JPH0349987Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The present invention is applicable to a crawler used in a combine harvester, for example, and is used for crawler-type running of agricultural machinery equipped with an equalizer roller that allows the crawler to follow the uneven surface of a field and come into contact with the ground. Regarding equipment.

``Prior Art'' Conventionally, as shown in Japanese Utility Model Application No. 50-95716, there has been a technique in which an equalizer roller is brought into contact with the inner circumferential surface of the lower part of a crawler.

"Problems to be Solved by the Invention" In the prior art, the equalizer roller is always in contact with the crawler surface, so even when traveling on flat ground where no equalizer action is required, the equalizer roller is likely to rotate and increase vibration and noise. At the same time, it is necessary to set a large load on the equalizer roller, which poses problems such as the difficulty of reducing vibration and noise during crawler drive and simplifying the equalizer roller structure.

``Means for Solving the Problems'' However, the present invention supports the left and right sides of the lower inner peripheral surface of the crawler sandwiching the crawler core metal with a plurality of sets of track crawlers, each pair of left and right.
In a crawler-type traveling device for agricultural machinery equipped with an equalizer roller that comes into contact with the inner peripheral surface of the lower part of the crawler,
A guide groove is formed on the inner circumferential surface of the crawler at approximately the center in the left and right width, and the equalizer roller is disposed opposite to the guide groove on the lower side of the crawler in a non-pressurized state. ” ``Function'' Therefore, since the equalizer roller is arranged by providing a guide groove in the crawler, when the equalizer action is not required, such as when driving on flat land, the equalizer roller is supported in a non-acting state with respect to the crawler, and the equalizer roller is In addition to easily reducing the vibration and noise generated, the equalizer roller is placed in the center of the crawler so that the crawler comes into pressure contact with the equalizer roller only when climbing over a convex surface such as a ridge, and the track roller supports both sides of the roller. Because of the arrangement, the load borne by the equalizer roller can be set smaller than that of the conventional one, and the equalizer roller structure can be easily simplified and downsized.

"Embodiment" An embodiment of the present invention will be described below in detail based on the drawings. Fig. 1 is a cross-sectional explanatory view of the main parts, Fig. 2 is a side view of the whole, and Fig. 3 is a plan view of the same. A threshing section equipped with a shape handling cylinder 5 and a sorting mechanism 6 and mounted on the machine 1; 7 a grain tank for storing grains from the threshing section 4 to be taken out via a lifting cylinder 8; 9 a grain tank of the threshing section 4; A reaping section 11 is installed at the front of the lower part so as to be movable up and down via a hydraulic cylinder 19.
A driver's cab 14 is provided with a driver's seat 12 and a driving operation section 13 and is fixedly installed in front of the grain tank 7;
1 is an engine room provided at the rear of the grain tank 7 and houses an engine 15; 16 is a grain discharge auger for taking out grains from the grain tank 7; 17 is provided on the left outer side of the threshing section 4; This is the second reduction cylinder that returns the second processed material to the sorting mechanism 6.

The reaping section 9 includes a grain header 18 that receives uncut grain culms, and a supply chamber 19 that is connected to the rear center of the header 18 and feeds the reaped grain culms to the threshing section 4. At the same time, the uncut grain culm raking reel 20, the reciprocating drive type cutting blade 21, and the grain culm raking drum 22 are connected to the grain header 18.
In preparation for this, a supply chain conveyor 23 is provided in which the cut grain culms to be taken into the header 18 are installed in the supply chamber 19.
It is configured so that the grains are sent to the threshing section 4 through the threshing section 4 for threshing processing.

As shown in FIG. 4, the traveling crawler 2 has front and rear ends connected to an idler wheel 24 and a drive sprocket 25.
The intermediate lower portions of these are supported by track rollers 26, which are a plurality of outer wheels, and each idler wheel 24, drive sprocket 25, and track rollers 26 are connected and supported by the track frame 3.

As shown in FIG. 5, an equalizer device 27 is installed approximately in the middle of the truck frame 3.
The equalizer device 27 includes a bearing member 28 fixed to the truck frame 3, and an equalizer roller connecting plate 31 rotatably supported by the member 28 via a bearing 29, a rotation fulcrum shaft 30, etc. A pair of front and rear equalizer rollers 34a, 34b are pivotally supported at both ends of the connecting plate 31 via a roller shaft 32, a bearing 33, etc., and stoppers 35, 35 for restricting the rotation of the connecting plate are fixed to the track frame 3. We are prepared. As shown in the imaginary line in FIG. 5, a core metal 36 embedded in the inner circumference of the crawler 2
For the track crawler 26 which supports the crawler 2 with double left and right sides and is formed to have a large diameter R,
The equalizer rollers 34a and 34b have a core metal 36.
It faces the guide groove 36b between the protrusions 36a, 36a, and is formed to have a small diameter r. In addition, when the crawler 2 is in contact with a smooth surface and is supported under pressure by each truck crawler 26..., under a stationary condition,
The equalizer rollers 34a, 34b and the core metal 36
A slight gap t is provided between the equalizer rollers 34a and 34b to avoid interference between the equalizer rollers 34a and 34b and the core metal 36 when running on flat ground, and this interference generates vibrations and shocks, which become a source of vibrations and shocks for the machine body. It is designed to prevent this from happening.

