JPH0615905B2 - Gear change operation device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a gear shift operating device, and particularly to electrically detecting a turning operation position of an operating lever and transmitting an electrical signal accompanying the detection to a transmission. The present invention relates to a device for transmitting gears by transmitting them to a gear shift operating portion.

[Outline of Invention]

The present invention detects the operation speed of the operation lever by the detection means, calculates the reaction force corresponding to the operation speed by the calculation means, and controls the pressure variable pressure reducing valve according to the calculation result. The reaction force applied by the air cylinder is changed according to the operation speed of the operation lever, so that the required response force is generated.

[Prior Art] Generally, an engine of a vehicle is provided with a transmission, and a gear ratio is changed by this transmission so that the engine speed is changed to an appropriate value and transmitted to the drive wheels. When the gear shift operation is performed, the gear is selected by the operation lever. When the transmission is provided near the driver's seat, the force of the operating lever is directly or indirectly transmitted to the operating mechanism to perform the gear shifting operation.

However, when there is a large distance between the driver's seat and the transmission, such as in a rear engine bus or a large truck, it is necessary to connect the operating lever provided in the driver's seat and the gear shift operation part of the transmission with a long rod. There is. When a gear shift operation is performed through such a long rod, there is a problem that a large force is required for the gear shift operation, not only tires but also the feeling of operation is deteriorated and the response is delayed. Therefore, in such buses and trucks, the operation position of the operation lever is electrically detected, and an electric signal accompanying this detection is transmitted to the gear shift operating portion of the transmission to perform gear shifting. Power is greatly reduced.

[Problems to be solved by the invention]

According to such a speed change operation device, it is not necessary to perform a speed change operation by the turning force of the operation lever, and it suffices to perform the turning operation necessary for electrical detection, and therefore, the operation force is extremely high. Becomes smaller. Then, the responsiveness of the operating lever is lost, and the operability is rather deteriorated.
Therefore, in such a transmission, an air cylinder for applying a reaction force is provided so that when the gear shift lever is rotated, the reaction force is applied by the piston rod of the air cylinder. However, in such a conventional device, since the air pressure applied to the air cylinder is set so that an appropriate reaction force is generated when the speed change operation speed is a normal speed, a rapid turning operation is performed. However, there was a problem that the response power was insufficient. Further, when the loose operation is performed, there is a problem that the reaction force by the air cylinder is too large and the response force becomes too large.

The present invention has been made in view of the above problems, and an optimum reaction force is always applied according to the rotation speed of the operation lever, so that the response force is not excessive or insufficient. It is an object of the present invention to provide a gear shift operation device as described above.

[Means for solving problems]

The present invention provides a device for electrically detecting a rotational operation position of an operation lever and transmitting an electric signal associated with the detection to a gear shift operation portion of a transmission to perform a gear shift. An air cylinder that applies a reaction force to the operation lever during a turning operation, an air pressure source that supplies air pressure to the air cylinder, and a variable pressure reducing valve that decompresses the air pressure supplied from the air pressure source to the air cylinder in a changeable manner. A detection means for detecting the operation speed of the operation lever, a calculation means for calculating a reaction force corresponding to the operation speed, and a control for controlling the pressure variable pressure reducing valve according to the calculation result of the calculation means. Means for changing the reaction force applied by the air cylinder according to the operation speed of the operation lever.

[Action]

Therefore, according to the present invention, the pressure variable pressure reducing valve is controlled according to the rotation speed of the operation lever, and the air pressure supplied to the air cylinder is adjusted. As a result, the reaction force applied by the air cylinder is changed, and the optimum reaction force is always generated according to the rotation speed of the operation lever, so that the response force does not become excessive or insufficient.

〔Example〕

One embodiment of the present invention will be described below. FIG. 1 shows a gear shift operating device for a rear engine bus according to an embodiment of the present invention.
Is provided. At the top of this lever 10 is a knob 11
Is attached, and the spherical portion 12 at the lower end is the support portion 1
It is supported by 3, which allows the lever 10 to swing. A detection unit 14 for detecting the rotational operation position of the lever 10 is provided on the base side of the lever 10. The detection unit 14 includes a switch capable of detecting an operation speed according to each rotational operation position, and is connected to the microcomputer 15. The microcomputer 15 supplies a control signal to a gear shift operation portion 17 of a transmission 16 attached to an engine provided in the rear portion of the vehicle to perform gear shift operation. The microcomputer 15 is also connected to a clutch sensor 19 provided below the clutch pedal 18.

Air cylinders 36 are provided on both sides of the operating portion provided with the change lever 10, and the inner piston 2 held in the outer piston 20 of the air cylinder 36.
1 is brought into contact with an abutting plate 22 provided on the lever 10, so that an appropriate reaction force is applied during a gear shift operation. The outer piston 20
Is a stopper 37 to prevent the air cylinder 36 from jumping out.
The movement of the inner piston 21 is restricted by the stopper 38 so as not to fly out from the outer piston 20, and when one of the left and right pistons is in contact with the lever 10, the other is separated. The air cylinder 36 is connected to the air tank 24 through the air pipe 23, and the pressure variable pressure reducing valve 25 is connected to the air pipe 23 at an intermediate position thereof.
The pressure reducing valve 25 is controlled by the microcomputer 15.

