JP6961472B2 - combine - Google Patents

Description

The present invention relates to a combine that performs harvesting and threshing work, and more particularly to a combine that includes a grain storage unit that stores grains and a grain discharge device that discharges the stored grains to the outside of the machine.

In general, ordinary type and self-removing combine harvesters are provided with a harvesting section for harvesting grain harvesters, a threshing section for threshing the harvested grain harvesters, and a grain storage section for storing the threshed grains. , These are driven by the power of the engine mounted on the machine body, and for example, the harvesting work is performed while traveling by the crawler traveling device. When the harvested grains are full in the grain storage section, the grain discharge device is driven to discharge the grains from the grain storage section to a container or the like installed on the truck bed.

In addition, in such a combine, automation of each part of the machine is progressing, for example, direction automatic control, cutting slide, handling depth automatic control, cutting automatic clutch, cutting height automatic control, automobile speed control, automatic accelerator control, automatic threshing. Control, automatic horizontal control, automatic discharge auger turning control, alarms for each part, emergency stop of the engine, etc. are performed using an electronic control device composed of a microcomputer.

On the other hand, in agricultural machinery powered by a prime mover (engine, etc.), not limited to the combine, if the traveling device or work part is activated when the prime mover is started, there is a risk of leading to an accident, and the safety of the agricultural machine. In the appraisal, in order to avoid such a situation, it is stipulated as a standard to install a safety device (engine start safety device) that prevents the working part from operating when the prime mover is started.

Regarding the engine start safety device, the combine has adopted a structure in which the engine cannot be started unless the clutch of the working part is disengaged and the traveling transmission is neutralized or the main clutch is disengaged. It is known that the engine cannot be started unless the exhaust clutch is disengaged (see, for example, Patent Document 1).

Furthermore, looking at the control technology related to the grain discharge device, since the grain discharge device is generally driven by the power of the engine, the discharge capacity of the grain discharge device decreases when the engine speed is low when the grain is discharged. However, there is a problem of causing clogging of grains. Therefore, it is known that a warning device issues a warning when the engine speed is equal to or less than the specified speed when the grains are discharged (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2015-89339 Japanese Unexamined Patent Publication No. 2008-136438

As mentioned above, in the combine, it is necessary to provide an engine start safety device in order to work safely. Therefore, a traveling clutch that transmits power from the engine to the traveling transmission, a working machine clutch that transmits power to the grain removal section and the cutting section, or a clutch pedal that intermittently operates the discharging clutch that transmits power to the grain discharging device. The clutch lever is provided with switches to detect the disengaged state, and these switches are connected in series to the engine start safety circuit so that one of the switches is not closed (the clutch is not disengaged). Prevents the engine from starting.

Further, regarding the grain discharge device, in order to prevent clogging at the time of grain discharge, a switch (grain discharge switch) for detecting the engaged state is provided in the discharge clutch lever that intermittently operates the discharge clutch, and this detection is provided. When the switch is closed (the clutch is engaged) and the engine speed is less than the specified speed at that time, the electronic control device warns this.

In this case, regarding the grain discharge device, there are two detection switches provided in the discharge clutch lever of the grain discharge device, a switch used for the engine start safety circuit and a switch used for the electronic control device for issuing an alarm or the like. A switch is needed.

That is, since the detection switch generally used in the engine start safety circuit is used by being connected in series with another switch such as a clutch pedal switch, the electronic control device also serves as the detection switch used in the engine start safety circuit. For example, it cannot be used as it is by connecting it to a digital input port having a pull-up resistor.

In addition, a detection switch provided on the discharge clutch lever is connected to a digital input port equipped with a pull-up resistor of an electronic control device, and an alternative relay provided in, for example, an engine start safety circuit is controlled via this electronic control device. The engine start safety circuit can be configured.

However, in this case, since the glow plug and starter motor are energized when the engine is started, the power supply voltage supplied to the electronic control device tends to become unstable, which causes the electronic control device to run away or be controlled by a brownout reset or the like. Since it is delayed, the relay control of the electronic control device becomes uncertain, and the reliability of the engine start safety circuit is impaired.

