JPH0119649Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotation fulcrum support structure for a reaping rotary type combine among combine harvesters.

A combine harvester rotates the reaping section or rotates the reaping section and the threshing device integrally when it is mounted on a transport vehicle or when going over ridges.

The present invention relates to a support structure for a rotation fulcrum of a rotary reaping combine harvester.

In conventional reaping rotary combine harvesters, the rotary fulcrum shaft is located near the reaping drive case, which serves as a relay base for transmitting power from the engine to the reaping section. Therefore, the rigidity of the reaping drive case,
Since power transmission shafts protrude from the reaping drive case to each device in the reaping section, the power transmission shafts and transmission shaft cases protrude radially from the rotation fulcrum shaft as a whole, making the rotation fulcrum shaft strong. It was supported.

However, in this invention, in order to reasonably widen the rotation range, and in order not to change the interval of the transfer section from the vertical conveyance device to the feed chain even if the reaping section is rotated, the rotation fulcrum shaft is driven for reaping. This refers to items placed upward away from the case. At that time, the reaping drive case should also be moved upward and placed at the same position as the rotation fulcrum shaft, but when the power transmission shafts to each device are radially extended from the reaping drive case, the case should be placed in a lower position. It is better to have it in .

The present invention relates to a support structure for compensating for the lack of strength around the rotation fulcrum shaft when the rotation fulcrum shaft is placed above and away from the reaping drive case. The outer cylinder of the upper conveyance shaft protruding toward the rear is connected to the rotation fulcrum shaft, and furthermore, the reaping support pipe protruding rearward from the reaping frame portion is connected to the rotation fulcrum shaft.

The purpose of the present invention is as described above, and the structure of the present invention will be explained based on the structure of the embodiment shown in the attached drawings.

FIG. 1 is an overall side view of the combine harvester.

Threshing device 10 on crawler-type traveling device 13
The engine 12 is mounted and fixed, and the lifting device 2, the reaping device 20, each conveying device, etc. are pivoted in front of the threshing device 10 so as to be vertically movable. It is configured to move up and down around the center.

A weed cutting plate 1 is projected from the tip of the machine, and the roots of grain culms in a standing state are separated from the grass in the field and guided to a pulling device 2.

While pulling up the inverted grain culm with the lifting device 2, the plant base is pulled up with a projection belt 3 and a star wheel 4.
It is raked in by the raking device 20 and harvested by the reaping device 20. The harvested stock head is conveyed by the left and right stock head conveying devices 7, 15, and after merging, it is conveyed along the rear side 7a of the left side stock head conveying device 7, and then transferred to the vertical conveyance device 8. After the stock head is rapidly lifted by the vertical conveyance device 8, it is transferred to the feed chain 9 of the threshing device 10. On the other hand, the tip part is moved from the lifting device 2 to the left and right upper conveying devices 5,
6, and after joining the upper conveyance device 6 on the left midway, it is further conveyed and placed on the entrance iron plate 11 of the threshing device 10. Then, the stock part is held by the feed chain 9 and is threshed by the handling cylinder 10a while passing through the threshing device 10.

FIG. 2 is a plan view showing the reaping device of the present invention.
In this embodiment, an example of a three-row mowing combine is shown, and there is also a raking device 3a in which three pulling devices 2a, 2b, and 2c are provided, and a raking belt 3 with protrusions and a star wheel 4 are integrated. ,4a,
Three sets are provided: 3b, 4b, 3c, and 4c.
Two rows of grain culms are processed between the raising devices 2b and 2c, and one row of grain culms is processed by the raising device 2a.
Similarly, two rows of grain stalks are scraped between the star wheels 4b and 4c, and one row of grain stalk stalks is scraped between the star wheel 4a and the guide rod.

