SU975483A2 - Vehicle steering mechanism - Google Patents

Description

(54) TRANSPORT STEERING MECHANISM

one

This invention relates to a transport engineering, in particular, to the steering mechanisms of vehicles.

According to the main author. St. No. 931560 is known for a steering mechanism comprising a housing with covers, a nut-rail connected by screw ball joints with a steering shaft mounted in the bearings of the housing, and a gear sector located in installed in the housing with the possibility of eccentric bushings mounted on the ends of which are made The holes are located concentrically on the inner surface of the bearing, and in the covers fixedly mounted on the housing there are pins for interaction with the holes and between the end surfaces of the sector and the sleeves. installed thrust washers 1.

The disadvantages of a conventional steering mechanism include the appearance of the play of the steering shaft during axially mixing the sector due to the wear of the stop rings, the ends of the sector.

The purpose of the invention is to increase reliability by eliminating the play of steering gear.

shaft during operation limiting the axial movement of the sector.

This goal is achieved by the fact that the steering mechanism is provided with a gap compensator installed in the housing of the steering mechanism 5 between the cover and the eccentric bushing with the possibility of interaction in the axial direction with the end surface of the last topic.

In addition, the compensator is made in the form of a set of elastic washers.

In this case, the compensator is made in the form of a nut with an external thread, installed with the possibility of interaction with an internal thread, made on the body.

FIG. 1 shows the design of the steering mechanism with a compensator in the form of a nut; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows the node I in FIG. one; in fig. 4 - steering gear with a compensator in the form of a set of washers.

20

The steering mechanism includes a nut-rail 1 connected by a screw connection including circulating balls 2, with a steering shaft 3 installed in the bearings of the housing 4, a cylindrical sector 5,

connected by an adjusting device, including sliding bearings 6, in which the inner surface is eccentrically displaced relative to the outer sleeve 7 with a series of holes 8 at the ends, pins 9 installed in the covers 10 and 11, and entering the holes of the sleeves 7. From axial displacement 5 is supported by retaining rings 12.

Between the lid 11 and the eccentric sleeve 7 in the housing 4 is installed a compensator in the form of a nut 13, which interacts with the end of this sleeve in the axial direction. The nut 13 is locked by a pin 14 entering into the opening of the cover 11 and one of the holes in the end face of the nut 13.

The nut 13 (FIG. 3) can be locked with a screw 15 screwed into the housing 4 as far as it will go, with locking, for example, in the form of a core.

The compensator can also be made in the form of a set of washers 16 (Fig. 4).

When the steering shaft 3 is rotated, due to the screw connection, including the circulating balls 2, the nut rail 1, moving in axial direction, rotates the toothed sector 5 in the sliding bearings 6. The torque applied to the steering shaft is transmitted to the sector shaft. The increase in torque on the sector shaft is due to the gear ratio of the screw joint.

The gap in the gearing is adjusted by turning the sleeves 7 in the housing 4 to match the like holes 8 with the pin on the covers. Together with the bushings 7, the sliding bearings 6 are rotated. Since the inner surfaces of the bearings are eccentrically shifted relative to the outer, when the sleeves 7 rotate, the center-to-center distance between sector 5 and the nut 1 increases or decreases depending on the direction of rotation.

In addition, at the same time, due to the friction forces in the screw connection, the nut-rail 1 tends to turn around the axis of the steering shaft 3, pressing sector 5 to the one of the stop rings 12 via gearing, depending on the direction of rotation.

The toothed sector 5 presses against the thrust rings 5 also when it is subjected to forces from the bipod of the steering mechanism. The gap between the stop rings 12, the sleeves 7 and sector 5 is eliminated by

screwing the nut 13 in the housing 4 up to the stop with the lid 10 fixed. Then, unscrew the nut 13 until the pin 14 on the lid II coincides with the nearest hole on the end of this nut (Fig. 1, 2

and 4) or by installing or adding washers 16. After adjusting the gaps, the cover 11 is fixed to the housing 4.

The invention will provide improved traffic safety as well as allow compliance with international requirements in terms of

ensuring the limitation of the greatest play of the steering wheel in the steering of vehicles over the entire service life of the steering mechanism.

Claims (3)

1. The steering mechanism of the vehicle auth. St. No. 931560, characterized in that, in order to increase reliability by eliminating the play of the steering shaft during operation by limiting the axial movement of the sector, it is equipped with a gap compensator installed in the steering gear case between the cover and the eccentric bushing with  interaction in the axial direction with the end surface of the latter. 2. The mechanism according to claim 1, characterized in that the compensator is designed as a set of elastic washers. 3. The mechanism according to claim 1, characterized in that the compensator is made in the form of a nut with external thread, installed with the possibility of interaction with internal thread, made on the body. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 931560, cl. In 62 D 3/02, 1976 (prototype).