JPH01254433A - Speed change gear for moving agricultural machine - Google Patents

Abstract

PURPOSE:To facilitate the position alignment of a working device on a levee side to a tractor vehicle body and the moving operation of the vehicle body at the time of mounting the working device by utilizing advancing half- connecting clutch and backing half-connecting clutch by the operation of a manual lever. CONSTITUTION:A lifting indication switch 9 for lifting up a working device with respect to a vehicle body 1 and a lowering indication switch 10 for lowering same are provided in the vicinity of a change lever 2. When the vehicle body 1 is advancing, the working device is lifted up or lowered up to a defined position through the one-touch 'IN' operation of the indication switch 9 or 10. When the vehicle body 1 is stopping, the lifting up or lowering is performed only while carrying out the 'IN' operation of the indication switch 9 or 10. At the time of backing, the working device is lifted up to a defined upper limit position and held there being interlocked with the positioning of the change lever 2 in the backing position, thus, interlockingly forming the working device.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a transmission device for a mobile agricultural machine, and a working device that smooths and interlocks clutch engagement/clutch operation and half-clutch operation in shifting gears using a manual lever of a mobile agricultural machine. The purpose is to make lifting and lowering operations easier and safer, and can be used on tractors, riding seedling transplanters, combine harvesters, etc.

2. Description of the Related Art Conventionally, there have been some tractors that move forward, reverse, and stop by engaging a traveling clutch by operating a manual lever of the tractor to move forward or backward. In addition, there have been devices that raise a working device such as a rotary tiller when the lever is operated in reverse.

Problems to be Solved by the Invention Conventionally, for example, when moving forward, stopping, and reversing by operating the clutch on and off using a manual lever on a tractor, the clutch was not smooth, resulting in "on/off" like when using the clutch pedal. I could not get the feeling of "cut".

Furthermore, it was difficult to use the half-clutch smoothly, and it was not possible to carry out driving operations using the half-clutch sufficiently.

Means for Solving the Problems Regarding Claim 1 This invention provides a transmission device that changes the speed of a vehicle body (1) by switching a speed change lever (2) to a forward position (a), a stop position (b), and a reverse position (c). , sensor switches (3), (4), and (5) that detect that the gear shift lever (2) is in each of the forward, stop, and reverse predetermined positions (a), (b), and (c),
A dead zone (d) at the lever position is provided between these switches (3), (4), and (5), and the forward switch (
3) or the reverse switch (5) is turned on or off, the travel clutch (6) is turned on or off, and the lever (2) is moved from the stop position (b) to the forward position (a) or A mobile agricultural machine characterized by being provided with a control device (7) that controls the transmission speed of the traveling clutch (6) in proportion to the speed of operating the lever for switching to the reverse position (c). The transmission has the following configuration.

action of invention The effect of the above configuration will be explained.

The control device (7) inputs ON and OFF of the switch (3) in the forward position (A) of the lever (2), the switch (4) in the stop position (aC port), and the switch (5) in the reverse position (C). Also, within the operation range of the lever (2), the switch (4) in the center stop position (B) is OFF, and the switch (3) in the forward position (A) or the reverse position (C) is OFF. When the switch (5) changes from the ON state to the OFF state, it can be detected that the lever (2) is located in the dead zone (d) adjacent to the switch (3) or (5).

In addition, after the lever (2) leaves the stop position N (B) and the switch (4) is turned off, it will move to the forward position (A) or the reverse position (C).
Depending on the time it takes for each switch (3) or (5) to turn on, for example, the time it takes from when the clutch plates of the friction clutch (6) come into contact until there is no slippage and the clutch is completely "engaged". It is set automatically. this is,
In other words, the clutch is in a half-clutch state for the set predetermined time. However, the time in which the clutch is in the half-clutch state is a bad condition for the clutch, so it is better to set an appropriate maximum time limit.

Effects of the Invention With the above-described configuration 1 operation, the clutch (6) can be smoothly turned on with the same feel as the clutch ``on'' operation by the conventional pedal operation with the foot, by adjusting the lever operation with the hand.

Means for Solving the Problems Regarding Claim 2 This invention provides a driving clutch (2) by switching the gear shift lever (2) to the forward position (a) or the reverse position (c).
6) In a transmission device that moves the vehicle body (1) forward or backward by setting the switch to "R", the shift lever (2) is moved from the forward position (A) or the reverse position (C) to each of these positions (A),
(c) When moving toward the stop position (b) located between the two, a half-clutch control structure is configured to delay the "r-disengagement" operation of the traveling clutch (6) and maintain the half-clutch state for a predetermined period of time. The structure of a transmission device for a portable vJ agricultural machine is characterized by:

Effect of the invention When the forward switch (3) or reverse switch (5) is turned OFF
When operating the lever (2) to disengage the clutch (6) in the F position, the disengagement of the clutch (6) is delayed, that is, the disengagement is made into a half-clutch state, and the lever (2) is moved to the stop position (B). When the switch (4) is turned on, the delay in operation is canceled and the clutch (6) is rapidly disengaged.

