KR20060101984A - Mounting bush for steering gear housing of automobile - Google Patents

Abstract

The present invention relates to a mounting bush required for fixing a steering gearbox housing of a vehicle to a vehicle body, which in particular improves the existing simple cylindrical mounting bush to improve the support rigidity and flexibility of the steering gearbox according to the actual vehicle mounting situation. And a mounting bush of the steering gear housing.

The configuration of the present invention is a mounting bush of a steering gear housing which is made of a cylindrical bush and a rubber which is vulcanized and bonded to the metal bush, and is mounted in a mounting hole provided in the housing of the gear box. In the long axis direction of the ellipse to reinforce the support stiffness through the thickness of the bush, the shorter direction of the ellipse is characterized in that the more rubber is vulcanized and configured to reinforce the flexibility.

Steering, gearbox, mounting hole, bush, rubber,

Description

Mounting Bush for Steering Gear Housing of Automobile}

1 is a perspective view showing a conventional steering gear box.

2 is a view showing a conventional mounting bush.

Figure 3 is a cross-sectional view showing a mounting bush according to the present invention.

4 is a view showing a steering gear box to which the present inventor's mounting bush is applied.

<Explanation of symbols for the main parts of the drawings>

100 ... gear box housing

200 ... mounting bush

210 ... Bush

220 ... rubber

The present invention relates to a mounting bush required for fixing a steering gearbox housing of a vehicle to a vehicle body, which improves the support rigidity and flexibility of the steering gearbox according to the actual vehicle mounting situation by improving the existing simple cylindrical mounting bush. And a mounting bush of the steering gear housing.

A steering device of a vehicle is a device for changing a driving direction of a vehicle as desired by the driver, and an alternative configuration thereof includes a steering wheel provided in the driver's seat, a steering shaft connected to the lower side of the steering wheel, and the steering shaft. It consists of a gear box connected to switch the direction of power transmission.

In particular, the gear box is provided with a hollow long housing so that the rack bar can be installed, the pinion is inserted into the middle portion of the gear box to move the rack bar to the left and right as the pinion rotates in engagement with the rack gear of the rack bar.

On the other hand, such a gear box is fixed to the vehicle body, as shown in Figure 1, the mounting bracket 11 is provided in the housing 10 of the gear box (G), the mounting bracket 11 is a mounting hole 11a is formed so that the gear box G is fixed to the vehicle body side through the fastening member (not shown) through the mounting hole 11a.

However, since the gear box G as described above is connected to the steering wheel of the driver side through the steering shaft, the vibration of the vehicle body side is transmitted to the driver through the steering wheel when the vehicle is running. Accordingly, in order to reduce such vibration, a rubber mounting bush 20 having excellent vibration absorption function is installed in the mounting hole 11a.

2 is a plan view and a side cross-sectional view showing a conventional mounting bush shown in FIG.

As can be seen in the figure, the conventional mounting bush 20, the metal bush 21 made of a cylindrical shape so that the bolt can penetrate therein, and the vulcanization adhesion to the outer peripheral surface of the metal bush 21 It consists of the rubber | gum 22 which wears.

In particular, the rubber 22 is made of a diameter in close contact with the mounting hole (11a), and both ends form a toll portion so as to extend slightly to the outside of the mounting hole (11a in Figure 1), using an indenter during assembly Pressing the mounting hole 11a prevents the protrusion from being caught by the mounting brackets around the upper and lower ends of the mounting hole.

The mounting bush 20 installed as described above absorbs or alleviates the vibration of the vehicle transmitted from the vehicle body by the rubber 22 adhered to the outer circumferential surface of the metal bush 21 so that the gearbox is not unreasonable and vibrates toward the driver side at the same time. This will prevent it from being delivered.

However, in the related art, since the mounting bush is made of a simple cylindrical metal bush and rubber, when the gear box is fixed to the vehicle body by passing a bolt or the like into the mounting bush, sufficient support rigidity for the operation direction of the gear box is secured or There was a problem that sufficient flexibility with respect to the vehicle traveling direction could not be secured.

