JPH0582773U - Tracked device for agricultural work vehicle - Google Patents

Abstract

(57) [Abstract] [Purpose] When the aircraft is turned, the aircraft does not pitch and it is possible to easily and smoothly make a turning turn. [Structure] In an agricultural work vehicle in which a crawler belt 1 is stretched around a drive sprocket 8 and an idler wheel 6, and a plurality of rolling wheels 15 for guiding a crawler belt are arranged on a track frame 10, the crawler belt 1
A tracked track device for agricultural work vehicles in which the cross-sectional shape of the lug 3 protruding from the ground contact surface side of the front side is looser than the front side with respect to the forward direction and the rear side is steeper than the front side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an agricultural work vehicle having an endless track type traveling device.

[0002]

[Prior Art]

 In the conventional traveling device for a tracked vehicle, the cross-sectional shape of the lug on the ground contact surface side of the crawler track has the same inclination angle with respect to the forward direction on both the front and rear sides.

[0003]

[Problems to be solved by the device]

 If the cross-sectional shape of the lug on the ground contact surface side of the track has the same inclination angle with respect to the forward direction on both the front and rear sides, as in conventional tracked vehicle running devices, drive the track on either the left or right side. However, when the track on the other side is braked to make a turning turn, the driving force generated on the lug on the driving side and the resistance received from the grounding surface on the braking side antagonize each other and the driving force cannot be exerted sufficiently, and the aircraft pitches. There was a problem that caused.

[0004]

[Means for Solving the Problems]

 The present invention relates to an agricultural work vehicle in which a crawler belt is stretched over a drive sprocket and an idler wheel, and a plurality of rolling wheels for crawler belt guides are arranged on a track frame. In the traveling device of a crawler track vehicle, the cross-sectional shape is set such that the angle of the front side with respect to the forward direction is gentler than the rear side and the angle of the rear side is steeper than the front side. The above-mentioned problem was solved by making the cross-sectional shape of the lug on the ground contact surface side of the forward direction smaller than the rear side with respect to the forward direction and making the angle behind the front side steeper.

[0005]

[Action]

 When driving the track on either the left or right side to rotate the vehicle and braking the track on the other side to make a turn, the rear angle of the lug on one track is steep, so the drive side Since the driving force generated on the lug of the vehicle is large and the angle of the front side of the lug of the other braking side crawler is gentler than the angle of the rear side of the driving side lug, the resistance that the aircraft receives from the ground contact surface when trying to move forward. Is less than the driving force of the crawler belt on the driving side, and the soil on the ground is allowed to escape rearward along the inclined surface of the lug so that the crawler belt on the braking side slides while being a resistor, making it easy and smooth. I made it possible to make a turning turn.

[0006]

【Example】

 Referring to the drawings, an embodiment of the present invention will be described. The crawler belt 1 is a pair of left and right rubber crawlers, and every other one on the outside ground side, the lugs 3 ... Every other piece has a lug 4 of about 1/2 width, an inner side has a cored bar 7 guided by a rolling wheel 5 and an idler wheel 6, and a central portion engages with teeth of a drive sprocket 8. . Are formed, and the arm supporting the two intermediate wheels 5, 5 is swingably supported by the horizontal shaft 5a.

The traveling frame comprises a main frame 2 and a pair of left and right track frames 10 which can move up and down with respect to the main frame 2. The track frame 10 is connected to the main frame 2 by two front and rear link arms. When the sensor detects the inclination of the main frame 2 and hydraulically operates the horizontal control cylinder 14, the left and right link arms are rotated to correct the inclination of the main frame 2, and the aircraft is kept horizontal while traveling. .

The non-grounded side of the crawler belt 1 is supported by the upper roller 11, and the push rod 12 projecting forward from the supporting portion of the idler wheel 6 at the rear is connected to the adjustment fitting 13 on the track frame 10 so as to be adjustable forward and backward. Therefore, when the crawler belts 1 and 1 are stretched, the idler wheel 6 is pushed out rearward by the adjusting metal fitting 13 so as to maintain an appropriate tension.

A drive sprocket 8 is attached to a drive shaft 16 extending from the transmission 15 to both sides, an idler wheel 6 is provided at a rear end portion of the track frame 10, and the crawler belt 1 is mounted between them. In an endless track type vehicle in which a plurality of rolling wheels 5 for guiding the crawler belts are arranged in the middle portion to run, the crawler belts 1 on either side are driven to rotate the vehicle, and the crawler belts 1 on the other side are driven. 2 and FIG. 3, the rear angle θ ₂ of the lugs 3 and 4 of the crawler belt 1 on one driving side is changed to the lug 3 of the crawler belt 1 on the other braking side when braking the vehicle. , 4 is steeper than the angle θ ₁ on the front side, even if the horizontal propulsion force P ₁ on the driving side of the ground portion and the horizontal resistance P ₂ from the soil on the braking side are the same value. , The driving force N ₁ generated on the driving lugs 3 and 4 is higher than the resistance N ₂ from the soil of the lugs 3 and 4 on the other braking side crawler belt 2. Therefore, it is possible to exhibit a large driving force sufficient for turning.

The angle θ _{1 on} the front side of the lugs 3 and 4 of the braking side crawler belt 1 is gentler than the angle θ ₂ on the rear side of the lugs 3 and 4 of the driving side crawler belt 1 on the other side. Not only is the resistance N ₂ received from the ground contact surface as the aircraft is moving forward less than the driving force N ₁ on the drive side, but also the cutting line force T _{2 that} causes the ground contacting soil to escape rearward along the inclined surface of the lug. Since the cutting line force T ₁ on the driving side is larger than that, the surfaces of the lugs 3, 4 of the crawler belt 1 on the braking side are made slippery, so that easy and smooth turning can be performed. As described above, by setting the angles of the front and rear of the lugs 3 and 4 to θ ₁ > θ ₂ , it was possible to sufficiently exert the traction force while going straight and to make a smooth turn when turning.

[0011]

[Effect of the device]

 The present invention relates to an agricultural work vehicle in which a track 1 is stretched on a drive sprocket 8 and an idler wheel 6, and a plurality of rolling wheels 15 for track guides are arranged on a track frame 10 in the agricultural work vehicle. With respect to the cross-sectional shape of the lug 3 projecting on the ground contact surface side, the angle from the rear side to the front side with respect to the forward direction was made gentler and the angle from the front side to the rear side was made steeper, so sufficient traction force was exerted during straight running, It became possible to make a smooth turn when traveling.

[Brief description of drawings]

FIG. 1 is a side view of a traveling device of an endless track vehicle.

FIG. 2 is a sectional view of a driving side lug.

FIG. 3 is a sectional view of a braking side lug.

FIG. 4 is a plan view of a part of the crawler belt.

[Explanation of symbols]

 1 crawler track 3 lug 5 rolling wheel 6 idler wheel 8 drive sprocket 13 adjustment fitting

Claims (1)

[Scope of utility model registration request] 1. A crawler belt 1 attached to a drive sprocket 8 and an idler wheel 6.
In an agricultural work vehicle in which a plurality of rolling wheels 15 for guiding the crawler belts are arranged on the track frame 10, the cross-sectional shape of the lug 3 protruding from the ground contact side of the crawler belt 1 is advanced. A crawler track device for agricultural work vehicles, characterized in that a front side angle is looser than a rear side direction and a rear side angle is steeper than a front side.