JPH0145329B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a reaping section that can be raised and lowered with respect to the machine and can be stopped at a specified cutting height position, and a reaping section that The present invention relates to a reaper including a designated mowing height setting change mechanism that can change the setting to a mowing height position.

[Conventional technology]

Conventionally, this type of reaping machine was simply equipped with a device for raising and lowering the reaping section and a clutch for intermittent power. When cutting in the ground, etc., at the start of cutting, the clutch in the transmission system to the cutting section is disengaged to stop the working drive of the cutting section, and the cutting section is moved to the required height position for cutting. After each operation is carried out to raise the mowing section to the original height, the turning operation is performed, and at the end of the turning operation, the clutch is engaged and the lowering operation is performed to return the reaping part to the original reaping height position. Each went separately.

[Problem that the invention seeks to solve]

For this reason, the entire operation during turning is complicated, and there is a risk that turning may become unsmooth due to delayed operation, or that forgetting to operate may cause contact with other objects or pull down of the stem culm.

The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to provide a reaper that can simplify the operations required when the reaper turns so as to avoid forgetting or delaying operations.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides a reaping machine in which a reaping section is connected to the machine so as to be able to be raised and lowered, and a clutch for intermittent power is provided in the middle of the transmission system to the reaping section. , a designated cutting height setting change mechanism is provided which is capable of freely stopping the reaping section at a cutting height position specified by the lifting/lowering operating tool, and which is capable of changing the setting of the specified cutting height position; A clutch operating tool that can be freely operated to engage and disengage the clutch and the specified cutting height setting change mechanism are linked to the disengaging operation of the clutch to drive and raise the reaping section by a substantially constant amount, and are also linked to the engaging operation of the clutch. and automatically return the reaping section to the specified cutting height position set by the specified cutting height setting change mechanism before the clutch is cut. It is a method that has been modified.

[Effect]

The functions and effects of the above characteristic configuration are as follows.

That is, the clutch operating tool and the specified cutting height setting change mechanism are connected via the automatic raising and returning mechanism.
Because they are linked together, when turning, you can simply release the clutch of the reaping section, which is an essential operation when turning, and this operation will move the reaping section to the appropriate height position for turning. In addition, by simply engaging the clutch after turning, the mowing section can be raised to the specified cutting height immediately before the clutch cut operation, which is set by the specified cutting height setting change mechanism. up to the height position,
It can be lowered automatically.

〔Effect of the invention〕

Therefore, compared to the conventional method in which clutch operation and reaping section raising/lowering operations were required separately, there is less risk of forgetting or forgetting to operate the clutch, and the overall turning operation can be simplified. When the specified cutting height setting change mechanism itself is operated to change the specified cutting height to Since it is possible to avoid the situation where the cutting height is different from the height, there is no need to take the trouble of setting the cutting height position again, the cutting work can be resumed smoothly, and work efficiency can be improved.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

To configure a combine harvester, which is an example of a reaping machine,
As shown in FIG. 1, a pulling device 3,
The reaping frame 7 of the reaping section B, which is equipped with a clipper-type reaping device 4 and a device 6 for conveying and supplying the harvested grain culm to the feed chain 5 of the threshing device 2, is connected to the reaping frame 7 so as to be movable up and down around the horizontal axis P. A hydraulic cylinder 9 is installed between the reaping frame 7 and the body frame 8 of the machine A to drive the reaping section B up and down with respect to the machine A.

Further, as shown in FIG. 2, a mechanism 12 is provided for linking the spool-type switching valve 10 of the hydraulic cylinder 9 and a lifting operation lever 11 as a lifting operation tool, and a linkage mechanism 12 is provided between the linking mechanism 12 and the reaping section B. Furthermore, a mechanical feedback mechanism 13 is provided which automatically returns the switching valve 10 to the vertical neutral state when the reaping section B reaches the designated cutting height position by the vertical operating lever 11.

In addition, a specified cutting height setting change mechanism 24 that can change the setting of the reaping section 13 to the cutting height position set by the lifting operation lever 11 is provided by the lifting operation lever 11, the linking mechanism 12, and the mechanical feedback mechanism 13. It is configured.

The linkage mechanism 12 is provided with an L-shaped swinging arm 14 that can forcibly switch the spool 10a of the switching valve 10 to a raised state U, a vertically neutral state N, and a lowered state D. It is constructed in such a manner that it is linked to the lift operation lever 11 via a rod 15.

