JPH0630639A - Transmission structure of combine harvester - Google Patents

Abstract

PURPOSE:To obtain a transmission structure of a combine harvester capable of always smoothly carrying grain culms regardless of change of machine travelling speed by improvement of simple transmission structure. CONSTITUTION:The transmission structure of combine harvester is constituted so as to gather grain culms reaped by a reaping device along the direction of reaping width by an auger and then rake up and carry these grain culms toward the backward thresher by a feed conveyer 10. In this transmission, power is fed through one-way rotation clutch 16 by which rotation of the power after gear change of a hydrostatic transmission(HST) for machine body traveling is transmitted only to the advancing direction to a driving shaft 14 of the feed conveyer 10 and simultaneously a power from an engine E is transmitted to the driving shaft 14 and a rotation shaft 24 rotated at the prescribed number of revolutions is interlocked through one-way rotation clutch 25 with the driving shaft 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a structure in which cut grain culms cut by a cutting device are gathered together by an auger along the cutting width direction and then scraped up and conveyed by a feed conveyor toward a rear threshing device. It relates to the transmission structure of the combine.

[0002]

2. Description of the Related Art Conventionally, in the above combine power transmission structure, the feed conveyor has a structure in which it is rotationally driven at a constant speed, and its driving speed is set to a high speed in accordance with a high flow rate of the grain culm processing amount. It was set. Further, this feed conveyor has a structure in which a pair of left and right endless chains are wound around the front and rear wheels, and a scraping member is erected and connected at a constant pitch over each chain.
The wheel on the transport start end side was formed into a large-diameter tubular shape in order to smoothly scrape the grain culm and prevent it from entering the inside of the winding portion of the chain (for example, the actual application by the applicant). Three
-53412].

[0003]

However, according to the above conventional structure, the feed conveyor is always driven at a constant high speed regardless of the amount of grain culm.
If the machine traveling speed is high and the amount of treated grain culm is large, there is an advantage that good scraping and conveying can be performed.However, for example, if the traveling speed is slow and the amount of grain culm is small, it will increase with the high speed rotation of the endless chain. The cylindrical tubular body may vibrate to generate a large driving noise, which has a bad influence on the working environment. The present invention aims to eliminate the above-mentioned problems.

[0004]

The characteristic structure of the present invention is that, in the power transmission structure of the combine described at the beginning, a one-way rotating clutch through which the power after the gear shifting of the vehicle body traveling transmission is transmitted only in the forward direction is transmitted. Power is supplied to the drive shaft of the feed conveyor, and the constant-speed rotary shaft that is transmitted with power from the engine and rotates at a predetermined rotation speed and the drive shaft are linked and linked through a one-way rotary clutch. It is in.

[0005]

In the high-speed traveling state in which the machine body traveling speed is equal to or higher than the predetermined value, the feed conveyor can efficiently carry the grain culm at a speed synchronized with the traveling speed. When the vehicle is traveling at a low speed below a predetermined value, the feed conveyor is supplied with power from the constant speed rotating shaft through the one-way rotating clutch, and even if the traveling speed is further reduced, there is always no hindrance to the transfer of grain culms. It will be driven at a constant low speed.

[0006]

Therefore, when traveling at a relatively high speed, paying attention to the fact that the amount of cut culm to be treated is almost proportional to the traveling speed of the machine, the feed conveyor follows the speed and conveys at a synchronous speed. Therefore, smooth transportation can be performed without causing clogging of grain culms. Further, when the vehicle is traveling at a low speed, the feed conveyor is driven at a predetermined low speed at which the accumulation of grain culms is unlikely to occur,
It has become possible to prevent the occurrence of vibrations by suppressing the drive rotation speed to the necessary minimum without causing a decrease in the efficiency of grain culm transportation. As an effect similar to the above-mentioned effect, a continuously variable transmission which is variable in speed by an actuator is provided in a transmission system for a feed conveyor, and a sensor for detecting a machine traveling speed is provided. Although a configuration in which the actuator is automatically controlled based on the detected value is conceivable, this configuration has a drawback that the structure becomes complicated. is there.

[0007]

