JPS584412Y2 - Load control device in combine harvester - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a load control device for a combine harvester, and more specifically, to a load control device that controls the working speed to an appropriate speed based on the load of the threshing section of the combine harvester.

Conventionally, this type of control device has been disclosed in Japanese Patent Publication No. 49-34494, Japanese Patent Publication No. 49-9172, or Japanese Utility Model Publication No. 49-49.
As seen in Japanese Patent No. 35881, etc., the load detection device was configured to detect only the load on the handling barrel shaft of the threshing machine.

For this reason. For example, when working in a soft field where the traveling equipment is largely submerged from the field surface, even if the load on the traveling equipment is very large, if the load of the threshing sideways j is small, a speed increase command is issued and the prime mover is There were drawbacks such as stalling.

This invention takes the following technical measures from the above point of view.

That is, a drive shaft 12 that drives the threshing machine 5 side of the combine and a drive shaft 17 that drives the traveling device 2 side are configured to be transmitted from the rotating shaft 6 that is transmitted and rotated from the prime mover side, and the drive shaft 17 is connected from the rotating shaft 6 to the drive shaft 17. A transmission device 30 is interposed in the power transmission mechanism to the rotary shaft 6, and a load detection device 27 is provided on the rotary shaft 6 to detect the added load on the threshing machine 5 side and the traveling device 2 side.
A load control device for a combine harvester, in which the load detection device 27 and the transmission device 30 are interlocked and connected via a control device 29 so as to reduce the traveling speed when the load of the combine harvester deviates from a predetermined appropriate range and detects a small load. The structure is as follows.

Hereinafter, one embodiment of this invention will be described in detail from the drawings. 1 is a chassis equipped with a traveling device 2, and a reaping section 3, a control section 4, and a threshing machine 5 are sequentially arranged from the front side. This is a combine harvester configured to perform reaping and threshing operations on planted grain culms.

Reference numeral 6 has a transmission pulley 8 which is rotatably mounted on a gear box 7 via a bearing and is fixed to the transmission pulley 8, which is provided so as to be interlocked with the prime mover.
This is the axis of rotation.

Reference numeral 9 denotes an automatic drive pulley integrally attached to a drive shaft 12 having a bevel gear 11 that meshes with a bevel gear 10 fixed to the rotating shaft 6, and is configured to drive the threshing machine 5.

30 is a transmission, which connects the rotating shaft 6 and a traveling device 2 to be described later.
The drive shaft 17 is interposed between the drive shaft 17 and the drive shaft 17.

13 is a small-diameter wheel, and 14 is a large-diameter wheel, which are fixed to the rotating shaft 6 via a key 15.

Reference numeral 16 denotes a large-diameter wheel that is loosely fitted onto the drive shaft 17 that drives the traveling device 2, and 18 is a small-diameter wheel that is fixed thereto.
It is configured so that it can be linked via.

20 is a tensioning device for tensioning and loosening the endless band 21 wound around the small-diameter wheel 13 and the large-diameter wheel 16; 22 is a tensioning device for tensioning and loosening the endless band 23 wound around the large-diameter wheel 14 and the small-diameter wheel 18; a tensioning device 20.22, the tensioning device 20.22
are connected by the connecting arm 24, and the wire 2
5, the latch lever 26 is connected to a moving latch lever 26 which is rotatably and stopably mounted on the machine frame near the control section 4.

Reference numeral 27 is a detection device attached to the rotating shaft 6 to detect the load, and has a switch 27a that energizes the solenoid 28 when the number of revolutions of the rotating shaft 6 deviates from an appropriate range.

Reference numeral 29 denotes a hydraulic pump 29a, a solenoid valve 29b operated by the excitation/demagnetization action of the solenoid 28, and a cylinder 29C provided so as to be able to communicate with the solenoid valve 29b.
The control device is composed of a piston 29d connected at one end to the tension device 22 and slidably mounted on the cylinder 29c.

Next, its effect will be explained.

First, when the prime mover is started and the latch lever 26, which drives and runs each rotating part of the aircraft, is rotated in the direction of arrow A, the connecting lever 25
and tensioning device 20.2 via connecting arm 24.
2 rotates upward and tensions the endless band 21.23, so
The power from the prime mover is transmitted from the rotating shaft 6 to the wheel body 14 to the wheel body 18 to the drive shaft 17 to drive the traveling device 2 and move the machine forward.

