JPH05172243A - Transmission operating device - Google Patents

Abstract

PURPOSE:To provide a transmission operating device, which enables a main piston of a transmission operating cylinder to make high speed strokes. CONSTITUTION:A transmission operating device is equipped with a high pressure air tank A and a low pressure air tank A' and through selector valves 29, 49, 30, 50, 31, 51 the high pressure air tank A and low pressure air tank A' are connected to one or more of first pressure chambers 24, 44, second pressure chambers 25, 45, and third pressure chambers 28, 48, and the high pressure air tank A is connected through selector valve to the other pressure chamber(s).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission operating device.

[0002]

2. Description of the Related Art In a large-sized vehicle, there is a large vehicle in which an electromagnetic switching valve is selectively operated in response to an operation of a shift lever, thereby operating a shift operating cylinder or a select operating cylinder to switch transmissions.

FIG. 56 shows such a transmission operating cylinder. This cylinder is operated by compressed air. The cylinder has a first cylinder chamber 2 and a second cylinder chamber 3 defined by a partition wall 1.
A main piston 4 is arranged in the first cylinder chamber 2, and a free piston 5 having a larger pressure acting area than the main piston 4 is arranged in the second cylinder chamber 3. The main piston 4 defines a first pressure chamber 7 between the piston 4 and the end wall 6 and a second pressure chamber 8 between the piston 4 and the partition wall 1. Further, the free piston 5 defines an atmospheric pressure chamber 9 between the piston 5 and the partition wall 1, and the third pressure chamber 1 is defined between the piston 5 and the end wall 10.
1 is defined. Further, the main piston 4 is provided with piston rods 12 and 13 on both sides, respectively. The piston rod 12 is for performing a shift or select operation, and the piston rod 13 is installed so as to penetrate the partition wall 1 and is in contact with the free piston 5 so that the free piston 5
Is to be sent.

The first pressure chamber 7 is passed through the first electromagnetic switching valve 14, the second pressure chamber 8 is passed through the second electromagnetic switching valve 15, and the third pressure chamber 11 is moved through the third electromagnetic valve. Switching valve 1
Each of them is connected to the air tank 17 via 6.
These electromagnetic switching valves 14, 15 and 16 open the pressure chambers 7, 8 and 11 to the atmosphere in the non-excited state, and connect the pressure chambers 7, 8 and 11 to the air tank 17 in the excited state. These electromagnetic switching valves 14, 15, 16 are controlled by the controller 18.

When the above-mentioned cylinder is a shift operation cylinder, only the first switching valve 14 is excited to supply the compressed air only to the first pressure chamber 7 and the main piston 4 to the first cylinder chamber 2 It is moved to a position (first position) closest to the partition wall 1 in the inside to perform a shift operation to one side, and by exciting the first and third switching valves 14 and 16, the first pressure chamber 7 and Compressed air is supplied to the third pressure chamber 11, the main piston 4 is moved to an intermediate position (second position) in the first cylinder chamber 2 and is operated to the neutral position, and only the second switching valve 15 is operated. Excited and second
Compressed air is supplied to the pressure chamber 8 to move the main piston 4 to the first position.
In the cylinder chamber 2, it is moved to a position closest to the end wall 6 (third position) to shift to the other side.

When the above-mentioned cylinder is a select operation cylinder, the first position of the main piston 4 is the first select position, the second position is the second select position, and the third position is the third select position. Become.

[0007]

By the way, in the above-mentioned select operation cylinder, during the shift operation of the shift operation cylinder, the fluid is maintained in the first pressure chamber 7 in correspondence with the shift position, and the main piston 4 is moved to the first position. The first pressure chamber 7 and the third pressure chamber 11 are kept in fluid at 1 select position, the main piston 4 is kept in the second select position, and the second pressure chamber 8 is kept in fluid. The main piston is held in the 3rd select position.

However, in the control described above, when the select operation of the select operation cylinder is performed subsequent to the shift operation from the shift completion position of the shift operation cylinder to the neutral position, the pressure chamber in the advancing direction of the piston 4 moves. The fluid becomes resistance. For example, when the piston 4 of the select operation cylinder held in the second select position is moved to the first select position during the shift operation, when the piston 4 moves, the fluid in the third pressure chamber 11 causes resistance. turn into.

In the shift operating cylinder, the first pressure chamber 7 is operated during the select operation of the select operating cylinder.
And the fluid is maintained in the third pressure chamber 11 to hold the main piston 4 in the second position. Then, in the next shift operation, the fluid in the third pressure chamber 11 is discharged or the first pressure chamber 11 is discharged.
The main piston 4 is operated by discharging the fluid from the pressure chamber 7 and supplying the fluid to the second pressure chamber 8.

However, in the above control, it takes a long time to discharge the fluid, and the delayed fluid becomes resistance to the movement of the main piston 4, and the operation of the main piston 4, that is, the shift operation is delayed.

An object of the present invention is to provide a transmission operating device capable of promptly operating a transmission operating cylinder.

[0012]

In a transmission operating device of the present invention, a cylinder housing is defined by a partition wall into a first cylinder chamber and a second cylinder chamber, and a main piston is arranged in the first cylinder chamber. A first pressure chamber is formed between one end surface of the main piston and an end wall of the first cylinder chamber, and a second pressure chamber is formed between the other end surface of the main piston and the partition wall, A free piston having a larger pressure acting area than that of the main piston is disposed in the second cylinder chamber, an atmospheric pressure chamber is formed between one end surface of the free piston and the partition wall, and the other end surface of the free piston is formed. A transmission operating cylinder, in which a third pressure chamber is formed between the second cylinder chamber and an end wall of the second cylinder chamber, and a free piston pushing rod penetrating the partition wall is disposed on one end surface of the main piston. And selectively supplies fluid to the first pressure chamber, the second pressure chamber, and the third pressure chamber so that the main piston comes closest to the partition wall of the first cylinder chamber, A second position where the piston is located in the middle of the first cylinder chamber and a third position where the main piston is closest to the end wall of the first cylinder chamber.
In the transmission operating device for moving to any of the positions,
A high pressure first pressure source and a low pressure second pressure source, wherein the first pressure source and the second pressure chamber are provided in at least one of the first pressure chamber, the second pressure chamber and the third pressure chamber. A pressure source is connected via a switching valve, and the first pressure source is connected to another pressure chamber via a switching valve.