Moreover, even if the electronic control device that controls each part of the aircraft breaks down, if the engine can be started and the traveling transmission can be operated mechanically, the combine can be removed from the field without getting stuck. You can escape and repair the failure. Therefore, it is desirable that the engine start safety circuit be separated from the electronic control device to be a conventional reliable and simple circuit that is not affected by these.

Therefore, in view of the above problems, the present invention provides a switch for detecting the on / off operation of the discharge clutch lever for discharging the grains to the outside of the machine, and uses this switch for the engine start safety circuit or the grains. When used in an electronic control device to warn of insufficient engine speed when ejecting grains, it is necessary to configure the engine start safety circuit with the same reliability as before without preparing two switches separately. It is an object of the present invention to provide a combine capable of giving an alarm of insufficient engine speed without any trouble.

In order to solve the above-mentioned problems, the present invention firstly comprises a harvesting unit for cutting the grain clutch in the field, a grain removal section for removing the harvested grain clutch, and a grain storage section for storing the degrained grain. A combine equipped with a grain discharge device that discharges the stored grains to the outside of the aircraft, and drives them by the power of the engine mounted on the aircraft, while also providing an engine start safety device and an electronic control device that controls each part of the aircraft. in the grain discharge device includes a discharge clutch lever for intermittently emissions clutch, comprising a limit switch comprising a C contact for detecting the switching on and off operations of the discharge clutch lever, starting safety B contact of the limit switch of the engine It is characterized in that the A contact is connected to the circuit of the device and the A contact is connected to the electronic control device, and this is used in each device.

Secondly, the present invention is configured to rotate the discharge clutch lever to the on / off position to engage and disengage the discharge clutch, and a limit switch mounting plate for detecting the on / off operation of the lever. In addition, it is characterized in that a rotation restricting portion at the insertion position of the lever is integrally formed.

Further, in the third aspect of the present invention, one end of the limit switch mounting plate is fixed to the bracket that rotatably supports the discharge clutch lever, and the other end of the bracket and the mounting plate is attached to the support of the auger rest. It is characterized by sticking to.

Fourth, in the present invention, a plate for providing an auger operation switch assembly is attached to the front portion of the bracket, and the plate covers the upper side of the limit switch and the attachment plate, and the auger operation switch assembly and the wire of the limit switch. The harness is fixed to the mounting plate of the limit switch by using a clamp.

According to the combine of the present invention, a harvesting section for cutting the grain clutch in the field, a grain removal section for removing the harvested grain clutch, a grain storage section for storing the degrained grain, and a stored grain are used as a machine. In a combine equipped with a grain discharging device for discharging to the outside and driving them by the power of an engine mounted on the aircraft, while providing a start safety device for the engine and an electronic control device for controlling each part of the aircraft, the grain discharging device is provided. apparatus, a discharge clutch lever for intermittently emissions clutch, comprising a limit switch comprising a C contact for detecting the switching on and off operations of the discharge clutch lever, the B contact of the limit switch in the circuit of the starter safety device of the engine, also , A contact is connected to an electronic control device, and this is used in each device.

Therefore, the B contact of the limit switch that detects the on / off operation of the discharge clutch lever that discharges grains to the outside of the machine is connected to the circuit of the engine start safety device, and the discharge clutch lever is turned on and the B contact is operated. When opened, the engine cannot be started, and when the discharge clutch lever is disengaged and the B contact is closed, the engine is allowed to start, whereby the grain discharge work can be performed safely. Further, the A contact of the limit switch is connected to the input circuit of the electronic control device. For example, when the discharge clutch lever is engaged and the A contact is closed, it is determined that the grain discharge has started, and the engine at that time. It is possible to warn about insufficient rotation speed of the engine.

Further, a limit switch having a C contact for detecting the on / off operation of the discharge clutch lever is distributed to the A contact and the B contact, respectively, to the circuit of the engine start safety device and the electronic control device that controls each part of the airframe to interfere with each other. It is not necessary to prepare two detection switches to detect the on / off operation of the discharge clutch lever, and even if the detection switch is installed and adjusted, only one can be adjusted, so the working time is Can be shortened, and the overall cost can be reduced.