Effects of the Invention Therefore, the forward half-clutch and reverse half-clutch can be used by operating the manual lever (2), and the intermittent half-clutch can be used between the half-clutch state and the forward or reverse clutch (6) r engaged. It can also be operated, so for example, the tractor body (1)
It is convenient because the positioning of the working device at the edge of the ridge and the movement of the vehicle body (1) when the working device is attached can be done with just one hand.

Means for Solving the Problems Regarding Claim 3 This invention provides a transmission device that changes the speed of a vehicle body (1) by switching a speed change lever (2) to a forward position (a), a stop position (b), and a reverse position (c). , attach the working device (8) to the vehicle body (1).
The E-ascend designation switch (9) to raise the gear and the descent designation switch (10) to lower it to the shift lever (2).
) is installed near the vehicle body (1), and when the vehicle body (1) is moving forward, the working device (8) is raised or lowered to a predetermined position by a single touch of the designated switch (9) or (10), and when the vehicle body (1) is stopped, the operating device (8) is raised or lowered to a specified position. is raised or lowered only while the designated switch (9) or (10) is "on", and when traveling in reverse, the shift lever (2) is moved in the reverse position (c). The transmission of the mobile agricultural machine is configured such that the working device (8) is raised to and maintained at a predetermined upper limit position.

When a control configuration is adopted in which the working device (8) is operated to raise and lower the vehicle body (1) in combination with forward, stop, and reverse gear changeover using the operating lever (2) of the invention, it can be used as an input information device such as a travel control device. An ascending designation switch (9) and a descending designation switch (10) are added.

For example, when the tractor work equipment Jl (8) is a ground work equipment (8) that is connected to the rear of the tractor body (1) by a vertical link and is moved up and down hills by a lift arm that is moved up and down by a hydraulic cylinder, The output device is a solenoid valve that expands and contracts a hydraulic cylinder that moves the lift arm up and down depending on the control configuration.

While moving forward with the lever (2) in the forward position M (A), when raising the working device (8), for example, the tilling device (8) at the end of the tilling progress, press the raise designation switch (9) in one shot. When turned ON, the working device (8) will quickly rise to the set target lifting position, and when the lever (2) is turned in the forward position WI (A) and the descending designation switch (10) is pressed, the working device (8) will rise rapidly. You can descend and start tilling. After descending, the tillage control can take over.

In addition, when the lever (2) is positioned in the reverse position M (c) and the switch (5) is ONL, the solenoid pulp is automatically activated due to the control configuration even without manual ON operation of the ascent designation switch (9). The working device (8) is controlled to be raised to the upper limit position by the hydraulic cylinder and then started to move backward, and the working device (8) is maintained at the upper limit position while moving backward. Lowering the working device (8) while moving backward is dangerous, and it may be configured so that the lowering operation does not occur even if the lowering switch (10) is pressed.

Further, when the lever (2) is in the stop position (B) and the switch (4) is ON, the ascent designation switch (9),
Both the lowering designation switch (10) and the switch (9) or (
10) is raised or lowered only while ON.

Effects of the Invention Therefore, when descending to match the edge of a concrete ridge at the start point of plowing, etc. 2 When lowering carefully while watching the working device (8) and repeatedly turning the descending designation switch (10) ON and OFF, etc. can be conveniently used.

Embodiment In the case of rotation, the vehicle body (1) is an example of a tractor (1), and as shown in FIGS.・It has a pair of rear wheels (12), and a prime mover (3
5) is installed inside and has a control handle (14) at its rear end, and a lever (2) is located on the right side of the driver's seat (15) surrounded by the fender of the rear wheel (12) in the form of a reverse lever that can be operated in the longitudinal direction. It is set up and placed in. Further, the control floor (16) has a clutch pedal (17) and an accelerator pedal (18), and the handle (14) has a throttle lever (18). The lever (2) may be provided on the handle (14). Cockpit (1)
5) On the left and right sides, there are cases (20) and (21), respectively, in which various setting buttons and switches are arranged.

Further, the working device (8) attached to the rear of the tractor (1) is exemplified by a rotary tilling device (8), and the rotary tilling device (8) is composed of an upper link (22) and a pair of left and right lower links (23). A solenoid valve (27) is connected to the lift arm (25) provided on the upper part of the transmission case (24) of the rear wheel (12), and the lifting rod (2B) is connected to the lift arm (25), which controls the expansion and contraction of the hydraulic cylinder. The lift arm (
This is a general elevating configuration in which one working device (8) is raised and lowered by controlling the vertical movement of the working device (8). The lift arm (25) is equipped with a lift arm sensor (57) that detects its rotation angle.
is the provision.

