JPH0538291Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a transmission actuating device.
The gear shifting operation of the transmission is performed by a piston-cylinder device operated by fluid pressure such as air pressure, and the piston-cylinder device is controlled to cut off the supply of electric current by a central control device located near the driver's seat. controlled by a solenoid valve.
As described above, in the conventional transmission actuating device in which the supply of fluid pressure is controlled by a central control device, it becomes impossible to select the gear position of the transmission due to damage to the central control device or poor contact of the electrical contacts. . This makes it impossible for vehicles to run, which is extremely dangerous, especially if the failure occurs at a railroad crossing or on a highway. For this reason, there has been a need for a simple means of shifting gears that can quickly and reliably avoid emergencies. The present invention has been proposed in view of the above, and includes a select piston that limits a first select pressure chamber and a second select pressure chamber in a transmission actuating device that shifts a transmission to a gear position according to a shift operation of a shift lever. a select cylinder device that performs a select operation of the transmission, a shift cylinder device that has a shift piston that limits a first shift pressure chamber and a second shift pressure chamber, and performs a shift operation of the transmission, and each of the pressure chambers described above. a first select solenoid valve disposed in a first select pressure passage that communicates the fluid pressure source with the first select pressure chamber; a second select solenoid valve disposed in a second select pressure passage that communicates the two select pressure chambers; a first select solenoid valve that communicates the fluid pressure supply source with the first shift pressure chamber;
A first shift solenoid valve disposed in the shift pressure passage, a second shift solenoid valve disposed in a second shift pressure passage communicating the fluid pressure supply source with the second shift pressure chamber, and a second shift solenoid valve disposed in the shift pressure passage; A centralized control device that controls the supply of current to each of the solenoid valves according to the signal from the detected shift lever switch to perform gear shifting operations of the transmission, and is formed independently of the centralized control device and also has the same centralized control. A control mechanism is provided that is activated only when the device fails to control the supply of current to each of the solenoid valves, and the control mechanism is provided in the current supply circuit of each of the solenoid valves and is connected to a movable contact and each of the solenoid valves. A manually operated switch having a plurality of connected fixed contacts is connected to each of the first and second shift solenoid valves through each diode provided in a direction that allows only the operating current of each solenoid valve. A direction that allows only the operating current of the first fixed contact of the manually operated switch, each of the first and second shift solenoid valves, and/or each of the first and second select solenoid valves. a second fixed contact of the manually operated switch connected via each diode provided in the first and second fixed contacts;
The third fixed contact of the manually operated switch is connected to one of the shift solenoid valves through each diode provided in a direction that allows only the operating current of the solenoid valve. This is a transmission actuating device that uses a simple electric circuit consisting of a manual operating switch and a diode to reliably perform gear shifting operations using a manual operating switch, even if the central control device malfunctions. This is something that can be provided. That is, for example, if the movable contact is located at the first fixed contact, each diode is provided in a direction that only allows the operating current of each solenoid valve, so only the first and second shift solenoid valves are operated. The current flows backward from the first and second shift solenoid valves to the other fixed contacts, and the current is not supplied from the other fixed contacts to the other solenoid valves so that the solenoid valves are not operated. Therefore, by sequentially moving the movable contact starting from the first fixed contact, a plurality of predetermined solenoid valves out of the four solenoid valves are operated simultaneously to sequentially perform the gear shifting operation. This has the effect that a transmission actuating device for emergency escape can be configured with an extremely simple electric circuit. An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Reference numeral 2 denotes a shift actuating device provided in the selection actuating section 4 of the transmission, which includes a select cylinder device 6 for performing a select operation, a shift cylinder device 8 for performing a shift operation, and a first select pressure passage for both cylinder devices 6 and 8. 10, an air tank 18 that supplies air pressure through the second select pressure passage 12, the first shift pressure passage 14, and the second shift pressure passage 16, and a current from the power source 20 to the solenoid valves installed in each of the pressure passages. It is equipped with a control device 22 that controls supply.