[0013]

[Operation] In the transmission operating device of the present invention, before the operation of the transmission operating cylinder, a low-pressure fluid is supplied to one of the pressure chambers to maintain the position of the main piston, thereby operating the cylinder. At this time, the fluid in the pressure chamber is discharged from the low pressure state to accelerate the pressure decrease in the pressure chamber or supply the high pressure fluid to the pressure chamber in the low pressure state to accelerate the pressure increase in the pressure chamber.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 conceptually shows a transmission operating device according to the present invention. This device includes a shift cylinder 20 and a select cylinder 40 as actuators.

As shown in FIG. 2, the shift cylinder 20 has a first cylinder chamber 21 and a second cylinder chamber 22. In the first cylinder chamber 21, the main piston 23
And the first cylinder chamber 2 is provided by the piston 23.
1 is defined by a first pressure chamber 24 and a second pressure chamber 25. On the other hand, in the second cylinder chamber 22, the free piston 2
6 is provided, and the second cylinder chamber 22 is defined by the piston 26 into an atmospheric pressure chamber 27 and a third pressure chamber 28. The pressure acting area of the free piston 26 is larger than that of the main piston 23.

The first pressure chamber 2 of the shift cylinder 20
4 through the first electromagnetic switching valve 29, the second pressure chamber 25 through the second electromagnetic switching valve 30, and the third pressure chamber 28 through the third electromagnetic switching valve 31. It is connected to the air tank A and the low pressure air tank A ′.

The electromagnetic switching valves 29, 30, 31 are 4-port 3-position switching valves and are controlled by the controller B. The first electromagnetic switching valve 29 opens the first pressure chamber 24 to the atmosphere in a demagnetized state, and one coil (high-voltage side coil)
29a is excited to communicate the first pressure chamber 24 with the high-pressure air tank A, and the other coil (low-voltage side coil) 29b is excited to communicate the first pressure chamber 24 with the low-pressure air tank A '. In addition, the second electromagnetic switching valve 30 is not
The pressure chamber 25 is opened to the atmosphere, one coil (high-voltage side coil) 30a is excited to communicate the second pressure chamber 25 with the high-pressure air tank A, and the other coil (low-pressure side coil) 30b.
Are excited to communicate the second pressure chamber 25 with the low pressure air tank A '. Furthermore, the third electromagnetic switching valve 31 opens the third pressure chamber 28 to the atmosphere in a demagnetized state, and one coil (high-voltage side coil) 31a is excited to turn the third pressure chamber 28 into a high-pressure air tank A. The other coil (low-voltage side coil) 31b is excited so that the third pressure chamber 28 communicates with the low-pressure air tank A '.

The main piston 23 is provided with a piston rod 23a. One end of the piston rod 23a has the main piston 23 located in the middle of the first cylinder chamber 21 and the free piston 26 is the most first cylinder chamber. It abuts on the free piston 26 while being positioned in the 21st direction.

The select cylinder 40 has almost the same structure as the shift cylinder 20. As shown in FIG. 3, the selection cylinder 40 has the first cylinder chamber 4
It has a first cylinder chamber 42 and a second cylinder chamber 42. A main piston 43 is arranged in the first cylinder chamber 41, and the piston 43 defines the first cylinder chamber 41 into a first pressure chamber 44 and a second pressure chamber 45. On the other hand, a free piston 46 is disposed in the second cylinder chamber 42, and the piston 46 causes the second cylinder chamber 42 to move to the atmospheric pressure chamber 47 and the third pressure chamber 47.
A pressure chamber 48 is defined. The pressure acting area of the free piston 46 is larger than that of the main piston 43.

The first pressure chamber 44 of the select cylinder 40 is connected to the second pressure chamber 45 via the first electromagnetic switching valve 49.
Is connected to a high pressure air tank A and a low pressure air tank A ′ via a third electromagnetic switching valve 51, respectively.

The electromagnetic switching valves 49, 50 and 51 are 4-port 3-position switching valves and are controlled by the controller B. The first electromagnetic switching valve 49 opens the first pressure chamber 44 to the atmosphere in a demagnetized state, and the one coil (high-voltage side coil) 4
9a is excited to move the first pressure chamber 44 to the high pressure air tank A.
And the other coil (low-voltage side coil) 49b is excited to communicate the first pressure chamber 44 with the low-pressure air tank A '. The second electromagnetic switching valve 50 opens the second pressure chamber 45 to the atmosphere in a demagnetized state, and one coil (high-voltage side coil) 50a is excited to communicate the second pressure chamber 45 with the high-pressure air tank A. And the other coil (low voltage side coil) 50b
Are excited to communicate the second pressure chamber 45 with the low pressure air tank A '. Furthermore, the third electromagnetic switching valve 51 opens the third pressure chamber 48 to the atmosphere in a demagnetized state, and one coil (high-voltage side coil) 51a is excited to turn the third pressure chamber 48 into a high-pressure air tank A. The other coil (low-voltage side coil) 51b is excited so that the third pressure chamber 48 communicates with the low-pressure air tank A '.

The main piston 43 has a piston rod 43a. One end of the piston rod 43a has the main piston 43 located in the middle of the first cylinder chamber 41 and the free piston 46 is the most first cylinder chamber. It abuts on the free piston 46 while being positioned in the 41st direction.

In FIG. 1, the shift cylinder 20 and the select cylinder 40 are arranged so as to correspond to the shift pattern C. Therefore, the main piston 23 of the shift cylinder 20 is moved to the intermediate position NE of the first cylinder chamber 21.
In a state in which are located, becomes the select cylinder 40 is operational, the main piston 43 of the selector cylinder 40 is moved corresponding to N _1, N _2, N ₃ shift pattern C, select the transmission To act. Further, the main piston 43 of the select cylinder 40 is connected to the first cylinder 41.
The shift cylinder 20 becomes operable in the state where the shift cylinder 20 is located at the rightmost position S ₁ , the middle position S ₂ , and the leftmost position S ₃ in the main cylinder of the shift cylinder 20. 23 is F _{1 to} R ₁ of the shift pattern C,
It moves corresponding to F _{2 to} R ₂ and F _{3 to} R ₃ , and shifts the transmission.

The control of the cylinders 20 and 40 will be described below by way of example.