As shown in Fig. 3, the lever (2) has a handle with a work 'A' position (8) upper designation switch (9) and a lower designation switch (
10) is provided in the form of a button switch.

The base rotates back and forth around the rotation axis (28), with the front side at the forward position (A) and the center at the stop position (B).

Switches (3), (4), and (5) are arranged so that the rear side is in the forward position (C), and the switches (3), (4), and (5) are turned on in their respective positions. Sensitive zone (E)
and the dead zone (d) are arranged alternately. In addition, as shown in Fig. 4, the lift designation switch (
9) and the lowering designation switch (10) are the handle (14).
) is also attached to the area. Further, the lever (2) may be provided on the handle (14).

Further, (29) provided on the case (20) in FIGS. 2 and 3 is a position lever for vertically rotating the lift arm (25), (30) is a plowing depth setting device, and (31)
is the upper limit setting device for the lifting of the working device (8). (32) in the case (21) is a travel speed shift setting device;
(33) is the speed adjustment polyurethane in the main clutch, (34)
is the PTO source switch.

The clutch (6) is the main clutch (6) closest to the prime mover (35) in the transmission mechanism shown in FIG.
) is a forward/reverse clutch.

The transmission mechanism is configured to transmit power from the power take-off shaft (37) on the prime mover (35) side to the transmission shaft (38) via the main clutch (6), and another transmission shaft parallel to this transmission shaft (38). Transmission is configured between the transmission shaft (39) at an appropriate gear ratio, and PTO is configured at an appropriate gear ratio via the counter gear (40).
Transmission is configured to the FT and O shafts (42) with power clutches (41). Transmission is configured from the transmission shaft (39) to a transmission shaft (43) parallel to the transmission shaft (43) at an appropriate speed ratio. Further, the transmission shaft (3 days) and the transmission shaft (43) are configured to turn on and off the transmission shaft (43) in forward and reverse directions by discarding the forward/reverse clutch (3B). Furthermore, the present invention also relates to a main transmission (46) having one or more configurations that selectively transmits transmission from a transmission shaft (43) to another transmission shaft (45) parallel to the transmission shaft at an appropriate gear ratio.

a transmission shaft (with a bevel gear (48) that transmits power to the differential mechanism that transmits power to the rear wheels (12) of the sub-transmission device t (47);
49) directly via the transmission hydraulic clutch (50), or from the transmission shaft (45) to the transmission shaft (51) or (52).
The transmission is selectively configured at an appropriate gear ratio via the transmission gear.

The transmission shaft (45) is equipped with a variable speed hydraulic clutch (44) (5
3), and the transmission shaft (52) is also provided with a variable speed hydraulic clutch (54).

In the control block diagram of FIG. 7, (55) is a control solenoid valve, and (5B) is a clutch plate shift position detection sensor.

Explain the effect of rotation. What should be set before the gear change control operation of the tractor (1) is that when the lever (2) is switched from the stop position (B) to the forward position (A) or the reverse position a (C), the main clutch (6 ) is set in advance with the main clutch engagement speed adjustment polyurethane (33), and the vehicle speed is set in advance with the shift setting device (32). (4B) 3.4, auxiliary transmission (4?) Hl, specify auxiliary transmission (47) M, LL, and set the shift hydraulic clutch (44) in Fig. 6.
) (53), (50), and (54) are set at the specified positions. In this way, lever (2) is used to move forward switch (3).
), the forward/reverse clutch (36) is set to the forward side and the main clutch (6) is automatically engaged.

At this time, the passing time of the lever (2) through the dead zone (d) is (c
・Determine the speed and set the lever (2) to the forward switch (3).
If you operate the switch from ON to reverse switch (5) ON all at once, the main clutch (6) will be disengaged and the forward/reverse clutch (
After confirming that the tractor (1) is decelerated by disengaging the lever (3B), the forward/reverse clutch (36) is put into reverse, and the automatic operation stage of engaging the main clutch (6) is taken. ) during the movement of the stop switch (4) O
The engagement time of the main clutch (6) is controlled in accordance with the operation time from FF to turning on the reverse switch (5).

In addition, in the case of a half-clutch, the configuration is the same, and the main clutch (
6) The maximum time period of the transmission engagement speed can also be applied to the maximum time period of the transmission disengagement speed of the main clutch (6), thereby enabling half-clutch operation.

