JPS6133861Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement of a reaping pretreatment device for a self-propelled, self-extracting combine harvester.

Conventional technology When harvesting grain culms using a combine harvester, generally the grain culms planted in the field are harvested along straight rows, then the direction is changed, and then adjacent row grain culms are harvested. In that case, in order to ensure safety when changing direction, the pre-harvesting device, which consists of a grain culm lifting mechanism, a reaping blade mechanism, and a grain culm conveying mechanism, is raised above the field, and the reaping pre-processing device is Since the drive is stopped,
There was an inconvenience in that the lever had to be operated in a complicated manner when changing direction.

Therefore, Japanese Utility Model Application Publication No. 54-99838 as a prior art discloses that the power for driving the reaping pre-processing device, which is composed of a grain culm lifting mechanism, a reaping blade mechanism, and a grain culm conveying mechanism, is intermittent. If a lever for raising and lowering is connected via a delay circuit and the lever is operated to raise the pre-reaping device, the power transmission of the pre-reaping device will be cut off after a certain period of time, while It is proposed to reduce the burden on the operator by configuring the system so that when a lever is operated to lower the processing device, power is transmitted to the reaping pre-processing device after a certain period of time has elapsed.

Problems to be Solved by the Invention However, if the power transmission to the reaping pretreatment device consisting of the grain culm lifting mechanism, the reaping blade mechanism, and the grain culm conveying mechanism is interrupted as a whole as in the above publication, this power is As the load on the engine increases due to interruptions in transmission, the engine may momentarily reach high rotational speeds when the power transmission to the reaping pretreatment device is cut off, causing the machine's running speed to suddenly accelerate. As power is applied to the reaping pre-processing device, the traveling speed suddenly slows down, which not only makes the machine run unstable when changing direction, but also causes the threshing condition in the threshing section to fluctuate. There was a problem with that.

In addition, when the power transmission of the reaping pretreatment device is cut off after a certain period of time has passed after the lever operation as in the above publication, the time until the power is cut off is limited to However, in that case, it takes a certain amount of time to finish transporting the grain culms present in the pre-harvesting device, so if the pre-harvesting device is already raised. Despite this, the grain culm lifting mechanism and the reaping blade mechanism in the pre-harvesting device continue to idle, so there is also a problem in that safety cannot be ensured sufficiently when changing direction.

The object of the present invention is to solve the above-mentioned problem when power transmission is interrupted in relation to the vertical movement of the reaping pretreatment device.

Means for Solving the Problems Therefore, the present invention provides a combine harvester in which a reaping pretreatment device consisting of a grain culm lifting mechanism, a reaping blade mechanism, and a grain culm conveying mechanism is provided on the traveling machine body so as to be able to move up and down. A power transmission section to the culm lifting device and the reaping blade mechanism is made into a separate system from the power transmission to the grain culm conveying device, and power transmission to the power transmission section to the grain culm lifting device and the reaping blade mechanism is intermittent. a clutch is provided, and the clutch and the reaping pretreatment device are provided,
The clutch is engaged when the pre-reaping device is lowered, and the clutch is disengaged when the pre-reaping device is raised above a certain height.

Effects and effects of the invention With this configuration, when the reaping pretreatment device is raised to a certain position when changing direction, only the grain culm lifting mechanism and the reaping blade mechanism that are exposed to the outside of the reaping pretreatment device are driven. It is immediately stopped and the direction is changed in a safe manner, while the grain conveying device continues to be driven and continues to transport the already harvested grain stalks to the feed chain of the threshing section.

When the direction change is completed and the reaping pre-processing device is lowered to a certain position, the grain culm lifting mechanism and the reaping blade mechanism, which had been stopped, are both driven and the grain culm reaping operation for the next row is resumed. This is possible.

In this manner, the present invention intermittents power transmission to the grain culm lifting mechanism and the reaping blade mechanism while the grain culm transport mechanism of the reaping pretreatment device remains driven as the reaping pretreatment device is raised and lowered. This reduces engine load fluctuations caused by intermittent power transmission compared to when power transmission to the grain culm conveying mechanism, grain culm lifting mechanism, and reaping blade mechanism is simultaneously intermittent and intermittent as in the prior art. As a result, it is possible to prevent the running of the machine from becoming unstable when changing direction, and it is also possible to prevent fluctuations in the threshing condition in the threshing section. The drive of the grain culm lifting mechanism and the reaping blade mechanism can be stopped immediately, while once the grain culm has been harvested, it is transported to the feed chain side by the grain culm transport mechanism that continues to drive, thereby ensuring safety during direction changes. This has the effect of ensuring quality and improving the efficiency of reaping work.

Embodiment Next, an embodiment of the present invention will be described based on the drawings.
The upper surface of the fuselage 1 has a control column 3, a seat 4, an engine 5, and a paddy storage device 6 on one side, and a threshing section 8 equipped with a feed chain 7 on the other side. It is installed.