When the shift lever located at F _{1 of the} shift pattern C is returned to N ₁ and further moved to R ₂ via N ₂ , the following control is performed. In the state before the operation in which the shift lever is located at F _{1 of the} shift pattern C, the shift cylinder 20 and the select cylinder 4
0 electromagnetic switching valves 29, 30, 31, 49, 50,
51 is in a demagnetized state. Therefore, as shown in FIG. 4, the shift cylinder 20 and the select cylinder 4 are
0 pressure chambers 24, 25, 28, 44, 45, 48
Is open to the atmosphere. From this state, when the clutch pedal is stepped on and the shift lever is moved to R _{2 of the} shift pattern C, first, the low pressure side coil 49b of the electromagnetic switching valve 49 of the select cylinder 40 and the high pressure side of the electromagnetic switching valve 31 of the shift cylinder 20. The coil 31a is excited. Therefore, as shown in FIG.
The low pressure compressed air from the air tank A ′ is supplied to the first pressure chamber 44, and at the same time, the high pressure compressed air from the air tank A is supplied to the third pressure chamber 28 of the shift cylinder 20. Next, after a lapse of a fixed time t _1, the high voltage side coil 29a of the electromagnetic switching valve 29 is excited and the shift cylinder 20
High-pressure compressed air is also supplied from the air tank A to the first pressure chamber 24. Then, as shown in FIG. 6, the main piston 23 is moved in the direction in which the second pressure chamber 25 is contracted by the pressure of the first pressure chamber 24, and the main piston 23
As shown in FIG. 7, the rod 23a of the free piston 2
6 and stops at position NE. By the way, in the above control, the compressed air is supplied to the third pressure chamber 28 faster than the compressed air is supplied to the first pressure chamber 24.
This is because the pressure applied to the free piston 26 is raised in advance and the free piston 26 forms a stopper wall so that the main piston 23 does not overrun beyond the position NE. In this way, the main piston 23
As shown in FIG. 7, when the position NE (N _{1 of the} shift pattern C) is reached, it is confirmed by the position sensor, and the high-voltage side coil 51a of the electromagnetic switching valve 51 is excited based on the confirmation signal of the sensor. .. Then, high-pressure compressed air is supplied from the air tank A to the third pressure chamber 48 of the select cylinder 40, and the main piston 43 causes the first pressure chamber 48 to move by the pressure of the third pressure chamber 48 as shown in FIG. 44
Is moved in the direction to reduce. In the meantime, and after a certain time t ₂ from the excitation of the high-voltage coil 51a of the electromagnetic switching valve 51, the high-voltage coil 49a of the electromagnetic switching valve 49.
Is excited. Then, the first pressure chamber 44 becomes high pressure,
The movement of the main piston 43 is stopped at the position S ₂ . When the main piston 43 moves, the time t ₂ is the first
In order to maintain the pressure chamber 44 at a low pressure, to minimize the movement resistance of the main piston 43, and to move the main piston 43 quickly, the longer one is preferable. But,
If the time t ₂ is too long, the main piston 43 may overrun the position S ₂ . Therefore, the time t ₂ is set appropriately in consideration of such a point. Also, during this period, that is, in the shift pattern C, N ₁ to N
_While moving to ₂ , the low-voltage side coil 31b of the electromagnetic switching valve 31
Is excited, and as shown in FIGS. 8 and 9, the third pressure chamber 28 of the shift cylinder 20 is maintained at a low pressure. This is for promptly performing the next shift operation. Figure 9
As shown in, the main piston 43 of the select cylinder 40 is at the position S ₂ (that is, N _{2 of the} shift pattern C).
Is reached by the position sensor, the electromagnetic switching valve 31 is demagnetized by the confirmation signal of the position sensor, and the compressed air in the third pressure chamber 28 is discharged. At this time, the high voltage side coil 29a of the electromagnetic switching valve 29 is in an excited state.
Therefore, the main piston 2 of the shift cylinder 20
As shown in FIG. 10, 3 is moved in the direction in which the second pressure chamber 25 is contracted. At this time, since the pressure in the third pressure chamber 28 is exhausted from the low pressure state, the pressure drops rapidly, and therefore the piston 23 moves quickly. During this time, that is, while moving from N ₂ to R ₂ in the shift pattern C, the high-voltage coils 49a and 51a of the electromagnetic switching valves 49 and 51 of the selection cylinder 40 are maintained in the excited state,
The main piston 43 is held at the position S ₂ . And
As shown in FIG. 11, the main piston 23 is at the position SH.
When it reaches B (that is, R _{2 of the} shift pattern C), it is confirmed by the position sensor, and the electromagnetic switching valves 29, 49, 51 are demagnetized by the confirmation signal of the position sensor. Therefore, the pressure chambers 24, 44, 48 are different from the other pressure chambers 25, 2
Similar to Nos. 8 and 45, it is opened to the atmosphere, and as shown in FIG. 12, the shift is completed. Further, FIG. 13 is a timing chart showing the above control.

Control of the shift cylinder 20 corresponding to F ₁ to N ₁ of the shift pattern C (see FIG. 5,
In FIG. 6), the compressed air is supplied to the third pressure chamber 28 faster than the compressed air to the first pressure chamber 24 so that the main piston 23 does not overrun. Instead of, as shown in FIG. 14 and FIG.
Either the high-pressure side coil 30a or the low-pressure side coil 30b of the electromagnetic switching valve 30 of the shift cylinder 20 is temporarily excited, and the second pressure chamber 25 also receives compressed air of high pressure from the air tank A or low pressure from the air tank A '. May be temporarily supplied, and the moving speed of the main piston 23 may be suppressed by the pressure. In this case, the electromagnetic switching valve 29,
It is possible to simultaneously excite each of the high-voltage coils 29a and 31a of 31 to supply compressed air to the first pressure chamber 24 and the third pressure chamber 28 at the same time.

