JPH06227405A - Support device of steering column - Google Patents

Abstract

PURPOSE:To hold a bracket for normally supporting a steering column in a very stable state in a structure of lightening a shock at the time of collision or the like. CONSTITUTION:A sliding plate B forms support plates 7, 7 formed on the upper side and the lower side through a folded bending part. Fixing through holes are provided on the support plates, a collar part 10 is formed in the periphery of at least one fixing through hole, and front sid pressing projection 11 and the back side pressing projection 12 are formed substantially parallel to each other on the folded bending part 8. A horizontal part having sliding notches on both sides in the cross direction are formed on a bracket A, and the front side pressing projections 11, 11 of the sliding plate B are fixed to each other by the back side pressing projections 12, 12, with the horizontal part sandwiched therebetween in a designated position in the interior of a car.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering system which can always hold a bracket for supporting a steering column in an extremely stable state in a shock absorbing structure when a driver hits a steering wheel at the time of collision. A support device for a column.

[0002]

2. Description of the Related Art There are various means for fixing a bracket for supporting a steering column in a vehicle body so that the bracket can be moved only at the time of impact, and a general one will be briefly described. A plate is bent into a U shape. A bracket is fixed in a vehicle body so as to be movable in the front wheel direction at the time of impact by using a long hole for inserting a fixing bolt and a sliding plate having pressing portions formed on both sides of the long hole along the longitudinal direction thereof. .

[0003]

According to the prior art, in the case of a fixed bracket having no tilt mechanism, the fixed bracket is elastically supported by the pressing portion of the sliding plate, and the contact state of the pressing portion is one-point contact. Even if it becomes a support, the bracket and the column can be stably supported.

However, in the steering device having a tilt mechanism, when the steering column is moved up and down, a vertical load is applied to the fixed bracket from the steering column when the tilt is operated, and further, the sliding that supports the bracket in a resilient state. It is difficult for the plate to receive the load evenly.

Further, a large and small bending moment is apt to occur due to the positional deviation between the fixed position of the sliding plate and the tilting shaft of the bracket, and the pressing support portion of the sliding plate and the bracket are in one-point contact. There is a problem that the support state is likely to occur, the play is loosened in the bracket elastically supported by the sliding plate with the location as a fulcrum, and the mounting rigidity of the steering column is reduced.

Further, against the bolt load, in the pressing portion of the above-mentioned prior art, since the plate is a flat convex portion (pressing portion), good elastic performance cannot be obtained and elastic load is applied. Sometimes it becomes difficult to deform.

Therefore, the pressing portion for elastically pushing the bracket is set in a place where the change of the elastic load is large, and it is difficult to stabilize the setting of the elastic load, and the tolerance to the dimensional variation becomes very small. However, the dimensional accuracy must be increased, which increases the construction cost.

[0008]

Therefore, as a result of earnest studies, the inventors of the present invention have solved the present invention as a result of solving the above problems.
Two support plates are formed above and below via the folded back portion, and fixing through holes are provided in both support plates, and at least one fixing through hole is formed with a collar portion in the direction of the opposing support plate, A sliding plate in which the front-side pressing protrusions and the rear-side pressing protrusions are formed substantially parallel to the folded-back bent portion and formed on both supporting plates at predetermined intervals, and a horizontal portion having sliding notches on both sides in the width direction. A steering column comprising a bracket formed with a bracket and a front side pressing ridge and a rear side pressing ridge that are vertically opposed to each other and fixed to the vehicle body through a fixing through hole while sandwiching a horizontal portion of the bracket. By using the support device, the steering column and the bracket react very well and move at the time of impact with a very simple structure, and are extremely stable at all times. It is intended to be fixed at state.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described below with reference to the prize plane. As shown in FIG. 1, a steering shaft 1 is installed in a steering column 2 and the steering column 2 is mounted in a vehicle interior by a bracket A. It is fixed in place.

As shown in FIGS. 1 to 3, the bracket A is configured to support the steering column 2, and the lifting bracket 3 for raising and lowering the steering column 2 and the steering column 2 are fixed at predetermined positions. It consists of a fixed bracket A1 and a lifting bracket 3
Moves up and down with respect to the fixed bracket A1 to set the steering shaft 1 at an appropriate position.

The fixed bracket A1 of the bracket A has horizontal mounting and fixing portions 5 and 5 formed outward from the upper ends of the supporting side portions 4 and 4, and both mounting and fixing portions 5 and 5 have the same symmetrical shape. And includes horizontal portions 5a, 5a and slopes 5b, 5b of the respective mounting and fixing portions 5, 5.

The horizontal portions 5a, 5 of the mounting and fixing portions 5, 5
As shown in FIG. 8, notches 6 and 6 for sliding are formed in a, and the notches 6 for sliding are formed in a substantially U shape when seen in a plan view, and the steering wheel of the bracket A is formed. The W side is opened, and a sliding plate B, which will be described later, is provided near the sliding notch 6 of each horizontal portion 5a (see FIGS. 2 and 7).

