JPH042101Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a protection device for a steering device.

(Prior Art) As a conventional protection device for a steering device, the front end of the steering arm that is linked to the steering wheel at the lower part of the vehicle body,
The inner ends of the pair of left and right tie rods are connected to the left and right front wheels and are inclined in the left and right direction so that they move forward as they go inward. Some vehicles have a plate-shaped protective guard placed below the vehicle body to protect them from obstacles in front of them (see Utility Model Application No. 184431/1983).

In the conventional system, the protective guard was a blind plate, so if it bends due to a large impact from an obstacle in front of it, the connecting part between the steering arm and the tie rod will interfere with the protective guard, causing the connecting part to There was a risk of damage due to the protective guard. Therefore, in the past, the protective guard had to be strong so that it would not easily bend even if it received an unexpected large impact force from an obstacle in front of it, and for this reason, it was necessary to make the protective guard thick. This made the manufacturing cost of the protective guard high.

Therefore, the present invention provides a protection device for a steering device in which even if the protective guard is bent, the connecting portion between the steering arm and the tie rod will not interfere with the protective guard and the connecting portion will not be damaged. The purpose is to

(Means for Solving the Problems) The specific features of the present invention in order to achieve the above object are as follows: The front end of the steering arm 20 interlocking with the handle 11 is located below the vehicle body 4. and,
A pair of left and right tie rods 22, 23 are connected to the left and right pair of front wheels 8, 8 and are inclined in the left and right direction so as to move forward as they move inward.
A protection device for a steering device in which a protection guard 35 is provided below from the vehicle body 4 side and protects the connection portion 36 from obstacles in front near the front. 35, an opening 37 corresponding to the connecting portion 36 is formed at the front thereof.

(Function) When the protective guard 35 bends due to an unexpected large impact force from a front obstacle, the opening 37 formed in the protective plate 35 connects to the connecting portion 36 between the steering arm 20 and tie rods 22 and 23. Correspondingly, interference between this connecting part 36 and the protective guard 35 is avoided.

(Example) Hereinafter, an example of the present invention will be described based on the drawings shown in FIGS. 1 to 6.

Figure 1 shows the front part of the tractor 1, with the engine 2
A vehicle body 4 is comprised of a transmission case 3 and the like, and the engine 2 is covered by a bonnet 5. A front axle bracket 6 is attached to the front end of the engine 2 so as to protrude forward, and a front axle case 7 is swingably supported on the front axle bracket 6. A front wheel 8 is mounted around a kingpin so that it can be steered.

A handle device 9 is provided at the rear end of the bonnet 5 and has a handle shaft 10, to which a handle 11 is fixed. This handle 11 has a rim 12 and a boss 13.
and spokes 14 connecting these,
The rim 12 and the boss 13 are separated from each other in the axial direction. Further, a pair of tapered holes 15, 15 that taper toward the other end are formed at each of the upper and lower ends of the boss 13 of the handle 11, and the tapered holes 15 are communicated with each other by a spline hole 16. ing. On the other hand, at the upper end of the handle shaft 10, a male threaded portion 17, a spline shaft portion 18 that fits into the spline hole 16, and a tapered portion 19 that fits into the tapered hole 15 are sequentially formed from above. . 40
is a fixing nut that is screwed into the male threaded portion 17. Therefore, as shown in FIGS. 1, 5, and 6, by turning the handle 11 upside down, the position of the rim 12 of the handle 11 can be changed in the vertical direction.

A steering arm 20 is disposed in the longitudinal direction below the front axle bracket 6, is attached to the front axle bracket 6 via a rotating shaft 21, and is swingable, and is attached via a drag link 41, a pitman arm, etc. The inner end portions 22a, 2 of a pair of left and right tie rods 22, 23 are connected to the handlebar 11, and are located at the lower front of the front axle bracket 6 at the front end.
3a are connected. This tie rod 22,2
The tie rods 22 and 23 have outer ends 22b and 22b attached to the knuckle arms 24 and 25, respectively. , 25 respectively connect the front wheels 8 and 8 to the king pin 2.
It is possible to steer around 6 and 27.

Further, each tie rod 22, 23 has turnbuckles 38, 39 for expansion/contraction adjustment at the midway point in the longitudinal direction.

A bumper 28 is attached to the front end of the front axle bracket 6 so as to project forward. This bumper 28 has a bumper body 29 that is U-shaped in plan view and an attachment portion 30 to the front end of the front axle bracket 6. 31 is a weight support plate, and the bumper body 2
A weight 32 is fixed to this support plate 31 with bolts 33.

35 is a protective guard, which covers the front end of the steering arm 20 and the inner ends 22a, 23 of the tie rods 22, 23;
It is located near the front of the connecting portion 36 with the bumper 28 to protect the connecting portion 36 from obstacles in front, and the mounting portion 30 of the bumper 28 is integrally provided below the connecting portion 36. . This protective guard 3
5 has a curved shape protruding forward in side view, and an opening 37 is formed at a position corresponding to the connecting portion 36 on the front side. The size of the opening 37 is such that the periphery of the opening 37 does not interfere with the connecting portion 36 when the protection plate 35 is bent backward.

The protection plate 35 may be separate from the bumper 28, or may be provided on the front axle bracket 6.

(Effect of the invention) In the present invention, the steering arm 20 is attached to the protective guard 35.
By forming a corresponding opening 37 near the front of the connecting portion 36 between the connecting portion 36 and the tie rods 22 and 23, when the protective plate 35 is bent due to an impact force from a front obstacle, the protective plate 35 and the connecting portion 36 Interference with the protective plate 35 can be avoided by the opening 37, and therefore there is no need to consider that the protective plate 35 receives an unexpected large impact force from a front obstacle. It can also be made thinner, reducing costs.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view showing the front part of the tractor, FIG. 2 is a partially sectional side view of the main part, FIG. 3 is a front view of the main part, and FIG. The figure is a plan view, FIG. 5 is an enlarged sectional view of the handle, and FIG. 6 is an enlarged sectional view showing an example of how the handle is used. 1...Tractor, 4...Vehicle body, 8...Front wheel, 1
1... Handle, 20... Steering arm, 22, 2
3...Tie rod, 35...Protection guard, 36...
...Connection part, 37...Opening part.

Claims (1)

[Claims for Utility Model Registration] Below the vehicle body 4, the front end of the steering arm 20 is linked to the handlebar 11, and the front end of the steering arm 20 is linked to the pair of left and right front wheels 8, 8, and moves forward as it goes inward. Inner end portions 22a, 23a of a pair of left and right tie rods 22, 23 are inclined in the left-right direction.
A protection device for a steering device in which a protective guard 35 is provided below from the vehicle body 4 side to protect the connecting portion 36 from obstacles in front near the front. A protection device for a steering device, characterized in that a corresponding opening 37 is formed at the front.