JPS5930372B2 - Combine harvester - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reaping and traveling interlocking device for a combine harvester.

Conventional combine harvesters in which only the running section is driven by continuously variable speed hydraulics include the following methods for driving the reaping section.

(Here, the reaping section refers to a so-called reaping pre-processing device including a conveying device.) a.

A method in which the reaping section is driven independently at a constant speed. b.

A system in which the reaping section is driven at continuously variable speed via a traveling transmission.

The system a is as shown in FIG. 1, in which the reaping section is driven at a constant speed from the engine 1 via a gear transmission mechanism,
It consists of a variable displacement reversible fluid pump 3 that is interposed in a power transmission system between an engine 1 and a crawler 2, a fluid motor 4, and a auxiliary transmission transmission 5.

In the figure, 6 is a skeleton of a reaping gear box, 7 is a conveyance device, and 8 is a cutting blade.

System b is as shown in Fig. 2, in which the crawler 2 is driven by an engine 1 through a traveling transmission consisting of a reversible fluid pump 3 with a variable discharge rate, a fluid motor 4, and an auxiliary transmission transmission 5. The section 6°1.8 is driven by this traveling transmission in a continuously variable speed manner.

And if we show the speed relationship diagram of a and b above, it will be shown in Figure 3.4.A.9.
Figure 3 A9 shows the case a, and that shows the case where the reaping gear is engaged.

Portion A5 in FIG. 4 shows the case b, and the hole is the same as the case in FIG. 3.

By the way, in case a above, since the traveling section and the reaping section are not synchronized, the conveying posture of the culms is significantly disturbed due to changes in the working speed, resulting in problems such as clogging of the culms and unhandled culms.

In case b, the traveling part and the reaping part are perfectly synchronized, so during normal work the posture of the culm remains constant regardless of the speed, but during very low speed work the speed of the cutting blade decreases too much and the culm cannot be reaped sufficiently. This is not done and stock withdrawals occur.

To compensate for this, countermeasures such as installing an auxiliary gear in the reaping section have been considered, but they are only insufficiently effective.

The present invention was invented in view of the above points, and the traveling part is hydraulically driven, and only the cutting blade or the entire cutting blade is hydraulically driven in a separate system, and this is separated from the traveling part in a high-speed range. The swash plate angle adjustment lever of the variable discharge rate reversible fluid pump in the travel drive hydraulic drive system and the variable discharge rate reversible fluid pump in the reaping drive hydraulic drive system are synchronized only at low speeds and driven at a constant speed in the low speed range. The swash plate angle adjustment lever of the pump is interlocked with each other by a link mechanism.

The embodiments shown in the drawings will be described below.

FIG. 5 shows an example of this, and the crawler 2 is driven by an engine 1 through a traveling transmission consisting of a reversible fluid pump 3 with a variable discharge amount, a fluid motor 4, and an auxiliary transmission transmission 5, and is driven by a reaping gear. The reaping section consisting of a box 6, a conveyance device 7, and a cutting blade 8 is operated by a separate system from the engine 1, including a fluid pump 9 of a variable discharge rate reversible type and a fluid motor 10. It is driven via a continuously variable transmission consisting of.

Figure 6 shows another example in which the transmission device 9-10 drives only the cutting blade 8 via the gear box 11, and the conveying device 7 of the reaping section is driven by the traveling transmission. This is how it was done.

The speed relationship between the traveling part and the reaping part or cutting blade in the hydraulic drive system as described above can be synchronized only in the high speed range by using an interlocking link mechanism as described below, and driven at a constant speed in the low speed range. Can be done.

That is, as shown in FIG. 7, the swash plate angle adjustment lever 12 of the fluid pump 3 shown in FIGS. 5 and 6, which is a hydraulic drive device for traveling drive, and the hydraulic drive device shown in FIGS. 5 and 6, which is a hydraulic drive device for reaping drive. The swash plate angle adjustment lever 13 of the fluid pump 9 can be interlocked with the swash plate angle adjustment lever 13 by an interlocking link 14.
2 can be operated directly by hand.

