JPS632322Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is characterized in that a propulsion wheel with a large diameter lug is attached to the end of an axle extending laterally outward from a transmission case, and the propulsion wheel with a large diameter lug is connected to the transmission case. This relates to a structure for attaching a small-diameter lug-equipped propulsion wheel 10 to an axle portion between the two.

In general, the wheels used in rice transplanters are propulsion wheels with multiple lugs in order to obtain propulsion force in wet fields, and while suppressing vibrations when running on the road, In order to achieve stability, the wheels at the end of the axle have a large diameter, and the wheels between the wheels at the end of the axle and the transmission case have a small diameter. Conventionally, this type of mounting structure In this type of conventional wheel mounting structure, each of the propulsion wheels is individually fixed to the axle through keys, pins, etc. so that they rotate integrally. The vertical impact force acting on the wheel located on the lateral outer side concentrates as a large bending moment on the pin holes and key grooves formed in the axle to secure the inner wheel, and by repeating this, the axle There was a problem that caused cracking and deformation.

In view of the above-mentioned circumstances, the present invention maintains the desired torque transmission from the axle to each propulsion wheel in a reliable and strong manner, while suppressing deformation of the axle as much as possible, significantly increasing durability. Have a purpose in trying to improve.

That is, in the wet field wheel mounting structure according to the present invention, in the above-described one, the large-diameter lug-equipped propulsion wheel located at the outermost side of each of the propulsion wheels is fixed to the axle, and the large-diameter lug is fixed to the axle. Flange-shaped flange joints that are in surface contact with each other are integrally formed on the opposing ends of the boss portion of the lug-equipped propulsion wheel and the boss portion of the inner small-diameter lug propulsion wheel loosely fitted onto the axle, respectively. The two propulsion wheels are fixedly connected to rotate integrally through a flange joint, and torque is transmitted from the outer wheel fixed to the axle to the inner adjacent wheel loosely fitted to the axle. Although this is done reliably and strongly through the flange joint, there is no pin hole or keyway for fixing the inner wheel to the axle portion located between the outer wheel and the transmission case. Since there is no need to form any axles, it is possible to sufficiently suppress bending deformation of the axle caused by the concentration of bending moment acting there during driving, even for axles with the same diameter as conventional ones, and improve the durability of the axle. This has led to a remarkable improvement in performance.

Hereinafter, an embodiment of the present invention will be described based on the drawings. At the rear of the traveling body 1, a parallel quadruple link mechanism 2 and a hanging link mechanism 3 having an approximately inverted trapezoidal shape when viewed from the front are provided.
In a riding rice transplanter in which a six-row planting device 4 is connected to the rice transplanter 4 so as to be capable of driving up and down and rolling freely, the traveling body 1 is constructed as follows.

That is, a pair of left and right steering propulsion wheels 7, 7 configured to straddle two wheels is installed at the front of the transmission case 6 which is linked to the engine 5, and
A pair of left and right transmission cases 8, 8 extends rearward from the transmission case 6, and these transmission cases 8, 8
The axles 9, 9 extending laterally outward from the
Propulsion wheels 10, 10 with lugs 10a configured to straddle a row, and propulsion wheel 1 with lugs 11a having a smaller diameter and configured to straddle two rows.
1 and 11 are mounted so as to rotate together.

Thus, the rear propulsion wheels 10, 11 and 1
Large diameter wheel 1 located on the outer side of 0,11
0, 10 are fixed to the axles 9, 9 via keys 12, 12, and the outer wheels 10, 10
boss portions 10A, 10A of and boss portions 11 of inner adjacent wheels 11, 11 loosely fitted to the axles 9, 9;
A, 11A are connected to the bolts/nuts 15, 1 through flange joints 13, 14 which are in surface contact with the axles 9, 9 in a plane perpendicular or almost perpendicular to the axles 9, 9.
6. They are fixedly connected in a state of integral rotation.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the wet field wheel mounting structure according to the present invention, and FIG. 1 is an overall side view of a riding rice transplanter;
FIG. 2 is a partially cutaway front view of the main part. 8...Transmission case, 9...Axle, 10, 11...
... Propulsion wheel with lugs, 10A, 11A... Boss portion, 13, 14... Flange joint.

Claims (1)

[Scope of utility model registration request] A large diameter lug propulsion wheel 10 is attached to the end of an axle 9 extending laterally outward from the transmission case 8, and a large diameter lug propulsion wheel 10 is attached to the axle portion between the large diameter lug propulsion wheel 10 and the transmission case 8. The structure is for attaching a small-diameter lug-equipped propulsion wheel 11, and among the respective propulsion wheels 10, 11, the large-diameter lug-equipped propulsion wheel 10 located at the outermost side is attached to the axle 9.
At the same time, the opposing ends of the boss portion 10A of the large-diameter lug propulsion wheel 10 and the boss portion 11A of the inner small-diameter lug propulsion wheel 11 loosely fitted onto the axle 9 are brought into surface contact with each other. Flange-shaped flange joints 13 and 14 are integrally formed, and both propulsion wheels 1 are connected via these flange joints 13 and 14.
A wet field wheel mounting structure characterized in that 0 and 11 are fixedly connected to rotate integrally.