JPH04659Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a device lever device for a combine harvester, more specifically, a machine body having a threshing device, a cutting blade, a conveying device to the threshing device, and a raking drum. The present invention relates to an operating lever device for raising and lowering the reaping device and the rake reel in a combine harvester in which a reaping device is supported in a vertically movable manner and a raking reel is supported on the reaping device in a vertically movable manner.

(Prior Art) Conventionally, in a combine harvester in which the reaping device and the raking reel are each supported in a vertically movable manner,
a reaping lift lever that raises and lowers the reaping device;
Separate reel lift levers for lifting and lowering the scraping reel are provided, and these levers are arranged in parallel to a driving operation section provided mainly on the side of the driver's seat.In other words, the raising and lowering operation positions of each lever and These levers are arranged side by side so that their neutral positions are lined up on the side, and each of these levers is associated with a switching valve of a hydraulic circuit that operates the hydraulic lifting device of the reaping device and the raking reel. The spool of each switching valve is actuated by operating each lever, and is biased to a neutral position by a spring built into the switching valve, and when the lever is released, the spool returns to the neutral position. , the lever interlocked with the spool also returns to a neutral position.

(Problems to be Solved by the Invention) In the conventional operating lever device described above, there is no particular problem when the vertical positions of the reaping device and the raking reel are individually adjusted by the levers during normal reaping. However, when lowering the raking reel and raising the reaping device at the same time, the levers are biased to the neutral position and return to the neutral position when released, so it is difficult to use one-handed operation. It was difficult to operate and required operation with both hands.

That is, as described above, the levers are arranged side by side so that the raising operation position, lowering operation position, and neutral position of each lever are lined up side by side, so that the reel raising/lowering lever can be operated to the lowering operation position. Therefore, when operating the reaping lift lever to the raising operation position, the distance between each lever becomes wider, and maintaining each lever in each operation position for a certain period of time cannot be done with one hand, and it is necessary to grasp and operate each lever with both hands. It was hot.

Furthermore, when reaping work is performed using the above-mentioned combine harvester, the crops are continuously sent from the cutting blades to the raking drum in a push-like manner as the machine advances during the reaping work, so that some of the crops are transferred to the raking drum. However, at the end of mowing, the feed of the crop stops, so if a part of the crop comes into contact with the helical part of the raking drum, it will be repelled by the rotation of the raking drum, resulting in spillage from the culm. There was a problem that occurred.

An object of the present invention is to provide an operating lever device that can easily operate the raking reel and reaping device using a single operating mechanism, which can solve problems at the end of cutting.

(Means for solving the problem) The present invention uses a single operating mechanism to operate each lever that can solve the problem at the end of cutting by lowering the raking reel and raising the reaping device. A reaping lift lever 11 that is operable to raise and lower the reaping device 5;
and a reel raising/lowering lever 12 for raising and lowering the scraping reel 57.
12 so as to be independently operable, and an interlocking operation mechanism 20 that is interlocked with each of the levers 11 and 12 and simultaneously operates the reaping lift lever 11 to the upward operation position and the reel lift lever 12 to the downward operation position. It is characterized by the fact that it has been formed.

(Function) The reaping lift lever 11 and the reel lift lever 12 can be used to raise and lower the reaping device 5 and the raking reel 57 separately, and the operation mechanism 20 can be operated to raise and lower the reaping. The lever 11 can be operated at the same time as the raising operation position and the reel raising/lowering lever 12 can be operated at the lowering operation position, and by this operation, the above-mentioned problem with the combine harvester at the end of cutting can be solved.

That is, at the end of mowing, the levers 11 and 12 are simultaneously operated to the respective positions by the single operating mechanism 20, and the raking reel 57 is lowered to change the contact position of the horizontal bar against the crop from the ear side to the plant base. Since the crop can be moved to the side and fed into the raking drum by contact with the horizontal bar at the stock base side, it is possible to reduce the amount of crops being repelled by the raking drum, and the reaping device 5 can be raised. As a result, the guide surface (platform) from the cutting blade 53 to the raking drum 54 is sloped so that the rear side is downward.
It is easy to incorporate into 4, and
Both of these effects can reduce culm spillage at the end of mowing.

(Example) The operating lever device of the present invention is applied to the combine harvester shown in FIGS. 3 and 4, and first, this combine harvester will be explained.

This combine is a general-purpose type, with crawler 2
A threshing device 3 and a swinging sorting device 4 have a screw-type handling barrel 3a on a traveling machine body 1 which is configured to travel by
A reaping device 5 is supported in front of the machine body 1 so as to be able to rise and fall vertically via a hydraulic lifting device 6, while a device on the side of the threshing device 3 is provided with a device for storing grains threshed by the threshing device 3. A grain storage tank 7 is provided, a driver's seat 8 and a driving operation section 9 are provided in front of the tank 7, and an engine 10 is mounted behind the tank 7.