Next, when the shift lever located at R ₂ of the shift pattern C is put into F ₁ via N ₂ and N ₁ , the following control is performed. In the state before the operation in which the shift lever is positioned at R _{2 of the} shift pattern C, all the electromagnetic switching valves 29, 30, 31, 49, 50, 51 of the shift cylinder 20 and the select cylinder 40 are demagnetized. is there. Therefore, as shown in FIG. 16, all the pressure chambers 24, 25, 28, 44, 45, 48 of the shift cylinder 20 and the select cylinder 40 are open to the atmosphere. From this state, when the clutch pedal is depressed and the shift lever is put into F _{1 of the} shift pattern C, first, the high-voltage side coil 31a of the electromagnetic switching valve 31 of the shift cylinder 20 is excited, and as shown in FIG.
High-pressure compressed air is supplied from the air tank A to the third pressure chamber 28. Then, the main piston 23 is moved in the direction in which the first pressure chamber 24 is contracted. At this time, since compressed air is not supplied to the first pressure chamber 24, the main piston 23 can be moved quickly. Then, a fixed time t ₃
After that, the high pressure side coil 29a of the electromagnetic switching valve 29 is also excited, the high pressure compressed air is supplied from the air tank A to the first pressure chamber 24, and the main piston 23 is stopped at the position NE as shown in FIG. .. The excitation timing of the high-voltage coil 29a of the electromagnetic switching valve 29 is preferably delayed within a range where the piston 23 does not overrun at the position NE (that is, N _{2 of the} shift pattern C). On the other hand, during that time, the high pressure side coil 49a of the electromagnetic switching valve 49 of the select cylinder 40 is excited, the high pressure compressed air is supplied from the air tank A to the first pressure chamber 44, and the low pressure of the electromagnetic switching valve 51 is maintained. The side coil 51b is also excited, and low-pressure compressed air is supplied to the third pressure chamber 48 from the air tank A '. Then, as shown in FIGS. 17 and 18, the main piston 43 is maintained at the position S ₂ . This is for promptly performing the next select operation. As described above, when the main piston 23 of the shift cylinder 20 reaches the position NE (that is, N _{2 of the} shift pattern C),
It is confirmed by the position sensor, the electromagnetic switching valve 51 of the select cylinder 40 is demagnetized by the confirmation signal of the sensor, and the compressed air in the third pressure chamber 48 is discharged. Therefore, the main piston 43 is moved by the pressure in the first pressure chamber 44 in the direction of contracting the second pressure chamber 45 as shown in FIG. 19, and reaches the position S ₁ as shown in FIG. At this time, since the compressed air in the third pressure chamber 48 is discharged from the low pressure state, the pressure drops rapidly, and therefore the main piston 43 moves quickly. During this period, that is, the main piston 43 of the select cylinder 40 is at the position S
_{During the} movement from ₂ to the position S ₁ , the high-voltage side coil 31a of the electromagnetic switching valve 31 of the shift cylinder 20 is excited and the third
High-pressure compressed air is supplied to the pressure chamber 28 from the air tank A, and the low-pressure coil 29b of the electromagnetic switching valve 29 is excited, so that the first pressure chamber 24 is switched to the low-pressure air tank A '. This is for speeding up the next shift operation. As shown in FIG. 20, when the main piston 43 of the select cylinder 40 reaches the position S ₁ (that is, N _{1 of the} shift pattern C), the position sensor confirms the electromagnetic field of the shift cylinder 20 by the confirmation signal of the sensor. The switching valves 29 and 31 are demagnetized, and the high voltage side coil 30a of the electromagnetic switching valve 30 is excited. Therefore, the high pressure compressed air is supplied from the air tank A to the second pressure chamber 25 of the shift cylinder 20, and the pressure causes the main piston 23 to shrink the first pressure chamber 24, as shown in FIG. Is moved in the direction. At this time, the compressed air in the first pressure chamber 24 is discharged from a low pressure, so that the pressure drops quickly and the main piston 23 moves quickly. Then, the main piston 23 moves to the position SHA (that is, F _{1 of the} shift pattern C) as shown in FIG.
Is reached by the position sensor, the confirmation signal of the sensor demagnetizes the solenoid operated directional control valve 30 and the solenoid operated directional control valve 49 of the select cylinder 40, and the pressure chamber 25,
44 is opened to the atmosphere like the other pressure chambers 24, 28, 45 and 48. FIG. 23 shows the shift completed state. Further, FIG. 24 is a timing chart showing the above control.

Control of the shift cylinder 20 corresponding to R ₂ to N ₂ of the shift pattern C (see FIG. 17,
In FIG. 18), in order to increase the moving speed of the main piston 23, the supply of compressed air to the first pressure chamber 24 is delayed compared to the supply to the third pressure chamber 28. However, instead of such control , High-voltage side coils 29 of the electromagnetic switching valves 29, 31
a and 31a are simultaneously excited, and as shown in FIG.
High-pressure compressed air is simultaneously supplied from the air tank A to the first pressure chamber 24 and the third pressure chamber 28, and the electromagnetic switching valve 3
The high pressure side coil 30a or the low pressure side coil 30b of 0 may be excited for a certain period of time to temporarily supply the compressed air to the second pressure chamber 25. The pressure in the second pressure chamber 25 at this time increases the moving speed of the main piston 23.

In the above control, the shift cylinder 20 is operated during the period corresponding to N ₂ to N ₁ of the shift pattern C.
The first pressure chamber 24 is set to a low pressure (FIGS. 19 and 20) to speed up the next shift operation, that is, the movement of the main piston 23 from the position NE to the position SHA. 26, the high pressure side coils 29a and 31a of the electromagnetic switching valves 29 and 31 of the shift cylinder 20 are excited to supply high pressure compressed air from the air tank A to the first pressure chamber 24 and the third pressure chamber 28. In addition, the low pressure side coil 30b of the electromagnetic switching valve 30 may be excited to maintain the second pressure chamber 25 at a low pressure. By doing this, the next shift operation, that is, the main piston 23 is moved to the position NE
Solenoid valve 29, 3 in order to move from the position to the position SHA.
When 1 is demagnetized and the high pressure side coil 30a of the electromagnetic switching valve 30 is excited, the pressure in the second pressure chamber 25 rises quickly, so that the main piston 23 can be moved quickly.