Further, the discharge clutch lever is rotated to the on / off position to interrupt the discharge clutch, and the limit switch mounting plate for detecting the on / off operation of the lever is rotated at the lever on position. If the motion control portion is integrally formed, it is not necessary to provide a rotation restricting body at the lever entry position separately from the limit switch mounting plate, and the discharge clutch lever can be reliably regulated at the entry position.

Then, when one end of the limit switch mounting plate is fixed to the bracket that rotatably supports the discharge clutch lever and the other end of the bracket and the mounting plate is fixed to the auger rest support, the limit switch mounting plate is fixed. Both ends can be fixed to the bracket and the support of the auger rest in a double-sided state, and the limit switch can be firmly attached and supported. Further, the bracket can be reinforced by the mounting plate, and the bending of the bracket due to the load applied when the discharge clutch lever is operated can be suppressed.

In addition, a plate that provides an auger operation switch assembly is attached to the front of the bracket, and this plate covers the upper side of the limit switch and the mounting plate, and the auger operation switch assembly and the wire harness of the limit switch are attached to the limit switch mounting plate. When fixed using a clamp, the limit switch, wire harness, and the like are not exposed to the outside, and the appearance can be improved. Further, the wire harness can be fixed by using the mounting plate, and unexpected cutting of the wire harness can be eliminated.

It is a front view of a combine. It is a top view of the combine. It is a left side view of the combine. It is a right side view of the combine. It is a power transmission diagram of a combine. It is a perspective view which shows the attachment state of the grain discharge clutch lever. It is a front view which shows the attachment state of the grain discharge clutch lever. It is a side view which shows the disengagement operation state of a grain discharge clutch lever. It is a side view which shows the engaging operation state of a grain discharge clutch lever. It is a start safety circuit diagram of an engine.

Embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 5, the combine 1 is composed of a self-removing combine harvester for riding three-row cutting, and is provided with a traveling device below the rectangular body frame (body) 2. The traveling device includes a drive sprocket 4, an idle wheel 5, a track roller 6, and a rubber crawler 7 wound around the drive sprocket 4, an idle wheel 5, and a track roller 6 axially supported by the left and right traveling frames 3 connected below the machine frame 2. It is a crawler type that drives the drive sprocket 4 to run.

Further, a control unit A provided with a driver's seat 9 is provided on the front right side of the body frame 2 in the forward direction of the body, and the cutting section B is raised and lowered by the hydraulic cylinder 10 from the front left side of the body frame 2 to the front of the control part A. Provide freely. Further, a threshing section C is provided on the machine frame 2 on the left side behind the cutting section B, and on the right side of the threshing section C, a grain storage section D composed of a grain tank 11 and grains stored in the grain tank 11 are provided. A grain discharge device E composed of a discharge auger 12 is provided.

Further, a straw waste processing device F composed of a cutter 13 is provided behind the threshing section C and the grain storage section D. Further, a driving unit G is provided between the control unit A and the grain storage unit D, and the diesel engine 14 housed in the driving unit G serves as a power source for driving each unit of the combine 1.

Further, the cutting section B includes a divider 15, a narrow guide 16, a raising device 17, a cutting blade 18, a scraping device 19, a stock source and a tip transfer device 20, and a cutting section frame 21 and a lift frame that support these devices. It is composed of 22 and a transmission device or the like that drives each part. Further, when the cutting clutch 23, which will be described later, is engaged and the engine power is transmitted, the cutting unit B scrapes the scraped culms while causing the fluffy culms that have entered between the dividers 15 at the left and right ends, and also scrapes the scraped culms with a cutting blade. It is cut by 18 and further transported toward the threshing section C while adjusting the handling depth by the stock root and the tip transfer device 20.

The threshing section C is provided with first and second handling chambers on the upper part of the machine frame including the front and rear walls, the left and right side walls, the bottom plate, and the cylinder cover covering the upper part. Among them, in the first handling chamber, a threshing field chain 24 for transporting the culm transported from the cutting section B along the handling port, its holding rail, a first handling cylinder 25 having teeth to be handled, its receiving net, and the like are provided. prepare. In addition, the second handling chamber is attached to the first handling chamber so as to face the rear of the machine from the rear end tip side of the first handling cylinder 25, and the straw mixed with grains that could not be threshed in the first handling chamber. A second handling cylinder 26 for processing waste and the like and a receiving net thereof are provided.

