JPH10290621A - Traveling unit for working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a verity of parts on the body frame or movable track frame from being damaged by interference with the crawlers by maintaining the upper side of the crawlers in the proper attitude for a relatively long range. SOLUTION: A couple of longitudinal swing arms 5a, 5b which are held to the body frame swingable vertically are set at their each rear edge to a couple of movable single track frame 6 on both of the right and left crawlers so that, the swing arm are made vertically swingable by the hydraulic cylinder 16. In the meantime the body frame 2 and the movable track frame 6 are arranged in parent with other and the crawler is fitted at its top end to the driving wheels 4 and at its rear end to the tension wheel 8 set at the rear edge of the movable track frame 6. In addition, the upper part of the crawler is supported by the upper wheel 19 between the swing arms near the rotatably supporting part of the rear side arm at and the lower part is supported by the ground wheel 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling device provided on a working vehicle such as a combine.

[0002]

2. Description of the Related Art In a working vehicle such as a combine or the like, a pair of left and right endless track belt-type traveling vehicles are used to maintain a working device such as a threshing device and a vehicle body equipped with a cockpit in a left-right horizontal position regardless of unevenness of the ground. 2. Description of the Related Art There is known a technique in which a track frame in an apparatus can be vertically moved up and down independently of a vehicle body frame.

In such a configuration, the tip of a swing arm pivotally attached to the vehicle body frame side so as to be vertically rotatable is pivotally attached to the track frame, and the swing arm is hydraulically driven. The track frame is raised and lowered by rotating vertically by a cylinder. Such a configuration is disclosed in, for example, Japanese Patent Application Laid-Open No. 58-2246.
No. 09, JP-A-61-183785, JP-A-63-96981, and JP-A-63-63346.

For example, in Japanese Utility Model Laid-Open Publication No. 61-183785, a pair of front and rear track frames which are connected to each other so as to be extendable and contractible in the front-rear direction are arranged below a vehicle body frame. , A sprocket provided at the rear end of the rear track frame, a wheel provided at each of the front and rear track frames, and a body frame.
The endless track belt is wound around an upper idler provided at a position protruding downward at a center position in the front-rear direction of the robot. In addition, the front track frame is connected by a straight arm extending downward from the position protruding downward at the center position in the front-rear direction of the vehicle body frame, and the rear track frame is connected. The frame is connected to the vehicle frame by a linear arm extending rearward and downward from a position protruding downward at a center position in the front-rear direction. Further, each arm is extended up and down by two hydraulic drive cylinders extending from the front and rear end portions of the vehicle body in an inverted C-shape when viewed from the side, and pivotally attached to an intermediate portion of each arm. A configuration is described in which the right and left crawler belt type traveling devices are vertically moved up and down independently.

[0005]

According to the above configuration,
When the endless track type traveling device is raised with respect to the vehicle body frame, the horizontal portion protruding downward at the center position in the front-rear direction of the vehicle body frame and the upper idler come very close to the ground, There is a disadvantage that the mud lifted by the endless track easily accumulates in the horizontal portion and the upper idler. In the left and right crawler belt type traveling apparatus disclosed in Japanese Utility Model Application Laid-Open No. 63-63346, the track frame disposed below the front-rear body frame constituting the vehicle body includes: , Two front and rear parts, each of which is provided with a pair of front and rear swing arms which are pivotally supported on the front and rear body frames so as to be vertically rotatable. Therefore, each track frame is pivotally supported at one point by the tip of each swing arm, and the front and rear track frames do not always move up and down in a parallel posture.

In addition, since the drive wheel and the tensioning wheel are fixed to the front and rear ends of the vehicle body frame, the vertical movement of the front and rear track frames cannot be increased.
Because the vertical distance between the track frame and the front and rear track frames is also narrow,
During this time, there was a problem that the mud was easily clogged and that cleaning and inspection and maintenance could not be easily performed. Further, there is also a problem that mud is easily clogged between the front and rear track frames.

In the configuration disclosed in Japanese Utility Model Laid-Open Publication No. 63-96981, a pair of front and rear swinging members are provided so that the vehicle body frame and the truck frame can move up and down while maintaining a parallel posture in the front and rear direction. It is pivotally connected so as to be able to ascend and descend through an arm. However, although the driving wheel is provided at the front end of the vehicle body frame and the tensioning wheel is provided at the rear end of the track frame, the upper wheel for supporting the upper side of the endless track belt is provided. Since it is not provided, the upper side of the endless track belt is not supported between the driving wheel and the tensioning wheel as the track frame moves up and down, and is inclined in the front-rear direction when viewed from the side. There is a disadvantage that the rotational drive of the long upper side is not stable. In addition, since the rotational drive of the endless track zone is not stable, the vertical movement between the vehicle body frame and the truck frame cannot be increased or decreased, so that the track frame or the vehicle body frame cannot be increased. There was a problem that it was difficult to remove the mud clogged in between.

