JPH0324458Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a front wheel steering angle adjustment device for a vehicle such as a tractor.

<Prior art> In a vehicle such as a tractor, a front wheel axle is provided at both ends of the front axle so as to be rotatable around a king pin, and while the front wheel is supported by the front axle, for example, a stopper bolt is screwed onto the front axle side. Normally, the lock nut is tightened and fixed, and the turning angle of the front wheels during steering is limited by a stopper bolt.

<Problems to be solved by the invention> Conventionally, the lock nut has been used only for locking, and after changing the tread of the front wheel, when adjusting the cutting angle of the front wheel accordingly, it is necessary to use a protractor etc. The work was complicated because the stopper bolt had to be adjusted to match the cut angle. Therefore, even if the tractor has an adjustable tread, it is actually difficult for the user to adjust the cutting angle of the front wheels to match the tread, and there are cases where the tractor is used at an inappropriate cutting angle.

Furthermore, conventionally, there was a gap between the head of the stopper bolt and the lock nut, and the shaft portion was exposed to the outside, so there was a risk that the stopper bolt would bend.

<Means for Solving the Problems> The technical means of the present invention to solve the problems of the conventional art is to move the front wheel axle 16 supporting the front wheel 13 to the front axle 5 around the king pin 10. The head 20 is rotatably provided on one side of the front axle 5 side and the front wheel axle 16 side, and the head 20 is in contact with the other side, so that the front wheel 1
In the front wheel cutting angle adjusting device in which the stopper bolt 19 that limits the cutting angle around the king pin 10 is adjustable and screwed together, the head of the stopper bolt 19 when the front wheel 13 is set to the required cutting angle; a seat surface 24 facing the head 20 of the member to which the stopper bolt 19 is screwed;
The stopper bolt 19 is provided with a distance setting member having dimensions corresponding to the distance between the stopper bolt 19 and the stopper bolt 19, and in surface contact with the head 20 and the seat surface 24, and surrounding the shaft portion 21 of the stopper bolt 19.

<Function> When adjusting the cutting angle of the front wheel 13, a gap setting member of a predetermined size is inserted into the head 20 of the stopper bolt 19.
The bolt 19 may be externally fitted onto the shaft portion 21 until it comes into contact with the space setting member, and then the shaft portion 21 of the bolt 19 may be screwed together until the spacing setting member comes into contact with the seat surface 24.

<Embodiment> Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. In Figs. A front axle 5 is swingably supported around a center shaft 4. The front axle 5 consists of a front axle main body 7 that houses a differential device 6, etc., and a telescopic part 8 that is telescopically fitted into both ends of this main body 7, and a gear case 9 is attached to the outer end of the telescopic part 8. .
The gear case 9 has an axis 11 of the king pin 10.
A front wheel case 12 is supported so as to be rotatable around the front wheel, and a front wheel 13 is mounted on a disk 1 in the front wheel case 12.
4. A front wheel axle 16 supported via a hub 15 is provided. The front wheel axle 16 is connected to the differential device 6.
It is designed to be driven by the power from the gear case 9 and the front wheel case 12 through a transmission mechanism.

13 is a steering arm, and a pair of left and right tie rods 17 are connected to the free end side of this steering arm. The tie rod 17 is telescopically adjustable and is connected to a knuckle arm 18 of the front wheel case 12.

Stopper bolts 19 are provided on both front and rear sides of the upper part of the gear case 6. The stopper bolt 19 is used to limit the cutting angle of the front wheel 13, and has a head 20 and a shaft 21 as shown in FIG. 3, and the shaft 21 is screwed into a screw hole 22 of the gear case 9. has been done. A lock nut 23 is screwed onto the shaft portion 21, and a collar 25 is fitted onto the outside of the shaft portion 21, and the lock nut 23 and the collar 25 constitute a spacing setting member. This spacing setting member is formed to have a dimension that matches the dimension between the head 20 and the seat surface 24 of the gear case 9 when the front wheel 13 is set at a predetermined angle.
The distance between the head 20 and the seat surface 24 is set by making contact with the head 20 and the seat surface 24. The lock nuts 23 are prepared in various sizes to match the angle of the front wheel 13. The collar 25 is for absorbing dimensional errors of the case and the like during initial cut angle setting, and may be omitted, in which case the lock nut 23 alone constitutes the spacing setting member.

