JPH04179410A - Transmission structure of threshing device - Google Patents

Abstract

PURPOSE:To obtain the title device capable of simplifying the structure by using both as a change gear for changing the speed of a feed chain and the rotation of a fan by interlocking and connecting the feed chain for feeding and carrying grain culms to threshing chamber to the fan for discharging dust on the upper side of transmission in a decelerated state and providing the change gear on the side upper than the fan for discharging dust. CONSTITUTION:In a transmission structure of threshing device of combine, etc., provided with a threshing chamber A for housing a threshing drum 2 for subjecting reaping grain culms, held and carried from the front of a machine body toward the rear side by a feed chain 1 to threshing treatment and also with a fan 7 for sucking and discharging dust generated inside, the feed chain 1 for feeding grain culms to the threshing chamber A is interlocked and connected to the fan 7 on the upper side of transmission in a decelerated state, and a change gear 20 is provided on the side upper than the fan 7. Thereby, the gear change 20 is used both as changing the speeds of the feed chain 1 and the rotation numbers of the fan 7.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is characterized in that a feed chain for supplying and conveying grain culms to a handling chamber is interlocked and connected in a decelerated state to a dust removal fan on the upper side of the transmission. This invention relates to a transmission structure of a threshing device.

[Conventional technology]

Conventionally, the transmission for the feed chain was provided on the upper side of the transmission than the rotating shaft of the dust removal fan.

[Problem to be solved by the invention]

For example, increasing the grain culm conveyance speed by the feed chain increases the amount of grain culm processed by the threshing device, so in order to maintain appropriate threshing performance, the suction power of the dust exhaust fan must be adjusted according to the amount of grain processed by the threshing device. Is it necessary?

However, if the transmission of the feed chain is located on the upper side of the transmission than the rotating shaft of the dust removal fan, the rotation speed of the dust removal fan cannot be changed in conjunction with the feed chain speed change, so the dust removal fan's suction The force will be out of proper condition.

The present invention has been made in view of the above circumstances, and an object thereof is to enable the conveyance speed of the feed chain and the rotation speed of the dust removal fan to be changed in conjunction with each other.

[Means for solving the problem]

The transmission structure of the threshing device according to the present invention is such that a feed chain for supplying and conveying grain culms to a handling chamber is interlocked and connected in a decelerated state to a dust removal fan on the upper side of the transmission, and its characteristic configuration is The second feature is that a transmission is provided on the upper side of the transmission than the dust removal fan.

[For production]

By providing the transmission device on the upper side of the transmission than the dust removal fan, the conveyance speed of the feed chain and the rotation speed of the dust removal fan can be increased or decreased in conjunction with one transmission device.

〔Effect of the invention〕

Therefore, by making a simple structural improvement in which the transmission is used both for the feed chain and for the dust removal fan, the suction force of the dust removal fan will not deviate from its proper state even if the feed chain is changed in speed. reached.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, an embodiment in which the present invention is applied to a threshing device of a combine harvester will be described based on the drawings.

As shown in Figure 2, the threshing device of a combine harvester consists of a handling barrel (2) that handles and processes the cut grain culms that are pinched and conveyed from the front to the rear of the machine by a feed chain (1), and a handling chamber (2) that stores the harvested grain culms. A), the receiver placed below the handling room (A) is a screen (3), the receiver is a swinging sorting plate (4) for swinging and sorting the leakage from the screen, and its swinging. Dynamic sorting board (4
), a winnowing machine (5) that blows a sorting air to the dryer, and a rotary diffusion cylinder (6) that acts on the straw waste sent out from the handling chamber (A).
a dust exhaust fan (7) that sucks and discharges dust generated inside the threshing device to the outside of the threshing device; and a first screw (8) that collects grains as the first product from the swinging sorting plate (4); A second screw (9
) and a thrower (10) for returning the second material collected by the second screw (9) onto the swinging sorting plate (4). In the figure, (11) is a grain sheave placed above the first screw (8), and (12)
is a chaff sieve located above the grain sieve (11).