In addition, in the case of a configuration in which the operation of the gear change lever (2) is linked to the raising and lowering of the work equipment 21 (8), the raising designation switch (9) provided on the lever (2) is ONL, and the forward switch (3
) When it is ON, it will rise to the target position in one stroke. The rise limit is set by the upper limit setting device (31). Also, when the downward designation switch (10) is turned on, the forward switch (3) is turned on.
When it is ON, it can descend to the target position all at once. When the stop switch (4) is ON and stopped, each designated switch (
It will rise and fall only while pressing 9) or (10), so turn each designated switch (9) or (10) ON or 0FF.
t-can be raised or lowered intermittently by repeating. When the reverse switch (5) is turned on, the working device (8) automatically rises, so it is safe. This rise and fall is
When moving forward, priority is given to ascending. For example, if the descending designation switch (10) is turned on and the ascending designation switch (9) is also turned on while descending, the ascending designation switch (9) is turned on as in the case of stopping. , it only rises while it lasts. Further, the limits for raising and lowering one working device (8) are within the range specified by the general position lever (29), plowing depth setting device (30), and upper limit setting 'Is (31).

The computer (CPU) of the control device M (7) shown in the control block diagram of FIG. 3) In addition to (4) and (5) and the up/down designation switches (9) and (10) as input devices, the shift setting device (32) for specifying speed change and other control sensors are also input. This is to be output to the main section. By inputting the ascent designation switch (9), the landing designation switch (10), and the reverse movement switch (5), the control device (7) activates the hydraulic cylinder that raises and lowers the lift arm (25) for raising and lowering the working device (8). Solenoid valve to operate (2
? ), and the target position is detected and stopped while reading the detection value of the lift arm sensor (57). In addition, the ON/OFF information of switches (3), (4), and (5) for each lever position of forward (a), stop (b), and reverse (c),
It outputs to each control solenoid pulp (55) (55) that turns on and off the main clutch (6) or forward/reverse clutch (3B), and the shift position detection sensor (56) (5E+) reads the movement position of the clutch plate. Nagara Lord Kra Nchi (
6) is used to control the important time.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side view, FIG. 2 is a partially omitted plan view, FIG. 3 is a partially enlarged perspective view, and FIG. 4 5 is a partially enlarged front view, FIG. 5 is an operational view, FIG. 6 is a transmission mechanism diagram, and FIG. 7 is a control block diagram. In the figure, (1) is the vehicle body, (2) is the lever, (3) (4
) (5) is a switch, (6) is a clutch, (7) is a control device, (8) is a working device, (9) is a lift designation switch,
(10) is the lowering designation switch, (25) is the lift arm, (27) is the solenoid valve, (32) is the shift setting device, (33) is the main clutch speed adjustment polyurethane,
(3B) is a forward/reverse clutch, (55) is a control solenoid valve, (56) is a shift position detection sensor, (57
) indicates the lift arm sensor.

Claims (1)

[Scope of Claims] 1. In a transmission device that changes the speed of a vehicle body (1) by switching a speed change lever (2) to a forward position (a), a stop position (b), and a reverse position (c), the speed change lever (2) moves forward, stops,
Each sensor switch (3), (4), and (5) that detects that the reverse movement is in each predetermined position (a), (b), and (c) is connected to each of these switches (3), (4), and (5). A dead zone (d) of the lever position is disposed between them, and the traveling clutch (6) is turned on and off by turning on and off the forward switch (3) or the reverse switch (5), and The transmission "on" speed of the travel clutch (6) is adjusted in proportion to the speed at which the lever is operated by moving the lever (2) from the stop position (B) to the forward position (A) or the reverse position (C). A transmission device for a mobile agricultural machine, characterized in that it is provided with a control device (7) for controlling speed and speed. In a transmission device that moves the vehicle body (1) forward or backward by switching the speed change lever (2) to a forward position (A) or a reverse position (C), the traveling clutch (6) is "engaged" and the vehicle body (1) is moved forward or backward. ) from the forward position (a) or the reverse position (c) toward the stop position (b) located between these positions (a) and (c), when moving the travel clutch (6) "Kiri"
A transmission device for a mobile agricultural machine characterized by having a half-clutch control structure capable of delaying operation and maintaining a half-clutch state for a predetermined period of time. Move the gear shift lever (2) to forward position (a), stop position (b),
In a transmission device that shifts the vehicle body (1) to the reverse position (c), there is a raise designation switch (9) that raises the working device (8) relative to the vehicle body (1), and a descent designation switch (10) that lowers the work device (8) relative to the vehicle body (1). is provided near the gear shift lever (2), and when the vehicle body (1) moves forward, the working device (8) is turned on by one-touch "on" operation of the designated switch (9) or (10).
When stopping, the shift lever (2) is raised or lowered only while the designated switch (9) or (10) is turned on. A transmission device for a mobile agricultural machine, which is configured to be interlocked to raise the working device (8) to a predetermined upper limit position and maintain it by moving the working device (8) to a predetermined upper limit position.