JPS598560A - Supporting device of steering column - Google Patents

Abstract

PURPOSE:To reduce the initial impact load being added to a steering column, by overlapping slide plates each other on both sides of a setting piece and a capsule plate constituting a supporting device bearing the above caption, while making the capsule plate slidable in a direction toward the front in relation to a car body. CONSTITUTION:At the underside of a dash panel 19, a capsule plate 21 and a setting piece 15a of a bracket 15 overlap each other while both end parts of an impact absorbing plate 25 being bent in U-shaped form are secured to a space between each of front end parts of both these elements 21 and 15a. On the other hand, slide plates 30 being bent in U-shaped form each are overlapped on both sides of the said capsule plate 21 and at the same time, identical slide plates 29 are overlapped on the setting piece 15a too. If doing like this, in the case where impact load is added to a steering column 13, first the bracket 15 and the capsule plate 21 are moved forward together as one body, then the rear end edge of a long slit 32 of the capsule plate 21 butts a bolt 24, a point thereat the bracket 15 alone further moves frontward and at this time, an impact absorbing plate 25 is deformed to some extent and well absorbs the impact force.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steering column support device that absorbs and alleviates the impact force received when a driver hits the steering wheel during a vehicle collision.

As shown in Figure 1, the steering device is Dalashi-1 panel 19.
Brackets I-12 are fixed to the lower side of the frame with bolts 24, and brackets I-15 each having a U-shaped cross section are fixed with bolts 24.
These brackets 1-1 are slidably supported with
The steering column 13 is supported at 2.15.

A steering wheel A7) 19, which connects the steering wheel 18 to its proximal end, is supported on the steering column 13 in a rotatable but non-axially movable manner. The tip of the steering shirt (9) is connected to one end of the intermediate shaft 7 with a universal joint 8, and the other end of the intermediate shaft 7 is connected to the input shaft 3 of the steering gear mechanism 2 with a universal joint 4.

Then, the rotation of the steering wheel 18 is transmitted to the input horn shaft 3 of the steering gear mechanism 2, and in the case of the rack and vinyl 12 type, the rack rod 1 that meshes with the input shaft 3 is driven. The steering wheel is deflected via a linkage mechanism.

The intermediate shaft 7 is used to change the direction of the steering shafts 1 to 9 relative to the input shaft 3 due to the arrangement of the steering gear 12, and is arranged to pass through the floor panel 6. Covered by dustproof boots 5.

By the way, as a #i impact absorption device for a steering column, for example, as shown in U.S. Pat. A system has been proposed in which the steering column 1-9 and the input shaft 3 having a steering tooth width of 1111112 are connected to two universal joints 8.4 and 1 as shown in FIG. It is difficult to apply this method to a device that is connected with two intermediate shafts 7.

At this point, the second shock absorber for the steering column is installed.
．． The one shown in Figure 3 has been proposed. That is,
A bracket 1-15 bent into a U-shaped cross section is fixed to the upper end of the steering column 13 by welding or the like, and a mounting piece 15a formed by bending both ends of the bracket 15 outwards has a long width on the rear end side. A notch 31 is provided, and one end of the W impact absorbing plate 25 bent into a U-shape is connected to the front edge by welding or the like.

On the other hand, on the lower surface of the dash panel 19, a capsule plate 21 having holes through which the ports 1 to 24 are inserted is supported by the ports 1 to 24, and the other end of the shock absorbing plate 25 is welded to the front edge of the capsule plate 21. are combined by

Then, the spacer 22 bent into a U-shape is superimposed on both sides of the mounting piece 15a, and is fitted onto the capsule plate 21, and the bolt 24 is passed through 2 and the nut 23 is tightened τ.
It is supported by the dash panel 19.

In such a conventional shock absorbing device, when an impact load is applied to the bracket 15 via the steering column 13,
When the mounting piece 15a of the bracket 15 tries to detach from the spacer 22, the static friction force between the mounting piece 15a and the spacer 22 and the resistance force against the deformation of the shock absorbing plate 25 act simultaneously, and a large resistance force is generated. #j Because of this, it is difficult to sufficiently alleviate the impact force that the driver receives from the steering wheel in the event of an accident.

