JPH0262204B2 - - Google Patents

Description

[Detailed description of the invention]

(a) Industrial Application Field The present invention relates to a position control type transmission device for a combine harvester. (b) Prior Art Conventionally, (a) the reaping device and the traveling device, which are equipped with a grain culm lifting body and a transmission device, are each equipped with separate transmission devices, and when the speed change operating tool of the reaping device is set to high speed, the traveling device changes. A combine harvester that cuts the upper limit of a speed increase signal from a speed change operation tool attached to a continuously variable transmission device to reduce the load on a pulling claw when raising a fallen grain culm, (b) Reaping device and running A combine harvester that synchronizes both the vehicle speed and the reaping device only in a high-speed range, and a combine harvester that drives the vehicle speed and the reaping device via a continuously variable transmission are already known. (c) Problems to be solved by the invention The combine harvester described in (a) above is intended to prevent the load on the lifting claws from becoming excessive when raising lodging grain culms. When harvesting grain culms by raising them, there is a problem in that the raising claws pull up the ears at high speed, which have become soft and broken, resulting in shedding or breakage of the ears, and (b) The combine harvester has a high vehicle speed when harvesting by raising the lodging grain culm,
As the lodging grain culm is not raised sufficiently, a large amount of grain culm is supplied to the threshing device, and the grain culm conveying device and threshing device are overloaded and clogged, making it impossible to thresh. There are problems, and (c)
When a combine harvester reaps and threshes a fallen grain culm, the threshing device is overloaded, so if the vehicle speed is reduced to reduce the amount of grain culm supplied, the grain culm lifting device also slows down, making it difficult to fully collect the grain culm. There were some problems, such as not being able to trigger it. (d) Means for Solving the Problems The present invention provides a system in which a reaping device with a grain culm lifter equipped with a transmission and a traveling device are linked to one continuously variable transmission over the entire speed range. A control circuit of a position control device that is connected to the continuously variable transmission lever and operates the continuously variable transmission to the speed setting position of the continuously variable transmission lever is connected to the control circuit of the position control device that is connected to The above-mentioned problems were solved by inserting a limiting circuit that decelerates the transmission to a set speed and configuring the reaping device and traveling device to operate in conjunction with each other to change speed below the set speed. (e) Effect When the traveling device is driven while driving the working parts such as the reaping device and the threshing device, the reaping device reaps the grain culm while being pulled up by the grain culm pulling body, and this reaped grain culm is harvested in the same way as in a conventional combine harvester. The grain culm is supplied to the threshing device by the grain conveying device and is threshed. If the erect grain culms in the field are standing up in an almost orderly manner, set the transmission of the grain culm lifter to low speed, and operate the continuously variable transmission in that state.
Since the speed of the traveling device and the grain culm lifting body are changed in conjunction with each other from low speed to high speed, reaping and threshing can be performed with high efficiency in an appropriate grain culm lifting state. In addition, when entering from a place where grain culms are upright to a place where they are lying down, if the transmission of the grain culm lifting body is shifted to high speed, the traveling device and the grain culm lifting body are linked by the continuously variable transmission. The speed is automatically reduced to the set speed, and in this state, depending on the degree of lodging of the grain culm,
For example, when the degree of lodging is relatively small, the speed is increased to perform reaping and threshing with high efficiency within the range below the set speed, and when the degree of lodging is high, the continuously variable transmission is operated to decelerate. Even if the grain culm becomes soft or the ear neck is broken, it is possible to reliably raise the grain and reap and thresh while preventing ear breakage and culm breakage. (F) Example An example of the present invention will be explained with reference to the drawings.
Reference numeral 1 denotes a threshing device mounted on one side of the machine base having a traveling device 2, and in front of it, there is a weeding device 3,
3. A reaping device 5 consisting of a grain culm pulling body 4, 4 equipped with a chain with a lug, a cutting blade, etc., and a grain culm conveying device 6 for transporting and supplying the reaped grain culm to the threshing device 1 are provided. On the other side of the machine base, an operation panel 7, a driver's seat 8, a grain tank 9, etc. are provided in order from the front. Reference numeral 10 denotes a lever panel provided on the side of the driver's seat 8, and is a main shift lever 1 for switching the transmission gear in the transmission case 11 between forward 1st speed, 2nd speed, and reverse.