As shown in Fig. 1, the output of the engine (E) is transmitted to the transmission (13) for driving by a belt, and is also transmitted to the handling cylinder (2), the winnowing machine (5), and the first screw (8). The power is transmitted through a belt transmission or a gear transmission, respectively.

The driving force transmitted to the first screw (8) is transmitted to the diffusion cylinder (6), the second screw (9), and the swinging sorting plate (4).
), the belt is transmitted to the swing shaft (14) in that order. In the figure, (15) is a straw cutter that is rotated by the driving force transmitted by a belt to the swing shaft (14) or further transmitted by a belt, and (16) is a straw cutter that is rotationally driven by the driving force transmitted by a belt to the swing shaft (14). 2) is a scrap chain driven by the driving force transmitted by the belt from the rotating shaft (I7); (18) is a transmission section for traveling that is transmitted with the output of the traveling transmission (13); (Sl); is a vehicle speed sensor that detects the vehicle speed based on the input rotational speed to the transmission section (I8).

In addition, in FIG. 1, (40) is a lifting device, (41)
(42) is the cutting blade, (42) is the auxiliary conveyance device for merging the cut husk, (
Reference numeral 43) denotes a stock head conveyor for transporting the combined harvested husk culms to the threshing device, and reference numeral (44) denotes a cutting end conveyor provided opposite to the stock head conveyor (43).

As shown in FIGS. 3 and 4, the dust removal fan (7
) is rotatably driven by a driving force transmitted by a belt from the rotating shaft (19) of the diffusion cylinder (6) via a split pulley type transmission (20). The driving force transmitted to this dust removal fan (7) is a gear-type reduction mechanism (21)
The feed chain (
1). In other words, when the transmission (20) is operated, the dust removal fan (7) and the foot chain (1) are interlocked to change the speed.

The transmission (20) has a rotation shaft (
19), an input pulley (24) attached to an input shaft (23) that is gear-transmitted, and an output pulley (25) that is belt-transmitted to the manual pulley (24). The rotating shaft (2) of the dust removal fan (7)
6). Both the input pulley (24) and the output pulley (25) are configured in a split pulley type,
When one diameter is changed from small to large, the other diameter is also changed from large to small.

To explain, the diameter of the input pulley (24) is determined by the cam (
27A) to change the input side gear shift arm (27A).
7) and an output-side speed change arm (28) that changes the diameter of the output pulley (25) using a cam (27A) are interlocked and connected by a rod (29).

The speed change arm (27) on the input side engages with a screw shaft (30) rotationally driven by an electric motor (M3) serving as a speed change actuator, and moves along the longitudinal direction of this screw shaft (30). Engaging with the top member (31),
The input pulley (24) is operated to swing around the input shaft (23).

In addition, in the figure, (32) and (33) are the gear shift arm (
27) As the operating limit is reached, the gear shift arm (
27) is a switch-type operating limit detection sensor that is turned on when it comes into contact with the sensor.

The speed-changed driving force transmitted to the rotating shaft (26) of the dust removal fan (7) is transmitted to the gear type reduction gear attached to the rotating shaft (26) on the opposite side of the output pulley (25). The belt is transmitted to the drive sprocket (34) of the feed chain (1) via a mechanism (21) and a clutch (22). In addition, in Figure 3, (
35) is a transmission relay shaft from the second screw (9) to the straw cutter (15).

By the way, the threshing device automatically adjusts its sorting state according to the throughput, and the feed chain (1)
The drive speed is also automatically adjusted according to the vehicle speed.

In a combine harvester, as the vehicle speed increases, the amount of grain culm that is reaped increases, and as a result, the amount of waste that leaks from the handling room (A) increases. Therefore, the vehicle speed is detected, and as the vehicle speed increases, the selection state corresponding to the processing amount increases.

To explain the configuration for changing and adjusting the sorting state, as shown in FIG. 2, the chaff sieve (12) is
A plurality of band plate-like members (12A) are arranged side by side at a predetermined interval (1) in the longitudinal direction of the aircraft, and the interval (t) (abbreviated as chaff opening degree in the following explanation) is As shown in Fig. 1, the adjustment is made by an electric motor (Ml) as an actuator depending on the vehicle speed. Also, although I will not go into details, the number of rotations of the winnowing machine (5) can be freely changed using a split pulley type transmission (not shown) like the transmission (20) of the dust removal fan (7). The number of revolutions is changed by an electric motor (M2) as an actuator in accordance with the vehicle speed to change and adjust the amount of air blown (hereinafter referred to as "air amount" for short).

