JPH0240751Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a threshing stop device for a combine harvester, which is equipped with a reaping section, a threshing section, and a straw cutter, and continuously reaps and threshes grain culms.

``Prior Art'' Conventionally, as shown in Japanese Utility Model Application No. 170945/1983, there has been a technique of interlockingly opening and closing a threshing clutch and a straw cutter clutch.

"Problems to be Solved by the Invention" In the prior art, the threshing clutch and the straw cutter clutch were engaged or disengaged almost simultaneously by manual operation of a single lever. Even if it stops due to blockage, etc., the straw continues to be fed from the threshing section to the straw cutter until each of the clutches is disengaged by manual operation of the lever, and the threshing section on the upper side of the straw cutter, etc. However, there were problems in handling and safety, such as the tendency for straw to become clogged.

``Means for Solving the Problems'' However, the present invention is equipped with a cutter switch that detects the stoppage of the straw cutter due to overload operation such as straw clogging, and a threshing stop member that turns off the threshing clutch. The threshing stop device for a combine harvester is characterized in that the threshing stop member is automatically operated in conjunction with the straw cutter stop detection operation of the cutter switch during harvesting work.

``Function'' Therefore, when the straw cutter stops due to an accident such as straw clogging during harvesting, the cutter switch and threshing stop member automatically stop the threshing section, so that the operator can Even if the threshing section is not stopped by manual operation, the delivery of straw from the threshing section to the straw cutting cutter will be interrupted almost at the same time as the straw cutting cutter is stopped, and this will prevent the spread of straw clogging accidents in the straw cutting cutter and prevent the straw from getting stuck in the straw cutting cutter. It is possible to prevent accidents caused by straw clogging to the side threshing section, and it is possible to minimize accidents at the straw cutter at the rear of the machine, which cannot be easily seen by the operator in the operating position, compared to the conventional method. It is possible to easily improve handling operability and safety.

"Embodiments" Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Fig. 1 is a side view of the combine harvester, and Fig. 2 is a plan view of the same. In the figure, 1 is a truck frame to which a running drive transmission 2 is attached, and 3 is a drive sprocket installed on both sides of the truck frame 1 via a running drive sprocket 4. 5 is a machine base supported by the track frame 1; 6 is a threshing section with a feed chain 7 stretched on the left side and a handling cylinder 8 built therein; The cutting blade 12 and the grain culm conveying mechanism 13 are supported in front of the machine stand 5.
14 is a straw cutter facing the end of the straw removal chain 15; 16 is a straw collection table; 17
18 is an engine that drives each part of the combine; 18 is a paddy tank that faces the grain lifting cylinder 19 and stores the grain to be taken out from the threshing section 6; 20 is a driver's cab equipped with a driver's seat 21 and a driving operation section 22; Levers 23, 23 and reaping and threshing clutch levers 24, 25 are provided in front of the driver's seat 21, and
A traveling speed change lever 26 is installed inside the driver's cab 20 on the left side of the driver's seat 21 (a position opposite to the side where an operator gets on and off), and the grain culms are continuously harvested and threshed.

Further, as shown in FIG. 3, there is an input pulley 27 that drives the threshing section 6 and the straw cutter 14, and a counter pulley 2 that is constantly linked to the engine 17.
8, a drive belt 29 stretched between each pulley 27, 28, a tension pulley 30 which is a threshing clutch that is brought into contact with and separated from the belt 29 to control on/off of this transmission function, The tension arm 31 is provided with a tension arm 31 that freely supports a tension pulley 30, and the tension arm 31 is connected to the threshing clutch lever 25 via a clutch wire 32, and the lever 25 is placed in either the on or off position. In addition, a reversible motor 34 is provided as a threshing stop member for displacing the lever 25 to the off position, and one end of the coupling link 36 is attached to a swing arm 35 that is swing-driven by the motor 34. Connect pin 3
7 and the other end of the connecting link 36 is connected to the lever 25 through the elongated hole 38, and when the lever 25 is supported in the engaged position shown by the imaginary line in FIG. 3, the lever 25 can be manually operated. The swing arm 3 can be moved to the cutting position by the motor 34.
5. The lever 25 is configured to be movable to the off position by swinging.