That is, the conventional mounting bush is configured to have the same shape and cross-sectional diameter in the X, Y axis direction as shown in Fig. 2, so that the X-axis direction (left and right movement direction of the rack bar in the gear box) and the Y axis at the time of installation The support stiffness and flexibility in the direction (total length of the vehicle) are the same, so that the degree of support stiffness and flexibility with respect to the operating direction of the load cannot be realized according to the mounting situation of the device.

The present invention has been made to improve the conventional problems as described above, the object is to improve the structure of the mounting bush consisting of a conventional simple cylindrical metal bush and rubber, in the longitudinal direction of the gear box when mounting the vehicle Is to provide a mounting bush of a steering gear housing that can have sufficient support rigidity and sufficient flexibility in the vehicle's full length direction.

The mounting bush of the steering gear housing according to the present invention for achieving the above object is made of a cylindrical bush and a rubber which is vulcanized to the metal bush of the steering gear housing that is press-installed in the mounting hole provided in the housing of the gear box In the mounting bush, the outer diameter of the bush is formed in an elliptical shape to reinforce the supporting rigidity through the thickness of the bush in the long axis direction of the ellipse, and more rubber is vulcanized in the short axis direction of the ellipse to be flexible. It features.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a cross sectional view showing a mounting bush according to the present invention, wherein the mounting bush 200 of the present invention has a bush 210 having a bolting hole and a vulcanization adhesive bond to the outside of the bush 210. It consists of a rubber 220 to be worn.

In particular, the present invention, the outer surface of the bush 210 is formed in an elliptical shape, the thickness of the bush is reinforced in the long axis direction of the ellipse, more rubber 220 in the short axis direction to the structure that can be vulcanized It is characteristic that it was made.

That is, when the outer surface of the bush is formed as an ellipse, as can be seen through the illustrated figure, the thickness of the bush 210 is reinforced in the long axis direction of the ellipse (X-axis direction of the drawing) to support the bolt when mounting the actual vehicle. Rigidity is improved, and more rubbers 220 are vulcanized in the short axis direction of the ellipse (in the Y-axis direction of the drawing), thereby improving flexibility and impact absorption performance.

In the mounting bush 200 of the present invention having such a structure, as shown in FIG. 4, the elliptical long axis of the bush 210 when pressed into the mounting hole 110 is a longitudinal axis of the gear box housing 100. And the short axis is installed so as to face in a direction perpendicular to the axis of the gear box, that is, in the full length direction of the vehicle. This is in many ways the direction in which the axial support stiffness of the gear box housing 100 is required for rack bar operation in the gear box housing 100 and the direction in which more flexibility of the device is required when rotational torque is transmitted to the rack bar. Considered.

Therefore, the mounting bush applied to the present invention, the outer surface of the bush is formed in an oval shape, the thickness of the bush 210 is made in the long axis direction of the ellipse to improve the longitudinal support rigidity of the gear box housing 100 after mounting In the shorter direction of the ellipse, more rubbers 220 are vulcanized and secured to sufficient flexibility, thereby improving on center feel and torque effort.

As described above, the mounting bush of the steering gear housing according to the present invention, the bush having an elliptical outer circumferential surface, the thickness of the bush is reinforced in the long axis direction of the ellipse to sufficiently secure the support rigidity against the load direction of the gear box load In the short axis direction, more rubbers are vulcanized and bonded, thereby improving flexibility and thereby improving on-center fill of the vehicle.

Claims (1)

In the mounting bush of the steering gear housing consisting of a cylindrical bush and a rubber vulcanized to the metal bush, which is press-fitted into the mounting hole provided in the housing of the gear box, The outer diameter of the bush to form an elliptical steering gear characterized in that the reinforcing support stiffness through the thickness of the bush in the longitudinal direction of the ellipse, and more rubber is vulcanized in the short axis direction of the ellipse to enhance the flexibility Mounting bush in the housing.

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