JPS586723Y2 - Tractor auxiliary wheel attachment/detachment device - Google Patents

Description

[Detailed description of the invention] A normal automobile or tractor wheel has through holes drilled into it that fit six bolts, and after engaging the through holes with the bolts, tighten and secure with nuts. are doing.

In this case, even if a groove is formed in the side surface of the bolt and the engaging member is engaged with the groove without using a nut, the bolt will not come out and the two can be fixed.

In other words, if the bolt is just a round rod and an engagement groove is cut into the side surface of the rod, and if the groove is engaged with a cotter pin or the like, the two become fixed together, so it is very easy to use. It can be easily combined.

Generally, the auxiliary wheels of a tractor are so heavy that only two people can lift them, so the method of tightening six nuts on six bolts one by one is not used, as is the case with automobile tires.

A simple method of joining as described above would be appreciated.

By the way, when this was implemented, there was no problem when driving on the road, but there was a defect that it came off during land leveling work in paddy fields.

That is, since the fixing means is simply the engagement of the engagement member with the engagement groove, the engagement member will come off when kneaded in the paddy field.

For example, in the attachment/detachment device described in Japanese Utility Model Application Publication No. 53-128202, when the wheel rotates and the rotating piece becomes submerged in the mud, the reaction force of the mud acts on the rotating piece, causing the rotating piece to slip into the mud. This causes the rotary piece that engages with the cut groove to easily come off.

Therefore, in the present invention, a seat plate 2 having a diameter smaller than that of the wheel 1 is attached to the outside of the wheel 1 of the tractor so that its center coincides with the center of the wheel 1, and the seat plate 2 is provided with several horizontal protrusions 3. are provided protrudingly at equal intervals on the circumference centered on the wheel shaft, and the horizontal protrusions 3 are provided on the separately formed auxiliary wheel 5.
When a through-hole into which is fitted is bored and the horizontal protrusion 3 is fitted into the through-hole, the side surface of the portion of the horizontal protrusion 3 that protrudes from the through-hole and is farthest from the wheel 1 axis position. An auxiliary wheel attachment/detaching device for a tractor is constructed in which an engagement groove 8 is formed on the outside and a hook 9 for preventing slippage is engaged with the engagement groove 8.

To explain with a diagram, 1 is the tractor wheel (tire)
A seat plate 2 is fixed to the outside of the seat plate 2 in alignment with the center of the wheel 1.

The seat plate 2 may be fixed in any manner, and may be fixed using separately prepared bolts and nuts.

Several engaging horizontal protrusions 3° 3 . . . are made to protrude from the seat plate 2.

The protrusions 3, 3, . . . are arranged at four to six positions at equal intervals on a circumference centered on the axle of the wheel 1.

The protrusions 3, 3 are not very long but have a short length, and the tip portions are formed in the tipper part 4.

A contact plate 6 is vertically provided on the contact side of the auxiliary wheel 5 formed in a normal shape.

The abutment plate 6 is provided with the same number of through holes 7 as the number of projections 3 into which the horizontal projections 3, 3, . . . fit.

Is it the through hole of the contact plate 6? , 7... as the horizontal protrusion 3
, 3 and when the auxiliary wheel 5 is coupled, an engagement groove 8 is carved in the protruding portion of the horizontal protrusion 3 that faces outward when viewed from the axis position of the auxiliary wheel 5. .

A U-shaped hook 9, which is an engagement plate, is fixed with a shaft 10 at a position near the axis where the through holes 1 and 7 of the contact plate 6 are bored, and this is rotated. At this time, it is attached so as to be engaged with the engagement groove 8, and a linear abutment surface 11 is formed on a part of the abutment surface 11, and the bullet 12 is brought into contact with this.

One end of the bullet 12 is fixed to a support 13, and the other end is inserted into and supported by a support 14 so as to be freely removable.

Since the present invention has the above-described configuration, when the seat plate 2 is fixed to the tractor wheel 1 with bolts and nuts, the horizontal protrusions 3, 3, etc. attached to the seat plate 2 are shaped to protrude outward. Become.

Next, when the auxiliary wheel 5 is lifted and the through holes 1 and 7 formed in the contact plate 6 are applied to the projections 3 and 3, and these are pushed in, the two are combined.

Next, when the hook 9 is rotated with a fingertip and engaged with the engagement grooves 8, 8, both are fixed.

When driving through the paddy field in this state, the auxiliary wheels 5 are buried in the mud, and are therefore lifted up from below by the mud, pushing the hooks 9; Since it is in a state of being engaged with the upper engaging groove 8, it will rather just try to fit strongly into the engaging groove 8 and will never come off.

Among the above-mentioned structural functions, the present invention is particularly characterized in that the engagement groove 8 of the hook 9 is formed on the outside when viewed from the axial center position.

That is, the lower part of the wheel 5 shown in FIG. lower hook 9
is lifted upward by the friction with the mud, so that the hook 9 moves in a direction away from the engagement groove 8.

In contrast, in the case of the present invention, even if the wheel 5 sinks into the mud and the hook 9 is lifted due to friction with the mud, the engagement groove 8
Since it is formed on the outside, it can be pressed more and more, which means that it will become more deeply engaged, making it difficult to come off.

[Brief explanation of the drawing]

Fig. 1 is a partial front view of the auxiliary wheel, Fig. 2 is a side view of the seat plate attached to the tractor wheel, Fig. 3 is a perspective view of the hook, which is an engaging member, and Fig. 4 is a side view of the same. FIG. 5 is a sectional view of the abutment plate. Explanation of symbols: 1...Wheel, 2...-Seat plate, 3...Horizontal protrusion, 4...Part of teeper, 5...・Auxiliary wheel, 6...Abutment plate,
7... Through hole, 8... Engagement groove, 9...
...Hook, 10...Shaft, 11...
- Contact surface, 12... Bullet ray, 13... Support tool, 14... Support body.

Claims (1)

[Scope of utility model registration request] A seat plate 2 having a smaller diameter than the wheel 1 is provided on the outside of the wheel 1 of the tractor.
is attached so that its center coincides with the center of the wheel 1, and several horizontal protrusions 3 are protruded from the seat plate 2 at equal intervals on a circumference centered on the wheel axis, and separately The formed auxiliary wheel 5 is provided with a through-hole into which the horizontal protrusion 3 fits, and when the horizontal protrusion 3 is fitted into the through-hole lower part,
An engaging groove 8 is provided on the side surface of the portion of the horizontal protrusion 3 that protrudes from the lower through-hole, and on the outer side of the far side when viewed from the wheel 1 axis position.
is formed, and a hook 9 for preventing slipping out is engaged with the engagement groove 8,
A tractor auxiliary wheel attaching/detaching device in which a bullet 12 that maintains the engagement state with the engagement groove 8 is brought into contact with the hook 9.