JPH06217628A - Driving structure of combine harvester - Google Patents

Abstract

(57) [Summary] [Structure] The first transmission mechanism E that transmits the power that has passed through the HST 8 to the feed chain 4 and the power that does not pass through the HST 8 are fed so as to drive the feed chain 4 and the cutting section A in synchronization with the crawler 5. A second transmission mechanism F for transmitting to the chain 4, and a tuned transmission mode in which only the first transmission mechanism E is transmitted;
A switching mechanism G for selectively displaying a constant speed transmission mode in which only the second transmission mechanism F is transmitted is provided, and a speedometer 24 and a shift operation cylinder 21 of the switching mechanism G are provided. A control device 23 is provided that links the speedometer 24 and the electric motor cylinder 21 for shifting operation of the switching mechanism G so that the transmission mode is a uniform speed transmission mode at a predetermined speed or higher. [Effect] In addition to the mowing unit, the feed chain is synchronized with the traveling speed, while avoiding both the frequent occurrence of straw during low-speed work traveling and the frequent occurrence of stabbed paddle during high-speed working traveling. A type combine can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is designed so that the driving speed of the mowing section is increased as the traveling speed becomes faster, and the driving speed of the mowing section is also reduced as the traveling speed becomes slower, that is, the traveling transmission system and the mowing The present invention relates to a combine in which a transmission system is configured to drive the transmission system in synchronization.

[0002]

2. Description of the Related Art As a combine of this type, Japanese Patent Laid-Open No.
As disclosed in Japanese Patent No. 2771723, a technique is known in which engine power transmitted through a traveling transmission is transmitted to a feed chain as well as a mowing unit. In other words, due to the synchronized drive structure, the stalk transfer rate of the feed chain is also changed in accordance with the fluctuation of the amount of cutting stalk sent from the cutting unit per unit time, so that the transfer of stalks from the cutting unit to the feed chain is performed. The aim is to smoothly carry out the operation of transferring the stem and culm from mowing to threshing without clogging.

[0003]

The introduction of the above-mentioned tuning drive technique enables the efficiency of the cutting and threshing work to be achieved due to the smooth culm-conveying state, but, on the other hand, a new problem arises because the feed chain is also driven synchronously. It turned out to be inconvenient. That is, when the traveling speed is at or near the highest speed, the stalk transfer speed by the feed chain becomes excessive, and the tips move laterally at high speed with respect to the rotating handling barrel, resulting in frequent occurrence of small chaff. Therefore, if only the gear ratio to the feed chain is reduced so that threshing can be performed well even at the maximum working speed, this time the feed chain speed tends to be too slow during low-speed work running, resulting in excessive threshing processing time. In addition, the proportion of cut straw mixed in the first product is significantly increased, which causes a problem. An object of the present invention is to eliminate the inconvenience due to the tuned drive while adopting the tuned drive structure of the feed chain which has an advantage of contributing to the improvement of the overall performance.

[0004]

In order to achieve the above object, the present invention is provided with a mowing unit for mowing planted stem culms and sequentially supplying the mowed stalks to a threshing feed chain, and a transmission for traveling. In the drive structure of the combine configured to transmit the engine power via the threshing section, the threshing feed of the engine power via the transmission is performed so that the threshing feed chain and the mowing section are shifted in synchronization with the traveling device. A first transmission mechanism for transmitting to the chain and a second transmission mechanism for transmitting engine power not passing through the transmission to the threshing feed chain, the first transmission mechanism being in a transmission state,
In addition, a tuned transmission mode in which the second transmission mechanism is in the transmission disconnection state and a constant speed transmission mode in which the first transmission mechanism is in the transmission disconnection state and the second transmission mechanism is in the transmission state are alternatively displayed. A switching mechanism for outputting the speed, speed detection means for detecting the traveling speed, and an actuator for switching the switching mechanism,
When the traveling speed is equal to or lower than the predetermined speed, the synchronous transmission form is displayed, and when the traveling speed is equal to or larger than the predetermined speed, the uniform speed transmission form is displayed. Means are provided.

