JPH044505Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a position control type transmission device for a combine harvester. Generally, when harvesting in a field where there is little dew or rainwater adhering to the erecting grain culms, it is sufficient to set the raising speed of the reaping device and the grain culm conveying speed as the standard, and to link the raising speed to the traveling speed. If the husks are standing up in an orderly manner, are free of dew or rainwater, and can be threshed well even when harvesting at high speeds, set the main gear to 2nd forward gear, which is suitable for normal road driving. If the continuously variable transmission is set to a high speed, the grain culm lifting speed becomes too high and grain shedding occurs. In order to overcome these drawbacks, in addition to operating the side clutch lever and other levers, the reaping clutch lever and continuously variable speed lever must be operated each time the machine is turning, which is extremely troublesome. The present invention aims to improve the above-mentioned drawbacks, and provides a combine harvester in which the reaping device and the traveling device are driven via a continuously variable transmission and a main transmission. The control circuit of the position control device that causes the continuously variable transmission lever to shift to the set speed position is configured to operate the continuously variable transmission at the set speed based on the detection state of the detector that detects the high speed position of the main shift lever and the engagement of the reaping clutch. The present invention is characterized in that a limiting circuit is inserted which causes the speed change lever to decelerate up to a maximum speed and automatically returns the gear shift lever to the set position when any of the detectors detects no detection. Hereinafter, one embodiment of the present invention will be explained with reference to the drawings. Reference numeral 1 denotes a threshing device mounted on one side of a machine base having a traveling device 2, and in front of it is a threshing device with weeding bodies 3, 3 and a chain with a lug. A reaping device 5 consisting of grain culm pulling bodies 4, 4 and cutting blades, etc., and a grain conveying device 6 for conveying and supplying the reaped grain culm to the threshing device 1 are provided. 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 includes a main shift lever 12 that switches the shift gear that constitutes a part of the main shift device inside the transmission case 11 to forward 1st speed, 2nd speed, and reverse. a continuously variable speed lever 14 of a position control device 13, which will be described later;
A reaping speed change lever 15 and a reaping clutch lever 16 for switching the rotational speed of the reaping device 5 and the grain culm conveying device 6 between standard and high speed are provided, and the operation panel 7 includes side clutch levers 17, 17, various switches, and displays. There are 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 slides by rotation of the cam 25 to expand and contract the V-groove width. and the cam 25 is connected to the rod 26 and the link 2.
7 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, which touch and separate 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 3 is installed on the high speed side of the case 29.
5 is equipped with a normally open high speed limit switch 36a and a normally closed deceleration switch 36b which contact the fan-shaped cam 28 at the V6 position when the continuously variable speed range is divided into V1 to V9 stages. 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 16a is a reaping clutch switch provided at the engaged position of the reaping clutch lever 16. 40 is a reaping transmission integrated with the mission case 11, and its input shaft is connected to the mission case 1.
An output pulley 41' is attached to the output shaft in conjunction with the main transmission incorporated in the main transmission. 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 V-pulley 24b attached to the shaft of the engine 24. drive the threshing device 1, and the axle 41 protrudes left and right from the milling case 11;
Sprockets 42, 42 attached to the outside of 41
drives the traveling device. 43 is battery,
44 is a main switch, and 45 is a charge lamp. Next, to explain the operation, the traveling device 2 is driven by the V-pulley 24a of the engine 24 via the continuously variable transmission 18 and the main transmission in the transmission case 11, and the reaping device 5 and grain culm conveying device 6 are driven by the V-pulley 24a of the engine 24. It is driven by the engine 24 via the continuously variable transmission 18, the main transmission in the transmission case 11, and the output pulley 41' of the reaping transmission 40. In addition, when the grain culm to be harvested is in a standard state where it is upright and not extremely laid down, the reaping disguise lever 15 is set to the rear standard position, and the main gear shift lever 12 is normally set to 1st forward speed. When the grain culms are standing up neatly and there is no dew or rainwater attached, and the reaping conditions are good, the forward speed is set to 2nd speed, and the speed is changed while driving by tilting the continuously variable speed lever 14 back and forth. When the reaping conditions are standard and the continuously variable speed lever 14 of the position control device 13 is in a neutral position at a medium speed or low speed position (a state where the speed change operation is completed and the set speed is reached), Position switch A is ON and B as shown in Figure 6a.
is OFF, and the high speed detection switch 37 and high speed limit switch 36a are OFF (low speed switch 36b is ON), so in the control circuit shown in FIG. 7, relay R1 is closed and motor 34 is stopped. are doing. When the continuously variable transmission lever 14 is set to the low speed side from this state, both position switches A and B are 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 that the speed is changed to a low speed, and the position switch A rides on the cam surface of the fan-shaped cam 28, and the position switch B When the motor 34 enters the notch and remains OFF, the state shown in FIG. 6a is reached and the motor 34 stops. Further, when the continuously variable transmission lever 14 is tilted to the high speed side and set, both position switches A and B are turned on, and the motor 34 rotates forward to increase speed. 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 36.
