JP3770979B2 - Segmented tire for mobile work equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a segment type tire having a plurality of lug bodies attached to an outer periphery of a drum as a wheel of a traveling vehicle in an agricultural machine or a construction machine.
[0002]
[Problems to be solved by the invention]
In a segment-type tire in which a plurality of square block lugs, for example, are attached to the outer periphery of the rim, the lugs are usually bolted and fixed directly to the rim.
However, in such a bolted structure, when the reaction force in the tangential direction of the wheel due to the traction force of the traveling vehicle is applied to the lug body, there is a problem that the bolt breaks due to a large bending moment. In addition, there is a problem that it takes time and labor to attach or remove the lug body.
[0003]
[Means for Solving the Problems]
The problems to be solved by the present invention are as described above, and the present invention is configured as follows to solve the problems.
A segment type tire (18) having a plurality of rubber lugs (17) attached to the outer periphery of a rim (16), the rubber lugs (17) being pivotally supported on the rim (16) (19 ), A lug part (17b) for grounding to the field, and a rising part (17c) for connecting the fixing part (17a) and the lug part (17b) to each other at the center. In addition, an upper and lower step is provided between the fixing part (17a) and the lug part (17b) in a side sectional view, and the fixing part (17a) and the lug part ( 17b) is formed in a bent shape, the mounting bracket (20) is embedded in the lower surface of the fixed portion (17a), and the mounting bracket (20) is formed from the left and right mounting holes (21) formed in the rim (16). ) Protrudes inside the rim (16) and is removed by the pivot shaft (19). The bracket (20) is connected to the rim (16) so that it cannot be pulled out, and the fixing portion (17a) and the lug portion (17b) of the adjacent lug body (17) are moved up and down on the circumference of the rim (16). It is arranged to wrap with .
Therefore, the present invention relates to a wheel device for a mobile work machine equipped with a segment type tire having a plurality of lug bodies attached to the outer periphery of the rim, and a fixing portion that is rotatably attached to the outer periphery of the rim via a pivot shaft. The lug body has a lug portion formed by bending one end side of the lug outward, and the work is performed by grounding the wheel by providing the fixing portion and the lug portion of the adjacent lug body to overlap each other. Inside, the contact load received by one lug body is distributed to the other lug bodies to be superposed to eliminate the concentration of the load on one lug body.
In addition, even when a thrust reaction force in the tangential direction of the wheel is applied to the lug body, the influence of the bending moment on the mounting part such as the pivot shaft is minimized, and this mounting is stably maintained. In addition to facilitating the attachment and detachment of the body, the rotation of the lug body around the pivot shaft facilitates the removal of the soil adhering to the lug body to stably maintain the running performance by the wheels.
[0004]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings.
1 is an explanatory diagram of a lug body,
2 is an overall side view of the tractor. In the figure, (1) is a tractor as a traveling machine body, (2) and (3) are front and rear wheels of the tractor (1), and (4) is a front wheel (2). (5) is an engine mounted on the chassis (4), (6) is a power transmission case for mounting the rear wheel (3), and (7) is a rear upper surface of the case (6). A driver's seat to be attached to (8) is a steering handle.
[0005]
A front loader (9) is provided at the front of the tractor (1), and a tillage rotary working machine (10) is provided at the rear as required. The bucket (11) of the front loader (9) is attached to the tractor ( 1) The front mounting frame (12) of 1) is supported by a pair of left and right lift arms (13) so as to be movable up and down, and is configured to perform various bucket operations such as loading of compost or field equipment such as leveling or snow removal. is doing.
[0006]
Further, a tilling rotary working machine (10) having a tilling rotary (15) is supported by a rear portion of the tractor (1) via a three-point link mechanism (14) so that the tilling rotary (15) can be raised and lowered, and the tilling rotary (15) during driving is driven. Therefore, it is configured to cultivate the field.
[0007]
As shown in FIGS. 3 to 6, the rear wheel (3) is a segment in which a plurality of rubber lugs (17) having the same width as the rim (16) are mounted at equal intervals on the outer peripheral surface of the rim (16). The lug body (17) includes a fixed part (17a) connected to the rim (16) via a pivot shaft (19), and a lug part (17b) to be brought into contact with a farm field. The rising portion (17c) connects the fixing portion (17a) and the lug portion (17b) to each other at the center.
In a cross-sectional view, there is an upper and lower step between the fixing part (17a) and the lug part (17b), and the fixing part (17a) and the lug part (17b) are projected in the opposite directions around the rising part (17c). It is formed in a bent shape, and a hollow portion (17d) similar in shape to the lug body (17) is formed inside the lug body (17).
[0008]