When the shift lever located at N _{1 of the} shift pattern C is moved to F ₂ , each cylinder 20,
40 is controlled as follows. In the state where the shift lever is located at N _{1 of the} shift pattern C, all the electromagnetic switching valves 29, 30, 31, 49, 50, 51 are demagnetized. Therefore, all pressure chambers 24, 25, 28,
44, 45, and 48 are open to the atmosphere. Then, as shown in FIG. 27, the main piston 43 of the select cylinder 40 is maintained at the position S _1, and the main piston 23 of the shift cylinder 20 is maintained at the position NE. When the clutch pedal is stepped on from this state and the shift lever is moved to F _{2 of the} shift pattern C, the high-voltage coil 51a of the electromagnetic switching valve 51 of the select cylinder 40.
Is excited, and high-pressure compressed air is supplied from the air tank A to the third pressure chamber 48. Therefore, the main piston 4
As shown in FIG. 28, 3 is moved in the direction in which the first pressure chamber 44 is contracted. At this time, since compressed air is not supplied to the first pressure chamber 44, the main piston 43 moves quickly. Next, after a fixed time t ₄ , the high pressure side coil 49a of the electromagnetic switching valve 49 is also excited, and high pressure compressed air is supplied from the air tank A to the first pressure chamber 44 as well.
As shown in FIG. 29, the main piston 43 is moved to the position S ₂
To stop. The excitation timing of the electromagnetic switching valve 49 is set such that the main piston 43 moves to the position S ₂ (that is, the shift pattern C
It is preferable to slow it down in the range where N ₂ ) does not overrun. On the other hand, during that time, the high pressure side coils 29a and 31a of the electromagnetic switching valves 29 and 31 of the shift cylinder 20 are excited, high pressure compressed air is supplied from the air tank A to the first pressure chamber 24 and the third pressure chamber 28, and Solenoid switching valve 30
The low pressure side coil 30b is also excited, and low pressure compressed air is supplied to the second pressure chamber 25 from the air tank A '. Then, as shown in FIGS. 28 and 29, the main piston 23 is maintained at the position NE. As described above, when the main piston 43 of the select cylinder 40 reaches the position S ₂ (that is, N _{2 of the} shift pattern C) as shown in FIG. 29, it is confirmed by the position sensor, and the confirmation signal of the sensor is received. As a result, the electromagnetic switching valves 29, 31 of the shift cylinder 20 are demagnetized, and the high-voltage coil 30a of the electromagnetic switching valve 30 is excited. Therefore, FIG.
As shown in FIG. 1, the first pressure chamber 2 of the shift cylinder 20 is
The compressed air in the fourth and third pressure chambers 28 is discharged to the atmosphere,
High-pressure compressed air is supplied from the air tank A to the second pressure chamber 25. Then, the main piston 23 is moved in the direction in which the first pressure chamber 24 is contracted. At this time, since the pressure in the second pressure chamber 25 has been increased in advance, the operation of the main piston 23 is fast. Thus, as shown in FIG. 31, the main piston 23 of the shift cylinder 20 is
When the position SHA (that is, F _{2 of the} shift pattern C) is reached, it is confirmed by the position sensor, and the solenoid switching valve 30 of the shift cylinder 20 and the solenoid switching valves 49, 51 of the selection cylinder 40 are confirmed by the confirmation signal of the sensor. Degaussed, as shown in FIG. 32, all pressure chambers 24, 25,
28, 44, 45 and 48 are opened to the atmosphere. Note that FIG. 33 is a timing chart showing the above control.

Control of the shift cylinder 20 corresponding to N ₁ to N ₂ of the shift pattern C (see FIG. 2)
8, FIG. 29), a low pressure is applied to the second pressure chamber 25 in order to accelerate the next shift operation. However, instead of such control, the low pressure side coil 29b of the electromagnetic switching valve 29 is excited. As shown in FIGS. 19 and 20, the main piston 23 is moved to the position N while the first pressure chamber 24 is maintained at a low pressure.
It may be held in E. In this way, in the next shift operation, the compressed air in the first pressure chamber 24 is discharged from the low pressure state, so that the pressure drops quickly and the main piston 23
Move faster.

When the shift lever located at N _{3 of the} shift pattern C is moved to R ₂ , each cylinder 2
0 and 40 are controlled as follows. In the state where the shift lever is positioned at N _{3 of the} shift pattern C, all the electromagnetic switching valves 29, 30, 31, 49, 50, 51 are demagnetized. Therefore, all pressure chambers 24, 25, 2
8,44,45,48 are open to the atmosphere. Then, as shown in FIG. 34, the main piston 43 of the select cylinder 40 is maintained at the position S _3, and the main piston 23 of the shift cylinder 20 is maintained at the position NE. When the clutch pedal is depressed from this state and the shift lever is moved to R _{2 of the} shift pattern C, the high-voltage coil 5 of the electromagnetic switching valve 51 of the select cylinder 40 is
1a is excited, and as shown in FIG. 35, high pressure compressed air is supplied from the air tank A to the third pressure chamber 48 of the select cylinder 40. Next, after a fixed time t ₅ , the high pressure side coil 49a of the electromagnetic switching valve 49 is excited, and the high pressure compressed air is also supplied from the air tank A to the first pressure chamber 44 of the select cylinder 40. Then, as shown in FIG. 36, the main piston 43 is moved in the direction of contracting the second pressure chamber 45 by the pressure of the first pressure chamber 44, and the rod 43a of the main piston 43 is freed as shown in FIG. It abuts the piston 46 and stops at the position S ₂ . By the way, in the above control, the compressed air is supplied to the third pressure chamber 48 faster than the compressed air is supplied to the first pressure chamber 44 because the main piston 43 is at the position S ₂
This is because the pressure applied to the free piston 46 is raised in advance so as to prevent an overrun beyond the above range, and a stopper wall is formed by the free piston 46. Meanwhile, during this time,
That is, while the shift pattern C moves from N ₃ to N ₂ , the high-voltage coil 2 of the electromagnetic switching valve 29 of the shift cylinder 20 is moved.
9a is excited, high pressure compressed air is supplied from the air tank A to the first pressure chamber 24, and the low pressure side coil 31b of the electromagnetic switching valve 31 is also excited, so that the third pressure chamber 28 is compressed from the air tank A'to low pressure compressed air. Is supplied. Then, the main piston 23 of the shift cylinder 20 is maintained at the position NE. As described above, the main piston 43 of the select cylinder 40 is moved to the position S ₂ (N in the shift pattern C).
_When it reaches ₂ ), it is confirmed by the position sensor, and the electromagnetic switching valve 31 of the shift cylinder 20 is demagnetized by the confirmation signal of the sensor. Therefore, the main piston 23 of the shift cylinder 20 is, as shown in FIG.
The second pressure chamber 25 is moved in the direction of contraction. At this time,
Since the pressure in the third pressure chamber 28 is exhausted from a low pressure state, the pressure drops rapidly, and therefore the piston 23 moves quickly. Then, when the main piston 23 reaches the position SHB (that is, R _{2 of the} shift pattern C) as shown in FIG. 39, it is confirmed by the position sensor, and the electromagnetic switching valves 29, 49, 51 are confirmed by the confirmation signal of the sensor.
Is demagnetized. Therefore, the pressure chambers 24, 44, 48
Is opened to the atmosphere like the other pressure chambers 25, 28 and 45, and the shift is completed as shown in FIG. Note that FIG. 41 is a timing chart showing the above control.

