JPH0125110Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tilt lever used in a tilt type steering column of a vehicle.

For example, there is a tilt type steering column shown in FIGS. 1 to 3B as a device in which a nut is fixed to one end of a tilt lever and tightened with a screw to fix the mutual positions of parts by friction or the like.

Briefly, the steering column 1 is divided into an upper column 1a and a lower column 1b by a universal joint 3 provided in a column bracket 2 (fixed to the vehicle body), and the upper column 1a is fixed to the column bracket 2. By releasing this, the upper column 1a can be swung (tilted) by a predetermined angle with respect to the lower column 1b. A sub-bracket 5 fixed to the base of the upper column 1a by means such as welding is fitted into the column bracket 2, which has a substantially channel-shaped cross section. A mounting bolt 6 is horizontally suspended so as to pass through the column bracket 2 and sub-bracket 5, and is tightened with a lever 4 having a nut 6 fixed to one end of the male threaded portion 6c of the mounting bolt 6. As a result, the upper column 1a is oscillated within the range of the elongated hole 10.

To explain the lever 4 in more detail, the third
As shown in Figures A and 3B, the lever 4 has an operating part 4a at one end twisted by approximately 90 degrees at a twisting part 4c, and an operating part 4d including a hexagonal opening 4b at the other end.
Insert the hexagonal nut 6 with the flange 6a expanded into a tapered shape into the apex 6b, 6b, 6b.
These three points are integrated by arc welding to the lever 4.

However, with a lever of this configuration, 1. Deformation of the threaded part and deformation around the welded part occur due to the influence of welding, which may cause defects, and 2. The nut needs to be thick to avoid the effects of such deformation. As a result, the size of the screw becomes large or limited, and the bead shape becomes unstable due to variations in welding conditions, which causes variations in the load when pulling out the nut, resulting in a lack of reliability. It was happening.

In view of these problems, the present invention aims to provide a tilt lever for a tilt type steering column that is small and reliable.

4A to 4C show the tilt lever of the tilt type steering column of the present invention.

The lever 14 has an operating part 14a and an operating part 14d having a hexagonal opening 14b on both sides of a twisted part 14c twisted by about 90 degrees, and a hexagonal nut 16 with a collar part 16a expanded into a substantially tapered shape. The opening hole 1
4b, each vertex of the hexagonal nut is swaged as shown in the enlarged view in FIG. 4C, and the swaged portion 16b,
16b, 16b, 16b, 16b, 16b are formed. Furthermore, by pressing three points parallel to the three sides of the hexagonal opening 14b, the pressing portions 14e,
14e and 14e are provided to connect the nut 16 and the lever 1.
It integrates 4.

In the present invention, a non-circular opening is provided at one end of the lever, and a tapered flange portion is integrally provided at one end of a nut having a cross section of the same shape as the opening, and the lever is provided with a non-circular opening. The nut is inserted into the opening, and a caulking part formed by crushing several places on the other end of the nut, and a surface pressing part around the opening, which is sandwiched between the caulking part, connect the lever and the Since the nut is fixed in one piece, there is no need for welding, and there is no deformation of the threaded part due to heat effects.
Since the inner thickness of the nut can be made thinner, the nut can be made smaller and its cost can be reduced.

In addition, by pressing the surface around the hole in the lever, the area around the hole in the lever deforms and protrudes in a direction that fills the clearance created between the nut and the lever, which narrows the clearance between the lever and the nut, causing the lever to close. The feeling of looseness disappears.

Furthermore, since the lever and nut are non-circular, even if a large force is applied between the hole in the lever and the nut, no slipping will occur, so the operating range of the lever will always remain constant. It is maintained.

The lever is held between the flange, which is integrally provided on the nut, and the crimped part, which is formed by crushing several parts of the other end of the nut, so the nut will not come out of the lever unless the crimped part is damaged. Therefore, the pull-out load of the nut is increased, and the reliability of performance is increased.

[Brief explanation of the drawing]

Figure 1 is a diagram showing a tilt type steering column using a conventional lever, and Figure 2 is 2-2 in Figure 1.
The cross-sectional views, Figures 3A and 3B respectively show the conventional lever, and Figures 4A, B and C show the lever of the present invention. 4... Lever, 16a... Flange, 6, 16...
Natsuto, 16b... caulking part.

Claims (1)

[Scope of utility model registration request] A non-circular opening is provided at one end of the lever, and a tapered flange is integrally provided at one end of a nut having a cross section of the same shape as the opening; A nut is inserted, and a caulking part formed by crushing several places on the other end of the nut, and a surface pressing part around the opening that is sandwiched between the caulking parts, integrally hold the lever and the nut together. The tilt lever of the tilt type steering column is characterized by being fixed.