JP5232028B2 - Mowing harvester - Google Patents

Description

  The present invention relates to a harvesting and harvesting machine that includes a traveling transmission device that has a cutting unit connected to a traveling machine body so as to be movable up and down to a non-working height and a lowering work height, and that drives the traveling device of the traveling machine.

In the above-described harvesting and harvesting machine, when performing traveling while performing cutting by the harvesting unit, so-called work traveling, in order to prevent occurrence of poor harvesting such as pushing down of stems caused by excessively high traveling speed, It is possible to drive the traveling device by shifting it to the low speed side with the traveling transmission device, and when traveling by raising the mowing part to the raised non-working height, so-called traveling traveling, faster and faster than during working traveling. Thus, the traveling device can be driven to be shifted to the high speed side by the traveling transmission device.
As this type of harvesting and harvesting machine, there has been conventionally a combine described in Patent Document 1, for example. In the combine described in Patent Document 1, the rotational force of the output shaft 8a of the engine 8 is transmitted to the input shaft 18a of the travel transmission 18 via the transmission belt 17, and the output shaft 18b of the travel transmission 18 is transmitted. Is transmitted to the left and right traveling apparatuses 1 via the traveling mission M. The turning force of the output shaft 18 b of the traveling transmission 18 is transmitted to the input shaft 3 d of the cutting unit 3 via the cutting clutch 19. (Each symbol is described in the publication.)

Japanese Patent Laying-Open No. 2002-262643 (paragraph [0021], FIG. 2)

FIG. 16 is an explanatory diagram showing a work form that may be employed in the harvesting work by the combine.
As shown in this figure, when traveling along the reed 80 is performed and a moving travel area 82 is formed between one side and the other side of the uncut area 81 and the reed 80, the travel of the uncut area 81 is performed. Work travel is performed on the work target row located at one end in the direction along the ground 82. When this work travel is finished and one mobile travel location 82 is reached, the travel travel location 82 travels toward the other end of the uncut ground 81. When the other end portion of the uncut area 81 is reached, the work travel is performed on the work target row located at the end portion. When the work travel is finished and the other travel travel location 82 is reached, the travel travel location 82 is moved toward one end of the uncut ground 81 and the work travel is performed on the work target row located at the end. . In this way, there may be employed a work form in which the work travel at both ends of the uncut ground 81 and the mobile travel at each mobile travel location 82 are repeatedly performed.
That is, when the work mode is adopted in which when the work travel is finished and the headland is reached, the work is performed on the next work target row located next to the previous work travel place by turning on the headland. It tends to take time because it is necessary to repeat forward and backward for turning on the ground. On the other hand, when the operation mode of traveling between one end and the other end of the uncut ground as described above is adopted, troublesome turning at the headland becomes unnecessary.

  In the case of adopting the above-described operation mode for moving traveling, if the traveling device is driven and shifted to a higher speed side than during the traveling operation, the traveling device can be moved quickly to perform the operation more efficiently. Can do.

  However, when the traveling travel is performed at a higher speed than the work traveling, the traveling device needs to be decelerated and driven when the traveling traveling is finished and the working traveling is started. If it is necessary to perform this deceleration by a dedicated operation, it becomes difficult to obtain a good work efficiency due to a troublesome deceleration operation.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a harvesting and harvesting machine that can perform operations efficiently and easily when performing operations using the above-described traveling movement.

According to the first aspect of the present invention, a cutting unit is connected to the traveling machine body so as to be movable up and down at a non-working height and a lowering work height, and a traveling transmission device that drives the traveling device of the traveling machine to shift and a transmission to the cutting unit. In a harvesting and harvesting machine equipped with a cutting clutch for turning on and off ,
When the cutting part is lowered to the lowering work height in the on state, the cutting clutch is operated to be in the on state, and even when the cutting part is lowered to the lowering work height in the off state, Auto clutch means for not operating the mowing clutch in the engaged state;
As the traveling speed change device is deceleration operation from the setting speed position by the operation of lowering the reaper in the descending working height, and linkage means capable Rukoto is linked with said traveling speed change device and the reaper, equipped with a,
When the auto clutch means is in the on state, when the reaping part is operated to be lowered to the lowering work height, the reaping clutch is operated to be in an engaged state, and the traveling transmission is set to the set high speed position. Is decelerated from
Even when the auto clutch means is in the off state, the traveling transmission device is configured to decelerate from the set high speed position when the mowing unit is lowered to the lowering work height .

  According to the configuration of the first aspect of the present invention, when the operation of lowering the cutting unit is performed, the traveling transmission device is naturally decelerated from the set high speed position by the linkage between the cutting unit and the traveling transmission device by the linking means. When working in the above-described work mode, the operation of lowering the mowing unit to lower the mowing unit from the non-working height of the moving traveling to the lowering working height when finishing the traveling and entering the working traveling Is done. Thus, according to the configuration of the first aspect of the present invention, if the set high speed position is appropriately set, even if the mobile travel is performed at a speed higher than that of the work travel, when the travel travel is finished, the reaping portion is lowered. If the operation is further reduced, the travel device is driven at a speed lower than the speed of the traveling travel and the work travel is performed at a travel speed suitable for the work travel without performing a special speed change operation for decelerating the travel transmission. Can enter.

  Therefore, when working in the above-described work mode, the lowering of the cutting part is performed so that the traveling travel is performed at a speed higher than that of the traveling operation, and the traveling travel is finished and the traveling speed is decelerated from traveling to working. All you need to do is operate, and you can do it efficiently and easily.

In the second aspect of the present invention, when the auto clutch means is in the off state, the linkage means is configured to bring the traveling transmission device to the set high speed position regardless of the lowering operation of the reaping portion when the reaping clutch is disengaged. Configured to maintain.

  When traveling on the road, even if the cutting part has a relatively low connection height that is less than or equal to the set connection height and travels at a higher speed than work driving, the cutting part is Therefore, it is difficult for large vibrations to occur and grounding troubles at the cutting part are unlikely to occur. In this case, according to the configuration of the second aspect of the present invention, if the cutting clutch is in the disengaged state, the traveling transmission device is not decelerated and maintained at the set high speed position even when the cutting unit is lowered. It is possible to travel at high speed while maintaining a low connection height.