The reaping device 5 includes a platform 52 having a header 51 for receiving uncut crops, a reciprocating cutting blade 53 attached to the front of the platform 52, and a crop disposed behind the cutting blade 53. It consists of a conveyor 55 having a raking drum 54 and a conveyor 56 which is connected to the rear of the platform 52 and conveys the crops cut by the cutting blades 53 to the threshing device 3. A scraping reel 57 is supported via a hydraulic lifting device 58 so that it can move up and down.

The operating lever device of the present invention operates the reaping device 5 and the scraping reel 57 up and down, and as shown in FIGS. Including reel 57
A reel lifting lever 12 for lifting and lowering the reel is installed so that it can be operated independently, and each of the levers 1
1 and 12, and is provided with an interlocking operation mechanism 20 that simultaneously operates the reaping lift lever 11 to the upward operation position and the reel lift lever 12 to the downward operation position.

That is, the operating lever device shown in FIGS. 1 and 2 has guide grooves 13,
14 are arranged in parallel to the operation part 9, and each guide groove 1
The levers 11 and 12 are arranged in parallel on the levers 3 and 14, and the guide grooves 13 and 14 are made to be out of order in the front and back direction, so that the raising operation position U ₁ of the reaping lift lever 11 and the lowering operation of the reel lift lever 12 are adjusted. position
D ₁ are placed at the same position in the front and back direction, and each lever 11, 12 is provided with a hydraulic lifting device 6, 58 for the reaping device 5 and the raking reel 57, respectively.
The switching valves (not shown) of the hydraulic circuit that operate the switching valves are configured so that the spools (not shown) of the switching valves are operated by operating the levers 11 and 12, and the switching valves When the levers 11 and 12 are released, the spools return to the neutral positions N ₁ and N ₂ , and each of the spools interlocked with the spools is biased toward the neutral position by a built-in spring (not shown). The levers 11 and 12 are also adapted to return to their neutral positions.

Further, the interlocking operation mechanism 20 includes, on the side of the reaping lift lever 11, an inverted L-shaped first operating rod 21 that is movable in the same direction as the length direction of the guide groove 13 of the lever 11, and the reel lift lever. On the side, an L-shaped second operating rod 23 is rotatably supported by a support shaft 22 fixed to the driving operation section 9. At one end of the first operation rod 21, the driving operation section 9 A guide rod 24 is provided which is slidably and loosely fitted into the guide groove 15 arranged in parallel to the outside of the guide groove 13, and the intermediate part of the first operating rod 21 is engaged with the reaping lifting lever 11. The recess 21a is provided. and,
The other end of the first operating rod 21 is provided with an operating lever 25 for sliding the first operating rod 21 along the guide groove 15. Further, one end of the second operating rod 23 has a recess 23a that engages with the reel lift lever 12, and the other end has a contact part 2 that abuts one side of the operating lever 25.
3b is provided. The first operating rod 21 configured as described above is attached to the end of the guide rod 24 side on the outer side of the lowering operation position D ₁ of the reaping lift lever 11. A first spring 26 is provided to bias the second spring 26.
The second operating rod 23 is connected to the reel lift lever 1 at the end of the operating rod 23 on the recess 23a side.
A second spring 27 is provided that biases the second operating rod 23 outward from the lifting operation position U ₂ of the second operating lever 23 .
The contact portion 23b is configured to come into elastic contact with the side portion of the operating lever 25.

When reaping work is performed in the combine harvester, the reaping device 5 is raised and lowered by the reaping lift lever 11 to adjust the desired cutting height, and the reaping reel 5 is raised and lowered by the reel lift lever 12.
7 to raise and lower the horizontal bar 5 of the scraping reel 57.
7a is adjusted so that it passes above the cutting blade 53 and at or slightly above the middle between the cutting blade 53 and the tip of the crop.

When the reaping work adjusted as described above is completed, that is, at the end of mowing, the first operating rod 21 is moved along the guide groove 15 by operating the operating lever 25 in the direction of the arrow in FIG. and slides toward the reaping lift lever 11 side, and the first operating rod 21
At the same time when the recess 21a of the lever 11 is engaged with the lever 11 and the lever 11 is operated to the raising operation position _U1 ,
As the first operating rod 21 slides, the second operating rod 23 also rotates about the pivot shaft 22 toward the reel lifting lever 12, and the recess 23a of the operating rod 23 and the lever 12 are aligned. When engaged, the lever 12 is operated to the lowering operation position _D2 , and this operation lowers the raking reel 57 and simultaneously raises the reaping device 5.

