JPS62157862A - Tilt steering - Google Patents

Abstract

PURPOSE:To permit a movable bracket to be securely fixed at a prescribed angle with respect to a fixed bracket, by providing a constitution that an overlapped portion of the fixed bracket and the movable bracket is held under pressure relatively inwardly by the tightening force of a lock bolt and a lock lever. CONSTITUTION:A steering shaft 1 comprises a lower shaft 1a axially supported by a fixed bracket 3 and an upper shaft 1b axially supported by a movable bracket 4. A lock lever 5 is supported by a shaft 15 at the side wall of the fixed bracket 3 and a ratchet restricting claw 23 is fixed to the end of the shaft 15. In addition, a plurality of locking teeth 18 are formed at the side wall front edge 17 of the movable bracket 4. The restricting claw 23 is provided with a tip claw portion 23a in such a manner that it is movable only when a claw portion 20a of a claw of the ratchet 20 is engaged with the engaging teeth 18. Then, the movable bracket 4 is permitted to be fixed at a prescribed angle by threadedly engaging the shaft 15 with a lock bolt 14 passing through round holes 8 at both sides of the fixed bracket 3 and arc-shaped holes 10 at both sides of the movable bracket 4.

Description

[Detailed Description of the Invention] Pressure 91"υ■L The present invention facilitates steering operation by adjusting a steering wheel attached to a tilting steering shaft to a position that passes through the driver's physique. This relates to tilt steering.

Conventional Technology In recent years, tilt steering is often used in automobiles to adjust the position of the steering wheel to suit the physique of the driver by appropriately changing the inclination of the steering shaft, making it easier to operate the steering device. There is.

The above-mentioned tilt steering includes a first bracket having a pair of support parts fixed to the vehicle body side, and a tiltable steering shaft which is attached to the first bracket so as to be tiltable in the vertical direction and rotatably supports the tiltable steering shaft. a second bracket,
It is composed of a bolt that is inserted laterally into the overlapping portion of the first and second brackets and has one end fixed to the overlapping portion, and a mouth 7 clever that is mounted on the free end of the bolt, By operating the lock lever, the overlapping portions of the first and second brackets are clamped relatively inward on the axis of the bolt and locked by mutual frictional force, and the steering shaft is adjusted to a desired angle of inclination. Those that are fixed are common.

JJ is also missing ↓ Y to J] J1 title.

In the above-mentioned tilt steering, the frictional force generated between the first and second brackets may fall below the specified level due to dimensional accuracy between each component due to dimensional errors in manufacturing and wear between the components due to long-term use. .

- The movable side of the tilt steering wheel is relatively heavy as various switches are attached to it in addition to the steering wheel, and the reduction in frictional force as described above is due to the position of the movable side,
In other words, it is difficult to maintain the steering wheel at a constant position.

The present invention was made in view of the above problems, and consists of a steering wheel fixed to an upper shaft that can be bent with respect to a lower shaft. A steering shaft, a fixed bracket fixed to the vehicle body and rotatably supporting the lower shaft, and a fixed bracket disposed on the fixed bracket to be able to swing up and down and rotatably supporting the upper shaft. A movable bracket, a lock pole inserted laterally into the overlapping part of the fixed bracket and the movable bracket, and a lock bolt attached to the tip of the lock bolt, which allows the two brackets to be moved relative to each other by the fastening force with the lock bolt. a lock lever that clamps inward to fix the movable bracket at a predetermined angle; and a lock lever that is swingably disposed on the fixed bracket;
a ratchet that meshes with a predetermined number of engagement teeth formed on the movable bracket; a spring that is disposed between the ratchet and the fixed bracket and presses the claw portion of the ratchet to engage the engagement teeth; and a spring that engages the engagement teeth of the movable bracket; It consists of a ratchet restraining pawl which is disposed coaxially with the lock lever and rotates together with the lock lever, and the tip pawl of the ratchet restraining pawl is engaged only when the ratchet pawl engages with the engaging tooth.
This tilt steering is formed so as to be able to move to the rear of the ratchet in accordance with the locking operation of the mouth and lever, and the distal end pawl prevents the ratchet pawl from separating from the engaging teeth.

In the tilt steering according to the present invention, the overlapping portion of the fixed bracket and the movable bracket is pressed relatively inward by the fastening force between the lock bolt and the lock lever, and the frictional force generated between the fixed bracket and the movable bracket is suppressed. In addition, the movable bracket 1- can be fixed at a predetermined angle with respect to the fixed bracket by preventing the movement of the ratchet in the disengagement direction that has engaged with the engaging teeth of the movable bracket by the ratchet restraining pawl that interlocks with the lock lever. .

Figures 1 to 5 show an embodiment of the tilt steering according to the present invention.