Therefore, at the work site, the traveling gearbox can be automatically decelerated by simply performing the lowering operation of the cutting part, and the operation can be easily and efficiently performed. Therefore, it is possible to obtain an advantageous harvester that can move quickly and rapidly while reducing the center of gravity of the harvester as a whole.
In the third aspect of the present invention, the cutting unit is connected to the traveling machine body so as to be lifted and lowered to the ascending non-working height and the descending working height, and the traveling transmission device that drives the traveling device of the traveling machine to shift the gear, and the transmission to the cutting unit. A harvesting and harvesting machine comprising a cutting and cutting clutch,
When the cutting part is lowered to the lowering work height in the on state, the cutting clutch is operated to be in the on state, and even when the cutting part is lowered to the lowering work height in the off state, Auto clutch means for not operating the mowing clutch in the engaged state;
Linking means capable of linking the cutting unit and the traveling transmission so that the traveling transmission is decelerated from a set high-speed position by an operation of lowering the cutting unit to the lowering work height. Prepared,
When the auto clutch means is in the on state, when the reaping part is operated to be lowered to the lowering work height, the reaping clutch is operated to be in an engaged state, and the traveling transmission is set to the set high speed position. Is decelerated from
Even when the auto-clutch means is in the off state, the travel transmission device is configured to be decelerated from the set high-speed position when the cutting part is operated to be lowered to the lowering work height.
When the auto clutch means is off, the linkage means is configured to maintain the traveling transmission device at the set high speed position regardless of the lowering operation of the reaping portion when the reaping clutch is disengaged.
In the fourth aspect of the present invention, the travel transmission device has a standard position for driving the travel device at a speed suitable for work travel, and a speed that is suitable for work travel and lower than the speed corresponding to the standard position. It is possible to switch between a low speed position for driving the traveling device and a high speed position for driving the traveling device at a speed that is appropriate for moving traveling and higher than the speed corresponding to the standard position,
Only when the high speed position corresponds to the set high speed position and the traveling transmission is in the high speed position, the traveling transmission is decelerated from the high speed position to the standard position.

It is a side view which shows the whole mowing harvester. It is explanatory drawing which shows a transmission device. It is a block diagram which shows an operating device. It is a hydraulic circuit diagram of a travel transmission. It is explanatory drawing which shows a moving travel state, a standard cutting state, and a low-speed cutting state. It is explanatory drawing which shows the relationship between the operation state of an auto switch and a cutting clutch lever, and the state of an auto clutch means. It is a flowchart which shows a cutting part control. It is a flowchart which shows auto clutch control. It is a flowchart which shows a mowing part raising / lowering control. It is a flowchart which shows a mowing clutch control. It is a flowchart which shows traveling control. It is a flowchart which shows standard control. It is a flowchart which shows low speed control. It is a flowchart which shows movement control. It is a flowchart which shows linkage control. It is explanatory drawing which shows the operation | work form of a harvesting operation | work.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Drawing 1 is a side view showing the whole harvesting harvester concerning the embodiment of the present invention. As shown in this figure, the harvesting and harvesting machine according to the embodiment of the present invention is configured to be self-propelled by a pair of left and right crawler-type traveling devices 1 and 1, and is equipped with a driving seat 3a. The threshing device 4 and the grain are provided with a cutting unit 2 connected to the front part of the machine body frame of the machine body and arranged side by side in the transverse direction of the machine body on the rear side of the machine frame of the machine body. A tank 5 is provided.

This harvesting machine performs harvesting work for rice and wheat.
That is, the cutting unit 2 includes a cutting unit frame 20 that is supported on the machine frame so as to swing up and down around the axis P1, a weeding tool 21 that is supported by the cutting unit frame 20, a pulling device 22, and a clipper type. A reaping device 23 and a supply device 24 are provided. The mowing unit 2 includes a lowering work height in which the weeding tool 21 is lowered near the ground, and a splitting height when the mowing unit frame 20 is swung up and down by a hydraulic and single-acting lifting cylinder 27. The grass tool 21 ascends and descends to a raised non-working height that is elevated from the ground.

  When the cutting unit 2 is lowered to the lowering work height and the traveling body is driven, the cutting unit 2 uses the weeding tool 21 to separate the planted cereals into a cutting target and a non-cutting target, and to plant the cutting target. The standing culm is raised and processed by the device 22 and processed by the reaping device 23, and the reaped cereal is conveyed to the front part of the threshing device 4 by the supply device 24 and supplied to the starting end of the threshing feed chain 28. .

  The threshing device 4 supplies the tip side of the harvested cereal cocoon to the handling room (not shown) while sandwiching the stock side of the harvested cereal by the threshing feed chain 28 and transporting it backward in the traveling machine body. To do. The grain tank 5 collects and stores the threshed grains conveyed from the threshing device 4.

  The traveling machine body includes an engine 6 provided below the driver's seat 3a, and a pair of left and right traveling devices 1 and 1 and a harvester via a transmission case 8 provided with driving force output from the engine 6 at a front end portion of the body frame. A transmission device for transmission to the unit 2 is provided.

  FIG. 2 is an explanatory diagram of the transmission device. As shown in this figure, the transmission device includes the transmission case 7 in addition to the transmission case 8, which is connected to the upper end of the transmission case 8. The transmission device transmits the driving force of the output shaft 6 a of the engine 6 to the input shaft 7 a of the traveling transmission device 7 via the main clutch 9 formed of a belt tension clutch, and the driving force of the output shaft 7 b of the traveling transmission device 7. Is transmitted to the crawler drive shafts 1 a of the left and right traveling apparatuses 1, 1 via a mission (not shown) located inside the mission case 8. The mission located inside the mission case 8 includes an input gear 19 that meshes with the first transmission gear 10 that is linked to the output shaft 7b of the traveling transmission 7 so as to be integrally rotatable. A steering mechanism (not shown) for transmitting to the crawler drive shafts 1a and 1a is provided. The steering mechanism transmits the driving force of the input gear 19 to the left and right crawler drive shafts 1a and 1a, or separates and shifts the transmission to the left and right crawler drive shafts 1a and 1a, respectively. , 1 are driven, stopped, and shifted separately, thereby performing the steering operation of the traveling machine body.

  The transmission device inputs the driving force of the output shaft 7b of the traveling transmission device 7 to the cutting transmission device 18 built in the upper end portion of the transmission case 8, and the driving force of the output shaft 13 of the cutting transmission device 18 is transferred to the belt. It transmits to the input shaft 2a of the cutting part 2 via the cutting clutch 17 which consists of a tension clutch. As a result, the transmission device transmits the driving force of the output shaft 7b of the traveling transmission device 7 to the cutting unit 2, and when the traveling device 1 is shifted by the traveling transmission device 7, the transmission device synchronizes with the shifting of the traveling device 1. Shifting the cutting unit 2.

