JPH0265727A - Conveying device of grain culm in combine - Google Patents

Abstract

PURPOSE:To prevent generation of drafting of grain culm, disturbing of conveying attitude of reaped grain culm or breaking of culm, etc., making a special relation between conveying speed of reaped grain culm to threshing part and transferring speed of feed chain of threshing part according to car speed of combine. CONSTITUTION:Transferring speed (b) of feed chain is set to lower than reaping and conveying speed (a) for below a constant car speed (v) and transferring speed (b) of the feed chain is set to higher than reaping and conveying speed (a) for above a constant car speed. By said method, in a harvesting with low speed at the beginning of work, etc., reaping and conveying speed is also set to low speed coincident with said speed, thus drafting of grain culm before cutting is prevented and simultaneously generation of disturbing in conveying attitude of reaped grain culm is prevented, further, breaking of culm before threshing is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a grain culm conveying device for a combine harvester that changes the reaping conveyance speed of the reaping section and the conveyance speed of the feed chain of the threshing section according to the vehicle speed of the machine body. .

``Prior Art'' Generally, the reaping conveyance speed and the feed chain conveyance speed are arranged so as to always maintain a substantially constant relationship and synchronize with the vehicle speed.

``Problems to be solved by the invention'' However, if the reaping conveyance speed is higher than necessary during low-speed harvesting such as at the start of work, the grain culm may be pulled out before cutting with the cutting blade, or the conveying posture of the reaped grain culm may change. In addition, in the case of a feed chain, if the conveyance speed is lower than necessary, the residence time of the grain culm in the threshing section becomes longer, which increases the chance of cutting of the grain by the handling cylinder and generation of straw waste. There were drawbacks.

On the other hand, during normal high-speed harvesting work, if the conveyance speed of the feed chain is set higher than the reaping conveyance speed, when the tip side of the grain culm is inserted into the threshing section due to the clamping conveyance of the feed chain, the tip side will be in a delayed position. In addition, there was a drawback in that the resistance in the handling cylinder further exacerbated the delay, making it difficult to perform proper threshing work.

``Means for Solving the Problems'' Therefore, the present invention provides a structure in which the reaping conveyance speed and the feed chain conveyance speed are changed according to the vehicle speed. The conveyance speed of the feed chain is set to be low, and the conveyance speed of the feed chain is made higher than the reaping conveyance speed when the vehicle speed is above a certain level (14).

``Function'' According to the present invention, the reaping conveyance speed during low-speed harvesting, such as at the start of work, is also made low in synchrony with this speed, so that it is possible to pull out the grain culm before cutting and change the conveyance posture of the reaped grain culm. In addition to preventing turbulence, the feed chain ensures the required minimum conveyance speed to ensure good threshing without the occurrence of culm breakage, and on the other hand, during normal high-speed harvesting operations, the reaping conveyance speed By lowering the conveyance speed of the feed chain, the use side of the grain is not put in a delayed position (it is inserted into the threshing section in the proper position and at the proper handling depth to improve the workability of this threshing work). The aim is to

``Example'' An example of the present invention will be described in detail below based on the drawings. 1st
The figure is an explanatory side view of the feed chain transmission section, Figure 2 is an overall side view of the combine harvester, and Figure 3 is a plan view of the same.
il is a truck frame on which the running roller (2) is installed, (3) is a machine base installed on the truck frame fil, and (4) is a handling cylinder (6) with a feed chain (5) stretched on the left side. and a threshing unit incorporating a processing cylinder (7), (
8) is a reaping section equipped with a cutting blade and a grain culm conveying mechanism;
) is the straw discharging chamber (101 (the straw discharging section facing the end of the ill), (12) is the driver's seat (I3) and the driving operation section (14)
), (15) is an engine section located at the rear right side of the machine platform (3) and has an engine (16) installed therein;
7) is disposed in front of the engine part (15) and has a threshing part (
A grain tank (19) is an upper discharge auger that takes out grains from the grain tank (1) to the outside, and a grain tank (19) is used to collect grains from the grain tank (4) through a lifting cylinder (18). It is configured to perform threshing work.

