JPH0443421Y2 - - Google Patents

Description

Description: FIELD OF THEINVENTION The present invention relates to a tilt type steering device, and more particularly to a steering device in which the base end of the steering shaft is rotatably supported on the vehicle body by a pin to enable the steering column to be tilted.

[Conventional technology]

In general steering devices, the steering column has a structure that allows it to slide in the axial direction and absorb the impact load when an impact load is applied to the steering column, in order to ensure driver safety in the event of a car collision. ing.

Conventionally, as this type of apparatus, for example, the one shown in FIG. 6 is known (see Japanese Utility Model Application Publication No. 186168/1983).

In this steering device S1, the steering column 1 has a structure in which an upper column 1a and a lower column 1b fit together, and when an impact load is applied to the steering column 1, both columns 1a and 1b fit into each other and move in the direction of engagement. It is designed to slide to absorb impact loads.
In the figure, reference numeral 2 is a steering shaft, 3 is a support bracket that pin-supports the base end of the lower column 1b toward the vehicle body, and 4 is a tilt operation section.

By the way, in this conventional steering device S1, since the steering column 1 has a double structure of the upper column 1a and the lower column 1b, it is necessary to fit them together so that they can slide under a predetermined load. , so column 1a,
1b processing accuracy was required, which caused high manufacturing costs.

In order to solve this problem, the applicant of the present invention has previously proposed a steering device S2 as shown in FIG. 7 (Utility Application No. 116002/1982).
This consists of a U-shaped bracket 6 at the base end of a steering column 5 made of one member, a long hole 7 formed in the bracket 6 along the axial direction of the steering column 5, and a tip of the long hole 7. The part is configured as a rotation hole part 8, and the rear part of the rotation hole part 8 is configured as a slide hole part 9, and a support bracket 10 is fixed to the vehicle body.
The mounting hole 11 opened in the above and the rotation hole portion 8 are rotatably supported by a pin 12. In this support structure, the peripheral edge of the rotation hole 8 is pressed and supported by the caulked pin 12 via the cup washer 13, so that the rotation hole 8 is supported during driving operation and tilt operation of the steering column 5. While the pin support is maintained, if an impact load is applied to the steering column 5 due to an automobile collision or the like, the pin 12 will move relative to the slide hole 9 against the above-mentioned pressing force. The impact load will be absorbed.

7 is a clamp bracket which supports the distance bracket 15 attached to the steering column 5 at a desired angular position on the steering column 5. Reference numeral 16 denotes a mounting bolt integrally formed with the tilt lever 17, which fixes the distance bracket 15 by fastening with nuts 18a and 18b arranged on the outside of the clamp bracket 14. Reference numeral 19 is a key lock device for the steering shaft 20.

[Problem that the invention attempts to solve]

However, in the support structure as described above, the peripheral edge of the rotation hole 8 is pressed and supported by the elastic force of the cup washer 13.
If there are variations in the cup washers 13 during the manufacturing process, it becomes impossible to ensure a constant pressing support force by the pins 12, and there is a risk that the pins 12 may easily move through the slide holes 9.

The present invention was developed based on the above-mentioned viewpoint, and is a tilt-type steering device that can ensure a constant pressing support force by the pins even if there are slight variations in the cup washers during the manufacturing process. is intended to provide.

[Means for solving problems]