If the speed is lower than the set speed b, the motor 34 will stop at the set speed position, and even if the set position is higher than the set speed of the deceleration switch 36b and the high speed limit switch 36a is turned on, the high speed detection switch will not be activated. 37 (the reaping clutch switch 16a is ON during reaping operation) is OFF, so the motor 34 rotates until the notch of the fan-shaped cam 28 reaches the position where the continuously variable transmission lever 14 is set, and eventually the reaping clutch switch 16a is turned on as set. The speed is changed to high speed. However, when the reaping gear shift lever 15 is set to a high speed in order to fully raise the grain culms that have fallen down significantly, the high speed detection switch 37 and the reaping clutch switch 16a are turned on, so the continuously variable shift lever 14 is set to the high speed limit switch 36a. When the speed is set to a higher speed side, the fan-shaped cam 28 rotates toward the higher speed side and the high-speed limit switch 36a is set to the higher speed side.
When it is turned ON by pushing up on the circumferential surface of the switch, relay R1 is switched and the coil of relay B' is not energized and relay B' is in the state shown in Figure 7 even if position switches A and B are both ON. The motor 34 stops and is not shifted to a higher 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 using the continuously variable speed lever 14, the speed of the traveling device 2 is increased. The speed is increased or decelerated in conjunction with the reaping device 4, etc., 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. When the high speed is set, the high speed limit switch 36a is turned on and the deceleration switch 36b is turned on.
is turned OFF, high-speed detection switch 3
7 is turned ON as shown in Figure 8a, relay R1 switches to the lower side, motor 34 rotates in reverse, position control device 13 decelerates, and deceleration switch 36b moves to V6 position. Figure 9b
As shown in the figure, when the fan-shaped cam 28 enters the notch and turns ON, the relay A' switches, the motor 34 stops, and the speed is reduced to the speed limited by the setting position of the deceleration switch 36b, and the position control device 13 and the control The circuit is 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 are
This is done regardless of whether it is ON or OFF, and it stops in the state shown in column 5.

【table】

[Table] As mentioned above, when position switches A and B are set in the high speed range to reap upright grain culms, when the machine is in the lodging grain culm area, reaping gear shift lever 1 is set.
5 is set at high speed and the continuously variable transmission 18 is automatically decelerated to perform reaping work, the position control device 13 is in the state shown in FIG. 9b, and the 18th column of the control table is As shown, the high speed limit switch 36a rides on the circumferential surface of the fan-shaped cam 28.
ON, deceleration switch 36b enters the notch and turns ON,
Both position switches A and B rest on the periphery and are turned ON. In this state, when the reaping clutch lever 16 is turned off to rotate the machine, the reaping clutch switch 16a is turned OFF as shown in Fig. 10, relay R1 is switched upward, and relays A' and B' are also energized. Since the switch is made downward, the motor 34 rotates in the normal direction as shown in column 19 of the control table, and the fan-shaped cam 28
When the motor 34 rotates toward the high speed side and the position switch B enters the notch, it turns OFF as shown in column 20 of the control table, and the motor 34 stops. That is, the continuously variable transmission 18 is switched to the deceleration switch 36b.
When harvesting a lodging grain culm with the speed reduced to the speed set in , when the reaping switch lever 16 is turned off to interrupt the reaping and rotate the machine, the position control device 13 changes to a continuously variable speed. The speed is automatically increased to the high speed position where the lever 14 is set. Therefore, if the erect grain culms are standing up in an orderly manner and are free from dew or rainwater, and if good threshing can be performed even with high-speed reaping depending on the variety or crop, the main shift Reaping and threshing is performed by putting the lever 12 into the second forward speed, which is applied to normal road driving. At this time, if the continuously variable speed lever 14 is set to high speed, the reaping speed lever 15 is set to the standard position, and even if the high speed detection switch 37 is turned off, the grain culm lifting speed becomes too high and grain shedding occurs. In order to solve this problem, the following measures were taken. A 2nd speed detection switch 12a is provided at the 2nd speed position of the main shift lever 12, and as shown in _FIG .
inserted in parallel. However, the high speed detection switch 37 may be replaced by a second speed detection switch 12a. Then, when the main shift lever 12 is put into the second forward speed with the continuously variable shift lever 14 set in the high speed range, the second speed detection switch 12a is turned on even though the high speed detection switch 37 is OFF and the high speed limit switch 36a is not present. , relay R ₁ switches downward as shown, and relay A' connects to the terminal connected to the power supply.