A hook-shaped mounting bracket (20) is embedded in the lower surface of the fixed portion (17a), and bent pieces (20a) at both ends of the mounting bracket (20) from the left and right mounting elongated holes (21) formed in the rim (16). The rim (16) is projected inward, and the bent piece (20a) is connected to the rim (16) with a pivot shaft (22) such as a pin or a bolt so that it cannot be removed, and is pivotally supported on the rim (16). A lug body (17) is attached so as to be rotatable about an axis (19). Further, on the circumference of the rim (16), the fixing portion (17a) and the lug portion (17b) of the adjacent lug body (17) are arranged so as to wrap up and down, and the lug body (17) is grounded. When the grounding load is applied to the lug portion (17b), the load is distributed to the adjacent fixing portion (17a) to be superposed and the load is not concentrated on one lug body (17). On the other hand, the lug body (17) moves from the ground contact position, and the lug body (17) rotates around the pivot shaft (19) to form a gap between the adjacent lug bodies (17). The soil attached to the lug body (17) is facilitated.
[0009]
The rim (16) has round left and right holes (23) formed between the left and right elongated holes (21), and between the left and right elongated holes (21) in the circumferential direction of the rim (16). A rectangular punch hole (24) is formed so that the soil sandwiched between the rim (16) and the lug body (17) is pulled out to the inside of the rim (16) through the respective punch holes (23) (24). is doing. Reference numeral (25) denotes a foil disk.
[0010]
Thus, even when a tangential propulsion reaction force (F) due to the traction force of the tractor (1) is applied to one lug body (17) during work, the reaction force ( F) is dispersed, and the bending moment to the mounting portion such as the pivot shaft (19) can be minimized, and the mounting strength of the lug body (17) can be stably maintained.
[0011]
Further, even when the lug body (17) is attached to and detached from the rim (16), the lug body (17) can be easily operated by simply inserting and removing the pivot shaft (19). The efficiency can be improved.
[0012]
Further, the rotation direction of the rear wheel (3) is reversed or the attachment direction of the lug body (17) is reversed in the front-rear direction, so that when the rear wheel (3) is rotated, as shown by the phantom line in FIG. The body (17) is in a standing posture to increase the traction force.
[0013]
【The invention's effect】
As is apparent from the above embodiments, the present invention is a segment type tire (18) in which a plurality of rubber lugs (17) are attached to the outer periphery of the rim (16), and the rubber lugs (17) The fixed part (17a) connected to the rim (16) via the pivot shaft (19), the lug part (17b) to be grounded to the field, the fixed part (17a) and the lug part (17b) at the center A rising portion (17c) connected to each other, and a vertical step is provided between the fixed portion (17a) and the lug portion (17b) in a side sectional view, and the rising portion (17c) is the center. The left and right sides are formed on the rim (16) by forming a bent shape in which the fixing portion (17a) and the lug portion (17b) protrude in the opposite direction, and the mounting bracket (20) is embedded in the lower surface of the fixing portion (17a). From the mounting hole (21), attach the mounting bracket (20) to the rim (16). It protrudes inward and the mounting bracket (20) is connected to the rim (16) through the pivot shaft (19) so that it cannot be pulled out, and the adjacent lug body (17) is fixed on the circumference of the rim (16). Since the part (17a) and the lug part (17b) are arranged so as to wrap up and down, during traveling work with the wheel (3) grounded, one lug body (17) It is possible to eliminate the concentration of the load on one lug body (17) by dispersing the received ground load on the other lug bodies (17) to be superposed.
In addition, even when a thrust reaction force in the tangential direction of the wheel (3) is applied to the lug body (17), the effect of the bending moment on the mounting portion such as the pivot shaft (19) is minimized to stabilize the mounting. Can be maintained.
Further, the lug body (17) can be easily attached and detached by the pivot shaft (19), and the lug body (17) is rotated by the rotation of the lug body (17) around the pivot shaft (19). The running performance of the wheels can be maintained stably by promoting the falling off of the soil adhering to the wheel.
[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 diagram of a rear wheel.
FIG. 4 is an explanatory perspective view of a lug body.
FIG. 5 is a cross-sectional explanatory view of a rear wheel.
FIG. 6 is an explanatory view showing a polymerization state of a lag body.
[Explanation of symbols]
(16) Rim (17) Lug body (17a) Fixed part (17b) Rug part (18) Tire (19) Pivot shaft

Claims (1)

A segment type tire (18) having a plurality of rubber lugs (17) attached to the outer periphery of a rim (16), the rubber lugs (17) being pivotally supported on the rim (16) (19 ), A lug part (17b) for grounding to the field, and a rising part (17c) for connecting the fixing part (17a) and the lug part (17b) to each other at the center. In addition, an upper and lower step is provided between the fixing part (17a) and the lug part (17b) in a side sectional view, and the fixing part (17a) and the lug part ( 17b) is formed in a bent shape, the mounting bracket (20) is embedded in the lower surface of the fixed portion (17a), and the mounting bracket (20) is formed from the left and right mounting holes (21) formed in the rim (16). ) Protrudes inside the rim (16) and is removed by the pivot shaft (19). The bracket (20) is connected to the rim (16) so that it cannot be pulled out, and the fixing portion (17a) and the lug portion (17b) of the adjacent lug body (17) are moved up and down on the circumference of the rim (16). A segmented tire for a mobile work machine, characterized by being arranged so as to wrap around.

Images