JPH07125638A - Steering wheel - Google Patents

Abstract

PURPOSE:To provide a steering wheel where no play is generated after a cancel pin is mounted on a vehicle, and no die-cast products are cracked when the cancel pin is set to a core in a steering wheel where cores of a boss part and a spoke part are die-cast. CONSTITUTION:In a steering wheel, cores 12, 14 of a boss part and a spoke part are formed by a die-casting method, and a cancel pin 32 for a winker is projected downward and set to the peripheral part of a boss 20. A cancel pin holding hole 30 consisting of an upper female screw part 26 and a lower fitting hole 28 is formed at the prescribed position of the peripheral part of the boss, and the cancel pin 32 consisting of an upper male screw part 36 and a lower working pin part 37 is screwed into the cancel pin holding hole 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering wheel in which a boss / spoke core is formed by die-casting, and a cancel pin for winker is projected and held around the boss. In particular, the invention is suitable for a steering wheel for large vehicles such as trucks and buses in which the boss / spoke cores are made of aluminum alloy die casting (hereinafter abbreviated as aluminum die casting).

[0002]

2. Description of the Related Art Conventionally, in the above-described winker cancel pin, the pin is usually set in the core by driving the pin into a press-fitting hole formed around the boss. In the past, both the boss / spoke core metal and the cancel pin were usually made of iron (steel).

[0003]

However, from the viewpoint of weight reduction of vehicles these days, it has been considered to make the core metal of the steering wheel of aluminum die-casting even in large vehicles.

In this case, the cancel pin is repeatedly subjected to an alternating load by the column side pin (return cam pin) which is repeatedly linked with the winker lever. It was also found that the cancel pin is made of iron from the viewpoint of strength and economy, so that the pin holding hole may be widened and the cancel pin may loosen. Furthermore, when the cancel pin is set in the aluminum die casting (when press-fitting), there is a tendency to take a large margin for the cancel pin in the press-fitting hole, which may cause the die casting to crack.

In view of the above, the present invention is a steering wheel in which the boss / spoke cores are die-cast, and there is no risk of rattling of the cancel pin after mounting on an actual vehicle. An object of the present invention is to provide a steering wheel in which there is no risk of the die casting cracking when it is set on.

[0006]

A steering wheel according to the present invention solves the above problems by the following constitution.

A steering wheel in which a boss / spoke core is formed by die-casting, and a cancel pin for winker is set so as to project downward at a predetermined position around the boss, which is a predetermined position around the boss. A cancel pin holding hole formed as an upper female screw portion and a lower fitting hole is formed in the cancel pin holding hole, and a cancel pin formed as an upper male screw portion and a lower operating pin portion is screwed and held in the cancel pin holding hole. It is characterized by

[0008]

EXAMPLES The present invention will now be described in detail based on examples.

(1) As shown in FIG. 1, the steering wheel of the present embodiment has a boss / spoke core metal 12, 14
Is formed by aluminum die casting, and the ring mandrel 16 is formed of steel pipe, and the boss / spoke mandrel 12, 14 and the ring mandrel 16 are integrated by welding to form a steering wheel mandrel. ing. The material for forming the boss / spoke cores 12, 14 is not limited to aluminum die casting, but may be magnesium alloy, zinc alloy, or the like. Boss 2 that holds the steering shaft 18
0 is integrated as an insert when a steel forged product in which the holding hole 22 is cut is die-casted from the viewpoint of strength, when the boss / spoke cores 12 and 14 are die-cast.

Then, a part of the ring core metal 16 and the spoke core metal 14 is covered with urethane foam of integral skin by reaction injection molding or the like to form a main body cover 24.

(2) In the steering wheel having the above structure, the cancel pin 22 for winker is set so as to project downward at a peripheral portion of the boss 20, that is, a predetermined position of the core metal 12 of the boss portion. The specific configuration is as follows.

An upper female screw portion 26 and a cancel pin holding hole 30 which is a lower fitting hole 28 are formed at predetermined positions around the boss 20. In addition, the upper end of the upper female screw portion 26 serves as a counterbore seat portion 27 for the male screw portion head 33 of the cancel pin 32.

