JPS5821134B2 - Traveling speed control device for mobile agricultural machinery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a traveling speed control device for a mobile agricultural machine.

Conventionally, mobile agricultural machines such as harvesters and tractors equipped with continuously variable transmission mechanisms such as hydraulic transmission mechanisms (H8T) have systems that automatically adjust the running speed of the machine body according to the load of working equipment such as the threshing section and the tilling section. Generally, a traveling speed control device is provided that has a switching device that can switch between automatic control, which controls the speed automatically, and manual control, which changes the speed by manual operation.

However, in conventional traveling speed control devices for general mobile machines of this type, when switching the switching device from automatic control to manual control, or from manual control to automatic control, the automatic control circuit is required in addition to operating the gear shift lever. The series of switching operations is extremely complicated and can lead to malfunctions by the driver, as the operator must open and close the switch and perform important operations on the working clutch lever at the same time. There are drawbacks.

The present invention was devised in order to eliminate the drawbacks of the conventional devices described above, and the present invention has been devised to eliminate the drawbacks of the conventional devices described above.
By moving the gear lever to a position where only the automatic operation guide path opens and closes, the gear lever can be switched between automatic and manual control automatically by carefully operating the working part clutch lever. The object of the present invention is to provide a traveling speed control device.

A traveling speed control device for a mobile agricultural machine according to the present invention that achieves the above object is provided with a speed change lever that can be selectively switched between a manually operated guideway in which the automatic control circuit is turned off and an automatically operated guideway in which the automatic control circuit is turned on. , and a regulating metal fitting movable between a position where the automatic operation guide path of the gear shift lever is closed and a position where it is opened is automatically operated by switching the off position of a working part clutch lever provided separately from the gear shift lever. Only the guideway is closed; the manual operation guideway can be opened by blocking it, or the automatic operation guideway and the manual operation guideway can be opened by switching the working part clutch lever to the engaged position. It is characterized by being configured to regulate.

1 Hereinafter, the configuration of the present invention will be explained based on embodiments shown in the drawings.

First, as shown in FIG. 1, a plurality of weeding bodies 1 are provided at the tip of the reaping and threshing machine, and a steering lever is provided on an operation panel 2 disposed on the right front side of a driver's seat 3.

Another operation panel 4 arranged on the left front side of the driver's seat 3 has a gear shift lever 5 that continuously changes the speed of the aircraft, and two working part clutch levers arranged adjacent to the gear shift lever 5. −7 and 8 are provided.

As shown in FIG. 5, the gear shift lever 5 can rotate around the mounting pin 34 in each direction of the neutral point N1 forward F and reverse R as shown in FIG. 3, and as shown in FIG.
Although it can be manually moved in the S direction using the mounting pin 26 as a fulcrum, it is normally biased and supported by the spring 24 toward the S' side in the opposite direction to the S direction.

Between the speed change lever 5 and the working part clutch lever 7, only the automatic operation guide path of the speed change lever 5 is provided, in conjunction with the switching of the working part clutch lever 7 between the off position and the on position. A regulating fitting 6 for opening and closing is provided.

Note that a throttle lever 17 and a main shift lever 18 are provided in front of the operation panel 4.

Next, as shown in FIG.
It has a structure that allows it to rotate between the solid line position and the chain line position using 9 as a fulcrum, and the spring 9 always keeps the second
It is pulled by a fixed part of the body 20 on the left side of the figure, and movement in the left direction is restricted at the solid line position where it abuts against the stopper 21.

In the embodiment shown in FIG. 2, the left side of the guide hole 6a is a manual operation guide path, and the right side is an automatic operation guide path, which moves in conjunction with switching the working part clutch lever 7 to the 1-off position. At the solid line position of the restriction fitting 6, only the right automatic operation guide path is closed, and the left manual operation guide path is in an open state with the lateral movement of the speed change lever 5 being restricted.

In addition, when the regulating metal 6 moves in conjunction with switching to the "one person" position of the actuating part clutch lever 7, the right automatic operation guide path is opened, so the operation panel 4 that guides the gear shift lever 5 When the manual operation guide path and the automatic operation guide path coexist in the guide hole a, the shift lever 5 becomes wide.
Since the lateral movement of the gear lever 5 is not restricted, manual operation and automatic operation using the shift lever 5 can be selectively performed.

Next, referring to the drawings and system diagrams shown in FIG. 3, FIG. 4, and FIG. The change is detected by the tachometer Genereke-32 shown in FIG.
-A is actuated and the electric cylinder 10 is actuated, so that the speed change lever 5 rotates around the mounting pin 34,
Furthermore, the swash plate operating lever 27 that continuously changes the rotation of the output shaft of the H8T28, which is a continuously variable transmission, changes the rotation speed of the output shaft of the H8T28 and also changes the speed of the traveling device 29. This will control the traveling speed of the aircraft so that it can work with the appropriate load.

The brake 31 shown in the embodiment of FIG. 3 applies friction to the attachment 23 of the shift lever 5, so that the shift lever 5 is not operated by force from the swash plate operating lever 27.

The limit switches 14.15 shown in FIG. 5 are provided to prevent the electric cylinder 10 from operating beyond the lowest and highest positions, and when these limit switches 14.15 are activated, The electric cylinder 10 is configured not to move in that direction.

These limit switches 14, 15 and the limit switch 13 that opens and closes the automatic control circuit are all connected to the control panel 1.
2 and a battery 11.

Further, as shown in FIG. 4, the position control fitting 30 is longer than the guide hole 6a so that the gear change lever 5 removed from the notch of the position control fitting 30 can be guided.

