JPH02102869A - Steering wheel device - Google Patents

Abstract

PURPOSE:To prevent noise and vibration from occurring by constituting a soft elastic member to be interposed between a first gear at the steering column side and a second gear at the steering pad side as well as between two planetary gear parts. CONSTITUTION:A first gear 17 is attached to a steering column 10 to be set as a part of a car body by a bolt 9, and a second gear 21 is inserted into an arm shaft part 15 of a steering wheel in the state that its axial movement is regulated. Then, a steering pad 20 provided with various switches 18 is attached to this second gear 21. Each of these gears 17, 21 is made up of sticking and fixing ring parts 22, 23 formed with teeth 23a by a lot of through holes 24 installed along the circumferential direction at regular intervals, and a strip soft elastic member 25 arranged in their inner circumferential parts so as to close these through holes 24. Under this constitution, plural numbers of planetary gear parts 30 are engaged at the inner circumferential side of these gears 17, 21.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides a steering pad that is located in the center of a steering wheel body so that it remains stationary even when the steering wheel body is rotated. This invention relates to a steering wheel device.

(Prior art) As one of the steering wheel devices installed in a vehicle, a steering pad located in the center of the steering wheel body is equipped with a switch for constant speed running, etc., and the steering wheel body rotates. There are known devices that remain stationary even when forced to do so. In such a steering wheel device, -fb includes a steering column side sun gear fixed to the vehicle body, and a steering column side sun gear closer to the steering wheel body than the steering column side sun gear, as shown in Japanese Patent Application Laid-open No. 59-118547, for example. From the steering pad side sun gear which is arranged coaxially with the steering column side sun gear at the position of and to which the steering pad is attached, and the planetary gear meshed with both the steering column side sun gear and the steering pad side sun gear. It has a steering pad non-rotation mechanism. In such a non-rotating mechanism, when the steering wheel body is rotated, the planetary gear rotates along with the rotation and revolves along the steering column side sun gear and the steering pad side sun gear. Therefore, the sun gear on the steering pad side is not rotated, so that the steering pad remains stationary.

(Problem to be Solved by the Invention) In the steering wheel device having the steering pad non-rotating mechanism as described above, C is a back-up between the steering column side sun gear and the steering pad side sun gear and the planetary gear. Since a lash is formed, due to the formation of such a backlash,
There is a problem in that vibration and noise are generated when the planetary gear rotates and revolves. In order to deal with this problem, for example, in the steering wheel device shown in the above-mentioned publication, 't! A biasing means is provided for biasing the star gear against each of the steering column side sun gear and the steering pad side sun gear.

However, when such a biasing means is provided, the structure of the steering wheel device becomes complicated, and high processing accuracy is required for the two sun gears and the planetary gears, which increases manufacturing costs. There is a risk that it will become bulky.

In view of these points, the present invention solves the problem that the steering pad is made to remain stationary even when the steering wheel body is rotated, but the structure is complicated, or the first and second gears are , and i! When the planetary gear part rotates and revolves around its axis without the inconvenience of requiring high machining accuracy for the 12-legged gear part, the rotation of the first and second gears and the 't1 leg type gear part. An object of the present invention is to provide a steering wheel device in which vibration and noise caused by backlash formed between steering wheels are prevented from occurring.

(Means for Solving the Problems) In order to achieve the above-mentioned object, a steering wheel device according to the present invention includes a steering wheel body coupled to a steering shaft, and a steering wheel body that surrounds the steering shaft. a first gear fixed to a steering column passing through the gear;
The first gear is located between the gear and the steering wheel body.
A second gear is disposed coaxially with the first gear, the steering pad is removed, and the rotation of the steering shaft is not transmitted, and the second gear meshes with both the first and second gears. It is equipped with an N star gear part that rotates on its axis and revolves along the first and second gears as the wheel body rotates, and each of the first and second gears has a plurality of planetary gear parts meshing with each other. The recesses or through holes are configured to have an annular part and a soft elastic member arranged at equal intervals along the circumferential direction, and the soft elastic member is configured to cover at least a part of the large number of recesses or through holes in the annular part. It is assumed that this is to be closed from the planetary gear part side.

(Function) In the steering wheel device according to the present invention configured as described above, there is a gap between the annular portion and the planetary gear portion where the teeth of each of the first and second gears are provided. Since a soft elastic member is interposed in the steering wheel body, it is possible to avoid backlash from being formed between each of the first and second gears and the planetary gear portion. It is possible to prevent noise and vibration from being generated when the planetary gear portion rotates and revolves due to rotation.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show main parts of an example of a steering wheel device according to the present invention. In FIGS. 1 and 2, the inner periphery of the steering shaft 12 that passes through the steering column 10, which is part of the vehicle body, is the outer periphery of the steering shirt 1-12. An arm shaft portion 15 spline-coupled to is fixed by a nut 16. The arm shaft portion 15 is provided with three arms 15a whose tip portions are bent upward in FIG. 1, and the tip portions of each arm 15a are attached to the steering wheel body 14. There is. A steering column side gear (hereinafter referred to as a first gear) 17 is connected to the steering shaft 12 in the steering column 10.
A steering pad side gear (hereinafter referred to as the second gear) 21 is fitted into the arm shaft portion 15 with its movement in the axial direction being restricted. A steering pad 20 is attached to the second gear 21 and is provided with various switches 18 such as a constant speed running switch.

