JPS60161249A - Tilt steering apparatus for car - Google Patents

Abstract

PURPOSE:To reduce the number of parts by using a spring for adjusting the position of a steering wheel as a spring for springing-up a steering assy when a driver get-in and -out a car. CONSTITUTION:When a driver gets out a car, a lock member 12 is pulled-out from a locking hole 7c, and then a cam pin 17 is shifted upwardly along an inclined cam 18 by the springy force of a coil spring for springing-up, and also a steering assy is sprung upwardly and set at the highest position. Since, in this case, a movable bracket 7 and a column bracket are fixed by a fastening member 10, the movable bracket 7 is shifted upwardly, integrally with the steering assy, guided by the guide pin 7b and a guide groove 8b. When a driver gets in the car, a steering wheel 1 is pushed down, and then the movable bracket 7 is locked onto a fixed bracket 8, and the steering assy returns to the driving position set before the springing-up.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tilt steering device for a vehicle.

In vehicles such as automobiles, there are already various tilt steering devices that can adjust the angle of the steering shaft up and down according to the driver's physique and preferences and set the steering wheel to the desired position. It has been developed (for example, see Japanese Utility Model Application Publication No. 13063/1983) and is generally used.

In the above-mentioned tilt steering device, when the driver gets on and off, the driver unlocks the tilt mechanism and flips the steering shaft upward to raise the handlebar position, making it easier for the driver to get on and off the vehicle. A lifting spring is provided, but conventionally, this lifting spring was normally placed between the movable side and the fixed side on both sides or above the column shaft that supports the steering shaft. However, if we try to increase the force of the flip-up spring so that it can be applied to a heavy steering device, there is a problem in that the flip-up spring becomes larger and the entire tilt mechanism has to become larger. There is.

The main object of the present invention is to solve the problems of the conventional devices as described above and to provide a device that can obtain a large lifting force with a small and compact mechanism. Refer to and explain.

In FIG. 1, 1 is a steering handle, and 2 is a steering shaft. The steering shaft 2 is rotatably supported within a column shaft 3, and the column shaft 3 has its lower end cut into a vehicle body side member 4 such as a toe board. It has a structure in which the upper part is supported by the vehicle body side member 4 by a tilt mechanism 5, which will be described later.

As shown in FIGS. 2 to 4, the tilt mechanism 5 includes a column bracket 6 fixed to the outer peripheral surface of the column shaft 3.
a movable bracket 1 having both side surfaces in sliding contact with the outer surfaces of both left and right side surfaces of the column bracket 6; and a vehicle body member 4 having both side surfaces facing the outer surfaces of both left and right side surfaces of the movable bracket 10.
It consists of a fixing bracket 8 fixed to the holder with bolts or the like.

A space 61 is fixed to the column bracket 6 that communicates bolt through holes 6α, 6α provided on both sides thereof, and bolt through holes 6α of the column bracket 6 are provided on both sides of the movable platen 70.

Tilt guide grooves 7α and Tα are provided at positions opposite to the bolt through holes 6α and 6a and the tilt guide groove Tα.
, 7α, and by tightening a nut-shaped tightening member 10 that is threaded onto the bolt 9, both sides of the movable bracket 70 are fixed to both sides of the column bracket 60 by pressure, and the tele lever 11 is operated. By loosening the tightening member 10, the column bracket 6 is moved to the tilt guide 1 of the movable bracket 7! F17α and 7α can be trained by moving up and down.

Note that 8α and 8α are escape groove holes for the bolt 9 and the tightening member 10 provided on both sides of the fixing bracket 80.

Guide pins 7b are provided on both sides of the movable bracket T.
7b is fixedly installed, and guide grooves Bh, into which the guide pins 7b, 7h are fitted, are provided on both sides of the fixed bracket 80.
Bh is provided, and a lock hole 7C is provided on one side of the movable bracket 7, and when the lock member 12 provided on the fixed bracket 8 is fitted into the lock hole 7c of the movable bracket T, the movable bracket 7 becomes a fixed bracket. 8, and when the lock member 12 is pulled out from the lock hole IC by operating an operation member (not shown), the movable bracket T moves into the guide grooves Bh, BbK of the fixed bracket 8.
K is set so that it can be placed in an unlocked state where it can be moved up and down with G. Note that the locking member 12 is biased in the locking direction by a spring 13.

