JPS5846950Y2 - Steering column position adjustment device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a position adjustment device for a steering column of an automobile, and its purpose is to easily check the tightening after position adjustment.
The purpose is to prevent over-tightening.

Utility Application No. 53-136171 filed by the applicant of the present invention
In this issue, a steering column position adjustment device shown in FIG. 1 is proposed.

That is, a first column support 2 having a split groove 2a and a bolt hole 2b is fitted on the outer periphery of a steering column that is movable in the vertical and longitudinal directions, and the steering column 1 is positioned below the first column support 2. A guide hole 6 that is long in the front-rear direction is formed above a pair of left and right brackets 5, in which the second column support 3 having a sleeve 3a is fitted and is fixed to a fixed member such as a cab. Also, a bolt hole 7 is provided below, and this guide hole 5
A bolt 8 having a detent head 9 is inserted through the bolt hole 2b of the first column support 2, and the operation knob 1 is inserted.
At the same time, insert a bolt 11 into the lower bolt hole 7.
is inserted through the sleeve 3a of the second column support 3, and a nut 12 is screwed together.

In the adjustment device having such a structure, by loosening the tightening of the operation knob 10, the steering column 1 can slide on the first and second column supports 2 and 3, and the vertical position can be adjusted. When a force is applied to the column support 1 in the front-rear direction, the position in the front-rear direction can be adjusted around the bolt 11 of the second column support 3 and within the range allowed by the guide hole 6.

That is, there is an advantage that adjustment can be easily made by tightening or loosening the operation knob 10.

However, freight cars and the like are not always operated by one driver, so the position of the steering column is adjusted according to each driver's preference.

Therefore, there is a difference in the force with which each person tightens the operating knob 10, and some people may tighten the operation knob 10 strongly even though the tightening is sufficiently completed.

In such a case, even if the operator tries to loosen the operating knob 10 to make adjustments, it is not easy to loosen it because it is tightly crimped, and in some cases, a long-handled tool such as pliers may be used. If you don't hold it, it may not come loose.

The present invention has been improved in order to eliminate these problems, and includes an operating knob mechanism that allows the operator to confirm by sound and tactile sensation when a predetermined amount of tightening is completed.

Embodiments of the present invention will be described below with reference to FIGS. 2 and 3.

The main components other than the operation knob structure described below are based on the structure shown in FIG. 1 described above.

A sleeve 13 is integrally embedded in the operation knob 10.

A protrusion 13a is formed in the sleeve 13 and has a hole into which the bolt 8 is loosely inserted.

A cylindrical nut 14 whose front end abuts against this protrusion 13a is fitted into the sleeve 13, and whose rear end is collapsed by a snap ring 15.

Therefore, the cylindrical nut 14 is restrained from moving in the axial direction by the projection 13a and the snap ring 15, and is only allowed to rotate.

A large number of recesses 16 are formed radially on the outer peripheral surface of the cylindrical nut 14.

A steel ball 17 is fitted into one of the recesses 16 and pressed by a spring 18.

The set load of the spring 18 can be adjusted freely by a screw plug 19.

A cylindrical nut 14 is screwed into the operating knob 10 having the above structure onto a threaded portion of a bolt 8 having a head 9 with a rotation length tL as shown in FIG.

Therefore, when the operation knob 10 is rotated in the tightening direction, the bolt 8 and the operation knob 10 are relatively moved in the axial direction by the lead of the cylindrical nut 14 which is integral in the axial direction, and the bolt 8 and the operation knob 10 are tightened to the first column support 2. Gives force.

When a predetermined tightening force is reached and more tightening force is applied, the set load of the spring 18 becomes greater, so the spring 18 is bent and the steel ball 17 comes off from the recess 16, and the sleeve 1
3 idles, so no further tightening force is transmitted.

Also, at this time, a cut in which the steel ball 17 slides in the recess 15,
The device confirms that the specified amount of tightening has been completed with a clicking sound and the feeling of vibration transmitted to the hand.

The tightening torque can be increased or decreased by adjusting the strength of the set load of the spring 18 using the screw plug 19.

As described above, with this invention, the tightening force of the operating knob when adjusting the steering column vertically or longitudinally can always be obtained at a predetermined amount.
This has the advantage of eliminating the difficulty of loosening operations caused by unnecessary over-tightening, and increases the practicality of the adjusting device shown in FIG.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the entire device of the present invention, FIG. 2 is a cross-sectional view of the main parts of the present invention, and FIG. 3 is a cross-sectional view taken along the line ■-■ in FIG. 1... Steering column, 2... First column support, 3... Second column support, 5... Bracket, 6... Guide hole,
7...Bolt hole, 8...Bolt, 10
......Operation knob, 11...Bolt, 13
...Sleeve, 13a...Protrusion, 1
4...Tubular nut, 15...Snap ring, 16...Dent, 17...Steel ball, 18...Spring, 19 ...Screw plug.

Claims (1)

[Scope of utility model registration request] A first column support that can be tightened and loosely held is fitted onto the outer periphery of a steering column that is movable up and down as well as in the aforementioned directions, and the steering column can be slid in the axial direction from the first column support to a position in the F direction. A second column support to be held in the cab is fitted, and the second column support is fastened to a pair of left and right brackets fixed to the cab fixing surface using a bolt and an operation knob so as to be movable in the front and rear direction, and The second column support is fixed by a bolt and rotatably mounted around the bolt, and a sleeve is integrally provided with the operation knob, and movement in the axial direction is restricted within the sleeve, and movement in the rotational direction is limited. Fitting a permissible cylindrical nut, screwing the cylindrical nut onto the bolt, and forming radial recesses on the outer peripheral surface of the cylindrical nut;
A steering column position adjustment device comprising a steel ball pressed by a spring whose elastic force is freely adjustable by a screw plug is fitted into at least one of the recesses.