Furthermore, as shown in FIG.
an engine switch 39 attached to the engine 17 to drive and stop the engine 17; and a threshing switch 40 turned on by the threshing lever 25 in the on position.
, a cutter switch 41 that is turned off in conjunction with the off operation of the straw cutter 14 by the cutter clutch lever and cutter safety clutch (not shown), and a lamp 42 that lights up to indicate that the cutter 14 has stopped; engine switch 3
9 and the threshing switch 40 are in the ON state, an engine stop relay 43 is energized in conjunction with the off operation of the cutter switch 41, and a reversible motor 44 is provided for supplying fuel to the engine 17 and controlling the stop, and the engine 17 is in the ON state. The drive power source 46 is connected to one terminal 44a of the motor 44 through the relay switch 45 of the engine switch 39 and the relay 43 which is in the OFF state, and the drive power source 46 is connected to one terminal 44a of the motor 44.
The other end of the motor 44 is connected to the power supply 46 or ground via a bistable switch 47a which is switched in conjunction with the completion of the supply and stop operations, and each switch 39, 45 is turned off by turning off the engine switch 39. Through the off operation of the cutter switch 41, the terminal 44a is connected to ground through the relay switch 45 to operate the motor 44, and the fuel supply to the engine 17 is interrupted to stop the engine 17. At the same time, upon completion of the stop operation, the bistable switch 47a is switched to ground connection to stop the motor 44,
By turning on each of the switches 39 and 41, the terminal 44a is connected to the power supply 46 to reverse the motor 44, and when the supply operation is completed, the bistable switch 47a is switched to the power supply 46 connection to stop the motor 44. , so as to supply this fuel to the engine 17 again. In addition, the bistable switch 47
One terminal 34 of the threshing stop motor 34 is connected to the threshing stop motor 34 via a bistable switch 47b that is switched in conjunction with the
A is connected to the drive power source 46 or ground, and the other terminal 34b of the motor 34 is connected to the power source 4 via a bistable switch 48 which is switched in conjunction with the completion of the clutch switching operation of the motor 34.
6 or ground, and the terminal 34a is connected to ground by switching each switch 47a, 47b when the fuel of the motor 44 is stopped, and the motor 34 is connected to the ground.
is activated, the threshing clutch lever 25 from the on position is moved to the off position to stop each part of the threshing section 6, and at the same time, upon completion of the switching operation, the bistable switch 48 is switched to the ground connection and the motor 34 is turned on. While the motor 44 is stopped, the terminal 34a is connected to the power source 46 by switching the switches 47a and 47b when the fuel supply to the motor 44 is resumed, and the motor 34 is reversely rotated.
At the same time, upon completion of the backward movement, the bistable switch 48 is connected to the power source 46 and the motor 44 is stopped.

As is clear from the above, it is equipped with a cutter switch 41 that detects the stoppage of the straw cutter 14 due to overload operation such as straw clogging, and a reversible threshing stop member that turns off the tension pulley 30 that is a threshing clutch. In the threshing stop device for a combine harvester provided with a motor 34, the motor 34 is automatically operated in conjunction with the straw cutter 14 stop detection operation of the cutter switch 41 during harvesting work.

The present invention is constructed as described above, and with both poles of each of the motors 34, 44 connected to the drive power source 46 as shown in FIG. When the engine 17 is operated with the engine switch 39 turned on and the engine switch 39 turned on, harvesting work can be carried out by turning on the threshing clutch lever 25, and harvesting can be done by turning the engine switch 39 off. The motor 44 then operates to stop the engine 17,
Each bistable switch 47a by the motor 44,
47b operates the motor 34 to displace the threshing clutch lever 25 to the off position,
When the drive belt 29 of the threshing section 6 is loosened and the engine switch 39 is turned on, the engine 17 is restarted by reversing the motor 44, and then the motor 34 is reversed to cause the coupling link 36 to move back.
Further, during harvesting work, when the straw removal cutter 14 is stopped due to overload operation due to an accident such as straw clogging, and the cutter switch 41 is turned off, the relay 43 is energized and the motor 4 is turned off.
4 is activated to stop the engine 17, and after the switches 47a and 47b are switched, the motor 34 is activated to displace the lever 25 to the OFF position, loosen the drive belt 29, and stop and hold the threshing section 6. When the cutter switch 41 is turned back on, the motors 44 and 34 are sequentially reversed, thereby causing the coupling link 36 to move back.

"Effects of the Invention" As is clear from the above embodiments, the present invention includes a cutter switch 41 that detects the stoppage of the straw cutter 14 due to overload operation such as straw clogging, and a threshing switch 41 that turns off the threshing clutch 30. In the threshing stop device for a combine harvester provided with a stop member 34, the cutter switch 41 is activated during harvesting work.
The system automatically operates the threshing stop member 34 in conjunction with the stop detection operation of the straw cutter 14, and when the straw cutter 14 stops due to an accident such as straw clogging during harvesting, the cutter Since the threshing section 6 is automatically stopped by the switch 41 and the threshing stop member 34, the straw cutter 1 can be removed even if the threshing section 6 is not stopped by manual operation by the operator.
Almost simultaneously with the stop of step 4, the straw cutter 1 is removed from the threshing section 6.
4 is interrupted, it is possible to prevent the escalation of the straw clogging accident in the straw removal cutter 14 and the spread of the straw clogging accident to the upper threshing section 6, and it can be easily confirmed by the operator at the operating position. Accidents caused by the straw cutter 14 at the rear of the machine can be minimized, and handling operability and safety can be easily improved compared to the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a side view of a combine harvester showing an embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is an explanatory diagram of the main parts of the combine harvester, and FIG. 4 is an electric circuit diagram thereof. 14... straw cutter, 30... tension pulley (threshing clutch), 34... reversible motor (threshing stop member), 41... cutter switch.

Claims (1)

[Scope of utility model registration request] Straw cutter 14 for removing straw due to overload operation due to straw clogging, etc.
In a combine threshing stop device, which is equipped with a cutter switch 41 that detects the stoppage of the straw cutter 14 and a threshing stop member 34 that turns off the threshing clutch 30, the cutter switch 41 detects the stoppage of the straw cutter 14 during harvesting work. A threshing stop device for a combine harvester, characterized in that it is configured to automatically operate a threshing stop member 34 in conjunction with the operation.