The sliding plate B is, as shown in FIG.
7 are integrally formed so as to face each other, and fixing through holes 9, 9 are formed in substantially the center of both the upper and lower support plates 7, 7.

A collar portion 1 is provided between the opposing support plates 7, 7.
0 is formed so that both support plates 7 and 7 can maintain a constant interval. The collar portion 10 is specifically, as shown in FIG. Collars 10, 1 formed in both fixing through holes 9, 9 around the through holes 9, 9 for the other side.
The tips of 0 contact each other.

Further, the collar portion 10 is formed in only one of the fixing through holes 9 and 9, and the tip of the collar portion 10 abuts the other supporting plate 7 so that the supporting plates 7 and 7 are fixed. There is also an example in which the interval is kept constant (see FIG. 6).

A front side pressing ridge 11 and a rear side pressing ridge 12 are formed on both of the support plates 7, 7, and the front side pressing ridge 11 and the rear side pressing ridge 12 are on the other side. Front protrusion ridges 11, 11 formed on the supporting plates 7 and 7 facing each other and rear side protrusion ridges 12, 12 are formed as projecting strips toward the support plate 7 side.
The two are substantially in contact with each other.

Here, when the sliding plate B is mounted on the bracket A, the front side pressing ridge 11 is located on the front wheel side, and the rear side pressing ridge 12 is located on the steering wheel W side (FIG. 1 to 3).

Further, the front side pressing ridge 11 and the rear side pressing ridge 12 are substantially parallel to the folded-back bent portion 8 of the sliding plate B, and the cross section thereof is a substantially flat mountain-shaped arc. ing.

Both supporting plates 7 of the sliding plate B,
As shown in FIG. 5 (b), 7 has a notch formed in the front and rear, and the folded back bent portion 8, the front side pressing protrusion 11 and the rear side pressing protrusion 12 are widthwise at the notches. Are formed separately.

There is also an embodiment in which the notch is not formed in the sliding plate B.

The horizontal portion 5a of the bracket A is sandwiched between the support plates 7, 7 of the sliding plate B, and the collar portion 1 of the sliding plate B is sandwiched.
0 and 10 are inserted into the sliding notch 6, and the sliding notch 6
And the fixing through holes 9, 9 are aligned in position.

Furthermore, the upper and lower surfaces of the horizontal portion 5a of the bracket A are pressed by the front side pressing protrusions 11 and 11 and the rear side pressing protrusions 12 and 12 of the upper and lower support plates 7 and 7 of the sliding plate B. It is fixed.

Specifically, the horizontal portion 5a of the bracket A is sandwiched between the support plates 7 and 7 of the sliding plate B, and the fixing tools 1 such as bolts and nuts are inserted in the fixing through holes 9 and 9.
When fixed to a predetermined place in the vehicle through 5, the pressing contact point P11 is the pressing contact point between the horizontal portion 5a and both front side pressing protrusions 11, 11 and both rear side pressing protrusions 12, 1
When the pressing contact point between the two members is called a pressing contact point P12, the horizontal portion 5a is pressed and fixed at two points of the pressing contact point P11 and the pressing contact point P12 (see FIGS. 3 and 9 etc.). ).

The bracket A is fixed to a predetermined position of the vehicle body through the sliding plate B. When an impact occurs due to a collision or the like, the horizontal portions 5a, 5a of the bracket A are slid on the sliding plate B,
Pressing contact point P by pressing projections 11, 11 on both front sides of B
11 and both rear-side pressing protrusions 12, 12 are adapted to slide against the pressing force at the pressing contact point P11 and to move forward (see the chain line portion in FIG. 2).

Further, crushing penetration portions 13 are formed on the slopes 5b, 5b formed on the mounting and fixing portions 5, 5 of the bracket A, and the crushing penetration portions 13 cause the energy absorber 14 to be crushed and swelled under pressure. By crushing the strip 14a,
It is designed to be able to absorb the energy of impacts such as collisions.

The energy absorber 14 is composed of a crushed and swollen ridge 14a and a plate-shaped mounting portion 14b. The plate-shaped mounting portion 14b is inserted into the crushing opening 13a of the crushing penetrating portion 13 so as to crush and swell. The ridge 14a is locked in the crushing opening 13a, and the end of the plate-shaped mounting portion 14b is fixed together with the sliding plate B through a fixing tool 15 so as to be immovable in the vehicle.

When the bracket A moves to the front wheel side when an impact occurs, the crushing opening 13a of the crushing penetration portion 13 is formed.
The energy can be absorbed by moving while crushing the crushed bulging strip 14a of the energy absorber 14.