The select cylinder device 6 includes the first cylinder body 2
4 and the second cylinder body 26 are fixed to each other to constitute a select cylinder, and a select piston 28 is disposed with a gap between the inner wall 27 and the select piston 28. Activate select. An annular first auxiliary piston 32 and a second auxiliary piston 34 are fitted into the select piston 28 so as to close a gap with the inner wall 27, and the select piston 28, the first auxiliary piston 32, and the first cylinder A first select pressure chamber 36 is formed by the main body 24, and a second select pressure chamber 38 is formed by the select piston 28, the second auxiliary piston 34, and the second cylinder main body 26. 40 is the first,
Stoppers for second auxiliary pistons 32, 34, 4
2, 44, 46, and 48 are seal members. 1st
The first select pressure passage 1 is provided in the select pressure chamber 36.
0 is communicated, and the first select solenoid valve 50 provided in the first select pressure passage 10 communicates with the air tank 18 or opens to the atmosphere.
Further, a second select pressure passage 12 is communicated with the second select pressure chamber 38, and a second select solenoid valve 52 provided in the second select pressure passage 12 is connected to the second select pressure chamber 38.
It is communicated with the air tank 18 or opened to the atmosphere. The shift cylinder device 8 includes a first cylinder body 54
and a second cylinder main body 56 are fixed to each other to constitute a shift cylinder, and a shift piston 60 is disposed with a gap between the inner wall 58 and the shift piston 60, and a rod 62 connected to the shift piston 60 shifts the selection actuator 4. Activate it. The above shift piston 6
0, an annular first auxiliary piston 64 and a second auxiliary piston 6 are installed so as to close the gap with the inner wall 58.
6 are fitted, and the shift piston 60 and the first
A first shift pressure chamber 68 is formed by the auxiliary piston 64 and the first cylinder body 54, and a second shift pressure chamber 70 is formed by the shift piston 60, the second auxiliary piston 66, and the second cylinder body 56. has been done. 72 is a stopper for the first and second auxiliary pistons 64, 66; 74, 76, 78, 80;
is a sealing member. The first shift pressure chamber 68 communicates with the first shift pressure passage 14, and is communicated with the air tank 18 or opened to the atmosphere by a first shift solenoid valve 82 provided in the first shift pressure passage 14. A second shift pressure passage 16 is also communicated with the second shift pressure chamber 70, and communicated with the air tank 18 or opened to the atmosphere by a second shift solenoid valve 84 provided in the second shift pressure passage 16. . Next, the control device 22 will be explained. The control device 22 includes a shift lever switch 86 disposed near the driver's seat, and each solenoid valve to operate the select cylinder device 6 and the shift cylinder device 8 in response to selection and shift operations by the shift lever switch 86. 50,5
It has a central control device 88 that controls the energization of the solenoid valves 50, 52, 84, and separately from the central control device 88.
It has a control circuit 90 that controls energization to 82 and 84. The control circuit 90 includes a rotary switch 94, which is a manually operated switch having a movable contact 92 that operates in the rotational direction, and fixed contacts 96, 98, 100, 102, 104, 10 of the rotary switch 94.
6, 108, 110 and 112, each solenoid valve 5 connected via a diode circuit group 114.
0, 52, 82, 84 earth circuits 116, 11
It has 8,120,122. Further, the control circuit 90 includes a movable contact 92 of the rotary switch 94.
However, the fixed contacts 96, 98, other than the neutral contact 104,
100, 102, 106, 108, 110, 11
2, the first relay 12 is arranged in parallel with the power supply circuit 124 connected to the power supply 20.
