JPH05576B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a steering device including a non-rotating mechanism that maintains a mounting member such as a steering pad provided at the center of a steering wheel in a non-rotating state.

Prior Art As a conventional steering device equipped with a non-rotating mechanism, one disclosed in Japanese Utility Model Application Publication No. 57-163448 has been proposed. However, with this device,
First, the lower ring gear is attached to the end of the steering column, while the upper ring gear is attached to the mounting boss of the steering wheel. It is difficult to align the axes. A clearance may be provided between the second upper ring gear and the mounting surface of the mounting boss portion in order to ensure relative rotational freedom of the upper ring gear while taking into consideration the difference in expansion coefficients of both members. Therefore, the presence of this clearance causes rattling in the pulling ring gear.
Thirdly, since the planetary gears that mesh with the internal gears of both ring gears are screwed onto the mounting boss portion via a bracket, due to assembly errors, the rotating axes of both ring gears and the revolution axes of the planetary gears may There is a risk that there will be a mismatch.

Due to the above-mentioned reasons, there is a concern that the above-mentioned upper ring gear and its mounting members, such as parts that are attached to it and that are supposed to maintain a non-rotating state, may become rattled, resulting in a decrease in quality. It was hot.

OBJECTS OF THE INVENTION The present invention has been made in view of the current state of steering devices having such non-rotating mechanisms. A steering device that eliminates wobbling of members that should be maintained in a non-rotating state by firstly ensuring relative rotatability of both ring gears using bearings, and thirdly by attaching a planetary gear directly to the mounting boss. The purpose is to provide the following.

Structure of the Invention In order to achieve the above object, the present invention includes the following:
The lowering gear, which is fixed to the end of the steering column, and the upper ring gear, to which mounting members such as butts are attached, can rotate freely through bearings on the mounting boss of the steering wheel, which is fixed to the tip of the steering shaft. On the other hand, a bracket part is integrally molded on the mounting boss part, and the planetary gear that meshes with the internal gears provided on both the ring gears is supported by the bracket part.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. That is, as shown in Figures 1 and 2,
At the end of the steering column 2 through which the steering shaft 1 is inserted, a preamplifier 3 is attached with screws 4,
It is maintained by 4. The preamplifier 3 is equipped with a cancel mechanism sensor 5, and mounting holes 6, 6 are provided on the side surface of the tip end of the shaft 1.
On the other hand, a mounting boss portion 9 that is integral with the spokes 8 of the steering wheel 7 is firmly supported at the tip end of the steering shaft 1 by a nut 10.
The mounting boss portion 9 includes a disk portion 11 formed along the spoke 8, and a disk portion 11 formed along the steering shaft 1 at the center of both sides of the disk portion 11.
The cylindrical portions 12 and 13 have the same shape. The cylindrical parts 12 and 13 have bearings 14 and 1, respectively.
5, a lower ring gear 16 and an upper ring gear 17 are fitted to the outside so as to be relatively rotatable. Both ring gears 16, 17 are formed with internal gears 18a, 18b having the same diameter and the same number of teeth, and are prevented from coming off by snap springs 19, 20.

The lowering gear 16 includes projecting pieces 21, 21, and is rotationally locked to the end of the steering column 2 by fitting the projecting pieces 21, 21 into the assembly holes 6, 6. Mounting members such as a pad 22 and a switch mechanism 23 are attached to the upper ring gear 17.

On the other hand, a plurality of notches 24 are provided at equal intervals around the circumference of the disk portion 11. Also, this disc part 1
Bracket portions 25 and 26 are disposed opposite each other at appropriate intervals on both sides of the bracket 1 so as to bridge the notch portion 24 in the circumferential direction. The bracket parts 26, 26 are integrally molded with the disk part 11, and 25a, 26a are provided in the center part. A rotating shaft 27a of each planetary gear 27 is loosely inserted into the holes 25a, 26a, and the planetary gear 27 meshes with both the internal gears 18a, 18b.

