JP2002305943A - System for driving front treating part in combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system for driving a front treating part in a combine harvester, hardly causing conveyance disorder such as scattering of culms even when a machine body is stopped after carrying out the reaping operation at the edge of a headland, and restarted rearward. SOLUTION: A reverse speed-maintaining means for maintaining the driving speed of the front treating part 17 at a previously set speed at the time of reverse movement of the machine body including the stopping is installed in the side of a speed synchronizing means for synchronously changing the driving speed of the front treating part 17 with the traveling speed, in the combine harvester constituted so that the output power from an engine 1 may be branched to a traveling transmission system and a front treating transmission system transmitting the power to the front treating part 17 for carrying out operations including the conveyance of grain culms, and having a driving speed- changer 8 for driving the traveling device, and a front treating speed-changer 16 for driving the front treating part 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a pre-processing drive system in a combine.

[0002]

2. Description of the Related Art Conventionally, as a pre-processing drive system in a combine, an output from an engine is divided into a driving power transmission system and a pre-processing power transmission system to a pre-processing unit including grain culm conveyance, and a driving transmission for driving a driving device. And a pre-processing transmission for driving the pre-processing section, and a speed interlocking means for changing the driving speed of the pre-processing section in conjunction with the traveling speed is known.

At this time, the traveling speed of the body is set to a predetermined value so that the driving of the pre-processing unit does not unnecessarily decrease with the decrease in the traveling speed of the body and the cutting operation is not hindered. When the speed is lower than the speed, the speed interlocking means can be configured so that the driving of the preprocessing unit is continuously maintained at a predetermined driving speed.

[0004]

However, in the continuous maintenance of the driving of the pre-processing section, for example, in the case of a cutting operation on a headland, when the cutting operation is performed until the headland, the body is stopped, and then the vehicle is moved backward, There is a drawback that turbulence such as spilling of the culm may occur.

[0005]

A pre-processing drive system in a combine according to the present invention for solving the above-mentioned problems is as follows.
The output from the engine 1 is branched into a traveling transmission system and a preprocessing transmission system to the preprocessing unit 17 including grain culm transport, and a traveling transmission 8 for driving the traveling device and a preprocessing transmission for driving the preprocessing unit. And a speed interlocking means for changing the driving speed of the pre-processing unit 17 in conjunction with the traveling speed. The speed interlocking means controls the traveling speed of the body to a predetermined speed (speed maintenance control start speed). In a device that keeps driving the pre-processing unit 17 at a predetermined driving speed (maintenance speed) when it is smaller, the driving speed of the pre-processing unit 17 is determined in advance by the speed interlocking means at the time of reverse movement including stopping of the aircraft. The first feature is that reverse speed maintaining means for maintaining the set speed is provided.

A second feature is that a switching means 53 for turning on and off the operation of the reverse speed maintaining means is provided.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a transmission system diagram of a combine employing a grain culm conveying transmission device in a combine according to the present invention. A drive shaft (output shaft) 1a of an engine 1 has two pulleys for taking out output. A few are attached.
The driving force from the engine 1 is transmitted via a pulley 2 to a traveling hydraulic transmission device HST4 as a traveling transmission system,
The output is branched to a handle cylinder input shaft 7 for transmitting a driving force to the handle cylinder 6 as a working machine transmission system via the pulley 3.

A transmission for traveling transmission (traveling transmission) having the traveling HST 4 described above.
8, the driving force for the left and right traveling devices is shifted and output, whereby the left and right traveling devices are driven to change the speed, so that the vehicle body can be shifted and travels.

On the other hand, between the pulley 3 on the engine 1 side and the pulley 9 attached to the handle cylinder input shaft 7, a driving force transmitting belt 11 is wound. Is provided as a threshing clutch 12. That is, the driving force is transmitted to the working machine transmission system from the engine 1 via the threshing clutch 12 so as to be freely connected and disconnected.

The driving force of the working machine transmission system input to the handle cylinder input shaft 7 via the threshing clutch 12 is transmitted to the working machine transmission transmission (work) through a pulley 13 attached to the handling cylinder input shaft 7. Machine transmission) 14
Is transmitted to a working machine HST16 (input pulley 15 of the working machine HST16), which is a hydraulic transmission device provided in the machine, and a transmission system from the working machine transmission 14 to the pre-processing unit 17 in the combine, and a transmission system to the threshing feed chain 18 The transmission system is branched and output.

At this time, the working machine transmission 14 has a pre-processing output shaft 19 for outputting a driving force to the pre-processing unit 17.
And a feed chain output shaft 21 for outputting a driving force to the threshing feed chain 18. The threshing feed chain 18 is connected to a sprocket 22 provided at an end of the feed chain output shaft 21. It is driven by. In addition, the handling cylinder 6 is driven by inputting a driving force directly from the handling cylinder input shaft 7 via the bevel gear 23 (not through the transmission).

That is, the work machine transmission system includes a transmission system to the threshing unit 24 (transmission of driving force to the handling cylinder 6 and the threshing feed chain 18), and transmission of the driving force to the threshing unit 24 is performed by the work machine transmission 14. With the transmission of the driving force to
The work machine power transmission system is connected and disconnected by a threshing clutch 12 provided on the upstream side of transmission to the work machine transmission 14 in the work machine transmission system.

On the other hand, the pre-processing unit 17 is provided with a grain culling device (cutter) 41, a raising device 42, and a grain culm conveying device such as a star wheel and a handling unit 43 as in the prior art.
The transmission of the driving force to 7 is wound around a pulley 27 attached to the input shaft 26 of the driving force of the pre-processing unit 17 and a pulley 28 attached to the output shaft 19 of the pre-processing. This is performed via a transmission belt 29.

The pre-processing unit 17 has an input shaft 26 as in the prior art.
Each of the above mechanisms is driven at a drive speed corresponding to the rotation speed (speed) of the drive force by the drive force input to the drive mechanism. The pre-processing unit 24 is provided on the belt 29 side.
A tension clutch that connects and disconnects transmission of the driving force to the (input shaft 26) is provided as the pre-processing clutch 31.

As described above, the "disengagement" of the pre-processing clutch 31 is performed.
In this state, when the threshing clutch 12 is turned on, a driving force is input from the engine 1 to the handle cylinder input shaft 7 and the handle cylinder 6 is stopped while the preprocessing unit 17 is stopped.
Then, the threshing feed chain 18 is driven, and the pre-processing clutch 31 is turned on, whereby the driving force is transmitted to the pre-processing unit 17 and the pre-processing unit 17 (each of the above mechanisms) is driven.

At this time, the work machine transmission 14 is integrally formed with the work machine HST16 as shown in FIGS. 2 and 3, and is structured to be shifted by the work machine HST16. The pre-processing output shaft 19 and the feed chain output shaft 21 are located downstream (downstream) of the work machine HST16.
It is provided in.

That is, the work machine transmission 14
The gear G1 supported on the output shaft 16a of the work machine HST16 meshes with the gear G2 supported on the pre-processing output shaft 19, and the gear G supported on the pre-processing output shaft 19.
3 and a gear G4 rotatably supported on the output shaft 16a.
And a sprocket P1 rotatably supported by the output shaft 16a so as to freely rotate and integrally rotate with the gear G4, and a sprocket P2 rotatably supported by the feed chain output shaft 21 through the chain C. It is a transmission-connected structure.

At this time, a torque limiter mechanism 20 is interposed between the feed chain output shaft 21 and the sprocket P2. As a result, the driving forces from the preprocessing output shaft 19 and the feed chain output shaft 21 are both the work equipment HST
16, that is, the drive speeds of the feed chain 18 and the preprocessing unit 17 are synchronously shifted by the work implement HST16. When the threshing clutch 12 is turned off, the driving force to the handle cylinder input shaft 7 is cut off, so that the pre-processing unit 17, the handle cylinder 6, the threshing feed chain 1
8 are stopped and not driven.

On the other hand, a driving force is input to the traveling HST 4 from the engine 1 side to the traveling transmission 8, and the driving force shifted by the traveling HST 4 is transmitted via a sub-transmission mechanism 32 provided on the traveling transmission 8 side. Thus, the sub-shift is performed and output to the traveling device side.

That is, a main transmission lever 33 for operating the traveling HST 4 to shift the output from the traveling HST 4 and a sub transmission lever (not shown) for operating the sub transmission mechanism 32 are attached to the traveling transmission 8. The traveling speed of the aircraft is changed by shifting the traveling driving force toward the traveling device by operating the main transmission lever 33 and the sub transmission lever.

At this time, the sub-transmission mechanism 31 is provided with an auxiliary transmission output shaft 34 for outputting a sub-shifted driving force (a driving force after a speed change operation). The sensor 36 is attached, and the sub-transmission output shaft 3
4 can be detected. Further, the pre-processing output shaft 19 of the work implement transmission 14 has a rotation speed of the pre-processing output shaft 19 (the pre-processing unit 1).
7) is provided.

Further, on the side of the gear shift trunnion shaft (not shown) of the work implement HST14, as shown in FIG. 1, the trunnion shaft (swash plate angle of the work implement HST14) is operated to shift the work implement HST14. An actuator (motor) 39 for performing an operation is integrally attached to the work implement HST14. Further, as shown in FIG.
6 and 37 are input to the microcomputer unit 38 as a control device, and the motor 39 is connected to the microcomputer unit 3.
8 is connected to the output side.

The microcomputer unit 38 controls the motor 3 based on information from the rotation sensors 36 and 37.
9 and the preprocessing unit 17 (preprocessing output shaft 19) and the threshing feed chain 18 (feed chain output shaft 21)
The driving speed of the pre-processing unit 17 is automatically changed in synchronization with the driving speed by synchronizing with the running speed.

In the work traveling, the amount of the harvested stick per predetermined unit time is increased or decreased in accordance with the traveling speed, and the processing of the seed rod to be processed by the pre-processing unit 17 per the predetermined unit time is performed. Since the amount changes, the preprocessing unit 17 (the cutter 41, the raising device 4)
2, the handling depth transport body 43).

Therefore, the microcomputer unit 38 uses the traveling speed information from the traveling rotation sensor 36 to execute
7 is controlled by the motor 39 by monitoring information from the pre-processing rotation sensor 37 so as to drive the motor 7 at a driving speed that ensures a processing amount corresponding to the traveling speed, and controlling the shift of the work machine HST 16 by the motor 39. The driving speed of the preprocessing unit 17 is changed in conjunction with the running speed so that the driving speed is changed. That is, the speed interlocking means for changing the driving speed of the pre-processing unit 17 in conjunction with the traveling speed includes the motor 39, the microcomputer unit 38, the pre-processing rotation sensor 37, the traveling rotation sensor 36, and the like.

As shown in FIG. 5, when the running speed is equal to or higher than the predetermined low speed (speed maintaining control start speed) V1, the microcomputer unit 38 (speed interlocking means) performs the pre-processing in proportion to the running speed. When the driving speed is increased and the traveling speed becomes equal to or lower than the speed maintenance control start speed V1 (including 0) and when the vehicle travels backward, the driving of the preprocessing unit 17 is continued while maintaining the predetermined low speed (maintenance speed) V2. It is configured to be.

The above-mentioned speed interlocking means, when the running speed becomes lower than the speed maintaining control start speed V1 as described above,
Although the driving of the preprocessing unit 17 is configured to be continued at a fixed speed V2, the driving may be set so that V1 is substantially zero or zero. Further, the maintenance speed V2 is a speed at which the combine can perform the reaping and conveying work.

The work machine transmission 14 is
With the above-described structure, the pre-processing output shaft 19 and the feed chain output shaft 21 are driven so that the feed chain 18 is driven at a predetermined speed ratio with respect to the driving speed of the pre-processing unit 17.
And the driving force (rotational speed) ratio is set.

With the above structure, the output rotation direction of the working machine HST16 may be only one direction (forward rotation), that is, the mechanism can be realized only by the forward rotation, and the reverse rotation is unnecessary. Rather, the pre-processing unit 17 and the feed chain 18 operate in the reverse direction due to the reverse rotation of the work machine HST16, so that it is necessary to prevent this, that is, it is necessary to regulate the reverse rotation of the work machine HST16.

For this reason, the working machine HST16 has a structure as shown below, and restrictions such as reverse rotation are imposed. That is, as shown in FIG.
Reference numeral 6 denotes a variable displacement hydraulic pump 16P rotated and driven by the driving force from the engine 1 and a hydraulic motor 16M connected to the hydraulic pump 16P in a closed circuit.
And a charge pump 16 for replenishing oil in the closed circuit.
C, so that the charge pump 16C is driven integrally with the hydraulic pump 16P.

In the closed circuit, a hydraulic motor 16M
Forward or reverse pressure oil from the hydraulic pump 16P that rotates the motor forward or reverse to the hydraulic motor 16M side.
A bypass path 66 is provided to bypass M and return to the hydraulic pump 16P side (the input side of the hydraulic pump 16P). The bypass path 66 sends forward pressure oil from the hydraulic pump 16P to the hydraulic motor 16M side. It is provided between a forward rotation path pipe 67 and a reverse rotation path pipe 68 for feeding reverse pressure oil from the hydraulic pump 16P to the hydraulic motor 16M side.

When the forward pressure oil is supplied from the hydraulic pump 16P to the hydraulic motor 16M via the forward path pipe 67, the hydraulic motor 16M is rotated forward by the forward pressure oil, and the forward pressure oil is supplied from the hydraulic motor 16M. Drained oil is returned to the hydraulic pump 16P through the reverse rotation path pipe 68, and reverse pressure oil is transferred from the hydraulic pump 16P to the hydraulic motor 16P through the reverse rotation path pipe 68.
M, the hydraulic motor 16
M is rotated in the reverse direction, the oil drained from the hydraulic motor 16M is returned to the hydraulic pump 16P via the forward rotation path pipe 67, and the hydraulic motor 16M is driven to rotate as described above.

On the other hand, the detour path 66 is provided between the reverse detour path pipe 69 connected to the reverse path pipe 68 and the forward detour path pipe 71 connected to the forward path pipe 67.
The pressure oil is unconditionally supplied from the reverse rotation path pipe 68 to the normal rotation path pipe 67, and the pressure oil is transmitted from the normal rotation path pipe 67 to the reverse rotation path pipe 68. Only when the pressure oil becomes equal to or higher than a predetermined oil pressure, the forward rotation regulating valve 72 is opened to feed the pressure oil.

That is, the forward rotation restricting valve 72 is a check-and-high pressure relief valve, and sends the pressure oil (reverse pressure oil) in one direction (from the reverse rotation path pipe 68 side to the normal rotation path pipe 67 side). Oil is allowed, and the supply of pressure oil (forward rotation pressure oil) in the opposite direction (from the forward rotation path pipe 67 side to the reverse rotation path pipe 68 side) is performed when the hydraulic pressure of the forward rotation oil is equal to a predetermined hydraulic pressure (forward rotation). (Passing pressure on the detour path) or more.

The output of the charge pump 16C is connected to a reverse rotation bypass pipe 69, so that the supply pump 16C can supply replenishing oil to the reverse rotation pipe 68 and the normal rotation pipe 67. ing.

With the above structure, the hydraulic motor 16M is driven in the normal rotation direction, and the pre-processing unit 17 and the feed chain 18
Is normally operating, as shown in FIG. 6, the forward rotation pressure oil from the hydraulic pump 16P is sent to the hydraulic motor 16M via the forward rotation path pipe 67, and the forward rotation driven hydraulic motor 16M is driven. Is returned to the hydraulic pump 16P via the reverse path pipe 68, and the replenishing oil is supplied by the charge pump 16C via the reverse bypass path pipe 69 to the reverse path pipe 6
8 and is sent to the hydraulic pump 16P together with the drainage.

On the other hand, if reverse rotation pressure oil is erroneously supplied from the hydraulic pump 16P to the hydraulic motor 16M via the reverse rotation path pipe 68, as shown in FIG.
8 is fed to the hydraulic motor 16M side by the resistance of the hydraulic motor 16M side when the hydraulic motor 16M is rotated, and is not sent to the hydraulic motor 16M side. The hydraulic pump 16 is sent to the forward rotation path pipe 67 via the reverse rotation path pipe 71,
Returned to P.

That is, the reverse rotation pressure oil bypasses the hydraulic motor 16M via the bypass path 66 and is returned to the hydraulic pump 16P. The reverse rotation pressure oil does not reversely rotate the hydraulic motor 16M. Regulations are enforced. Thus, the reverse rotation of the hydraulic motor 16M (working machine HST16) can be performed with the above-described simple configuration without providing a one-way clutch or the like in the reverse rotation bypass path that returns the reverse pressure oil to the hydraulic pump 16P by bypassing the hydraulic motor 16M. Rotation can be regulated.

On the other hand, the pre-processing unit 17 and the feed chain 18
In case of abnormal stop due to clogging of straw, hydraulic motor 16M
Is stopped (locked), and the hydraulic pressure of the forward rotation pressure oil in the forward rotation path pipe 67 increases, and the hydraulic pressure is higher than the hydraulic pressure of the normal rotation pressure oil (when the pre-processing unit 17 and the feed chain 18 are operating). High abnormal pressure.

For this reason, in the present embodiment, the pressure passing through the normal rotation bypass path is set to be substantially the same as the abnormal pressure, whereby the normal rotation restricting valve 72 functions as a torque limiter. When the processing unit 17 and the feed chain 18 are abnormally stopped, the forward rotation restricting valve 72 is opened as shown in FIG. Since the 16M is locked, it is sent from the forward detour path pipe 71 to the forward rotation restricting valve 72, and the forward rotation restricting valve 72 is opened, sent from the reverse detour path pipe 69 to the reverse rotation path pipe 68, and the hydraulic motor 16M is turned on. The hydraulic motor 16M is returned to the hydraulic pump 16P by detour, and the normal rotation of the hydraulic motor 16M is stopped.

As described above, the bypass path 66 supplies the reverse rotation pressure oil from the reverse rotation path pipe 68 to the normal rotation path pipe 67 by the hydraulic motor 1.
6M, always return to the input side of the hydraulic pump 16P unconditionally, and regulate the reverse rotation of the hydraulic motor 16M in the reverse rotation bypass path and forward rotation oil from the forward rotation path pipe 67 to the reverse rotation path pipe 68.
When the hydraulic pressure of the forward rotation pressure oil exceeds the pressure passing through the forward rotation bypass path by bypassing the hydraulic motor 16M, the hydraulic pump 16P is returned to the input side and the forward rotation bypass path that regulates the forward rotation of the hydraulic motor 16M is also used. It has become.

That is, in the present embodiment, it is not necessary to drive the hydraulic motor 16M in the reverse direction.
Only when the oil pressure of the reverse pressure oil exceeds a predetermined pressure in the (reverse bypass route), the reverse pressure oil is allowed to pass through the reverse bypass route,
Hydraulic pump 1 by reversing the reverse pressure oil through hydraulic motor 16M
The reverse rotation restricting valve returning to the input side of the 6P, the above-described one-way clutch, and the like are not required, and the reverse detour path can be constituted by a simple pipe such as the reverse detour path pipe 69. Can be simple.

Since the reverse rotation of the hydraulic motor 16M is always unconditionally restricted, the reverse rotation of the hydraulic motor 16M can be surely restricted. On the other hand, since the normal rotation restricting valve 72 functions as a torque limiter as described above, the driving of the preprocessing unit 17 and the like is stopped when the preprocessing unit 17 and the like stop abnormally. In addition to preventing damage, the pre-processing unit 17 and the feed chain 1
8 can be easily removed.

On the other hand, the control of the microcomputer unit 38 is provided with an engine stop means (function) for urgently stopping the operation of the engine 1 and, as shown in FIG. Rolling path pipe 67
Pressure sensor 7 provided on the side to detect the hydraulic pressure of the forward rotation pressure oil
3 is connected, and the engine stop means is configured to stop the engine 1 when the oil pressure of the forward rotation pressure oil exceeds a predetermined engine stop pressure based on information from the oil pressure sensor 73.

This prevents the hydraulic pressure of the forward rotation oil from unnecessarily increasing due to an abnormal stop of the pre-processing unit 17 or the feed chain 18 and shortens the life of hydraulic equipment such as the working machine HST16. Or the hydraulic equipment is prevented from being damaged. Note that the engine stop pressure is set to be smaller than the pressure passing through the forward rotation bypass path, and the hydraulic motor 16
When the engine M is locked, the engine 1 is first stopped by the engine stop function. However, if the engine stop function does not operate due to a failure or the like, the hydraulic motor 16
The forward rotation restricting function for restricting the forward rotation of M and stopping the operation of the work machine HST16 is activated.

That is, the engine 1 is stopped by the engine stop function, or the output of the work machine HST 16 is stopped by the forward rotation restricting function.
The 8 side or the hydraulic equipment and the like are not easily damaged. Further, depending on the case, only one of the engine stop function and the above-described forward rotation restricting function on the work implement HST16 side may be provided.

With the structure described above, the driving speed of the pre-processing unit 17 is changed by synchronizing (following) the running speed, and the cutting of the culm and the transport of the cereal stem to the downstream side are smoothly performed in accordance with the running speed. And feed chain 18
However, the driving speed is changed following the change in the driving speed of the pre-processing unit 17, so that the grain rod conveyed by the handling depth conveying body 43 of the pre-processing unit 17 can be smoothly received and conveyed to the handling cylinder 6 side. it can.

At this time, the pre-processing unit 17 and the feed chain 18 are driven by the same transmission (working machine transmission 14), and the driving speed is always synchronized. Is prevented from being disturbed.

On the other hand, since the working machine transmission 14 is constituted by using the working machine HST 16, a common working machine HST 16 is arranged on the input side of the pre-processing unit 17 and the threshing feed chain 18, and the working machine transmission In addition to the compact structure on the 14 side, not only the traveling device, but also the pre-processing unit 17 and the threshing feed chain 18 are steplessly shifted. Conveyance disturbance can be smoothly prevented.

The driving force of the pre-processing unit 17 and the threshing feed chain 18 is synchronously output from the working machine transmission 14 disposed downstream of the threshing clutch 12, and the driving force of the handling cylinder 6 is also reduced. The pre-processing unit 17, the threshing feed chain 18, the handling cylinder 6, etc. are stopped by setting the threshing clutch 16 to the "disengaged" state, and the pre-processing is performed when the threshing unit 6 is stopped. A check device for stopping or not driving the portion 17 is not required, and the structure can be simplified.

On the other hand, the pre-processing clutch 31 is disposed on the downstream side of the transmission of the working machine transmission 14 (the pre-processing output shaft 19 of the working machine transmission 14 and the input shaft 26 of the pre-processing section 17).
In the state where the threshing clutch 12 is engaged and operated, the work implement HST16 is in a driving (rotating) state.

For this reason, when the pre-processing clutch 31 is turned on, the hydraulic pump 16P for rotating the hydraulic motor 16M by inputting the rotational driving force of the work machine HST16 is already rotating, and the charge pump 16C (along with the hydraulic pump 16P). A pump for replenishing oil that leaks between the hydraulic pump 16P and the hydraulic motor 16M) is rotated.

As a result, the load on the side of the charge pump 16C at the time of the engagement operation of the pre-processing clutch 31 is small, the high pressure is not generated in the charge pump 16C, and the charge pump 16C has already been rotated. Problems can be prevented and the durability of the hydraulic equipment (HST) can be improved.

In the case of this embodiment, both the traveling transmission 8 and the work implement transmission 14 are H
ST is used as a transmission, and HS
T (working machine HST16) is electronically controlled and the working machine transmission 14 is automatically shifted, so that the speed interlocking means has high followability to the running speed, and the running HST4 or the working machine HST16 has oil temperature and pressure. Even when a change in volumetric efficiency occurs due to the above, the running speed and the driving speed of the preprocessing unit 17 are accurately synchronized.

Further, as described above, the microcomputer unit 38 controls the driving speed maintaining means (continuing the driving of the preprocessing unit 17 while maintaining the speed V2 when the traveling speed is equal to or lower than the predetermined low speed V1 and the vehicle moves backward. Function), the mowing operation is performed, for example, to the vicinity of the headland, and when the vehicle is stopped or moved backward by the main speed change (travel HST4), the preprocessing unit 17, the feed chain 18, the handling cylinder, 6 continues.

That is, the speed maintaining function also has a function of a reverse speed maintaining means for continuing the driving of the pre-processing unit 17 while maintaining the speed V2 even when the aircraft is moving backward, thereby providing a grain movement. It is possible to prevent the culm from being left uncut and not being transported, so that it is possible to prevent turbulence in harvesting and transporting the grain culm such as spilling of the culm. In addition, it is possible to prevent the disadvantage that the driving speed of the preprocessing unit 17 is reduced more than necessary and the harvesting operation is not sufficiently performed, so that the stock is pulled out or pushed off.

On the other hand, in the control of the microcomputer unit 38, a speed maintenance canceling means (function) for stopping (cancelling) the driving speed maintaining function is provided, and as shown in FIG. Unit 3
Forced scraping release switch 53 connected to the input side of 8
By operating (ON, OFF), the operation of the speed maintenance cancel function and the non-operation (actuation of the driving speed maintenance function) can be set.

That is, the speed maintaining canceling function is activated by turning on the forcible release switch 53, and as shown in the graph of FIG. When the speed is equal to or lower than the low speed (near stop speed) V3 and the vehicle is in the reverse traveling state, the work machine HST16 is set to neutral, and the pretreatment unit 17 and the threshing feed chain 18 can be stopped.

Thus, during normal mowing and threshing work (row mowing), the forced raking release switch 53 is turned on to activate the speed maintenance canceling function. When the running speed becomes 0 or less than the near stop speed V3 and the vehicle is in reverse, preprocessing is performed. By stopping the section 17 and the threshing feed chain 18, for example, when threshing clogging occurs and the handling cylinder 6 is stopped, the pre-processing section 17 and the threshing feed chain 18 are stopped by stopping the machine body. It can be stopped and clogging can be easily removed.

Further, since the pre-processing unit 17 and the threshing feed chain 18 are stopped, the waste is not discharged to the rear side of the machine body when turning at the time of heading or the like. Inconvenience such as stepping on is prevented.
Unnecessary scraping of uncut culms is also prevented.

On the other hand, the above-mentioned pre-processing unit 17 is vertically movable as in the prior art.
A pre-processing height potentiometer 44 for detecting the height of the microcomputer is attached, and information from the potentiometer 44 is input to the microcomputer unit 38 as shown in FIG.

When the pre-processing unit 17 is raised to a predetermined height set in advance by the information from the potentiometer 44, the work unit HST16 is operated by the motor 39 to operate the work unit HST.
An automatic stopping means (function) for setting the output of T16 to 0 and stopping the driving of the preprocessing unit 17 and the threshing feed chain 18 is provided.

Thus, for example, when the pre-processing unit 17 is raised at the time of turning around at the time of heading or the like, the automatic stop function is activated by raising the pre-processing unit 17 to a predetermined height, and the pre-processing unit 17 and the threshing feed Since the driving of the chain 18 is stopped, the discharging of the straw or the like is not performed. For this reason, the straw or the like does not drop to the turning place, and the inconvenience such as the body stepping on the straw at the time of turning is prevented. At this time, as described above, the pretreatment unit 17 and the threshing feed chain 18
Since the drive of the motors stops synchronously, transport disturbance and clogging of grain stalks are prevented.

When the pre-processing unit 17 is lowered from the above-mentioned raised state, when the pre-processing unit 17 is lowered below the set height, the automatic stop function is released and the microcomputer unit 38 is driven by the motor 39.
, And the pre-processing unit 17 and the threshing feed chain 18 are driven again in synchronization with the traveling speed, so that cutting, transporting, and the like are restarted.

As shown in FIG. 4, a lift-shut release switch 46 is also input to the microcomputer unit 38. When the lift-shut release switch 46 is
In the state of N, the operation of the automatic stop function is stopped, whereby the lift shut release switch 46 is turned off.
In the case of N, even if the pre-processing unit 17 is raised to the set height, the pre-processing unit 17 and the threshing feed chain 18
Is continued.

However, the microcomputer unit 38 also receives a main sensor 47 of the handling depth transporter 43 which detects whether a culm is contained in the pre-processing unit 17. According to the information to the side, even when the lift shut release switch 46 is ON, when the pre-processing unit 17 finishes flowing the culm, a driving stop means (function) for stopping the driving of the pre-processing unit 17 and the threshing feed chain 18 is provided. Provided.

That is, when the microcomputer unit 38 detects that the main sensor 47 is turned off and the culm is finished flowing after raising the pre-processing unit 17 by the drive stop function, the microcomputer 39 drives the motor 39 to output the output of the work machine HST16. Is set to 0, the driving of the pre-processing unit 17 and the threshing feed chain 18 is stopped, and unnecessary driving is prevented.

On the other hand, the pulley 2 and the input pulley 4 of the traveling HST
8, a main clutch 51 is provided, and by disengaging the main clutch 51, transmission of the driving force to the traveling device side (traveling transmission system) can be cut off, and the aircraft can be stopped. Has become.

At this time, a sensor (safety switch) 52 for detecting a depression operation of the clutch pedal (disengagement operation of the main clutch 51) is provided on the side of the traveling clutch pedal for operating the main clutch 51. The information from 52 is input to the microcomputer unit 38. When the safety switch 38 is turned on (when the clutch pedal is depressed), the microcomputer 39 drives the motor 39 so that the work implement HS
The output of T16 is set to 0 (neutral), and the preprocessing unit 17
An operation stopping means (function) for stopping the driving of the threshing feed chain 18 is also provided.

When depressing the clutch pedal,
The main shift lever 33 is also forcibly returned to neutral, and the output of the traveling HST4 is also switched to 0 (neutral). Thus, the operator can depress the traveling clutch pedal and disengage the main clutch 51 to stop the machine in an emergency manner, so that the emergency stop operation is easy and the emergency stop can be reliably performed.

By the way, in the cutting operation in the state where the uncut kernels are lying down, it is necessary to increase the driving speed of the pre-processing unit 17 in terms of the performance of the cutting. That is, in the case of this combine, the drive speed of the pre-processing unit 17 set by the speed interlocking unit is increased with respect to the side high speed as described above by increasing the proportional coefficient of the driving speed of the pre-processing unit 17 with respect to the traveling speed. There is a need.