14 is a coil spring for flipping up, and the coil spring 14 for flipping up the nucleus is arranged inside the column shaft 3.

That is, the column shaft 3 is cut and bent inward to form a spring receiver portion 3α, and the upper end portion of the flip-up coil spring 14 is supported in the spring receiver portion 3α via the upper spring seat 15. Cam pins 17, 17 protruding left and right are fixed to the lower spring seat 16 that supports the lower end of the flip-up coil spring 14, and the cam pins 17, 17 extend along the axial direction 11#3b, 3h provided on the column shaft 3. It passes through and further passes through the inclined cam grooves 8C provided on both sides of the fixed bracket 8, and comes into contact with the inclined cam 18 provided at the lower edge of the cam groove 8c. The spring force 14 acts in a direction to push down the cam pins 17, 17.

It goes without saying that the steering shaft 2, which is rotatably supported within the column shaft 3, passes through the coil of the flip-up coil spring 14.

In the above configuration, when the lock member 12 is fitted into the lock hole 7c, the movable bracket 7 is fixed to the fixed bracket 8, and in this state, when the torque lever 11 is operated to loosen the tightening member 10, the movable bracket 7 is fixed to the fixed bracket 8. The column bracket 6 becomes free with respect to the movable bracket 7. Then, by the spring force of the flip-up coil spring 14 disposed inside the column shaft 3, the cam pins 17, 17 are lodged in the inclined cam 18 and moved in the direction of the arrow in FIG. 2, thereby moving the column shaft 3 upward. Let, cam pin 17
, 17 is the inclined cam groove 8c.

The column shaft 3 is flipped up to the top tilt position located at the upper end of the platen 8C, and the port 9 moves upward within the tilt guide groove γα of the movable platen 7. In this state, the driver lowers the steering wheel 1 to his or her optimum driving position, and at that position operates the tilt lever 11 to tighten the tightening member 10 and fix the column bracket 6 to the movable bracket 1. 1. A steering assembly consisting of a steering shaft 2 and a column shaft 3 is fixedly held on a fixed bracket 8 via a movable bracket 7 at an optimum driving position.

When the driver operates an operation member (not shown) when getting off the vehicle, the lock member 12 resists the spring 13 and is pulled out from the lock hole 7c. Then, the spring force of the flip-up coil spring 14 causes the cam pins 17, 17 to move upward along the inclined cam 18 in the direction of the arrow in FIG. 2, causing the steering assembly to flip upward and reach the highest tilt position. do. In this case, the movable bracket 7 and the column bracket 6 remain fixed by tightening the clamping member 10, so the movable platen 7 is integrated with the steering assembly, and the guide bin 7b and the guide groove 8
It moves upward guided by b. In this way, the driver can easily get on and off the vehicle without the steering wheel getting in the way.

The next time the driver gets on the vehicle, when he lowers the steering wheel 1 that has been raised to the highest tilt position as described above, the steering assembly and the movable bracket 7 are lowered together, and the lock hole 7c of the movable bracket 7 is locked. Fixed bracket 8
When the locking member 12 reaches the tip of the locking member 12 attached to the locking hole 1c, the locking member 12 is automatically fitted into the locking hole 1c by the spring force of the spring 13, and the movable bracket 7 is connected to the fixed bracket 8.

In this state, the position of the steering assembly with respect to the movable bracket 1 is the same as before the flip-up, and the steering assembly returns to the optimal driving position set before the flip-up, and there is no need for readjustment at all.

As shown in FIG. 5, the angle of inclination of the uppermost part of the inclined cam 18 is changed from that of the other cam surface α to form a gently inclined part, so that the cam pin 17 can be easily tilted when the steering assembly is flipped up. It is possible to improve stability when riding on a gentle slope and bouncing up.

In addition, the inclination of the cam may not only be made constant over the entire area as in the embodiments shown in the first and second figures, but may also be made of a curved surface in which the inclination angle changes at each point. It is effective for increasing/decreasing the lifting force or adjusting the feel of setting operations.

