JPH09315353A - Crawler travel device for working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate length adjustment of a connecting rod, piping work to an elevating cylinder, and the like and enlarge machine body lower part space between crawler travel devices so as to prevent straw chips and the like from sticking to a machine body by elevating link mechanism outside of a track frame from the top view. SOLUTION: Elevating link mechanism R is arranged outside of a machine body in relation to a longitudinal pair of brackets 7, 7. A connecting rod 13 is provided to adjust the levelness of the machine body. The machine body is lowered into a lowest position to measure the longitudinal height of a machine body frame 6, and in case of a front up state, the length of the connecting rod 13 is lengthened to make the machine body horizontal. Since the elevating link mechanism R is exposed on the outside of the machine body, length adjustment of the rod 13, piping to a hydraulic cylinder 14, and the like are facilitated. Machine body lower part space is enlarged, so that straw chips, mud, and the like flying being wound up by rubber crawlers 5, 5 hardly stick to the machine body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work vehicle such as a combine or a carrier, and more particularly to a crawler traveling device whose height is adjustable.

[0002]

2. Description of the Related Art Conventionally, as shown in Japanese Utility Model Laid-Open No. 2-6689, a height adjustable crawler traveling device in a combine has a plurality of rolling wheels and tensions mounted on a fixed frame fixed to a lower portion of a vehicle body frame. A track frame equipped with wheels, a front swing arm and a rear swing arm in a V shape in a side view, and a connecting rod with an adjustable length for connecting the upper part of the front swing arm and the upper part of the rear swing arm, Also, the crawler traveling device is supported via a lifting link mechanism composed of a hydraulic cylinder connected to the upper end of the rear swing arm, and the height of the crawler traveling device can be adjusted as the hydraulic cylinder expands and contracts.

[0003]

According to the above-mentioned conventional crawler traveling device, since the elevating link mechanism is arranged inside the track frame, the upper part of the front swing arm and the upper part of the rear swing arm are connected to each other. It is difficult to adjust the length of the connecting rod whose length can be adjusted and to perform piping work for the lifting cylinder.In addition, the fixed frame and the lifting link mechanism are located inside the track frame, so that the space under the fuselage between the crawler traveling devices is reduced. Straws and mud, which are narrowed and rolled up by the pair of left and right rubber crawlers, fly toward the inside of the machine, and are easily attached to the lifting link mechanism and fixed frame of the other crawler, thus frequently cleaning the crawler traveling device. There was a lot of work to do and there was room for improvement.

It is an object of the present invention to eliminate the above drawbacks by devising a track frame support structure.

[0005]

According to a first aspect of the present invention, a track frame having a plurality of rolling wheels and tension wheels is fixed to a fixed portion of a vehicle body frame and its height can be adjusted through an elevating link mechanism. In the crawler traveling device of the work vehicle connected to the above, the elevating link mechanism is arranged outside the track frame in plan view. [Operation] By arranging the lifting link mechanism on the outside of the track frame in plan view, a connecting rod and a lifting cylinder with adjustable length that connect the upper part of the front swing arm and the upper part of the rear swing arm to the outside of the machine body As a result, the adjustment of the length of the connecting rod and the piping work for the lifting cylinder become easier. In addition, the space below the fuselage between the crawler traveling devices expands, and it becomes difficult for dust such as straw dust and mud that are wound up by the left and right crawlers and fly toward the inside of the fuselage to adhere to the fuselage. In addition, since there is no other object such as the machine body fixing part that supports the track frame on the outer side of the lifting link mechanism, it is easy for the dust and dirt that fly to the outside of the machine body to escape to the outside, and the outside of the machine body Even if scraps of dust, dirt, or the like flying toward one side adhere to the lifting link mechanism, the lifting link mechanism is located outside the track frame, so that it is easy to remove. [Effect] As a result of the above configuration, it becomes easier to adjust the length of the connecting rod in the elevating link mechanism and to perform piping work for the elevating cylinder, and the space under the machine between the crawler traveling devices expands, and straw debris adheres to the machine. It becomes difficult to do so and frequent cleaning work can be avoided.

According to a second aspect of the present invention, the lifting and lowering link mechanism is rotatably mounted on a fixed portion of a vehicle body frame, and has a V-shaped front swing arm and a rear swing arm, and A connecting rod having an adjustable length for connecting an upper part of the front swing arm and an upper part of the rear swing arm, and an elevating cylinder connected to an upper end of the rear swing arm, wherein the elevating cylinder of the elevating link mechanism is a vehicle body frame. It is located at the same level as or above the body frame. [Operation] By disposing the elevating cylinder of the elevating link mechanism at the same level as the body frame or above the body frame, it becomes difficult for dust and dirt to adhere to the elevating cylinder. [Effect] As a result of the above configuration, it becomes even more difficult for dust and dirt to adhere to the lifting cylinder of the lifting link mechanism,
More cleaning work can be avoided.