The stocks for the two rows on the left are conveyed by the stocks conveyor 7, and the stocks for one row on the right are conveyed by the right stocks conveyor 15. The stock head conveying device 15 on the right does not overlap the right upper conveying device 6 in plan view, and the stock head conveying device 15 tends to open slightly to the right. Also, at the junction of the stock head conveyors 7 and 15, the right stock head conveyor is shifted to the left from the right upper conveyor. This staggered arrangement widens the range of action of the raking device, and also makes it possible to gradually tilt the grain culm during transport before it is transferred to the vertical transport device.

FIG. 3 is a diagram showing the power transmission system. The power source is an engine 12, and the engine 12 includes:
A pulley 27 is provided, and the traveling device and the reaping conveyance device are driven by the pulley 27. pulley 27
is wound around the pulley 26a of the traveling counter shaft 26, and then the pulley 26a of the traveling counter shaft 26
The pulley 24b of the mission input shaft 24 is driven from the belt tension clutch 25 by the belt tension clutch 25. As a result, the transmission 21 is driven, and the pulley 24a drives the pulley 23b on the reaping counter shaft 23 near the pivot shaft.
The pulley 23a at the other end of the reaping counter shaft 23 is configured as a variable speed split pulley, and a reaping variable speed belt 16d is wound between it and the variable speed split pulley 16 of the reaping drive case 17.
By rotating the cam lever 3a, the pitch diameter of the split pulley can be changed and the speed of the entire reaping and conveying device can be changed. The variable speed split pulley 16 supports the reaping 1 which is supported on the protrusion of the reaping drive case 17.
Drive shaft 44. Reaping 2 with gears from reaping shaft 1
Further, power is transmitted from the second reaping shaft 28 to the third reaping shaft 35.

A reaping clutch device 28a is provided on the two reaping shafts 28. The three reaping axes are reaping drive case 17
It is located inside and has three bevel gear devices protruding left and right. A bevel gear device 36 for driving the drive sprocket 8a of the vertical conveyance device 8 is provided on the left side protrusion of the reaping drive case 17, and drives the vertical conveyance drive sprocket 8a via a bevel gear device 37 for direction change provided midway. do.

A bevel gear device 35 for driving the four reaping shafts 29 protruding forward and an upper conveyance device 6 on the right side are attached to the protruding portion of the three reaping shafts 35 on the right side of the reaping drive case 17.
A bevel gear device 34 is provided for driving the. The drive sprocket 6a of the upper conveyance device 6 on the right side of the bevel gear device 34 is driven.

Further, a crankshaft is provided on the protrusion 17b of the reaping drive case 17, and the reaping device 20 is driven via a bell crank 19 by moving the connecting rod 18 back and forth.
A case 29a is fitted over the four reaping shafts 29, and the five reaping shafts 42 are driven by a bevel gear device 33 at the end thereof. The five reaping shafts 42 are also provided with three sets of bevel gear devices 30, 31, 32, and the pulling devices 2a, 2 are connected to the left end bevel gear device 30.
b, 2c are driven via bevel gear devices 38, 39, 40.

In the bevel gear device 31 on the right side, the driving sprocket 7a of the stock base conveying device 7 on the left side and the driving sprocket 5a of the upper conveying device 5 on the left side are arranged in a skewer shape and are driven simultaneously. Conventionally, a shaft protruding from a bevel gear device 32 was used to transport the stock base conveying device 15 on the right side.
The driving sprocket 15a of the upper conveying device on the right side and the driving sprocket of the upper conveying device on the right side were driven, but in the present invention, the upper conveying device on the right side is driven by the three reaping shafts 35.

Further, the gripping chain of the left-hand stock transfer device 7 drives the shaft of the star wheel 4c, and at the same time drives the protruded scraping belt 3c. Since the star wheel 4c and the star wheel 4b are meshed with each other, the star wheel 4b rotates, and the protruded scraping belt 3b is also driven because it is wound on the same axis. Also, stock transfer device 1 on the right side
The star wheel 4a is driven by the pinching chain 5, and the protruded scraping belt 3a is also driven in the same way.

