JPH0241389Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a remote control device for a transmission, and is an improved gear removal operation.

BACKGROUND ART Vehicles, especially large route buses, frequently start and stop, so a large number of gear change operations are performed while driving. However, in conventional buses, a long rod mechanically connects the change lever in the driver's seat to the transmission at the rear of the vehicle at a distance of approximately 10 meters, and the gears are changed via this rod. As a result, the operating force and stroke of the change lever are large, which causes driver fatigue.

Therefore, instead of connecting the change lever and transmission with a rod, a remote-controlled transmission as shown in FIGS. 1 and 2 was developed. This is finger touch control.
It is called a transmission and is constructed so that the operating force and stroke of the change lever are small. To explain the outline with reference to Figs. 1 and 2, a change lever unit 1 is connected to a control box 2 at the rear of the vehicle body by an electrical wiring 3, and the operation of the change lever is detected by a switch etc. At the signal, change lever unit 1 to control box 2
can be conveyed to. The control box 2 receives this signal, confirms with the clutch switch 22 that the clutch is disengaged, and then operates the electromagnetic valve 5 of the gear shift unit 4. The electromagnetic valve 5 transfers the compressed air in the air tank 7 to the cylinder 6.
This cylinder 6 is used to change the speed of the transmission 8. In FIG. 1, 9 is an airline, 10 is a clutch pedal, 11 is a master cylinder, 12 is an oil line, 13 is a clutch booster, and 14 is an engine. Also,
In FIG. 2, the solid line indicates the direction of actuation, and the broken line indicates the direction of reaction force. Further, FIG. 3 shows an example of the change lever operation, where A and B are shift directions and C is a select direction.

By the way, in the case of the change lever operation as shown in Fig. 3, in order to operate the transmission with a fluid pressure cylinder, separate cylinders are used for shifting in each direction of A and B, and the neutral position N is set at the first position. It is determined using the differential pressure between the pressure-receiving areas of the cylinders. Furthermore, separate cylinders are used for selection in the reciprocating direction C, and the selection position is determined using the differential pressure between the pressure receiving areas of the pair of cylinders.
An example is shown in FIGS. 4a to 4c. In Figure 4, 6A
6B is a cylinder for shifting in the A direction, and 6B is a cylinder for shifting in the B direction, each with a small piston 15.
and a large piston 16. The large piston 16 has a substantially U-shaped cross section, and the small piston 15 is inside the large piston 16.
is movable, but since there is an inwardly bent edge 17 on the opening side of the large piston 16, the small piston 15 cannot come out. A pair of cylinders 6
For A and 6B, the small pistons are piston rod 1.
8, and their midpoint D is connected to the transmission. Figure 4a is, for example, 4
Figure b shows the neutral state, and figure c shows the fifth gear shift state. Note that 19 is an air inlet/outlet, which is connected to a solenoid valve. To shift from the neutral position, just supply air to one cylinder and open the other. In this case, only the small piston 15 moves in one cylinder, but in the other cylinder, the small piston 15 comes into contact with the bent edge 17 of the large piston 16, and the large piston 16 also moves due to the movement of the small piston 15. do.

However, in order to shift from the shift position to neutral, it is necessary to reliably position the gear in the neutral position, so it is necessary to operate both cylinders, and in the past, the cylinders were operated at the same time. In other words, the electromagnetic valve for one cylinder 6A is
If MVA is used, and the electromagnetic valve for the other cylinder 6B is MVB, a control signal is given from the control box so as to simultaneously turn on and off as shown in FIG. In this case, to explain the operation with reference to FIG. 4a, air is supplied to the two cylinders 6A and 6B at the same time, but initially
In cylinder 6B, only the small piston 15 tries to move due to pressure, so the piston rod is moved by the differential pressure. 18 begins to move in the neutral direction. Then, at the point where the large piston 16 of the cylinder 6A stops, the small piston 15 of both cylinders
Since they both receive pressure, there is a balance here, and the position is neutral. The above-mentioned configuration and operation are the same for the pair of cylinders for selection. Piston rod 18 for shifting
The select piston rod is perpendicular to this.

However, as mentioned above, since the differential pressure between the pressure receiving areas is used to shift from the shift position to neutral, there is a problem that the force received by the piston as a whole is weak and the movement is somewhat slow. In particular, at the beginning of the movement, the movement is slow due to static friction. This means that it takes a long time to shift, and the shift feeling given to the driver is also not good. Note that these problems become more noticeable when the air pressure is low.

