JP2598530Y2 - Vehicle steering column device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a vehicle steering column device.

[0002]

2. Description of the Related Art In a steering column device of a vehicle, a steering shaft on which a steering wheel is mounted is rotatably supported through a column tube, and steering operation is transmitted from a steering shaft to a steering gear box via a joint or the like. Then, the wheels are steered through the linkage by the steering gear box (see Japanese Utility Model Laid-Open No. 56-47171, etc.).

[0003] In this case, a rubber coupling is interposed between the steering shaft and the joint of the steering gear box in the passenger car to prevent transmission of unpleasant micro-vibration (kickback) from the road surface to the steering wheel. There is something.

[0004]

However, in the case where a spline portion is provided between the steering shaft and the steering gear box in order to absorb a stroke during cab tilt, cab suspension, and telescoping as in a cab overtrack. However, due to the layout, there was a problem that the rubber coupling could not be mounted.

The purpose of the present invention is to solve such a problem.

[0006]

Therefore, a plurality of stopper grooves extending in the axial direction are formed on the inner periphery of the sleeve,
The steering shaft that rotatably penetrates the column tube is divided, and a plurality of protrusions that can loosely fit into the stopper groove on the inner circumference of the sleeve and transmit torque are formed at the ends of both shafts
And the axial movement of both shafts in the center of the sleeve.
And a stopper groove on the sleeve.
A rubber is attached to the inner periphery including both ends of the shafts including the protrusions, and the shafts are coaxially connected via a sleeve between the rubbers.

[0007]

[Function] The steering shaft is inside the column tube.
And both shafts are threaded at their ends.
By fitting to the inner circumference on both sides sandwiching the throttle part of the probe,
The rubber is coaxially connected via a sleeve between. S
Leaves have no joints such as welding to both shafts
However, relative movement with both shafts due to the central throttle part
It is regulated, and the connection state of both shafts can be maintained well.
Even if the rubber of the sleeve is worn, the projections
The steering force (turning) between the shafts.
Rolling force) can be transmitted reliably. Spline between steering shaft and steering gearbox
And it is difficult to secure space for the rubber coupling
Even in the case of a large car with overdrive , minute vibrations from the road surface are absorbed by the rubber of the sleeve, and can be effectively prevented from being transmitted to the steering wheel.

[0008]

1 to 4 show an embodiment of the present invention.
Reference numeral 10 denotes a steering shaft on which a steering wheel is mounted at an upper end, and reference numeral 11 denotes a column tube that supports the steering shaft 10 so as to freely rotate.

The steering shaft 10 is divided into two parts in a column tube 11, which are connected by a column damper 13.

The lower end of the steering shaft 10 is connected to a steering gear box 17 via a joint 14, a spline section 15, and a joint 16, and is connected from the steering gear box 17 to a wheel-side linkage (not shown).

The column damper 13 comprises a sleeve 19 having a predetermined rubber 18 mounted inside. Sleeve 19
In the figure, a narrowed portion 20 is formed in the center, and four stopper grooves 21 are formed in the inner circumference on both sides.

The rubber 18 is fitted on the inner periphery of the sleeve 19 and has a cross-shaped hole 22 corresponding to the stopper groove 21 of the sleeve 19. In this case, rubber 18
Is formed so as to cover up to the throttle unit 20. The rubber 18 is provided on both sides of the sleeve 19,
It can be a one-piece connection.

The two divided ends 23 of the steering shaft 10 are respectively formed in the same cross shape in the holes 22 of the rubber 18. In this case, the outer diameter of the cross portion of the end 23 of the shaft 10 is larger than the inner diameter of the sleeve 19 together with the outer diameter of the cross portion of the hole 22 of the rubber 18, that is, the free end of the shaft 10 excluding the rubber 18. It is formed so as to be able to transmit the rotational force even in the fitted state.

The rubbers 18 on both sides of the column damper 13
The two ends 23 of the steering shaft 10 are inserted into and connected to the holes 22.

The column tube 11 has an upper end and a lower end and a steering shaft 1 just above the column damper 13.
The bearings 24 are provided on the shaft 10 to prevent the snap ring 2 from coming off.
5 is attached.

Reference numeral 26 denotes a column support.

As described above, the column damper 1 comprising the rubber 18 and the sleeve 19 in the middle of the steering shaft 10
The vibration transmitted from the road surface via the steering gear box 12, the joint, and the like is absorbed by the column damper 13 and is prevented from being transmitted to the steering wheel. Further, noise from the gear box side is reduced.

Because of the columnar damper 13 in the form of a sleeve, the column damper 13 is provided without any space in the middle of the steering shaft 10, and can be easily mounted even in a cab-over vehicle having a spline portion 15 below the steering shaft 10.

Since the outer diameter of the cross portion of the end portion 23 of the steering shaft 10 is formed larger than the inner peripheral diameter of the sleeve 19, even if the rubber 18 is worn, the rotational force of the shaft 10 is transmitted reliably.

Although the stopper groove 21 of the sleeve 19, the hole 22 of the rubber 18, and the end 23 of the shaft 10 are formed in a cross shape, they may be formed in a star shape, a gear shape or the like.

[0021]

In summary, according to the present invention, a plurality of stopper grooves extending in the axial direction are formed on the inner periphery of the sleeve, while the steering shaft which rotatably penetrates the column tube is divided, and the ends of both shafts are divided. A plurality of protrusions that can loosely fit into the stopper groove on the inner circumference of the sleeve and transmit the rotational force are formed at the center of the sleeve.
Provided with a throttle portion for restricting the can, stopper sleeve
Attach the rubber that closely fits the ends including the protrusions of both shafts to the inner circumference including the groove, and insert the rubber between the sleeves
The two shafts are connected coaxially , ensuring reliable transmission of steering force even when there is no space between the steering shaft and the steering gear box.
In addition, the transmission of unpleasant vibrations from the road surface to the steering wheel can be effectively prevented .

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment.

FIG. 2 is a perspective view of a sleeve.

FIG. 3 is a perspective view of a shaft end.

FIG. 4 is a sectional view of a sleeve.

[Description of Signs] 10 Steering shaft 11 Column tube 13 Column damper 14 Joint 15 Spline part 17 Steering gear box 18 Rubber 19 Sleeve 20 Restrictor 21 Stopper groove 22 Hole 23 End part 24 Bearing 25 Snap ring

Claims (1)

(57) [Scope of request for utility model registration] A plurality of stopper grooves extending in an axial direction are formed in an inner periphery of a sleeve, and a steering shaft which rotatably penetrates a column tube is divided, and the inside of the sleeve is formed at an end of both shafts. A plurality of protrusions that can loosely fit and transmit rotational force are formed in the peripheral stopper groove, and both
When a throttle portion is provided to restrict the axial movement of the shaft, the protrusions of both shafts are provided on the inner periphery including the stopper groove of the sleeve.
A steering column device for a vehicle, wherein a rubber for tightly fitting an end portion including a raised portion is attached, and both shafts are connected coaxially via a sleeve between the rubbers.