JPH0446531B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for using a plurality of hydraulic clutches for shifting,
A reaping harvester such as a combine or a binder, which is equipped with a hydraulically operated traveling transmission that is selectively activated by pressure oil supplied from a control valve to perform multiple traveling speeds, and a pre-processing device clutch. Regarding.

[Prior art]

In this type of reaping harvester, when the gear is changed to neutral and stopped during operation, generally,
This stops the driving of the reaping device and lifting device of the pre-processing device. Conventionally, driving and stopping of the pretreatment device has been performed by a separate operation.

In this way, when the drive of the pre-processing device is stopped by a separate operation, there is a timing difference between the neutral operation of the transmission and the stop operation of the pre-processing device, which may cause the hoisting device to still operate even though the aircraft is stopped. In some cases, the hoisting device may stop first even though the machine is still running due to inertia, resulting in uncut grain culms being pulled to dry or pushed down.

Therefore, as a means to prevent the shift in operation timing, it is conceivable to interlock the speed change operation lever and the clutch lever of the pre-processing device via a link mechanism or the like.

However, in this type of general reaping and harvesting machine, the inertia of the machine body is greater than that of the hoisting device, so the hoisting device stops first before the machine stops moving, and when the machine stops moving, There is an inconvenience that the uncut grain culm is pushed down and the uncut grain culm is torn into pieces when the aircraft starts.

The present invention is of a type in which the stopping of the machine body and the driving stop of the pre-processing device are linked, and an object of the present invention is to prevent the grain culm from being pushed down or torn into shreds when the machine body stops running and starts.

[Means for Solving the Problem] The characteristic configuration of the present invention for achieving the above object is to selectively operate a plurality of hydraulic clutches for shifting by supplying pressure oil from a control valve, A reaping/harvesting machine equipped with a hydraulically operated traveling transmission that performs a multi-stage traveling transmission, and a clutch of a pre-processing device equipped with a pulling device, a reaping device, and a harvested grain culm conveying device, and which is equipped with a pressure oil supply. a hydraulic actuator for disengaging the clutch of the pre-treatment device by means of a hydraulic actuator, and when the control valve is in a neutral state cutting off pressure oil supply to the transmission hydraulic clutch;
The pressure oil supplied to this control valve is guided to the hydraulic actuator, and further, during the supply path to the hydraulic actuator, a delay line is provided to operate the hydraulic actuator after a certain period of time after the control valve is operated to the neutral position. The point is that the device was installed.

[Effect]

According to the above configuration, by switching the control valve from forward to neutral, pressure oil is supplied to the hydraulic actuator that disconnects and operates the clutch of the pretreatment device, and the drive of the pretreatment device is stopped and the operation is stopped. A delay device provided in the circuit disengages the clutch of the pre-processing device after a certain period of time, and synchronizes the stopping of the aircraft with the stopping of the driving of the pre-processing device.

〔Effect of the invention〕

Therefore, although it is an interlocking type in which the operation to stop the aircraft running and the operation to stop driving the preprocessing device are performed at the same time, by providing a delay device, it is possible to completely stop the aircraft and completely stop the preprocessing device based on the difference in inertia force. It has become possible to reduce the difference in timing of stopping, and it has become possible to prevent uncut grain culms from being pushed down or pulled to shreds.

〔Example〕

FIG. 3 shows a combine harvester as an example of a reaping harvester, which is equipped with a pair of left and right crawler running devices 1, 1, and a running vehicle body 3 equipped with a threshing device 2.
A pre-processing device 7 equipped with a lifting device 4, a reaping device 5, and a harvested grain culm conveying device 6 is connected to the front part of the preprocessing device so as to be movable up and down.

FIG. 2 schematically shows the transmission system, and shows the traveling vehicle body 3.
The output from the engine 8 installed in the threshing device 2
The transmission system is divided into a transmission system for traveling and a transmission system for driving the pretreatment equipment. The latter branched output is transmitted to the input shaft 10 of the traveling mission case 9 via a belt via a tension clutch type main clutch 11, and then further branched to the traveling system and the pretreatment device transmission system.

In other words, part of the power of the input shaft 10 is
PTO shaft 13 via low two-speed gear transmission 12
From there, it is transmitted by a belt to the input shaft 15 of the pretreatment device 7 via a tension clutch type pretreatment clutch 14.

A part of the power of the transmission case input shaft 10 is transmitted to a three-stage auxiliary gear transmission 16, a three-stage forward gear transmission,
The left and right axles 19,
19.

The main gear transmission 17 includes a multi-plate hydraulic clutch 20a in a transmission system of a pair of regular gears forming each gear stage.
20b, 20c, 20d, respectively, and are configured as a hydraulically operated traveling transmission device that selectively supplies pressurized oil to these hydraulic clutches 20a, 20b, 20c, 20d, etc. to transmit transmission at a desired gear position. There is.

