JPH0131585Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a steering handle locking device for a vehicle mainly used in construction work and agricultural work.

[Conventional technology]

Steering handle locking device 1 shown in FIG.
is attached to the top of the driver's cab 2 via a support stand 3, and holds a shaft cylinder 5 attached to the lower part of the driver's cab 2 so as to be movable back and forth on a support shaft 4. As shown in FIGS. 1 to 4, this steering wheel locking device has a pair of protruding plates 9, 9 protruding from a mounting seat 7 that is attached to a support base 3 and forming an arcuate hole 8. A bracket 10 having a large number of locking teeth 13 formed on the outer surface thereof is connected to a handle casing 11 attached to the shaft tube 5. That is, the side walls 12, 12 of the handle casing 11 are fitted to the outside of the pair of protruding plates 9, 9 of the bracket 10, and
The locking teeth of the square nut 14 fitted into one side wall 12 of the handle casing 11 and the locking teeth 13 of the protrusion plate 9 are made to face each other, and the nut 14 is further inserted into both circular arc holes 8, 8, and the side wall 12. The handle 18 is screwed onto the bolt 15 which is prevented from rotating by a locking protrusion 16 formed on the outer surface of the side wall 12, and a spring 19 interposed between the handle 18 and the nut 14 causes the nut 14 and the protrusion plate to be connected. The bracket 10 and the handle casing 11 are connected by meshing with the bracket 9 through locking teeth.

In this conventional device, the circular arc hole 8 of the bracket 10
Attach the bracket 10 using the vertically long bolt hole 6 of the mounting seat 7 so that the center of the arc is on the axis of the support shaft 4.
Adjusting the height position. Thereby, when the center of the arc of the arc hole 8 comes to the support shaft 4, the shaft tube 5 can be tilted at a desired angle by pushing and pulling the steering handle 20 in the front and back direction with the handle 18 loosened.

[The problem that the idea attempts to solve]

However, the center of the arc of the arc hole 8 may deviate from the axis of the support shaft 4 due to errors in manufacturing and assembly of the device. In this case, the bolt hole 15 and the arcuate hole 8 come into contact with each other, making it impossible to tilt the shaft cylinder 5 to a desired angle. Therefore, in the past, the dimensional tolerances between related members were set to be strict, which resulted in the drawback of requiring high-precision machining and increasing manufacturing costs.

This idea was made in view of the above circumstances.
To provide an inexpensive steering wheel locking device which enables tilting of a steering wheel even if the arcuate center of an arcuate hole does not pass through a support shaft.

[Means to solve the problem]

In order to achieve this purpose, the steering wheel lock device of the present invention includes a steering wheel casing which houses a steering wheel shaft and whose base is fixed to the middle part of a shaft cylinder which is attached to the driver's cab so as to be movable back and forth using a support shaft. The bases of the pair of arms are attached to the driver's cab so that they can move up and down, and the two arms have a long hole on the tip side and a large number of locking teeth along the long hole on the inner surface of one arm. A screw shaft with a handle is inserted into the elongated hole and rotatably attached to the handle casing, and the screw shaft is threaded onto the screw shaft, is prevented from rotating by a rotation stopper, and faces the locking teeth of the arm section with the locking teeth. It consists of nuts.

[Effect]

When the screw shaft with handle 36 is loosened, the nut 40
is disengaged from the locking tooth 29 of the bifurcated arm 22, so when the steering handle 20 is moved in the front and back direction, the screw shaft 36 with the handle is inserted into the elongated hole 2.
Move over 5. At that time, the screw shaft with handle 36
Even if the screw shaft 36 with handle comes into contact with the elongated hole 25,
Since the bifurcated arm 22 is rotated around the support shaft 35, the screw shaft with handle 36 moves along the elongated hole 25 of the bifurcated arm, and the shaft cylinder 5 can be tilted at a desired angle.

〔Example〕

Embodiments of the present invention will be described based on the drawings. In FIG. 5, the steering handle lock device connects a bifurcated arm 22 and a steering wheel casing 23, and the bifurcated arm 22 is attached to a bearing stand 21 attached to the top of the driver's cab 2 so as to be rotatable up and down.
The steering wheel casing 23 is the steering wheel 20
The handle shaft is mounted in the middle of a shaft cylinder 5 in which the handle shaft is housed.

As shown in FIGS. 6 and 7, the bifurcated arm 22 has a pair of arm portions 26 and 2 that have a spindle hole 24 at the base and an arcuate hole 25 from the middle to the tip.
6 are integrally connected by a connecting member 27 at the middle bottom part, and the circular arc hole 25 of one arm part 26
A large number of locking teeth 29 are formed in the vertical direction (perpendicular to the longitudinal direction) on the inner surface, and connecting members 2 are formed as necessary.
A notched groove 28 for loosely fitting the shaft cylinder 5 is formed on the tip side of the shaft 7, and the shaft cylinder 5 is attached to the bearing stand 21 with a support shaft 35 so as to be vertically rotatable.

