JPH04181062A - Travel speed change control device - Google Patents

Abstract

PURPOSE:To improve safety by setting constitution in such a way that even if an indication is given so as to switch consecutively from a forward condition to a backward condition or from the backward condition to the forward condition, if the indication is not given again after its travel motion is stopped once, the forward condition and the backward condition can not be switched with each other. CONSTITUTION:In a travel speed change device 1, a speed change operation can be carried out by means of either a speed change lever 3 or an electric motor 8, and in a control device 17, in the case a forward side indicating condition or a backward side indicating condition is directed by means of a speed change' switch SW1, when a travel motion stoppage condition is detected by means of a shift position detecting sensor SW2, the electric motor 8 is stopped automatically. Furthermore, after a stoppage indicating condition is directed by means of the speed change switch SW1 when a vehicle is in the travel motion stoppage condition, according to a direction of the forward side indicating condition or the backward side indicating condition, the motor 8 is operated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a traveling transmission device that can reversibly shift from the fastest forward state to the fastest reverse state via a stopped state, and a method for operating the traveling transmission device. an actuator to move the actuator, a forward direction instruction state in which the actuator is operated to the fastest forward state, a reverse direction instruction state in which the actuator is operated to the fastest reverse state, and a stop instruction state in which the actuator is stopped. The present invention relates to a traveling speed change control device that is provided with a freely manually operated indicating means and a control means for operating the actuator based on instructions from the indicating means.

[Conventional technology]

This type of traveling speed change control device described above changes the traveling speed change device from the fastest forward state by simply switching the manually operated instruction means between a forward direction instruction state, a reverse direction instruction state, and a stop instruction state. This allows the vehicle to reversibly change gears from a stopped state to the fastest reverse state.

[Problem to be solved by the invention]

However, since the traveling transmission is capable of reversibly shifting from the fastest forward state to the fastest reverse state via the stopped state, it is possible to change gears from the fastest forward state to the fastest reverse state or from the fastest reverse state to the fastest reverse state. There is a risk that the vehicle will be instructed to continuously shift gears to the fastest forward speed without stopping.

If you change gears continuously from the fastest forward mode to the fastest reverse mode or from the fastest reverse mode to the fastest forward mode without stopping the vehicle, the impact when switching from forward to reverse or from reverse to forward will increase, resulting in safety issues. decreases.

The present invention has been made in view of the above-mentioned circumstances, and is capable of reversibly shifting from the fastest forward state to the fastest reverse state via the stopped state using an actuator.
To improve safety when continuously switching from the fastest forward state to the fastest backward state or from the fastest backward state to the fastest forward state.

[Means to solve the problem]

The present invention provides a traveling transmission that can reversibly shift from the fastest forward state to the fastest reverse state via a stopped state, an actuator that operates the traveling transmission, and an actuator that operates the actuator to the fastest forward state. a manually operated indicating means that can be freely switched between a forward direction instruction state in which the actuator is moved to the fastest reverse state, a reverse direction instruction state in which the actuator is operated to the fastest reverse state, and a stop instruction state in which the actuator is stopped; A control means for operating the actuator based on an instruction is provided, and its characteristic configuration is as follows.

A first characteristic configuration is that a traveling stop state detection means is provided for detecting whether or not the traveling transmission is in the traveling stopped state, and the control means is configured to control the forward direction instruction state or the reverse direction by the indicating means. The actuator is configured to automatically stop the actuator when the travel stop state is detected by the travel stop state detection means when the side instruction state is being instructed, and when the travel stop state is in the travel stop state, the instructing means The actuator is configured to operate when the forward direction instruction state or the reverse direction instruction state is instructed after the stop instruction state is instructed by the driver.

A second characteristic configuration is that a traveling stop state detection means is provided for detecting whether or not the traveling transmission is in the traveling stopped state, and the control means is configured to control the forward direction instruction state or the reverse direction by the indicating means. The actuator is configured to automatically stop the actuator when the travel stop state is detected by the travel stop state detecting means when the side instruction state is instructed, and when the travel stop state is in the travel stop state, the instructing means The actuator is configured to operate as the forward direction instruction state or the reverse direction instruction state is continuously instructed for a set time.

A third characteristic configuration is that the instruction means includes an operating tool that can be switched to a position corresponding to each of the forward direction instruction state, the reverse direction instruction state, and the stop instruction state, and the operation tool is operable. The point is that the tool is biased back to the position corresponding to the stop instruction state.

[For production]

To explain the common parts between the first and second characteristic configurations, in order to switch the traveling transmission from forward to reverse or from reverse to forward, the forward direction instruction state or the reverse direction instruction state is instructed by the instruction means. When the actuator is activated to the traveling stop state, the vehicle is automatically stopped, and even if the forward direction instruction state or the reverse direction instruction state continues to be indicated, the vehicle is automatically stopped. There is.