As shown in FIG. 2, the cutting transmission 18 rotates integrally with the low-speed transmission gear 14 meshed with the first transmission gear 10 and the output shaft 7 b of the traveling transmission 7 via the first transmission gear 10 and the transmission shaft 12. A second transmission gear 11 that is freely linked, a high-speed transmission gear 15 that meshes with the second transmission gear 11, and a shift gear 16 that is rotatably supported by the output shaft 13 are provided.
The cutting transmission 18 is switched to the low speed position when the shift gear 16 is slid and meshed with the low speed transmission gear 14, and is switched to the high speed position when the shift gear 16 is slid and meshed with the high speed transmission gear 15.

  As shown in FIGS. 2 and 3, the travel transmission 7 includes a variable displacement hydraulic pump 7P having an input shaft 7a as a pump shaft, and a hydraulic motor 7M having an output shaft 7b as a motor shaft. It is. The hydraulic motor 7M is driven by pressure oil supplied by a hydraulic pump 7P. The hydraulic motor 7M is a variable displacement hydraulic motor.

  The traveling transmission device 7 is configured as a hydrostatic continuously variable transmission, and by changing the swash plate angle of the hydraulic pump 7P, the driving force from the engine 6 is changed to the driving force on the forward side and the backward side. To the left and right traveling apparatuses 1 and 1 with a stepless shift on both the forward side and the reverse side.

The traveling transmission 7 switches to the high speed position, the standard speed position, and the low speed position by performing an operation of changing the swash plate angle of the hydraulic motor 7M, and performs the sub-shifting of the left and right traveling apparatuses 1 and 1.
In other words, when the traveling transmission device 7 is switched to the standard position, the left and right traveling devices 1 and 1 are driven at a standard speed suitable for work traveling when the planted cereals do not fall down or are small. When the traveling speed change device 7 is switched to the low speed position, the left and right traveling devices 1 and 1 are driven at a speed that is lower than the standard speed and that is suitable for work traveling when the planted cereals are severely collapsed. When the travel transmission device 7 is switched to the high speed position, the left and right travel devices 1 and 1 are driven at a speed higher than the standard speed and suitable for moving travel.

  As shown in FIG. 3, the operating shaft for changing the swash plate angle of the hydraulic motor 7M of the traveling transmission 7 is linked to the speed change lever 43 via a mechanical linkage mechanism 33 using a swing link or the like. . The shift lever 43 is provided in the driving unit 3 so as to be swingable in the front-rear direction of the traveling machine body.

  That is, the travel transmission 7 is switched to the neutral state when the transmission lever 43 is operated to the neutral position N, stops the hydraulic motor 7M, and cuts off the transmission to the left and right travel devices 1 and 1. The travel transmission device 7 is switched to the forward drive state by operating the shift lever 43 in the forward travel region F that swings forward from the neutral position N to the front of the travel aircraft body, and the drive force from the engine 6 is changed to the forward drive force. This is converted and transmitted to the left and right traveling devices 1, 1. The travel transmission 7 is switched to the reverse drive state by operating the shift lever 43 in the reverse range R in which the shift lever 43 swings from the neutral position N to the rear side of the travel vehicle body, and the drive force from the engine 6 is changed to the reverse drive force. This is converted and transmitted to the left and right traveling devices 1, 1.

  As shown in FIG. 3, the travel transmission 7 includes a hydraulic operation cylinder 56 that is linked to an operation shaft that changes the swash plate angle of the hydraulic motor 7 </ b> M, and this operation cylinder 56 is operated by a control valve 58. As a result, the high speed position, the standard speed position, and the low speed position are switched.

  FIG. 4 is a hydraulic circuit diagram of the travel transmission 7. As shown in this figure, the hydraulic pump 7P and the hydraulic motor 7M are connected by a pair of oil passages 7c. The charge pump 44 and the hydraulic pump 60 are connected to the input shaft 7a of the travel transmission 7 and the charge pump 44 and the hydraulic pump 60 are driven by the input shaft 7a. A charge oil passage 45 extending from the charge pump 44 is connected to the oil passage 7 c, and a filter 49 is provided in the charge oil passage 45. An oil passage 47 is connected across the oil tank 46 and the charge pump 44, and a filter 48 is provided in the oil passage 47. The hydraulic oil of the hydraulic pump 60 is supplied to the control valve of the lifting cylinder 27. The oil tank 46 is provided separately from the mission case 8.

  The oil passage 57 branches from the charge oil passage 45, and the control valve 58 operates the operation cylinder 56 by supplying and discharging the hydraulic oil in the oil passage 57 to the operation cylinder 56. A relief valve 50 is connected to the charge oil passage 45. The relief valve 50 is connected to a case 51 that houses the traveling transmission 7. An oil passage 52 is connected across the case 51 and the oil tank 46, and an oil cooler 53 is provided in the oil passage 52.

  With the above structure, the hydraulic oil in the oil tank 46 is supplied to the oil passage 7 c of the traveling transmission 7 through the filter 48, the oil passage 47, the charge pump 44, the filter 49 and the charge oil passage 45. The hydraulic oil in the charge oil passage 45 is supplied to and discharged from the operation cylinder 56 via the oil passage 57 and the control valve 58. Excess hydraulic fluid is discharged to the case 51 through the relief valve 50. The hydraulic oil from each part of the travel transmission 7 and the hydraulic oil of the control valve 58 are discharged to the case 51, and the hydraulic oil in the case 51 passes through the oil passage 52 and the oil cooler 53 and is returned to the oil tank 46.

  FIG. 3 is a block diagram illustrating an operation device that performs a shifting operation of the traveling transmission device 7 and the cutting transmission device 18, an on / off operation of the cutting clutch 17, and a lifting operation of the cutting unit 2. As shown in this figure, the operating device includes an electric operating motor 36 for turning on and off the cutting clutch 17 and an electric operating motor 37 for shifting the cutting transmission 18, and the control valve 58 of the hydraulic cylinder 56. A control device 31 is provided which is linked to an electromagnetic operation unit, an operation motor 36 for the cutting clutch 17, an operation motor 37 for the cutting transmission 18, and a lifting cylinder 27, a cutting shift switch 35 linked to the control device 31, a travel shift A switch 34, an auto switch 30, a cutting clutch lever 26, and an elevating lever 29 are provided. The control device 31 is also linked to a travel shift sensor 38, a cutting shift sensor 40, a connection height sensor 61, a cutting clutch sensor 62, a stock sensor 78, and a cutting rotation sensor 79.

  The operation motor 36 of the reaping clutch 17 switches the reaping clutch 17 between the on state and the off state by swinging the tension arm. The operation motor 37 of the cutting transmission 18 is interlocked with the shift fork, and the shift gear 16 is engaged with the low speed transmission gear 14 or the high speed transmission gear 15 by moving the shift fork.