[0005]

[Function] By grasping the difference in the threshing treatment state when the transfer rate of the stalks by the feed chain was changed, it was found that the above-mentioned stinging paddy becomes remarkable when the transfer rate of the stalks exceeds a certain speed. Of. The certain speed is a value derived from various conditions such as a relative relationship between the rotation speed of the handling cylinder and the stalk transfer speed, and changes depending on the set conditions. The characteristic configuration is based on the above new recognition, and at a certain speed, that is, at or below a predetermined speed, the mowing section and the feed chain are both tuned to the traveling speed as a synchronous transmission form to efficiently and smoothly cut stems. Threshing process appears. Then, by driving the feed chain at a constant speed as a constant speed transmission mode at a predetermined speed or more, it is possible to avoid frequent occurrence of stab rice due to excessive culm transfer speed, and to maintain a stalk transfer speed that allows efficient shedding. The threshing process can be performed as smoothly as possible. By the way, in the constant-speed transmission mode, the feed chain drive speed is constant even if the amount of stalk transfer from the mowing section increases, so there is concern that delivery failure such as clogging of the stalk may occur. Since it is driven at a relatively high speed,
The stem-culm clamping volume there is a little larger than the volume conveyed by the mowing section, and there is almost no adverse effect.

In addition, the above-mentioned tuning and constant-velocity transmission modes are
Since the first transmission mechanism and the second transmission mechanism are made to appear in independent paths, the maximum drive speed of the feed chain by the first transmission mechanism at a predetermined traveling speed and the second transmission mechanism at the predetermined traveling speed The feed chain low speed drive speed can be set arbitrarily. As a result, for example, in FIG.
As described above, the maximum and low speed driving speeds are set to be the same or substantially the same so that the switching behavior of the transmission form is smooth with less shock, or the maximum and low speed driving speeds are made slightly different ( (See FIG. 3), it is possible to appropriately set the switching condition of the transmission mode according to the field and the type of culm to be harvested.

[0007]

Therefore, in addition to the mowing section, the feed chain is synchronized with the traveling speed, while avoiding both the frequent occurrence of straw during low-speed working traveling and the frequent occurrence of stabbed paddy during high-speed traveling. It was possible to provide a tuned drive type combine excellent in

[0008]

Embodiments of the present invention will be described below with reference to the drawings. A combine is shown in FIG. 4, A is a mowing section, B is a traveling machine body, and C is a threshing section. The mowing section A is equipped with a raising device 1, a mowing device 2, a conveying device 3, etc., and the mowing stem culms from the conveying device 3 are transferred to the threshing feed chain 4. Incidentally, 5 is a crawler traveling device, and 6 is a control section.

Next, the drive structure of this combine will be described. 1 shows a drive system, 7 is an engine, 8 is a hydrostatic continuously variable transmission (hereinafter abbreviated as HST), 9 is a main clutch, 10 is a mission, 8a is an output shaft of HST8,
11 is a reaping clutch, 12 is a counter shaft, 13 is a threshing clutch, 14 is a branch transmission mechanism, and 15 is a handling cylinder. In this drive system, the output of the output shaft 8a of the HST 8 is changed from the output of the cutting section A so that the cutting section A is shifted in synchronization with the crawler traveling device 5.
Have been entered. Then, the feed chain 4 is also synchronized with the crawler traveling device 5 so that the speed is changed so that the counter shaft 1
First transmission mechanism E for transmitting from 2 to the feed chain 4
And a second transmission mechanism F for transmitting engine power that does not pass through the HST 8 to the feed chain 4, and
The first transmission mechanism E is in the transmission state and the second transmission mechanism F is in the transmission disconnection state, and the first transmission mechanism E is in the transmission disconnection state, and the second transmission mechanism F is in the transmission state. A switching mechanism G for selectively displaying the constant speed transmission mode in the state is provided.

That is, the second pulley 17 which is belt-linked to the transmission shaft 16 and the first pulley 18 which is belt-linked to the counter shaft 12 are loosely fitted to the intermediate shaft 19, and
A meshing shifter 20 that meshes with one of the first and second pulleys 18 and 17 is slidably fitted onto the intermediate shaft 19 so as to be slidable.
And the like, the first transmission mechanism E engages with the second pulley 17 and the meshing shifter 2
The second transmission mechanism F is configured by 0 or the like. The meshing shifter 20 includes an electric cylinder (corresponding to an actuator) 21.
A speedometer (corresponding to a speed detecting means) 24 is connected to a control device 23 which is operated by a switching mechanism G including an oscillating fork 22 and controls the operation of the electric cylinder 21. When the traveling speed is equal to or lower than the predetermined speed, the meshing shifter 20 meshes with the first pulley 18 to provide a tuned transmission mode, and when the traveling speed is equal to or higher than the predetermined speed, the meshing shifter 20 causes the second pulley 17 to move. The control device 23 controls the speedometer 24 and the electric cylinder 21 in a coordinated manner so that the constant velocity transmission form appears by engaging with the.