Generally, during reaping work, the harvested crops are continuously fed to the raking drum 54 as the machine body 1 moves, so the crops do not spill from the raking drum 54. Since there is no more crop to be sent in, a part of the final crop comes into contact with the raking drum 54 and is repelled, causing a spillage phenomenon without being taken into the raking drum 54. However, at the end of the cutting, the reaping device 5 is raised at the same time as the reel 57 is lowered, thereby making it possible to prevent the above-mentioned spillage phenomenon.

First, when the reel 57 is lowered, the position of the horizontal bar 57a that comes into contact with the crop shifts to the plant base side, so that the scraping action by the reel 57 can be applied to the plant base side. This makes it possible to reduce the amount of water escaping from the scraping drum 54.

Furthermore, by raising the reaping device 5, the platform 52 can be tilted so that the rear side is downward, so that the harvesting into the raking drum 54 can be facilitated.

Therefore, both of these can prevent the crop from spilling at the end of cutting, and the operation of each of the levers 11 and 12 is performed by raising the reaping lift lever 11 by operating the single operating lever 25 as described above. The reel lift lever 12 is moved to the operating position U ₁ .
can be operated to the lowering operation position _D2 at the same time, so even one-handed operation can be easily performed without any erroneous operation.

In the previously described embodiment, the interlocking operation mechanism 20 is disposed on the upper surface side of the driving operation section 9 as shown in FIG. 4, so that it can be directly attached to the existing operation lever device from the outside. Other interlocking operation mechanism 2
0 may be arranged on the inner surface side of the driving operation section 9. In such a case, a guide groove (not shown) for the operation lever 25 is provided outside the guide groove 14 in the driving operation section 9, and the operation lever 25 is inserted from the guide groove.
This is done so that it protrudes outward.

(Effects of the invention) As described above, the present invention includes the reaping lift lever 11 for raising and lowering the reaping device 5, and the raking reel 5.
A reel lifting lever 12 for lifting and lowering the reel 7 is provided, and each of these levers 11 and 12 is attached to be operable independently, and the reaping lifting lever 11 is moved to a lifting operation position in conjunction with each of the levers 11 and 12. , since it is characterized by forming an interlocking operation mechanism 20 that simultaneously operates the reel lift lever 12 to the lowering operation position, the reaping lift lever 11 and the reel lift lever 12 can be operated by one interlock operation mechanism 20. By simultaneous operation, the raking reel 57 can be lowered and the reaping device 5 can be raised simultaneously without any erroneous operation, and this operation can reliably prevent the spillage of crops at the end of cutting. It is.

That is, by lowering the raking reel 57 at the end of mowing, the harvested crop can be moved from the normal raking position to the plant base side, that is, to the cutting side, and is prevented from being repelled from the raking drum 57. In addition, the reaping device 5 can be raised at the same time as the reel 57 is lowered, and this raising makes it easier to take the crop into the raking drum 54. This prevents it from being drawn into the drum and prevents it from spilling.

Moreover, in the operating lever device of the present invention, the interlocking operating mechanism 20 can be retrofitted into the operating lever device without changing the structure of the existing operating lever device, which consists of a reaping lift lever and a reel lifting lever. Therefore, it can be provided at low cost.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing an embodiment of the operating lever device of the present invention, FIG. 2 is a partially enlarged side view of the same essential parts,
FIG. 3 is a side view of a combine harvester to which the operating lever device of the present invention is applied, and FIG. 4 is a plan view thereof. DESCRIPTION OF SYMBOLS 1... Machine body, 3... Threshing device, 5... Reaping device, 53... Cutting blade, 54... Raking drum, 55...
... Conveyance device, 57 ... Scraping reel, 11 ... Reaping lift lever, 12 ... Reel lift lever, 20 ...
...Interlocking operation mechanism.

Claims (1)

[Scope of utility model registration request] A machine body 1 having a threshing device 3 includes a cutting blade 53, a conveying device 55 to the threshing device 3, and a raking drum 54.
This is an operating lever device for a combine in which a reaping device 5 having a reaping device 5 is supported in a vertically movable manner, and a raking reel 57 is supported on the reaping device 5 in a vertically movable manner. A lever 11 and a reel raising/lowering lever 12 for raising and lowering the raking reel 57 are provided, and each of these levers 11 and 12 is attached to be operable independently, and is linked to each of the levers 11 and 12 to raise and lower the reaping reel 57. An operating lever device for a combine harvester, characterized in that an interlocking operation mechanism 20 is formed that simultaneously operates the elevating lever 11 to a rising operating position and the reel elevating lever 12 to a descending operating position.