2. A continuously variable speed lever 14 of a position control device 13, which will be described later, a reaping speed lever 15 and a reaping clutch lever 16 for switching the rotational speed of the reaping device 5 and grain culm conveying device 6 between standard speed and high speed are provided. The operation panel 7 is provided with side clutch levers 17, 17, various switches, indicator lights, etc. Reference numeral 18 denotes a continuously variable transmission in which a V-belt 22 is stretched between a driving split pulley 20 attached to a counter shaft 19 and a driven split pulley 21 attached to the input shaft of the transmission case 11. The V-pulley 23, which is integrated with the fixed pulley, is driven by one V-pulley 24a of the engine 24 via a V-belt, and the movable pulley of the drive split pulley 20 is slid by the drive of a cam 25 to expand and contract the V-groove width. , cam 25 is connected to rod 26 and link 2
7 and connected to the fan-shaped cam 28 of the position control device 13. Next, the position control device 13 will be explained with reference to FIG. 5. A plate 31 is rotatably mounted on a horizontal shaft 30 rotatably supported by a case 29, and the link 27 and the fan-shaped cam 28 are fixed. The lower end of the continuously variable speed lever 14 is fixed to the upper part of the plate 31, and a pair of position switches A and B are attached to the plate surface to connect and disconnect from the circumferential surface of the fan-shaped cam 28. . Further, a screw shaft 33 supported in the front-rear direction at the bottom of the case 29 is rotated forward and backward by a motor 34, and a slider attached to the lower end of the arm integrally hanging downward from the horizontal shaft 30 is screwed. It is engaged with the shaft 33. Furthermore, a plate 35 erected on the high speed side of the case 29 has a high speed limit position set in contact with the fan-shaped cam 28 at the V6 position (high/low speed position) when the continuously variable speed range is divided into nine stages from V1 to V9. A normally open type high speed limit switch 36a is used as a device, and a normally closed type deceleration switch 3 is used as a deceleration position setting device.
6b, this deceleration position setting device is inserted into the control circuit as a limiting circuit, and a portion of the fan-shaped cam 28 facing the deceleration switch is cut out. Numeral 37 is a high speed detection switch which is turned on when the reaping speed change lever 15 is set to the high speed position as shown in FIG. 3, and constitutes a high speed detector. In addition, 38 in the drawing is a spring held by a bolt 39b protruding from the fixed plate 39a and a nut 39c at the tip thereof, which brakes the plate 31 and which is attached to the shaft of the engine 24.
The pulley 24b drives the threshing device 1, and the axles 41, 41 protrude left and right from the mission case 11.
Subrockets 42, 42 mounted on the outer side of the drive unit 2 drive the traveling device 2. 43 is battery, 4
4 is a main switch, and 45 is a charge lamp. Next, to explain the operation, the traveling device 2 is connected to the V-pulley 24a of the engine 24,
The reaping device 5 and the grain culm conveying device 6 are driven by an output pulley 41' of a reaping transmission 40 integrated with the mission case 11. If the grain culm to be harvested is in a standard state where it is erect but not extremely collapsed, set the reaping gear shift lever 15 to the rear standard position (high speed detection switch 37 is OFF). The main speed change lever 12 is set to 1st or 2nd forward speed depending on the crop of the grain culm or the state of attached water, etc., and the traveling speed is changed by tilting the continuously variable speed lever 14 back and forth. At that time, if the continuously variable speed lever 14 of the position control device 13 is set to a lower speed than the speed limit of the high speed limit switch 36a and the position switches A and B are in neutral (the speed change operation is completed and the speed is set) In other words, position switch A is ON as shown in Figure 6a.