The main parts of the present invention will be explained in the support drive system of the reaping and conveying device as described above.

Figure 4 shows the rotation fulcrum shaft 22, which is the main part of the present invention.
An enlarged view of the vicinity, FIG. 5, is a drawing showing a state in which the reaping section is rotated around the rotation fulcrum shaft 22.

In the embodiment shown in FIGS. 4 and 5, the rotation fulcrum shaft 22 is a cylindrical shaft, and a reaping counter shaft 23 is provided therein. It is desirable that the reaping counter shaft 23 be as close to the rotation fulcrum shaft 22 as possible, and if they are on the same axis, the split pulley 16 of the reaping drive case and the split pulley of the reaping counter shaft will rotate as the reaping section rotates. It is the best because the distance to 23a does not change.

A bevel gear device 34 for driving the upper conveyance device 6 is provided at a portion where the three reaping shafts 35 of the reaping drive case 17 protrude to the right.
1a protrudes and transmits power to the upper conveyance device 6.

The outer cylinder 41 of the upper transport drive shaft 41a passes near the rotation fulcrum shaft 22 and is fixedly supported by the rotation fulcrum shaft 22 via a fixed body 42.

The fixed part of the upper conveyance drive shaft 41a with the outer cylinder 41 is approximately at the center of the rotation fulcrum shaft 22 as shown in FIG. I support it.

The reaping support pipe 43 is connected to the reaping frame 50 of the five reaping shafts 42 extending from the reaping drive case 17.
The bevel gear device 30 protrudes upward from the bevel gear box 30a of the left end bevel gear device 30 near the base 50a, is bent rearward, and is fixed to the rotation fulcrum shaft 22.

By providing two support rods in this way, the rotation fulcrum shaft 2
2 is located away from the reaping drive case 17, which makes the support portion weaker.

As described above, in the present invention, in the reaping rotation type combine harvester, the rotation fulcrum shaft 22 is connected to the reaping drive case 1.
The outer cylinder 41 of the upper conveyance drive shaft 41a, which is provided above the reaping drive case 17 and protrudes upward from the reaping drive case 17, is connected to the rotation fulcrum shaft 22, and furthermore, the reaping support pipe 43 that protrudes rearward from the reaping frame 50 is connected. Since it is connected to the rotational fulcrum shaft 22, the rotational fulcrum shaft for reaping rotation can be placed above a position away from the reaping drive case 17, and the rotation of the reaping section can be increased. Since the fulcrum shaft and the rear end position of the vertical conveyance device 8 are close, the interval between the vertical conveyance device and the feed chain joint does not change much due to the reaping rotation.
This prevents culm leakage and poor connection, and the upper rotational fulcrum shaft is firmly supported by the outer cylinder of the upper transport drive shaft and the reaping support pipe, just like in the past when the pivot point was near the reaping drive case. It is possible.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of the combine harvester, Fig. 2 is a plan view showing the proposed reaping device, Fig. 3 is a line diagram showing the power system, Fig. 4 is an enlarged view of the vicinity of the rotation fulcrum shaft, Fig. 5 2 is a drawing showing a state in which the reaping section is rotated around the rotation fulcrum axis. 17...Reaping drive case, 22...Rotation fulcrum shaft, 41...Upper conveyance drive shaft outer cylinder, 41a...Upper conveyance drive shaft, 43...Reaping support pipe, 50...
...Reaping frame.

Claims (1)

[Scope of utility model registration request] In a reaping rotation type combine harvester, a rotation fulcrum shaft is provided above the reaping drive case, and an outer cylinder of an upper conveyance drive shaft that protrudes upward from the reaping drive case is connected to the rotation fulcrum shaft. A rotating fulcrum support structure for a combine harvester, characterized in that a reaping support pipe protruding rearward is connected to a rotating fulcrum shaft.