JP2813643B2 - Combine transmission structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction in which harvested grain stalks harvested by a mowing device are gathered along an auger along a width direction of the auger, and then scraped up by a feed conveyor to a rear threshing device. Related to the transmission structure of the combine.

[0002]

2. Description of the Related Art Conventionally, in the above-described combine transmission structure, the feed conveyor is conventionally driven to rotate at a constant speed, and the drive speed is set to a high speed in accordance with a case where the throughput of grain culm is high. Was set. Also, 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 raking member is erected and connected at a constant pitch over each chain.
The ring on the transport start end side was formed in a large-diameter cylindrical shape to smoothly scrape the grain stalk and to prevent it from entering the inside of the chain winding part (for example, Japanese Utility Model Application 3
-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 cereal stem.
When the running speed of the machine is high and the amount of processed culm is large, there is an advantage that good scraping and transport can be performed.However, for example, when the running speed is low and the amount of cereal culm is small, the speed increases with the endless chain rotating at high speed. In some cases, a large cylindrical driving body vibrates to generate a large driving noise, which has a negative effect on the working environment. An object of the present invention is to eliminate the above disadvantages.

[0004]

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

[0005]

In a high-speed running state in which the machine running speed is equal to or higher than a predetermined value, the feed conveyor can efficiently transport grain culm at a speed synchronized with the running speed. In the case of low-speed traveling equal to or less than the predetermined value, the feed conveyor is supplied with power from the constant-speed rotating shaft via the one-way rotating clutch, so that even if the traveling speed is further reduced, there is no obstacle to grain culm transport. It will be driven at a constant low speed.

[0006]

Therefore, when the vehicle is driven at a relatively high speed, paying attention to the point that the processing amount of the harvested grain culm is substantially proportional to the traveling speed of the machine, the feed conveyer follows up the transport at the synchronous speed. This allows smooth transport without clogging of the grain stem. In addition, at the time of low-speed running, since the feed conveyor is driven at a predetermined low speed at which grain stalk accumulation is unlikely to occur,
It has become possible to prevent the occurrence of vibration by suppressing the driving rotation speed to the minimum necessary without causing a decrease in the efficiency of grain culm transport. In addition, as an effect similar to the above-described effect, a continuously variable transmission that can be shifted by an actuator is interposed in the transmission system for the feed conveyor, and a sensor that detects the vehicle traveling speed is provided. Although a configuration in which the actuator is automatically controlled based on the detected value is conceivable, such a configuration has a disadvantage that the structure becomes complicated. is there.

[0007]