According to a third aspect of the present invention, the crawler traveling device is a crawler traveling device for machine body rolling, which is capable of moving up and down independently of each other. [Operation] By operating only one of the lifting cylinders of the left and right crawler traveling devices, the rolling of the machine body is performed. [Effect] As a result of the above configuration, the crawler traveling device can be applied as a crawler traveling device that relatively raises the entire machine body and as a rolling crawler traveling device that corrects the lateral inclination of the machine body to a horizontal posture with respect to the ground.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to a combine crawler traveling device. FIG. 1 shows a combine crawler traveling device 1, which comprises a drive wheel 2, a plurality of ground contact wheels 3, a tension wheel 4,
A pair of left and right, which is composed of a rubber crawler 5 and has a plurality of rolling wheels 3 ... The movable track frames 8 are connected to each other via a lifting link mechanism R so that their heights can be adjusted. The drive wheels 2 of the crawler traveling device 1 are such that the axle case 9a of the mission case 9 is attached to the bracket 1 on the body frame 6 side.
It is fixedly supported on the vehicle body frame 6 by being fixed to 0.

The lifting link mechanism R includes a vehicle body frame 6
The front swing arm 11 and the rear swing arm 12 which are rotatably mounted on the pair of front and rear brackets 7 and 7, respectively, which are V-shaped in side view, and the upper and rear swing arms of the front swing arm 11. A turnbuckle type connecting rod 13 for connecting the upper part of the arm 12 with adjustable length,
And a hydraulic cylinder 14 connected to the upper end of the rear swing arm 12. The movable track frame 8 including the plurality of grounding wheels 3 and the tensioning wheel 4 is disposed on the inner side of the body with respect to the pair of front and rear brackets 7, 7 on the body frame 6 side. ,
The brackets 7 are arranged on the outer side of the body with respect to the pair of front and rear brackets 7. The connecting rod 13 adjusts the levelness of the machine body, and lowers the machine body to the lowermost position to measure the front and rear heights of the machine body frame. To shorten,
When the length of the connecting rod 13 is increased, the body becomes horizontal.

According to the above construction, the lifting link mechanism R is exposed to the outside of the machine body, which facilitates the adjustment of the length of the rod 13 and the piping for the hydraulic cylinder 14.
Further, the space below the machine body between the crawler traveling devices 1 and 1 is widened, and the scraps and mud that are rolled up by the rubber crawlers 5 and fly laterally are less likely to adhere to the machine body.

In the crawler traveling device, when the hydraulic cylinder is extended, the pair of front and rear swing arms are rotated in the same direction as the timepiece, the crawler traveling device is lowered with respect to the vehicle body frame, and the hydraulic cylinder is contracted. For example, the pair of front and rear swing arms rotate counterclockwise to raise the crawler traveling device with respect to the body frame. Therefore, if the hydraulic cylinders of the left and right crawler traveling devices are simultaneously operated, the entire machine body is moved up and down relatively, and if only one hydraulic cylinder is operated, the machine body is rolled.

[Other Embodiments] In the above embodiments, the combine crawler traveling device has been described, but a crawler traveling device for a carrier or a backhoe may be used. Further, the machine body fixing portion may be a long fixed frame extending in the machine body front-rear direction.

[Brief description of drawings]

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

FIG. 2 is a plan view of the same.

FIG. 3 is a longitudinal sectional front view of the same.

[Explanation of symbols]

 1 Crawler traveling device 3 Rolling wheel 4 Tension wheel 6 Body frame 7 Fixed part 8 Track frame 11 Front swing arm 12 Rear swing arm 13 Connecting rod 14 Lifting cylinder R Lifting link mechanism

Claims (3)

[Claims] 1. A crawler traveling device for a work vehicle, wherein a track frame having a plurality of rolling wheels and tension wheels is connected to a fixed portion of a vehicle body frame via a lifting link mechanism so as to be adjustable in height. A crawler traveling device for a work vehicle in which an elevating link mechanism is arranged outside a track frame in a plan view. 2. The elevation link mechanism is rotatably mounted on a fixed portion of a vehicle body frame, and has a front swing arm and a rear swing arm each having a V shape in a side view, and an upper portion and a rear portion of the front swing arm. It comprises a connecting rod whose length is adjustable to connect with the upper part of the swing arm, and an elevating cylinder connected to the upper end of the rear swing arm. The elevating cylinder of the elevating link mechanism is at the same level as the body frame or above the body frame. It is arranged in
The crawler traveling device for a work vehicle described in. 3. The crawler traveling device for a working vehicle according to claim 1, wherein the crawler traveling device is a crawler traveling device for body rolling that can be independently moved up and down.