JPH0558354A - Crawler type running device - Google Patents

Abstract

PURPOSE:To provide a crawler which performs running on an adverse road, and running across a ridge between rice fields, reversal of a direction (turning of a car body) safely and reliable and besides in a state that a rice field surface may be ruptured to possible minimum extent during turning. CONSTITUTION:A crawler type running device is formed in such a way that a crawler 3 is arranged in a state to run around the one side drive sprocket 1 and the other side stretch rolling wheel 2; a plurality of central rolling wheels 4 to guide the lower part of the intermediate part of the crawler 3 are maintained vertically movably and regulatably and located in a state to be stretched downward; and a pair of front and rear rolling wheels 5 and 6 respectively arranged on the front and the rear side of the central rolling wheel 4 form a bogie type where the rolling wheels are rockable around the intermediate part of a mounting arm 7 serving as a fulcrum (a).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler type traveling device, and is used for a traveling vehicle body such as a combine.

[0002]

2. Description of the Related Art A conventional device of this type, for example,
According to the construction described in Japanese Patent No. 2291, the roller roller located on the center side in the front-rear direction of the crawler is replaced by another roller.
Crawler supporting a roller and a crawler wheel
It is separated from the la-frame and is axially supported by another member. An up-and-down telescopic operating device is provided between the shaft-supporting portion of the center side roller and the crawler frame. -The center side roll so that the front and rear sides of the lash float.
The cradle frame can be raised with respect to the drawer.

[0003]

[Problems to be Solved by the Invention]
La is intended to safely and reliably drive on rough roads, over ridges, and change direction (vehicle body turning), and at the same time as much as possible without destroying the surface of the field during turning. Especially, when the chlora according to the present invention is attached to a combine,
The object of the present invention is to embody a device that can safely run even in a state of turning in a field and climbing over a ridge when moving from one field to the next without breaking the field surface.

[0004]

The present invention takes the following technical means in order to achieve the above object. That is, one drive sprocket 1 and the other tension roller 2
And a plurality of central rollers 4 which guide the lower part of the intermediate portion of the crawlers 3 and are vertically tensioned downwardly so that the central rollers 4 can be adjusted vertically. 4, a pair of front wheels 5 and rear wheels 6 provided on the front side and the rear side, respectively.
Is a crawler-type traveling device in which a swinging free bogie is formed with an intermediate portion of the mounting arm 7 as a fulcrum a.

[0005]

EXAMPLE First, the structure will be described. The drive sprocket 1 is configured to be driven by bearings on an axle of a mission case 10 provided in the front part of a chassis 9 as is conventionally known. Although not shown, left and right side clutches and side brakes provided inside -Connected to the key, the left and right power can be turned on and off individually or braking can be applied.

[0006] The tension roller 2 is a traveling frame 11 of the chassis 9.
It is provided at the rear of the car so that it can be moved back and forth. The crawler 3 is made of rubber as an endless belt and is wound around the drive sprocket 1 and the tension roller 2. The central rolling wheel 4 connects the three rolling wheels 4a, 4b, 4c to the connecting body 12
Bearing inside and arranged inside the intermediate portion of the crawler 3,
It is supported by a swing arm 8 provided at the axis of the wheel 4b. The swing arm 8 is bent in a dogleg shape, the middle portion is pivotally attached to the machine body, and the hydraulic device 13 is connected to the other end to swing the swing arm 8.

The hydraulic device 13 is connected to the connecting body 1 by pressure oil, like the switching valve 14a shown in the hydraulic circuit of FIG.
2 is extended so that it can be moved downward, but on the contracted side, oil can be returned to the tank so that it can be freely contracted. The swing arm 8 is supported by a buffer spring 15 and is tensioned downward so as to keep the central roller 4 at the same level as the front roller 5 and the rear roller 6.

Therefore, the central wheels 4a, 4b, 4c
Can be moved below the front wheel 5 and the rear wheel 6 by the operation of the hydraulic device 13, and when the switching valve 14a is set to neutral, the oil returns to the tank and the buffer spring 15 acts. There is. The arrangement of the hydraulic device 13 and the buffer spring 15 is as shown in FIG.
It is provided on both sides of the traveling frame 11 and is housed within the width of the crawler 3.

The front roller 5 is constructed in a swingable bogie type by pivotally attaching a V-shaped mounting arm 7 having two rollers 5a and 5b axially attached to both ends to the body. ing. Next, rear wheel 6
In the same manner as the front wheel 5, the helix-shaped mounting arm 7 having the two wheels 6a and 6b axially attached to both ends is pivotally attached to the body to form a swingable bogie type. The central roller 4 has a front roller 5 as shown in FIG.
If the structure is such that it can move in the upside down direction in conjunction with the above, when the crawler 3 is pushed downward, the front wheel 5a of the front roller 5 moves upward and the grounding length of the crawler 3 is increased. It is better to have a configuration that can be further shortened.