Embodiments will be described below with reference to the drawings. FIG.
Fig. 1 shows a combine with all culms. This combine mounts a threshing device 3 having a handling drum rotating around an axis in the front-rear direction on a body frame 2 provided with a crawler traveling device 1, and a mowing pre-processing device 4 is mounted on a front portion of the machine by a hydraulic cylinder 5. It is configured so as to be driven up and down freely around the horizontal axis X1. The pre-cutting treatment device 4 includes a raking reel 6 that rakes and guides the tip side of the planted grain culm to the rear side while rotating, a cutting device 7 that cuts a root portion of the planted grain culm with the machine running, Belt conveyor 8 for placing and transporting grain stalks backward, auger 9 for gathering harvested grain culms to the center side in the cutting width direction, and narrow width for scraping and transporting the entire amount of grain culms collected in the center toward threshing device 3 And the like. The raking reel 6 is supported on the distal end side of a support arm 12 pivotally supported so as to be vertically swingable about a horizontal axis X2 with respect to a support frame 11, and is provided so as to be vertically movable by a hydraulic cylinder 13. The feed conveyor 10 is constructed by connecting and pulling up a pair of left and right endless rotating chains 10a with a constant pitch at a constant pitch, and the transport starting end side wheel body 10c is formed into a large-diameter cylindrical shape. . Next, the transmission structure will be described. Pre-cutting device 4
, Power from the engine E on the traveling body is supplied via the input shaft 14 provided on the vertical swing axis X1, and the reaping pre-processing device 4 operates at a high speed where the body traveling speed is equal to or higher than the predetermined speed. In some cases, the transmission system is configured to be driven at a speed synchronized with the vehicle running speed, and to be driven at a predetermined constant speed when the vehicle runs at a lower speed. More specifically, as shown in FIGS. 1 and 3, the traveling of the engine E is performed such 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 traveling transmission). A transmission system is provided, and the transmission system is disposed on the lifting / lowering rocking shaft X1 via a one-way rotary clutch 16 and a power transmission belt 17 to which power is transmitted only when the vehicle travels forward from the output shaft 15 after the speed change of the transmission HST. The input shaft 14 is configured to transmit power. The input shaft 14 is also used as a drive shaft of the feed conveyor 10. The input shaft 14 drives the feed conveyor 10 at a speed synchronized with the machine running speed by a shift output on the forward side, and feeds from the input shaft 14 via the transmission belt 18. The speed-changed power is transmitted to a vehicle speed synchronizing shaft 19 provided on the conveyor start end side of the conveyor 10, and is supplied from the vehicle speed synchronizing shaft 19 to a cutting unit 20 including the auger 9, the cutting device 7, and the belt conveyor 8, respectively. ,
A power transmission system is configured to be supplied to the raking reel 6 via the power transmission belt 21 and the power transmission chain 22. Therefore, the feed conveyor 10, the cutting unit 20, and the scraping reel 6, that is, the entire pre-cutting device 4 are driven at a speed synchronized with the vehicle speed. On the other hand, near the upper side of the vehicle speed synchronous shaft 19, there is provided a constant speed rotating shaft 24 through which the power of the engine E is transmitted through a pulley 23 which is fitted around the input shaft 14 by idle rotation. The vehicle speed synchronizing shaft 19 is linked to the vehicle speed synchronizing shaft 19 via a one-way rotation clutch 25. The rotation speed of the constant-speed rotation shaft 24 is set to a value close to the minimum speed at which the machine can perform the harvesting operation without any trouble. With this configuration, when the machine is traveling at high speed, as shown in FIG. 2, the entire pre-cutting device 4 is driven at a speed substantially proportional to the vehicle speed, and the machine running speed is lower than the predetermined speed V1. When the speed decreases, the rotation speed of the constant-speed rotation shaft 24 becomes faster than the speed of the vehicle speed synchronization shaft 19, and when the vehicle speed is lower than this state, the one-way rotation clutch 25 operates to cut the pre-cutting device 4 It is driven at a constant speed by the constant speed rotation shaft 24.

As described above, instead of the whole pre-cutting device 4 being driven synchronously in proportion to the vehicle speed, the auger 9 is increased in speed from the constant-speed rotating shaft 24 to supply power and to maintain a constant high speed. It may be configured to drive at a speed.

In the claims, reference numerals are provided to facilitate comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 Transmission system diagram

FIG. 2 is a speed characteristic diagram

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

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

[Explanation of symbols]

 Reference Signs List 3 threshing device 7 mowing device 9 auger 10 feed conveyor 14 drive shaft 16 one-way rotating clutch 24 constant speed rotating shaft 25 one-way rotating clutch E engine HST transmission

Claims (1)

(57) [Claims] The harvesting culm harvested by the harvesting device (7) is gathered by the auger (9) along the direction of the cutting width, and then directed toward the rear threshing device (3) by the feed conveyor (10). A transmission structure for a combine configured to be transported by a scraper, comprising a transmission for traveling a vehicle (HS).
T) supplies power to the drive shaft (14) of the feed conveyer (10) through a one-way rotary clutch (16) in which the power after the speed change is transmitted only in the forward direction,
The transmission of a combine, in which motive power from an engine (E) is transmitted and a constant speed rotation shaft (24) rotating at a predetermined rotation speed and the drive shaft (14) are linked and linked via a one-way rotation clutch (25). Construction.