On the other hand, a sorting chamber is provided below the first and second handling chambers. The sorting chamber is provided with a swinging flow plate 27, a swinging flow plate 27, a first spiral 28 and a second spiral 29, a wall insert fan 30, a suction fan 31, and the like, and shakes grains and the like leaking from the receiving net of the handling room. The grains sorted on the flow plate 27 are transferred from the first spiral 28 to the grain tank 11 via the fried grain spiral 32, and the second product mixed with straw dust and the like is the second spiral 29 to the second spiral. It is returned to the oscillating flow plate 27 via the reduction spiral 33. Further, the straw debris reaching the end of the rocking flow plate 27, the straw debris captured by the suction fan 31, or the straw debris discharged from the end of the second handling cylinder 26 are discharged to the outside of the machine behind the threshing section C. do. The threshing section C is driven by the power of the engine 14 transmitted via the threshing clutch 34.

Further, the grain tank 11 constituting the grain storage unit D temporarily stores the grains transferred from the threshing unit C via the fried grain spiral 32, and the fried grain spiral 32 is fried as shown in FIG. It is housed in a cylinder 35, and grains are discharged into a resin-made grain tank 11 from a discharge port 36 provided in the upper part of the threshing cylinder 35.

Further, the grain discharge device E includes a horizontal spiral 35 provided at the bottom of the grain tank 11 and a discharge auger 12 including a vertical spiral 36 that feeds grains sent from the horizontal spiral 35 upward and discharges the grains to the outside of the machine. A power transmission device that drives the discharge auger 12 by the power of the engine 14, a swivel mechanism that swivels the discharge auger 12 by rotating a first vertical pipe 37 accommodating the vertical spiral 36 of the discharge auger 12 by a swivel motor. The second vertical pipe 38 accommodating the vertical spiral 36 of the discharge auger 12 and the third vertical pipe 39 are moved up and down by a lifting motor to raise and lower the discharge auger 12.

When the second vertical pipe 38 and the third vertical pipe 39 of the discharge auger 12 are stored on the machine body, the auger rest 40 supports the middle part of the second vertical pipe 38, and the third vertical pipe 38 is also supported. The vertical pipe 39 can be folded so as to be attached to the second vertical pipe 38 when traveling on a road or the like.

The straw waste processing device F includes a disc type cutter 13, which receives the culm discharged from the handling room by the straw discharge transport device 41 after completing the threshing process, and scrapes the saw blade and the culm. The culm is shredded by a board and released as cut straw to the site where it was cut. The straw waste processing device F is driven from the threshing section C, and is driven from the engine 14 together with the threshing section C via the threshing clutch 34.

Further, the control unit A is provided with a front console 42 and a side console 43 from the front to the left side of the driver's seat 9, of which the front console 42 includes a multi-steering lever 44, a combination switch 45, an automatic switch 46, or an automatic switch 46. A key switch 47 or the like is provided. Further, the other side console 43 with the instrument panel 48 interposed therebetween is provided with a main shift lever 49, an auxiliary shift lever 50, an engine control lever 51, a threshing / cutting clutch lever 52, and the like.

A brake pedal 54 is provided on the floor 53 below the front console 42, and when the brake pedal 54 is stepped on, the main shift lever 49 returns to "neutral" via the main shift return rod, and the brake provided on the transmission 8 is provided. Operate 55. Further, the brake 55 can also be operated by a parking brake lever 56 provided on the side of the brake pedal 54, and in this case, it becomes a parking brake.

Then, each part such as the cutting part B and the threshing part C configured as described above is driven by the diesel engine 14 housed in the driving part G as shown in FIG. That is, each device of the threshing section C and the straw waste processing device F excluding the threshing feed chain 24 is driven from the engine 14 via the threshing clutch 34 composed of the belt tension clutch. Further, the threshing feed chain 24 is driven from the threshing clutch 34 via the transfer HST (hydrostatic continuously variable transmission) 57, and further, from the transfer HST 57 via the cutting clutch 23 composed of the belt tension clutch, the cutting section B Drive each device.

