JPS6218121Y2 - - Google Patents

Description

[Detailed description of the invention] The invention makes it possible to reduce the weight and simplify the anti-rotation stopper part provided on the head of the tilt bolt that is slidably fitted into the elongated hole provided in the bracket. The present invention relates to a tilt mechanism that can thereby reduce frictional resistance and facilitate sliding operations during tilt operations.

The structure of the fixing part of a conventional tilt type steering wheel, particularly the fixing part centering on the tilt bolt, and its assembly process will be explained below with reference to the conventional example shown in Figures 1 and 2. That is, a pair of elongated holes 2 are bored in the column bracket 1, and a tilt bolt 3 passes through the elongated hole 2 through a sub-bracket 5 that is integrally attached to a rotatable steering column 4. It is suspended horizontally. This tilt bolt 3 is provided with a stopper part 6 fitted into the elongated hole 2 on the head part to prevent rotation of the tilt bolt 3, and a first washer 7 on the male thread part on the other end side. A tilt nut 9 having a serration portion 8 is screwed in with a predetermined torque.

On the other hand, a fitting portion 11 that fits into the serration portion 8 of the tilt nut 9 is provided at the end of the tilt lever 10.
The fitting portion 11 is fitted into the serration portion 8, and further screwed onto the tilt nut 9 with a bolt 13 via a second washer 12. The assembly process involves passing the tilt bolt 3 through one long hole 2, the sub-bracket 5, and fitting it into the other long hole 2, and inserting the stopper part 6 provided on the head into one long hole 2. Then, after fitting the first washer 7 to the male thread side of the tilt bolt 3, which is prevented from rotating by this, the tilt nut 9 is tightened to a predetermined torque (tilt By rotating the lever 10, the tilt bolt 3 slides in the elongated hole 2 and is screwed together with a torque that allows it to be fixed freely.Furthermore, the tilt lever 10 is fixed with the bolt 13 via the second washer 12. and complete it.

That is, in this conventional structure, a stopper part 6 is integrally provided on the head of the tilt bolt 3, and subsequent work is performed after the tilt bolt 3 is fixed with the stopper part. The first function is to prevent rotation during assembly, and the second function is to prevent rotation when the tilt lever is rotated. Therefore, considering the function of preventing errors during assembly, the stopper part 6 must be made of a material with sufficient strength to withstand the rotational torque during assembly, and for this reason, it is necessary to form the stopper part 6 with a material that has sufficient strength to withstand the rotation torque during assembly. It is integrally molded from metal material.

By the way, in the case of a tilt type steering wheel, it is desirable that the position of the steering wheel can be firmly held and that the position adjustment operation can be easily performed with a small amount of force.
It is necessary to reduce the frictional resistance at the contact portion with the column bracket 1. As a means to satisfy this requirement, it is conceivable to mold the friction part with synthetic resin that has extremely low frictional resistance, but as mentioned above, in the case of the conventional structure, the tilt bolt 3 is not suitable for strength reasons. It has been difficult to realize the above-mentioned means because it requires molding from metal, and the stopper portion provided integrally therewith is also molded from metal.

The present invention has been made from the above viewpoint,
The stopper part 6, which is one of the parts that can cause the most friction during tilt operation, can be molded from synthetic resin without changing the strength required during assembly, thereby reducing frictional resistance. The object of the present invention is to provide a tilt mechanism that makes it easier to adjust the position of a steering wheel.

The configuration of the present invention will be explained below according to an embodiment shown in FIGS. 3 and 4. In the drawings, the same reference numerals are given to the parts common to the conventional example, and only the different parts will be explained.