Here, the cancel pin holding hole 30 is usually provided.
Is formed by forming a through hole as a lower hole and tapping the female screw portion 26 halfway from the upper side. Since the processing of the cancel pin holding hole 30 can be performed simultaneously by the NC tapper at the time of processing the lower hole (cutting edge) and tap stand of the female thread portion 34 for pulling out the steering wheel,
Almost no increase in man-hours.

Further, the cancel pin holding holes 30 are usually formed as a pair of left and right so that they can be applied to both right and left steering wheel type vehicles.

On the other hand, the cancel pin 32 has a diameter that fits into the upper male screw portion 36 corresponding to the upper female screw of the cancel pin holding hole 30 and the lower fitting hole 28, and the lower working pin that projects further downward. And part 37.

Then, the cancel pin 32 is set on the steering wheel by screwing and holding the cancel pin 32 in the cancel pin holding hole 30. That is,
The upper male screw portion 36 of the cancel pin 32 is screwed into the upper female screw portion 26 of the cancel pin holding hole 30. At this time, the cancel pin is set hole (press-fit hole) as in the past.
In addition, there is no need to drive, and there is no risk of the die cast forming the periphery of the set hole breaking.

(3) In this way, the steering wheel with the cancel pin 32 set has the column 40 incorporating the winker mechanism (only the winker lever 38 and the return cam pin 39 are shown), and further the nut 19 is fixed to the steering shaft 18. Then, install it in the actual vehicle.

When the vehicle goes straight, the cancel pin 32 and the return cam pin 39 are in the plane position as shown in FIG. Then, for example, when the winker lever 38 is turned to the right as shown by the chain double-dashed line when turning right, the return cam pin 39 interlocking with the lever 38 turns the cancel pin 32 as shown by the chain double-dashed line. It protrudes to the inner position of the column 40 that interferes with the movement trajectory. When the steering wheel continues to rotate to the right, the cancel pin 32 is pushed out at the outer position, but the winker lever 38 does not return. When the steering wheel is returned from this state to the straight-ahead position (rotated to the left), the switch operating pin 39 is pushed to the right, and then returned to the straight-ahead position, the winker lever 38 returns to the straight-ahead position, and the winker is turned. Is canceled.

As described above, even if the cancel pin 32 is repeatedly subjected to the alternating load by the return cam pin 39, the cancel pin 32 is screwed and held, so that there is no rattling.

[0020]

As described above, the steering wheel of the present invention has a structure in which the cancel pin is screwed from above into the cancel pin holding hole formed at a predetermined position around the boss of the core metal. When the cancel pin is repeatedly subjected to an alternating load each time the vehicle turns right or left, even if the core bar is made of die casting, the holding hole expands and the cancel pin loosens, causing rattling. There is no. In addition, it is not necessary to drive the cancel pin into the set hole (press-fit hole), and when setting the cancel pin to the core metal,
There is no risk of the die cast forming the periphery of the set hole (cancel pin holding hole) cracking.

[Brief description of drawings]

FIG. 1 is a partial plan view of a steering wheel showing an embodiment of the present invention.

FIG. 2 is a sectional view of an actual vehicle mounted on line 2-2 of FIG.

FIG. 3 is an explanatory view of the action of a cancel pin.

[Explanation of symbols]

 12 boss core metal 14 spoke core metal 16 ring core metal 26 upper female screw portion 28 lower fitting hole 30 cancel pin holding hole 32 cancel pin 36 upper male screw portion 37 lower operating pin portion 39 return cam pin

Claims (1)

[Claims] 1. A steering wheel in which a boss / spoke core is formed by die casting, and a cancel pin for winker is set so as to project downward on the periphery of the boss. A cancel pin holding hole formed as an upper female screw portion and a lower fitting hole is formed at the position, and the cancel pin formed as an upper male screw portion and a lower operating pin portion is screwed and held in the cancel pin holding hole. Steering wheel.