At the same time, a pair of bevel gears io,
The drive shaft 12 on the side of the threshing machine 5 is transmitted and rotated via ii.

Then, as one machine moves forward, the husk in the field is harvested by the reaping section 3 and sent to be sent to be threshed by the threshing machine 5.

At this time, on the rotating shaft 6 driven by the prime mover.

The load on the traveling device 2 side and the load on the thresher 5 side are applied at the same time, and the added load of both is detected by the load detection device 27.

Therefore, for example, when the field conditions are good and the traveling load is small so that the traveling device 2 does not sink too much below the field, even if the load on the threshing machine 5 side is somewhat large, the reaping and threshing work can be carried out efficiently without reducing the working speed. On the other hand, when the running load becomes heavy in a soft field where the running equipment sinks,
If the load on the threshing machine 5 side becomes a little small, the working speed will be reduced and the engine will not be overloaded and stalled.

To explain this effect in detail, first, when an overload exceeding a predetermined range is applied to the rotating shaft 6 and its rotational speed decreases, the switch 27a of the load detection device 27 is turned on and the solenoid 28 is energized. .

Then, the solenoid valve 29b is activated by the hydraulic pump 29a.
The oil from the tank is directly returned to the oil tank.

Therefore, the oil in the cylinder 29c is also returned to the oil tank, and the piston 29d operates in the direction of the arrow under the tension of the spring.

Therefore, the tension device 22 releases the tension on the endless band 22.

Therefore, from one rotation axis 6, small diameter ring body 13 → endless band 21
→The drive shaft 17 is transmitted and rotated via the dog wheel body 16, and the traveling speed is reduced.

Conversely, when the load on the rotating shaft 6 decreases due to load fluctuations on the traveling device 2 side and the threshing machine side, the switch 27a of the load detection device 27 is turned OFF and the excitation of the solenoid 28 is stopped.

Therefore, the solenoid valve 29b is switched in the opposite direction to the above, and the oil from the hydraulic pump 29a is transferred to the cylinder 29c.
The piston 29d is sent inward to protrude.

Therefore, the endless belt 23 is tensed and the traveling speed is increased.

In this way, the reaping and threshing work is performed while automatically controlling the load.Finally, to stop the machine from moving, operate the moving latch lever 26 in the opposite direction of arrow A, and press the one-car tension device 20.22. It is better to release the tension on the endless bands 21 and 23.

Since this invention has the above-described configuration, the speed change mechanism of the traveling device is controlled by load detection in which the load on the traveling device side and the load on the thresher side are added.

If the field conditions are bad and the running load is small, the running speed will be reduced even if the load on the threshing machine becomes a little large, and conversely, if the field conditions are good, even if the load on the threshing machine becomes very large, the running speed will be reduced. Automatic control is performed without reducing the traveling speed, and there is an effect that accurate automatic control can always be performed without causing situations such as unexpected stalling of the prime mover.

[Brief Description of the Drawings] Figure 1 is a side view of a folded combine harvester according to an embodiment of this invention, Figure 2 is a sectional view showing the main transmission mechanism, and Figure 3 is a one-way clutch. Figure 4 is a side view of the main part, Figure 5 is a hydraulic circuit diagram. FIG. 6 is an electrical circuit diagram of the main part. Symbols in the figure: 2 is a traveling device, 5 is a threshing machine, 6 is a rotating shaft, 1
2 is a drive shaft of the threshing machine, 17 is a drive shaft of a traveling device, 27 is a load detection device, and 30 is a transmission device.

Claims (1)

[Scope of utility model registration request] A drive shaft 12 that drives the threshing machine 5 side of the combine and a drive shaft 17 that drives the traveling device 2 side are configured to be transmitted from the rotating shaft 6 that is transmitted and rotated from the prime mover side, and A transmission device 30 is interposed in the power transmission mechanism, and a load detection device 27 is provided on the rotating shaft 6 to detect the added load on the threshing machine 5 side and the traveling device 2 side, and the load on the rotating shaft 6 is set to a predetermined level. The load detection device 27 and the transmission device 3 are configured to increase the running speed when a small load is detected outside the appropriate range, and to reduce the running speed when a large load is detected.
0 through a control device 29.