JPH08104244A - Mounting structure for steering gear - Google Patents

Abstract

PURPOSE: To improve steering rigidity and to improve a steering returning characteristic by maintaining in a low level a vibration noise generated from a steering of an automobile. CONSTITUTION: In a mounting structure for a steering gear 6 wherein a pair of flanges 9, 9 are formed with a space apart on the periphery of a gear case 7 of inserting the steering gear 6, to mount an annular mount rubber 10 between a pair of the flanges, so as to fix the gear case 7 to a car body by a bracket 11 of covering a total unit of the mount rubber 10, a protruding margin 14, which can coat a point end part of the flange, is provided in both edges of the mount rubber 10, and a swollen part 18, by which the protruding margin 14 can be brought into press contact with the point end part of the flange 9, is provided in both edges of the bracket 11. When the gear case 7 is fixed by the bracket 11, since the protruding margin 14 of the mount rubber 10 is clamped to come into press contact by the swollen part 18 and the point end part of the flange 9, rigidity in a width direction of the car body is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a steering gear connected to a steering wheel of an automobile.

[0002]

2. Description of the Related Art Conventionally, a steering wheel, which determines the traveling direction of an automobile, is connected to a wheel suspension via a steering rod or the like. For example, a strut type suspension assembly is as shown in FIG.
A strut 2 is attached to the wheel portion of the front wheel 1 facing upward, an arm 3 is attached to the lower portion of the wheel portion, and a tie rod arm 4 is pivotally supported in the central portion.

The tie rod arms 4 are provided on the left and right wheels, and are connected to both ends of a rod-shaped steering gear 6 by a connector 5, as shown in FIG. 6, and the steering gear 6 is inserted in a gear case 7. A pair of flanges 9 and 9 are formed at intervals on the outer periphery of the gear case 7 in the vicinity where the steering gear 6 and the steering rod 8 are connected. An annular mount rubber 10 for positioning and fixing between the pair of flanges 9, 9 and the mount rubber 10
And a bracket 11 (see FIG. 7) that is curved so as to cover the upper surface of the. Moreover, another bracket 12 for positioning and fixing is attached to another portion of the steering gear 6. The gear case 7 can be fixed to the vehicle body by tightening the brackets 11 and 12 with screws, and the mount rubber 10 reduces tire noise and vibration of the vehicle body.

As shown in FIG. 8, the mount rubber 10 has the same width as the distance between the pair of flanges 9 and 9, and the flanges 13 and 13 are formed on both edges. It is formed in a size that fits between the two flanges 13, 13. The fixed gear case 7 prevents the mount rubber 10 from shaking due to the rigidity of the mount rubber 10 in the shearing direction (see Japanese Utility Model Publication No. 4-23738).

[0005]

When the above gear case 7 is not securely fixed, the steering gear 6 (gear case 7) receives the reaction force from the tire when the steering wheel is operated, and the steering gear 6 (gear case 7) moves in the vehicle width direction. Try to move to.
When the steering gear 6 (gear case 7) moves, the rigidity of the steering system decreases. And since the elasticity of the mount rubber 10 is strong, the hysteresis is large and
If 10 is displaced, there will be a problem that the gear case 7 will not return to its original position even if the steering input is removed. Along with this, there arises a problem that the steering wheel does not return to the neutral position, the steering feeling is deteriorated, and the neutral feeling when going straight is deteriorated.

Therefore, the tightening force of the bracket 11 for fixing the gear case 7 is strengthened to prevent the variation in the vehicle width direction. However, since the tightening margin E of the mount rubber 10 is compressed, durability is improved. The problem is that you have to use a good mount rubber 10. On the other hand, compressing the tightening margin E means that, for example, when a narrow bracket (width B ₁ ) is used as shown in FIG. 9, the mount rubber 10 is rolled and both edges are protruded. Since it goes around the bracket 11, workability is poor and it is not desirable.

It is therefore an object of the present invention to provide a steering gear mounting structure in which the tightening force of the bracket is increased and the protruding portion is used for rigidity in the vehicle body width direction. .

[0008]

In order to achieve the above-mentioned object, the present invention provides a pair of spaced-apart pairs on the outer periphery of a gear case through which a steering gear is inserted, in the vicinity where the steering gear and the steering rod are connected. In the steering gear mounting structure in which a flange is formed, an annular mount rubber is mounted between the pair of flanges, and the gear case is fixed to the vehicle body by a bracket that covers the entire mount rubber, the mounting rubber is provided on both sides of the mount rubber. It is characterized in that a protrusion margin capable of covering the tip end portion of the flange is provided, and bulging portions capable of press-contacting the protrusion protrusion margin with the tip end portion of the flange are provided at both edges of the bracket.