[0008]

The present invention employs the following technical means in order to solve the above-mentioned problems. That is, in a working vehicle in which a pair of left and right endless track belt type traveling devices 1 can be vertically lifted independently of each other below the vehicle body frame 2, the front and rear pivotally supported to the vehicle body frame 2 side vertically. The rear end portions of the pair of swing arms 5b and 5a are respectively pivotally mounted on the left and right single movable track frames 6 in the left and right endless track type traveling device 1, respectively, and are hydraulically driven cylinders. By driving the pair of swing arms 5b and 5a up and down by driving the vehicle frame 16, the vehicle body frame 2 and the movable track frame 6 are substantially parallel to each other in side view. The driving wheel 4 is disposed in front of the front swing arm 5b, and the driving wheel 4 is provided with the endless track belt 9 in the left and right endless track type traveling device 1. Wrap around the front end side and the rear end of the left and right movable track frame 6 The end of the endless track belt 9 is wrapped around the attached tensioning wheel 8, and the upper side of the endless track band 9 is further moved between the pair of front and rear swing arms 5b and 5a and on the rear side. Of the endless track belt 9 is supported by an upper rolling wheel 19 provided from the vehicle body frame 2 side near the pivot portion of the swing arm 5a, and a plurality of grounding wheels 7 arranged on the movable track frame 6. A traveling device for a working vehicle characterized by supporting a lower side portion.

As described above, the rear end portions of the pair of front and rear swing arms 5b and 5a pivotably supported on the vehicle body frame 2 side up and down are connected to the right and left endless track belt type traveling devices. 1 is pivotally attached to each of the left and right single movable track frames 6;
The vehicle body frame 2 and the movable track frame 6 are formed so as to be substantially parallel to each other in a side view, and the front and rear swing arms 5b and 5a extend rearward, respectively. Therefore, by driving the hydraulic drive cylinder 16, the movable track frame 6 moves up and down in a substantially parallel posture with respect to the vehicle body frame 2.

Further, the driving wheel 4 is connected to the front swinging arm.
The front end side of the endless track band 9 of the left and right endless track type traveling device 1 is wound around the driving wheel 4 and is mounted on the rear end of the left and right movable track frame 6. The end of the endless track belt 9 is wrapped around the attached tensioning wheel 8, and the upper side of the endless track band 9 is further moved between the pair of front and rear swing arms 5b and 5a and on the rear side. Is supported by an upper rolling wheel 19 provided from the vehicle body frame 2 side near the pivotal portion of the swing arm 5a, so that even if the endless track type traveling device 1 is raised and lowered, the upper side of the endless track band 9 Is only a change in the rearward and downward inclination angle between the upper wheel 19 and the tensioning wheel 8 behind the upper wheel 19, and a relatively long distance between the driving wheel 4 and the upper wheel 19 in the front-rear direction. , The attitude of the upper side of the endless track zone 9 does not change vertically. As a result, even if the lower side of the endless track zone 9 is displaced following the unevenness of the ground, the upper side of the endless track zone 9 is maintained in an appropriate posture by the driving wheel 4 and the upper rolling wheel 19, and Even if various parts are provided on the vehicle body frame 2 and the movable track frame 6 between the wheel body 4 and the upper rolling wheel 19, they do not easily interfere with the endless track belt 9 and damage due to these interferences is prevented. Is done.

When the endless track type traveling device 1 is largely lowered with respect to the vehicle body frame 2, when viewed from the side,
A large gap is formed between the single movable truck frame 6 and the vehicle body frame 2, and the lower surface of the vehicle body frame 2 and the upper surface of the movable truck frame 6 are mutually seen in side view. The upper rolling wheel 1 is formed so as to be in a substantially parallel posture.
Reference numeral 9 is provided from the vehicle body frame 2 side near the pivot portion of the rear swing arm 5a. For this reason, a large gap is formed between the movable track frame 6 and the vehicle body frame 2 over a relatively long distance in the front-rear direction, so that cleaning and maintenance and inspection of mud can be easily performed from this gap.

[0012]

As described above, according to the present invention, there is provided a working vehicle in which a pair of right and left endless track type traveling devices 1 are provided below a vehicle body frame 2 so as to be able to independently ascend and descend right and left.
The front ends of a pair of front and rear swing arms 5b and 5a pivotally supported on the vehicle body frame 2 side up and down are respectively connected to the left and right single tracks in the left and right endless track type traveling device 1. The pair of front and rear swing arms 5b and 5a are pivotally attached to the movable track frame 6 and driven up and down by driving a hydraulic drive cylinder 16, while the vehicle body frame 2 and The movable track frame 6 is formed so as to be substantially parallel to each other in a side view, and the driving wheel 4 is disposed forward of the front swing arm 5b. Endless track zone 9 in the left and right endless track type traveling device 1
Of the endless track belt 9 around the tensioning ring 8 attached to the rear ends of the left and right movable track frames 6, and further, the upper side of the track belt 9. Between the pair of front and rear swing arms 5b and 5a and in the vicinity of the pivotal portion of the rear swing arm 5a by an upper rolling wheel 19 provided from the vehicle body frame 2 side, and is movable. Since the lower side of the track belt 9 is supported by a plurality of grounding wheels 7 disposed on the track frame 6, the lower side of the track belt 9 is uneven on the ground. , The upper side of the endless track belt 9 can be maintained in an appropriate posture over a relatively long distance by the driving wheel 4 and the upper rolling wheel 19, and the driving wheel 4 and the upper rolling wheel can be maintained. Vehicle frame 2 and movable truck frame 6
Even if various parts are provided, it is difficult to interfere with the endless track zone 9, and damage due to these interferences can be prevented.

