JPS591852A - Speed changing device for use in transmission gear - Google Patents

Abstract

PURPOSE:To simplify a speed change operation and lighten fatigue of a driver by shifting a gear shift fork by a fluid actuator switched by a solenoid valve. CONSTITUTION:In a switch box, when a shift lever is shifted to a neutral switch 45(N) and a main switch is turned on, an electric circuit 36 is closed. Subsequently, the shift lever is shifted from a neutral switch 45(N) to a speed change switch 39 (first speed), and when the speed change switch 39 is closed, a solenoid valve 29 is opened so that compressed air is supplied from an air tank 26 to an air cylinder 20 through an air pressure pipeline 27. In this arrangement, a gear shift fork 16 is shifted with a gear shift 12 so as to change a transmission gear 50 to the first speed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transmission that is mounted on a vehicle, such as an automobile, and used as a transmission, and particularly relates to a transmission that uses a fluid pressure actuator to operate the transmission.

Today, one of the difficulties for drivers when driving a car is operating the gear shift and select lever, which does not mesh properly. Automatic transmissions have been developed and put into practical use in order to reduce mental and mental fatigue.

However, the automatic transmission mainly uses a fluid coupling or a torque converter and a planetary transmission.
Although it is possible to shift speeds quickly and smoothly since the gears are shifted using hydraulic pressure instead of in combination with gears, the performance of the engine is reduced by the efficiency of the fluid coupling and torque converter. , that is,
This method is insufficient in terms of improved performance through transmissions and economic efficiency in terms of fuel efficiency, has problems with lifespan and durability, and tends to be expensive to manufacture.

The purpose of this invention is to provide gear shift and gear meshing in the operation of a vehicle equipped with a gear transmission.
It simplifies the operation of the select lever, reduces driver physical and mental fatigue, enables quick and smooth shifting, and improves engine performance compared to vehicles equipped with automatic transmissions. This is a transmission system used in vehicle transmissions that prevents a decline in fuel efficiency, improves lifespan and durability, simplifies the mechanism without increasing the size, and enables manufacturing at low cost. On offer.

In order to overcome these problems, the present invention has an electro-hydraulic configuration, that is, an input shaft, a countershaft, an output shaft, and a number of gears that enable the input shaft, countershaft, and output shaft to mesh with each other. In a transmission consisting of a plurality of gear shift forks held on a shaft, a plurality of fluid pressure actuators that shift the gear shift forks,
A transmission device used in a transmission includes a plurality of solenoid valves disposed in a fluid pressure circuit of the fluid pressure actuator, and a speed change switch that selectively opens and closes the solenoid valves.

Hereinafter, preferred specific examples of the transmission used in the transmission according to the present invention will be described with reference to the drawings.

The figure shows a specific example 10 of the transmission of the present invention applied to a truck transmission, that is, a gear box 50 configured in a synchronous mesh type with six forward speeds (1-6) and one reverse speed (R). The transmission is, of course, of the usual configuration, namely an input shaft, an output shaft, and a subshaft, and a number of gears that enable the input shaft, output shaft, and subshaft to mesh with each other. It is made up of gears, etc.

The transmission 10 includes a plurality of gear shift shafts 11, 12, 1 arranged in the transmission 50.
3. Multiple gear shift forks held in 14
5, 16, 17, 18 and a plurality of hydraulic actuators 19.20, 21, 22, 23, 24.
25 and its fluid pressure actuators 19 , 20 , .
.
33.34 and those solenoid valves 28, 29. ..., 3
A main switch 37 .located in the electrical circuit 36 connecting 4 to the power source 35 . Speed change switch 38, 39, 40°41.4
2, 43, 44, and a neutral switch 45 (to), the shift switch 38 is a rearward transmission switch (R) for reverse gear, and the shift switch 39, 40 is
, 41, 42, 43, and 44 are the switches for the first to sixth speeds.

The gear shift shirts) 11, 12, 13, and 14 are for reverse, 1st and 2nd gears, 3rd and 4th gears, and 5th and 6th gears; 50 case cover 51.

Multiple gear shift forks 15,16°17.18
is the case of the transmission 50 (not shown)
In the corresponding gear shift shaft 11,1
2, 13, and 14, respectively, by sliding the coupling sleeve on the output shaft spline and meshing the output shaft gear idling on the output shaft with the output shaft, 70 Lobera Shirt 1, (not shown). Its function is to transmit the power of the diesel engine to the engine.

A plurality of fluid pressure actuators 19, 20. ....

25 is configured as an A single-acting type air cylinder, and for reversing the transmission 50 and the J5th to 6th gears,
Corresponding gear shift shaft 11.12, 13.1
It is connected to the shaft end of 4.

As such, air cylinders 19, 20 . ....

25 is gear shift shirt) 11, 12, 13゜14
It functions as a bearing for the nozzle, and is placed in the case cover 51 at a predetermined position.