  The cutting shift switch 35 is provided on the back of the transmission lever 43. The travel shift switch 34 is provided on the side of the shift lever 43. When the cut shift switch 35 and the travel shift switch 34 are pressed, they are turned on and output a shift command to the control device 31.

  The mowing clutch lever 26 is provided in the operating unit 3 and is linked to the control device 31 via an on switch 65 and an off switch 66. The mowing clutch lever 26 is switched between the on position [ON] and the cut position [OFF] by swinging in the longitudinal direction of the traveling machine body. When the cutting clutch lever 26 is operated to the ON position [ON], the ON switch 65 is turned ON and an ON command is output to the control device 31 by the ON switch 65. When the cutting clutch lever 26 is operated to the cutting position [OFF], the cutting switch 66 is turned on, and the cutting switch 66 outputs a cutting command to the control device 31.

  The elevating lever 29 is provided in the operation unit 3 and is linked to the control device 31 via a raising switch 67 and a lowering switch 68. The elevating lever 29 is switched between the raised position [U] and the lowered position [D] by swinging in the front-rear direction of the traveling machine body. When the raising / lowering lever 29 is operated to the raising position [U], the raising switch 67 is turned on, and the raising switch 67 outputs a raising command to the control device 31. When the raising / lowering lever 29 is operated to the lowered position [D], the lowering switch 68 is turned on, and the lowering switch 68 outputs a lowering command to the control device 31.

  The elevating lever 29 is supported so as to be swingable also in the lateral direction of the traveling machine body, and is also a lever for performing a steering operation of the traveling machine body. That is, when the elevating lever 29 is operated to the neutral position, the operation mechanism is operated so as to travel straight ahead by operating the internal steering mechanism in the mission case 8 to the neutral state. When the elevating lever 29 is swung from the neutral position to the left side of the traveling machine body, the elevating lever 29 operates to steer the traveling machine body to the left by operating the steering mechanism to the left turning state. When the lifting lever 29 is swung from the neutral position to the right side of the traveling vehicle body, the lifting lever 29 is operated to steer the traveling vehicle body to the right by operating the steering mechanism to the right turning state.

  The traveling speed change sensor 38 detects the operation position of the swash plate of the hydraulic motor 7M of the traveling speed change device 7 as the high speed position, the standard speed position, and the low speed position of the travel speed change device 7, and outputs the detection result to the control device 31.

  The cutting speed change sensor 40 detects the rotational position of the operation motor 37 of the cutting speed change device 7 as the low speed position and the high speed position of the cutting speed change device 18, and outputs the detection result to the control device 31.

  The auto switch 30 can be switched between an on state [ON] and an off state [OFF]. When the auto switch 30 is operated in the on state [ON], a command for switching the auto clutch means 70 on is output to the control device 31. When the switching operation is performed to the off state [OFF], a command for switching the auto clutch means 70 to the off state is output to the control device 31.

  The connection height sensor 61 detects the swing position of the cutting unit frame 20 with respect to the machine frame as the connection height of the cutting unit 2 with respect to the traveling machine body, and outputs the detected connection height to the control device 31.

  The reaping clutch sensor 62 detects the rotational position of the operation motor 36 of the reaping clutch 17 as the engaged state and the disconnected state of the reaping clutch 17, and outputs the detection result to the control device 31.

  The stock sensor 78 is provided in the cutting unit 2, detects the presence of the cereal in the cutting unit 2 by contacting the stock side of the cutting cereal conveyed by the supply device 24, and the detection result. Is output to the control device 31.

  The cutting rotation sensor 79 is provided in the cutting unit 2, detects that power is transmitted to the pulling device 22, and outputs the detection result to the control device 31.

  The control device 31 is configured using a microcomputer, and includes a linkage means 71, an auto clutch means 70, a mowing unit lifting / lowering means 72, a mowing clutch control means 73, a travel control means 74, a state setting means 75, and a shift check means. 77.

  FIG. 6 is an explanatory diagram showing the relationship between the operation state of the auto switch 30 and the cutting clutch lever 26 and the state of the auto clutch means 70. FIG. 7 is a flowchart showing reaping unit control.

  As shown in these drawings, the control device 31 operates the mowing clutch lever 26 to the on position [ON] or the cut position [OFF] based on commands from the on switch 65 and the off switch 66. Judge whether it has been. When the auto switch 30 is switched to the on state [ON] and the cutting clutch lever 26 is operated to the on position [ON], the control device 31 switches the auto clutch means 74 on, and the auto clutch means 74 Enable auto clutch control. The control device 31 operates the cutting clutch lever 26 to the cut position [OFF] when the auto switch 30 is switched to the off state [OFF] and even when the auto switch 30 is switched to the on state [ON]. If it is, the auto-clutch means 70 is switched off, and the cutting part lifting / lowering control by the cutting part lifting / lowering means 72 and the cutting clutch control by the cutting clutch control means 73 are performed.

  FIG. 8 is a flowchart showing the auto clutch control by the auto clutch means 70. As shown in this figure, the auto clutch means 70 links the cutting unit 2 and the cutting clutch 17 by being linked to the lift sensor 61 and the operation motor 36. In addition to performing the lifting control, the cutting clutch 17 linked to the lifting and lowering of the cutting unit 2 is controlled.

That is, the auto clutch means 70 determines whether the elevating lever 29 has been operated to the raised position [U] or the lowered position [D] based on information from the raising switch 67 and the lowering switch 68.
When the auto clutch means 70 determines that the elevating lever 29 has been operated to the raised position [U], the auto clutch means 70 switches the elevating cylinder 27 to the raised side and releases the operation of the elevating lever 29 to the raised position [U]. The mowing unit 2 is raised and operated until the mowing unit 2 rises to the upper limit height. At this time, the auto clutch means 70 determines that the connection height of the cutting unit 2 is the set connection height based on the detection information by the connection height sensor 61 and the set connection height by the connection height setting means 76 provided in the control device 31. If it is determined whether or not the coupling height of the cutting unit 2 is higher than the set coupling height, the operating cylinder 27 of the cutting clutch 17 is operated to the cutting side to disconnect the cutting clutch 17. Switch to the state.
The set connection height is a connection height that is slightly higher than the highest connection height used for work travel, and is located between the lower limit connection height and the upper limit connection height. Is set. When the cutting part 2 is set to a connection height higher than the set connection height, even if the traveling machine body is caused to travel at a high speed in the field and vertical vibrations are generated in the cutting part 2, the grounding of the cutting part 2 is unlikely to occur.

