JPH10119501A - Wheel device for mobile work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a segment type tire keeping the fitting strength of lug bodies satisfactory on a wheel. SOLUTION: This wheel device is provided with a segment type tire 18 fitted with multiple lug bodies 17 on the outer periphery of a rim 16. Each lug body 17 is provided with a fixed section 17 a rotatably fitted to the outer periphery of the rim 16 via a pivotal support shaft 19 and a lug section 17b bent outward on one end side of the fixed section 17a, and the fixed section 17a and the Jug section 17b of the adjacent lug bodies 17 are overlapped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural machine or a construction machine, and more particularly to a wheel device of a mobile working machine using a segment type tire having a plurality of lugs mounted on the outer periphery of a drum as wheels of a traveling vehicle. .

[0002]

In a segment type tire having a plurality of rectangular block-shaped lugs attached to the outer periphery of the rim, the lugs are usually directly fixed to the rim by bolts. However, in such a bolted structure, when a propulsion reaction force in the tangential direction of the wheel is applied to the lug body by the traction force of the traveling vehicle, the bending moment becomes large and the bolt is broken. In addition, there is a disadvantage that the work of attaching or removing the lug requires time and effort.

[0003]

SUMMARY OF THE INVENTION Accordingly, the present invention relates to a wheel device for a mobile work machine equipped with a segment type tire having a plurality of lugs attached to the outer periphery of a rim. The lug body has a fixing portion attached to the lug portion and a lug portion formed by bending one end side of the fixing portion outward, and is provided so that the fixing portion of the adjacent lug portion and the lug portion overlap. During running work with the wheels in contact with the ground, the ground load received by one lug is dispersed to other lugs that overlap, to eliminate the concentration of the load on one lug, and Even when a propulsion reaction force in the tangential direction of the wheel is applied to the lug body, the effect of the bending moment on the mounting part such as the pivot shaft is minimized to stably maintain this mounting. Easy attachment and detachment, and centering on the pivot By the rotation of the lug body was, in which the running performance by the wheel stably maintained by promoting separation of soil adhering to the lug body.

[0004]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory view of a lug body, FIG. 2 is an overall side view of a tractor, in which (1) is a tractor as a traveling body, (2) and (3) are front and rear wheels of the tractor (1), and (4).
Is a chassis which is a machine base on which the front wheels (2) are mounted; (5) is an engine mounted on the chassis (4); (6) is a power transmission case for mounting the rear wheels (3); Is a driver's seat mounted on the rear upper surface of the case (6), and (8) is a steering handle.

[0005] A front loader (9) is provided at the front of the tractor (1), and a tillable rotary working machine (1) is provided at the rear.
0) if necessary, and the bucket (11) of the front loader (9) is attached to the mounting frame (12) at the front of the tractor (1) by a pair of left and right lift arms (13).
It is configured to be capable of ascending and descending via a computer to perform various bucket operations such as loading of compost or the like or field equipment such as leveling or snow removal.

A tilling rotary working machine (10) having a tilling rotary (15) is supported at the rear of the tractor (1) via a three-point link mechanism (14) so as to be able to move up and down freely. The field is tilled by driving.

As shown in FIGS. 3 to 6, the rear wheel (3) has a plurality of rubber lugs (17) having the same width as the rim (16) attached to the outer peripheral surface of the rim (16) at equal intervals. The lug body (17) is equipped with a fixed part (17a) connected to a rim (16) via a pivot shaft (19), and a lug part (1) grounded to a field.
7b), the fixing part (17a) and the lug part (17b)
And a rising portion (17c) that interconnects them at the center.
In a sectional view, there is an upper and lower step between the fixing portion (17a) and the lug portion (17b), and the rising portion (17c)
The fixing portion (17a) and the lug portion (17
The lug (17) is formed in a bent shape to protrude, and a hollow portion (17d) similar in shape to the lug (17) is formed inside the lug (17).

