JPS6245982Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a crawler traveling device mounted on a combine harvester or the like, and more particularly to its wheel structure.

Conventionally, as shown in FIG. 7, the track structure of the traveling device 11' is such that track wheels 16' of the same diameter are arranged opposite to each other on both left and right sides of a track frame 12', and the track wheels 16' are arranged opposite to each other. Since they are arranged at a predetermined interval in the longitudinal direction of the track frame 12', when the crawler 25 moves, the rolling wheels 16' vibrate up and down depending on the presence or absence of the lugs 27 of the crawler 25, causing the crawler to come off. At the same time, the running vibration balance deteriorated, causing discomfort to the operator. Further, in order to support the upper surface of the crawler, an upper roller 17' is provided approximately in the middle of the track frame 12'.
Although the crawler 25 is made to move smoothly, the upper roller 17' is inevitably located near the adjustment bolt 13, making it difficult to adjust the adjustment bolt 13. In addition, because the diameter of the wheel 16' is small, straw, mud, etc. tend to accumulate on the track frame from the inside of the aircraft, which corrodes the bolts that secure the wheel, making it difficult to remove the wheel. Ta.

Therefore, in the present invention, small roller wheels are arranged on one side of the frame, and large roller wheels with a large diameter that can come into contact with the upper and lower surfaces of the crawler are arranged on the other side, thereby solving the above-mentioned drawbacks. The purpose of this invention is to provide a traveling device.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in Fig. 1, the fuselage frame 1 includes:
The upper ends of the front column 2 and the rear column 3 are fixed at a predetermined distance in the front and rear, the front connecting frame 5 is fixed to the lower end of the front column 2, and the rear column 3 is fixed to the lower end of the rear column 3. A connecting frame 6 is fixed. Further, as shown in FIG. 2, a transmission 9 is attached to the front connection frame 5 via a fixing plate 7, and a drive shaft 9a extending left and right of the transmission 9 has drive shafts at both ends. A wheel 10 is integrally attached. Further, traveling devices 11 are arranged on both left and right sides of the fuselage frame 1, and track frames 12 of the traveling devices 11 are fixed to both left and right ends of the front and rear connecting frames 5 and 6. An idler wheel 15 is attached to the rear part of the track frame 12 via an adjustment bolt 13, and a small roller wheel 16 and a large roller wheel 17 are arranged on both left and right sides of the track frame 12. That is, the orbital frame 12
Small roller wheels 1 are installed on the outer surface of the aircraft frame 1.
6 are arranged at a predetermined interval, and on the inner surface, except for the small roller wheel 16 that is closest to the idler wheel 15 among the outer small roller wheels 16, Small roller wheels 16 and large roller wheels 17 are alternately arranged corresponding to each of the small roller wheels 16. As shown in FIG. 3, the frame 1
A large roller axle 19 and a small roller axle 20 are respectively fixed to the upper and lower sides of the roller 2, and a large roller axle 17 is rotatable via a bearing on the large roller axle 19 so as to be able to contact the upper and lower surfaces 25a and 25b of the crawler. A small roller wheel 16 is rotatably supported on the small roller shaft 20 via a bearing so that it can contact only the lower surface 25b of the crawler. Furthermore, small wheel 1
6 are disposed facing each other, as shown in FIG. 16 is rotatably supported via bearings. A rubber crawler 25 is wound around the drive wheel 10, idler wheel 15, small roller wheel 16, and large roller wheel 17. As shown in FIGS. 5 and 6, the rubber crawler 25 has an endless belt-shaped main body 26, and lugs 27 integrally protruding from the outside of the main body 26 are formed at predetermined intervals. has been done. Furthermore, drive holes 29 are bored in the approximate center of the main body 26 in the widthwise direction, and the drive holes 29 in which the teeth 10a of the drive wheels 10 can engage are formed at the same intervals as the pitches between the teeth of the drive wheels 10. A connecting portion 30 is formed by integrally connecting the main body 26 and the lug 27 to cover the drive hole 29 at a position above the drive hole 29 where the apex of the tooth 10a does not touch even when the tooth 10a is engaged with the hole 29. ing.

Since the present embodiment has the above-described configuration, when the drive wheel 10 is rotated by the power of the working machine equipped with the traveling device 11, the drive wheel 10 and the idler wheel 1 are rotated.
5. The crawler 25 wound around the small roller wheels 16..., the large roller wheels 17... moves, and the traveling device 11 travels. During normal running of the traveling device 11, the contact area of the large roller 17 with respect to the crawler 25 is larger than that of the small roller 1.
Since the contact area is larger than that of 6, the large wheel 17 falls only slightly between the lugs 27, reducing running vibration and running smoothly. In addition, when traveling in wet fields, the heavy large rolling wheels 17 are arranged on the machine frame 1 side, so the working machine runs stably. rubber crawler 25.
Since the drive hole 29 is covered with the connecting portion 30, the vehicle can run without mud or the like entering through the drive hole 29. Even if the rubber crawler 25 becomes loose, there is sufficient clearance on the outer side of the traveling device around the adjustment bolt 13, so that the adjustment bolt 13 can be loosened immediately.
can be adjusted to return the rubber crawler 25 to its original tensioned state.

As explained above, according to the present invention, the small roller wheels 16 are arranged on one side of the frame 12, and the large roller wheels 17 that can come into contact with the upper and lower surfaces 25a and 25b of the crawler are arranged on the other side. , when traveling, the large roller 17 is on the lug 27 of the crawler 25 and on the lug 2.
Even if it passes between 7 and 27, there will be no large vibration,
Running vibration can be reduced. By reducing the running vibration, it is possible to prevent the crawler 25 from coming off and to reduce the discomfort given to the operator. In addition, the upper surface 2 of the crawler 25
5a is supported by the large roller 17, the crawler 25
It eliminates vibrations in the upper part of the rubber crawler, restricts the movement of the crawler 25 in the width direction, and makes it easier for the teeth 10a of the drive wheel 10 to engage with the drive hole 29 of the rubber crawler 25.
Furthermore, the adjustment bolt 13 of the idler wheel 15 can be easily adjusted. Furthermore, the presence of the large roller wheels 17 extending over the upper and lower surfaces of the crawler can prevent straw, mud, etc. from entering the interior of the fuselage frame 12, suppressing corrosion of the fuselage frame 12 and bolts around it, The life of the traveling device 11 can be extended.

[Brief explanation of the drawing]

FIG. 1 is a side view of a traveling device to which the present invention is applied, FIG. 2 is a partially sectional plan view thereof, FIG. 3 is a front sectional view taken along the - line in FIG. 1, and FIG. 4 is a front sectional view taken along the - line in Fig. 1, Fig. 5 is an enlarged plan view of the main part of the crawler, and Fig. 6 is a front sectional view taken along the - line in Fig. 1. 7 are side views of a conventional traveling device.

Claims (1)

[Scope of utility model registration request] In the traveling device 11 in which a crawler 25 is wound around the driving wheels 10, the idler wheels 15, and the wheels arranged on both left and right sides of the frame 12, among the wheels,
The small wheel 1 is located on one side of the frame 12.
6, and those located on the other side are large rolling wheels 17 with a large diameter that can come into contact with the upper and lower surfaces of the crawler.