Further, the diesel engine 14 drives a crawler type traveling device, and the power transmitted from the engine 14 via the traveling belt 58 is changed by the traveling HST (hydrostatic continuously variable transmission) 59. The transmission 8 is provided with an auxiliary transmission 60 that uses a gear transmission to shift two speeds between standard, running, and neutral, and a steering device that includes a hydraulic clutch 61, a brake 55, left and right side clutches 62, and the like. The crawler 7 is driven by each drive sprocket 4. Further, the engine 14 drives the horizontal spiral 35 and the vertical spiral 36 of the discharge auger 12, and the transmission belt 63 for driving the horizontal spiral 35 and the vertical spiral 36 from the engine 14 is provided with a discharge clutch 64.

Next, the discharge clutch 64 will be described. As shown in FIGS. 4 and 6 to 9, the discharge clutch 64 is composed of a belt tension clutch, and the tight arm 65 whose base is rotatably supported by the machine body is the same. A tight pulley 66 is rotatably supported at the tip. Further, when one end of the control wire 68 is connected to the tight arm 65 via a spring 67 and the control wire 68 is pulled, the tight pulley 66 is hung on the drive pulley 69 and the driven pulley 70 provided on the output shaft of the engine 14. The transmission belt 63 is strained to drive the horizontal spiral 35 and the vertical spiral 36 from the engine 14.

On the other hand, the other end of the control wire 68 is connected to the base plate 72a of the discharge clutch lever 72 via a plate 71 that is curved in an arc shape. Further, the discharge clutch lever 72 rotatably supports the base plate 72a of the exhaust clutch lever 72 by using a mounting bolt 75 on a bracket 74 provided on a support column 73 of the organ rest 40 behind the driver's seat 9. Both ends of the outer of the control wire 68 are fixed to the fried grain cylinder 35 and the outer receivers 76 and 77 fixed to the columns 73, respectively, via adjusters.

The discharge clutch lever 72 has an operating rod 72c to which a grip 72b is attached to its tip fixed to a base plate 72a, and a contact portion 72d for operating an actuator of a limit switch 78, which will be described later, is perpendicular to the base plate 72a. It is formed by bending it into a right angle. Further, the bracket 74 has a top plate portion 74a that is fixed to the support column 73 by welding the front portion thereof, a side plate portion 74b formed by bending the left end side of the top plate portion 74a downward, and a top plate portion 74a. A guide groove 74c is provided near the front part of the left end of the.

Therefore, the discharge clutch lever 72 is rotatably attached to the side plate portion 74b of the bracket 74 in the front-rear direction, and the upper side of the operating rod 72c and the grip 72b project from the guide groove 74c of the bracket 74, and the rotation shaft thereof. The branch (base plate 72a) is hidden by the top plate portion 74a and the side plate portion 74b.

Further, the bracket 74 is provided with a limit switch 78 for detecting an on / off operation of the discharge clutch lever 72. The limit switch 78 is a push plunger type limit switch having a C contact, and the actuator of the limit switch 78 discharges a clutch lever to a mounting plate 79 whose left end is welded and fixed to the lower front portion of the side plate portion 74b. It is attached so that it faces the contact portion 72d of 72 so that it can be moved forward and backward.

The side plate portion 74b of the mounting plate 79 and the right end side opposite to the side plate portion 74b are welded to the front surface of the support column 73. Therefore, both the left and right ends of the mounting plate 79 are fixed to the bracket 74 and the support column 73 in a double-held state, and the limit switch 78 can be firmly mounted and supported. Further, the bracket 74 is reinforced by the mounting plate 79, and the bending of the bracket 74 due to the load (belt tension load) applied when the discharge clutch lever 72 is operated can be suppressed.

Further, the upper part on the left side of the mounting plate 79 is bent forward to integrally form the rotation restricting portion 79a at the insertion position of the discharge clutch lever 72. Therefore, when the discharge clutch lever 72 is rotated in the forward direction in which the discharge clutch 64 is engaged, the operating rod 72c comes into contact with the rotation restricting portion 79a to prevent further rotation. Then, even if the discharge clutch lever 72 is released from the discharge clutch lever 72 in this state, the discharge clutch lever 72 is held at this engaging position by the belt tension reaction force of the discharge clutch 64.