The present invention provides a steering device in which the base end of the steering column is rotatably supported by a pin on the vehicle body so that the steering column can be tilted. The rotating hole is rotatably supported by a pin, and the slide hole is opened continuously from the rotating hole in the axial direction of the steering column, and the peripheral edge of the rotating hole has a A recess is formed concentrically with the rotation hole, and a bushing is fitted into the rotation hole at the base end from the outside,
A pin is inserted from the inside through the cup washer, and the tip of the pin is fixed to a mounting hole formed in the support bracket, and the cup washer presses the base end of the pin against the support bracket through the bush. At the same time, the leg portion of the cup washer is supported by a tilt type steering device in which the leg portion of the cup washer is held in tension against the stepped portion of the recess.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the steering apparatus shown in FIGS. 1 and 2, a steering column 22 that encloses a steering shaft 21 is constructed of a single cylindrical member. The base end of the steering column 22 is comprised of a U-shaped bracket 23 that is fitted and fixed to the end of the steering column 22. This bracket 23 has a pair of arm portions 24 on the left and right, and long holes 25 of the same width are formed in the arm portions 24 along the axial direction of the steering column 22. The distal end portion of the elongated hole 25 on the side of the lower yoke 26 is configured as a rotation hole portion 27, while the rear portion continuous from the rotation hole portion 27 is configured as a slide hole portion 28. Also,
In this embodiment, the peripheral edge of the rotation hole 27 is embossed outward, and a concentric recess 29 that is one size larger than the outer peripheral edge of the rotation hole 27 is formed on the inner surface of the peripheral edge. is formed.

On the other hand, a support bracket 30 fixed to the vehicle body side
has a pair of side walls 32 with reinforcing flanges 31 formed along their front edges, and a mounting hole 33 is formed in the lower front side of the side walls 32. Further, a horizontal flange 34 is formed at the upper end of the side wall portion 32, and is fixed to the vehicle body by tightening bolts through fixing holes 35 formed in the horizontal flange 34.

In this way, in order to support the bracket 23 on the support bracket 30 fixed to the vehicle body side, the bush 36 is first fitted into the rotation hole 27 of the bracket 23 from the outside, and then the cup washer as an elastic member is inserted from the inside. pin 38 through 37
After inserting the tip of this pin 38 into the mounting hole 33 of the support bracket 30, it is fixed to the support bracket 30 by caulking from the outside. pin 38
The shaft portion 39 is stepped in the middle, thereby regulating the insertion amount.

3 and 4 show a state in which the left and right arm portions 24 of the bracket 23 are rotatably supported by pins on each side wall portion 32 of the support bracket 30 by the above-described means. In this support structure, the pin 38 is caulked with the stepped portion of the shaft portion 39 in contact with the peripheral edge of the mounting hole 33 of the support bracket 30, and the head 40 of the pin 38 presses the cup washer 37 against the bracket 23. are doing. In this case, as shown in FIG.
The cup washer 37 is fitted into the inside of the pin 38, and the cup washer 37 is elastically deformed and gradually expanded due to the pressing force from the pin 38, and its leg portion 41
is caught on the stepped portion 42 of the recess 29 and stops. As a result, the cup washer 37 is inserted between the head 40 of the pin 38 and the bracket 23 with the leg 41 stretched out, so that the cup washer 37 is subject to slight variations in the manufacturing process. Even if it gets hot, the pin 38 will easily fit into the slide hole 28.
The steering column 22 is reliably supported by the rotation hole 27 of the bracket 23 without moving.

In addition, in Fig. 2, the reference numeral 43 is a clamp bracket, and a weld bolt 4 is used to fix it to the vehicle body.
4 is erected on the upper end flange 45. The clamp bracket 43 is fixed to the vehicle body via a slide block 53 that is removably attached to a mounting bracket 52 on the vehicle body side. Further, this clamp bracket 43 is provided with a slide groove 46. Code 47 is steering column 2
It is a distance bracket fixed to 2,
It is positioned on the clamp bracket 43 by rotating the tilt lever 48. A mounting bolt 49 that is inserted into the slide groove 46 and the through hole of the distance bracket 47 is integrally formed on the tilt lever 48. By tightening the mounting bolt 49 and the nut 50, the distance bracket 47 is fixed. is fixed. In addition, in the figure, 51 is a rod that is tightened and fixed by a wedge action between it and the nut 50, and its upper end is connected to the clamp bracket 4.
3.