When operating the gear transmission 12 of the pre-processing device transmission system and the auxiliary gear transmission 16 of the traveling system, the main clutch 11 is operated, and the operation of the main gear transmission 17 is shown in FIG. This is done only by operating the control valve 21 built into the clutch operating hydraulic circuit.

That is, by switching the control valve 21 to the F ₁ , F ₂ , F ₃ and R positions, the first forward speed hydraulic clutch 20a and the second forward speed hydraulic clutch 20
b. Pressure oil is selectively supplied to the forward three-speed hydraulic clutch 20c and the reverse hydraulic clutch 20d to obtain a clutch engaged state of the transmission system, and to set the control valve 21 to the N position. By switching, the pressure oil from the full hydraulic clutches 20a, 20b, .

When the control valve 21 is operated to the neutral N position, pressure oil is supplied to the hydraulic cylinder 23 for disengaging the pretreatment clutch 14 via the relief valve 22, so that the pretreatment clutch 14 is disengaged. ing.

An accumulator 24 is interposed as a delay device in the supply path to the hydraulic cylinder 23 for disengaging the pretreatment clutch, and the operating pressure of the hydraulic cylinder 23 reaches a value set by the main relief valve 25. After a certain period of time after the control valve 21 is operated to the neutral position N, the relief valve 22 opens and the supply of pressure oil to the hydraulic cylinder 23 is started, which means that the aircraft is completely lifted. The pre-treatment clutch 14 is set so that the time when the trigger stops and the time when the drive of the lifting device completely stops is approximately synchronized.
is configured to be cut. Furthermore, the control valve 21
When the gear shift position is switched from the neutral position to the gear shift position, the hydraulic cylinder 23 is automatically restored by an internal spring, and the pretreatment clutch 14 is engaged and operated.

Hydraulic clutches 20a and 20b of the control valve 21
An accumulator 26 is connected to the primary side of the vehicle, and suppresses a sudden increase in the clutch operating pressure when the gear is changed from the neutral position, thereby alleviating the shock of starting the vehicle.

In addition, each hydraulic clutch 20a, 20b...
Lubricating oil is supplied to the multi-disc friction portion of the clutch at a pressure set by a low pressure relief valve 27.

Also, when the forward gear is operated from the neutral position, the start of the aircraft is delayed by one tempo as described above.
In order to prevent the pretreatment clutch 14 from engaging first during this delay, an orifice 34 is incorporated in the shift position of the control valve 21 to resist the flow of waste oil from the hydraulic cylinder 23.

The gear shift lever 28 of the hydraulic clutch 20a...
is connected via a rod 31 to a tension arm 30 of the main clutch 11 operated by a pedal 29, and the rod 31 passes through a cylindrical member 32 provided on the gear shift lever 28, and its protruding end A nut 33 is screwed into the main clutch 11, and when the pedal 29 of the main clutch 11 is depressed to the OFF position, the nut 33 comes into contact with the cylindrical member 32 of the speed change lever 28, and the speed change lever 28, which is in the reverse operation position R, comes into contact with the cylinder member 32 of the speed change lever 28. is operated to the neutral position N, and it is conveniently designed so that the pedal can also be used to return the vehicle to the neutral position when the vehicle is turned around and reversed.

The pretreatment clutch 14 is configured to be preferentially manually disengaged by a pretreatment clutch lever 35.

In place of the hydraulic cylinder 23, a forward/reverse operating type hydraulic motor may be used, and these hydraulic cylinders and hydraulic motors are collectively referred to as a hydraulic actuator for operating the pretreatment clutch.

[Brief explanation of the drawing]

The drawings show an embodiment of the reaping harvester according to the present invention, in which Fig. 1 is a hydraulic circuit diagram, Fig. 2 is a schematic diagram of the transmission system, Fig. 3 is an overall side view of the combine harvester, and Fig. 4 is a schematic diagram of the transmission system.
The figure is a side view showing the interlocking mechanism between the main clutch pedal and the gear shift lever, and FIG. 5 is an enlarged exploded perspective view of the main parts of the interlocking structure. 14... Pretreatment clutch, 20a... Hydraulic clutch for shifting, 21... Control valve, 23... Hydraulic actuator, 24... Delay device.

Claims (1)

[Claims] 1. Multiple gear shifting hydraulic clutches 20a, 20b
. . . are selectively operated by pressure oil supply from a control valve 21 to perform multi-stage travel gear shifting, a pulling device 4, a reaping device 5, and a reaped grain. The reaping/harvesting machine is equipped with a clutch 14 of a pre-processing device equipped with a culm conveying device 6, and is provided with a hydraulic actuator 23 for disengaging and operating the clutch 14 of the pre-processing device by supplying pressure oil. When the valve 21 is in a neutral state that cuts off the supply of pressure oil to the shift hydraulic clutch, the pressure oil supplied to the control valve 21 is guided to the hydraulic actuator 23, and further, in the supply path to the hydraulic actuator 23. The delay device 2 operates the hydraulic actuator 23 after a certain period of time after the control valve 21 is operated to the neutral position.
A reaping harvester equipped with 4.