When the endless track type traveling device 1 is largely lowered with respect to the vehicle body frame 2, when viewed from the side,
A large gap can be formed between the movable track frame 6 and the vehicle body frame 2, and a large gap can be formed between the movable track frame 6 and the vehicle body frame 2 over a relatively long distance in the front-rear direction. A large gap can be formed, and cleaning and maintenance inspection of mud can be easily performed from this gap.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. A pair of left and right crawler traveling units (crawler belt traveling units) provided at the lower part of the combine 1.1
Of these, since both the left and right have the same structure, only the crawler traveling device 1 on one side will be described.

A crawler driving wheel (driving wheel) 4 supported on a body frame 2 of the machine body via a transmission case 3 so as to be drivable. A movable link mechanism 5 connected to and supported by the body frame 2. An endless track band 9 is wound around a plurality of grounding wheels 7 and a crawler tensioning wheel (tensing wheel) 8 that are pivotally supported by a track frame 6. The grounding ring 7 is provided so as to contact and hold the grounding side lower side of the endless track belt 9 from above. The movable track frame 6 supports a large-diameter guide wheel 10 which is guided and rotated in contact with the movable track frame 6 so as to be vertically swingable. That is, the large-diameter guide wheel 10 is vertically swingable about the horizontal axis 12 with respect to the movable track frame 6 via the support arm 11, and is urged downward by the spring 13.

The swing link mechanism 5 has a pair of front and rear swing links (swing arms) 5a and 5 having one end connected to the movable track frame 6 and the other end connected to the vehicle body frame 2.
b and swing arms 14 for operating the swing links 5a and 5b. The free ends of the swing arms 14 are connected to each other by a rod 15, and the piston rod 16a of the hydraulic drive cylinder 16 connected to the body frame 2 is connected to the swing arm 14 on one side. Accordingly, the pair of front and rear swing links 5a and 5b is operated to swing by the hydraulic drive cylinder 16 via the swing arms 14 and 14, and the movable track frame 6 is moved up and down with respect to the body frame 2 with the swing. It is configured to be.

The large-diameter guide wheel 10 moves up and down together with the movable track frame 6, but always contacts the lower side and the upper side of the endless track zone even when the vehicle height is lowered or when the vehicle height is raised. , In a state where tension is maintained. And the fourth
As shown in FIG. 5 and FIG. And is urged to the lower side around the axis of the horizontal axis via a shaft, and a fixed-diameter fixed body 19 having a small diameter is provided on the rear upper portion on the vehicle body frame 2 side.
As shown in the figure, when the vehicle height is lowered, the movable wheel 17 is moved to the endless track zone 9.
The fixed wheel body 19 is configured to stretch the crawler when the vehicle height is raised as shown in FIG.

[Brief description of the drawings]

FIG. 1 is a side view of a traveling device.

FIG. 2 is a side view of the traveling device.

FIG. 3 is a plan view of a main part.

FIG. 4 is a side view of the traveling device.

FIG. 5 is a side view of the traveling device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Endless track belt type traveling device 2 Body frame 4 Driving wheel 5a Swing arm 5b Swing arm 6 Movable track frame 7 Grounding wheel 8 Tension wheel 9 Endless track belt 16 Hydraulic drive cylinder 19 Upper wheel

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Michio Ishikawa 1st Hachikura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. Within the Technical Department (72) Inventor Atsushi Sogabe 1 Yachikura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] 1. A working vehicle in which a pair of left and right endless track type traveling devices 1 can be independently raised and lowered independently of each other below a vehicle body frame 2. The rear end portions of the pair of front and rear swing arms 5b and 5a are pivotally attached to the left and right single movable track frames 6 in the left and right endless track type traveling device 1, respectively, and hydraulic pressure is applied. The pair of front and rear swing arms is driven by driving the drive cylinder 16.
The vehicle frame 2 and the movable track frame 6 are formed so as to be substantially parallel to each other in a side view, and the driving wheel body 4 is formed. It is arranged forward of the front swing arm 5b,
The front end side of the endless track belt 9 in the left and right endless track belt type traveling device 1 is wound around the driving wheel body 4, and the tensioning wheel body 8 attached to the rear end of the left and right movable track frame 6. The end of the endless track belt 9 is wrapped around the rear end side, and the upper side of the endless track belt 9 is further connected to the pair of front and rear swing arms 5b and 5a.
And a plurality of grounding wheels 7 arranged on the movable track frame 6 and supported by upper rolling wheels 19 provided from the body frame 2 side in the vicinity of the pivotal portion of the swing arm 5a on the rear side. A traveling device for a working vehicle, wherein a lower side portion of the endless track belt 9 is supported by the traveling vehicle.