The buffer spring 15 is constructed so that its tension can be adjusted. Then, when the crawler 3 operates the power steering lever 16 on the cockpit to disengage one side clutch and continuously apply the side brake, the crawler 3 on the side having the braking force interlocked with it. The hydraulic device 13 on the side of the central wheel 4 can be extended.

In the combine shown in the embodiment, a thresher 17 is mounted on a chassis 9, and a cutting and conveying frame 18 is attached to a front part thereof so as to be vertically rotatable. Next, the configuration of FIGS. 4, 5, and 6 will be described. The central rolling wheel 4 rises when the frontmost rolling wheel 5a of the front rolling wheel 5 rises, and the rear rolling wheel 6 moves.
If the last rolling wheel 6a rises, it is lowered to return to the normal level.

Next, the operation will be described. First, when the work is started while starting the prime mover and driving the rotating parts of the machine body, the crawler 3 is driven by the drive sprocket 1 to propel the chassis 9. Then, the grain culm in the field,
It is mowed by a mowing device provided in the mowing and conveying frame 18 at the front part and is supplied to the threshing machine 17 by the conveying device to be subjected to the threshing action.

In this way, the combine performs the cutting and threshing work. When the crawler 3 travels on an ordinary flat ground, the central wheels 4a, 4b, 4c are connected to the connecting body 1.
2. While being buffered by the buffer spring 15 via the swing arm 8, the front and rear wheels 5, 6 are pressed downward while maintaining the same level. Therefore, the crawler 3 has a long ground contact area and can be stably propelled.

Next, the crawler 3 conforms to the surface of the ridge so that the front rolling wheel 5 and the rear rolling wheel 6 are constructed in a bogie manner when riding over a small and high portion such as a ridge. You can drive to. Next, the case of turning will be described. One side clutch is disengaged by the operation of the power steering lever 18 and the operation is further continued to apply a side brake to apply a braking action to the crawler 3.

Then, in the crawler 3, the switching valve 14a of the hydraulic device 13 on the braking side is switched to the oil feeding side so that the cylinder extends. Along with this, in the crawler 3, the rolling wheels 4a, 4b, 4c are pushed downward from the front and rear rolling wheels 5, 6 via the swinging arm 8 and the connecting body 12, and the ground contact portion has the central rolling wheel 4 thereof. Only the part of.

Therefore, on the braking side, the crawler 3 can turn the chassis 9 without damaging the soil and destroying the surface of the field, and with a low consumed horsepower. Then, the hydraulic device 13 and the buffer spring 15 are
As in the embodiment shown in FIG. 2, since it is constructed so as to be positioned within the width of the crawler 3, it is characterized in that splashing mud is less involved and corrosion and the like can be reduced.

[0017]

As described above, the black of the present invention is used.
The roller is wound around the drive sprocket on one side and the tension roller on the other side, and a plurality of central rollers which guide the lower part of the middle part of the crawler are vertically moved and freely adjusted. A pair of front and rear wheels provided on the front side and the rear side of the central roller are tensioned to form a swingable bogie type with the intermediate portion of the mounting arm as a fulcrum. Because it is a thing, traveling on rough roads, ridge running, turning traveling etc. safely and reliably,
Moreover, it is a product that has a unique effect that it can be smoothly performed.

[Brief description of drawings]

FIG. 1 is a side view of a main part according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part in FIG. 1, which is an embodiment of the present invention.

FIG. 3 is a side view showing the operation of another embodiment of the present invention.

FIG. 4 is a block circuit diagram showing an embodiment of the present invention.

FIG. 5 is a hydraulic circuit diagram according to the embodiment of the present invention.

FIG. 6 is a side view showing the operation of another embodiment of the present invention.

FIG. 7 is a side view of the combine according to the embodiment of the present invention.

[Explanation of symbols]

1 Drive sprocket 2 Tension roller 3
Crawler 4 Central wheel 5 Front wheel 6
Rear wheel 7 Mounting arm

Claims (1)

[Claims] 1. A plurality of central rollers 4 which are provided around one drive sprocket 1 and the other tension roller 2 around which a crawler 3 is wound, and which guides a lower part of an intermediate portion of the crawler 3. Is provided by freely adjusting the vertical movement and tensioned downward, and a pair of front and rear rolling wheels 5 and 6 respectively provided on the front side and the rear side of the central rolling wheel 4 are provided in the middle of the mounting arm 7. Crawler type traveling device constituted by a bogie type with free swinging with a portion as a fulcrum a