KR19980028805A - Steering Rack Gear Support Structure of Automobile - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering rack gear support structure of an automobile, wherein a rack gear installed in a steering gear box 1 is engaged with a pinion gear 2 that is integrally mounted to rotate in accordance with a steering wheel and is linearly movable horizontally. (3) is supported by an externally adjustable support, which is provided with a bush (4) with a groove into which the rack gear (3) is fitted, and a yoke with a groove so that the bush (4) is inserted and supported. (5), a spring (6) for elastically supporting the yoke (5), a yoke plug (7) for supporting the spring (6) while a screw is formed on the outer circumferential surface, and screwing the plug (7) In the steering rack gear supporting structure having a locking nut (8) which is fixed and adjustable, the sliding friction of the rack gear (3) on the inner surface of the bush (4) in close contact with the rack gear (3) The structure is characterized in that the plurality of balls (9) is mounted to reduce the The tightening torque of the locking nut is increased to ensure that the rack gear and the pinion gear are deeply engaged, thereby improving the bearing capacity of the rack gear and making the steering wheel lighter by minimizing the friction when moving the rack gear left and right. There is.

Description

Steering Rack Gear Support Structure of Automobile

The present invention relates to a steering rack gear support structure of an automobile, and in particular, a plurality of balls are mounted on an inner surface of a bush in which the steering rack gear is inserted and supported, thereby making the steering wheel lighter and smoother while making the steering wheel lighter. The present invention relates to a steering rack gear support structure of a vehicle that can be provided.

In general, a steering device of a vehicle is a device for steering in order to arbitrarily change the direction of movement of a vehicle. An operation consisting of a steering wheel, a steering shaft, a column, and the like for a driver to directly steer and transfer the operating force to a steering gear and a link. The gear and the gear unit to reduce the rotation of the steering shaft to increase the operating force and to change the direction of movement of the operating mechanism to the link mechanism, and to transmit the operation of the gear mechanism to the front wheels and to correctly support the relation positions of the left and right wheels It consists of a link mechanism consisting of a pitman arm, a drag arm, a knuckle arm and a tie rod.

Figure 1 shows the interior of the conventional steering gear box 1 constituting the gear device, that is, the pinion gear (2) mounted to the distal end of the steering shaft to be integrally rotated by the steering wheel operation; The rack gear 3 meshes with the pinion gear 2 to receive the rotational manipulation force of the steering wheel via the pinion gear 2 and linearly move left and right.

And the rack gear (3) is to be supported by a rack gear support mounted to protrude outwardly from the outside in the lower portion of the steering gear box (1) as shown in detail in Figures 1 and 2 The support is provided with a bush 4 having a groove into which the rack gear 3 is fitted, a yoke 5 with a groove formed so that the bush 4 is inserted and supported, and the yoke 5. Spring (6) to support elastically, the yoke plug (7) supporting the spring (6) while the screw is formed on the outer circumference, and the locking nut (8), which is screwed and adjustable to secure the plug (7) ) Has a structure with.

The rack gear 3 is engaged with the pinion gear 2 while being stably supported in the steering gear box 1 by the support configured as described above, and receives the rotational movement of the pinion gear 2 from side to side. It is supposed to move linearly.

When the locking nut 8 is rotated in the clockwise or counterclockwise direction to adjust the tightening torque with the plug 7, the steering handle can be lightly or heavily adjusted.

However, in the conventional rack gear supporting structure as described above, if the tightening torque of the locking nut is weakened, there is a defect that the play of the steering wheel is caused by the flow of the rack gear and the pinion gear, instead of lightening the operation feeling of the steering wheel. Contrary to the above, if the tightening torque is strengthened in order to solve this drawback, there is a drawback that the steering wheel's operation feeling becomes heavy, and it is not only difficult to make the proper driver feel the proper operation feeling depending on the speed of the vehicle, but also various incidental factors. Phosphorus devices were also needed.