  When the auto-clutch means 70 determines that the elevating lever 29 has been operated to the lowered position [D], it shifts to linkage control (see FIG. 15) by the linkage means 71 described later and to the lowered position [D] of the elevating lever 29. The mowing unit 2 is lowered until the operation is released or until the mowing unit 2 is lowered to the lower limit height.

FIG. 9 is a flowchart showing the cutting unit lifting control by the cutting unit lifting means 72. As shown in this figure, the mowing unit lifting / lowering means 72 is based on the information from the raising switch 67 and the lowering switch 68, whether the raising / lowering lever 29 has been operated to the raised position [U] or the lowered position [D]. Judging.
When it is determined that the lifting / lowering lever 29 is operated to the raised position [U], the cutting unit lifting / lowering means 72 switches the lifting / lowering cylinder 27 to the raised side, and the operation of the lifting / lowering lever 29 to the raised position [U] is released. Until the mowing unit 2 is raised to the upper limit height.
When it is determined that the lifting / lowering lever 29 is operated to the lowered position [D], the cutting unit lifting / lowering means 72 shifts to linkage control (see FIG. 15) by the linkage means 71 described later, and the lowered position [D] of the lifting / lowering lever 29 is determined. The mowing unit 2 is operated to be lowered until the operation is released or until the mowing unit 2 is lowered to the lower limit height.

FIG. 10 is a flowchart showing the cutting clutch control by the cutting clutch control means 73. As shown in this figure, in the cutting clutch control means 73, the cutting clutch lever 26 is operated to the on position [ON] or the cutting position [OFF] based on information from the on switch 65 and the off switch 66. Judging.
When it is determined that the harvesting clutch lever 26 has been operated to the on position [ON], the harvesting clutch control means 73 switches the operating motor 36 to the on side and switches the harvesting clutch 17 to the on state.
When it is determined that the cutting clutch lever 26 has been operated to the cut position [OFF], the cutting clutch control means 73 switches the operation motor 36 to the cutting side and switches the cutting clutch 17 to the cutting state.

  The state setting means 75 sets a moving traveling state, a standard cutting state, and a low-speed cutting state as states to be set in the traveling machine body. FIG. 5 is an explanatory diagram showing a traveling state, a standard cutting state, and a low-speed cutting state. As shown in this figure, in the traveling state, the hydraulic motor 7M of the traveling transmission 7 is switched to the high speed position, the cutting clutch 17 is switched to the cutting state, and the cutting transmission 18 is switched to the low speed position. The state is set. The standard cutting state is set to a state in which the hydraulic motor 7M of the traveling transmission 7 is switched to the standard speed position, the cutting clutch 17 is switched to the on state, and the cutting transmission 18 is switched to the low speed position. . The low speed cutting state is set to a state in which the hydraulic motor 7M of the traveling transmission 7 is switched to the low speed position, the cutting clutch 17 is switched to the on state, and the cutting transmission 18 is switched to the high speed position.

  When the cutting shift switch 35 and the traveling shift switch 34 are operated, the control device 31 causes the traveling control means 74 to perform traveling control based on commands from the cutting shift switch 35 and the traveling shift switch 34.

  FIG. 11 is a flowchart showing travel control by the travel control means 74. As shown in this figure, when the travel shift switch 34 and the cutting shift switch 35 are operated, the travel control means 74 moves based on information detected by the travel shift sensor 38, the cutting shift sensor 40, and the cutting clutch sensor 62. It is determined whether the running state, the standard cutting state, or the low-speed cutting state is set.

  The travel control means 74 performs standard control when it is determined that the travel shift switch 34 has been operated, and it is determined that the travel travel state has been set for the travel aircraft. When the travel control means 74 determines that the travel shift switch 34 has been operated and determines that the standard cutting state has been set for the traveling machine body, movement by the travel control means 74 and the shift check means 77 described later is performed. Control is transferred to (see FIG. 14). When the travel control means 74 determines that the travel shift switch 34 has been operated, and determines that the low speed cutting state is set in the travel aircraft body, the travel control means 74 uses the travel control means 74 and travel control (to be described later) (See FIG. 14).

  The traveling control means 74 performs low speed control when it is determined that the cutting shift switch 35 has been operated and that the standard cutting state has been set for the traveling machine body. The traveling control means 74 performs standard control when determining that the cutting shift switch 35 has been operated and determining that the low speed cutting state is set in the traveling machine body. The traveling control means 74 performs low speed control when determining that the cutting shift switch 35 has been operated and determining that the traveling state is set in the traveling machine body.

  FIG. 12 is a flowchart showing standard control by the travel control means 74. As shown in this figure, in the standard control by the travel control means 74, the travel control means 74 determines whether or not there has been a state change command by the travel shift switch 34 and the cutting shift switch 35. When the traveling control means 74 determines that the state switching command has been met, the traveling motor 7M of the traveling transmission 7 is switched to the standard speed position, the cutting clutch 17 is switched to the engaged state, and the cutting transmission 18 is moved. Switch to the low speed position.

  FIG. 13 is a flowchart showing the low speed control by the travel control means 74. As shown in this figure, in the low speed control by the traveling control means 74, the traveling control means 74 determines whether or not a state change command has been issued by the traveling shift switch 34 and the cutting shift switch 35. When the traveling control means 74 determines that the state switching command is met, the traveling control device 74 operates the hydraulic motor 7M of the traveling transmission device 7 to switch to the low speed position, switches the cutting clutch 17 to the engaged state, and operates the cutting transmission device 18 at high speed. Switch to the position.

The movement control by the travel control means 74 and the shift check means 77 will be described.
The shift check means 77 is configured to be switchable between a check production state and a check release state. When the shift check unit 77 is switched to the check preparation state, the shift control unit 74 uses the shift control unit 74 to make a check, and the drive control unit 74 switches the hydraulic motor 7M of the drive transmission 7 from the standard speed position and the low speed position to the high speed position. To check that. When the shift control unit 77 switches to the check release state, the shift control unit 77 releases the check production for the travel control unit 77, and the travel control unit 77 switches the hydraulic motor 7M of the travel transmission 7 from the standard speed position and the low speed position to the high speed position. Allow to be manipulated.

  The shift check means 77 is linked to the on switch 65, and based on the information from the on switch 65, determines whether or not the cutting clutch lever 26 is operated to the on position [ON].