As is clear from the above, a plurality of sets of track crawlers 26, each pair being a left and right pair, are arranged on both the left and right sides of the inner peripheral surface of the lower part of the crawler 2, sandwiching the crawler core metal 36.
In a crawler-type traveling device for agricultural machinery equipped with equalizer rollers 34a and 34b that are supported by... and brought into contact with the inner circumferential surface of the lower part of the crawler 2, a guide groove 36b is provided approximately at the center of the left and right widths on the inner circumferential surface of the crawler 2.
, and the guide groove 36 on the lower side of the crawler 2
The equalizer roller 34a is in a non-pressure state on b.
34b are arranged facing each other.

By the way, the rotation fulcrum shaft 30 of the equalizer device 27 is disposed at a position forward of the machine body from the machine center of gravity line G, which is the machine center of gravity, and is located at a position forward of the machine body from the machine body center of gravity line G, which is the machine body center of gravity.
The roller shaft 32 of b is disposed at a position rearward from the line G, and when the machine is going over a convex surface such as a ridge, the front roller 34a is moved to the ground before the center of gravity of the machine passes over the convex surface, a so-called fulcrum point. The configuration is such that the aircraft can be moved quickly by being forced to the side.

The track frame 3 is made of a square pipe, and the lower surface of the rollers 34a and 34b is cut out to form a roller retraction groove A.
4a and 34b are configured to move in and out of the truck frame 3.

This embodiment is configured as described above, and is used when the center of gravity of the machine crosses over the fulcrum when the machine moves from a sloped ground to a horizontal ground during work, and the machine attitude suddenly changes from a backward tilted position to a horizontal position, or when the machine moves from a sloping ground to a horizontal ground, or when the machine attitude suddenly changes from a backward tilted position to a horizontal position, or When the aircraft attitude suddenly changes from a backward leaning attitude to a forward leaning attitude when the aircraft goes over a convex surface, the roller 3 on the front side of the aircraft body changes before this change.
4a is forcibly pressed downward and the crawler 2 of this roller 34a portion is brought into contact with the ground, allowing stable movement without impact.

Also, during normal running on flat ground, each roller 3
There is a gap t between 4a, 34b and the core metal 36 of the crawler 2, so that they do not interfere with each other, so that no shock or vibration occurs, and therefore, the machine can run smoothly with less vibration.

Furthermore, the equalizer rollers 34a and 34b are inner wheels and have less load burden, whereas the track roller 26 is an outer wheel.
It is possible to reduce the size of a and 34b and the roller diameter, and when the roller diameter is made smaller as shown in FIG. 6, a roller retraction groove A can be formed in the track frame 3 as shown in FIG. is no longer necessary, and the configuration can be made more compact.

"Effects of the Invention" As is clear from the above embodiments, the present invention provides a plurality of sets of track crawlers 26, each pair being a left and right pair, on both the left and right sides sandwiching the crawler core metal 36 on the inner peripheral surface of the lower part of the crawler 2... ...and support crawler 2.
Equalizer roller 34 brought into contact with the lower inner peripheral surface
a, 34b, a guide groove 36b is formed on the inner peripheral surface of the crawler 2 at approximately the center of the left and right width, and the equalizer is placed in the guide groove 36b on the lower side of the crawler 2 in a non-pressurized state. The rollers 34a and 34b are arranged opposite each other, and the equalizer rollers 34a and 34b are arranged in a guide groove 36b in the crawler 2, so when the equalizer action is not required, such as when traveling on flat land, the equalizer rollers 34a and 34b are The equalizer roller 34 is supported in a non-acting state with respect to the crawler 2.
The vibration and noise generated by rollers a and 34b can be easily reduced, and the crawler 2 presses against the equalizer rollers 34a and 34b only when climbing over a convex surface such as a ridge, and the track rollers 26 support both edges. Since the equalizer rollers 34a, 34b are arranged in the center of the crawler 2, the load borne by the equalizer rollers 34a, 34b is set smaller than before, and the equalizer rollers 34a,
34b structure can be easily simplified and downsized.

[Brief explanation of the drawing]

Fig. 1 is a sectional explanatory view of the main part, Fig. 2 is an overall side view, Fig. 3 is a plan view of the same, Fig. 4 is an explanatory side view of the crawler section, Fig. 5 is a partially enlarged side view, Fig. 6 FIG. 3 is an explanatory diagram showing another example of a modified structure. 2... Crawler, 26... Truck crawler, 3
4a, 34b... Equalizer roller, 36... Core metal, 36b... Guide groove.

Claims (1)

[Scope of utility model registration request] An equalizer that supports the left and right sides of the crawler core bar 36 on the inner peripheral surface of the lower part of the crawler 2 by a plurality of sets of track rollers 26, each pair of left and right being one pair, and that also makes contact with the inner peripheral surface of the lower part of the crawler 2. In a crawler-type traveling device for agricultural machinery including rollers 34a and 34b, a guide groove 36b is formed approximately in the center of the left and right widths on the inner circumferential surface of the crawler 2, and the guide groove 36b on the lower side of the crawler 2 is in a non-pressurized state. A crawler-type traveling device for agricultural machinery, characterized in that equalizer rollers 34a and 34b are arranged facing each other.