In the first characteristic configuration, the actuator is actuated when the stop instruction state is instructed by the instruction means when the vehicle is in the traveling stop state, and then the forward direction instruction state or the reverse direction instruction state is instructed. This makes it impossible to switch from the forward state to the reverse state or from the reverse state to the forward state unless the vehicle is stopped and the indicating means is operated again.

On the other hand, in the second characteristic configuration, the actuator is actuated when the forward direction instruction state or the reverse direction instruction state is continuously instructed by the instruction means for a set time when the vehicle is in the stopped state. Unless the vehicle is stopped and the indicating means is operated continuously for a predetermined period of time, the vehicle cannot be switched from the forward state to the reverse state or from the reverse state to the forward state.

In the third characteristic configuration, when the operation of the operating tool is stopped, the state is automatically returned to the stop instruction state.

〔Effect of the invention〕

Therefore, in the first characteristic configuration and the second characteristic configuration, even if an instruction is given to continuously switch from a forward state to a reverse state or from a reverse state to a forward state, the command is issued again after stopping the vehicle. Otherwise, it would not be possible to switch between forward and forward motion, improving safety.

With the third characteristic configuration, the operability of the instruction means can be improved without reducing safety.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a traveling speed change control device for a combine harvester will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, a hydraulic continuous transmission (1) is provided as a traveling transmission that can reversibly shift from the fastest forward state to the fastest reverse state via the stopped state, The operating lever (2) of the transmission (1) is interlocked with a manual gear shift lever (3) and a linkage rod (4). The speed change lever (3) can be freely swung back and forth around the horizontal axis (Pl), and can be stopped and held at any operating position.

Although not described in detail, the gear shift lever (3) is attached to a boarding control section (not shown). Further, the transmission device (1) is in a running stop state when the shift lever (3) is at a neutral position in its swing range, and swings the shift lever (3) forward from the running stop state. As the speed change lever (3) swings rearward from the stopped state, the speed change lever (3) is operated toward the fastest backward state.

To explain the operating structure of the transmission (1), there is a bracket (5) that supports the base end of the transmission lever (3).
) is rotatably supported around the horizontal axis (Pl), and a thin disk-shaped ring gear (7) is fixed to the boss portion (6) of this bracket (5). This ring gear (7
) is engaged with a drive gear (9) that is rotationally driven by an electric motor (8) serving as an actuator. A friction plate (10) is sandwiched between the bracket (5) and the ring gear (7). Also provided is a disc spring (11) that presses the bracket (5) toward the ring gear (7).

With this, the traveling transmission (1) is moved to the speed change lever (3).
) and the electric motor (8), the speed change lever (3) can be stopped and held at the current operating position by the biasing force of the disc spring (11). It is.

For safety, in order to prevent continuous shifting from the fastest forward state to the fastest reverse state or from the fastest reverse state to the fastest forward state, the above-mentioned shift is performed as shown in FIG. Guide hole (12) through which the lever (3) is inserted
A guide plate (13) is provided which is bent in a lateral direction intersecting the swinging direction of the speed change lever (3) at a position corresponding to the traveling stop state. , and the shift lever (3) is rotated along the horizontal axis (Pl), which is the pivot axis thereof.
) is supported by the bracket (5) in a swingable state around a horizontal axis (P2) that intersects with the spring (1
4), the shift lever (3) is pressed and biased toward the right side in the drawing, and when operating from the forward drive state side to the reverse drive state side, the shift lever (3) is moved at the neutral position (N) corresponding to the stopped state. It is designed so that it cannot be switched to the reverse mode unless it is tilted to the left. In other words, when switching from the fastest forward state to the fastest reverse state or from the fastest reverse state to the fastest forward state through the stopped state, the shift lever (3) must be rotated in the stopped state. This restricts the vehicle from being able to switch between forward and backward movement unless the vehicle is tilted horizontally, which intersects the two directions, and operated forward and backward.