In the drawings, (1) is a steering shaft extending from a steering gear (not shown) and has a steering wheel (2) fixed to its tip, (3) is a fixed bracket fixed to the vehicle body, and (4) is a fixed bracket (3). The movable bracket (5) is the fixed bracket (3) installed on the
It shows a locking lever arranged on the side of the steering wheel (2) and extending towards the steering wheel (2).

The above steering shaft (1) is attached to the fixed bracket (
The lower shaft (1a) is pivotally supported by a movable bracket (4), and the upper shaft (1b) is pivotally supported by a movable bracket (4).
are tiltably connected by a universal joint (6).

The fixing bracket (3) is a member made by bending a flat plate material of a predetermined shape into a substantially U-shaped front view, and has shaft holes (7) (7) bored in the center of both side walls, respectively. Also, diagonally below the shaft holes (7), there are round holes (8) (8) for mounting the lock lever (5). on the other hand,
The movable bracket (4) is a member made by bending a flat plate material of a predetermined shape into a substantially U-shape in plan view, and has a wall at the center of both side walls.
Shaft holes (9) (9) corresponding to the shaft holes (7) (7) of the fixing bracket (3) are formed near the front edges of both side walls. 9), arcuate holes (10) (10) corresponding to the round holes (8) (8) of the fixing member (3) are formed. The fixed bracket (3) and the movable bracket (4) are connected by rotating shafts (11) (11) inserted through shaft holes (7) (7), (9) (9) formed in the opposing side walls, respectively. is,
The movable bracket (4) is tiltable while being clamped from the outside by the fixed bracket (3).

On the axis of the round holes (8) (8) of the fixed bracket (3), the fixed bracket (3) and the movable bracket I/(
4) Between the mutually corresponding side walls is a washer plate whose front and back surfaces are in sliding contact with the side walls 1- (12) (12)
A cylindrical spacer (13) having a length approximately equal to the width between the side walls is disposed between the two side walls of the movable bracket (4). And this round hole (8)
(8) In between, a multi-start thread is formed at the tip and a flange-shaped head is formed at the base end. - (14) is inserted. Therefore, this lock bolt (14) is inserted into one round hole (8) of the fixing bracket (3), one shear plate (1
2), one arcuate hole (10) of the movable bracket (4)
), the spacer (13), the other circular arc hole (lO) of the movable bracket (4), the one shear plate (12), and the other round hole (8) of the fixed bracket (3) are penetrated. Round hole (8) on the other side of the fixing bracket (3)
A support shaft (15) of the lock lever (5) is mounted on the tip of the lock bolt (14) protruding from the lock bolt (14).

Movable bracket z on the side where the above lock lever (5) is installed
The front edge of the side wall of the hole (4) is formed with an arcuate periphery (17) along the above-mentioned arcuate hole (10), and this arcuate periphery (
A notch (18) is formed in the upper part of the ring 17), and a predetermined number of engaging teeth (19), (19), etc. are formed in the lower part.

On the other hand, on the inside front of the side wall of the fixed bracket (3) on the side where the lock lever (5) is disposed, there is a ratchet 7) (20) in an abbreviated shape that can be slid freely around the center. It is located in

On the outside of the upper end of this ratchet (20), there is a claw portion (20) that engages with the engaging teeth (19) (19).
a) is formed, and this pawl (20a) is a ratchet (
20) The engaging teeth (19) (19) and the spring (21) disposed between the other end and the fixed bracket (3)
...is energized towards...

Furthermore, the lock lever (5) of the fixed bracket (3)
On the front part of the side wall on the side where the lock lever (5) is installed,
An arcuate hole (22) is formed centered around the round hole (8) for mounting the lock lever, which is fixed to the base end of the support shaft (15). -(5)
The distal end claw portion (23a) of the ratchet restraint claw (23) that swings together with the ratchet member protrudes inward. The tip claw portion (23a) of the ratchet restraint claw (23) is connected to the ratchet
The claw portion (208) of (20) is the engaging tooth (19).
(19) Ratchet l only when engaged with...
- (20) so as to be able to move to the inner arcuate portion (20b) of the upper end portion where the claw portion (20a) is formed.

The adjustment procedure for the tilt steering having the above configuration will be explained below.

In the state shown in FIGS. 1 and 4, the lock lever (5
) by the fastening force generated between the support shaft (15) and the lock bolt (14), both side walls of the fixed bracket (3) and the movable bracket (4) are pressed toward the spacer (13), respectively. Frictional force is generated on both sides of the washer plate (12) (12) placed between both brackets 1-(3) and (4), and the pawl (20a) of the ratchet 1-(20) is The engaging teeth (19) of the movable bracket (4) are caused by the biasing force of the spring (21).
In this state, the lock lever (5) is engaged with one of the locking claws (5) attached to the same shaft.
The movement in the detachment direction is restricted by the distal end claw portion (23n) of 23). Therefore, the movable bracket (4) is moved to the fixed bracket due to the frictional force generated between the movable bracket (4) and the fixed bracket (3), and the engagement between the claw portion (20a) of the ratchet (20) and the engaging teeth (19). The upper shirt (lb) fixed to (3) and pivotally supported by the movable bracket (4) is fixed at a constant angle.

