JPS6029861Y2 - Gearbox for binding machine in combine harvester - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a transmission device for a tying machine in a combine harvester.

In conventional combine harvesters, power transmission generally involves dividing the output of the engine into parts, one of which is transmitted to a pre-processing section such as a hoisting device or reaping device along with the traveling section via a traveling transmission, and the other is transmitted to a pre-processing section such as a hoisting device or a reaping device. The power is transmitted to the threshing section without going through a transmission.

Generally, when processing wet or fallen materials with a combine harvester, the load on the threshing section becomes large and the threshing section becomes easily clogged. This is to make it possible to reduce the amount of lumbar culm supplied.

However, in such a combine harvester, if the tying machine is configured to be driven by the power from the threshing section, the tying machine will always rotate to obtain the highest efficiency of the threshing section, even though the amount of husk supplied is decreasing. This means that it is driven at a constant high rotational speed depending on the number of rotations.

In this way, if the binding machine always operates at a constant high rotation speed that is linked to the rotation speed that maximizes the threshing section's efficiency, not only will vibration and noise be extremely high due to the large number of reciprocating parts. This will significantly reduce the lifespan.

In addition, since the operating speed of the needle, bill, holder, etc. is always high, there is a tendency for bundling errors such as string breakage, holder falling out, and string grasping errors to occur easily.

In order to solve this drawback, when the traveling transmission is linked to drive the binding machine, the power transmission path connecting the traveling transmission and the binding machine located in the straw removal section of the threshing section becomes long. Therefore, there is a new problem that the power transmission device installed in the long power transmission path becomes complicated,
If the speed of the binding machine can be changed from a binding transmission that is separate from the travel transmission, there is an operational problem in that the speed of the binding transmission must be operated separately from the speed change of the travel transmission. be.

The purpose of the present invention is to solve the above-mentioned problems with conventional equipment, and to change the number of rotations of the binding machine along with the traveling speed so that it always rotates at a speed that matches the throughput of the threshing section. It is an object of the present invention to provide a speed change device for a tying machine in a combine harvester, which reduces noise, vibration, and occurrence of tying errors.

A transmission device for a binding machine in a combine harvester according to the present invention, which is distantly related to the above object, includes a power transmission path of a traveling system that transmits power from an engine to a preprocessing section via a traveling transmission device;
In a combine that is separate from the traveling transmission and has a power transmission path for the threshing system that is transmitted to the threshing section, the tying machine installed in the straw removal section of the threshing section is connected to the threshing system through the tying transmission. The binding transmission is configured to be drivable from the power transmission path, and the binding transmission and the traveling transmission are interlocked and the rotation speed of the binding machine is made proportional to the rotation speed of the traveling device,
The vehicle is characterized by being configured such that the speed can be changed from the driving transmission side.

Hereinafter, the present invention will be explained with reference to the figures.

FIG. 1 is a plan view of a conventional combine harvester, and FIG. 2 is a power transmission system diagram of the combine harvester.

In FIGS. 1 and 2, reference numeral 1 denotes an engine, and the power of the engine 1 is divided into parts, one of which is transmitted to a traveling transmission 3 via a continuously variable transmission 2 for traveling.

The traveling mission 3 uses a part of the power to drive the drive wheels 4 that rotate the crawler of the traveling device, and also drives the shell culm conveying device 6, the cutting blade device 7, the pulling device 8, etc. of the pretreatment section via the transmission shaft 5. Power is transmitted to 8'.

The other part of the power of the engine 1 is transmitted to the handling barrel shaft 11 of the handling barrel 10 in the threshing section via the transmission shaft 9, and in this case, there is a gap between the engine 1 and the handling barrel shaft 11 as described above. There is no continuously variable transmission involved, so the handling cylinder 10 is always rotated at a constant high rotational speed that provides maximum work efficiency.

Power is further transmitted from this handling barrel shaft 11 via a transmission shaft 12 to an input shaft 16 of a binding machine 15 along with a self-removal foot chain 13 and a straw removal chain 14.

As mentioned above, in the conventional device, power is transmitted to the binding machine 15 from the threshing section without any transmission, so it always rotates at a constant high rotational speed in line with the maximum efficiency of the threshing section. Vibration, noise, and bundling errors are unavoidable.

FIG. 3 is a plan view showing the main parts of the power transmission device in the transmission of the binding machine according to the present invention.

In the power transmission device of the present invention, the arrangement of the transmission shafts, etc. in the power transmission system in the conventional device described above is not substantially changed, and the pulley between the transmission shaft 12 and the input shaft 16 of the binding machine 15 is The transmission means for the belt is replaced with a continuously variable binding transmission 17 having the same configuration as the continuously variable traveling transmission 2.