Accordingly, the present invention has been devised to solve the above-mentioned drawbacks, and it is possible to reliably support the rack gear so that it can be stably engaged with the pinion gear as well as to reduce the friction during the left and right movement of the rack gear so that the steering moves smoothly and smoothly. The object of the present invention is to provide a steering rack gear support structure of a vehicle, which makes it possible to feel the handle operation lightly.

1 is a front view of a rack gear mounted in a steering gear box according to the prior art;

Figure 2 is an exploded perspective view of the rack gear support according to the prior art,

Figure 3 is an exploded perspective view of the rack gear support according to the present invention.

Explanation of symbols for the main parts of the drawings

1-steering gearbox 2-pinion gear

3-rack gear 4-bush

5-yoke 6-spring

7-Plug 8-Locking Nut

9-ball

The present invention for achieving the above object, the rack gear is installed in the steering gear box to be linearly movable left and right by engaging with the pinion gear mounted integrally rotated according to the steering wheel operation support that can be adjusted from the outside The support is supported by a bush having a groove into which the rack gear is fitted, a groove formed with a groove so that the bush is inserted, a spring supporting the yoke resiliently, and a screw formed on an outer circumferential surface of the spring. In a steering rack gear supporting structure having a yoke plug for supporting a lock and a locking nut for screwing and adjusting the plug, a plurality of balls are provided on an inner surface of a bush in close contact with the rack gear. It is a structure characterized by being mounted.

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

Figure 3 is an exploded perspective view of the rack gear support according to the present invention, the same reference numerals will be denoted in the same portion as the support according to the prior art shown in FIG.

That is, the support according to the present invention includes a bush 4 having a groove into which the rack gear 3 is fitted, a yoke 5 having a groove formed so that the bush 4 is inserted into and supported, and the yoke 5. Spring (6) to support elastically, the yoke plug (7) supporting the spring (6) while the screw is formed on the outer circumference, and the locking nut (8), which is screwed and adjustable to secure the plug (7) ) Has a structure with.

In addition, the rack gear 3 has a structure in which a plurality of balls 9 are mounted on the inner surface of the bush 4 close to each other.

Accordingly, the tightening torque of the locking nut 8 is strengthened so that the operation feeling of the steering wheel is felt lightly and lightly even when the rack gear 3 and the pinion gear 2 are deeply engaged, which means that the rack gear 3 is directly This is because a plurality of balls 9 are mounted on the inner surface of the bush supported by the contact.

That is, since the rack gear 3 is not in direct contact with the wide inner surface of the bush 4 as in the prior art but is in point contact with a plurality of balls 9, the rack gear 3 is soft while keeping the friction at a minimum when moving the rack gear. Since it can be moved smoothly, even if the rack gear and the pinion gear is deeply engaged by increasing the tightening torque, the steering wheel's operation feeling becomes light.

As described above, according to the steering rack gear supporting structure of the vehicle according to the present invention, the tightening torque of the locking nut is increased so that the rack gear and the pinion gear are deeply engaged, thereby improving the bearing capacity of the rack gear, and Minimizes friction when moving left and right, making it possible to make the steering wheel lighter.

Claims (1)

The rack gear (3) installed in the steering gear box (1) so as to be linearly movable left and right by being engaged with the pinion gear (2) which is integrally mounted according to the steering wheel's operation is supported by an externally adjustable support. The support is a bush 4 with a groove into which the rack gear 3 is fitted, a yoke 5 with a groove formed so that the bush 4 is inserted therein, and the yoke 5 is elastically supported. Spring (6), a yoke plug (7) supporting the spring (6) while a screw is formed on the outer circumferential surface, and a locking nut (8) screwed to the plug (7) and fixedly adjustable. In the steering rack gear supporting structure of the structure, a plurality of balls (9) for reducing the sliding friction of the rack gear (3) is mounted on the inner surface of the bush (4) in close contact with the rack gear (3) Steering rack gear support structure of automobile.