Furthermore, a dust cover 2 is provided on the disk portion 11.
8, 28 and a contactor mounting bracket 29 are integrally molded. the dust cover 28,
28 is provided on the peripheral edge of the disk portion 11 and is located outside the ring gears 16 and 17, and the contactor mounting bracket 28 includes a contactor for electrically connecting both the ring gears 16 and 17. 30 is installed.

In this embodiment having the above configuration, the mounting boss portion 9 is closely fixed to the steering shaft 1, and the alignment of the axis with the shaft 1 is ensured. Therefore, both the ring gears 16 and 17 fitted into the cylindrical parts 12 and 13 of the mounting boss part 9 via the bearings 14 and 15 also ensure the alignment of their axes with the shaft 1. becomes.
Therefore, the coherence of the rotational axes of both ring gears 16 and 17 is inevitably ensured through the common element of coherence of the axes with the steering shaft 1. On the other hand, the planetary gear 27 is supported by bracket parts 25 and 26 that are integrally provided with the mounting boss part 9 whose axis is aligned with the steering shaft 1. Therefore, the axis of revolution of the planetary gear 27 coincides with the axis of rotation of both the ring gears 16 and 17 through the common element of coherence of the axis with the steering shaft 1. Therefore, the planetary gear 27 and each internal gear 1
The meshing state with 8a and 8b is uniform over the entire circumference, and even when the steering wheel 7 is rotated, the upper ring gear 17 and the pads 22 etc. attached to it are kept in a non-rotating state with high precision. can be maintained. In addition, bearings 15 and 16 are inserted between the mounting boss portion 9 and both ring gears 16 and 17, and the rotation of the bearings 15 and 16 provides sliding properties without creating a clearance between the two members. be able to. Therefore, due to the existence of the clearance, both ring gears 16,1
This eliminates the looseness of the pads 7, pads 22, etc., and improves the sense of quality.

Effects of the Invention As explained above, the present invention includes a lowering gear and an upper ring gear that are relatively rotatably fitted to the mounting boss portion of a steering shaft via bearings, and a bracket portion is fitted to the mounting boss portion of the steering shaft. Since they are integrally molded and the bracket supports the planetary gears that mesh with the internal gears provided on both ring gears, the rotation axes of both ring gears and the revolution axes of the planetary gears are aligned with the steering shaft. Due to the common element of the uniformity of the axes of
Consistency will be ensured. Therefore, the meshing state between the internal gear and the planetary gear formed on both ring gears can be made uniform over the entire circumference of the internal gear, and the engagement between the ring gear and the planetary gear, which should be maintained in a non-rotating state, can be made uniform. It is possible to eliminate rattling of the mounting member such as a pad to be mounted.

Furthermore, in the present invention, since a bearing is inserted between the mounting boss portion and both ring gears,
With this bearing, sufficient sliding performance can always be obtained without creating a clearance between the two members, and it is also possible to eliminate the above-mentioned wobbling of the members that should be maintained in a non-rotating state due to the presence of the clearance. can. Therefore, the quality of the steering device having such a non-rotating member can be dramatically improved.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line shown in FIG. 1. 1... Steering shaft, 2... Steering column, 7... Steering wheel, 9...
...Mounting boss part, 14, 15...Bearing, 16
... lowering gear, 17 ... upper ring gear, 18a, 18b ... internal gear, 21 ... pad, 23 ... switch mechanism (mounting member), 25,
26... Bracket portion, 27... Planetary gear.

Claims (1)

[Claims] 1. The lowering gear, which is fixed to the end of the steering column, and the upper ring gear, to which mounting members such as pads are attached, are rotated relative to each other through bearings on the mounting boss of the steering wheel, which is fixed to the tip of the steering shaft. What is claimed is: 1. A steering device characterized in that a bracket portion is integrally molded with the mounting boss portion, and a planetary gear meshing with an internal gear provided on both ring gears is supported by the bracket portion.