Thus, the pin 16 of the lever 12 is engaged with the elongated hole 15 of the interlocking link 14, and a stopper 17 is provided for the lever 13.

When using the above-described interlocking mechanism, when changing the traveling speed by directly operating the swash plate angle adjustment lever 12 by hand, moving the lever 12 to the right in the diagram moves the lever 12 forward and moves the power to the left. Go backwards.

The pin 16 of the lever 12 is engaged with the elongated hole 15 of the interlocking link 14, and because of this elongated hole 15, the lever 12 moves backward, that is, from the neutral position where the lever 12 is upright, to the left. The low forward speed range up to the lever position A1 becomes a dead zone of the elongated hole 15, and no matter how much the lever 12 is operated, the swash plate angle adjustment lever 13 of the reaping section does not move.

When the lever 12 is moved to the right beyond A1 and operated as shown in A2, the pin 16 pushes the elongated hole end of the interlocking link 14, so that the lever 13 is operated.

The operating range of the lever 13 is limited by a stopper 11 so that it does not rotate to the left beyond a certain angle, that is, the corresponding position between A1 and B1.

As described above, when the fluid pumps 3 and 9 shown in FIGS. 5 and 6 are interlocked using the interlocking link mechanism, the relationship between traveling and reaping speed can be changed as shown in FIG. 8.

In addition, when only the cutting blade is driven once, the result is as shown in FIG. 9.

In any case, the present invention hydraulically drives the traveling section, and hydraulically drives only the cutting blade or the entire reaping section in a separate system, synchronizes it with the traveling section only in the high speed range, and keeps it constant in the low speed range. A swash plate angle adjustment lever of a variable discharge rate reversible fluid pump in a traveling drive hydraulic drive device and a swash plate angle adjustment lever of a variable discharge rate reversible fluid pump in a reaping drive hydraulic drive device so as to be driven at speed. This applies force to the reaping and traveling interlocking device of the combine, which are connected to each other by a link mechanism.At high speeds, the traveling section and the cutting blade or reaping section are synchronized, so the conveying posture of the culm may be disturbed. There are no clogged culms or untreated culms.

Also, in the low speed range, the culm can be adequately harvested because the speed is kept constant and the speed does not drop more than necessary.

Therefore, the swash plate angle adjustment lever of the variable discharge rate reversible fluid pump in the hydraulic drive device for traveling drive and the hydraulic pressure 1 for reaping drive
Since the swash plate angle adjustment lever of the variable discharge rate reversible fluid pump in the drive device is interlocked with each other by a link mechanism, the mechanism is much simpler than the drive device described in Japanese Patent Publication No. 17813/1983, and the mechanism is much simpler than the clutch. There are no worn parts (therefore, there is no trouble with the device, and operation is reliable), and the range of interlocking can be adjusted arbitrarily depending on how the link mechanism is installed.

[Brief explanation of drawings]

Figures 1 and 2 are schematic diagrams showing different reaping unit drive systems in a conventional combine harvester, Figures 3 and 4 are diagrams showing the relationship between reaping travel speeds, and Figures 5 and 6 are diagrams showing different embodiments of the device of the present invention. FIG. 1 is a schematic view of the interlocking linkage mechanism of the apparatus of the present invention, and FIGS. 8 and 9 are diagrams of the reaping traveling speed relationship of the same as above. 1... Engine, 2... Claw 7.3
t 9...Fluid pump, 4,10...
・Fluid motor, 1... Conveyance device, 8...
Cutting blade, 12... Swash plate angle adjustment lever of the hydraulic drive device for traveling drive, 13... Swash plate angle adjustment lever of the hydraulic drive device for reaping drive, 14... Interlocking links.

Claims (1)

[Claims] 1 The running part is hydraulically driven, and the entire cutting blade is also hydraulically driven in a separate system, synchronized with the running part only in the high speed range, and driven at a constant speed in the low speed range. The swash plate angle adjustment lever of the variable discharge volume reversible fluid pump in the travel drive hydraulic drive system and the swash plate angle adjustment lever of the variable discharge volume reversible fluid pump in the reaping drive hydraulic drive system are interlocked with each other by a link mechanism. Combine harvester reaping and travel interlocking device.