For example, as shown in the relationship graph between the traveling speed and the driving speed of the feed chain 4 shown in FIG. 2, the driving speed of the feed chain 4 is 0 m / s in the traveling speed range of 0 m / s to 0.5 m / s. A synchronous transmission form (gradient line) that proportionally increases and decreases in the range from s to 0.8 m / s appears, and the traveling speed is 0.5 m
If it becomes / s or more, a constant speed transmission mode in which the feed chain speed is kept constant at 0.8 m / s appears, and at the switching point x, the feed chain speed by the first and second transmission mechanisms E, F. The respective gear ratios are set so that the two have the same speed (0.8 m / s).

As shown in FIG. 1, in the counter shaft 12, an input portion a to the mowing portion A and an input portion b to the first transmission mechanism E are provided.
And a feed transmission device 25 capable of shifting in three high and low stages.
Is provided and can be switched by a manual operation of the switching lever 26. During normal reaping operation, the feed transmission 25 is switched to the medium speed position so that the speed relationship shown by the solid line in the graph of FIG. 2 appears, and when adverse conditions such as lodging occur, the feed transmission 25 is moved to the high speed side. 2 and the switching point is changed from x to x ′, which is the lower traveling speed side, as shown by the phantom left line in FIG. In addition, under good conditions such as when the rice is sufficiently dried, the feed transmission 25 is switched to the low speed side, and the switching point is set to x as shown by the right phantom line in FIG.
To change to x "which is the faster side.

If a setting device 27 capable of changing and setting the traveling speed at the switching point is connected to the control device 23, as shown in the graph of FIG. It is also possible to shift y, which is the maximum speed in the tuning drive state, to the lower speed side and intentionally make a speed difference at the tuning point of the transmission form and the switching point at the constant speed.

[Other Embodiments] When the switching mechanism G is operated, the feed chain speed actually decreases for a moment due to the time lag required for occlusal switching. For example, the transmission disconnection operation of the second transmission mechanism F is started. From the time until the first transmission mechanism E is completely in the transmission state, the second pulley 17
It is convenient to add a mechanism for rotating the intermediate shaft 19 together with the intermediate shaft 19.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a system diagram showing a combine transmission system.

FIG. 2 is a chart showing a relationship graph between traveling speed and feed chain speed.

FIG. 3 is a chart showing another relationship graph between traveling speed and feed chain speed.

FIG. 4 is a side view of the convine.

[Explanation of Codes] 4 Feed chain 5 Traveling device 8 Transmission 21 Actuator 23 Control means 24 Speed detecting means A Cutting unit E First transmission mechanism F Second transmission mechanism G Switching mechanism

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshitaka Fukuoka 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd.

Claims (1)

[Claims] 1. A cutting section (A) for cutting a planted stem culm and sequentially feeding the stalked culm to a threshing feed chain (4), and the engine power through a transmission (8) for traveling is A combine drive structure configured to be transmitted to a mowing section (A), wherein the threshing feed chain (4) and the mowing section (A) are shifted in synchronization with a traveling device (5). As described above, the first transmission mechanism (E) for transmitting the engine power that has passed through the transmission (8) to the threshing feed chain (4) and the engine power that has not passed through the transmission (8) are used for the threshing feed chain (4). ), A second transmission mechanism (F) for transmitting to the), the first transmission mechanism (E) is in a transmission state, and the second transmission mechanism (F) is in a transmission disconnection state, The first transmission mechanism (E) is disconnected. State, and the second transmission mechanism (F) is provided with a switching mechanism (G) that selectively expresses a constant speed transmission mode in which the second transmission mechanism (F) is in a transmission state, and a speed detection means (24) for detecting a traveling speed. ) And an actuator (21) for switching operation of the switching mechanism (G), and when the traveling speed is less than or equal to a predetermined speed, the tuning transmission mode appears, and the traveling speed is more than or equal to the predetermined speed. A drive structure for a combine, comprising: a control means (23) for linking the speed detection means (24) and the actuator (21) in a state where the uniform speed transmission form appears.