JPS6215096Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a vehicle steering system in which the front surface of the steering wheel, that is, the center thereof, is always fixed against rotation of the steering wheel.

Generally, the front portion of the steering wheel is located at the most visible position for the driver in terms of visibility and operation. Therefore, for example, meters,
Providing indicators, buffer members, etc. is most effective in ensuring driving safety. However, since this front part rotates together with the wheels, it has been impossible to arrange instruments thereon. In addition, a slip ring must be provided in the middle of the wiring for the horn switch provided at the center of the wheel, resulting in a complicated structure and high cost. In order to improve this, there have been proposals to connect the wheel and its front part, that is, the central shaft, with a planetary gear, etc., and to transmit the rotation of the wheel to the shaft while a part of the gear is fixed. The mechanism was complicated and the price was high. Furthermore, there is a system in which the steering wheel is fitted into a cylinder fitted with a gear, and the steering shaft is operated via the gear (Japanese Patent Application Laid-Open No. 57-60968), but this is difficult to handle due to space management in a narrow driver's seat. , becomes very inefficient. Therefore, the object of this invention is to eliminate the above-mentioned drawbacks and utilize the front surface of the wheel effectively with a simple structure.

This invention will be explained below with reference to embodiments shown in the drawings. Reference numeral 1 denotes an outer cylinder fixed to the vehicle body, and a spiral groove 1a is bored in the circumferential surface of the outer cylinder. A pillar portion 9 is fitted into the spiral groove 1a, and the spiral grooved outer cylinder 1 is fitted with the pillar portion 9.
The inner rotating body 2 and the outer rotating body 7, which are respectively inserted into the inner and outer sides of the rotary body, are integrally connected. The inner wall of the inner rotating body 2 and the outer periphery of the shaft 4 disposed inside the inner wall are connected to each other by a spline 13. Similarly, the outer periphery of the outer rotating body 7 and the inner wall of the steering column portion (cylindrical portion) 3 integral with the steering wheel 5 are connected to each other by splines 12. Steering column part 3
is supported on the outer cylinder 1 by a thrust bearing 8 provided in the outer cylinder 1, and the shaft 4 is supported by a radial bearing 14 provided in the outer cylinder 1. The outer peripheral surface has a flange portion 6 at one end.
The wiring 10 connected to the instruments 11 arranged in is wound to the required location.

Since the embodiment of this invention has the above-mentioned configuration, when the driver grips and rotates the steering wheel 5, the steering column 3 integrated therewith also rotates by the thrust bearing 8. This rotation is transmitted to the outer rotating body 7, the column part 9, and the inner rotating body 2. As a result, the outer rotating body 7 rotates integrally with the inner cylinder part 3 of the wheel 5, and is rotated along the spline by the pillar part 9 that fits into the spiral groove 1a of the spiral grooved outer cylinder 1. slide in the direction. This sliding and rotation is
The inner rotating body 2 that is integrally coupled is slid and rotated in the same direction, but since the shaft 4 and the inner rotating body 2 are spline-coupled, the shaft 4 rotates but does not move along the axis. As a result, only the rotation of the steering wheel 5 is transmitted to the shaft 4, and the spiral grooved outer cylinder 1 into which the shaft 4 is fitted neither rotates nor slides. If any electrical equipment 11 is placed at the upper end of this outer cylinder 1 via the flange 6, this part will remain stationary regardless of the steering wheel, so the front part of the steering wheel can be used effectively. It will become.

As mentioned above, this invention can reliably hold the front, or center, of the steering wheel in a fixed state at all times, so the front can be used effectively, and the structure is simple and easy to assemble. It has the advantage of being mass-produced at low cost.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of an embodiment of this invention;
The figure is a cross-sectional view thereof. 1... Outer cylinder with spiral groove, 2... Inner rotating body, 3...
Steering column part, 4... Shaft, 5... Steering wheel, 6... Flange part, 7... Outer rotating body, 8... Thrust bearing, 9... Pillar part, 10
...Wiring, 11...Electrical equipment, 12, 13...Key, 14...Radial bearing.

Claims (1)

[Scope of utility model registration request] Two inner and outer rotating bodies are inserted into the inner and outer sides of the outer cylinder with a spiral groove, and are connected together by a column that fits into the spiral groove, and the inner wall and shaft of the inner rotating body and the outer wall of the outer rotating body and A vehicle steering device in which an inner wall of a steering column is fitted to each other so that they are locked in the rotational direction and movable relative to each other in the axial direction.