Control of the select cylinder 40 corresponding to N ₃ to N ₂ of the shift pattern C (see FIG. 3)
5, FIG. 36), the supply of compressed air to the first pressure chamber 44 is delayed from the supply of compressed air to the third pressure chamber 48 so that the main piston 43 does not overrun at the position S ₂ . Instead of such control, as shown in FIG. 42, the compressed air is simultaneously supplied to the first pressure chamber 44 and the third pressure chamber 48, and the compressed air is also temporarily supplied to the second pressure chamber 45. May be supplied. In this way, the acceleration of the main piston 43 is suppressed by the pressure of the second pressure chamber 45.

When the shift lever located at F _{2 of the} shift pattern C is moved to R ₃ , each cylinder 20,
40 is controlled as follows. In the state where the shift lever is located at F _{2 of the} shift pattern C, all the electromagnetic switching valves 29, 30, 31, 49, 50, 51 are demagnetized. Therefore, all pressure chambers 24, 25, 28,
44, 45, and 48 are open to the atmosphere. Then, as shown in FIG. 43, the main piston 23 of the shift cylinder 20 is maintained at the position SHA, and the main piston 43 of the select cylinder 40 is maintained at the position S ₂ . When the clutch pedal is depressed from this state and the shift lever is moved to R _{3 of the} shift pattern C, the high-voltage coil 31a of the electromagnetic switching valve 31 of the shift cylinder 20 is moved.
Is excited, and high-pressure compressed air is supplied from the air tank A to the third pressure chamber 28 as shown in FIG. Next, after a lapse of a certain time t _6, the high pressure side coil 29a of the electromagnetic switching valve 29 is excited, and the high pressure compressed air is also supplied from the air tank A to the first pressure chamber 24. Then, as shown in FIG. 45, the main piston 23 of the shift cylinder 20 causes the second pressure chamber 25 to move due to the pressure of the first pressure chamber 24.
46, the rod 23a of the main piston 23 is moved toward the free piston 26 as shown in FIG.
And stops at the position NE. In the above control, the compressed air is supplied to the third pressure chamber 28 faster than the compressed air is supplied to the first pressure chamber 24 so that the main piston 23 does not overrun at the position NE. In advance, increase the pressure applied to the free piston 26 in advance,
This is because the free piston 26 forms a stopper wall. During this period, that is, from F ₂ to N ₂ of the shift pattern C
In the select cylinder 40, the high pressure side coil 51a of the electromagnetic switching valve 51 is excited in the select cylinder 40, and high pressure compressed air is supplied from the air tank A to the third pressure chamber 48.
Further, the low pressure side coil 49b of the electromagnetic switching valve 49 is excited, the first pressure chamber 44 is maintained at a low pressure, and the main piston 43 is maintained at the position S ₂ . The reason why the first pressure chamber 44 is maintained at a low pressure in this way is to promptly perform the next select operation. As described above, when the main piston 23 of the shift cylinder 20 reaches the position NE, it is confirmed by the position sensor, and the low pressure side coil 31b of the electromagnetic switching valve 31 is excited by the confirmation signal of the sensor, and the third pressure chamber 28 is brought to a low pressure. Further, the electromagnetic switching valves 49, 51 of the selection cylinder 40 are demagnetized, and the high-voltage side coil 50a of the electromagnetic switching valve 50 is excited. Therefore, the main piston 43 of the select cylinder 40
47 is moved in a direction in which the first pressure chamber 44 is contracted, as shown in FIG. At this time, since the first pressure chamber 44 is exhausted from the low pressure state, the resistance to the main piston 43 is small and therefore the main piston 43 is quickly moved. Then, as shown in FIG. 48, when the main piston 43 reaches the position S ₃ (that is, N _{3 of the} shift pattern C), it is confirmed by the position sensor and the electromagnetic signal of the shift cylinder 20 is confirmed by the confirmation signal of the sensor. Switching valve 3
1 is demagnetized. Therefore, as shown in FIG. 49, the main piston 23 of the shift cylinder 20 is moved by the pressure of the first pressure chamber 24 in the direction of contracting the second pressure chamber 25. At this time, since the pressure in the third pressure chamber 28 is exhausted from the low pressure state, the pressure drops rapidly, and therefore the main piston 23 moves quickly. And
As shown in FIG. 50, the main piston 23 is in the position SH.
When it reaches B, it is confirmed by the position sensor, and the electromagnetic switching valves 29, 50 are demagnetized by the confirmation signal of the sensor. Therefore, the pressure chambers 24 and 45 are different from the other pressure chambers 2.
As with 5, 28, 44, and 48, open to the atmosphere,
As shown in, the shift is completed. Note that FIG.
3 is a timing chart showing the above control.

The control of the shift cylinder 20 corresponding to F ₂ to N ₂ of the shift pattern C (see FIG. 4).
4, FIG. 45), the supply of the compressed air to the first pressure chamber 24 is delayed from the supply of the compressed air to the third pressure chamber 28 so that the main piston 23 does not overrun at the position NE. Instead of such control, as shown in FIG. 14, while simultaneously supplying compressed air to the first pressure chamber 24 and the third pressure chamber 28, compressed air is also temporarily supplied to the second pressure chamber 25. May be supplied. In this way, the acceleration of the main piston 23 is suppressed by the pressure of the second pressure chamber 25.