The traveling transmission 2 is provided with a pair of split pulleys 18a*18b and 19a, 19b on the output shaft side of the engine 1 and the input shaft side of the traveling transmission 3, respectively.
A V-belt 20 is wound between 8a, 18b; 19a, 19b.

The split pulley 18a is slidable in the axial direction, has a speed change lever 21 on its outer surface, and is in contact with a speed change cam 22 that is slidable on the shaft.

This speed change cam 22 further has a fixed cam 23 paired therewith.
and are in contact with each other via the inclined surface A.

On the other hand, the split pulley 19a is slidably biased toward the split pulley 19b by a spring 24.

Therefore, by rotating the speed change lever 21, the speed change cam 22 changes the width of the groove between the split pulleys 18a and 18b that moves in the axial direction by the inclined surface A between the speed change cam 22 and the fixed cam 23.

Due to this change in the groove width of the split pulleys 18a and 18b, the groove width of the split pulleys 19a and 19b also changes via the V-belt 20, and the effective diameter changes, so the rotation speed of the input shaft on the traveling transmission 3 side changes. do.

The binding transmission 17 also has substantially the same configuration as the traveling transmission 2, and the output shaft side of the transmission shaft 12 is equipped with split boo's J24a, 24b, and the input shaft 1 of the binding machine 15 is mounted on the output shaft side of the transmission shaft 12.
Split boo' J25a, 25b are attached to the 6 side, and a V-belt 26 is wound around these split pulleys.

A speed change cam 28 having a speed change lever 27 is in contact with the axially slidable split pulley 24a, and a fixed cam 29 is in contact with this speed change cam 28 via an inclined surface opening.

On the other hand, the split pulley 25a, which is also slidable in the axial direction, is biased by the elastic force of a spring 30 toward the split pulley 25b.

The speed change lever 27 of the bundling transmission 17 and the speed change lever 21 of the traveling transmission 2 are connected by a connecting rod 31, and are in a mutually interlocking relationship.

Therefore, when the speed change lever 21 provided near the driver's seat is operated to change the traveling speed of the combine harvester, the input shaft 16 of the binding machine 15 is also changed to the same rotation speed by the binding transmission 17 via the connecting rod 31. The speed is changed by the gear ratio.

As mentioned above, in the device of the present invention, the rotation speed of the binding machine 15 is changed according to changes in the running speed, that is, the amount of culm supplied, and unlike conventional devices, the rotation speed of the binding machine 15 is changed at a constant high rotation speed. Vibration, noise, and bundling errors are reduced.

Moreover, these effects can be modified without making any major changes to the transmission system of the conventional device, so the cost advantage is extremely large.

As described above, the traveling device of the binding machine in the combine harvester of the present invention includes a power transmission path of the traveling system that transmits power from the engine to the preprocessing section via the traveling transmission, and the traveling transmission. In a combine harvester that is separate from the threshing system power transmission path that is transmitted to the threshing section, the tying machine installed in the straw removal section of the threshing section can be driven from the threshing system power transmission path via the tying transmission. In addition to configuring
interlocking and connecting the binding transmission and the traveling transmission;
Since the rotation speed of the binding machine is made proportional to the rotation speed of the traveling device and the speed can be changed from the traveling transmission side, the rotation speed of the binding machine changes in proportion to changes in the traveling speed of the combine.
Since the speed changes according to the throughput of the threshing section, it is possible to reduce noise, vibration, bundling errors, etc. of the bundling machine.

Moreover, since the tying transmission is provided between the transmission shaft from the handling barrel shaft and the input shaft of the tying machine, there is an advantage that the device can be manufactured without making any substantial changes to the conventional device.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a conventional combine harvester, FIG. 2 is a power transmission system diagram of the combine harvester, and FIG. 3 is a plan view showing essential parts of a power transmission device of a binding machine according to the present invention. 1... Engine, 2... Traveling transmission, 3... Traveling mission, 6... Culm conveying device, 7... Cutting blade device, 8, 8'...
...Lifting device, 11... Handling trunk shaft, 15...
... Binding machine, 16 ... Input shaft, 17 ...
・・Transmission device for bundling, 21.27 ・・Shift lever 31 ・・・Connection rod.

Claims (1)

[Scope of utility model registration request] Power from the engine is divided into a power transmission path for the traveling system that transmits power from the engine to the preprocessing section via the transmission for traveling, and a power transmission path for the threshing system that transmits the power to the threshing section separately from the transmission for traveling. In the combine harvester, the tying machine disposed in the straw discharging section of the threshing section can be driven from the power transmission path of the threshing system via the tying transmission, and the tying transmission and the traveling transmission What is claimed is: 1. A transmission for a binding machine in a combine harvester, characterized in that the speed change is possible from the traveling transmission side by interlocking and connecting the binding machine and the rotation speed of the traveling device.