For this reason, in the present embodiment, the control of the microcomputer unit 38 includes the preprocessing unit 17 for the traveling speed.
The microcomputer unit 38 is provided with a speed increasing means (function) for increasing the drive speed of the microcomputer unit 38 by turning on and off a fall switch 58 connected to the microcomputer unit 38 as shown in FIG. It is configured to set on / off.

When the combine of the present embodiment is used for cutting and threshing of the lodging culm, the operator turns on the lodging switch 58 manually (manually) to activate the speed increasing function, and FIG. As compared with the driving speed S1 (dotted line in FIG. 9) similar to that in FIG. 5, the pre-processing unit 17 is driven at a high speed S2 (solid line in FIG. 9) with respect to the traveling speed. Can be easily and stably cut. When the fall switch 58 is turned off, the pre-processing unit 17 is driven at the speed of S1.

The feed chain 1 from the pre-processing unit 17
The driving speed of the pre-processing unit 17 at which the grain culm conveyed to the 8 side has an appropriate posture varies depending on material conditions (such as the angle of erection of the rice and stiffness of the culm), field conditions, and the like. When the pre-processing unit 17 is driven at a preset driving speed (standard speed) by a speed interlocking unit or a speed increasing function, disturbance in grain culm conveyance such as a head or a stock former may occur.

In order to avoid this inconvenience, in the present embodiment, the control of the microcomputer unit 38 is performed by changing the speed ratio (the above-mentioned proportional coefficient) of the driving speed of the pre-processing unit 17 to the traveling speed. A speed changing means (function) for changing the speed from the standard speed is provided, and the microcomputer unit 38 switches the speed by switching a preprocessing speed changing dial switch 59 connected to the microcomputer unit 38 as shown in FIG. It is configured to set the turning on / off of the change function.

At this time, the preprocessing speed change dial switch 59 has a plurality of switching positions as shown in FIG. 10, and by switching to each position, the standard processing as shown in the graph of FIG. The drive speed is configured to increase or decrease with respect to the speed. That is, when the pre-processing speed change dial switch 59 is switched to the position 1, it is driven by the proportional coefficient of 1 in FIG.

As a result, when the driving speed of the pre-processing unit 17 is increased with respect to the traveling speed (standard speed), the head is advanced, and when the driving speed is decreased, the stock is advanced (the ear is delayed). In the case where the turbulence of the grain culm conveyance such as the former precedence occurs, the turbulence of the grain culm conveyance can be corrected by switching the preprocessing speed change dial switch 59 to an appropriate position. Note that a variable resistor (such as a volume) is used as the preprocessing speed change dial switch 59.
May be used to set the increase / decrease of the drive speed steplessly.

The pre-processing unit 17 of the feed chain 18
4, a camera 61 is connected to the input side of the microcomputer unit 38 as shown in FIG. 4, and a speed changing function is operated based on the posture of the cereal stem photographed by the camera 61, and the preprocessing is performed. The conveying posture of the grain stalk may be automatically corrected by adjusting the driving speed of the unit 17.

When the combine of the present invention is used for a manual operation, the traveling speed becomes 0, so that the speed maintenance canceling function is activated (the forced scraping release switch 53 is turned on) and the preprocessing section When the drive speed is 0 and the speed maintenance cancel function is not operated (the forced scraping release switch 53 is turned off), the drive speed maintenance function is operated and the drive speed of the preprocessing unit becomes V2.

That is, in the case of a manual operation, the driving speed of the feed chain 18 becomes 0 or a relatively low speed (V2).
Inability to work or worsens. In order to avoid this inconvenience, the microcomputer unit 38 of the present invention is provided with a handle speed increasing means (function), and the drive speed of the feed chain 18 during the hand handling operation is increased by the handle speed increasing function. It is configured so that the handling operation can be performed efficiently.

That is, as shown in FIG. 4, the microcomputer unit 38 has a manual operation switch 5 for detecting a manual operation state.
6 is connected, and the microcomputer unit 38 is configured to set ON / OFF of the manual handling speed increasing function by turning ON and OFF of the manual handling switch 56.

In this embodiment, as shown in FIG. 12, a clamping rail 62 for clamping the grain stalk together with the feed chain 18 and a front end of the clamping rail 62 are provided above the feed chain 18 as in the conventional case. At 62a, there is provided a cereal stem pressing rod 63 supported to be vertically swingable with respect to the feed chain 18, and the cereal stem pressing rod 6 is provided.
The position 3 can be freely switched between a manual operation position H that stands up with respect to the feed chain 18 and a normal operation position A where the front end falls down with respect to the feed chain 18.

In the case of the present embodiment, the hand switch 56 is provided on the side of the clamping rail 62, and when the grain culling rod 63 is switched to the standing posture (hand handling work position H), the grain culm is switched. This is turned on by the support unit 64 of the holding rod 63, and the microcomputer unit 38 is activated by operating the function of increasing the handling speed.