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, it is an object of the present invention to provide a remote control device for a transmission that can shorten the time required to change gears from a shift position to neutral.

The structure of the present invention that achieves this object includes a change lever unit that is provided near the driver's seat and has a shift position detection means that detects the position of the change lever according to the driver's operation, and a clutch that detects the disengaged state of the clutch. Switch, 1st, 2nd
first and second shift cylinders each having a large piston and first and second small pistons that are movably provided within the first and second large pistons and are connected to each other by a shift rod; first and second shift electromagnetic valves that respectively control supply and discharge of compressed air to the first and second shift cylinders; a mechanical transmission that is shifted to a shift position or a neutral position by the shift rod; A shift position detection means for detecting a shift position of the transmission, a shift position detection means for detecting a shift position of the transmission, a shift position detection means for detecting a shift position of the transmission, a shift position detection means for detecting a shift position of the transmission; A control device is provided for controlling the opening and closing of the first and second shift electromagnetic valves, respectively, in order to switch to one of the first and second shift solenoid valves, and when a shift operation of the change lever from the shift position to the neutral position is detected, A remote control device for supplying compressed air to each of the shift cylinders and shifting the transmission from a shift position to a neutral position, wherein the control device receives detection signals from the shift position detection means and the shift position detection means. and a delay control means for detecting a shift operation of the change lever from the shift position to a neutral direction and outputting either an output signal to the first or second shift electromagnetic valve after a predetermined time delay. Furthermore, when the shift rod is located on the second shift cylinder side, the delay control means:
The signal output to the first shift electromagnetic valve is delayed from the signal output to the second shift electromagnetic valve, and conversely, the shift rod outputs the signal to the first shift electromagnetic valve.
If the shift cylinder is located on the shift cylinder side, the signal output to the second shift electromagnetic valve is
It is characterized in that it is configured to output a signal later than the signal output to the shift electromagnetic valve.

An embodiment of the present invention will be described below with reference to the drawings. 6a and 6b show an example of electromagnetic valve control, and FIG. 7 shows an example of the configuration of the control system. The explanation will be made assuming that the change lever for the transmission is operated as shown in FIG. 3, and the cylinder is as shown in FIG. 4.

Now, put the cylinders 6A and 6B in the position shown in Figure 4a.
Suppose there is a piston and the transmission is in the R, 2nd or 4th gear shift position.
In this case, shift rod 18 is placed on the cylinder 6A side.
As shown in Fig. 6a, only the solenoid valve MVA for cylinder 6A that provides the operating force in the neutral direction is first turned on, and the solenoid valve MVA for the other cylinder 6B is turned on after a time lag r. do. In this way, the other cylinder 6B is open during the time lag τ, so the large piston 1 of the cylinder 6A
The pressure received at step 6 directly becomes the operating force, allowing for quick operation. The time lag τ may be any time necessary to overcome static friction at the beginning of movement, and is, for example, about 0.5 seconds.

If the pistons of cylinders 6A and 6B are in the positions shown in Figure 4c and the transmission is selected to shift to 1st, 3rd, or 5th gear, conversely, the shift rod 18 is located on the cylinder 6B side. Therefore, as shown in Fig. 6b, only the solenoid valve MVB for cylinder 6B is first turned on, and then, after a time lag τ, the other cylinder 6A is turned on.
Turn on the solenoid valve MVA. By providing a time lag τ between the operations of the two electromagnetic valves in this way, the movement from the shift position to neutral becomes faster, the shift time is shortened, and the shift feeling is improved. Also, fast movement can be achieved even with low air pressure.

FIG. 7 shows an example of the configuration of a device that realizes control of the electromagnetic valves shown in FIGS.
A device 21 for detecting whether the change lever has been operated to the next position, and a device (clutch switch) 22 for detecting that the clutch is actually disengaged.
The signal 2 given to the electromagnetic valve by the logic operation function of the control device in the control box 2.
We are making 3A and 23B. Note that 24 is an AND gate. The control device of control box 2 requires that the clutch switch is turned on and the clutch is currently disengaged, and that the transmission is currently in the shift position, and that the driver moves the shift lever to the next position (neutral or other). (including the shift position), the control signals shown in FIGS. 6a and 6b are given to the electromagnetic valve. Note that which mode of FIG. 6 a or b in which the control signal is output is selected depending on the detection content of the shift position detection device 20.