6 and a second relay 128, the first relay 12
6 is ground circuit 116, 118, 120, 122
switches 130, 132, 134,
136, and the second relay 128 operates a switch 142 provided in an auxiliary power circuit 140 that connects the power source 20 and the power circuit 138 of each solenoid 50, 52, 82, 84. When the first relay 126 is not energized, each switch 1
30 to 136 are connected and actuated, and when energized, they are cut off. The second relay 128 operates to cut off the switch of the auxiliary power supply circuit 140 when it is not energized, and operates to connect when it is energized. Each of the contacts 96 to 112 of the rotary switch 94 is activated to supply electricity to the power supply circuit 124 and each of the ground circuits 116 to 122 as shown in Table 1.

[Table] The operation according to the energization operation shown in Table 1 will be explained below. The central control device 88 selects and
When a shift operation is being performed, the movable contact 92 of the rotary switch 94 is held at the contact 104 position, and each solenoid valve 50, 52, 82, 84 is energized only by the central control device 88 to select・Shift operation is performed. When the central control device 88 is out of order, the rotary switch 94 performs a select/shift operation. First, when the movable contact 92 is sequentially rotated from the neutral contact 104 position toward the contacts 106 to 112, the contact 1
At the 06 position, the power supply circuit 124 is energized,
By the operation of the first relay 126 and the second relay 128, the switches 132 to 136 are cut off, the ground circuits 116 to 122 are cut off, and the switch 142 is cut off.
Only connected to each solenoid valve 50, 52, 8
The auxiliary power circuit 140 to 2,84 is closed.
At the same time, the ground circuits 120 and 122 are grounded via the diode and the movable contact 92, and the first and second
The shift solenoid valves 82 and 84 are energized,
The pressure of the air tank 18 is supplied to the first and second shift pressure chambers 68 and 70, and the shift piston 60 is held at the neutral position, and the rod 62 is moved to N1 shown in FIG.
- Select and hold at the neutral position of N3 position. Next, when the movable contact 92 is rotated to the contact 108 position, in addition to the contact 106 position, the first and second select solenoid valves 50 and 52 are energized, and the first and second select solenoid valves 50 and 52 are energized.
The air tank 18 is in the second select pressure chamber 36, 38.
pressure is supplied, the select piston 28 is held at the neutral position, and the rod 30 is actuated to selectively hold it at the neutral position of the N2 position shown in FIG. Next, when the movable contact 92 is rotated to the contact 110 position, the first shift solenoid valve 82 is de-energized, the pressure in the first shift pressure chamber 68 is released to the atmosphere, and the shift piston 60 and rod 62 are moved to the first shift solenoid valve 82.
Move upward in the figure and select and hold the 2nd gear position. Further, when the movable contact 92 is rotated to the contact 112 position, each solenoid valve 50, 52, 82, 84
energization is stopped, and the first and second shift pressure chambers 6
8, 70 and first and second select pressure chambers 36, 3
8 is all released to the atmosphere, and the shift piston 6
0 and rod 62, and select piston 28
The rod 30 then becomes free without any biasing force, and the transmission actuating device 4 is held at the second speed position. That is, despite a failure of the central control device 88, the second speed is selected and maintained, and forward travel is possible for the time being. Next, when the movable contact 92 is rotated in the opposite direction from the neutral contact 104, the power supply circuit 124 is first energized at the contact 102 position as described above, and the ground circuits 120 and 122 are grounded, and the first and second shift solenoids are The valves 82 and 84 are energized, the shift piston 60 is held at the neutral position, and the rod 62 is selectively held at the neutral positions N1 to N3 shown in FIG. Next, when the movable contact 92 is rotated to the contact 100 position, in addition to the contact 102 position, the first select solenoid 50 is energized, and the select piston 28
and press the rod 30 to the left in FIG. 1 to select the N1 position. Further, when the movable contact 92 is rotated to the contact 98 position, the first select solenoid 50 is activated to energize the second shift solenoid 84, and the shift piston 60 and rod 62 are pushed upward in FIG. 1 and moved backward (R). Select and hold position. When the movable contact 92 is further rotated to the contact 96 position, energization to each solenoid valve 50, 52, 82, 84 is stopped, and the first and second shift pressure chambers 68,