Further, at the front part of the machine body 1, there is a grain culm pulling mechanism 10 for raising and removing the grain culms planted in the field scene A, and a grain culm pulling mechanism 10 for reaping the grain culms raised by the grain culm pulling mechanism 10. A reaping pre-processing device 12 is provided, which includes a reaping blade mechanism 9 and a grain culm conveying mechanism 11 that clamps and transports the reaped grain culm to the feed chain 7. By moving the support frame 13 up and down with a hydraulic cylinder provided in the support frame 13, the entire structure can be raised and lowered.

The power from the engine 5 is transmitted to the traveling crawler 2 and the threshing section 8 via a drive mill (not shown).
etc., and is also belt-transmitted to the pulley 16 of the input shaft 15 of the reaping pre-processing device transmission mechanism 14, and the reaping pre-processing device transmission mechanism 14 has three output shafts 17, 18. .
1 to the drive shaft respectively.

Then, an output shaft 17 for the reaping blade mechanism 9
Electromagnetic clutches 20 and 21 are provided in the middle of the output shaft 18 and the grain culm pulling mechanism 10, respectively, and a circuit 22 connecting these clutches 20 and 21 with a power source is equipped with the pre-reaping treatment device. 1
When the reaping blade mechanism 9 in 2 is in the lowered position close to the field scene A, it is ON, and the reaping blade mechanism 9
OFF if rises above a certain height from field scene A
A limit switch 23 is provided so as to have the following values.

In addition, 24 is a switch for turning on/off the circuit 22 in priority to the limit switch 23, and the switch 24 can be opened and closed manually, or
Alternatively, a clutch (not shown) for connecting and disconnecting power to the transmission mechanism 14 for the reaping pretreatment device is configured to be opened and closed in conjunction with an operating lever for performing an on/off operation.

In the above configuration, when one or more grain culms planted in the field area A have been harvested, the pre-harvest treatment device 1 is raised significantly to change direction, and the pre-harvest treatment device 12 is lowered to harvest the adjacent grain culms. Grain culms will be harvested, and in that case, when the reaping pretreatment device 12 is raised to a certain height, the reaping blade mechanism 9 and grain culm lifting mechanism 10 in the reaping pretreatment device 12 are automatically driven. Since the mechanism stops, the reaping blade mechanism 9 and the grain culm lifting mechanism 10 are surely prevented from rotating idly while being raised, thereby causing damage to auxiliary workers and objects in the field, and from generating noise and vibration. On the other hand, since the grain culm conveying device 11 in the reaping pretreatment device 12 continues to be driven, all the grain culms that have already been harvested can continue to be conveyed toward the feed chain 7 during the direction change.

In this case, since the grain culm transport mechanism 11 is located inside the machine body, no safety problem will occur even if it continues to be driven.

After completing the direction change, the reaping pretreatment device 12
When it is lowered to a predetermined position, the reaping blade mechanism 9 and the grain culm lifting mechanism 10 are driven again, and the next row culm reaping operation can be resumed.

In this way, when the reaping pretreatment device 12 is raised when changing direction, the grain culm conveying mechanism 11 in the reaping pretreatment device 12 is driven.
Since the driving of the reaping blade mechanism 9 and the grain culm pulling mechanism 10 can be immediately stopped, safety can be ensured and work efficiency can be improved when changing direction. Since the grain culm pulling mechanism 10 alone can reduce the load fluctuations on the engine 5 due to its interruption, it is possible to prevent the running of the machine body 1 from becoming unstable when changing direction and from fluctuating the threshing state in the threshing section.

Note that an electromagnetic clutch 25 is also provided on the output shaft 19 to the grain culm transport mechanism 1, and the clutch 2
5 and the circuit 22 are connected to a switch 26 with delay means.
The grain culm conveying mechanism 11 is driven until the reaping pretreatment device 12 rises and a certain period of time has elapsed (time until the clamped grain culms are conveyed to the feed chain 7), and then the grain culm conveying mechanism 11 is stopped. on the other hand,
It may be configured such that the power is transmitted immediately when the pre-reaping treatment device 12 is lowered.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a plan view of the combine harvester, Fig. 2 is a side view of the combine harvester, and Fig. 3 is a side view of the combine harvester.
The figure is a control circuit diagram for power transmission. 1... Body, 2... Traveling crawler, 7... Feed chain, 8... Threshing section, 9... Reaping blade mechanism,
10... Grain culm lifting mechanism, 11... Grain culm conveying mechanism,
12... Reaping pretreatment device, 17, 18, 19...
Output shaft, 14...speed change mechanism, 20, 21...electromagnetic clutch, 23...limit switch.

Claims (1)

[Scope of utility model registration request] In a combine in which a reaping pretreatment device consisting of a grain culm lifting mechanism, a reaping blade mechanism, and a grain culm conveying mechanism is provided on a traveling machine so as to be able to be raised and lowered, a power transmission section to the grain culm lifting device and the reaping blade mechanism, The system is separate from the power transmission to the grain culm conveying device, and a clutch is provided in the power transmission section to the grain culm lifting device and the reaping blade mechanism for intermittent power transmission, and the clutch and the reaping pretreatment device are connected to each other. A reaping pretreatment device for a combine harvester, characterized in that the clutch is engaged when the reaping pretreatment device is lowered, and the clutch is disengaged when the reaping pretreatment device is raised above a certain height.