Embodiments will be described below with reference to the drawings. Figure 4
Shows the all culm input type combine. This combine is equipped with a threshing device 3 equipped with a handling barrel that rotates around a longitudinal axis on a machine body frame 2 equipped with a crawler traveling device 1, and at the front part of the machine body a cutting pretreatment device 4 by a hydraulic cylinder 5. It is configured so that it can be moved up and down around a horizontal axis X1. The cutting pretreatment device 4 includes a take-up reel 6 that guides the tip end side of the planted grain stalk to the rear side while rotating, a cutting device 7 that cuts the root part of the planted grain culm as the machine travels, A belt conveyor 8 for placing and transporting the grain culms rearward, an auger 9 for collecting the harvested grain culms in the center of the cutting width direction, and a narrow width for scraping up and transporting the whole amount of the grain culms collected in the center toward the threshing device 3. The feed conveyor 10 of FIG. The take-in reel 6 is supported on the tip end side of a support arm 12 which is pivotally supported about a horizontal axis X2 with respect to a support frame 11, and is vertically movable by a hydraulic cylinder 13. Further, the feed conveyor 10 is constructed by vertically connecting a pair of left and right endless rotating chains 10a with a scraping member 10b erected at a constant pitch, and a wheel body 10c on the transport starting end side is formed in a large-diameter cylindrical shape. . Next, the transmission structure will be described. Mowing pretreatment device 4
In contrast, the power from the engine E on the traveling machine side is supplied via the input shaft 14 provided on the ascending / descending swing axis X1, and the pre-mowing processing device 4 operates at a high machine traveling speed of a predetermined speed or more. In some cases, the transmission system is configured to be driven at a speed that is synchronized with the machine traveling speed, and to be driven at a predetermined constant speed when traveling at a lower speed than that. More specifically, as shown in FIGS. 1 and 3, the vehicle travels so that the power of the engine E is supplied to the crawler traveling device 1 via a hydrostatic continuously variable transmission HST [an example of a vehicle body traveling transmission]. A transmission system is provided, and the power transmission is provided to the up-and-down swing axis core X1 via a one-way rotation clutch 16 and a transmission belt 17 through which power is transmitted only when the machine body travels forward from the output shaft 15 after shifting of the transmission HST. The power is transmitted to the input shaft 14. The input shaft 14 is also configured as a drive shaft of the feed conveyor 10, and drives the feed conveyor 10 at a speed synchronized with the machine traveling speed by a forward-direction shift output, and feeds from the input shaft 14 via a transmission belt 18. The power after shifting is transmitted to the vehicle speed synchronizing shaft 19 provided on the conveyance start end side of the conveyor 10, and is supplied from the vehicle speed synchronizing shaft 19 to the mowing section 20 including the auger 9, the mowing device 7, and the belt conveyor 8, respectively. ,
A power transmission system is configured so that the power is supplied to the take-in reel 6 via the power transmission belt 21 and the power transmission chain 22. Therefore, the feed conveyor 10, the mowing unit 20, and the take-up reel 6, that is, the entire mowing pretreatment device 4 is driven at a speed synchronized with the vehicle speed. On the other hand, near the upper side of the vehicle speed synchronizing shaft 19, there is provided a constant speed rotating shaft 24 through which a power of the engine E is transmitted via a pulley 23 fitted around the input shaft 14 in a free-rotating manner. The vehicle speed synchronizing shaft 19 and the vehicle speed synchronizing shaft 19 are interlocked with each other via a one-way rotating clutch 25. The rotation speed of the constant-speed rotary shaft 24 is set to a value close to the minimum speed at which the machine body can perform the mowing work without hindrance. With this configuration, when the machine body travels at high speed, as shown in FIG. 2, the entire pre-mowing treatment device 4 is driven at a speed substantially proportional to the vehicle speed, and the machine body travels faster than the predetermined speed V1. When the speed becomes slow, the rotation speed of the constant speed rotary shaft 24 becomes faster than the speed of the vehicle speed synchronizing shaft 19, and when the vehicle speed is slower than this state, the unidirectional rotary clutch 25 causes the pre-mowing treatment device 4 to operate. It is driven at a constant speed by the constant speed rotary shaft 24.

As described above, instead of the whole pre-mowing processing device 4 being driven synchronously in proportion to the vehicle speed, the auger 9 is accelerated from the constant speed rotary shaft 24 to supply power, thereby maintaining a constant high speed. It may be configured to drive at a speed.

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

[Brief description of drawings]

[Fig. 1] Transmission system diagram

[Figure 2] Speed characteristic diagram

FIG. 3 is a side view of a pre-cutting processing unit.

FIG. 4 is an overall side view of the combine.

[Explanation of symbols]

 3 Threshing device 7 Mowing device 9 Auger 10 Feed conveyor 14 Drive shaft 16 Unidirectional rotating clutch 24 Constant speed rotating shaft 25 Unidirectional rotating clutch E Engine HST Transmission

Claims (1)

[Claims] 1. After gathering the cut culms cut by the cutting device (7) along the cutting width direction by the auger (9), the feed conveyor (10) directs them toward the rear threshing device (3). It is a combine transmission structure configured to be scraped up and conveyed, and comprises a speed change device (HS) for machine body traveling.
The power after the gear change of (T) is supplied to the drive shaft (14) of the feed conveyor (10) through a one-way rotation clutch (16) in which rotation is transmitted only in the forward direction, and
Transmission of a combine in which a constant speed rotary shaft (24) which receives power from the engine (E) and rotates at a predetermined rotational speed and the drive shaft (14) are interlockingly linked via a one-way rotary clutch (25). Construction.