Therefore, the discharge clutch lever 72 can be reliably regulated and held at the entry position by the rotation restricting portion 79a of the mounting plate 79 without providing a separate rotation restricting body. When the discharge clutch lever 72 is rotated backward in the disengagement operation direction of the discharge clutch 64, the operation rod 72c comes into contact with the end of the guide groove 74c of the bracket 74 to prevent further rotation. This operation position becomes the disengagement operation position of the discharge clutch lever 72.

A cover plate 80 that covers the front surface side of the bracket 74 and hides the limit switch 78 and the like provided below is attached to the front portion of the bracket 74 with bolts. Then, an auger operation switch assembly 81 that instructs the turning and raising / lowering of the discharge auger 12 is attached to the plate 80.

Further, a mounting hole 79b is bored in the mounting plate 79 of the limit switch 78, and the fixed portion of the clamp 82 is pushed into the mounting hole 79b to mount the auger operation switch assembly 81 and the wire harness 83 of the limit switch 78. It is fixed to the mounting plate 79 using 82. Further, the wire harness of the auger storage limit switch provided on the auger rest 40 is similarly fixed to the mounting plate 79 by using the clamp 82.

In this way, a plate 80 for providing the auger operation switch assembly 81 is attached to the front portion of the bracket 74, and the plate 80 covers the upper side of the limit switch 78 and the mounting plate 79, and the auger operation switch assembly 81 and the limit switch 78. When the wire harness 83 is fixed to the mounting plate 79 of the limit switch 78 by using the clamp 82, the limit switch 78, the wire harness 83, and the like are not exposed to the outside, and the appearance can be improved.

Further, the wire harness 83 can be fixed by using the mounting plate 79, and when the grain tank 11 is removed for maintenance, the wire harness 83 may be an obstacle or may be accidentally hooked to cut the wire harness 83. Can be eliminated.

Next, the engine start safety device of the combine 1 and the electronic control device that controls each part of the airframe will be described. As shown in the electric circuit diagram of FIG. 10, a key switch 47 (OFF, off,) is attached to the positive terminal of the battery 84 mounted on the airframe. Operation, glow, start) are connected via the main fuse 85. Then, the coil portion of the engine starter relay 87, the contact of the pedal switch 88, the B contact 78b of the limit switch 78, and the grain removal / cutting clutch lever switch 89 are connected to the start terminal (ST) of the key switch 47 via the start relay power fuse 86. B contact 89b and the contact of the degraining position detection switch 90 are connected in series and dropped to the ground.

Then, in this case, when the key is turned to the starting position to connect the battery 84 and the starting terminal of the key switch 47, the contact of the pedal switch 88, the B contact 78b of the limit switch 78, and the B contact of the grain removal / cutting clutch lever switch 89 are connected. When both the contacts of 89b and the degraining position detection switch 90 are closed, the contacts of the engine starter relay 87 are closed and the engine starter motor 91 is driven, whereby the engine 14 is started.

However, if any of the contact of the pedal switch 88, the B contact 78b of the limit switch 78, the B contact 89b of the threshing / cutting clutch lever switch 89, and the contact of the threshing cutting position detection switch 90 is open, the starter motor 91 will start. It is not driven and the start of the engine 14 is blocked.

Here, supplementing each switch provided in the start safety circuit of the engine, the pedal switch 88 is a switch (normally open type) having an A contact attached to the brake pedal 54, and when the brake pedal 54 is stepped on, the switch is switched. A contact closes. Then, as described above, when the brake pedal 54 is stepped on, the main shift lever 49 returns to "neutral" and the brake 55 is activated. Therefore, as long as the brake pedal 54 is stepped on, the combine 1 will be activated even if the engine 14 is started. It does not start and keeps running stopped. On the contrary, if the engine 14 is erroneously started without depressing the brake pedal 54, there is a risk of sudden start depending on the shift position of the main shift lever 49.