  The shift check unit 77 is linked to the stock sensor 78 and the cutting rotation sensor 79, and determines whether or not the cutting unit 2 is working on the basis of information detected by the stock sensor 78 and the cutting rotation sensor 79. To do. That is, when both the stock sensor 78 and the cutting rotation sensor 79 are in the detection state, the shift check unit 77 determines that the cutting unit 2 is working, and the stock sensor 78 and the cutting rotation sensor 79 When both are in a non-detection state, and when at least one of the stock sensor 78 and the cutting rotation sensor 79 is in a non-detection state, it is determined that the cutting unit 2 is not in operation.

  The shift check unit 77 is linked to the connection height sensor 61, and the cutting unit 2 is less than or equal to the set connection height based on the detection information by the connection height sensor 61 and the set connection height by the connection height setting unit 76. It is judged whether it is located in the connection height of.

  FIG. 14 is a flowchart showing movement control by the travel control means 74 and the shift check means 77. As shown in this figure, in the movement control by the travel control means 74 and the shift check means 77, as shown in step 1, the travel control means 74 determines whether or not there has been a state change command by the travel shift switch 34. To do. As shown in steps 1, 2, and 3, when it is determined that the state switching command has been issued, the travel control means 74 switches the cutting clutch 17 to the disconnected state and switches the cutting transmission 18 to the low speed position. .

  As shown in steps 4, 5, and 6, when the shift check unit 77 determines that the cutting clutch lever 26 is operated to the engaged position [ON] and determines that the cutting unit 2 is in operation, Regardless of the connection height of the cutting unit 2, the state is switched to the check production state and used for the check production for the travel control means 74.

  In steps 4 and 5, if the shift check means 77 determines that the reaping clutch lever 26 is in the engaged position [ON], but determines that the reaping portion 2 is not in operation, as shown in step 11. Then, it is determined whether or not the connection height of the cutting unit 2 is equal to or less than the set connection height. As shown in steps 11 and 6, when the shift check unit 77 determines that the coupling height of the cutting unit 2 is equal to or lower than the set rolling height, the shift control unit 77 switches to the check production state and sends the check to the travel control unit 74. To do.

Next, a case where the shift check unit 77 is switched to the check production state will be described.
As shown in steps 7 and 8, the traveling control means 74 determines whether the hydraulic motor 7M of the traveling transmission device 7 is in the standard speed position or the low speed position based on information detected by the traveling shift sensor 38. . As shown in Steps 7 and 9, when the traveling control means 74 determines that the hydraulic motor 7M of the traveling transmission 7 is at the standard speed position, the traveling control means 74 maintains the hydraulic motor 7M at the standard speed position, thereby controlling the shift. The means 77 does not operate the traveling transmission 7 to increase the speed from the standard speed position to the high speed position. As shown in Steps 8 and 10, when the traveling control means 74 determines that the hydraulic motor 7M of the traveling transmission 7 is in the low speed position, the traveling control means 74 maintains the hydraulic motor 7M in the low speed position, and the shift check means 77. Does not speed up the travel transmission 7 from the low speed position to the high speed position.

  The shift check means 77 determines that the cutting clutch lever 26 is not operated to the engaged position [ON] in step 4 and that the connecting height of the cutting unit 2 is not less than the set connecting height in step 11. In this case, as shown in step 12, the state is switched to the check release state, and the check production for the travel control means 74 is released.

  When the speed change forming means 77 is switched to the check release state, as shown in step 13, the travel control means 74 switches the hydraulic motor 7M of the travel transmission device 7 to the high speed position, thereby moving the travel transmission device 7 to the standard speed. Increase the speed from the position or low speed position to the high speed position.

  The linking means 71 is linked to the auto clutch means 70 and linked to the control valve 58 via the control device 31, thereby linking the cutting unit 2 and the travel transmission 7 and lowering the cutting unit 2. The speed change operation of the travel transmission 7 is performed in conjunction with the operation. The linking means 71 is linked to the auto clutch means 70 and linked to the operation motor 36 of the reaping clutch 17 via the control device 31, thereby linking the reaping part 2 and the reaping clutch 17. The switching operation of the cutting clutch 17 is performed in conjunction with the lowering operation 2.

  FIG. 15 is a flowchart showing linkage control by the linkage means 71. As shown in this figure, the linking means 71 determines whether or not there has been an operation to lower the mowing unit 2 to the lowering work height based on the presence or absence of a command from the lowering switch 68 as shown in step 1. As shown in step 2, the linking means 71 determines whether the auto clutch means 70 is on or off based on information from the auto clutch means 70.

A case where the auto clutch means 70 is on will be described.
As shown in steps 2, 3, and 4, when it is determined that the auto clutch means 70 is on, the linkage means 71 operates the lifting cylinder 27 to the lower side to lower the reaping portion 2 to connect the connection height. Based on the detection information by the sensor 61 and the set connection height by the connection height setting means 76, it is determined whether or not the connection height of the cutting unit 2 is equal to or less than the set connection height.
As shown in steps 4, 5, 6, the linking means 71 determines that the connection height of the cutting unit 2 is equal to or less than the set connection height, and based on the information detected by the travel transmission sensor 38, the travel transmission device 7. When it is determined that the hydraulic motor 7M is at the high speed position, the hydraulic motor 7M of the travel transmission 7 is switched to the standard speed position.
As shown in steps 7 and 8, the linking means 71 determines whether or not the hydraulic motor 7M of the travel transmission 7 has been switched to the standard speed position based on the detection information from the travel shift sensor 38, and the hydraulic motor 7M When it is determined that the standard speed position has been switched, the mowing clutch 17 is switched to the engaged state. That is, the linking means 71 decelerates the traveling transmission device 7 and switches the cutting clutch 17 so that the traveling transmission device 7 decelerates from the high speed position to the standard speed position before the cutting clutch 17 is switched to the engaged state. Do.

Next, a case where it is determined in step 2 that the auto clutch means 70 is not on (when the auto clutch means 70 is off) will be described.
As shown in steps 2, 9, and 10, when it is determined that the auto clutch means 70 is not on, the linking means 71 operates the elevating cylinder 27 to the lower side to lower the reaping part 2, and It is determined whether or not the connection height is equal to or less than the set connection height.
As shown in steps 10 and 11, when the linking means 71 determines that the connection height of the cutting unit 2 is equal to or less than the set connection height, the cutting clutch 2 is engaged based on information detected by the cutting clutch sensor 62. It is determined whether or not.
As shown in steps 11, 12, and 13, the linking means 71 determines that the mowing clutch 17 is in the engaged state, and the hydraulic motor 7 </ b> M of the traveling transmission device 7 is positioned at the high speed position based on information detected by the traveling transmission sensor 38. If it is determined that the vehicle speed is within the range, the hydraulic motor 7M of the traveling transmission 7 is switched to the standard speed position to decelerate the traveling transmission 7 from the high speed position to the standard speed position.
Even when it is determined in steps 10 and 11 that the connection height of the cutting unit 2 is equal to or less than the set connection height, when it is determined that the cutting clutch 17 is not in the engaged state (when the cutting clutch 17 is in the disconnected state), As shown in steps 14 and 15, the linking means 71 operates at a high speed without decelerating the traveling transmission device 7 by maintaining the hydraulic motor 7M at the high speed position even when the hydraulic motor 7M of the traveling transmission device 7 is in the high speed position. Keep in position.

