JPH0120823Y2 - - 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 erected grain culms or in fields with good conditions, it is sufficient to set the raising speed of the reaping device and the grain culm conveyance speed as standard and link the raising speed to the traveling speed. If conditions are bad, the pulling speed must be increased, and if the continuously variable transmission that transmits to the reaping device and traveling device is set to the same high speed as under good conditions, the pulling speed will become too high and cause sloughing. or generate abnormally loud noises. Therefore, in order to solve the above-mentioned drawbacks through automatic control, a deceleration position setting device was installed in the middle of the control range of the position control device attached to the continuously variable transmission, and a high-speed detector was attached to the transmission of the reaping device. A reaping clutch detector is inserted to detect when the clutch is engaged, and when reaping the standing grain culm, the reaping device is set at the standard speed and the traveling speed and lifting speed of the reaping device are set over the entire speed range of the continuously variable transmission. When the grain culms move from an upright area to a collapsed area in one field, the gear shift lever of the reaping device is moved while the gear position of the position control device is set higher than the speed set by the deceleration position setting device. When the machine was set to high speed, the speed was automatically reduced to the speed set by the deceleration position setting device, and the above-mentioned grain shedding phenomenon was eliminated by operating only the speed change lever of the reaping device. However, when the machine is rotated or moved while the speed is limited by the high-speed switch, the work efficiency is significantly reduced. The purpose of the present invention is to improve the above-mentioned drawbacks, and the purpose of the present invention is to interlock the grain culm lifter-equipped reaping device and the traveling device, which are equipped with a transmission, over the entire speed range via a continuously variable transmission. In the combine harvester, a control circuit of a position control device for shifting the continuously variable transmission to the speed setting position of the speed change lever is attached to the speed change device of the grain culm lifter when the speed change lever is in the high speed position. When the high speed detector and the reaping clutch detector that detects the engagement of the reaping clutch are in the detection state, the continuously variable transmission decelerates to the set speed, and as one of the above detectors does not detect, the shift lever changes to the above setting. This is characterized by the insertion of a limiting circuit that automatically increases the speed to the position and returns to the position. The embodiment shown in the drawings will be explained below.1
is a threshing device mounted on one side of the machine base with a traveling device 2, and in front of it 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, 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 and high speed, etc. are provided, and the operation is easy. Side clutch lever 1 is on board 7.
7, 17 and various switches, indicator lights, etc. are provided. 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 to connect and disconnect from the circumferential surface of the fan-shaped cam 28. . Further, a screw shaft 33 supported in the front-back 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 includes a normally open high-speed limit switch 36a as a high-speed limit position setting device that contacts 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; Normally closed type deceleration switch 36 as deceleration position setting device
b is attached. Furthermore, as shown in FIG.
A high-speed detector consisting of a high-speed detection switch 37 which is turned on when 5 is set at high speed is provided, and a reaping clutch detector consisting of a reaping clutch switch 16a is attached to the engaged position of the reaping clutch lever 16, and the high-speed detection switch 37 A reaping clutch switch 16a is inserted as a limiting circuit on the input side of relay _R1 of the control circuit. {However, Fig. 7,
In Figures 8a and 9a, the reaping clutch switch 1
6a is omitted} Note that 38 in the drawing is a spring held by a bolt 39b protruding from a fixed plate 39a and a nut 39c at its tip, which brakes the plate 31 and is attached to the shaft of the engine 24. The V-pulley 24b driven by the thresher 1 drives the axle 41,
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 has the V-pulley 24a of the engine 24 and
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, the reaping gear shift lever 15 is set to the rear standard position, and the main gear shift lever 12 is normally set at the first forward speed. In special cases, which will be described later, the speed is set to 2nd speed, and shifting during running is performed by tilting the continuously variable transmission lever 14 back and forth. At this time, if the continuously variable speed lever 14 of the position control device 13 is in the neutral position at a medium or low speed position (the speed change operation is completed and the set speed is reached), the position switch A is 6
As shown in Figure a, ON and B are OFF, and the high speed detection switch 37 and high speed limit switch 36a
is off, so in the control circuit shown in Figure 7, relay R1 is closed and motor 34 is turned off.
has stopped. From this state, when the continuously variable speed lever 14 is set to the low speed side, position switches A and B are both turned OFF as shown in Figure 6c, relay A' is switched to the terminal connected to the power supply, and the motor 34 is reversed. As the fan-shaped cam 28 rotates, 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 is turned on. , B enter the notch and are OFF, so the motor 34 stops when the state shown in FIG. 6a is reached. Further, when the continuously variable transmission lever 14 is tilted and set to the high speed side, both position switches A and B are turned on, and the motor 34 rotates forward to increase speed. At this time, if the set position of the continuously variable transmission lever 14 is lower than the set speed of the high speed limit switch 36a and the deceleration switch 36b, the motor 34 will stop at the speed set position, and the set position will be lower than the set speed of the deceleration switch 36b. Even if the high speed limit switch 36a is turned on at high speed, the high speed detection switch 37 (the reaping clutch switch 16a is turned on during reaping operation) is turned off. The motor 34 rotates until the notch 28 is reached, and the speed is eventually changed to the set 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. As a result, the motor 34 stops and the speed is not changed 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 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 not 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, the relay R1 is switched to the lower side, the motor 34 rotates in the opposite direction, the position control device 13 is decelerated, and the deceleration switch 36b is in the 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
This is done regardless of whether it is ON or OFF, and it stops in the state shown in column 5.