In this embodiment, the bifurcated arm 22 is attached to the bearing stand 21 provided on the driver's cab 2, but it may be attached to the straight driver's cab 2. Further, the arcuate hole 25 of the bifurcated arm 22 is centered on the support shaft 4 that attaches the base of the shaft tube 5 to the driver's cab 2, but the two do not have to coincide; It may also be a hole.

As shown in FIGS. 5, 6, and 8, the handle casing 23 has a ceiling wall 32 formed with a shaft cylinder insertion hole 31 integrally attached to the upper surface of the U-shaped side wall 30, and side wall portions 33 on both sides. , 33, and insert the square-head screw shaft 36 into the bolt holes 34, 34 of the side walls 33, 33 and the circular arc holes 25, 25 of the bifurcated arm part 22, and then insert the square-head screw shaft 36 into the screw side. A bifurcated arm 2 with a handle 38 pivoted to the end.
Install 2. The threaded portion 36 is provided with a rectangular nut 40 that is screwed onto the threaded portion 37 and faces the locking teeth 29 of the arm portion 26 with the locking teeth 39, and a spacer 41 that limits the amount of movement of this nut. In addition, since the square nut 40 serves to prevent the ceiling wall 32 of the handle casing 23 from rotating, the nut 40
is engaged with and disengaged from the locking teeth 29 of the bifurcated arm by left and right rotation of the screw shaft 36.

Since this embodiment has the above-mentioned configuration, when passing through the arc central support shaft 4 of the arc hole 25 of the bifurcated arm 22 in FIG. Solve it,
By moving the steering wheel shaft 20 in the front and back direction,
The screw shaft 36 moves along the circular arc hole 25 and the shaft cylinder 5
can be tilted to a desired angle. In addition, if the arc center support shaft 4 of the arc hole 25 does not pass through, when the screw shaft 36 comes into contact with the arc hole 25 by operating the steering handle 20, the screw shaft 36 moves the bifurcated arm 22 around the support shaft 35. Since the screw shaft 36 is rotated to the circular arc hole 25
This allows the shaft cylinder 5 to be tilted at a desired angle. When the shaft cylinder 5 is tilted, the handle 38
is operated to engage the locking teeth 39 of the nut 40 with the locking teeth 29 of the bifurcated arm 22 to set the shaft cylinder 5.

[Effect of idea]

As explained above, according to the present invention, even if the arc center of the arc hole of the bifurcated arm is not on the axis of the support shaft, which is the rotation center of the shaft cylinder, for example, even if the arc hole is a straight long hole, the shaft Since the cylinder can be tilted, there is no need to make strict dimensional tolerances between related members, and manufacturing is facilitated. Therefore, this type of steering wheel can be reliably tilted with an inexpensive means, and an excellent effect can be achieved.

[Brief explanation of drawings]

Figure 1 is a side view of the conventional device, Figure 2 is a sectional view taken along line A-A in Figure 1, and Figure 3 is B in Figure 2.
4 is a perspective view of the bracket of the conventional device, FIG. 5 is a side view of the embodiment of the present invention, and FIG.
The figure is a sectional view taken along the line CC in Fig. 5, Fig. 7 is a perspective view of the bifurcated arm in the present invention, and Fig. 8 is a sectional view taken along the line C-C in Fig. 5.
It is a sectional view taken along the line DD in the figure. 2... Driver's cab, 4... Support shaft, 5... Shaft cylinder, 22
...Two-pronged arm, 23...Handle casing,
25...Long hole, 26...Arm part, 29, 39...
... Locking teeth, 36 ... Screw shaft with handle, 40
...Natsuto.

Claims (1)

[Scope of utility model registration request] The steering handle shaft is installed inside and the base is equipped with a support shaft 4.
The handle casing 23 is fixed to the middle part of the shaft cylinder 5 which is attached to the driver's cab 2 so as to be movable back and forth, and the bases of the pair of arm parts 26, 26 are attached to the driver's cab 2 so as to be rotatable up and down. 25, 25, and a bifurcated arm 22 formed with a large number of locking teeth 29 along a long hole 25 on the inner surface of one arm, and a bifurcated arm 22 that is inserted into the long holes 25, 25 of the bifurcated arm 22 and rotated to the handle casing 23. A screw shaft 36 with a handle attached thereto, and a locking tooth 29 of the arm portion 26 that is screwed onto the screw shaft 36 and is prevented from rotating by a rotation stopper.
and a nut 40 opposed by a locking tooth 39.