Control of the select cylinder 40 corresponding to F ₂ to N ₂ of the shift pattern C (see FIG. 4)
4, FIG. 45, and FIG. 46), the select cylinder 40
The first pressure chamber 44 is maintained at a low pressure in order to promptly perform the next operation of No. 1. However, instead of such control, as shown in FIG. Pressure chamber 48
May be maintained at a high pressure, and the low pressure side coil 50b of the electromagnetic switching valve 50 may be excited to maintain the second pressure chamber 45 at a low pressure. In this way, the pressure in the second pressure chamber 45 rises faster in the next select operation, and the start of the main piston 43 is faster accordingly.

In the above, the shift lever is shifted to the shift pattern C.
N ₁ to F ₁ , F ₁ to R ₂ , R ₂ to F ₁
, N ₁ to F ₂ , N ₃ to R ₂ , and F
_Although the control in the case of operating from ₂ to R _{3 has} been explained, the speed of the shift cylinder 20 and the select cylinder 40 can be increased or each main piston 23,
It is possible to prevent overrun of 43.

In the above embodiment, a 4-port 3-position switching valve is used as a control means for selectively communicating the shift cylinder 20 and the select cylinder 40 with the high pressure air tank A, the low pressure air tank A'and the atmosphere. Although it is adopted, as shown in FIG. 54, it is also possible to adopt a set of two 3-port 2-position switching valves instead of the 4-port 3-position switching valve.

In this case, the first pressure chamber 24 (44) of the cylinder 20 (40) is connected to the electromagnetic switching valve 29 '(4
9 ') and 29 "(49") are open to the atmosphere and only the electromagnetic switching valve 29' (49 ') is excited,
It is connected to the high pressure air tank A, and the electromagnetic switching valve 29 "(4
When only 9 ") is excited, it is communicated with the low pressure air tank A '. Also, the second pressure chamber 2 of the cylinder 20 (40).
5 (45) is an electromagnetic switching valve 30 '(50'), 30 "
When it is opened to the atmosphere through (50 ″) and only the electromagnetic switching valve 30 ′ (50 ′) is excited, it is communicated with the high pressure air tank A and only the electromagnetic switching valve 30 ″ (50 ″) is excited. Then, the air is communicated with the low-pressure air tank A '. Furthermore, the third pressure chamber 28 (4) of the cylinder 20 (40).
8) is an electromagnetic switching valve 31 '(51'), 31 "(5
1 ″) and open to the atmosphere, and the electromagnetic switching valve 31 ′
When only (51 ') is excited, it is communicated with the high pressure air tank A, and when only the electromagnetic switching valve 31 "(51") is excited, it is communicated with the low pressure air tank A'.

Further, instead of the control means shown in FIG. 54,
The control means shown in FIG. 55 can also be adopted. In this control means, the first pressure chamber 24 of the cylinder 20 (40) is
(44) is open to the atmosphere through the electromagnetic switching valves 29 '(49') and D, and when only the electromagnetic switching valve 29 '(49') is excited, it is communicated with the high pressure air tank A, When only the electromagnetic switching valve D is excited, the low pressure air tank A '
Be communicated to. The second pressure chamber 25 (45) of the cylinder 20 (40) is open to the atmosphere via the electromagnetic switching valves 30 '(50') and D, and the electromagnetic switching valve 30 '(5).
When only 0 ') is excited, it is communicated with the high pressure air tank A, and when only the electromagnetic switching valve D is excited, it is communicated with the low pressure air tank A'. Furthermore, the cylinder 20 (4
The third pressure chamber 28 (48) of (0) is the electromagnetic switching valve 31 '.
(51 '), open to the atmosphere via D, and when only the electromagnetic switching valve 31' (51 ') is energized, it is communicated with the high pressure air tank A, and when only the electromagnetic valve D is energized, It communicates with the low pressure air tank A '.

In the above embodiment, the cylinder 20 (4
0) pressure chambers 24 (44), 25 (45), 28 (4)
8) can be switched to the low pressure air tank A ',
In order to increase the speed of the piston 23 (43) in the cylinder 20 (40) only in one direction, only a part of the pressure chamber can be switched to the low pressure air tank A ′.

[0042]

As described above, in the transmission operating device according to the present invention, the low-pressure fluid is supplied to one of the pressure chambers to maintain the position of the main piston before the operation of the transmission operating cylinder. Every other time, when the cylinder is operated, by discharging the fluid in the pressure chamber from a low pressure state, the pressure drop in the pressure chamber is accelerated, or the high pressure fluid is supplied to the pressure chamber in the low pressure state. The pressure rise can be accelerated. Therefore, the speed of the main piston can be increased.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a transmission operating device according to the present invention.

FIG. 2 is a cross-sectional view showing a shift cylinder of the transmission operating device according to the present invention.

FIG. 3 is a cross-sectional view showing a select cylinder of the transmission operating device according to the present invention.

FIG. 4 is a conceptual diagram of an actuator showing a shift completed state in F ₁ of a shift pattern C.

FIG. 5 is a conceptual diagram showing a starting state of the actuator at F ₁ of shift pattern C.

FIG. 6 is a conceptual diagram showing states of actuators from F ₁ to N ₁ of shift pattern C.

FIG. 7 is a conceptual diagram showing a state of an actuator at a position corresponding to N _{1 of a} shift pattern C.

FIG. 8 is a conceptual diagram showing states of actuators N ₁ to N ₂ of a shift pattern C.

FIG. 9 is a conceptual diagram showing a state of the actuator at a position corresponding to N _{2 of} shift pattern C.

FIG. 10 is a conceptual diagram showing states of actuators from N ₂ to R ₂ of shift pattern C.

FIG. 11 is a conceptual diagram showing a state of the actuator which has reached R _{2 of the} shift pattern C.

FIG. 12 is a conceptual diagram of an actuator showing a shift completed state in R ₂ of a shift pattern C.

FIG. 13 is a timing chart of electromagnetic switching valves from F ₁ to R ₂ of shift pattern C.

FIG. 14 is a conceptual diagram showing another embodiment of the operation of the actuator from F ₁ to N ₁ of the shift pattern C.

FIG. 15 is a conceptual diagram showing another embodiment of the state of the actuator at the position corresponding to N _{1 of the} shift pattern C.

FIG. 16 is a conceptual diagram of an actuator showing a completed shift state of shift pattern C at R ₂ .

FIG. 17 is a conceptual diagram showing states of actuators from R ₂ to N ₂ of shift pattern C.