As shown in FIGS. 4 to 6, the reaping section (8) has a 5-row raising case (21) for raising up the uncut grain culms that are taken in through the dividing plate (20). 2
2), a star foil (23) and a scraping belt (24) that scrape the culm side and the tip side of the raised grain culm, and a cutting blade (25) that cuts the culm side during this scraping. , a right culm conveying chain (26) that conveys the culm side of the two right-hand grain culms diagonally backward to the left after cutting, and a feed chain (26) that conveys the tip side of the two right-hand grain culms diagonally to the rear left. 5) is directed toward the feeding start end by the right culm conveying tine (27) that conveys the culm and the rear right culm conveying chain (26) which conveys the culm side and the ear side of 3 and 4 grain culms from the right side. The central culm conveying chino (28) and the central ear conveying tine (29) are merged near the feed end position.
and a left culm root conveying chain (30) and a left ear tip conveying tine (31) that merge the culm side and the ear side of one grain culm on the left side near the feed end position of the right culm conveying chain (26). ,
5 that joins the feed end of the right culm origin conveyance chain (26)
A vertical conveyance chain (32) that conveys and transfers the culm side of the grain culm of the row to the feed start end of the feed chain (5), the right ear tip conveyance tine (27), and the feed end of the vertical conveyance chain (32). The feed chain (5
) to inherit the grain culm in the proper posture (3)
3), and the five rows of harvested grain culms are transferred to the feed chain (5) via these Y-shaped conveyance paths (34) for threshing processing.

In addition, a reaping main frame (38), which is a reaping transmission case, is attached to a pedestal (36) which is erected and fixed to the front end of the machine stand (3) via a support (35), via a vertical movement fulcrum shaft (37). In addition to supporting the base end, a reaping lifting cylinder (39) is interposed between the main frame (38) and the truck frame fi1, and the reaping part (8) is moved by the expansion and contraction movement of the cylinder (39).
The structure is such that it can be raised and lowered as appropriate.

A reaping input shaft 141) for transmitting driving force from the engine (16) to the reaping input case (40) at the base end of the main frame (38) is provided. The reaping section (8), that is, each tine (
21) f271 (291 (311, star foil f
23), the raking belt (24), the cutting blade (25), and each conveyor ceno f261 (281 (301) (321 f331).

On the other hand, the winnow shaft (43) of the winnow (42) in the threshing section (4) rotates by the driving force from the engine (16),
The feed chain (5) is driven and connected via a continuously variable transmission mechanism (44), and the continuously variable transmission mechanism (44) has a pair of transmission parts having a transmission cam (45) on the winnowing shaft (43). The input shaft (50) of the reduction gear case (49) is provided with a pulley (46) +471, and is also provided with a speed change cam (51), which is interposed between the rotary shaft (43) and the drive sprocket (48) of the feed chain (5). A pair of split pulleys fszl (531) are provided, and these split pulleys f
46) A continuously variable speed belt (54) is stretched between (471, f52) and f53), and a variable speed belt (43) is connected to the output shaft f55al of the feed chain variable speed motor (55), which is fixed to the left wall of the membrane removal. cam (51) for each arm +561
(571 and the connecting plate (58), and the gear shifting cam (51) of the input shaft (50) is interlockedly connected to the gear shifting cam (51) via each arm +571, +591 and the rond (60), Forward/reverse drive control of the speed change motor (55) (depending on the wholesaler, the split pulley (46
) (47), the diameter of the split pulley (521f53) on the feed chain (5) side is increased or decreased to increase or decrease the rotation transmitted to the input shaft (50). The feed chain (5) is configured to change speed and transmit this rotation to the drive subblock 1481 via a reduction gear gH611 in the reduction gear case (49) to drive the feed chain (5).

By the way, a pickup type vehicle speed sensor (63) is attached to the traveling transmission case (62) that drives the traveling roller (2) at variable speed, and a pickup type reaping speed sensor (64) is attached to the reaping input case (40). The gear case (49) is equipped with a pick-up type feed chain speed sensor (65), and the input shaft (41)
) and the engine (16), a continuously variable transmission mechanism (67) operated by forward/reverse drive control of the reaping variable speed motor (66) is interposed between the drive transmission system of the reaping section (8) and the engine (16) to change the reaping speed at each reaping section (8). It is configured to do this.