A zigzag mounting bracket (20) is buried in the lower surface of the fixing portion (17a), and bent pieces at both ends of the mounting bracket (20) are inserted through left and right mounting slots (21) formed in the rim (16). (20a) is projected inside the rim (16), and the bent piece (20) is held by a pivot (22) such as a pin or a bolt.
a) is connected to the rim (16) so that it cannot be pulled out, and the lug (17) is attached to the rim (16) so as to be rotatable around the pivot shaft (19). Further, the fixed portion (17a) and the lug portion (17b) of the adjacent lug body (17) are arranged on the circumference of the rim (16) so as to wrap up and down, and the lug body (17) is grounded. The lug part (1
When a grounding load is applied to 7b), this load is distributed to the adjacent fixing portion (17a) that overlaps, and one lug body (1
While providing good support without concentrating the load on 7), the lug (17) moves from the ground contact position, and the pivot shaft (1) is moved.
When the lug body (17) rotates around the 9) and a gap is formed between the adjacent lug bodies (17), the lug body (17) is configured to promote the falling off of the soil attached to the lug body (17). I have.

The rim (16) is provided with left and right long holes (2).
1) A round hole (23) is formed between the left and right circular holes, and a square hole (24) is formed between the long holes (21) in the circumferential direction of the rim (16). The soil sandwiched between (16) and the lug body (17) has holes (23) (24)
Through the rim (16). (25) is a wheel disk.

[0010] Thus, one lug body (17) during work,
Even when a tangential propulsion reaction force (F) due to the traction force of the tractor (1) is applied, the adjacent overlapping lug (1)
7) The reaction force (F) is dispersed in the lug body (1) by minimizing the bending moment to the mounting part such as the pivot shaft (19).
The mounting strength of 7) can be stably maintained.

A lug (17) for the rim (16)
The mounting and dismounting can be easily performed by a simple operation of merely inserting and removing the pivot shaft (19), and the mounting and dismounting work can be performed with good work efficiency.

Further, when the rotation direction of the rear wheel (3) is reversed or the mounting direction of the lug body (17) is reversed in the front-rear direction, the rotation of the rear wheel (3) is indicated by a virtual line in FIG. As described above, the lug body (17) is in the rising posture to increase the tractive force.

[0013]

As is apparent from the above embodiments, the present invention relates to a wheel device of a mobile working machine equipped with a segment type tire (18) having a plurality of lugs (17) mounted on the outer periphery of a rim (16). , The rim (16) has a pivot shaft (1
The lug body (17) has a fixing portion (17a) rotatably mounted via the 9) and a lug portion (17b) formed by bending one end of the fixing portion (17a) outward. The fixing portion (17a) of the adjacent lug body (17) and the lug portion (17)
b) are overlapped with each other, so that during the traveling work with the wheels (3) grounded, another lug body that superimposes the grounding load received on one lug body (17) (17), the load can be prevented from being concentrated on one lug body (17).
Even when a propulsive reaction force in the tangential direction of the wheel (3) is applied to 7), the effect of the bending moment on the mounting portion such as the pivot shaft (19) can be minimized to stably maintain the mounting. The lug (17) can be easily attached and detached by the pivot shaft (19).
The rotation of the lug body (17) about 9) promotes the fall of the soil adhering to the lug body (17), and can stably maintain the running performance of the wheels.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a lug body.

FIG. 2 is an overall side view of the tractor.

FIG. 3 is an explanatory view of a rear wheel.

FIG. 4 is an explanatory perspective view of a lug body.

FIG. 5 is an explanatory sectional view of a rear wheel.

FIG. 6 is an explanatory diagram showing a state of polymerization of a lag body.

[Explanation of symbols]

 (16) Rim (17) Lug body (17a) Fixed part (17b) Lug part (18) Tire (19) Pivot shaft

Claims (1)

[Claims] In a wheel device of a mobile work machine equipped with a segment type tire having a plurality of lugs mounted on the outer periphery of a rim, a fixed portion rotatably mounted on a rim outer periphery via a pivot shaft, and the fixed portion. The lug body has a lug formed by bending one end of the lug outward, and is provided so as to overlap the fixing part and the lug of the adjacent lug. Wheel device.