JPH04215579A - Crawler running device - Google Patents

Abstract

PURPOSE:To simplify the structure of a system tilt-adjusting a truck frame relatively vertically and longitudinally against a body frame. CONSTITUTION:A swing arm 13 vertically swung by a hydraulic cylinder 16 is fitted to a body frame 4, and a vertically rotatable truck frame 5 is fitted to the free end of the swing arm 13 so that the rotating attitude of the truck frame 5 against the swing arm 13 can be adjusted by a hydraulic cylinder 15. The truck frame 5 is liftably connected to the body frame 4 via a parallel quadruple link, and the number of parts is reduced and the structure is simplified as compared with a system longitudinally tilting the whole lifting system.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler traveling device used primarily for agricultural machinery such as combines.

0002

BACKGROUND OF THE INVENTION The crawler traveling device which is the object of the present invention has been previously disclosed in Japanese Patent Application No. 1-216643 by the present applicant.
There is something that I have proposed as a number. This crawler traveling device includes a track frame having ground contact wheels and crawler tension wheels, a body frame above the track frame, a parallel quadruple link mechanism, and a rear part of the parallel quadruple link mechanism that connects the truck frame and the body frame. It has a structure in which a swingable and telescopic coupling mechanism and a hydraulic cylinder for swinging and extending and contracting the coupling mechanism are attached to the fuselage side. By driving the parallel four-link mechanism, crawler travel is controlled by the aircraft through the track frame. You can adjust the elevation relative to the
By swinging and expanding and contracting the coupling mechanism via the hydraulic cylinder, the crawler traveling device can be adjusted in inclination relative to the aircraft body centering on the crawler drive wheel located in front of the truck frame, and the crawler travel device can be tilted relative to the aircraft body. It is equipped with a function that allows correction of inclination and longitudinal inclination.

0003

[Problems to be Solved by the Invention] However, the conventional configuration described above has a problem in that it has a relatively complicated structure that is equipped with a parallel quadruple link mechanism, and on top of which a connecting mechanism and a hydraulic cylinder are newly provided. was there. The present invention has been made in view of the above-mentioned circumstances, and provides a crawler traveling device with a relatively simple structure that allows for vertical adjustment and inclination adjustment of the body of the crawler traveling device.

0004

[Means for Solving the Problems] A characteristic configuration of the present invention is that a track frame is pivotally connected to the free end of a swing arm that is driven to swing up and down by a hydraulic cylinder, and is movable up and down. A hydraulic device is provided between the truck frame and the truck frame to set the rotational attitude of the truck frame with respect to the swing arm.

[0005]

[Operation] By swinging the track frame up and down with respect to the machine body through the free end of the swing arm by the hydraulic cylinder, the crawler traveling device including the track frame can be adjusted up and down relative to the machine body. By driving the hydraulic system, the attitude of the track frame relative to the swing arm can be changed to adjust the inclination relative to the aircraft body.

[0006]

As a result, it has become possible to correct the horizontal and vertical inclinations of the aircraft body using a relatively simple structure with a small number of parts.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 shows an overall side view of a combine harvester equipped with a crawler traveling device 1 according to the present invention. This combine has a threshing device 2 mounted on a machine body equipped with crawler traveling devices 1 on the left and right sides, and a reaping pre-processing section 3 connected to the front part of the machine so as to be able to move up and down. is configured as follows. Since the left and right crawler traveling devices 1 have the same specifications, the detailed structure of the left one will be explained below with reference to FIG. 1.

In FIG. 1, reference numeral 4 indicates a fuselage frame;
is a truck frame, 6 is a hydraulically driven drive sprocket installed at the front end of the truck frame 5, 7 is a plurality of rolling wheels pivotally supported on the truck frame 5, and 8 is connected to the truck frame 5 via a swing arm 9. Large-diameter movable wheels mounted to be able to move up and down, 10 are tension wheels provided at the rear end of the track frame 5, and 11 are rubber crawler belts wound and tensioned around these wheel groups.

The track frame 5 is connected to the free end of a swing arm 13, which is connected to the body frame 4 so as to be swingable up and down about a fulcrum shaft 12, and to be swingable up and down about a fulcrum shaft 14. A hydraulic cylinder 15 as a hydraulic device for setting the attitude of the truck frame is installed between a portion of the truck frame 5 that is forwardly separated from the fulcrum shaft 14 and the fulcrum shaft 12 at the base end of the swing arm 13. Further, from the base end of the swing arm 13, there is an operating arm 13a.
is integrally extended upward, and a hydraulic cylinder 16 for driving up and down is installed between this operating arm 13a and the body frame 4.

The crawler traveling device 1 of the present invention is constructed as described above, and the swing arm 13 is vertically swung by the hydraulic cylinder 16, and the hydraulic cylinder 15 is extended and contracted to move the track frame 5 into the body frame 4. The track frame 5 can be raised and lowered relative to the body frame 4, and the longitudinal inclination angle of the track frame 5 with respect to the body frame 4 can be arbitrarily changed and adjusted by adjusting the degree of expansion and contraction of the hydraulic cylinder 15.

Another embodiment of the invention is shown in FIG. In this case, a gear 17 is provided at the free end of the swing arm 13.
In addition, the track frame 5 is equipped with a rack rod 18 that is driven back and forth by a hydraulic cylinder 15, and by engaging the rack rod 18 and the gear 17, rotation of the truck frame 5 around the fulcrum shaft 14 is achieved. Posture is now set.

[0012] Although reference numerals are written in the claims for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

[Figure 1] Side view of crawler traveling device

[Figure 2] Overall side view of combine harvester

[Fig. 3] Side view of main parts showing another embodiment of the crawler traveling device

[Explanation of symbols]

5 Track frame 13 Swing arm 15 Hydraulic system 16 Hydraulic cylinder

Claims (1)

[Claims] 1. A track frame (5) is pivotally connected to the free end of a swing arm (13) that is driven to swing up and down by a hydraulic cylinder (16), and the swing arm (13) is movable up and down. and said track frame (5)
A hydraulic device (15) that sets the rotational posture of the truck frame (5) with respect to the swing arm (13)
) is installed on the crawler traveling device.