B is turned OFF, the high speed detection switch 37 and the high speed limit switch 36a are turned OFF, and the deceleration switch 36b is turned ON. Therefore, in the control circuit shown in FIG. 7, relay R1 is closed and the motor 34 is stopped. ing. When the continuously variable speed lever 14 is set to the low speed side from this state, position switches A and B are both turned off as shown in FIG. 6c, relay A' is switched to the terminal connected to the power supply, and the motor 34 is As the fan-shaped cam 28 rotates in the opposite direction, the fan-shaped cam 28 rotates toward the low speed side and widens the groove width of the drive split pulley 20, so the speed is changed to a low speed, and the position switch A rides on the circumferential surface of the fan-shaped cam 28 and turns on. Since B enters the notch and is OFF, the motor 34 stops when the state shown in FIG. 6a is reached. Also, when the continuously variable transmission lever 14 is tilted to the high speed side and set, both position switches A and B are set.
It turns ON, and the motor 34 rotates forward and speeds up. At that time, the set position of the continuously variable transmission lever 14 is set to the high speed limit switch 36a and the deceleration switch 36b.
If the set speed is lower than V6, for example,
When the fan-shaped cam 28 does not come into contact with the high-speed limit switch 36a and the deceleration switch 36b, the motor 34 stops at the speed setting position, and the set position is the high-speed position and the high-speed limit switch 36
Even if the fan-shaped cam 28 pushes up the speed reduction switch 36b and turns the former ON and the latter OFF, the high-speed detection switch 37 remains OFF, so the notch of the fan-shaped cam 28 reaches the set position of the continuously variable transmission lever 14. The motor 34 rotates until it reaches the desired speed, and the speed is eventually changed to the set high speed. However, when the reaping speed lever 15 is set to a high speed in order to fully raise the grain culms that have fallen down considerably, the high speed detection switch 37 is turned on, so the continuously variable speed lever 14 is set to the high speed limit switch 3.
6a and deceleration switch 36b, the fan-shaped cam 28 rotates to the high-speed side and the high-speed limit switch 36a is pushed up by the circumferential surface of the fan-shaped cam 28 and turned ON, position switches A and B are set.
Even if both are ON, relay R1 switches to the lower side and the coil of relay B' is not energized, and relay B' enters the state shown in FIG.
will stop and therefore will not be able to shift to a high speed. As a result, when the reaping speed lever 15 is set to a high speed, the speed of the grain culm lifting body 4 and cutting blade of the reaping device 5, as well as the grain culm conveying device 6 is increased by that amount, and when the speed is changed by the continuously variable speed lever 14, the traveling device 2 The reaping device 4 and the like are speeded up or decelerated in conjunction with each other, but the speed is never increased above the speed set by the high speed limit switch 36a. Further, when the continuously variable transmission lever 14 is set to a high speed range (V6 or higher) and the continuously variable transmission 18 is in a high speed transmission state (V6 or higher) as shown in FIG. If you put it on high speed, the 8th
As shown in FIG. b, the high speed limit switch 36a is turned on.
Since the high speed detection switch 37 is turned on while the deceleration switch 36b is turned off, relay R is activated.
1 switches to the lower side, the motor 34 rotates in the opposite direction, and the position control device 13 decelerates.
When the deceleration detection switch 36b is in the V6 position, the fan-shaped cam 2
When it enters the notch 8 and turns ON, relay A' switches, motor 34 stops, and deceleration switch 36
It is decelerated to the speed limited by the setting position of b,
The position control device 13 and the control circuit are in the state shown in FIG. 9a. Note that the aforementioned deceleration control is performed in steps 7 to 7 of the control table below.
As shown in column 9, position switches A and B
This is done regardless of whether it is ON or OFF, and since the high speed limit switch 36a is inserted in the control circuit in series with the high speed detection switch 37, it is not necessarily necessary for the deceleration control.