The feedback mechanism 13 includes a feed link between the free end of the swing arm 14 and the other end of the feedback rod 17 which is pivotally connected to the transmission case 16 to the lifting device 3. A back link 18 is constructed, and this feedback link 18
A rod 15 on the side of the elevating/lowering operation lever 11 is pivotally connected to one end of a seesaw arm 19 pivotally connected in the middle.

When the elevating operation lever 11 is operated to the upward side, the seesaw arm 19 swings upward using the other end as a fulcrum, so that the feedback link 18 is also connected to the feedback rod 17 and the transmission case. 16 as a fulcrum, the swing arm 14 swings in the direction of arrow A, and the switching valve 10 changes from the vertical neutral state N to the vertical state U.
can be switched to

As the reaping section B rises, the feedback link 18 swings upward using the pivot connection section with the seesaw arm 19 as a fulcrum, and in conjunction with this,
When the swinging arm 14 swings in the direction of arrow B and the reaping part B rises to the mowing height position specified by the lift operation lever 11, the switching valve 10 automatically changes from the raised state U to the neutral state N. It can be switched accordingly.

In the case of lowering, the movement direction of each component is reversed, but the same operation is performed, and when the reaping section B is lowered to the specified cutting height position by the lifting operation lever 11, the switching valve 10 is moved from the lowering state D. It is automatically switched to the vertical neutral state N.

In such a cutting height control device, in the present invention, the lifting operation lever 11 is held at the operating position at the time of the clutch disengagement operation in conjunction with the disengagement operation of the clutch 20 interposed in the transmission system to the reaping section B. An automatic raising and returning mechanism 21 that drives and raises the reaping section B by a substantially constant amount while keeping the position in place, and automatically returns the reaping section B to the specified cutting height position by the elevating operation lever 11 in conjunction with the engagement operation of the clutch 20.
has been established.

This automatic raising and returning mechanism 21 includes an operating lever 22 as a clutch operating tool for the clutch 20.
and the other end of the seesaw arm 19 with the rod 2
It is constructed by being pivotally connected via 3.

Then, when the reaping clutch operating lever 22 is operated from the clutch engaged position (ON) to the clutch disengaged position (OFF), the seesaw arm 19 swings upward using the pivot connection with the lifting operating lever 11 as a fulcrum. The switching valve 10 is switched from the vertical neutral state N to the raised state U via the feedback link 18 and the swing arm 14.

When the reaping part B rises to a height corresponding to the operating amount of the reaping clutch operation lever 22, the switching valve 10 is moved from the raised state U via the feedback rod 17, the feedback link 18, and the swing arm 14. Automatically returns to vertical neutral state N.

When the reaping clutch operating lever 22 is operated from the clutch disengaged position (OFF) to the clutch engaged position (ON), the seesaw arm 19 swings downward about the pivot connection with the elevation operating lever 11 as a fulcrum, and the feed Back link 18 and swing arm 1
4, the switching valve 10 is switched from the vertically neutral state N to the descending state D. As the reaping section B descends, the feedback rod 17, the feedback link 18, and the swing arm 14 work, and the reaping section moves to the cutting height position immediately before the clutch cut operation specified by the lift operation lever 11. At the point when B is lowered, the switching valve 10 automatically returns from the lowered state D to the vertical neutral state N.

As another embodiment, the amount by which the seesaw arm 19 swings relative to the unit operation amount of the reaping clutch operating lever 22 may be adjusted to change the amount by which the reaping portion B rises.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

FIG. 1 is a side view of the front part of the combine, and FIG. 2 is a perspective view of the cutting height control device. A...This machine, B...Reaping section, 20...Clutch, 21...Automatic lift and return mechanism, 22...
Lifting operation tool, 24... Specified cutting height setting change mechanism.

Claims (1)

[Claims] 1 In a reaper in which a reaping section B is connected to the machine A so that it can be raised and lowered freely, and a clutch 20 for disconnecting power is provided in the middle of the transmission system to the reaping section B, the reaping section B can be raised and lowered. A specified cutting height setting change mechanism 24 is provided which can freely stop at a cutting height position specified by the operating tool 11 and change the setting of the specified cutting height position. The movable clutch operation tool 22 and the specified cutting height setting change mechanism 24 are operated in conjunction with the disengagement operation of the clutch 20 to drive and raise the reaping section B by a substantially constant amount, and the clutch 2
An automatic raising and returning mechanism 21 that automatically returns the reaping section B to the specified cutting height position set by the specified cutting height setting change mechanism 24 before the clutch 20 is disengaged in conjunction with the 0-turning operation. A reaping machine characterized in that the reaping machine is linked via the.