JPS5820089Y2 - Reaping and harvesting machine operating device - Google Patents

Description

[Detailed Description of the Invention] The present invention operates in conjunction with the raising and lowering operation of a drive mechanism that raises and lowers the reaping section connected to the machine, and disengages and engages the power intermittent clutch for the reaping section with the raising operation. The present invention relates to an operating device for a reaping harvester, such as a combine harvester, which is equipped with an electric interlocking mechanism that activates when the lowering operation is performed.

According to this type of operating device for a reaping/harvesting machine, the raising and lowering of the reaping section necessary for turning the machine and the operation of intermittent power supply to the reaping section can be performed with a single lever operation, including turning the machine. , it is possible to simplify and facilitate operation, but on the other hand, when the reaping section is raised to adjust the cutting height during reaping and harvesting work, the power transmission to the reaping section is cut off, so the reaping and harvesting In order to perform the work reliably and safely without leaving any mowing residue, it is necessary to devise a mechanism to cancel the automatic stop operation of the reaping section when the reaping section is raised to adjust the cutting height.

In view of this, the present invention has a simple structure added, and when the reaping section is raised or lowered as the machine turns, the reaping section is moved up and down in conjunction with the raising and lowering of the reaping section by simply operating a single lever. An object of the present invention is to provide an operating device for a reaping/harvesting machine that can intermittent the power of the reaping section and maintain the state of power transmission to the reaping section when the reaping section is raised in the adjustment of the cutting height.

The technical feature of the operating device for a reaping harvester according to the present invention is that a delay circuit is interposed in the electric interlocking mechanism to disengage the clutch when the lifting operation of the lifting drive mechanism continues for a set time. It has the following advantages.

In other words, according to the present invention, the amount of elevation of the reaping section when the machine is turned is much shorter than that when adjusting the cutting height, and therefore, the amount of time required for raising and lowering the reaping section when the machine is turning is shorter than that when adjusting the cutting height. Focusing on the long length of the reaping section, the power transmission to the reaping section is cut off only when the raising operation using a single lever continues for a set time, so when the reaping section is raised as the machine turns, While the operation of the reaping section can be stopped, when the reaping section is raised to adjust the cutting height,
The driving state of the reaping section can be maintained.

Moreover, since the interlocking mechanism that operates the power intermittent clutch in conjunction with the lifting and lowering operations of the lifting drive mechanism is an electrical interlocking mechanism, it is advantageous to incorporate a delay circuit, and a variable timer can be used as the delay circuit. By using
The delay time can be freely changed and the structure can be easily changed.

Therefore, the present invention is essentially a machine turning operation that simultaneously raises and lowers the reaping section while intermittent power is applied to the reaping section while maintaining the excellent operability of only one lever operation.
It has now been possible to provide an operating device for a reaping harvester that can perform a cutting height adjustment operation that only raises and lowers the reaping section.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows the pre-processing section of a combine harvester (reaping and harvesting machine), and this pre-processing section consists of a crawler traveling device 6 and a threshing section 7.
A weeding tool 8, a pulling device 9,
A reaping section 2 equipped with a cutting blade 10 is connected to the threshing section 7 as a fulcrum so as to be able to swing up and down freely, and two swinging frames of the reaping section 2 transport the harvested husk to the threshing section 7. The device 11 is installed and configured.

Note that 12 is a driver's seat connected to the machine 1, and 13 is an operation box provided near the front of the driver's seat.

FIG. 2 shows the elevating and lowering drive mechanism 3 of the reaping section 2 in the combine, the mechanism for intermittent power transmission to the reaping section 2, and the operating devices therefor.

As shown in FIG. 1, the drive lifting mechanism 3 includes a single-acting hydraulic cylinder 14 that acts on the reaping section 2 and forcibly raises the reaping section 2 by extending it, and a hydraulic pump 15 for the single-acting hydraulic cylinder 14. In the middle of the hydraulic pressure supply path 16 from the hydraulic pump 15 to the hydraulic cylinder 14, there is a first state in which the cylinder 14 is energized and activated to extend the hydraulic cylinder 14 in order to communicate and connect the cylinder 14 to the pump 15 side, and a first state in which the hydraulic cylinder 14 is extended and activated. In other words, there is a state in which the supply path 16 is closed and the extending and contracting posture of the hydraulic cylinder 14 is fixed, and a state in which the cylinder 14 is energized and operated to communicate and connect the cylinder 14 to the oil tank 17 side.
By installing a three-position solenoid valve 18 that can be freely switched to a second state that allows contraction due to the weight of the reaping section, the reaping section 2 is forced to rise, while the reaping section 2 is lowered naturally. It is designed to be carried out in a specific manner.

In addition, 19 is a relief valve, and 20 is a throttle that provides resistance to the return oil from the hydraulic cylinder 14 and provides resistance to the lowering of the reaping section 2.

The mechanism for intermittent power transmission to the reaping section 2 is
A clutch 4 is interposed in the power transmission system to the engine, and a servo motor 21 is provided to operate the clutch 4 on and off.

The operating device is provided with an operating lever 22 on the operating box 13 that can swing freely between three positions, and an electric interlocking mechanism 5 between the lever 22, the electromagnetic valve 18, and the servo motor 21. It is set up and configured.

When the lever 22 is operated to the one end position of the swing path, the electric interlocking mechanism 5 operates the solenoid valve 8 to be energized to the first state, energizes the servo motor 21 in the direction of disengaging the clutch 4, and operates the servo motor 21 in the direction of disengaging the clutch 4. 22 is operated to the other end position of the swing path, the solenoid valve 18 is energized and operated in the second state, the servo motor 21 is energized in the clutch 4 engagement direction, and the lever 22 remains in the intermediate position. When operated, the solenoid valve 18 and the servo motor 21
It is configured to cut off the power supply to.

Therefore, in this embodiment, the electrical interlocking mechanism 5 includes:
A timer-using delay circuit 23 is incorporated to operate the servo motor 21 in the direction of disengaging the clutch 4 after a set time has elapsed after the lever 22 is operated to one end position of the swing path.
Moreover, this delay circuit 23 is configured such that the set time can be changed.

[Brief explanation of drawings]

The drawings show an embodiment of the operating device for a reaping harvester according to the present invention, with FIG. 1 being a side view of the main parts of a combine, and FIG. 2 being a control system diagram. DESCRIPTION OF SYMBOLS 1... Main machine, 2... Reaping part 3... Lifting drive mechanism, 4... Clutch, 5... Electric interlocking mechanism.

Claims (1)

[Scope of utility model registration request] A drive mechanism 3 that raises and lowers the reaping section 2 connected to the machine 1
In the operation device for a reaping harvester, the operating device for a reaping harvester is provided with an electric interlocking mechanism 5 that disengages a power intermittent clutch 4 for the reaping section in conjunction with the lifting operation of the reaping section, and disengages the clutch 4 when the lifting operation is performed, and operates the clutch 4 to a large extent when the lowering operation is performed. Operation of a reaping harvester characterized in that a delay circuit 23 for disengaging the clutch 4 when the raising operation of the mechanism 3 continues for a set time is interposed in the electric interlocking mechanism 5. Device.