The first gear 17 and the second gear 21 are provided with annular portions 22 and 23, respectively. As shown in FIG. 3, the annular portion 23 of the second gear 21 has a tooth portion 23a formed by a large number of through holes 24 provided at equal intervals along the circumferential direction, and further has a tooth portion 23a formed on the inner circumference. A band-shaped soft elastic member 25 is placed in the section so as to close the through hole 24.
A long hole 25a extending in the width direction is formed in a portion of the soft elastic member 25 corresponding to the center of each through hole 24. on the other hand,
The annular portion 22 of the first gear 17 has the same configuration as the annular portion 23 of the second gear 21 .

Moreover, a plurality of planetary gear parts 30 are disposed on the inner peripheral side of each of the first gear 17 and the second gear 21.

The planetary gear section 30 is attached to each of the three arms 15a, and as shown in FIG. 27 (hereinafter referred to as a second planetary gear). The tooth portion 26a of the first planetary gear 26 and the second planetary gear 2
The peak portions 27a at 7 are meshed with the tooth portions 22a of the first gear 17 and the tooth portions 23a of the second gear 21 via the soft elastic member 25, respectively. 1st
The planetary gear 26 and the second planetary gear 27 have the same specifications such as the number of teeth, and are fitted onto the support shaft 28, so that they rotate together. The support shaft 28 is rotatably supported by a bracket 29 attached to each arm 15a.

In the steering wheel device having such a configuration, when the steering wheel body 14 is rotated, the first 't1 star gear 26 and the second planetary gear 27 rotate on their own axis as the steering wheel body 14 rotates. At the same time, the peak portion 22a of the first gear 17 and the second gear 21
The first gear 17 revolves along the toothed portion 23a.
is fixed to the vehicle body, and the first planetary gear 26 and the second planetary gear 27 have the same specifications such as the number of teeth and are configured to rotate together. The second gear 21 is not rotated, so the steering pad 20 attached to the second gear 21 remains stationary even if the steering wheel body 14 is rotated. In this case, the tooth portion 26a of the first planetary gear 26 and the mountain portion 27a of the second planetary gear 27
are engaged with elongated holes 25a formed in the soft elastic member 25 to push the soft elastic member 25 into the through holes 24.
By being meshed with the crest 23a of the gear 21, the gap between the ridge 26a of the first planetary gear 26 and the tooth 22a of the first gear 17 and the second
It is possible to avoid backlash from being formed between the peak 27a of the planetary gear 27 and the peak 23a of the second gear 21.

In the above example, the annular portions 22 and 23 of the first gear 17 and the second gear 21 are provided with the through holes 24 to form the tooth portions 22a and 23a, but the present invention The steering wheel according to the above does not necessarily have to be configured in this way, for example, the annular portions 22 and 2 of the first gear 17 and the second gear 21, respectively.
3 may be provided with a recess opening toward the first planetary gear 26 and second planetary gear 27 instead of the through hole 24.

Further, the soft elastic member 25 does not need to be in the shape of a band as described above, and the through holes '24 provided in the annular portions 22 and 23 of the first gear 17 and the second gear 21, respectively.
Alternatively, it may be formed into a plurality of strips corresponding to each of the recesses or to each of a plurality of sets.

(Effects of the Invention) As is clear from the following description, according to the steering wheel device according to the present invention, the first and second gears, and
The planetary gear has a relatively simple structure in which a soft elastic member is interposed between each of the first and second gears and the planetary gear, without inconveniences such as requiring high machining accuracy for the planetary gear. , backlash is prevented from being formed between each of the first and second gears and the planetary gear, and when the planetary gear rotates and revolves, vibration and noise due to backlash are prevented from occurring. It can be prevented.

[Brief explanation of drawings]

1 and 2 are a schematic front view and a schematic plan view showing an example of a steering wheel device according to the present invention, and FIG. 3 is an enlarged view showing a main part of the example shown in FIG. 1. In the figure, 10 is a steering column, 12 is a steering shaft, 14 is a steering wheel body, 15 is an arm shaft portion, 17 is a first gear, 20 is a steering band, 21 is a second gear, and 22 and 23 are annular shapes. part, 2
4 is a through hole, 25 is a soft elastic member, 26 is a first planetary gear, 27 is a second planetary gear, and 30 is a planetary gear portion. Patent applicant Mazda Motor Corporation

Claims (1)

[Claims] a steering wheel body coupled to a steering shaft; a first gear surrounding the steering shaft and fixed to a steering column through which the steering shaft passes; the first gear and the steering wheel body; The above first position is between
A second gear is disposed coaxially with the gear, a steering pad is attached, and the rotation of the steering shaft is not transmitted, and the second gear meshes with both the first and second gears, and the steering wheel A planetary gear portion that rotates on its axis and revolves along the first and second gears as the main body rotates, and the planetary gear portion meshes with each of the first and second gears. Consisting of an annular portion in which a large number of recesses or through holes are arranged at equal intervals along the circumferential direction, and a soft elastic member that closes at least a portion of the large number of recesses or through holes from the planetary gear portion side. A steering wheel device characterized by: