JPH06227449A - Traveling device for combine - Google Patents

Abstract

PURPOSE:To enable a smooth traveling turn by preventing a traveling crawler from sinking in even on the extremely soft soil. CONSTITUTION:The left and right traveling crawlers 4 in pair which are laid between a driving wheel 1, intermediate rolling wheel 3 and an edge part rolling wheel 2 are constituted so that a traveling crawler 4 on the turning inside is shifted to the rear side from a standard position and a traveling crawler 4 on the turning outside is shifted to the front side from a standard position by the traveling turning operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling device for combine harvesters, in which the left and right traveling crawlers can be moved from their reference positions to the front side and the rear side, respectively, so that the traveling crawlers can easily turn when traveling. It can be used for things like

[0002]

2. Description of the Related Art During the operation of a combine, in a headland etc. at the end of a field, a direction turning, that is, a turning turn by a running crawler for turning is repeatedly performed. However, normally, in this strike-turn turning, while the running crawlers on the inside of the turn are being braked, the running crawlers are driven about the center of the running crawlers by the drive of the running crawlers on the inside of the turn, and thereby the turning radius is changed. By making it smaller, the turning space is reduced as much as possible to improve field efficiency and work efficiency.

However, on an extremely soft soil surface, the traveling crawler repeatedly traverses the same traveling locus and repeatedly kneads the soil surface by repeating the above-described strike and turn, so that the conventional traveling device has a problem. , Inside the turn
The running crawler on the outside of the turning against the control force of the car slips because the necessary traction force cannot be obtained because the soil surface is soft, and it gradually dives into the soil surface and eventually becomes unable to travel. It will be.

Therefore, the present invention is intended to make it possible to perform a smooth strike turn without causing the running crawler to dive on the soil surface even when the strike turn is made on an extremely soft soil surface. .

[0005]

According to the present invention, a drive wheel 1 and an end roller 2, which are located at the front and rear, and an intermediate roller 3, which is located between them, are wound around and run on a soil surface. The pair of left and right traveling crawlers 4 are moved by a turning operation to move the inner traveling crawlers 4 from the reference position to the rear side and the outer traveling crawlers 4 to the front side from the reference position. The structure of the traveling device of the combine.

[0006]

With the above-described structure, the traveling crawler 4 can be operated because the soil surface is extremely soft when the strike and turn by turning is performed in the headland of the field at the time of operation of the combine. When the vehicle dives into the soil surface and the traveling is impeded, the pair of left and right traveling crawlers 4 is rotated from the normal reference position by, for example, parallel links, so that the traveling crawlers 4 on the inside of the turn are rearward. Further, by moving the traveling crawlers 4 on the outside and on the outside of the turning to the front side, the traveling turning by the traveling crawlers 4 can be easily performed.

In this way, when the vehicle is turning for turning, the pair of left and right running crawlers 4 are moved from the normal reference position to the running crawlers 4 on the inside of the turn to the rear side and the running crawlers on the outside of the turn. 4 is moved to the front side, the traveling crawlers 4 on the outside of the turn are positioned ahead of the traveling crawlers 4 on the inside of the turn. Therefore, as shown in FIG. In the case of, the traction force on the outside of the turn is [Fb = fb · r
b / Rb], and the traction force when moving from the reference position to the front and back is [Fa = fa · ra / Ra], and when the traveling crawler 4 is moved from the reference position to the front and back,
The turning resistance is reduced and it is possible to turn with a small traction force. Therefore, even when the soil surface is extremely soft,
The traveling crawlers 4 on the outside of the turning do not cut into the soil surface to cause slippage and dive into the soil surface, and can make a smooth strike turn with a small radius.

[0008]

EXAMPLES The present invention will be described with reference to the drawings with reference to a combine for performing a grain harvesting operation. A traveling device 6 having a pair of left and right traveling crawlers 4 traveling on the soil surface is arranged on the lower side of the combine chassis 5, and on this chassis 5,
Thresh the culms supplied by sandwiching them in the feed chain 7,
A threshing device 8 that sorts and collects the threshed grains is placed. Further, a reaping device 9 is provided on the front side of the threshing device 8 for weeding and raising to cut the culm, and the reaping device 9 that conveys the cut culm to the rear side and transfers it to the feeding chain 7 is provided on the soil surface. It is mounted on the front end of the chassis 5 so that it can be vertically moved up and down. In addition, an operating device 10 for controlling the operation of the combine and an operating product 11 for this operation are provided on one side of the threshing device 8, and these devices 6, 8,
A vehicle body 12 of the combine is constituted by 9 and 10.