[Table] Furthermore, the state shown in FIG. 10 shows the speed increase up to V6 shown in the second column of the control table above. Furthermore, relay R2 is grounded to L of regulator 46 only when the engine is stopped, so when the main switch is turned on, relay R2 is activated, and when engine 24 is stopped, both position switches A and B are turned ON. Although the motor 34 does not rotate forward (stops) even after the rotation, the motor 34 rotates reversely and decelerates when both position switches A and B are turned off, and the groove width of the drive split pulley 20 increases. (f) Effects of the Invention As described above, the present invention interlocks the reaping device 5 with the grain culm lifter 4 and the traveling device 2, which are equipped with a transmission device, with one continuously variable transmission device 18 over the entire speed change range. A high-speed detector attached to the transmission of the grain culm lifting body 4 is connected to the control circuit of the position control device 13 which is linked so as to shift the continuously variable transmission 18 to the speed setting position of the continuously variable transmission lever 14. A limiting circuit is inserted that decelerates the continuously variable transmission 18 to a set speed based on the detection of the speed, and the reaping device 5 and traveling device 2 are configured to operate the speed change operation in conjunction with each other below the set speed. If the grain is standing upright or the degree of lodging is slight and it is possible to reap and thresh with high efficiency, set the culm pulling body 4 of the reaping device 5 to a low speed, and in this state, set the traveling speed to a single speed. When the continuously variable transmission 18 changes speed in a high-speed range, the grain culm lifting body 4 shifts to the continuously variable transmission 1.
The speed is changed in conjunction with 8, thereby making it possible to raise the grain culm in an orderly manner at a speed suitable for the traveling speed. In addition, in a field where grain culms have both erect and lodging parts, when entering from the erecting grain culm area to the lodging grain culm area, the speed change device of the grain culm raising body 4 is set to high speed to detect the high-speed detector. senses this, the position control device 13 of the continuously variable transmission 18
The grain culm lifting body 4 of the reaping device 5, which is linked to the vehicle speed, will not raise the grain culm at an abnormally high speed, thereby preventing grain shedding. can. Moreover, even when the transmission of the grain culm pulling body 4 is set at high speed, if the continuously variable transmission 18 is operated to change the speed in accordance with the lodging degree of the grain culm within a range below the set speed, for example, the lodging degree will change. Although relatively large,
If the vehicle speed is increased within the range below the set speed, the lifting speed of the grain culm pulling body will increase accordingly, allowing highly efficient reaping and threshing of the lodging grain culms. When harvesting and threshing fallen grain culms, if the vehicle speed is reduced, the grain culm lifting body can be decelerated in conjunction with the vehicle speed while being at high speed by the attached transmission, which prevents the ear neck from becoming soft due to lodging. Even if the grain culm pulling body is bent or broken, it is possible to prevent the raising claws of the grain culm pulling body from squeezing the ear neck at an abnormally high speed and causing shedding or ear breakage.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention,
Figure 1 is a perspective view of the combine harvester, Figure 2 is a perspective view of the control section, Figure 3 is a perspective view of the reaping speed lever, and Figure 4 is a perspective view of the harvester.
The figure is a front view of the transmission device, FIG. 5a is a side view of the position control device, FIG. 5b is a sectional view of a part of the same, and FIGS. , FIG. 7, FIG. 8a, and FIG. 9a are control circuit diagrams, and FIGS. 8b, 9b, and 10 are side views showing the relationship between the fan-shaped cam and the switch. 2... Traveling device, 4... Grain culm pulling body, 5... Reaping device, 6... Grain culm conveying device, 13... Position control device, 14... Continuously variable speed lever, 15... Reaping variable speed lever, 18... Continuously variable transmission device , A, B...Position switch.

Claims (1)

[Claims] 1 Reaping device 5 with grain culm pulling body 4 equipped with a transmission device
and the traveling device 2 into one continuously variable transmission 18,
A control circuit of a position control device 13 that is connected to operate in an interlocking manner throughout the entire speed change range and shifts the continuously variable transmission 18 to the speed setting position of the continuously variable speed lever 14 is connected to a control circuit for changing the speed of the grain culm lifter 4. Upon detection by a high speed detector attached to the device, a limiting circuit is inserted that decelerates the continuously variable transmission 18 to a set speed, and below the set speed, the reaping device 5 and traveling device 2 interlock to operate the speed change. A transmission device for a combine harvester, characterized in that it is configured to.