Reference numeral 3 designates the tilt bolt as described above, and the circumferential surface of its head 3' is formed with a groove 15 for engaging a serration 14 and a ring to be described later. is not formed. 16 is a stopper, as shown in Fig. 4a,
As shown separately in FIG. 1B, a hole 17 is provided in the center, and a serration 18 is provided on the circumferential surface of the hole 17 to engage the serration 14 formed on the head 3' of the tilt bolt. Further, the opposing edges are provided with protrusions 19 that are fitted into the elongated holes 2, and are molded from, for example, synthetic resin with low frictional resistance. 10 is a tilt lever, one end of which is integrally provided with a nut 20;
0 is screwed onto the male threaded portion of the tilt bolt 3 via the washer 7 by this nut 20.

To assemble this embodiment, the tilt bolt 3 is inserted through the sub-bracket 5 through one of the elongated holes 2, and the tilt lever 1 is inserted into the one elongated hole 2.
0 nuts are placed opposite each other, and the tilt lever 10 is fixed at a predetermined angle. The two are screwed together by rotating the tilt bolt 3 with a predetermined torque (as described above). Next, the stopper 16 is attached by engaging the serrations 14 of the tilt bolt 3 and fitting the protrusion 19 into the elongated hole 2. Finally, a ring 2 is installed to prevent the stopper 16 from coming off.
1 is engaged with the groove 15 of the tilt bolt 3 to complete the process.

In this embodiment with the above configuration, each operation of unfixing, adjusting the position, and fixing the steering wheel is performed by rotating the tilt lever 10 and tightening the nut 2 as in the conventional case.
This is done by loosening the bolt 0 and moving the tilt bolt 3 up and down, since the protrusion 19 fitted into the elongated hole 2 on one side is made of synthetic resin with extremely low frictional resistance. The position of the steering wheel can be easily adjusted with a small amount of force.
In addition, the protrusion 19 of the stopper 16 is not used as a rotation stopper when installing the tilt nut 9 and bolt 13 as in the conventional example, but only functions as a rotation stopper when fixing and releasing. Even if it is formed from a thin steel plate coated with a resin sintered alloy or a synthetic resin with a low coefficient of friction, there will be no problem in terms of strength.

As explained above, the present invention uses synthetic resin for the stopper part, which is one of the parts where friction is most likely to occur when adjusting the position of the tilt steering, with low frictional resistance, and also has an impact on the strength when assembled. This is a replacement for the 200mm, which reduces the frictional resistance during tilting and sliding, and allows for adjustment operations with very little force. In addition, in the present invention, the tilt bolt itself is rotated when installing the tilt lever, so the nut can be integrally attached to the tilt lever in advance.
In other words, the tilt lever can be assembled with the tilt lever in a fixed position and the tilt bolt and nut (tilt lever) tightened. Therefore, after installing the tilt bolt as in the conventional case, the tilt lever 10 can be tightened by turning the washer 12 and tightening the bolt. 13, the tilt lever 10 does not rotate, and the quality of the assembly work can be stabilized and the work can be simplified.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the configuration of a conventional tilt type steering wheel, Fig. 2 is a cross-sectional view along the same line, and Fig. 3 is an illustration showing an embodiment of the present invention.
FIG. 4a is a plan view showing an embodiment of the stopper, FIG. 4b is a sectional view taken along the line 4a, and FIG. 4c is a perspective view thereof. 1... Column bracket, 2... Long hole, 3...
Tilt bolt, 4...Steering column, 6...
...Stopper part, 9...Tilt nut, 10...
Tilt lever, 11... Fitting portion, 14... Serration (of tilt bolt), 15... Groove, 17...
...hole, 18... (stopper) serration.

Claims (1)

[Scope of utility model registration request] A serration is formed on the circumferential surface of the head of the tilt bolt, and a tilt lever is integrally connected to the male threaded part with a nut that is screwed into the male threaded part. Further, the tilt bolt head has an elongated hole in which the tilt bolt is fitted, and the tilt bolt head has a serration that engages with a serration formed on the circumferential surface of the tilt bolt head. 1. A tilt mechanism characterized in that a stopper having a protrusion that is fitted into the serrations is mounted by engaging the mutual serrations and fitting the protrusion into the elongated hole.