Next, a traveling cross in the traveling device 6 is performed.
The structure related to LA4 will be described for the same shape on the left and right sides only. A straight traveling frame 13 extending and supported along the traveling crawler 4 in the front-rear direction by a downward step from the chassis 5 is provided, and is provided on the front side and the rear side of the traveling frame 13. Front rotation fulcrum 14 and rear rotation fulcrum 15
The intermediate portions of the front link arm 16 and the rear link arm 17 which are not vertically rotatable are pivotally supported, and the lower ends of the front and rear link arms 16 and 17 are respectively connected to the traveling frame. The front side extending relative to the frame 13 is rotatably attached to the relative position of a chrome frame 18 which is integrally formed in a reverse shape.

On the other hand, a traveling mission case 19 is arranged at the front position of the chassis 5, and the traveling mission case 19 is provided.
The upper end (20a) of an L-shaped side case 20 having a power transmission system for transmitting power to the drive wheels 1 for driving the traveling crawlers 4 is provided on the left and right sides of the transmission end portion of the free end flange type. A drive wheel shaft 21 for driving the drive wheel 1 is rotatably supported, and an L-shaped horizontal portion of the side case 20 is pivotally supported, and a shaft of the drive wheel shaft 21 protruding from the side case 20. The drive wheel 1 is axially fixed to the end.

A position 20b of the side case 20 near the end of the driving wheel 1 side and a front end of the crawler frame 18 which is inclined in an inverted V shape are rotatably pivoted. Along with the support connection, an adjustment arm 23 for adjusting the winding length of the traveling crawler 4 is slidable rearward from a receiving metal 22 provided on the upper end of the rear end of the crawler frame 18. The end roller 2 is rotatably mounted on the adjusting arm 23 so as to be rotatable between the rear end of the crawler frame 18 and an inverted bending point. In addition, a plurality of intermediate rollers 3 are rotatably supported at appropriate intervals. A running crawler 4 mainly made of a rubber material is wound around the end roller 2, the intermediate roller 3, and the drive wheel 1 to be disposed.

The upper and lower ends of the front link arm 16 and the rear link arm 17 pivotally supported by the traveling frame 13 are rotated by a connecting rod 25 provided with an adjuster 24 whose length can be adjusted. A telescopic cylinder which is freely connected to the rear portion of the connecting rod 25 to rotate the front and rear link arms 16 and 17 to swing the traveling crawler 4 in the front-back direction as the side case 20 rotates. A telescopic rod 26 is rotatably connected, and the fixed side of the telescopic cylinder 26 is fixed to a fixed metal 27 provided on the lower rear side of the chassis 5.

A rolling control mechanism (not shown) for controlling the left and right telescopic cylinders 26 separately to hold the vehicle body 12 tilted in the left and right direction in a horizontal state, and a left and right vehicle body 12 when the vehicle body 12 strikes and turns. And a turning control mechanism (not shown) for moving the traveling crawlers 4 of the vehicle 10 in opposite directions to each other in the front-rear direction are provided at arbitrary positions of the vehicle body 12, and the traveling steering of the vehicle body 12 is provided at an arbitrary position of the operation device 10. A power steering lever 28 for controlling the traveling and turning by hydraulic pressure is provided.

The operation of the above configuration will be described. Traveling device 6, threshing device 8, harvesting device 9, operating device 1
Although the harvesting work is performed by the action of 0, etc., the driving crawlers 4 are driven via the driving wheels 1 by the driving force transmitted from the traveling mission case 19 to the driving wheels 1 during the harvesting work. The vehicle body 12 is moved forward or backward.

When an extremely soft soil surface is encountered during traveling by the traveling crawler 4, the traveling crawler
La 4 sinks from the soil surface and the car body 12 rolls in the left-right direction.
In many cases, it becomes impossible to maintain the horizontal state by raising the ring, but at this time, the traveling crawler 4 on the side that is sunk by the action of the rolling control mechanism is expanded and contracted by the telescopic cylinder 26 so that the front and rear link arms 16, By rotating 17 to push down the crawler frame 18 against the traveling frame 13, the traveling crawler 4 is pushed down to hold the vehicle body 12 in a horizontal state.

While the work is being performed by these rolling controls, the turning and turning by the running crawler 4 is repeated to change the direction of the vehicle body 12, that is, to turn in the headland at the end of the field. However, on the extremely soft soil surface as described above at the time of this turning and turning, the running crawler 4 fixed at the normal reference position with respect to the braking force of the running crawler 4 on the inside of the turning. Since the soil proof strength is not sufficient to secure the driving traction force required by the traveling crawlers 4 on the outside of the turning, the traveling crawlers 4 cut through the soil surface to cause slip and dive into the soil surface.