[0028]

According to the present invention, two support plates 7 and 7 are formed on the upper and lower sides through the folded-back bent portion 8, and both support plates 7 and
7 is provided with fixing through holes 9, 9, and at least one fixing through hole 9 is formed with a collar portion 10 in the direction of the opposing support plate 7, and a front side pressing protrusion 11 and a rear side pressing protrusion 12 are provided. A sliding plate B formed on both supporting plates 7, 7 at a predetermined interval so as to be substantially parallel to the folded-back bent portion 8 and sliding notches 6, 6 on both sides in the width direction.
And the bracket A having the horizontal portions 5a, 5a having the
The fixing through holes 9, while sandwiching the horizontal portions 5a, 5a of the bracket A between each other and between the rear side pressing protrusions 12, 12.
By using the steering column support device that is fixed to the vehicle body via 9, first, the mounting rigidity of the steering column can be improved first, and secondly, the bracket A can be always mounted in a stable state. Produce the effect of.

To explain the above effect in detail, the sliding plate B for mounting the bracket A having the tilt lock mechanism on the vehicle body has the front pressing ridge 1 on both the upper and lower support plates 7, 7.
1 and 11 and rear side pressing protrusions 12 and 12 are formed respectively, and the front side pressing protrusions 11 and 11 and the rear side pressing protrusions 12 and 12 of both upper and lower support plates 7 and 7 of the bracket A are Since the mounting / fixing parts 5 and 5 are sandwiched, as shown in FIG. 3, it is possible to achieve an extremely stable mounting state by supporting the front side pressing ridge 11 and the rear side pressing ridge 12 at two places, and it is possible to make an impact. In the absorbent structure, the mounting and fixing points of the bracket A can be held and fixed in an extremely stable state, and as shown by the chain line portion in FIG.
It is possible to prevent the mounting and fixing portion 5 from swinging in the vertical direction, reliably prevent backlash, and significantly improve the mounting rigidity of the steering device.

Next, the front side pressing protrusions 11 and 11 and the rear side pressing protrusions 12 and 12 formed on the upper and lower support plates 7 and 7 of the sliding plate B make the mounting and fixing portions 5 and 5 of the bracket A uniform. Since it can be supported in a pressed state, it is always in a stable state. As shown in FIG. 11, the bracket A can be disengaged in a substantially horizontal state immediately after the impact is generated, and the bracket A can be dismounted.
It moves forward (on the side of the front wheels) along the axial direction to ensure the safety of the driving vehicle even better.

Further, the front-side pressing protrusion 11 and the rear-side pressing protrusion 12 retain appropriate elasticity to prevent an increase in the pull-out load due to galling at the time of impact.

Next, the front side pressing protrusions 11 and 11 and the rear side pressing protrusions 12 and 12 of the sliding plate B are shown.
Since the spring-like action at the time of pressing exists in a plurality of places, the spring pressing contact with the bracket A is stabilized, the variation of the spring action can be reduced, and the stable region of the spring action can be further widened. , The spring structure can be stabilized very easily and the bracket A
It is possible to elastically support the attachment fixing portions 5 and 5.

Further, since there is a large allowance for dimensional variations during manufacturing, the manufacturing cost can be reduced.

[0034]

[Brief description of drawings]

FIG. 1 is a side view of a steering device using the present invention.

FIG. 2 is a plan view showing a main part of the present invention.

FIG. 3 is a cross-sectional view of an essential part of the present invention.

FIG. 4 is a partially cutaway perspective view of a sliding plate.

5A is a cross-sectional view of the sliding plate, and FIG. 5B is a plan view of the sliding plate.

FIG. 6 is a sectional view of another embodiment of the sliding plate.

FIG. 7 is a perspective view showing a state where a sliding plate is attached to a bracket.

FIG. 8 is a perspective view of a main part of the bracket.

FIG. 9 is a sectional view of a mounting state of a bracket supported by a sliding plate.

FIG. 10 is a sectional view showing a stable state of a bracket supported by a sliding plate.

FIG. 11 is a cross-sectional view showing a state where a bracket supported by a sliding plate is detached.

[Explanation of symbols]

 A ... Bracket 5a ... Horizontal part B ... Sliding plate 6 ... Sliding notch 7 ... Support plate 8 ... Folding bent part 9 ... Fixing through hole 10 ... Collar part 11 ... Front side pressing protrusion 12 ... Rear side pressing protrusion Article

Claims (1)

[Claims] 1. A pair of support plates are formed on the upper and lower sides through folded-back bent portions, fixing through holes are provided in both supporting plates, and at least one fixing through hole has a collar extending in the direction of the opposing support plate. Parts, and a sliding plate in which the front and rear pressing ridges are formed substantially parallel to the folded-back bent portion and formed on both supporting plates at predetermined intervals, and notches for sliding on both sides in the width direction. And a bracket formed with a horizontal portion having a vertical shape, and the front side pressing ridges and the rear side pressing ridges that vertically face each other are fixed to the vehicle body through a fixing through hole while sandwiching the horizontal side of the bracket. A support device for a steering column, which is characterized in that