Further, the limit switch 78 detects the engagement operation of the discharge clutch lever 72, and the B contact 78b (normally closed type) is opened by the engagement operation of the discharge clutch lever 72. Therefore, the discharge clutch lever 72 is engaged and the discharge is performed. When the clutch 64 is engaged, the start of the engine 14 is prevented, and the discharge auger 12 operates at the same time as the start of the engine 14 to prevent problems such as scattering grains in the field or the like.

Further, the threshing / cutting clutch lever switch 89 is a switch provided on the threshing / cutting clutch lever 52 and provided with a C contact similar to the limit switch 78. When the threshing / cutting clutch lever 52 is turned on and operated, the B contact is provided. 89b opens and A contact 89a closes.

Then, the A contact 89a of the grain removal / cutting clutch lever switch 89 is connected to the input port and the ground of the electronic control device configured by the microcomputer unit 92, and the microcomputer unit 92 enters the grain removal / cutting clutch lever 52 by this switch 89. When the operation is detected, the microcomputer unit 92 activates a drive mechanism composed of an electric motor or the like to engage the grain removal clutch 34.

Further, for example, when the microcomputer unit 92 is lowered from the non-working position where the cutting portion B is raised to a predetermined working position by the lowering operation of the multi-steering lever 44, the above-mentioned drive mechanism is operated to activate the threshing clutch. The cutting clutch 23 is engaged together with 34. On the contrary, when the threshing / cutting clutch lever 52 is turned off and the microcomputer unit 92 detects this by the threshing / cutting clutch lever switch 89, the drive mechanism composed of an electric motor or the like is operated to operate the threshing clutch 23. The threshing clutch 34 is disengaged together.

The threshing cut position detection switch 90 is a switch (normally open type) provided with an A contact attached to a drive mechanism configured by the electric motor or the like, and when the drive mechanism turns off the threshing clutch 34, the A contact of the switch is provided. Closes. Therefore, if both the B contact 89b of the threshing / cutting clutch lever switch 89 and the A contact of the threshing cutting position detection switch 90 are closed, the threshing clutch 23 and the threshing clutch 34 are surely disengaged. Even if the engine 14 is started, the cutting section B, the threshing section C, and the straw waste processing device F are not driven, so that it is safe.

It should be noted that determining the on / off state of the cutting clutch 23 and the threshing clutch 34 by the two switches 89 and 90 in this way is to ensure the reliability of the disengaged state of the clutches 23 and 34. For example, even if the A contact of the threshing cut position detection switch 90 is closed, the threshing / cutting clutch lever 52 may be engaged and operated, and then the A contact of the switch 90 may open due to a time lag of the drive mechanism or the like. No.

On the contrary, even if the threshing / cutting clutch lever 52 is disengaged, the clutches 23 and 34 cannot be disengaged immediately due to a time lag of the drive mechanism or the like. Therefore, if it is determined by any one of the switches in this way, the threshing clutch 34 and the cutting clutch 23 may be engaged at the start of the engine 14 to drive the threshing section C and the like, and such a danger may be caused by the two switches. Avoid by using 89, 90.

Then, the combine 1 constituting the engine start safety device (starting safety circuit) as described above enables the engine 14 to be started on the condition that all the clutches are disengaged when the vehicle is stopped. After the engine 14 is safely started, the engine 14 can be run or each clutch is engaged to perform cutting work and grain discharging work.

Next, the method of using the A contact 78a of the limit switch 78 described above will be described. The A contact 78a is connected to the port and ground of the input circuit of the microcomputer unit 92, and the microcomputer unit 92 is discharged by the switch 78. When the entry operation of the lever 72 is detected, the microcomputer unit 92 acquires and monitors the rotation speed of the engine 14 by, for example, a pickup sensor or the like.

Then, if the rotation speed of the engine 14 does not reach the minimum rotation speed at the time of grain discharge, or if the rotation speed of the engine 14 drops extremely with the engagement of the discharge clutch 64, the instrument of the control unit A is used. The engine load lamp provided on the panel 48 is blinked, or an electronic buzzer or the like is used to notify this. Further, the operator notices that the engine 14 is overloaded by this, and operates the engine control lever 51 to increase the engine speed to eliminate the overload.

