JPS6024690Y2 - Support structure for idle wheels in the running section of mobile agricultural machinery - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a support structure for an idler wheel in a running section of a mobile agricultural machine.

In other words, a mobile agricultural machine is constructed by inserting the support rod of the idler wheel around which the crawler passes through a fixed guide pipe, supporting the end side of the support rod with an adjustable tension bolt, and supporting the crawler under tension by the idler wheel. In the traveling section, under normal conditions, tension bolts can be used to adjust the tension of the idler wheels and provide good tension support so as not to disturb the tension, but the tension bolts break due to abnormal tension in the crawler and must be replaced. Even if the idler wheel does not come off the crawler, the tension bolt can be easily replaced by supporting the idler wheel so that it does not come off the crawler.Furthermore, when the crawler is removed or rotated, the idler wheel can be moved significantly. To provide a crawler that allows the crawler to be easily attached and detached.

Next, the embodiment shown in the drawings will be described.

FIG. 1 is a side view schematically showing a combine harvester, in which a combine main body 8 for reaping, threshing, etc. is mounted on a machine stand 7 supported above crawlers 1, 1 on both sides of the lower part.

The crawlers 1 on both sides are attached to the front driving wheel 9, the rear idler wheel 2, and the ground-side rolling wheels 10, and a horizontal support frame 12 is attached to the rear upper part of the truck frame 11 that supports each rolling wheel 10. Both guide pipes 4 that are parallel to each other in the front and rear directions intersect,
4 is fixedly installed, and both support rods 3.3 which are slidably inserted into both guide pipes 4, 4 extend rearward, and both support rods 3.
The rear end portions 3a, 3 of 3 are shaped slightly larger so as to extend downward, and the idler wheel 3 is freely rotatable on a shaft portion 13 mounted across the rear end portions 3a, 3a. Install and configure.

Further, a support member 14 is fixed across the ends of both support rods 3, 3 extending forward of both guide pipes 4, 4. A tension bolt 5 is attached to a support piece 15 fixed above the support frame 12. The head 5a of the bolt is inserted to the rear of the support piece 15, the waist tension bolt 5 is inserted through the support metal 14, and a double nut 16 is screwed into the bolt portion in front of the support metal 14.

Reference numeral 6 denotes stop fittings, both of which have a semicircular cross section, 6a, 6a.
The rear end surface 4a of the guide pipe 4 and the support rod 3
Both metal fittings 6a are attached to the portion of the support rod 3 between the rear end portions 3a.
, 6a are fitted together and sandwiched between bolts and nuts 17. However, when the bracket 6 is moved rearward while the idler wheel 2 is supporting the crawler 1 under tension, the front end surface 6 of the bracket 6
a and the rear end surface 4a of the guide pipe 4.
When the tension bolt 5 is cut and the idler wheel 2 moves forward, the rear end surface 4a of the guide pipe 4 and the front end surface 6b of the metal fitting 6 collide with each other. 1 remains engaged with the idler wheel 2 without derailing.

In a normal state, as shown in FIGS. 2 and 3, the idler wheel 2 can be supported under tension by the tension bolt 5, and the tension can be adjusted by screwing the double nut 16. 6 is in a fitted state with some play in the axial direction.

If the crawler 1 becomes abnormally tensioned, the tension bolt 5 breaks, but in that case, as shown in FIG. 5, the idler wheel 2 is pushed by the crawler 1 and moves forward, but the metal fitting 6 The guide pipe 4 collides with the idler wheel 2.
In this state, the crawler 1 loosens but does not separate from the idler wheel 2. In this state, the tension bolt 5 can be replaced and the tension support state can be restored again.

As described above, in the present invention, the support rod 3 of the idler wheel 2 around which the crawler 1 is hung is inserted through the fixed guide pipe 4, and the end side of the support rod 3 is supported by the adjustable tension bolt 5.
In the running section of a mobile agricultural machine in which a crawler 1 is tension-supported by an idler wheel 2, a part of the support rod 3 between the side end of the idler wheel 2 and the end face of the guide pipe 4 is provided when the idler wheel 2 is supported under tension. Since the structure is such that the short stop fitting 6 that is separated from the end face of the guide pipe 4 is detachably attached, the tension of the idler wheel 2 can be adjusted by the tension bolt 5 during normal operation so that the fitting 6 does not get in the way. Even if the tension bolt 5 breaks due to abnormal tension in the crawler 1 and needs to be replaced, the idler wheel 2 can be supported by a metal fitting 6 so that it does not separate from the crawler 1, and the crawler 1 can be The tension bolt 5 can be replaced without coming off the wheel 2, making the operation extremely easy.

Moreover, although it facilitates the replacement work of the tension bolt as mentioned above, the stop fitting is attached to the support rod 3.
Since it is designed to be detachably attached to the crawler 1, when removing or wrapping the crawler 1, the metal fittings can be removed and the idler wheels can be moved considerably without difficulty. can be handled.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a side view schematically showing a combine harvester, Fig. 2 is a side view of a part of the running section, Fig. 3 is a plan view of the main part, and Fig. 4 is a stopper. A cross-sectional view of the metal fitting, and FIG. 5 are operation explanatory views. 1...Crawler, 2...Idle wheel, 3.
...Support rod, 4...Guide pipe, 5.
...Tension bolt, 6... Stop fitting.

Claims (1)

[Scope of utility model registration request] The support rod 3 of the idler wheel 2 that wraps around the crawler 1 is inserted into a fixed guide pipe 4, and the end side of the support rod 3 is supported by an adjustable tension bolt 5, and the crawler 1 is supported under tension by the idler wheel 2. In the running section of a mobile agricultural machine configured as follows, a part of the support rod 3 between the side end of the idler wheel 2 and the end face of the guide pipe 4 is provided with a part that separates from the end face of the guide pipe 4 when the idler wheel 2 is supported under tension. Short stop fitting 6
A support structure for an idler wheel, characterized in that it is configured to be detachably attached.