As described above, according to the present invention, a single coil spring can serve both as a spring for adjusting the handle position and as a spring for flipping up the steering assembly when getting on and off, thereby reducing the number of parts. ,
The coil spring is housed inside the column shaft using the space within the column shaft, so even if the coil spring is large and the spring output is large, there will be no space problems at all, and the steering assembly will be heavy. Further, the spring force can be set to be sufficient to cope with large tilts, and by combining changes in the inclination angle of the inclination cam, it is also possible to finely adjust the flip-up force. Furthermore, not only can the entire tilt mechanism be made small and compact, but the coil spring is housed inside the column shaft that cannot be seen from the outside, resulting in a very clean and good-looking appearance, which has many practical advantages. It can have an effect.

In addition, in the illustrated embodiment, the column shaft is supported by the fixed bracket via the movable bracket, so that when the driver gets out of the vehicle, the steering assembly unites with the movable bracket and flips up to the highest tilt position, thereby preventing the steering assembly and the movable bracket from tightening. The present invention is shown as an example in which the present invention is applied to a device having a tilt memory function to prevent the positional relationship from changing. 3 is supported by a tightening member 10 so as to be adjustable vertically.It can also be applied to a tilt steering device without a tilt memory function. 3 is released, the flip-up coil spring 14 disposed inside the column shaft 3 causes the cam bin 1T to return to the tilt cam 18 and move upward, thereby flipping the steering assembly upward and tilting it. This is the top position. In this case as well, the flip-up coil spring 14 is housed inside the column shaft 3 by utilizing the space inside the column shaft 3, which has the advantage of space, the ability to increase the spring output, and the fact that the entire tilt mechanism can be made small and compact. Needless to say, it is possible to achieve substantially the same effects as in the above-described embodiments, such as improved performance and improved appearance.

[Brief explanation of drawings]

FIG. 1 is an overall side view showing an embodiment of the present invention, FIG. 2 is an enlarged side view of the tilt mechanism shown in FIG. 1, FIG. 6 is an n+-at@ side view of FIG. 2, and FIG. is a sectional view taken along rV-IV in FIG. 2; FIG. 5 is a side view showing a modification of the inclined cam. DESCRIPTION OF SYMBOLS 1... Steering handle, 2... Steering shaft, 3... Column shaft, 4... Vehicle body side member, 5... Tilt mechanism, 6... Column bracket,
7... Movable bracket, 8... Fixed bracket, 9
...Bolt, 10...Tightening member, 11...Tilt lever, 12...Lock member, 14...Coil spring for flipping up, 15.16...Spring seat, 17... Cam bin, 18... inclined cam. that's all

Claims (1)

[Claims] 11) A tilt steering device in which a column shaft rotatably supporting a steering shaft is supported by a fixed bracket fixed to a vehicle body side member so as to be vertically movable by a direct tightening member; or In a tilt steering device, the column shaft is supported by a movable bracket which is removably supported by a lock member on a fixed bracket fixed to a member on the vehicle body side so as to be movable in the vertical direction. A tilt steering device for a vehicle, characterized in that a tilt-up spring that is biased in a direction to move the column shaft upward is disposed inside the column shaft. (2) The flip-up spring is a coil spring, one end of which is engaged with an upper spring seat fixed within the column shaft, and the other end is attached to a fixed bracket via a cam pin provided on the lower spring seat. 2. The tilt steering device for a vehicle according to claim 1, wherein the vehicle tilt steering device is supported by a tilt cam, and a spring force is applied in a direction to move the cam pin obliquely upward along the tilt cam. (3) The upper spring seat has a spring receiver formed by cutting and raising a part of the column shaft inward, and the upper spring seat is abutted against and locked to the part of the column shaft.
The tilt steering device for a vehicle described in Section 1. (4) According to claim 2 or 3, the cam pin passes through an axial groove provided on the column shaft and abuts on an inclined cam provided on a fixed bracket outside the cam pin. The vehicle tilt steering device described above. (5) The tilt steering for a vehicle according to claim 4, wherein the tilt cam has a curved cam direction so that the tilt angle changes at each tilt position. Device.