JPH0454061Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an inclination adjustment device for a steering barrel of a vehicle.

[Prior Art] As shown in Fig. 2, the steering barrel disclosed in Japanese Patent Publication No. 52-35168 is used to obtain the front-rear position and vertical position (axial position) of the steering wheel that is optimal for the driver's physique. In the tilt adjustment device, a steering shaft 1 supporting a handle 21 is rotatably supported by an upper steering barrel 2, and a lower end of the steering shaft 1 is connected to a lower steering shaft 23 by a universal joint 22. A movable bracket 3 fixed to the upper steering barrel 2 is provided with a long hole 3a in the vertical direction (strictly parallel to the steering shaft 1), while a fixed bracket plate 4 fixed to the vehicle body is provided with a long hole 3a in the longitudinal direction (strictly parallel to the steering shaft 1). is a direction perpendicular to the steering shaft 1) is provided with an elongated hole 4a, and a bolt inserted into the elongated hole 3a, 4a.
Tighten the nut integrated with the adjustment knob 11 to fix the handle 21 in a proper position.

In the above-mentioned inclination adjustment device, when the adjustment knob 11 is loosened, the handle 21 moves forward and backward and up and down at the same time, so it is difficult to tighten the adjustment knob 11 while holding the handle 21 in an appropriate position.

[Problem that the invention aims to solve] There is also a tilt adjustment device that has separate bolts and adjustment knobs so that the front and rear and up and down positions of the handle can be adjusted separately, but this device uses two adjustment knobs that are attached to the upper steering wheel. It becomes necessary to arrange them on both sides of the cylinder, and there are many protrusions from the upper steering cylinder, which increases the number of parts and makes it difficult to reduce costs.

In view of the above-mentioned problems, the object of the present invention is to provide a steering barrel tilt adjustment device that is simple in construction and allows the front and rear and up and down positions of the handle to be adjusted independently by operating a single adjustment knob. It is in.

[Means for Solving the Problems] In order to achieve the above object, the structure of the present invention is such that a movable bracket is extrapolated to the upper steering tube that supports the steering shaft, and a long hole in the longitudinal direction is fixed to the vehicle body side. A boss portion protruding laterally from the movable bracket is abutted against one surface of a fixed bracket plate having a movable bracket, a hollow bolt inserted through the elongated hole is screwed into the bolt hole of the boss portion, and a small diameter bolt is inserted into the hollow bolt. is screwed into a bolt hole concentric with the bolt hole that passes through the boss part, the tip of which abuts against the upper steering barrel, and a hollow bolt is fitted onto the adjustment knob that is externally fitted onto the head of the small diameter bolt so as to be movable in the axial direction. A spline hole is provided to selectively fit into a spline shaft formed in each head of a small-diameter bolt.

[Operation] Push the adjustment knob toward the fixed bracket plate to engage the spline hole with the spline shaft of the hollow bolt,
By loosening the hollow bolt, the movable bracket can be moved back and forth along the elongated hole in the fixed bracket plate to adjust the front and back position of the handle.

Pull the adjustment knob away from the fixed bracket plate to engage the spline hole with the spline shaft of the small-diameter bolt, and loosen the small-diameter bolt to move the upper steering barrel axially relative to the movable bracket, adjusting the handle up and down. The position can be adjusted.

[Embodiment of the invention] FIG. 1 is a rear sectional view of a steering tube inclination adjustment device according to the invention. A reinforcing plate 6 is overlappingly joined by welding to a fixed bracket plate 4 fixed to the vehicle body side, and elongated holes 4a are provided in the fixed bracket plate 4 and the reinforcing plate 6 in the longitudinal direction (strictly speaking, in the direction perpendicular to the plane of the paper). . A non-slip plate 7 is superimposed on the reinforcing plate 6, and a boss portion 13 of the movable bracket 3 is superposed on the opposite side of the fixed bracket plate 4. A hollow bolt 8 passing through the anti-slip plate 7, the reinforcing plate 6 and the fixed bracket plate 4
is screwed into the bolt hole 14 of the boss portion 13. A spline shaft 8a is formed at the head of the hollow bolt 8.

A long hole 4a is formed in the overlapping surface of the anti-slip plate 7 and the reinforcing plate 6.
A plurality of grooves or teeth are provided extending in a direction perpendicular to the bracket, and the meshing of the teeth prevents the movable bracket 3 from slipping relative to the fixed bracket plate 4.

An upper steering barrel 2 that guides and supports the steering shaft 1 is inserted into a cylindrical portion 15 of the movable bracket 3 so as to be movable in the axial direction. A friction block 5 in contact with the outer circumferential surface of the upper steering tube 2 is housed in a cavity 16 formed in the cylindrical portion 15 of the movable bracket 3, and is frictionally engaged with the outer circumferential surface of the upper steering tube 2 by a small diameter bolt 9. However, the tip of the small diameter bolt 9 may directly abut the upper steering barrel 2.