[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 and is turned on, the deceleration switch 36b enters the notch and is turned on, and both position switches A and B ride on the circumferential surface.
It is 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. Note that relay R2 is grounded to L of regulator 46 only when engine 24 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), 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. Also, the high speed detection switch 37 is replaced with a second speed detection switch 12a, and the high speed limit switch 3 is used regardless of the presence or absence of these switches 12a and 37.
6a may be omitted. When the grain culm is in a standard erect state and the transmission of the grain culm lifting body is set to the standard speed, and when the gear ratio of the continuously variable transmission is less than the set speed, the traveling speed of the aircraft and the raising of the grain culm lifting body Although it is possible to change the speed while matching the speed, and thereby raise the grain culm in an optimal state and reap with high efficiency, the erected state of the grain culm has fallen down from the standard part. When the reaping speed change lever 14 is set to a high speed range and the reaping speed lever 15 is set to a high speed in order to cause the lodging grain culm, the continuously variable transmission 18 automatically decelerates to the set speed. This makes it possible to prevent grain shedding and culm breakage when the grain culm is lifted. In addition, when one stroke of reaping is completed and the reaping clutch is disengaged to rotate the machine, or when the reaping speed lever 15 is switched to the standard speed in order to transition from the lodging grain culm reaping state to the upright grain culm reaping state, the continuously variable speed Since the device automatically increases the speed up to the speed set by the continuously variable speed lever 14 set at the high speed position, the machine can rotate or harvest with high efficiency with simple operation.

[Brief explanation of the drawing]

The drawings show one embodiment of the present 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, b is a sectional view of a part of the same, FIGS. Figure 7, Figure 8a, Figure 9a and Figure 10 are control circuit diagrams, Figure 8b and Figure 9b.
FIG. 2 is a side view showing the relationship between the fan-shaped cam and the switch. 2... Traveling device, 4... Grain culm pulling body, 5... Reaping device, 12... Main gear shift 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 a reaping device with a grain culm lifting body and a traveling device equipped with a transmission are interlocked over the entire speed range via a continuously variable transmission, the continuously variable transmission is moved to a speed setting position of a speed change lever. In the control circuit of the position control device that operates the speed change, when the speed change lever is in the high speed position, the high speed detector attached to the speed change device of the grain culm lifter and the reaping clutch detector that detects the engagement of the reaping clutch are in the detection state. If there is, a limiting circuit has been inserted that causes the continuously variable transmission to decelerate to the set speed and automatically increase the speed to return to the set position of the gear shift lever when one of the detectors is not detected. Characteristic transmission device for combine harvesters.