommodated in the cross member 14.

The present invention can be configured in various ways other than those shown in the above embodiments. For example, the steering shaft 7 is formed by connecting an upper steering shaft 2 and a lower steering shaft 3 with a universal joint 8, but the steering shaft 7 may have other configurations such as one in which both are integrally connected in a straight line. There may be. Although the above embodiment relates to a steering system with a rack and pinion steering gear, it is also possible to implement the invention in other types of steering systems. Further, in the above embodiment, the cross member 14 of the cross coupling section 15
Although the through hole 17 is provided on the side, the through hole 17 may be provided on the side frame 13 side. However, in this case, in order to avoid a decrease in strength due to the provision of the through hole 17,
It is necessary to make the area of the cross-coupling portion 15 of the side frame 13 large, and also to make the overlapped portion with the reinforcement 16 large.

It can be effective.

■ The location of the steering shaft and steering gear box is not restricted by the cross member or side frame, making it easier to design the steering. This increases the space available for arranging other parts such as the engine, making the layout of these parts easier.

■ The cross joint can be formed to have a relatively large area, so even if a through hole is provided here, there will be little effect on the strength and rigidity. Since it can be bolted, the strength of the connection between the cross member and the side frame can be increased.

[Brief explanation of the drawing]

FIG. 1 is a schematic longitudinal sectional side view of an embodiment of the present invention, and a perspective view showing a part of the cross-coupled mk floor panel of the sempa and the side frame with a cutaway 1. 5--Steering gear box 7--Steering shaft 13-m-Side frame 14--Cross men's nose (15-11 and fork joint 171--Koto Kaiyoshi Patent attorney Masaru Ishihara @1 figure

Claims (1)

[Claims] (1) A steering structure for a cab-over type vehicle in which a through hole is provided at the cross-joint portion of the cross member and the side frame, and a steering shaft is inserted through the through hole as a standby device.