In the above configuration, when the front wheel 13 is steered, the front wheel case 12 comes into contact with the head 20 of the stopper bolt 19 as shown in the imaginary line in FIG. It will never be. In addition, in this case, the front wheel case 12 is connected to the head 20.
Since the shaft portion 20 of the stopper bolt 19 is covered with the collar 25 and the lock nut 23, even if the stopper bolt 19 contacts the stopper bolt from an oblique direction, the stopper bolt 19
can prevent bending.

When adjusting the front wheel cutting angle, a lock nut 23 suitable for the cutting angle is selected from lock nuts 23 of various sizes prepared in advance and used. Then, the lock nut 23 is screwed onto the head 21 of the stopper bolt 19 so that the lock nut 23 contacts the head 20 side through the collar 25, and then the shaft portion 21 is attached to the gear case 9. It is sufficient to screw the lock nut 23 into the screw hole 22 until it comes into contact with the seat surface 24, and then tighten the lock nut 23. In this way, the same color 2
5, the cutting angle of the front wheel 13 can be uniformly adjusted by selecting the lock nut 23, and the work can be done easily and quickly.

The stopper bolt 19 may be attached to the front wheel case 12 side, and is not limited to the front wheel drive type.

<Effects of the invention> As described in detail in the embodiments above, according to the invention, the front wheel cutting angle can be adjusted easily and quickly by selecting the lock nut, and when the front wheel 13 is set to the required cutting angle, the steering angle can be adjusted easily and quickly. Parvolt 19 head 20
The cutting angle of the front wheel 13 can be adjusted by appropriately selecting a spacing setting member whose size corresponds to the spacing between the head portion 20 of the member to which the stopper bolt 19 is screwed and the seat surface 24 facing the seat surface 24. It can be set without using a protractor or the like, and the front wheel cutting angle can be adjusted easily and quickly.Moreover, since the spacing setting member makes surface contact with the head 20 and the seat surface 24, the stopper bolt 19
Even if the member of the front axle 5 and front wheel axle 16 on the side to which the stopper bolt 19 is not attached comes into contact with the head 20 from an oblique direction,
There is no risk that the shaft portion 21 of the stopper bolt 19 will bend, and since the shaft portion 21 of the stopper bolt 19 is surrounded by the spacing setting member, mud etc. may adhere to the shaft portion 21 and the stopper bolt It is not difficult to rotate the 19.

<Other Disclosures> FIG. 4 shows a shock absorber 26 made of hard rubber attached with a stopper bolt 19. The buffer body 26 has a cylindrical shape with a bottom, and the shaft portion 21 of the bolt 19 is inserted into a bolt hole 28 formed in the bottom portion 27 of the buffer body 26 .

In this way, the front wheel case 12 can be attached to the shock absorber 2.
Since it hits the stopper bolt 19 through the bolt 6, the impact at the time of contact can be alleviated. Therefore, front wheel case 1
Not only can it prevent damage to the part that directly corresponds to the stopper bolt 19 in No. 2, but it can also prevent the bolt at the case joint from loosening.
Since the load on the bolt 19 is reduced, the bolt 19 can also be made smaller.

[Brief explanation of drawings]

Figure 1 is a plan view showing one embodiment of the present invention;
The figure is a rear view of the same, and FIG. 3 is an enlarged view of the main parts.
FIG. 4 is a partially cutaway plan view showing another stopper structure. 5...Front axle, 6...Gear case, 10...
King pin, 12...Front wheel case, 13...Front wheel, 16...Front wheel axle, 19...Stopper bolt, 20...Head, 21...Shaft, 23...Lock nut.

Claims (1)

[Claims for Utility Model Registration] A front wheel axle 16 supporting the front wheel 13 is provided rotatably around a king pin 10 with respect to the front axle 5, and on one side of the front axle 5 side and the front wheel axle 16 side, head 2
0 is in contact with the other side and the king pin 10 of the front wheel 13
In a front wheel cutting angle adjusting device in which a stopper bolt 19 that limits the turning angle of the front wheel is adjustably screwed together, when the front wheel 13 is set to a required cutting angle, the head 20 of the stopper bolt 19 and the stopper bolt 19
has a dimension corresponding to the distance between the head 20 and the seat surface 24 facing the member to be screwed together, and is in surface contact with the head 20 and the seat surface 24, and has an axis of the stopper bolt 19. A front wheel cutting angle adjustment device comprising a spacing setting member surrounding a section 21.