As shown in FIG. 7, each of the sensors (63) (64)
1+651, each speed increasing/decelerating circuit (68) is connected to the variable speed motor (551+661).
69) The control circuit (68) is output-connected via (70), and forward/reverse drive control of the transmission motor (55) f66) is performed based on the vehicle speed detected by the vehicle speed sensor (63). The feed chain speed (bl), which is the conveyance speed of the feed chain (5) as shown in the figure, and the reaping part (
8) is configured to obtain the relationship of the reaping speed (at), which is the conveyance speed, i.e., the reaping speed fa), when the vehicle speed (v) is O, as shown by the solid line in Fig. 8, the reaping speed (a
) is set to 0, and as the vehicle speed (ν) increases, the speed is changed according to a quadratic curve, and the feed chain speed tb+ is set to the required minimum speed (bll) when the vehicle speed (ν) is O. As the vehicle speed (ν) is increased, the gear is changed in a linear curve, and the vehicle speed (v) in the middle is a predetermined low speed (PI).
When reaching the mowing speed (all) and the feed chain speed (
bl) to match (al = bl), and when the vehicle speed (ν) is above a predetermined low speed (y,), the cutting speed (at) is always higher than the cutting speed (b). The feed chain speed fbl is maintained at a constant regular speed (b3) when the vehicle speed is higher than a predetermined high speed (V2).

This embodiment is configured as described above, and when the vehicle speed (ν) is below a predetermined low speed (1Pi), such as immediately after the start of the reaping operation, the reaping speed (al) is set at a relatively steep slope with respect to the vehicle speed (P).
At the same time, in the threshing section (4), the necessary minimum transport speed (bl) of the grain culm is ensured to ensure that the grain culm can be transported efficiently in the handling room. The residence time of the grain culm is kept to a necessary short time without making it long, thereby preventing the grain culm from being broken or straw waste is generated by the handling barrel. In addition, during normal high-speed harvesting work where the vehicle speed (p) is higher than a predetermined low speed (y+), by maintaining the reaping speed (al is higher than the feed chain speed fb), the grain is kept in the threshing section (4). When the culm is inserted, it is placed in a position that lags behind the head side, and is inserted in a proper position at a proper handling depth without being disturbed, thereby ensuring good threshing.

Furthermore, the feed chain speed (b) is kept at a constant regular speed (b) after the vehicle speed (y) reaches a predetermined high speed (1□) or higher.
By maintaining 3), a rapid increase in unhandled grains, grain scattering from the dust exhaust port, and broken ears can be prevented, and the vehicle speed (P
) from 0 to a predetermined high speed (V2), by keeping the speed difference (b3-bl) small, the residence time of the grain culm in the handling chamber is kept within the appropriate normal range and good threshing is achieved. It was designed to do this.

"Effects of the Invention" As is clear from the above embodiments, the present invention has the advantage that vehicle speed (v)
In a tR construction in which the reaping conveyance speed (a) and the conveyance speed (bl) of the feed chain (5) are changed according to ) is set to a low speed, and when the vehicle speed (P>> is above a certain amount, the reaping transport speed fa
), the conveyance speed tb+ of the feed chain (5) is set to a high speed, so the reaping conveyance speed fbl during low-speed harvesting, such as at the start of work, is also set to a low speed in synchrony with this, so that it is possible to pull out the grain culm before cutting. In addition to preventing disturbances in the conveying posture of the reaped grain culm, the feed chain (5) can maintain the minimum normal speed to perform good threshing work without rod breakage, while during normal high-speed harvesting work. , the feed chain (5) conveyance speed (b) is lower than the reaping conveyance speed (a)
) at a low speed, the tip of the grain culm is inserted into the threshing section (4) in a proper posture and at a proper handling depth without being in a delayed position, resulting in work accuracy without any split ears or unhandled grains. It produces remarkable effects such as excellent threshing.

[Brief explanation of the drawing]

Fig. 1 is an explanatory side view of the feed chain transmission section, Fig. 2 is an overall side view of the combine, Fig. 3 is a plan view thereof, Fig. 4 is an explanatory side view of the reaping section, and Fig. 5 is an explanatory plan view thereof. , FIG. 6 is a plan view of the feed chain transmission section, FIG. 7 is a control circuit diagram, and FIG. 8 is a transmission output diagram. (5)... Feed chain (a)... Reaping speed (reaping conveyance speed) (bl
... (feed chain) conveyance speed (y)
... Vehicles Joint applicant Yanmar Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] In a structure in which the reaping conveyance speed and the feed chain conveyance speed are changed according to the vehicle speed, when the vehicle speed is below a certain level, the feed chain conveying speed is lower than the reaping conveyance speed, and when the vehicle speed is above a certain level, the reaping conveyance speed is changed. A grain culm conveying device for a combine harvester, characterized in that the conveying speed of the feed chain is configured to be faster than the conveying speed of the feed chain.