  That is, when the harvesting work is performed using the work form shown in FIG. 16, the traveling shift switch 34 or the cutting shift switch 35 is operated. Then, the cutting clutch 17 is switched to the engaged state by the traveling control means 74, and the cutting transmission device 18 is switched to the low speed position or the high speed position by the traveling control means 74, so that the cutting section 2 can be driven. Further, the traveling control means 74 switches the hydraulic motor 7M of the traveling transmission 7 to the standard speed position or the low speed position, and the traveling apparatus 1 is driven at the standard speed or the low speed. It is possible to carry out the work at a standard speed suitable for cutting, or at a low speed suitable for harvesting planted cereals with severe lodging.

  When the work travel for the work target row on one end side and the other end side of the uncut ground 81 is finished and the travel travel ground 82 is reached, the auto switch 30 is operated to the ON state [ON], and the cutting clutch lever 26 is turned on. When it is operated to [ON] (the auto clutch means 70 is turned on), the elevating lever 29 is operated to the raised position [U]. Then, the cutting part 2 is lifted by the auto clutch means 70 and the cutting clutch 17 is switched to the disengaged state, so that the cutting part 2 can be moved to a non-working height and stopped and stopped.

  At this time, the travel shift switch 34 is operated. If the cutting unit 2 is not in operation and the cutting unit 2 has a connection height that is higher than the set connection height, the shift check unit 77 is switched to the check release state, and the travel control unit 74 sets the travel transmission device. The hydraulic motor 7M is switched to the high speed position, and the traveling device 1 is driven by the traveling transmission 7 that has reached the high speed position, so that the traveling traveling can be performed at a higher speed than the working traveling.

  However, when the cutting unit 2 is working, and when the cutting unit 2 has a low connection height equal to or lower than the set connection height even when the cutting unit 2 is not working, the travel shift switch 34 is operated. However, the shift check means 77 is in the check production state, and the travel control means 74 maintains the hydraulic motor 7M of the travel transmission 7 at the low speed position or the standard position, so that it cannot travel at a higher speed than the work travel.

  When the work travel is finished and the mobile travel location 82 is reached, when the auto switch 30 is operated to the off state [OFF] (the auto clutch means 70 is off), the elevating lever 29 is raised to the position [U]. And the travel shift switch 34 is operated. Then, the cutting unit 2 is lifted by the cutting unit lifting and lowering means 72, and the cutting clutch 17 is switched to the disengaged state by the travel control unit 74. The cutting unit 2 is moved to the non-working height and stopped while moving. Can be done.

  At this time, even when the cutting clutch lever 26 is operated to the cut position [OFF], and even when the cutting clutch lever 26 is operated to the input position [ON], the cutting unit 2 is not in operation and the cutting unit 2 is a connection height higher than the set connection height, the shift check means 77 is switched to the check release state, and the travel control means 74 switches the hydraulic motor 7M of the travel transmission 7 to the high speed position. Thus, the traveling device 1 is driven by the traveling transmission 7 that has reached the high-speed position, and the traveling traveling can be performed at a higher speed than the working traveling.

  However, when the cutting clutch lever 26 is in the engaged position [ON] and the cutting unit 2 is in operation, the cutting clutch lever 26 is in the input position [ON] and the cutting unit 2 is not in operation. When the portion 2 has a connection height lower than the set connection height, even if the travel shift switch 34 is operated, the shift check means 77 is in the check production state and the travel control means 74 causes the travel transmission device 7 to The hydraulic motor 7M is maintained at the low speed position or the standard position, and cannot travel at a higher speed than the work travel.

  When the mobile travel at the mobile travel location 82 is finished and the operation travel to the work target row on one end side and the other end side of the uncut ground 81 is started, the auto switch 30 is operated to the ON state [ON], and the cutting clutch lever 26 is operated. Is operated to the on position [ON] (the auto clutch means 70 is on), the elevating lever 29 is operated to the lowered position [D]. Then, the cutting part 2 is lowered by the auto clutch means 70 and the cutting clutch 17 is switched to the engaged state, so that the cutting part 2 reaches the lowering work height and is driven to be able to work.

  At this time, when the cutting part 2 reaches the lowering work height, the hydraulic motor 7M of the travel transmission 7 is switched from the high speed position to the standard speed position by the linkage means 71, and the travel transmission 7 is changed from the high speed position to the standard speed position. Decelerated. Further, the linkage means 71 switches the hydraulic motor 7M to the standard speed position before switching the mowing clutch 17 to the engaged state, so that the mowing clutch 17 is engaged after the hydraulic motor 7M switches to the standard speed position. The traveling device 1 can be driven by decelerating from the high speed to the standard speed while avoiding the situation where the hydraulic motor 7M of the traveling transmission 7 is in the high speed position and the cutting unit 2 is driven at high speed. Work travel can be performed at a standard speed suitable for cutting by the unit 2.

  When the auto switch 30 is operated to the off state [OFF] (the auto clutch means 70 is off) when the mobile travel is finished and the work travel is started, the auto switch 30 is operated to the on state [ON]. At the same time, the cutting clutch lever 26 is operated to the engaged position [ON] and the elevating lever 29 is operated to the lowered position [D], or the elevating lever 29 is operated to the lowered position [D] and the travel shift switch 34 is operated. Manipulate.

  When the auto switch 30 is operated to the ON state [ON] and the cutting clutch lever 26 is operated to the on position [ON] and the elevating lever 29 is operated to the lowered position [D], the auto clutch means 70 causes the cutting unit 2 to When the lowering operation is performed, the cutting clutch 17 is switched to the engaged state, and the cutting unit 2 reaches the lowering operation height and is driven to be able to work.