The structure of the pressure reducing valve 25 will be described in detail. As shown in FIG. 2, the pressure reducing valve 25 is provided with a diaphragm 26, and a pressing plate 27 is arranged above the diaphragm 26. The pressing plate 27 is pushed by the coil spring 28. The upper end of the coil spring 28 is received by the spring bearing 29, and the spring bearing 29 is connected to the lower end of the operating shaft 30. The operating shaft 30 is engaged with a female screw hole 31 provided in the casing of the pressure reducing valve 25, and is coupled with an output shaft of a step motor 33 by a coupling 32. The step motor 33 is driven by a drive circuit 34, and the drive circuit 34 is controlled by the microcomputer 15.

In the structure described above, when the change lever 10 shown in FIG.
The operation position of is detected by the position detection unit 14, and this detection signal is sent to the microcomputer 15. Therefore, the microcomputer 15 sends a control signal to the gear shift operating portion 17 of the transmission 16, and the gear shift operation is performed in this operating portion 17. This causes the transmission 16 to switch to the desired gear ratio. When supplying a control signal for gear shifting to the actuating portion 17, the microcomputer 15 is configured to calculate whether or not the engine speed exceeds a predetermined speed. If it is expected that the control signal is not supplied to the actuating portion 17, the gear shifting operation of the transmission 16 is prevented.

When the lever 10 rotates during the above-described gear shifting operation, the contact plate 2
Reference numeral 2 makes contact with the inner piston 21 in the outer piston 20 of the air cylinder 36, thereby generating a response force. Therefore, the completion of the synchronization can be known by the reaction force of the air cylinder 36, and the timing for releasing the clutch pedal 18 can be obtained.

At the time of this gear shift operation, the rotational speed of the change lever 10 is obtained from the calculation result of the microcomputer 15 according to the detection of the detection unit 14. The microcomputer 15 stores the relationship between the operating speed of the lever 10 and the air pressure generated by the pressure reducing valve 25 as shown in FIG. 3, for example. The microcomputer 15 calculates based on such data, and controls the step motor 33 shown in FIG. 2 via the drive circuit 34. Then, the repulsive force of the spring 28 of the pressure reducing valve 25 is adjusted by the rotation of the output shaft. Therefore, the back pressure of the diaphragm 26 that receives the air pressure changes, and the output pressure of the pressure reducing valve 25 can be adjusted according to the operation speed of the speed change lever 10.
The air cylinder 36 generates a reaction force according to the operation speed.

Therefore, according to the gear shift operation device of the present embodiment, the repulsive force of the air cylinder 36 at the time of gear shift operation of the change lever 10 changes according to its operating speed, and accordingly the operating force of the knob 11 also changes. It will change. That is, when a sudden operation is performed, the characteristics shown by the chain line in FIG. 4 are obtained. On the other hand, when the normal operation is performed, the characteristic shown by the solid line in the figure is obtained. Alternatively, when a gentle operation is performed, the characteristic shown by the dotted line in FIG. 4 is obtained. Therefore, sometimes the change lever 10
It becomes possible to eliminate the lack of responsiveness at the time of sudden operation of, and thereby it becomes possible to inform the driver of the completion of synchronization completely. From this, the clutch pedal 1
It is possible to improve the operation mistake of No. 8.

〔The invention's effect〕

According to the present invention, a reaction force is applied to the operation lever by an air cylinder when the operation lever is rotated, and a variable pressure source pressure valve is provided between an air supply source that supplies air pressure to the air cylinder and the air cylinder. The operating speed of the operating lever is detected by the detecting means, the reaction force is calculated according to the operating speed, and the pressure variable pressure reducing valve is controlled by the control means according to the calculation result of the calculating means. In this configuration, the reaction force applied by the air cylinder is changed according to the operating speed of the operating lever. Therefore, with such a configuration, it is possible to eliminate the lack of responsiveness especially when the operating lever is rapidly operated, and it is possible to completely notify the driver of the completion of synchronization and eliminate the mistaken operation of the clutch. It will be possible.

[Brief description of drawings]

FIG. 1 is a block diagram showing a shift operating device according to an embodiment of the present invention, FIG. 2 is a partially cutaway front view showing the structure of a pressure variable pressure reducing valve, and FIG. 3 is a lever operating speed. FIG. 4 is a graph showing the relationship with the air pressure, and FIG. 4 is a graph showing the relationship between the stroke of the lever and the operating force of the knob. In the reference numerals used in the drawings, 10 ... Change lever 14 ... Rotation operation position detection unit 15 ... Microcomputer 16 ... Transmission 17 ... Gear shift operation unit 20 ... Outer piston 21 ... Inner piston 24 ... Air tank 25 ... Variable pressure reducing valve 33 ... Step motor 36 ... Air cylinder.

Claims (1)

[Claims] 1. A position for rotating a control lever is electrically detected.
The electrical signal associated with this detection.
Transmission to the gear shift operation part of the
In this device, this operation is performed when the operation lever is rotated.
The air cylinder that gives a reaction force to the work lever and this air cylinder
From an air pressure source that supplies air pressure to the
Depressurizable air pressure supplied to the air cylinder
The variable pressure reducing valve and the operating speed of the operating lever.
The detection means for detecting and the reaction force corresponding to the operating speed
Arithmetic means obtained by arithmetic and the arithmetic result of this arithmetic means
Control means for controlling the pressure variable type pressure reducing valve according to
The air cylinder is installed according to the operating speed of the operating lever.
It is characterized by changing the reaction force
Gear shifting operation device.