The purpose of the present invention is to solve these problems, and when a shock load is applied to the steering column, the shock absorbing plate does not deform at first, only the brackets 1 to 1 slide against the dash panel, and then the shock absorbing plate does not deform. An object of the present invention is to provide a support device for a steering column in which an initial impact load can be reduced by deforming an absorbing plate to absorb impact force.

Therefore, the configuration of the present invention includes a bracket fixed to the steering column and slidably supported on the vehicle body side, and a capsule plate sandwiched between the mounting piece of the bracket and the vehicle body side and supported by bolts. In a steering column support device formed by joining both ends of a shock absorbing plate bent into a U-shape, sliding plates made of a low-friction material are superimposed on both sides of the mounting piece and the capsule plate, respectively, and the The capsule plate is configured to be able to slide forward within a predetermined range with respect to the vehicle body.

To explain the present invention based on an example, as shown in FIG. Board 2
As in the conventional example, both ends of a shock absorbing plate 250 bent into a U-shape are fixed between the front end of the mounting piece 1 and the front end of the mounting piece 15a.

According to the present invention, the sliding plates 30 coated with tetrafluoroethylene resin or the like and bent into a U shape are superimposed on both sides of the capsule plate 21, and a similar sliding plate 29 is also provided on the mounting piece 15a. are superimposed. The capsule plate 21 has an elongated hole 32 extending rearward from the bolt 24.
Further, each of the mounting pieces 15a is provided with a notch 31 extending rearward.

By configuring the present invention as described above, when an impact load is applied to the steering column 13, the bracket 15 and the capsule plate 21 first move forward in one body, that is, in the direction of the arrow, and then the rear end of the elongated hole 32 Only the bracket 1-15 moves when the edge abuts against the bolt 24, and at this time the impact absorbing plate 25 deforms and absorbs the impact force. When the impact load is large, the mounting piece 15a comes off the bolt 24 and the impact absorbing plate 25 is stretched flat.

Since the present invention is configured as described above, the bracket 15 is initially
, the shock absorbing plate 25 and the capsule plate 21 move together, and the shock load is absorbed by this sliding friction, so that the initial shock load that the driver receives from the steering wheel is as shown by the solid line in FIG. It is lower than the conventional example shown by the broken line.

Following this sliding movement, the shock absorbing plate 25 is deformed, so that this deformation sufficiently absorbs the impact energy and protects the driver! It can protect against lizard attacks.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the configuration of a general steering device, Fig. 2 is a side view showing a conventional steering column support device, and Fig. 3 is a horizontal sectional view taken along line ■-■ in Fig. 2. ,
FIG. 4 is a side sectional view showing a steering column support device according to the present invention, and FIG. 5 is a diagram showing the operating characteristics of the device in comparison with a conventional example. 9: Steering shirt 1-13 Steering column 15: Bracket l-15a: Mounting piece 18 Steering wheel 19: Dash panel 21: Capsule plate 24: Bolt 25: Shock absorption plate 29.3o:m
Plate 31: Notch 32: Long hole patent applicant Isuzu Motors Co., Ltd. Patent attorney Toshio Yamamoto Figure 1 Figure 5 230 2115a 31 5 3 Ku4i, 4 //15

Claims (1)

[Claims] A bracket 1~ fixed to the steering column and slidably supported on the vehicle body side, and a capsule plate sandwiched between the mounting piece of the bracket and the vehicle body side and supported by bolts, are folded into a U-shape. In a steering column support device formed by joining both ends of a bent shock absorbing plate,
A steering system characterized in that sliding plates made of a low-friction material are superimposed on both sides of the mounting piece and the capsule plate, respectively, so that the capsule plate can slide forward within a predetermined range with respect to the vehicle body. Column support device.