That is, the control device of the control box 2 is the shift position detection device 20 of the transmission 8.
and a detection device 21 for detecting the shift position of the change lever 1
In addition to means for controlling the opening and closing of a pair of shift electromagnetic valves MVA and MVB so as to switch the transmission 8 to either the shift position or the neutral position according to the detection signal from the clutch switch 22, a delay control is also provided. have the means.

As described above, this delay control means detects the shift operation of the change lever 1 from the shift position to the neutral direction based on the detection signals from the shift position detection device 20 and the shift position detection device 21, and detects the shift operation from the shift position of the change lever 1 to the neutral direction, and controls the pair of electromagnetic valves MVA and MVB. Either one of the output signals is output after a predetermined time τ delay.
Specifically, this delay control means, as described above,
When the shift rod 18 is located on the cylinder 6B side, the output signal to the other electromagnetic valve MVA is delayed by τ from the output signal to the electromagnetic valve MVB for the cylinder 6B. Conversely, when the shift rod 18 is located on the cylinder 6A side, it is configured to output the output signal to the other solenoid valve MVB with a delay of τ from the output signal to the solenoid valve MVA for this cylinder 6A. There is.

As explained above, according to the present invention, when changing the transmission from the shift position to neutral due to the differential pressure between the pressure receiving areas of a pair of cylinders,
Since the cylinder is operated with a time lag, the cylinder overcomes static friction and starts moving smoothly. This shortens the shift time and improves the shift feeling. Furthermore, since compressed air is supplied to both cylinders after a time lag, jumping to the opposite shift position is prevented. Note that the present invention is applicable not only to air-type cylinders but also to various types of fluid pressure cylinders. Of course, it is also useful when fluid pressure is low.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of an example of a transmission remote control device, Fig. 2 is a block configuration diagram thereof, Fig. 3 is an explanatory diagram showing an example of change lever operation, and Fig. 4 is a configuration of a fluid pressure cylinder. FIG. 5 is an explanatory diagram showing an example of the electromagnetic valve control along with its operation mode. FIG. 5 is an explanatory diagram of conventional electromagnetic valve control. FIG. 6 is an explanatory diagram of an example of electromagnetic valve control according to the present invention. FIG. In the drawing, 1 is a change lever unit, 2 is a control box, 4 is a gear shift unit,
5 is a solenoid valve, 6, 6A, 6B are cylinders, 7
is an air tank, 8 is a transmission, 10 is a clutch pedal, 15 is a small piston, 16 is a large piston, 17 is a bent edge of the large piston, 18 is a piston rod, 20 is a transmission shift position detection device, 21 is a detection device for detecting the next position of the change lever, and 22 is a clutch switch.

Claims (1)

[Scope of Claim for Utility Model Registration] A change lever unit provided near the driver's seat and having a gear shift position detection means for detecting the position of the change lever according to the driver's operation; a clutch switch for detecting the disengaged state of the clutch; First and second large pistons each having a first and second large piston, and first and second small pistons that are movably provided within the first and second large pistons and are connected to each other by a shift rod. a shift cylinder; first and second shift electromagnetic valves that respectively control the supply and discharge of compressed air to the first and second shift cylinders; a mechanical type that is shifted to a shift position or a neutral position by the shift rod; A transmission, a shift position detecting means for detecting a shift position of the transmission, a shift position detecting means for detecting a shift position of the transmission, a shift position detecting means for detecting a shift position of the transmission, a shift position detecting means for detecting a shift position of the transmission, and a shift position detecting means for detecting a shift position of the transmission. a control device that controls the opening and closing of the first and second shift electromagnetic valves, respectively, in order to switch the shift lever to either one of the shift positions; 1. A remote control device for supplying compressed air to each of the second shift cylinders and shifting the transmission from a shift position to a neutral position, wherein the control device includes the shift position detection means and the shift position detection means. A delay for detecting a shift operation of the change lever from the shift position to the neutral direction based on a detection signal from the shift lever, and outputting either the output signal to the first or second shift electromagnetic valve after a predetermined time delay. Further, when the shift rod is located on the second shift cylinder side, the delay control means controls the signal output to the first shift electromagnetic valve to the second shift cylinder. If the signal is output later than the signal output to the electromagnetic valve, and conversely, the shift rod is located on the first shift cylinder side, the signal output to the second shift electromagnetic valve is output later than the signal output to the second shift electromagnetic valve. A remote control device for a transmission, characterized in that the device is configured to output a signal later than the signal output to a solenoid valve.