Since relay B' is connected to the terminal connected to ground, the motor 34 rotates in the opposite direction, thereby rotating the fan-shaped cam 28 in the deceleration direction, and the low-speed switch 36b enters the notch from the circumference of the fan-shaped cam 28 and turns ON. When this happens, the relay A' switches downward and the motor 34 stops, so that the grain culm lifting body 4 does not raise the grain culm at an abnormally high speed. In addition, when the standing grain culm reaches the standard state during reaping work, when the main gear shift lever 12 is changed to forward 1st speed, the 2nd speed detection switch 12a is turned OFF, so the relay R ₁ is switched upward, and the relay Since B' is switched to the terminal connected to the power source, the motor 34 rotates forward and the speed is automatically increased to the high speed position set by the continuously variable speed lever 14. Note that relay R ₂ is grounded to L of regulator 46 only when engine 24 is stopped, so relay R ₂ is activated when the main switch is turned on, and position switches A and B are both ON when engine 24 is stopped. Although the motor 34 does not rotate forward (stops), the position switches A and B
When both are turned OFF, the motor 34 rotates in the opposite direction and performs deceleration operation, and the groove width of the drive split pulley 20 increases. The present invention provides a combine harvester in which the reaping device 5 and the traveling device 2 are driven via a continuously variable transmission and a main transmission as described above, in which the continuously variable transmission is shifted to the speed setting position of the continuously variable transmission lever 14. The control circuit of the position control device 13 to be activated is configured to decelerate the continuously variable transmission to a set speed according to the detection state of the detector that detects the high speed position of the main shift lever 12 and the engagement of the reaping clutch, respectively, and to operate the continuously variable transmission to a set speed. We have inserted a limiting circuit that automatically returns the speed change lever to the set position when the detector does not detect it, so that when the grain culm reaping conditions are good, the continuously variable speed lever 14 is set in the high speed range. When the main gear shift lever 12 is put into the second forward speed in the state where the main gear shift lever 12 is put into the second forward speed, the detector that detects the second speed goes into the detection state and the position control device 13 decelerates, causing the raising of the grain culm lifting body of the reaping device. The speed does not become abnormally high, and the shedding phenomenon caused by the pulling action of the grain culm triggering body can be prevented. Also, in the above state, move the main shift lever 12 forward to 1
When the gear is switched to 2nd gear, the detector that detects 2nd gear is not detected, and the position control device 13 is activated to automatically increase the speed to the set speed of the continuously variable transmission lever 14, so that the gear shift operation is not performed. At least the desired speed can be set.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
Fig. 1 is a perspective view of the combine harvester, Fig. 2 is a perspective view of the control section, Fig. 3 is a front view of the transmission device, Fig. 4 a is a side view of the position control device, and b is a sectional view of a part of the same. , Figures 5a, b, and c are perspective views showing the operation of the position switch, Figures 6 and 7a,
8a and 9 are control circuit diagrams, and FIGS. 7b and 8b 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, 12... Main speed change lever, 12a... 2nd speed detection switch, 13... Position control device, 14... Continuously variable speed lever , 15... Reaping speed lever, 18... Continuously variable transmission, A, B... Position switch.

Claims (1)

[Scope of utility model registration request] In a combine harvester in which the reaping device 5 and the traveling device 2 are driven via a continuously variable transmission and a main transmission, a position control device 13 for shifting the continuously variable transmission to a speed setting position of a continuously variable transmission lever 14 is provided. The control circuit is configured to decelerate the continuously variable transmission to a set speed depending on the detection state of a detector that detects the high speed position of the main shift lever 12 and the engagement of the reaping clutch, respectively, and to decelerate the continuously variable transmission device to a set speed, and to decelerate the continuously variable transmission device to a set speed depending on the detection state of the detector that detects the high speed position of the main shift lever 12 and the engagement of the reaping clutch. A speed change device for a combine harvester, characterized in that a limiting circuit is inserted therein to automatically return a speed change lever to a set position.