70 and the first and second select pressure chambers 36 and 38 are all released to the atmosphere, and the shift piston 60 and rod 62, as well as the select piston 28 and rod 30, are in a free state without any biasing force, and the shift actuating device 4 is held in the reverse (R) position. Therefore, according to this embodiment, in a state where each solenoid valve 50, 52, 82, 84 cannot be operated due to a failure of the central control device 88, poor contact, etc., the movable contact of the rotary switch 94 By sequentially moving 92 from the neutral contact 104 position, the 2nd gear position or the reverse position is selectively activated and held, so it is possible to travel for a while and stop and leave it at a railroad crossing or on a highway. The vehicle can be driven safely and has the effect of being safe. Further, according to this embodiment, even if a position such as 3rd or 5th gear is selected due to a failure of the central control device 88, the rotary switch 94 can be rotated to shift the gear to the neutral position. N1~N3
Since the convenient gear position can be selected and operated, the operation is reliable. Further, according to this embodiment, the simple electric circuit of the rotary switch 94 and the diode circuit group 114 makes it possible to provide an inexpensive and lightweight transmission operating device.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram showing a speed change actuating device according to an embodiment of the present invention, and FIG. 2 is a schematic explanatory diagram of a control device in FIG. 1. 2... Speed change actuation device, 4... Selection actuation section, 6...
...Select cylinder device, 8...Shift cylinder device, 10...First select pressure passage, 12...
Second select pressure passage, 14... First shift pressure passage, 16... Second shift pressure passage, 18... Air tank, 20... Air tank, 22... Control device, 50... First select solenoid valve, 52 …
...Second select solenoid valve, 82...First shift solenoid valve, 84...Second shift solenoid valve, 86...Shift lever switch, 88...Centralized control device, 90...Control circuit, 94...
...Rotary switch.

Claims (1)

[Scope of utility model registration request] A transmission actuating device that shifts a transmission to a gear position in response to a gear shift operation of a shift lever, which has a select piston that limits a first select pressure chamber and a second select pressure chamber, and performs a select operation of the transmission. a cylinder device, a shift cylinder device that has a shift piston that limits a first shift pressure chamber and a second shift pressure chamber and performs a shift operation of the transmission; a fluid pressure supply source that supplies fluid pressure to each of the pressure chambers; a first select solenoid valve disposed in a first select pressure passage that communicates between the fluid pressure supply source and the first select pressure chamber; a second select pressure passage that communicates between the fluid pressure supply source and the second select pressure chamber; a second select solenoid valve disposed in the
A first shift solenoid valve disposed in a first shift pressure passage that communicates the fluid pressure supply source with the first shift pressure chamber, and a second shift pressure passage that communicates the fluid pressure supply source with the second shift pressure chamber. a second shift solenoid valve disposed in the second shift solenoid valve, and a central control device that controls the supply of current to each of the solenoid valves in response to a signal from a shift lever switch that detects the operation of the shift lever, thereby controlling the gear shifting operation of the transmission. , a control mechanism that is formed independently of the central control device and is activated only when the central control device fails to control the supply of current to each of the solenoid valves; A manually operated switch is provided in the current supply circuit of each solenoid valve and has a movable contact and a plurality of fixed contacts connected to each of the solenoid valves, and the operation of each of the first and second shift solenoid valves and each of the same solenoid valves. a first fixed contact of the manually operated switch connected via each diode provided in a direction that allows only current;
In addition to each of the shift solenoid valves, each of the first and second select solenoid valves and/or one of the above-mentioned manually operated switches are connected via each diode provided in a direction that allows only the operating current of each solenoid valve. a second fixed contact;
A third fixed contact of the manually operated switch is connected to one of the first and second shift solenoid valves through each diode provided in a direction that allows only the operating current of the solenoid valve. A transmission operating device characterized by: