JP2001317619A - Continuously variable transmission control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability in assembling a sensor and to avoid generation of control error caused by incomplete adjustment of a position in a continuously variable transmission control device for inputting a detected value detected by a pulley position detecting sensor for detecting a position of a movable split pulley of a belt type continuously variable transmission to move and control the movable split pulley based on the detected value. SOLUTION: The detected value detected by a feed chain speed change sensor 42 for detecting the position of the movable split pulley 27b is inputted into a control device 44 of the belt type continuously variable transmission 25 for continuously changing speed of carrying operation speed of a threshing feed chain 16, and the movable split pulley 27b is moved and controlled based on the detected value. In this case, the control device 44 is provided with 'a mode for recording position change at maximum speed of feed chain' for setting a previously set maximum speed reference value again based on a value of the feed chain speed change sensor in moving the position at the maximum speed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a continuously variable transmission control device provided in a combine or the like.

[0002]

2. Description of the Related Art Generally, a detection value of a pulley position detection sensor for detecting a position of a movable split pulley of a belt-type continuously variable transmission is input to this type of continuously variable transmission control device, and a movable split control is performed based on the detected value. Some control the movement of the pulley.

[0003]

Conventionally, however, the reference value of the pulley position detection sensor is set in advance as a fixed value, and the actual detection value is made to correspond to the reference value based on the position adjustment when the sensor is assembled. For this reason, there is a possibility that a control error may occur based on a position adjustment defect, without being inferior in workability at the time of assembling the sensor.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve these problems in view of the above situation, and detects the position of a movable split pulley of a belt type continuously variable transmission. A continuously variable transmission control device for inputting a detection value of a pulley position detection sensor to perform the movement control of the movable split pulley based on the detection value, wherein the continuously variable transmission control device has a preset pulley position detection sensor reference. A reference value reset mode for resetting a value based on a pulley position detection sensor value at the time of moving the reference position is provided. That is, since the position adjustment of the pulley position detection sensor becomes unnecessary, it is not permissible to improve the workability at the time of assembling the sensor, and it is also possible to avoid the occurrence of a control error due to a position adjustment failure. Further, the continuously variable transmission control device controls the continuously variable transmission of the threshing feed chain provided in the combine, and sets a maximum speed reference value of a pulley position detection sensor that detects a movable split pulley position of the continuously variable transmission, It is characterized by resetting based on the pulley position detection sensor value at the highest speed. That is, since the position adjustment of the pulley position detection sensor becomes unnecessary, it is not permissible to improve the workability at the time of assembling the sensor. Moreover, in the continuously variable transmission of the threshing feed chain, the work is frequently performed at the highest speed, so that even if there is a variation in the sensor value change characteristics, the reduction in the work accuracy due to the detection error is minimized. Can be suppressed.

[0005]

Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 is a combine, and the combine 1 is a pre-processing unit 2 for cutting stem culms, a threshing unit 3 for threshing grains from cut stems and culling, and selecting kernels. , A grain tank 4 in which is stored
The post-processing unit 5 for discharging the threshed culms, the operating unit 6 in which various operating tools are disposed, the running unit 7 including a pair of right and left crawler running bodies, and the like are configured. All are the same as before.

The pre-processing unit 2 includes a divider 8 for weeding uncut stems, a raising device 9 for raising the weeded stems, a cutting blade 10 for cutting the root position of the stems, and a cutting stem. It is composed of a first pretreatment transport device 12 for nipping and transporting the culm to a second pretreatment transport device (handling depth transport body) 11 to be described later. The raising device 9, the cutting blade 10, the first pretreatment Since the engine power is supplied to the transfer device 12 and the second pretreatment transfer device 11 via the traveling main transmission mechanism 13 (hydrostatic continuously variable transmission unit HST), the cutting of the stem and culm at a speed linked to the vehicle speed is performed. And transport is performed.

In the second pretreatment transport device 11, a stock transport chain 14 for transporting the stem side of the stem and culm, and a tip carrier 15 for transporting the tip side of the stem and culm are arranged side by side. , The entire second pretreatment transport device 11 is a handling depth motor (not shown)
Is forcibly rotated in the vertical direction about the transport end side as a fulcrum. That is, the second pretreatment transport device 11 is capable of moving the holding position up and down based on the forcible rotation when the stem and culm are inherited at the transport termination portion of the first pretreatment transport device 12, The handling depth in the threshing unit 3 can be adjusted by changing the pinching position of the stem and culm of the threshing feed chain (threshing and conveying device) 16 that takes over the stem and culm at the end of the second pretreatment transport device 11. I have.

On the other hand, the threshing unit 3 comprises a handling room 18 in which a handling drum 17 is installed and a sorting room 19 in which various sorting devices are installed. The handling room 18 receives the tip side of the stem and culm that the threshing feed chain 16 conveys along the handling room 18 and handles the tip side of the received stem and culm 17
Although the threshing process is performed with the rotation force of the above, since the engine power that does not pass through the traveling main transmission mechanism 13 is supplied to the handling cylinder 17 and various sorters, the speed according to the engine speed (the engine speed is usually Threshing and sorting are performed with the threshing process speed being substantially constant because it is fixed to the rated rotation.

The threshing feed chain 16 includes a threshing unit 3.
The stem is disposed in the front and rear direction on the outer side of the stem, and the stem and stem transferred to the terminal end of the second pretreatment transfer device 11 described above are inherited in a laterally oriented posture, and the stem side of the inherited stem and stem is removed. A drive case 22 that holds the drive sprocket 21 of the threshing feed chain 16 while transporting it rearward along the handling chamber 18 while holding the drive case 22 between the holding rails 20.
Is a drive shaft 2 of a compressed air fan (Karamin fan) 23 which is installed at the front end of the threshing unit 3 (sorting room 19) facing left and right.
4 through a belt-type continuously variable transmission 25 to input power to the threshing unit and reduce the power to drive the sprocket 2
1 is supplied.

The belt-type continuously variable transmission 25 includes movable split pulleys 26b, 2a with respect to fixed split pulleys 26a, 27a.
A pair of variable pitch pulleys 26 and 27 whose pulley width (pitch diameter) changes based on the axial movement of 7b is provided, and a transmission belt 28 is suspended between the pair of variable pitch pulleys 26 and 27. When one of the variable pitch pulleys 27 is forcibly shifted in the direction of increasing the pitch diameter by the driving force of a shift operating device 29 described later, the other variable pitch pulley 26 is urged by the elastic machine 30 in the direction of increasing the pitch diameter. Receives the belt tension that exceeds the urging force of the armature 30 and performs a shift operation in a driven manner in the direction of decreasing the pitch diameter. When one of the variable pitch pulleys 27 is forcibly shifted in the direction of decreasing the pitch diameter, the other operates. The variable pitch pulley 26 receives the urging force of the ammunition 30 which exceeds the belt tension, and performs a shift operation in a driven manner in the pitch diameter increasing direction. That is, the pitch diameter of the pair of variable pitch pulleys 26 and 27 changes reciprocally with the driving of the speed change operation device 29, and the transport operation speed of the threshing feed chain 16 is steplessly changed based on this pitch diameter change. It has become.

The variable pitch pulley 2 is mounted on the input shaft 31 of the drive case 22 and the drive shaft 24 of the compressed air fan 23.
In connecting the gears 6 and 27, respectively,
9, a variable-pitch pulley 2 forcibly shifting gears with a driving force of 9
7 is connected to the input shaft 31 of the drive case 22, while the variable pitch pulley 26, which is operated to shift in the pitch diameter increasing direction by the urging force of the elastic machine 30, is connected to the drive shaft 24 of the compressed air fan 23. That is, when the variable pitch pulley 27 on the threshing feed chain 16 is forcibly shifted to the speed increasing side, the variable pitch pulley 26 on the engine side is shifted to the speed increasing side while receiving the urging force of the elastic machine 30. Because of the ammunition 3
The speed change operation is performed more quickly than when the speed change operation is performed to the speed increasing side while resisting the urging force of 0, and as a result, the responsiveness of the belt type continuously variable transmission 25 to the speed increasing side is improved. It has become.

A speed change sleeve 32 is provided inside the variable pitch pulley 27.
Numeral 2 is connected to a movable split pulley 27b via a bearing 33 so as to be rotatable around the axis and move integrally with the axis. On the other hand, reference numeral 34 denotes a support cylinder of the input shaft 31 projecting outward from the drive case 22. A spiral groove 34a having a predetermined pitch is formed on an outer peripheral portion of the support cylinder 34. Since the ball 35 held on the inner peripheral portion of the speed change sleeve 32 is fitted into the speed change sleeve 34a, when the speed change sleeve 32 rotates forward and reverse around the axis, the speed change sleeve 32 and the movable split Pulley 2
The variable pitch pulley 27 is forcibly operated to shift based on the pulley displacement.

Reference numeral 36 denotes a feed chain transmission motor (motor with a speed reduction mechanism) provided on the outer peripheral portion of the transmission sleeve 32 via a motor bracket 37, and a small-diameter gear provided on an output shaft 36a of the feed chain transmission motor 36. 38 meshes with a large-diameter gear 39 fixedly provided on the outer peripheral portion of the speed change sleeve 32, so that the speed change sleeve 32 is rotated with the driving of the motor, and the movable split pulley 27b is extended as described above. Although the gear shift operation is forcibly performed, a pin 40 protrudes from the motor bracket 37 that is rotatably supported by the shift sleeve 32 in the axial direction, while a sensor bracket fixed to the drive case 22 is provided. 41
Is formed with an elongated guide hole 41a which restricts the rotation of the pin 40 in the direction around the axis and allows the pin 40 to move in the axial direction (sleeve moving direction). The speed change motor 36 moves in the axial direction integrally with the speed change sleeve 32 and the movable split pulley 27b without rotating around the axis.

Reference numeral 42 denotes a feed chain speed sensor (potentiometer) mounted on the sensor bracket 41.
The sensor shaft 42a of the feed chain speed change sensor 42 is integrally provided with a sensor arm 42b which resiliently contacts the pin 40, and is therefore movable based on the position detection of the pin 40. The shift position of the split pulley 27b (shift sleeve 32) can be detected.

Reference numeral 43 denotes a vehicle speed operating lever (main transmission lever) provided on the operation section 6, and the vehicle speed operating lever 4
3 advances the body based on the operation from the neutral position to the front, moves the aircraft backward based on the operation from the neutral position to the rear, and further increases the vehicle speed in proportion to the operation amount from the neutral position. To this end, it is connected to the traveling main transmission mechanism 13.

On the other hand, reference numeral 44 denotes a microcomputer (CP
U, ROM, RAM, etc.) (a continuously variable transmission control device), and the input side of the control device 44 is provided with the above-described feed chain speed sensor 42,
A lever position sensor 45 for detecting a lever position of the vehicle speed operation lever 43, an engine rotation sensor 46 for detecting engine rotation, a work machine clutch switch 47 for detecting on / off of a work machine clutch (not shown), and used for mode switching. An input check switch 48, a main depth sensor 49 for detecting the presence or absence of a stem in the second pretreatment transport device 11, a feed chain shift switch 50 for manually switching a feed chain speed, and an auger automatic storage switch for executing auger automatic storage control. 51, an auger automatic turning switch 52 for executing auger automatic turning control, a manual right turning switch 5 for detecting a right turning operation of an auger manual lever (not shown)
3. A manual left turning switch 54 for detecting a left turning operation of the auger manual lever is connected via a predetermined input interface circuit, and an output of the auger automatic lever 36 is connected to the output side in addition to the feed chain transmission motor 36 described above. Storage lamp 5
5, an auger automatic turning lamp 56, a feed chain lamp 57, a horn 58 and the like are connected via a predetermined output interface circuit.

Numeral 59 denotes a non-volatile memory provided in the control unit 44. The non-volatile memory 59 is constituted by an EEPROM or the like which does not lose the recorded contents even when the main power is turned off and is capable of rewriting the recorded contents. The non-volatile memory 5
9 is provided with an area for recording a maximum speed reference value serving as a reference value of the feed chain shift sensor 42, a specification set value for checking the specifications (new and old) of the machine, and the like.

The control unit 44 controls the drive of the feed chain transmission motor 36 based on the "feed chain target value setting" (normal control mode) for setting the feed chain target value according to the vehicle speed, the target value and the current value. “Feed chain shift output” (normal control mode), “feed chain input check” (adjustment mode) that drives the feed chain shift motor 36 at low speed in response to a manual operation signal,
"EEPRO" for changing the recorded content of the nonvolatile memory 59
A control program such as “M recording mode” (change recording mode) is provided, and the procedure of each control will be described below with reference to flowcharts.

In the above-mentioned "feed chain target value setting",
First, it is checked whether this machine is of a new specification or an old specification. If it is determined that this is a new specification, then the operation position of the vehicle speed operation lever 43 and the main depth sensor 4 are determined.
9 is turned on / off. If it is determined that the operation position of the vehicle speed operation lever 43 is equal to or less than V1 (including reverse) or the depth-of-depth main sensor 49 is OFF, the feed chain target value is calculated as the minimum speed calculation value (highest speed recording value−low speed Change width). On the other hand, when it is determined that the handling depth main sensor 49 is ON and the operation position of the vehicle speed operation lever 43 is equal to or higher than V7, the highest speed recorded value (the maximum value recorded in the non-volatile memory 59) is set as the feed chain target value. High-speed reference value), but the
Is ON, and the operation position of the vehicle speed operation lever 43 is V2
When it is determined that the vehicle speed is in the V6 range, the vehicle speed interlocking calculation value is set to the feed chain target value.

On the other hand, if it is determined that the old specification is used,
Subsequently, the operation position of the vehicle speed operation lever 43 is determined. If it is determined that the operation position of the vehicle speed operation lever 43 is equal to or less than V1 (including reverse), a minimum fixed speed value is set to the feed chain target value.
If it is determined that the operation position of is equal to or higher than V7, the highest speed fixed value is set as the feed chain target value, and
When it is determined that the operation position of the vehicle speed operation lever 43 is in the range of V2 to V6, the vehicle speed interlocking calculation value is set to the feed chain target value.

In the "feed chain shift output",
The feed chain target value set as described above is compared with the current value of the feed chain shift sensor 42. If the current value is larger than the target value, the feed chain shift motor 36 is driven to the deceleration side, When the current value is smaller than the target value, the feed chain speed change motor 36 is driven to the speed increasing side.

On the other hand, in the "feed chain input check", it is determined whether the engine is rotating and whether the work machine clutch is engaged or disengaged. Here, it is determined that the engine is rotating and the work machine clutch is engaged. In this case, the lever position of the vehicle speed operation lever 43 is further determined, and if the lever position is in the forward operation range, the feed chain transmission motor 36 is inching-operated so that the movable split pulley 27b moves at a low speed to the speed increasing side. On the other hand, when the lever position is in the reverse operation range, the feed split speed motor 36 is inching-driven so that the movable split pulley 27b moves at a low speed to the deceleration side. That is, after the engine is started and the work machine clutch is engaged, the input check switch 48 is set to the adjustment mode. Thereafter, the pulley width of the variable pitch pulley 27 is measured manually and based on the operation of the vehicle speed operation lever 43. By moving the movable split pulley 27b, the movable split pulley 27b can be set to a preset maximum speed setting position.

In the "EEPROM recording mode", it is first determined whether the recording mode execution condition is satisfied or not. That is, when the power is turned on (key switch ON), the input check switch 48 is turned on, the work equipment clutch is engaged, the manual right turning switch 53 is turned on, the manual left turning switch 54 is turned off, and the vehicle speed operation lever 43 is set in the reverse position. Are determined, and when it is determined that all the conditions are satisfied, the recording mode is entered. In the recording mode, a subroutine such as a “feed chain fastest position change recording mode” and a “specification change recording mode”, which will be described later, is executed. When the recording flag is set in any of the subroutines, the lamp circulating blinking is stopped and only the corresponding lamp is blinked.

In the "feed chain highest speed position change recording mode" (reference value reset mode), first, the state of the feed chain recording flag is determined, and the flag is turned off.
If it is determined that the operation is performed, the operation state of the feed chain shift switch 50 is determined. If it is determined that the feed chain speed change switch 50 has been switched from the high speed state to the low speed state, it is determined that the above-described operation for changing the recording of the feed chain highest speed reference value (resetting operation), and the feed chain recording is being performed. The flag is set to ON.

When the feed chain recording flag is ON, the operation state of the feed chain shift switch 50 is determined again while the feed chain lamp 57 is blinking, and the feed chain shift switch 50 is switched from the low speed state to the high speed state. When it is determined that the switching has been performed, after confirming that the current feed chain shift sensor value is within an appropriate range, the current feed chain shift sensor value is recorded in the nonvolatile memory 59 as the highest speed reference value, and If it is determined that the feed chain shift switch 50 has been switched while the manual lever is being moved upward, the preset highest speed standard value (initial value) is recorded in the nonvolatile memory 59 as the highest speed reference value. It is supposed to. Then, when the highest speed reference value is reset, the feed chain recording flag is turned off and the feed chain highest speed position change recording mode is ended. However, when the feed chain recording flag is on, a predetermined switch is turned on. When operated, the feed chain maximum speed position change recording mode is ended without resetting the maximum speed reference value.

In the "specification change recording mode", first, the state of the specification change recording flag is determined, and if the flag is determined to be OFF, the auger automatic turning switch 52 and the auger automatic storage switch 51 are determined. Is determined. Then, both switches 51 and 52 are simultaneously turned on.
If it is determined that N operations have been performed, it is determined that the operation is a recording change operation of the specification setting value described above, and the specification change recording flag is turned ON.