Therefore, the electric motor (8) as the actuator
When performing a gear shift operation, the shift lever (3) is oscillated around the horizontal axis (P2) in the neutral position (N) where the vehicle is stopped, and the above-mentioned restriction is released, and then the forward and backward movement is performed. It may be necessary to switch the system. Therefore, the first
As shown in FIG. 3 and FIG. 3, when the shift lever (3) is in a position corresponding to the traveling stop state, the shift lever (3) is pressed in the lateral direction to adjust the horizontal axis (P2). Regulation release lever (15) that swings around to release regulation
A solenoid (16) is provided as an actuator for driving the restriction release lever (15). However, when operating the gear shift lever (3) from the forward drive state side to the reverse drive state side, the solenoid (16) is maintained in the OFF state so that it cannot be operated beyond the neutral position (N) to the reverse drive side. When it is in the position (N), it is switched to the ON state and the speed change lever (3) is moved to the reverse side of the guide hole (12) to release the restriction. Conversely, when operating the gear shift lever (3) from the reverse side to the forward side, the solenoid (16) must be kept in the ON state so that it cannot be operated beyond the neutral position (N). , the regulation is released by switching to the OFF state and moving the gear shift lever (3) to the forward side of the guide hole (12).

In FIG. 1, (SW2) is a shift position detection sensor as a running stop state detection means for detecting whether the transmission (1) is in the running stop state, and uses a potentiometer. the transmission lever (3);
It is linked to the bracket (5). (17) is a control device as a control means that controls the operation of the electric monitor (8) and the solenoid (16) based on information from an instruction means to be described later.

To explain the instruction means, as shown in FIG. 1, there are a forward instruction state in which the electric motor (8) is operated to the fastest forward state, a reverse instruction state in which the electric motor (8) is operated to the fastest reverse state, and , a shift switch (SW1) that is equipped with an operating lever (18) that can be freely swung in the front and rear directions and is biased to return to a neutral state as a manually operated instruction means that can be switched between a stop instruction state and a stop instruction state. Or, a lifting lever for operating a control valve (not shown) for a hydraulic cylinder (not shown) as an actuator for raising and lowering a reaping section (not shown), which is installed at the front of the machine so that it can be raised and lowered. It is attached to the tip of (19). In other words, the gear can be changed at the same time as the reaping section is raised and lowered.

Next, the operation of the control device (17) will be described in detail based on the flowchart shown in FIG.

When the control operation is started, first, the speed change switch (
The operating state of SW1) is determined.

When the speed change switch (SW1) is in a stop instruction state corresponding to a running stop state, the electric motor (8)
operation will be stopped and the current gear shifting state will be maintained.

When the shift switch (SW1) is operated toward the forward state or when the shift switch (SW1) is operated toward the reverse state, the shift device ( 1) Determine whether or not the vehicle is in a stopped state.

When the transmission (1) is not in a stopped state, that is, when it is in a forward or reverse state and is running, the shift position detection sensor (S
Based on the information in W2), it is determined whether the operating limit has been reached. In other words, if it is in the forward direction direction, it is determined whether or not it is at the upper limit corresponding to the fastest forward state, and if it is in the reverse direction direction, it is determined whether it is at the lower limit corresponding to the fastest backward state. You will need to determine whether it exists or not.

If the upper or lower operation limit has been reached, the process of determining the operation state of the shift switch (SW1) will be repeated, and only if the operation limit has not been reached, the shift will be changed to the instructed forward state. Alternatively, the electric motor (8) is operated in the reverse state.

When the shift switch (SW1) is operated toward the forward state or when the shift switch (SW1) is operated toward the reverse state, whether the shift position detection sensor (SW2) detects a stopped state. If the stop state is detected, after the stop state has been reached, the shift switch (SW1) is operated to return to the stop instruction state, and then the vehicle is moved in the same direction again. It is determined whether or not an instruction is being performed.

After the shift switch (SW1) has been operated to return to the stop instruction state, if the same direction is again operated, the solenoid (16) is actuated to move the shift lever (3) laterally. The electric motor (8) is operated so as to swing to release the restriction at the position corresponding to the traveling stop state and subsequently shift to the forward state or reverse state.

In other words, the control device (17) as the control means is configured to control the running stop state detection means when the forward direction instruction state or the reverse direction instruction state is instructed by the shift switch (SW1) as the instruction means. It is configured to automatically stop the electric motor (8) as the actuator when the travel stop state is detected by a shift position detection sensor (SW2) as a shift position detection sensor (SW2), and when in the travel stop state, the Shift switch (SW1
), the electric motor (8) is operated when the forward direction instruction state or the reverse direction instruction state is instructed after the stop instruction state is instructed.

[Another example]

In the above embodiment, the shift switch (S
When the forward direction instruction state or the reverse direction instruction state is indicated by W1), the shift position detection sensor (SW2) serving as the travel stop state detection means detects the travel stop state and the electric motor (8) acts as an actuator. After automatically stopping the vehicle, when the vehicle is in the stopped state, the shift switch (SW1) is used to indicate a stop instruction state, and then the forward direction instruction state or the reverse direction instruction state is again instructed. Although the case is illustrated in which the motor (8) is configured to operate, when the motor (8) is in the stopped state, the speed change switch (SW1) continuously indicates the forward direction instruction state or the reverse direction instruction state for a set time. The electric motor (8) may be configured to be operated as the electric motor (8) increases.