From this state, to adjust the position of the steering wheel (2), that is, the inclination angle of the movable bracket (4), first rotate the first lever (5) downward in Figure 1 and lock it. The fastening force between the bolt (14) and the support shaft (15) is released.

Then, the fixed bracket (3) and the movable bracket (
The pressing force of each side wall of 4) on the spacer (13) is released, and a washer plate (
12) The frictional force generated by (12) is reduced. In addition, in this state, the ratchet restraint claw (23)
The tip claw part (23a) of the fifth
The ratchet (20) is moved upward in the figure, and the ratchet (20) can be moved in the direction of disengagement from the engagement teeth (19).

Next, hold the steering wheel (2) and swing it upwards or downwards, and the ratchet (2)
As shown in FIG.
9) The movable bracket (4) repeatedly engages and disengages with the movable bracket (4), giving a sense of control.

Connect the steering wheel (2) with the ratchet (
When the lock lever (5) is moved upward in FIG. 1, the lock bolt (14) is stopped at a predetermined position where the pawl (20a) of the lock bolt (20) engages with the locking tooth (19), and the lock lever (5) is moved upward in FIG.
) and the support shaft (15), the one shear plate (12> (12) causes a π vibration between the fixed bracket (3) and the movable bracket) A force is generated and the ratchet (
The claw part (20a) of the ratchet 1-76J bundle claw (2
The movable bracket (4) is prevented from swinging in the detachment direction by the tip claw portion (23a) of the fixed bracket (3).
It is fixed in the above-mentioned position.

In addition, in the above embodiment, the steering wheel (2
), the movable bracket (4) can be tilted upward at a large angle, and the steering wheel (2) can be moved upward to facilitate getting into and out of the automobile.

As explained above, in the tilt steering according to the present invention, the overlapping portion of the fixed bracket and the movable bracket is clamped inwardly by the fastening force between the lock bolt and the lock lever, and the fixed bracket and the movable bracket are pressed relatively inwardly. The movable bracket is held in a predetermined position relative to the fixed bracket by preventing the frictional force generated between the movable bracket and the movable bracket and the movement of the ratchet in the disengagement direction that is engaged with the engaging teeth of the movable bracket by the ratchet restraining pawl that interlocks with the lock lever. Since it can be fixed at an angle, even if the frictional force generated between the movable bracket and the fixed bracket is less than a predetermined value that can hold the movable part, the ratchet that has engaged with the engagement teeth can be released. By blocking the movement in this direction by the ratchet restraining pawl that interlocks with the lock lever, the movable bracket 1 can be reliably fixed to the fixed bracket, and the position of the steering wheel can be adjusted with a sense of moderation. It is convenient for practical soil raking.

[Brief explanation of drawings]

1 to 5 are drawings showing an embodiment of the tilt steering according to the present invention, in which FIG. 1 is a side view, FIG. 2 is a bottom view, FIG. 3 is a split perspective view, and FIG. FIG. 5 is a schematic diagram for explaining the operation of the ratchet and the ratchet restraining pawl. (1)--steering shaft, (la)--lower shaft, (1b)--upper shaft, (2)--steering wheel, (3)-m-fixed bracket, (4)-movable Bracket, (5) -Losochrehar, (Work 4)--a bolt, (19) (19)-one engagement, (20)-ratchet, (20a)--ratchet throat claw part, ( 21
) - Spring, (23) - Ratchet restraining pawl, (F3 a)... - Tip pawl portion of ratchet restraining pawl.

Claims (1)

[Claims] (1) A steering shaft in which a steering wheel is fixed to an upper shaft that can be bent with respect to a lower shaft; a fixed bracket that is fixed to the vehicle body side and rotatably supports the lower shaft; A movable bracket that is disposed on the fixed bracket so as to be able to swing up and down and rotatably supports the upper shaft, a lock bolt that is inserted laterally into the overlapping portion of the fixed bracket and the movable bracket, and this lock. A lock lever is screwed onto the tip of the bolt and clamps both brackets relatively inward by the fastening force with the lock bolt to fix the movable bracket at a predetermined angle, and a lock lever is swingable to the fixed bracket. a ratchet disposed on the movable bracket that engages with a predetermined number of engagement teeth formed on the movable bracket; and a ratchet disposed between the ratchet and the fixed bracket that presses the claw portion of the ratchet to engage the engagement teeth. Consisting of a spring and a ratchet restraining pawl that is arranged coaxially with the lock lever and rotates together with the lock lever, the end pawl of the ratchet restraining pawl is engaged with the ratchet pawl and the engaging teeth. The ratchet is formed so that it can move to the rear of the ratchet only when the lock lever is locked, and the distal end pawl prevents the ratchet pawl from detaching from the engagement tooth. Tilt steering.