Furthermore, if the driving speed of the feed chain (1) is constant, the amount of grain culms transported by the feed chain (1) per unit time will also increase as the vehicle speed increases. As a result, the volume of grain culm conveyed by the feed chain (1) increases, and as the vehicle speed increases, the load on the handling cylinder (2) increases. Therefore, by changing and adjusting the drive speed of the feed chain (1) in proportion to the vehicle speed, the amount of grain culm transported per unit time is leveled out. In addition, as the amount of processed material in the threshing device increases, the amount of straw waste generated also increases, so a dust removal fan (
7) can be changed at the same time to adjust the amount of suction and discharge per unit time.

As shown in FIG. 5, based on the information from the vehicle speed sensor (Sl), the chaff opening adjustment electric motor (Ml)
, an electric motor (M2) for adjusting the air flow rate, and
A control device (36) using a microcomputer is provided to control the operation of the dust removal fan (7) and the variable speed electric motor (M3) of the feed chain (1). In the figure, (S2) is a threshing switch that detects whether a threshing clutch (not shown) is in an engaged state or in a disengaged state, which operates the power transmission from the engine (E) to the threshing device. , is provided for inputting control information to the M control device t (36) so that the sorting state and the drive speed of the feed chain (1) can be automatically adjusted only when the threshing device is in operation. There is.

In the figure, (S3) is a target chaff opening setting device that sets the target value of the chaff opening at the same vehicle speed, (S4) is a target chaff air volume setting device that sets the target value of the chaff air volume at the same vehicle speed, ( S5) is a target feed chain speed setting device that sets a target value of the feed chain speed at the same vehicle speed.

To explain the operation of the control device (36), the sixth
As shown in the figure, the chaff opening increases as the vehicle speed increases, and as shown in FIG. It is designed to change and adjust in proportion to the vehicle speed from the sorting state. Similarly, the rotation speeds of the foot chain (1) and the dust removal fan (7) are set at a target value at the same vehicle speed, so that the rotation speed increases as the vehicle speed increases, as shown in FIG. The target rotation speed corresponding to the foot chain speed is automatically changed and adjusted in proportion to the vehicle speed. However, in order to prevent the grain culm conveyance from stopping due to temporary stoppages, etc., the vehicle speed is maintained at the set speed below the set vehicle speed.

[Another example]

In the above embodiment, the transmission (20) is configured as a split pulley type, or may be configured as a gear type, and the specific configuration of the transmission can be changed in various ways.

Further, in the above embodiment, the sorting state is automatically adjusted according to the vehicle speed, and the foot chain (1) is automatically shifted according to the vehicle speed. You may also do so.

It should be noted that the present invention is not limited to the structure of the attached drawings by adding numerals in the claims for convenient comparison with the drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the transmission structure of the threshing device according to the present invention, FIG. 1 is an explanatory diagram of the power transmission system, FIG. 2 is a cutaway side view of the threshing device, and FIG. 3 is a cutaway plan view of the transmission. Figure 4 is a side view of the same side, Figure 5 is a block diagram of the control configuration, Figure 6 is a diagram showing the relationship between Tumi air volume and vehicle speed, Figure 7 is a diagram showing the relationship between chaff opening and vehicle speed, and Figure 8 is a diagram showing the relationship between chaff opening and vehicle speed. is a drawing showing the relationship between feed chain speed and vehicle speed. (A)... Handling room, (1)... Feed chain, (7)... Dust removal fan, (20)
・・・・・・Transmission device.

Claims (1)

[Claims] The dust removal fan (7) on the upper side of the transmission is connected to the handling room (A).
A transmission structure of a threshing device in which a feed chain (1) for supplying and conveying grain rods is interlocked and connected in a deceleration state,
A transmission structure for a thresher in which a transmission (20) is provided on the upper side of the transmission than the dust removal fan (7).