Next, to explain the operation shown in the embodiment of the present invention, as shown in FIG. 6 is automatically restored to the position where the automatic operation guide path of the guide hole 6a is closed, as shown by the solid line, so in the position where the automatic operation guide path is closed, the gear shift lever 5 is moved by its interlocking metal fitting 25. is automatically removed from the notch of the position control fitting 30, the limit switch 13 becomes JOFFJ, and the automatic control circuit of the DC motor 10-A is turned off. Since the shift lever 5 can only be manually operated along the manual operation guide path when the automatic control circuit is disconnected, the shift lever 5 itself can be operated between the manual operation guide path and the automatic control where the automatic control circuit is disconnected. Even if the circuit is selectively provided in the automatic operation guide path where the automatic control circuit is on, the automatic operation guide path where the automatic control circuit is on will be switched off when the working part clutch lever 7, which is provided separately from the gear shift lever 5, is turned off. Coupled with the fact that the automatic control circuit can be closed off via the regulating metal fitting 6 which is restored by switching to the position, the shift lever 5 can be automatically restricted to manual operation only.

When the working part clutch lever 7 is operated to the "on" position, the regulating fitting 6 is pushed by the working part clutch lever 7 and moves to the right about the pin 19 as a fulcrum, as shown by the chain line in FIG. However, the automatically operated guide path of the guide hole 6a is regulated to be in an open state.

As a result, the spring 24 always allows the position regulating fitting 30 to
The shift lever 5, which is biased toward the side, automatically moves to the automatic operation guide path that is in the open state, and the tip of the interlocking metal fitting 25 fixed to the shift lever 5 controls the position. It becomes possible to engage with the notch of the metal fitting 30, and in this engaged state, the limit switch 13 turns 1 ON, so the automatic control circuit of the DC motor 10-A is connected, and the DC motor 10-A is connected.
-A turns the automatic control circuit into the "on" state, and the traveling speed at which the electric cylinder 10 operates can be automatically controlled, so the gear shift lever 5 switches the actuating part clutch lever 7 to the on position. It is possible to enter the automatic control state by using the automatic operation guide path that is automatically opened by the regulating fitting 6 that moves. , Furthermore, the manual operation guide path is also opened, making use of the gear shift lever.

5 by hand in the S direction in FIG. 3, and by removing the tip of the interlocking metal fitting 25 from the notch of the position regulating metal fitting 30, the limit switch 13 becomes 1'-oppJ and the automatic control circuit is disconnected. In this state, the speed change lever 5 can be switched to manual operation such as arbitrary speed increase/deceleration or one reverse position.

In short, the travel speed control device for a mobile agricultural machine according to the present invention has a gear shift lever that can be selectively switched between a manual operation guide path in which the automatic control circuit is turned off, and an automatic and operation guide path in which the automatic control circuit is turned on. , and a regulating metal fitting movable between a position where the automatic operation guide path of the gear shift lever is closed and a position where it is opened is automatically operated by switching the off position of a working part clutch lever provided separately from the gear shift lever. The system is designed to be regulated between a position where only the guideway is closed and the manually operated guideway is opened, and a position where both the automatically operated guideway and the manually operated guideway are opened by switching the working part clutch lever to the engaged position. With this configuration, the gear shift lever that can be selectively switched between the manual operation guide path where the automatic control circuit is turned off and the automatic operation guide path where the automatic control circuit is turned on is a working part clutch lever that is provided separately from the gear shift lever. - By using the automatic operation guide path that is automatically opened by the regulating fitting that moves when the input position is switched, it is possible to enter the automatic control state, and at the same time,
At the position where the automatic operation guide path of the shift lever is opened, the manual operation guide path is also opened, so by effectively utilizing this fact, the shift lever can automatically perform both manual control and automatic control operations.
You can choose.

Moreover, even though the gear shift lever is provided so that it can be selectively switched between a manual operation guide path and an automatic operation guide path, the automatic operation guide path when the automatic control circuit is turned on is a working part clutch lever provided separately from the gear shift lever. Since the automatic control circuit is closed off via the regulating metal fitting that moves when the shift lever is switched to the off position, the shift lever can be automatically limited to manual control only.

Therefore, by automatically switching between automatic control and manual control of the gear shift lever by carefully operating the clutch lever of the working part, it is possible to make the series of complicated switching operations that were conventionally performed by the driver uneasy, and at the same time , malfunctions can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view showing the front part of a reaping and threshing machine according to an embodiment of the present invention, Fig. 2 is an enlarged plan view of a regulating fitting portion in the same embodiment, and Fig. 3 is a schematic plan view showing the front part of a reaping and threshing machine according to an embodiment of the present invention. FIGS. 4 and 5 are enlarged front views of partially sectional views showing the installed state of the continuously variable speed lever in FIG. 3, respectively, and A-
FIG. 2 is a partially cut BB side view including an A plane sectional view and a system diagram thereof. 4...Operation panel, 5...Continuously variable speed lever, 6...Restriction fitting, 6a...Guide hole, 7, 8...Working part clutch lever-19, 24...Spring, 10 ...Electric cylinder, 13,14.15...Limit switch, 28...H8T0

Claims (1)

[Claims] 1. A shift lever that can be selectively switched is provided between a manual operation guide path where the automatic control circuit is turned off and an automatic operation guide path where the automatic control circuit is turned on, and the speed change lever is positioned at a position where the automatic operation guide path is closed. The regulating fitting is movable between a position where it is opened and a position where only the automatic operation guide path is closed and the manual operation guide path is opened by switching a working part clutch lever provided separately from the gear shift lever to an off position. A traveling speed control device for a mobile agricultural machine, characterized in that the traveling speed control device for a mobile agricultural machine is configured to regulate both an automatically operated guideway and a manually operated guideway to an open position by switching a working part clutch lever to an on position.