When the specification change recording flag is ON, the operating state of the auger automatic turning switch 52 and the auger automatic storing switch 51 is determined again while the auger automatic turning lamp 56 and the auger automatic storage lamp 55 are blinking. And the simultaneous ON state of both switches 51 and 52 is 3
If it is determined that the operation has continued for more than one second, the non-volatile memory 59
Reverse the specification setting value recorded in (new → old, old →
New). When the specification setting value is reset, the specification change recording flag is turned off.
Then, the specification change recording mode is ended, but if any one of the switches 51 and 52 is turned off before the lapse of 3 seconds, the specification change recording mode is ended without resetting the specification setting value. Has become.

In the apparatus constructed as described above, the control unit 44 of the belt-type continuously variable transmission 25 for continuously changing the transport operation speed of the threshing feed chain 16 has a feed chain for detecting the position of the movable split pulley 27b. When the detection value of the shift sensor 42 is input and the movement of the movable split pulley 27b is controlled based on the detection value, the control device 44
In addition, a feed chain maximum speed position change recording mode (reference value reset mode) for resetting the preset maximum speed reference value based on the feed chain shift sensor value at the time of the maximum speed position movement is provided. It becomes unnecessary to adjust the position of the chain shift sensor 42. As a result, it is not possible to improve the workability at the time of assembling the sensor, and it is also possible to avoid the occurrence of a control error due to a position adjustment error. In addition, in the continuously variable transmission 25 of the threshing feed chain 16, since the work is frequently performed at the highest speed, even if there is a variation in the characteristic of changing the sensor value, a decrease in the work accuracy due to the detection error is minimized. Can be minimized.

Further, the control device 44 of the present embodiment is provided with the control parameters of the old specification and the control parameters of the new specification, and switches the control parameters to be used based on the change recording operation of the specification set value. When one type of control device 44 can support new and old specifications, and specifications are changed using existing operation tools, a special switching operation tool (such as a giboshi) is separately provided. However, the number of parts can be reduced, and the number of input ports of the control device 44 can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a combine.

FIG. 2 is a schematic side view of a preprocessing unit.

FIG. 3 is a side view of a threshing unit.

FIG. 4 is a sectional view of the same.

FIG. 5 is a power transmission diagram of a threshing unit.

FIG. 6 is a front view of the compressed air fan.

FIG. 7 is a front view of the belt-type continuously variable transmission.

FIG. 8 is a sectional view of an engine-side variable pitch pulley.

FIG. 9 is a sectional view of a feed chain-side variable pitch pulley and a drive case.

FIG. 10 is a plan view of a sensor bracket.

FIG. 11 is a side view of a vehicle speed operation lever.

FIG. 12 is a rear view of the same.

FIG. 13 is a block diagram showing input and output of the control device in a normal control mode.

FIG. 14 is a block diagram showing input and output of the control device in an adjustment mode.

FIG. 15 is a block diagram showing input and output of the control device in a change recording mode.

FIG. 16 is a flowchart showing “feed chain target value setting”.

FIG. 17 is a flowchart showing “feed chain shift output”.

FIG. 18 is a flowchart showing “feed chain input check”.

FIG. 19 is a flowchart showing an “EEPROM recording mode”.

FIG. 20 is a flowchart showing a “feed chain highest-speed position change recording mode”.

FIG. 21 is a flowchart illustrating a “specification change recording mode”.

[Description of Signs] 1 Combine 16 Threshing feed chain 25 Belt-type continuously variable transmission 27 Variable pitch pulley 27b Movable split pulley 36 Feed chain transmission motor 42 Feed chain transmission sensor 44 Control device 59 Non-volatile memory

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masahiro Nishikori 667 Iya-cho, Oji-machi, Higashi-Izumo-cho, Yatsuka-gun, Shimane 1 F term in Mitsubishi Agricultural Machinery Co., Ltd. 3J552 MA07 MA10 MA17 NA07 NB01 PA61 PA61 PA64 PB08 QC07 SA34 SB01 VA17X VA32Z VA62Z VA74Z

Claims (2)

[Claims] 1. A detection value of a pulley position detection sensor for detecting a position of a movable split pulley of a belt-type continuously variable transmission is input,
A continuously variable transmission control device that controls the movement of a movable split pulley based on the detected value, wherein the continuously variable transmission control device includes a preset pulley position detection sensor reference value, and a pulley position detection sensor when the reference position is moved. A continuously variable transmission control device provided with a reference value reset mode for resetting based on a value. 2. A continuously variable transmission control device according to claim 1, wherein a continuously variable transmission of a threshing feed chain provided in the combine is controlled, and a pulley position detection sensor for detecting a position of a movable split pulley of the continuously variable transmission. Wherein the highest speed reference value is reset based on the value of the pulley position detection sensor at the highest speed.