Therefore, according to this steering device, when tilting the steering column 22, the tilt lever 48 is rotated to tighten the mounting bolt 4.
9 from nut 50, and remove steering column 2.
2 to the desired angular position. Even when the steering column 22 is rotated around the pin 38, the cup washer 37 is held in a tensioned state within the recess 29, so the peripheral edge of the rotation hole 27 is pressed with the same constant pressure as in normal times. Support with pressure. As a result, a stable tilt operation can be obtained without causing the pin 38 to come off the rotation hole 27 and shift into the slide hole 28 during rotation.

In the above embodiment, in addition to the pin support via the bush 36, the peripheral edge of the rotation hole 27 is supported by the cup washer 37, so that there is no space between the pin 38 and the rotation hole 27. This can effectively prevent rattling.

On the other hand, when an impact load in the axial direction is applied to the steering column 22 due to a collision of a car, etc., the cup washer 37 cannot fully extend in the recess 29 and slides over the stepped portion 42.
8 comes off from the rotation hole 27 and relatively moves backward through the slide hole 28, thereby absorbing the impact load.

In the above embodiment, the long holes 25 are formed with the same width, but the width is not necessarily limited to this. For example, as shown in FIG. It may be made larger than the width of the hole 28. In this case, the shaft diameter of the pin is set to be slightly larger than the width of the slide hole 28, and when a load of more than a predetermined value is applied to the steering column 22 due to a vehicle collision, etc., the pin moves out of the slide hole 28. Moves relatively while crushing the edges. In addition, in the above embodiment, the steering column 2
Although the case where the base end of the steering column 22 is configured with the bracket 23 and the elongated hole 25 is formed therein has been described, the present invention is not limited thereto.
It may be provided directly at the proximal end of the cylindrical member constituting the cylindrical member.

[Effect of idea]

As explained above, the tilt type steering device according to the present invention has a support structure that can tolerate variations due to the manufacturing process of the cup washers to some extent, and the pin support of the steering column becomes more reliable. In addition, a recess is formed on the periphery of the rotation hole,
Since the leg portion of the cup washer is held in tension on the stepped portion of this recess, rattling can be reliably prevented even if the pressing force of the cup washer is small. In this way, the pin does not easily move through the slide hole, and the manufacturing control of the cup washer does not have to be as strict as in the past, making it possible to reduce manufacturing costs.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the structure of the main parts of a steering device according to the present invention, FIG. 2 is a front view of the entire steering device according to the present invention, and FIG. 3 is a sectional view taken along the line in FIG. FIG. 4 is an enlarged view of part A in FIG. 3, FIG. 5 is a perspective view showing another embodiment of the long hole formed in the steering column, and FIG. 6 is a front view showing an example of a conventional steering device. FIG. 7 is an exploded perspective view showing the steering device according to the previously proposed example. 1, 22... Steering column, 6, 23...
... Base end (bracket), 27 ... Rotation hole, 2
8...Slide hole, 29...Recess, 30...Support bracket, 33...Mounting hole (of the support bracket), 36...Button, 37...Cup washer, 38...Pin, 41...Leg (of Katsupuwashiya), 42... step part.

Claims (1)

[Scope of utility model registration request] In a steering device in which the base end of the steering column is rotatably supported by a pin on the vehicle body so that the steering column can be tilted, the base end is rotatably supported by a pin on a support bracket fixed to the vehicle body. A slide hole is provided in the axial direction of the steering column continuously from the rotation hole, and a concave concentric with the rotation hole is provided at the periphery of the rotation hole. A bushing is fitted into the rotation hole of the base end from the outside, and a pin is inserted from the inside via a cup washer, and the tip of the pin is opened in the support bracket. The cup washer is fixed in the hole, and the cup washer presses the proximal end portion of the cup washer against the support bracket via the bushing, and the leg portion of the cup washer is held in tension against the stepped portion of the recess. Tilt type steering device.