JPH0212841Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a handling barrel drive device for a threshing machine, particularly for a combine harvester.

Generally, the load acting on this type of handling drum increases when the grain culm in the field is dense or wet, but conventionally, the engine speed has been increased or decreased in response to load fluctuations on the handling drum. I have dealt with it by doing this. However, even if the power (horsepower) of the engine is increased by increasing the number of revolutions, the torque is approximately constant, so the rotational torque of the handling cylinder does not increase, and the handling chamber becomes clogged with material, causing the rotation of the handling cylinder. There were times when the system stopped and threshing became impossible.

Therefore, the present invention involves interposing a transmission such as a continuously variable transmission in the power transmission line of the handling cylinder, operating the continuously variable transmission by a load acting on the handling cylinder, and operating the continuously variable transmission. When the engine is operated in connection with this and the load acting on the handling cylinder increases, the continuously variable transmission is decelerated to increase the rotational torque and the engine rotational speed is increased, thereby eliminating the above-mentioned drawbacks. It is an object of the present invention to provide a handling cylinder drive device that eliminates the above problems.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the combine 1 has a frame 3 supported by a crawler 2.
An engine 5 and a thresher 6 are mounted on the frame 3. The engine 5 has its rotational speed adjusted by an accelerator link 7, and drives a threshing drive pulley 10 via a gear case 9. On the other hand, the threshing machine 6 has a handling barrel 11 and a feed chain 12, and uses the feed chain 12 to clamp and convey grain culms conveyed from a pretreatment section (not shown).
The grain is threshed by the handling cylinder 11. In addition, the drive pulley 10
A counter shaft 13 is disposed at an intermediate portion of the handling cylinder 11, and a belt 16 is wound between a counter pulley 15 fixed to the counter shaft 13 and a drive pulley 10. Furthermore, a continuously variable speed pulley 17 is supported on the counter shaft 13, and a continuously variable speed pulley 20 is also supported on the handling cylinder shaft 19 to which the handling cylinder 11 is fixed and supported.
A continuously variable transmission belt 21 is wound between these pulleys 17 and 20.

As shown in FIG. 2, the input side continuously variable speed pulley 17 consists of a fixed pulley piece 17a fixed to the counter shaft 13 and a movable pulley piece 17b slidably supported.
b is urged toward the fixed pulley piece 17a by a spring 22 compressed between it and the counter pulley 15. On the other hand, the output side continuously variable speed pulley 20
consists of a pulley piece 20a that is supported while being prevented from sliding relative to the handling cylinder shaft 19, and a movable pulley piece 20b that is supported so as to be slidable and rotatable. Furthermore, a boss 23 having a slope 23a is fixed to the tip of the handling barrel shaft 19 by a key 25, and the slope 23a of the boss 23 is connected to the boss 2 of the movable pulley piece 20b.
It engages with the slope 26a formed in 6. Further, a case 29 is fixed close to the outer peripheral surface 27 of the movable pulley piece 20b, and a case 29 is slidably attached to the case 29 and is biased by a spring 30 so as to come into contact with the outer peripheral surface 27 of the movable pulley piece 20b. pin 3
1 is supported, and the pin 31 is connected to a wire 32
It is connected to the accelerator link 7 of the engine 5 via. In addition, 33 in Figure 1 is a divider, 3
5 is the mission.

Since this embodiment has the above-described configuration, the rotation of the engine 5 is transmitted to the counter shaft 13 via the gear case 9, the threshing drive pulley 10, the belt 16, and the counter pulley 15. It is transmitted to the handling cylinder shaft 19 via the variable speed belt 21 and the continuously variable speed pulley 20, and drives the handling cylinder 11. At this time, when the load acting on the handling cylinder 11 is in a normal state, as shown by the solid line in FIG. Then, the outer circumferential surface 27 of the movable pulley piece 20b pushes the pin 31 against the spring 30, driving the engine 5 in a low rotation state. When the load acting on the handling cylinder 11 increases due to a large amount of grain culm or wet grain culm being conveyed to the feed chain 12, the output side variable speed pulley 20 resists the belt tension and the movable pulley Piece 20b is slope 23a of fixed boss 23
While rotating relative to
Accordingly, the movable pulley piece 17b of the input pulley 17 slides against the spring 22, reducing its effective diameter, and enters a deceleration state, that is, a high torque state. Further, as the movable pulley piece 20b of the output side speed change pulley 20 slides, the pin 31 in contact with the outer circumferential surface 27 is pushed out by the spring 30 and pulls the accelerator link 7 via the wire 32, causing the engine Increase the rotation speed of 5. As a result, the effective diameter of the output speed change pulley 20 increases, so the rotational torque transmitted to the handling cylinder 11 is increased, and the deceleration caused by the high torque is reduced by the engine 5.
This is offset by increasing the number of rotations of the handling cylinder 11, so that rotation at a substantially constant number of rotations is transmitted to the handling cylinder 11 due to the rotational torque corresponding to the load.

As explained above, according to the present invention, the transmissions 17, 20, 21 are interposed in the power transmission line, the transmissions are operated by the load acting on the handling cylinder 11, and the transmissions are operated by the load acting on the handling cylinder 11. Related engine 5
When the load acting on the handling cylinder increases, the transmission is decelerated and the rotational torque is increased.
Since it was configured to increase engine rotation,
Rotational torque corresponding to the load is transmitted to the handling cylinder,
This prevents the processing material from clogging the handling chamber and making it impossible to thresh, and improves work efficiency by eliminating the troublesome work of removing clogs.It also maintains a nearly constant rotational speed regardless of the load acting on the handling cylinder. The handling barrel can be rotated to maintain stable threshing performance.
Furthermore, only when a large load is applied to the handling cylinder,
Since the engine speed automatically increases, the engine speed can be reduced during light loads or normal work, saving fuel and reducing noise and vibration.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an outline of an embodiment of the present invention;
FIG. 2 is a sectional view taken along the - line. 5... Engine, 6... Threshing machine, 11... Handling cylinder, 7... Accelerator link, 17, 20, 21...
...Continuously variable transmission, 23...Boss, 23a...Slope, 26...Movable pulley piece boss, 31...Pin,
32...Wire.

Claims (1)

[Scope of utility model registration request] In a threshing machine having a handling cylinder to which power is transmitted from an engine, a transmission is interposed in the power transmission path to the handling cylinder, the transmission is operated by a load acting on the handling cylinder, and the transmission is operated. A handling cylinder drive device configured to increase rotational torque and engine rotational speed by changing the speed of a transmission when the engine is operated in connection with the handling cylinder and the load acting on the handling cylinder increases.