Further, on the pre-processing clutch 31 side, an actuator (pre-processing clutch motor) for turning on and off the pre-processing clutch 31 is connected to the output side of the microcomputer unit 38 as shown in FIG. The pre-processing clutch motor 57 is driven so that the on-off operation of the pre-processing clutch 31 can be automatically operated in addition to the manual operation described above.

When the handle 63 is switched to the manual operation position H and the manual operation switch 56 is turned on, the microcomputer unit 38 activates the manual operation speed increasing function, as shown in FIG. As a result, the driving speed of the pre-processing unit 17 when the running speed becomes equal to or lower than the predetermined speed is increased from the maintaining speed V2 to the manual handling maintaining speed V4 at which the manual handling operation can be performed efficiently. By driving the processing clutch motor 57, the pre-processing clutch 31 is turned off.

In this case, the feed chain 18 is driven at a speed corresponding to the preset handling speed V4 while the driving of the pre-processing unit 17 is stopped. Thereby, the handling operation can be performed efficiently without lowering the working efficiency at the time of the handling operation.

The microcomputer unit 38 responds to the operation of the speed maintenance canceling function by turning on / off the forcible squeeze release switch 53 and turning on / off the manual operation switch 56.
N and OFF are also checked, and when the manual switch 56 is ON, a speed maintenance cancel restricting means (function) that does not activate the speed maintenance cancel function even if the forced rake release switch 53 is ON is provided. Have been.

Thus, at the time of manual operation, the manual operation switch 56 is turned on, so that the speed maintenance canceling function is activated, and the speed maintenance cancellation function is activated (the forced scraping release switch 53 is ON). Even in this case, the speed maintenance cancel function is automatically stopped, and the disadvantage that the drive speed of the feed chain 18 becomes zero is automatically prevented.

[0089]

According to the structure of the present invention constructed as described above, the pre-processing unit is driven and maintained at the preset driving speed when the body stops and reverses by operating the reverse speed maintaining means. Therefore, for example, in the case of mowing work at the headland, even if the mowing work is performed up to the headland, and the aircraft is stopped and then moved backward, the pre-processing unit is continuously driven, so that culm spillage and the like may occur. This has the advantage that transport disturbances and the like are prevented.

By stopping the operation of the reverse speed maintaining means by the switching means, when the body stops and reverses, the driving of the pre-processing unit 17 is stopped, for example, threshing clogging occurs, and the handling cylinder 6 When the vehicle stops, the clogging can be easily removed. Further, since the driving of the pre-processing unit 17 is stopped at the time of reversing, no waste or the like is discharged to the rear side of the body, and Inconveniences such as stepping backward and stepping on the straw at the time of turning at the time are prevented.

[Brief description of the drawings]

FIG. 1 is a power transmission diagram of a combine.

FIG. 2 is a cross-sectional plan view of the work implement transmission.

FIG. 3 is a front view of a work implement transmission.

FIG. 4 is a block diagram of a microcomputer unit.

FIG. 5 is a graph showing a relationship between a traveling speed and a preprocessing driving speed.

FIG. 6 is a hydraulic circuit showing a flow of pressure oil during a normal operation of the work implement HST.

FIGS. 7 (a) and (b) are hydraulic circuits showing the flow of hydraulic oil when a counter pressure oil is delivered from a hydraulic pump of a work machine HST and when a hydraulic motor is locked.

FIG. 8 is a graph showing a relationship between a traveling speed and a preprocessing driving speed in a state where a speed maintenance cancel function is activated.

FIG. 9 is a graph showing a relationship between a traveling speed and a preprocessing driving speed in a state where a speed increasing function is activated.

FIG. 10 is a plan view of a preprocessing speed change dial switch.

FIG. 11 is a graph showing a relationship between a traveling speed and a pre-processing drive speed when a speed change function is activated.

FIG. 12 is a side view of a front end portion of the feed chain.

FIG. 13 is a graph showing a relationship between a traveling speed and a pre-processing driving speed in a state where a handling speed increasing function is activated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine 8 Traveling transmission (traveling transmission) 16 Preprocessing transmission (preprocessing transmission) 17 Preprocessing part 53 Forced scraping release switch (switching means)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2B076 AA03 DA05 DB08 DD02 EA01 EA06 EC09 ED06 3J053 AA01 AB01 AB33 DA06 DA11 DA21 EA01

Claims (2)

[Claims] An output from an engine (1) is branched into a traveling transmission system and a pre-processing transmission system to a pre-processing unit (17) including grain culm transport, and a traveling transmission (8) for driving a traveling device. When,
A pre-processing transmission (16) for driving the pre-processing unit is provided, and speed interlocking means for changing the driving speed of the pre-processing unit (17) in conjunction with the traveling speed is provided. In a device for maintaining the driving of the pre-processing unit (17) at a predetermined driving speed when the speed is lower than a predetermined speed set in advance, the pre-processing unit (17) is provided on the side of the speed interlocking means at the time of reverse movement including stopping of the aircraft. A) a pre-processing drive system in a combine provided with a reverse speed maintaining means for maintaining the drive speed of the preset speed. 2. The pre-processing drive system in a combine according to claim 1, further comprising a switching means (53) for turning on and off the operation of the reverse speed maintaining means.