  At this time, when the cutting part 2 reaches the lowering work height, the hydraulic motor 7M of the travel transmission 7 is switched from the high speed position to the standard speed position by the linkage means 71, and the travel transmission 7 is decelerated from the high speed position to the standard speed position. Is done. Further, the linkage means 71 switches the hydraulic motor 7M to the standard speed position before switching the mowing clutch 17 to the engaged state, so that the mowing clutch 17 is engaged after the hydraulic motor 7M switches to the standard speed position. The traveling device 1 can be driven by decelerating from the high speed to the standard speed while avoiding the situation where the hydraulic motor 7M of the traveling transmission 7 is in the high speed position and the cutting unit 2 is driven at high speed. Work travel can be performed at a standard speed suitable for cutting by the unit 2.

  When the elevating lever 29 is operated to the lowered position [D] and the travel shift switch 34 is operated, the mowing unit 2 is lowered by the mowing unit elevating means 72, and the mowing clutch 17 is switched to the engaged state by the traveling control means 74. Then, the cutting transmission 18 is operated to the low speed position by the traveling control means 74, and the cutting unit 2 is driven to the lowering operation height and driven to perform the operation traveling.

  At this time, when the cutting part 2 reaches the lowering work height, the hydraulic motor 7M of the travel transmission 7 is switched from the high speed position to the standard speed position by the linkage means 71, and the travel transmission 7 is decelerated from the high speed position to the standard speed position. Is done. Further, the linkage means 71 switches the hydraulic motor 7M to the standard speed position before switching the mowing clutch 17 to the engaged state, so that the mowing clutch 17 is engaged after the hydraulic motor 7M switches to the standard speed position. The traveling device 1 can be driven by decelerating from the high speed to the standard speed while avoiding the situation where the hydraulic motor 7M of the traveling transmission 7 is in the high speed position and the cutting unit 2 is driven at high speed. Work travel can be performed at a standard speed suitable for cutting by the unit 2.

  When traveling on the road, the mowing unit 2 is set to a relatively low connection height that is less than or equal to the set connection height so that the height of the center of gravity of the harvesting and harvesting machine as a whole is lowered, and the vehicle travels at a higher speed than the operation travel. Even so, since there is no unevenness on the traveling ground or only a small amount, it is difficult for large vibrations to occur in the reaping part 2, and grounding troubles in the reaping part 2 are unlikely to occur. In such a case, if the reaping clutch 17 is in the disengaged state, the reaping portion 2 is set to a connection height lower than the set connection height while the hydraulic motor 7M of the traveling transmission device 7 is operated to the high speed position. The traveling device 1 is driven by the traveling transmission 7 in which the hydraulic motor 7M is maintained at the high speed position and is maintained at the high speed position without the switching operation of the hydraulic motor 7M being performed to the standard speed position by the linkage means 71. Can be performed at a higher speed than the work travel.

[Another embodiment]
Instead of the configuration in which the traveling transmission 1 is shifted by the shift operation of the hydraulic motor 7M of the traveling transmission 7 in order to reveal the moving traveling state, the standard cutting state, and the low-speed cutting state as in the above-described embodiment, the traveling transmission device is changed. 7 is configured to shift the travel transmission 1 by a shift operation of the hydraulic pump 7P, or a configuration in which a travel transmission for sub-transmission is provided separately from the travel transmission 7, and the shift transmission for the sub-shift is operated. It may be adopted and implemented.

  INDUSTRIAL APPLICABILITY The present invention can be used not only for harvesting harvesters that harvest cereal grains such as rice and wheat but also for harvesting harvesters that target various crops such as weeds.

DESCRIPTION OF SYMBOLS 1 Traveling device 2 Cutting part 7 Traveling transmission device 17 Cutting clutch
70 auto clutch means 71 linkage means

Claims (4)

A traveling transmission device is connected to the traveling machine body so as to be movable up and down to a non-working height and a lowering work height, and a traveling transmission device that drives the traveling device of the traveling machine at a variable speed; a cutting clutch that engages and disengages transmission to the cutting unit; A harvesting and harvesting machine equipped with
When the cutting part is lowered to the lowering work height in the on state, the cutting clutch is operated to be in the on state, and even when the cutting part is lowered to the lowering work height in the off state, Auto clutch means for not operating the mowing clutch in the engaged state;
As the traveling speed change device is deceleration operation from the setting speed position by the operation of lowering the reaper in the descending working height, and linkage means capable Rukoto is linked with said traveling speed change device and the reaper, with a,
When the auto clutch means is in the on state, when the reaping part is operated to be lowered to the lowering work height, the reaping clutch is operated to be in an engaged state, and the traveling transmission is set to the set high speed position. Is decelerated from
Even when the auto-clutch means is in the off state, the harvesting harvester is configured such that the travel transmission is decelerated from the set high speed position when the trimming unit is lowered to the lowering work height. Machine. When the auto clutch means is in the off state, the linkage means is configured to maintain the traveling transmission device at the set high speed position regardless of the lowering operation of the reaping portion when the reaping clutch is disengaged. The harvesting and harvesting machine according to claim 1. A traveling transmission device is connected to the traveling machine body so as to be movable up and down to a non-working height and a lowering work height, and a traveling transmission device that drives the traveling device of the traveling machine at a variable speed; a cutting clutch that engages and disengages transmission to the cutting unit; A harvesting and harvesting machine equipped with
When the cutting part is lowered to the lowering work height in the on state, the cutting clutch is operated to be in the on state, and even when the cutting part is lowered to the lowering work height in the off state, Auto clutch means for not operating the mowing clutch in the engaged state;
Linking means capable of linking the cutting unit and the traveling transmission so that the traveling transmission is decelerated from a set high-speed position by an operation of lowering the cutting unit to the lowering work height. Prepared,
When the auto clutch means is in the on state, when the reaping part is operated to be lowered to the lowering work height, the reaping clutch is operated to be in an engaged state, and the traveling transmission is set to the set high speed position. Is decelerated from
Even when the auto-clutch means is in the off state, the travel transmission device is configured to be decelerated from the set high-speed position when the cutting part is operated to be lowered to the lowering work height.
When the auto clutch means is off, the linking means is configured to maintain the traveling transmission device at the set high speed position regardless of the lowering operation of the reaping portion when the reaping clutch is disengaged. Harvester. The travel transmission device has a standard position for driving the travel device at a speed suitable for work travel, and a low speed for driving the travel device at a speed suitable for work travel and lower than the speed corresponding to the standard position. The position can be switched between a speed suitable for moving travel and a high speed position for driving the travel device at a speed higher than the speed corresponding to the standard position,
2. The travel transmission device is configured to be decelerated from the high speed position to the standard position only when the high speed position corresponds to the set high speed position and the travel transmission device is at the high speed position. The harvesting and harvesting machine according to any one of 3 above.

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