Further, in the above embodiment, a regulating means for regulating the operation of the gear shift lever (3) when the vehicle is stopped is provided.
Although the case is illustrated in which the lever (15) for releasing the restriction and the solenoid (16) that drives the lever (15) are used, for example, as shown in FIG.
) The guide hole (12) formed in the guide plate (13) of
It is formed in a straight line so that there is no restriction at the position corresponding to the stopped state, and the neutral position (corresponding to the stopped state) is
N), the groove (2) formed at the bottom of the gear shift lever (12)
A pair of left and right regulation plates (21) that fit into the gear shift lever (12) and regulate the operation of the gear shift lever (12) are provided with a spring (22) biasing them back toward the top plate.
21) may be operated to the release side by an actuator (8) such as a solenoid, and the specific configuration of the means for regulating the speed change lever (3) when the vehicle is stopped can be changed in various ways.

Further, in the above embodiment, the traveling stop state detection means for detecting whether or not the transmission (1) is in the traveling stopped state uses a potentiometer that detects the current operating state of the transmission (1). The shift position detection sensor (SW
2) is shown as an example, but for example, if the transmission device (
1) Alternatively, it may be configured as a switch type that is turned on when the vehicle is stopped, and the specific configuration of the vehicle stop state detecting means can be changed in various ways.

Further, in the above embodiment, the case where the present invention is applied to a travel speed change control device for a combine harvester is illustrated, but the present invention can be applied to a travel speed change control device for various work vehicles, and the specific configuration of each part is as follows. Various changes can be made.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the traveling speed change control device according to the present invention,
Figure 1 is a side view showing the speed change operation structure and control configuration;
3 is a schematic plan view of the guide plate of the speed change lever, and FIG. 4 is a flowchart of the control operation. FIG. 5 is a rear view showing the main parts of another embodiment of the regulating means. (1)... Travel transmission, (8)...
Actuator, (17)... Control means, (1
8)... Operating tool, (SW1)... Instruction means, (SW2)... Running stop state detection means.

Claims (1)

[Claims] 1. A traveling transmission (1) that can reversibly shift from the fastest forward state to the fastest reverse state via a stopped state, and an actuator (8) that operates the traveling transmission (1). ), a forward instruction state in which the actuator (8) is operated to the fastest forward state, a reverse instruction state in which the actuator (8) is operated to the fastest reverse state, and the actuator (8) is stopped. A manually operated instruction means (SW_
1) and a control means (17) that operates the actuator (8) based on an instruction from the instruction means (SW_1).
The travel speed change control device is provided with a travel stop state detection means (SW_2) for detecting whether or not the travel transmission device (1) is in the travel stop state, and the travel stop state detection means (SW_2) is provided with ) is the traveling stop state detection means (SW_2) when the forward direction instruction state or the reverse direction instruction state is instructed by the instruction means (SW_1).
The actuator (8) is configured to automatically stop the actuator (8) when the running stop state is detected by the actuator, and
When the running is stopped, the instruction means (SW_1
) is configured to operate the actuator (8) when the forward direction instruction state or the reverse direction instruction state is instructed after the stop instruction state is instructed. 2. A traveling transmission (1) that can reversibly shift from the fastest forward state to the fastest reverse state via a stopped state, an actuator (8) for operating the traveling transmission (1), and an actuator (8) for operating the traveling transmission (1). 8) to the fastest forward state, a reverse direction state to operate the actuator (8) to the fastest reverse state, and a stop command state to stop the actuator (8). Manually operated instruction means (SW_
1) and a control means (17) that operates the actuator (8) based on an instruction from the instruction means (SW_1).
The travel speed change control device is provided with a travel stop state detection means (SW_1) for detecting whether or not the travel transmission device (1) is in the travel stop state, and the travel stop state detection means (SW_1) is provided with ) is the traveling stop state detection means (SW_2) when the forward direction instruction state or the reverse direction instruction state is instructed by the instruction means (SW_1).
The actuator (8) is configured to automatically stop the actuator (8) when the running stop state is detected by the actuator, and
When the running is stopped, the instruction means (SW_1
) The traveling speed change control device is configured to operate the actuator (8) when the forward instruction state or the reverse instruction state is continuously instructed for a set time. 3. The traveling speed change control device according to claim 1 or 2,
The instruction means (SW_1) includes an operating tool (18) that can be switched to a position corresponding to each of the forward direction instruction state, the reverse direction instruction state, and the stop instruction state, and the operation tool (18) The traveling speed change control device is biased to return to a position corresponding to the stop instruction state.