[0009]

The present invention is configured as described above, and by tightening the bracket, the tightening margin of the mount rubber is compressed, and along with this, the central portion of the mount is rolled and the protrusion margin is extended to form a pair of flanges. It will cover the tip. Further, the bulging portion of the bracket is clamped by sandwiching the mount rubber covering the tip of the flange with the tip of the flange.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, a rod-shaped steering gear 6 connected to the tie rod arm 4 is inserted into a gear case 7 and is movable in the vehicle width direction. A pair of flanges 9 and 9 are formed at intervals on the outer circumference of the gear case 7 in the vicinity where the steering gear 6 and the steering rod 8 are coupled to each other, and the outer peripheral surface is partially flat between the flanges 9 and 9. It is designed to prevent rotation of the shaft.

The annular mount rubber 10 mounted between the pair of flanges 9 and 9 has a length between the flanges 9 and 9 and can be expanded by a slit in the axial direction.
Protruding margins 14 having a length capable of covering the leading ends of the flanges 9 and 9 are provided on both edges of the flange 10. The protrusion margin 14 may be a shape in which it is straightly extended in a flange shape from both edges of the mount rubber 10, or may be a shape that covers the tip portions of the flanges 9 and 9 from the beginning as shown in FIG.

The bracket 11 has two protrusions 14, 14
A width B ₁ shorter than the length between the two, and a substantially arcuate contact surface 15 that abuts the peripheral surface of the mount rubber 10 excluding a partial flat surface,
The contact surface 15 has a mounting portion 17 having an opening 16 connected to the contact surface 15, and bulging portions 18, 18 that extend obliquely are provided on both edges of the contact surface 15. When the bracket 11 is mounted, the bulging portion 18 presses and holds the protrusion margin 14 with the tip of the flange 9. Reference numeral 19 is a vehicle body side bracket.

When fixing the gear case 7 to the vehicle body,
The two brackets 11 and 12 shown in FIGS. 3 and 4 are used to fasten and fix the gear case 7 at two positions. In the bracket 11 according to the present invention, as shown in FIG. 2, the tightening margin C of the portion pressed against the bracket 11 in the tightening process is compressed and rolled to cover the flange 9 portion together with the protrusion margin 14. Along with this, the bulging portion 18 causes the protrusion margin 14 to move to the flange 9
It will be clamped with the tip of the. The tightening margin D sandwiched by the bulging portion 18 is preferably smaller than the tightening margin C, and D <C <
It is efficient to manufacture and use a mount-shaped product such that = E.

In this way, the flange 9 portion formed on the gear case 7 can be firmly fixed, the rigidity in the vehicle width direction can be increased, and the displacement of the steering gear 6 can be prevented.
The steering stability can be improved. Further, the shape can be changed only by the bracket 11 and the mount rubber 10, so that the cost can be suppressed.

[0015]

Since the present invention is constructed as described above, the mount rubber can be mounted as usual to maintain a low vibration noise level, and the flange of the gear case can be bracketed by interposing the mount rubber. Since it is pressed by the bulging portion, steering rigidity and steering return characteristics can be improved and steering stability can be achieved.

[Brief description of drawings]

FIG. 1 is a development view showing a mounting structure of a steering gear according to an embodiment of the present invention.

FIG. 2 is a side view of the steering gear mounting structure shown in FIG. 1 when assembled.

FIG. 3 is a cross-sectional view of the steering gear mounting structure shown in FIG. 1 when assembled.

FIG. 4 is a cross-sectional view showing a mounting structure of another portion of the steering gear shown in FIG.

FIG. 5 is a sectional view of a conventional front wheel suspension assembly.

6 is a side view of a steering gear assembled with the suspension assembly shown in FIG.

FIG. 7 is a perspective view of a bracket for fixing the steering gear shown in FIG.

8 is a side view showing a state where the steering gear shown in FIG. 6 is fixed.

9 is a side view showing a state in which the steering gear shown in FIG. 6 is fixed by a narrow bracket.

[Explanation of symbols]

 6 Steering gear 7 Gear case 8 Steering rod 9 Flange 10 Mount rubber 11 Bracket 14 Protrusion margin 18 Swelling part

Claims (1)

[Claims] 1. A pair of flanges are formed at intervals on the outer periphery of a gear case, through which a steering gear is inserted, in the vicinity where the steering gear and the steering rod are connected, and an annular mount is provided between the pair of flanges. In a mounting structure of a steering gear in which rubber is mounted and a gear case is fixed to a vehicle body by a bracket that covers the entire mount rubber, a protrusion allowance is provided on both edges of the mount rubber to cover the tip end portion of the flange, and the bracket A steering gear mounting structure, characterized in that bulging portions are provided on both edges of the bulge so that the protruding portion can be pressed into contact with the front end portion of the flange.