Therefore, it is possible to prevent insufficient discharge capacity of the discharge auger 12 due to insufficient rotation speed of the engine 14, clogging of grains, engine stall, etc., and to smoothly perform the grain discharge work. Further, the limit switch 78 having the C contact for detecting the on / off operation of the discharge clutch lever 72 is used for the engine start safety circuit, and the B contact 78b is used for the electronic control device 92 for controlling each part of the airframe. Uses the A contact 78a.

Therefore, since the contacts 78a and 78b can be used without electrically interfering with each other, it is not necessary to prepare two detection switches for detecting the on / off operation of the discharge clutch lever 72, and the limit switch 78. Even if the mounting of the (detection switch) is adjusted, only one adjustment is required, so that the working time can be shortened and the cost can be reduced as a whole.

As shown in the circuit diagram of FIG. 10, with the key switch 47 returned to the operating position (IG), the contact portion of the engine stop relay 94 is the battery 84 and the engine stop solenoid 95 via the key cut fuse 93. Connect to. Then, the coil portion of the engine stop relay 94 is connected to the battery 84 and the engine stop output port of the microcomputer unit 92.

Therefore, when the microcomputer unit 92 outputs to the engine stop output port and operates the engine stop relay 94 with the key switch 47 in the off position or in the operating position, the engine stop solenoid 95 is in the coil portion thereof. The power supply to the engine is cut off, and the engine 14 is stopped. Then, the microcomputer unit 92 stops the engine when, for example, the grain tank 11 is full of grains, the straw discharging device 41 is clogged with straw, or the cutting section B or the threshing field chain 24 is clogged with grain culms. It outputs to the output port and forcibly stops the engine 14.

Therefore, by utilizing the connection of the limit switch 78 with the microcomputer unit 92 described above, for example, when the grain clogging of the discharge auger 12 is detected during the grain discharge operation in which the discharge clutch 64 is engaged, the engine 14 may be forced to stop in the same manner. Further, even if a grain flow sensor (impact sensor) is attached to the discharge auger 12, the cumulative amount of discharged grains from the engagement of the discharge clutch 64 to the disengagement is displayed on the liquid crystal display of the instrument panel 48. Often, its use is not limited to engine load alarms, and it can be used for many purposes.

Although the embodiment of the present invention has been described above, the discharge clutch 64 does not go in and out directly via the control wire 68 by the discharge clutch lever 72, but the threshing clutch 34 and the cutting clutch 23 are composed of an electric motor or the like. The power clutch type may be used so as to operate the drive mechanism to turn it on and off, and the present invention is not limited to the above embodiment.

1 combine 14 diesel engine (engine)
64 Discharge clutch 72 Discharge clutch lever 78 Limit switch 79 Mounting plate 92 Microcomputer unit (electronic control device)
A Control part B Cutting part C Threshing part D Grain storage part E Grain discharge device

Claims (4)

A harvesting section that cuts the clutches in the field, a grain removal section that removes the harvested grains, a grain storage section that stores the removed grains, and a grain discharge device that discharges the stored grains to the outside of the machine. comprising a, while driving the by the power of the engine to be mounted on the machine body, a starting safety device for an engine, in combine to provide an electronic control device for controlling each section of the airframe, the grain discharge device, interrupt the emissions clutch A limit switch having a discharge clutch lever and a C contact for detecting the on / off operation of the discharge clutch lever is provided. The B contact of this limit switch is used as a circuit of an engine start safety device, and the A contact is used as an electronic control device. A combine characterized by connecting and using this in each device. The discharge clutch lever is rotated to the on and off positions to intermittently operate the discharge clutch, and the limit switch mounting plate for detecting the on / off operation of the lever is rotated at the lever on position. The combine according to claim 1, wherein the regulation unit is integrally formed. The claim is characterized in that one end of a limit switch mounting plate is fixed to a bracket that rotatably supports the discharge clutch lever, and the other end of the bracket and the mounting plate is fixed to a support of an auger rest. The combine described in 2. A plate for providing an auger operation switch assembly is attached to the front part of the bracket, and this plate covers the upper side of the limit switch and the mounting plate, and the auger operation switch assembly and the wire harness of the limit switch are clamped to the limit switch mounting plate. The combine according to claim 3, wherein the combine is fixed by using.

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