The small diameter bolt 9 passes through the hollow bolt 8 and is screwed into the bolt hole 17 of the boss portion 13. Small diameter bolt 9
A spline shaft 9a is provided on the head of the shaft. However, for convenience of assembly, a plurality of protrusions are provided at intervals in the circumferential direction on the outer end side of the spline shaft 9a so as not to disengage from the adjustment knob 11. The adjustment knob 11 has a cavity 19 that accommodates the spline shaft 9a, and the spline shaft 9a is located at the entrance of the cavity 19.
A spline hole 11a is formed which engages with the spline hole 11a. A coil spring 10 is interposed between the inner end surface of the adjustment knob 11 and the anti-slip plate 7.

Next, the operation of the steering barrel inclination adjustment device according to the present invention will be explained. As shown in FIG. 1, the adjustment knob 11 is adjusted by the force of the spring 10 to
1a is removed from the spline shaft 8a of the hollow bolt 8 and the spline shaft 9a of the small diameter bolt 9. When the spline hole 11a is engaged with the spline shaft 8a or the spline shaft 9a, the longitudinal position or the vertical position of the steering shaft 1 can be adjusted.

Push the adjustment knob 11 to the right and insert the spline hole 11.
When a is engaged with the spline shaft 8a, the hollow bolt 8 is loosened by the adjustment knob 11, and the movable bracket 3 can be moved forward and backward relative to the fixed bracket plate 4. At this time, the hollow bolt 8 moves along the long hole 4a of the fixed bracket plate 4. When the hollow bolt 8 is tightened using the adjustment knob 11 while the handle is in an appropriate longitudinal position (inclination), the steering shaft 1 is fixed at that longitudinal position.

When the spline hole 11a of the adjustment knob 11 is engaged with the spline shaft 9a, the small diameter bolt 9 can be loosened. At this time, the frictional engagement force between the friction block 5 and the upper steering barrel 2 is released, so that the steering shaft 1 can be moved in the vertical direction (axial direction) together with the upper steering barrel 2 relative to the movable bracket 3. Handle 21
When the small diameter bolt 9 is tightened using the adjustment knob 11 at the appropriate vertical position, the friction block 5 is strongly frictionally engaged with the outer peripheral surface of the upper steering barrel 2, and the upper steering barrel 2 cannot be moved in the axial direction.

In this way, by selectively loosening the hollow bolt 8 or the small diameter bolt 9 using the adjustment knob 11 and moving the movable bracket 3 along the elongated hole 4a of the fixed bracket plate 4, the front and back position of the handle 21 can be changed to the position of the movable bracket 3. On the other hand, by moving the steering shaft 1 in the axial direction, the vertical position of the handle 21 can be adjusted independently.

[Effects of the invention] As described above, the present invention includes a movable bracket that is extrapolated to the upper steering barrel that supports the steering shaft, and a movable bracket that is attached to one surface of the fixed bracket plate that is fixed to the vehicle body and has an elongated hole in the longitudinal direction. The boss portions protruding laterally from the sides are abutted, the hollow bolt inserted through the elongated hole is screwed into the bolt hole of the boss portion, and the small diameter bolt inserted into the hollow bolt is inserted into the bolt hole passing through the boss portion. The adjustment knob is screwed into the bolt hole concentric with the bolt hole and the tip abuts against the upper steering barrel, and the adjustment knob is externally fitted onto the head of the small diameter bolt so as to be movable in the axial direction. It has a spline hole that selectively fits into the spline shaft, and the hollow bolt and small diameter bolt that fix the front and rear and top and bottom positions of the handle are placed concentrically, and the hollow bolt and small diameter bolt can be adjusted in a single manner. The knobs allow for separate loosening and tightening, making adjustment very easy and allowing for a very compact overall configuration.

[Brief explanation of the drawing]

FIG. 1 is a rear sectional view of a steering barrel inclination adjustment device according to the present invention, and FIG. 2 is a side view showing a schematic configuration of a conventional steering barrel inclination adjustment device. 1... Steering shaft, 2... Upper steering tube, 3... Movable bracket, 4... Fixed bracket plate, 4a...
Long hole, 8...Hollow bolt, 8a...Spline shaft, 9...Small diameter bolt, 9a...Spline shaft,
11...adjustment knob, 11a...spline hole, 1
3... Boss part, 14, 17... Bolt hole.

Claims (1)

[Scope of utility model registration request] A movable bracket is externally inserted into an upper steering barrel that supports a steering shaft, and a boss portion protruding laterally from the movable bracket is brought into contact with one surface of a fixed bracket plate that is fixed to the vehicle body and has an elongated hole in the longitudinal direction. A hollow bolt inserted into the elongated hole is screwed into a bolt hole in the boss part, and a small diameter bolt fitted into the hollow bolt is screwed into a bolt hole concentric with the bolt hole passing through the boss part, and the tip is screwed into the bolt hole in the boss part. The adjustment knob fits into the steering tube and is fitted onto the head of a small diameter bolt so that it can move in the axial direction.
A tilt adjustment device for a steering barrel, characterized in that a spline hole is provided to selectively fit into a spline shaft formed in each head of a hollow bolt and a small diameter bolt.