FIG. 18 is a conceptual diagram showing a state of the actuator which has reached N _{2 of} shift pattern C.

FIG. 19 is a conceptual diagram showing states of actuators from N ₂ to N ₁ of shift pattern C.

FIG. 20 is a conceptual diagram showing a state of the actuator which has reached N _{1 of} shift pattern C.

FIG. 21 is a conceptual diagram showing states of actuators from N ₁ to F ₁ of shift pattern C.

FIG. 22 is a conceptual diagram showing a state of the actuator which has reached F _{1 of the} shift pattern C.

FIG. 23 is a conceptual diagram of an actuator showing a shift completed state in F ₁ of shift pattern C.

FIG. 24 is a timing chart of the electromagnetic switching valve from R ₂ to F ₁ of shift pattern C.

FIG. 25 is a conceptual diagram showing another embodiment of the states of the actuator from R ₂ to N ₂ of the shift pattern C.

FIG. 26 is a conceptual diagram showing another embodiment of states of the actuators N ₂ to N ₁ of the shift pattern C.

FIG. 27 is a conceptual diagram showing a state of the actuator when the shift lever is at the position N ₁ of the shift pattern C.

FIG. 28 is a conceptual diagram showing states of the actuators N ₁ to N ₂ of the shift pattern C.

FIG. 29 is a conceptual diagram showing a state of the actuator which has reached N _{2 of} shift pattern C.

FIG. 30 is a conceptual diagram showing states of actuators from N ₂ to F ₂ of shift pattern C.

FIG. 31 is a conceptual diagram showing a state of the actuator which has reached F _{2 of} shift pattern C.

FIG. 32 is a conceptual diagram of an actuator showing a shift completed state in F ₂ of shift pattern C.

FIG. 33 is a timing chart of electromagnetic switching valves from N ₁ to F ₂ of shift pattern C.

FIG. 34 is a conceptual diagram showing a state of the actuator when the shift lever is at the position N ₃ of the shift pattern C.

FIG. 35 is a conceptual diagram showing a starting state of the actuator at N ₃ of shift pattern C.

FIG. 36 is a conceptual diagram showing states of actuators from N ₃ to N ₂ of shift pattern C.

FIG. 37 is a conceptual diagram showing a state of the actuator which has reached N _{2 of} shift pattern C.

FIG. 38 is a conceptual diagram showing states of actuators from N ₂ to R ₂ of shift pattern C.

FIG. 39 is a conceptual diagram showing a state of the actuator which has reached R _{2 of the} shift pattern C.

FIG. 40 is a conceptual diagram of an actuator showing a completed shift state of shift pattern C at R ₂ .

FIG. 41 is a timing chart of electromagnetic switching valves from N ₃ to R ₂ of shift pattern C.

FIG. 42 is a conceptual diagram showing another embodiment of states of the actuators N ₃ to N ₂ of the shift pattern C.

43 is a conceptual diagram showing a state of the actuator when the shift lever is at the position F ₂ of the shift pattern C. FIG.

FIG. 44 is a conceptual diagram showing a starting state of the actuator at F ₂ of shift pattern C.

FIG. 45 is a conceptual diagram showing states of actuators from F ₂ to N ₂ of shift pattern C.

FIG. 46 is a conceptual diagram of the actuator showing a state where the shift pattern C reaches N ₂ .

FIG. 47 is a conceptual diagram showing states of actuators from N ₂ to N ₃ of shift pattern C.

FIG. 48 is a conceptual diagram of an actuator showing a state where N _{3 of a} shift pattern C is reached.

FIG. 49 is a conceptual diagram showing states of actuators from N ₃ to R ₃ of shift pattern C.

FIG. 50 is a conceptual diagram of the actuator showing a state where R _{3 of the} shift pattern C is reached.

FIG. 51 is a conceptual diagram of an actuator showing a shift completed state at R ₃ of shift pattern C.

52 is a timing chart of electromagnetic switching valves from F ₂ to R ₃ of shift pattern C. FIG.

FIG. 53 is a conceptual diagram showing another embodiment of states of the actuators from F ₂ to N ₂ of the shift pattern C.

FIG. 54 is a piping diagram showing another control means of the transmission operating device according to the present invention.

FIG. 55 is a piping diagram showing still another control means of the transmission operating device according to the present invention.

FIG. 56 is a conceptual diagram showing an actuator to which the present invention is applied.

[Explanation of symbols]

 20 shift cylinder 40 select cylinder 21,41 first cylinder chamber 22,42 second cylinder chamber 23,43 main piston 23a, 43a piston rod 24,44 first pressure chamber 25,45 second pressure chamber 26,46 free Piston 27,47 Atmospheric pressure chamber 28,48 Third pressure chamber 29,49 First electromagnetic switching valve 30,50 Second electromagnetic switching valve 31,51 Third electromagnetic switching valve A High pressure air tank A'Low pressure air tank B controller C shift pattern

Claims (1)

[Claims] 1. The cylinder housing is provided with a first partition wall.
A cylinder chamber and a second cylinder chamber are defined, a main piston is disposed in the first cylinder chamber, and a first pressure chamber is provided between one end face of the main piston and an end wall of the first cylinder chamber. And a second pressure chamber is formed between the other end surface of the main piston and the partition wall, and a free piston having a larger pressure acting area than the main piston is arranged in the second cylinder chamber. An atmospheric pressure chamber is formed between one end face of the piston and the partition wall, a third pressure chamber is formed between the other end face of the free piston and the end wall of the second cylinder chamber, and the main piston is further provided. A transmission operating cylinder having a free piston pushing rod penetrating the partition wall at one end surface thereof is used to selectively supply fluid to the first pressure chamber, the second pressure chamber and the third pressure chamber. hand,
The first position where the main piston is closest to the partition wall of the first cylinder chamber, the main piston is the first position
In a transmission operating device for moving a second position located in the middle of a cylinder chamber and the main piston to a third position closest to the end wall of the first cylinder chamber, a high pressure first pressure source A low pressure second pressure source,
The first pressure source and the second pressure source are connected to at least one of the first pressure chamber, the second pressure chamber, and the third pressure chamber via a switching valve, and to the other pressure chamber. A transmission operating device, wherein the first pressure source is connected via a switching valve.