JPS6219149Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a length adjustment device for a combine harvester.

In combine harvesters, in order to maintain a constant handling depth even when grain culms vary in length, the angle of inclination of the grain conveying mechanism for transporting the harvested grain culms to the feed chain of the threshing device is It is well known that the handling depth is adjusted to be approximately constant by increasing or decreasing the grain culm using a length/short culm adjustment lever installed in the operating section of the combine, and by adjusting the gripping position of the grain culm. That's right.

However, even if the length of the grain culm is constant, the handling depth changes when the traveling speed of the combine changes. No. 50-107630), the specification and drawings were photographed using microfilm.

That is, as shown in FIG. 5, when the combine harvester is running at low speed, the tips of the grain culms A planted in the field are raked up by the tines b of the grain culm lifting mechanism B, and After being harvested by the grain culm C, the grain culm is transferred to the subsequent grain culm transport mechanism D in almost the same posture as when it was planted, and the grain culm transport mechanism D
The grains are conveyed from the stock head section while being held in a position of dimension l1, and then transferred to feed chain E in the threshing section.

However, since the lifting speed of the hoisting tine b in the grain culm pulling mechanism B is always constant regardless of the traveling speed of the combine harvester, the lifting function of the hoisting tine b becomes relatively As a result, the grain culm A assumes a more forward-leaning posture than when running at low speed. and,
When the grain culm A leans forward, the lifting tine b, which should normally raise the tip of the grain, acts to flip the stock base of the grain culm A backward, and the grain culm A after reaping is shown by the dashed line. As a result, the grain culm A is transferred to the grain conveying mechanism D in a state in which the stock part jumps up backwards. Therefore, at high speed, l1 is held more than at low speed.
(In particular, when a raking device F is provided at the lower part of the pre-harvesting processing section, the raking device prevents the stock base of the grain culm A from springing backward. ).

To address this problem, the prior art proposes changing the inclination angle of the grain culm pulling mechanism according to the traveling speed of the combine, and maintaining a constant pulling angle of the grain culm by the grain culm pulling mechanism. However, with this method, the grain culm pulling mechanism must be configured to be tiltable, and a means for adjusting the inclination of the grain culm pulling mechanism must be provided separately, which makes the structure of the combine extremely complicated. There is a problem.

The object of the present invention is to use an extremely simple device to correct the problem that the handling depth changes as the speed of the combine harvester changes.

Therefore, in the present invention, a grain culm pulling mechanism is installed in an inclined manner between a reaping pretreatment section having a tiller, a grain culm pulling mechanism, and a reaping mechanism, and a feed chain in a threshing section, and the grain culm conveying mechanism A long and short culm adjustment device for a combine, comprising a long and short culm adjustment lever for increasing and decreasing the inclination angle of the combine, and a culm length scale plate for the long and short culm adjustment lever,
The culm length scale plate is configured to be movable and adjustable in the same direction as the moving direction of the long/short culm adjustment lever in response to changes in the traveling speed of the combine harvester.

The embodiments of the present invention will be explained based on the drawings when applied to a walking type combine harvester. Reference numeral 1 denotes the body of the walking type combine harvester supported by a pair of traveling crawlers 2, 2, and the upper surface thereof A threshing section 3 with a feed chain 4 is provided on the left side of the machine, and an engine 5, a threshing removal section 6, and an operation column 7 are provided on the left side.

Reference numeral 8 denotes a pre-reaping treatment section which is provided at the front part of the machine body 1 so as to be able to be raised and lowered via a hydraulic cylinder 9. , grain raking wheels 12, 12
and a reaping mechanism 13.

Reference numeral 14 denotes a grain culm conveying mechanism installed in an inclined manner between the grain culms to convey the grain culms harvested in the pre-harvesting treatment section 8 to the feed chain 4 in the threshing section 3, and the upper end of the grain culm conveying mechanism 14 is pivotally supported at the lower part of the starting end of the feed chain 4, and its lower end is suspended via a rod 16 from the tip of a bell crank lever 15 pivoted to the fuselage 1 side, and is rotated by rotation of the bell crank lever 15. It is configured so that the angle of inclination can be increased or decreased.

Furthermore, a long and short culm adjustment lever 17 is provided on the side surface of the operation column 7 so as to be rotatable along the direction of movement of the combine, and the long and short culm adjustment lever 17 and the bell crank lever 15 are connected to each other. 1
7', the grain culm conveyance mechanism 14 can be adjusted by rotating the long/short culm adjustment lever 17 in the forward direction.
The lower end of the grain culm conveying mechanism 14 is configured to be lowered, and when the long and short culm adjustment lever 17 is rotated in the rear direction, the lower end of the grain culm conveyance mechanism 14 is raised.