At this time, the turning control is automatically performed by detecting the difference between the turning operation time performed by the operation of the power steering lever 28 at the time of the turning turn and the preset steering operation time when the vehicle body 12 goes straight ahead. By operating the mechanism, the left and right traveling crawlers 4 are moved oppositely in the front-rear direction. In this moving action, first, the telescopic cylinder 26 on the inside of the turning is extended to rotate both the front and rear link arms 16 and 17 upward, and this rotation causes the side casing at the transmission terminal end portion of the traveling mission case 19. The side case with the upper end 20a of the sleeve 20 as an axis.
At the same time that the case 20 is rotated rearward, this rotation causes the outer peripheral position 20 of the case on the side of the drive wheel 1 of the side case 20.
While rotating the front end portion of the crawl frame 18 at the case outer peripheral position 20b with b as the axis, the crawl frame 18, the outer drive wheel 1, the intermediate roller 3, and the end are rotated. It is moved to the rear side with respect to the traveling frame 13 together with the traveling crawler 4 wound around the partial wheel 2.

At the same time, the telescopic cylinder 2 on the outer side of the turning motion
6 is shortened so that the front and rear link arms 16 and 17 are both pivoted downward, and this pivot causes the upper end portion 20a of the side case 20 to be axially centered at the transmission terminal end portion of the traveling mission case 19. As the side case 20 is rotated forward, the side case 20 is rotated by this rotation.
With the outer peripheral position 20b of the case on the side of the drive wheel 1 as the axis,
While rotating the front end portion of the crawl frame 18 at the outer peripheral position 20b of the case, the crawl frame 1
8, the driving wheels 1, the intermediate rolling wheels 3, and the traveling rollers 4 wound around the end rolling wheels 2 are moved forward with respect to the traveling frame 13.

In this way, the left and right traveling crawlers 4 are moved to the rear side on the inside of the turn and to the front side on the outside of the turn, respectively, from the reference positions, and a right turn is made, for example, as shown in FIG. In this case, assuming that the braking force of the traveling crawler 4 on the inside of the turn is fa, the turning radius of the traveling crawler 4 on the inside of the turn from the center of turning is ra, and the traveling crawler 4 on the outside of the turn is 4 The turning radius of is Ra. At this time, the traction force Fa of the traveling crawler 4 on the outside of the turning is [Fa
= Fa · ra / Ra].

Comparing this with the case where the running crawler 4 makes a turn at the normal reference position, if the braking force of the running crawler 4 on the inside of the turn is fb, as shown in FIG. As a result, the turning radius of the running crawler 4 on the inside of the turning from the turning center is rb, and the turning radius of the running crawler 4 on the outside of the turning is Rb. Then, the traction force of the traveling crawler 4 on the outside of the turning at this time is [Fb = fb
・ Rb / Rb], and Fb / Fa = (fb ・ rb / Rb) / (fa ・ ra / R
a) If fa = fb, then Fb / Fa = (rb./Rb) / (ra / Ra) = rb
・ Ra / ra ・ Rb> 1 If rb ・ Ra / ra ・ Rb is assumed to be K, Fa = Fb / K⇒Fa> Fb By the above, the traveling crawler 4 is clearly moved in the front-rear direction as in this plan. However, the driving traction force during traveling and turning is smaller than that of the traveling crawler 4 at the normal reference position, and the traveling crawler even on an extremely soft soil surface.
It is possible to perform a smooth strike and turn with a small radius without breaking down the soil surface by the la 4 and causing a slip and diving into the soil surface.

Further, the forward and backward movement of the traveling crawler 4 is
A turning control switch or the like may be provided so that the turning control switch is used only when necessary. Further, the forward / backward movement of the traveling crawler 4 can be used not only during the normal turning direction but also during the single-point turning, that is, during the spin turn,
During such a spin turn, the inside and outside of the turning of the traveling crawlers 4 are driven in reverse to each other. Therefore, if the traveling crawlers 4 are moved in the traveling direction, a small driving traction force is required. A smooth spin turn can be performed.

[Brief description of drawings]

FIG. 1 is a side view showing the entire combine.

FIG. 2 is a side view showing a state in which the traveling crawlers move forward and backward.

FIG. 3 is a plan view showing a front-back movement operation state of the traveling crawler.

FIG. 4 is a plan view showing a turning action state of the traveling crawlers.

[Explanation of symbols]

 1 Drive Wheel 2 End Roller 3 Intermediate Roller 4 Running Crawler

Claims (1)

[Claims] 1. A drive wheel 1 and an end roller 2, which are located at the front and rear,
And a pair of left and right traveling crawlers 4 that wind around the intermediate rolling wheels 3 and travel on the soil surface, by a traveling turning operation, to move the traveling crawlers 4 on the inside of the turning from the reference position. A traveling device of a combine in which the traveling crawlers 4 on the outside of the turn are moved to the rear side from the reference position to the front side.