The guide groove 19 in the guide plate 18 that guides the long and short culm adjustment lever 17 on the side surface of the operation column 7 is provided with a plurality of incision grooves 20 for locking the long and short culm adjustment lever 17 at any adjustment position. On the other hand, on the upper surface of the guide plate 18,
When installing the culm length scale plate 21 that displays the length of the grain culm, the culm length scale plate 21 is configured to be movable and adjustable by an adjustment screw 22 along the rotational direction of the long/short culm adjustment lever 17. It consists of

In this configuration, the grain culm harvested by the reaping pretreatment section 8 as the combine moves forward is transferred to the grain culm conveying mechanism 14, sent to the feed chain 4, and threshed, but the length of the grain culm is When the standard grain length is 90 cm, the appropriate handling depth can be adjusted by positioning the long/short culm adjustment lever 17 at the 90 cm position on the culm length scale plate 21. However, when the grain culm length is as short as 60 cm, Rotate the long/short culm adjustment lever 17 to position it at 60 cm on the culm length scale plate 21, and lower the lower end of the grain culm conveying mechanism 14 to clamp the base of the grain culm, thereby adjusting the culm length to 90 cm. If the grain culm can be threshed at the same handling depth and the length of the grain culm is as long as 120 cm, the long/short culm adjustment lever 17 is positioned at 120 cm on the culm length scale plate 21, and the grain culm conveying mechanism 14 is able to thresh the grain. By moving the clamping position to the tip side, the grain will be threshed at the same handling depth.

However, since the lifting speed of the lifting tines in the grain culm pulling mechanism 11 is constant, when the traveling speed of the combine is increased, the lifting speed of the grain culm relatively decreases, and the grain culm to be reaped is moved earlier than before the speed change. Becomes a leaning position. Therefore, the lifting tines in the grain culm lifting mechanism 11 act to flip up the stock base of the grain culm rearward, and the raking wheel 1
The second function is relatively strengthened and acts to flip the stock base of the grain culm backwards after reaping.
When the harvested grain culm is held by the grain culm transport mechanism 14, the part of the grain culm that is closer to the base of the stock is held than at low speeds, and therefore, even though the length of the grain culm is constant, Regardless, it tends to be handled more deeply than at low speeds. On the other hand, when the combine is downshifted from high speed to low speed, the opposite phenomenon occurs.
Although the grain culms are the same length, they tend to be treated shallowly.

In contrast, the present invention is configured so that the culm length scale plate 21 for displaying the operating position of the long and short culm adjustment lever 17 can be moved and adjusted in the same direction as the movement direction of the long and short culm adjustment lever 17. When reaping with the combine harvester in 1st gear forward, by setting the scale 21' of the culm length scale plate 21 to the 1st gear position, you can thresh at the handling depth corresponding to the 1st gear, while at the same time When performing reaping work in 2nd speed forward mode, loosen the adjusting screw 22 of the culm length scale plate 21, set the scale 21' to the 2nd speed position, and set each culm length display position on the culm length scale plate 21 in the direction of shallower depth. By moving to
When reaping work is carried out at high speed, by moving the culm length scale plate 21 and setting the scale 21' to the 3rd speed position, it is corrected that the cutting becomes deeper as the traveling speed increases. .

As described above, the present invention makes it possible to accurately correct changes in handling depth due to changes in the running speed of the combine harvester by moving and adjusting the culm length scale plate relative to the long/short culm adjustment lever in the long/short culm adjustment device. Although it has an extremely simple structure, it has the effect of maintaining a proper handling depth at any traveling speed.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of the combine harvester, Fig. 2 is a plan view, Fig. 3 is a sectional view of the long and short culm adjustment operation part, Fig. 4 is a plan view of Fig. 3,
FIG. 5 is a diagram showing the relationship between the traveling speed of the combine harvester and the conveying posture of grain culms. 1... Machine body, 3... Threshing section, 4... Feed chain, 8... Pre-reaping processing section, 10... Grazing body,
11... Grain culm lifting mechanism, 14... Grain culm conveying mechanism,
17... Long/short culm adjustment lever, 18... Guide plate,
21……Culm length scale plate.

Claims (1)

[Scope of utility model registration request] A grain culm conveyance mechanism is installed in an inclined manner between a cutting pre-treatment section having a cutting body, a grain culm pulling mechanism, and a reaping mechanism, and a feed chain in the threshing section, and the inclination angle of the grain culm conveyance mechanism is adjusted to increase or decrease. In a combine length/short culm adjustment device comprising a long/short culm adjustment lever and a culm length scale plate for the long/short culm adjustment lever, the culm length scale plate is
1. A length/short culm adjustment device for a combine, characterized in that the length/short culm adjustment device is configured to be able to adjust the movement in the same direction as the moving direction of the length/short culm adjustment lever in accordance with a change in the running speed of the combine.