Those air cylinders 19, 20. . . , 25 is, of course, a cylinder fixed to the case cover 51,
a piston fitted into the cylinder so as to be able to reciprocate and slide; and an operating rod having one end connected to the piston and the other end connected to the shaft ends of the gear shift shafts 11, 12, 13, and 14, respectively; It is composed of a spring that gives return motion to the piston, and a cylinder chamber formed in the cylinder in cooperation with the piston is connected to a fluid pressure source 26 via a fluid pressure circuit 27.

The other end of the gear shift shaft 11 to which the backward air cylinder 19 is connected is held by a bearing 52 disposed on the case cover 51.

Also, these air cylinders 19, 20 . ....

In 25, the operation Rondo is gear shift / Yaft i
x, t2. Of course, it is also possible to integrate the air cylinders 19, 20, .
Shift Nyang l-11.

12, 13, and 14, the other end is held by a bearing 52 disposed on the case cover 51.

The fluid pressure source 26 is a pneumatic source, and is comprised of a compressor and an air tank driven by an engine mounted on the truck.

Air cylinders 19, 20°... are connected to the air pressure source 26.
, 25 arranged in the fluid pressure circuit 27.
8,29. ..., 34 is configured as a three-way control valve,
Reverse switch 38 and speed change switch 39.40.・・・
, 44 are open, the air cylinders 19,
20. ..., 25 cylinder chambers are connected to the atmosphere.

Those solenoid valves 28, 29. . . , 34 are assembled as a control valve unit, bolted onto the case cover 51, and connected to the air cylinder 19.2 in its hydraulic circuit, ie, the pneumatic piping 27.
0. . . , 25 and the solenoid valves 28, 29, . . . , 34 are shortened to prevent time delays.

Reverse switch 38 (R), speed change switch 39°40,
. . , 44, and neutral switch 45 (N) are incorporated in a switch box (not shown), and the reverse switch 38 and the shift switch 39, 40 . ...
, 44 are arranged within the switch box to be opened and closed by a shift lever (not shown). Of course, the switch box is placed on the floor to facilitate the shifting operation of the shift lever. Also, the shift lever is detented.
A device (not shown) holds the switch shifted.

Next, the transmission mechanism 10 of the present invention configured as described above.
Explain the operation.

First, in the switch box, with the shift lever shifted to the neutral switch 45 (N): turn on the main switch 37;
When the electric circuit 36 is closed, the shift lever is shifted from the neutral switch 45 (N) to the speed change switch 39, the speed change switch 39 is closed, the solenoid valve 29 is opened, and the pneumatic pipe 27 is closed. The air tank 26 also supplies compressed air to the air cylinder 20 via the air tank 26, which shifts the gear shift fork 16 together with the gear soft shaft 12, and the transmission 50 is shifted to the first speed.

Next, if the shift lever is moved 7 feet from the speed change switch 39 to the speed change switch 40, the speed change switch 39
is opened and the shift switch 40 is closed.

When the speed change switch 39, 40 is operated in this way, the solenoid valve 29 is closed, the compressed air in the air cylinder 20 is discharged from the solenoid valve 29 to the atmosphere, and the solenoid valve 30 is opened. Compressed air is supplied from the air tank 26 to the air cylinder 21 via the pneumatic line 27, and the gear shift fork 16 is shifted together with the gear shift shaft 12 by the air cylinder 21, and the gear shift fork 16 is shifted together with the gear shift shaft 12. is shifted from first speed to second speed.

In this way, this transmission device 10 allows the transmission 50 to change gears by operating a shift lever.

Based on the above, if we compare the transmission mechanisms of gear transmissions and automatic transmissions that have already been proposed and used,
The transmission of the present invention includes a plurality of fluid pressure actuators arranged in the transmission to shift a plurality of gear shift forks, a plurality of solenoid valves arranged in a fluid pressure circuit of the fluid pressure actuators, and , and a speed change switch that selectively opens and closes these electromagnetic valves, the transmission used in the transmission of the present invention is equipped with a speed change switch that selectively opens and closes these solenoid valves. Shifting operations are much easier than operating a gear shift and select lever, reducing physical and mental fatigue for the driver, and enabling quick and smooth shifting.
It is possible to fully demonstrate engine performance compared to vehicles equipped with automatic transmissions, prevent deterioration in fuel efficiency, prevent deterioration in transmission life and durability, and without increasing the size of the vehicle. The mechanism is simplified and can be manufactured at low cost, making it more practical.

As mentioned above, from the specific examples of this invention that have been described with reference to the drawings, various modifications and changes will be easily made by those who have ordinary knowledge in the technical field to which this invention pertains. Furthermore, the configuration of this invention can be easily replaced with an embodiment essentially the same as this invention that satisfies essentially the same problems as this invention and achieves the same effects as this invention. I guess it will happen.

[Brief explanation of the drawing]

The figure is a schematic diagram of a transmission of the present invention applied to a truck transmission, that is, a gear transmission. 10... Transmission device, 11, 12, 13, 14... Gear shift shaft, 15, 16, 17. 18...
Gear shift fork, 19, 20, 21° 22.2
3, 24.25...Fluid pressure actuator, 28.2
9, 30, 31, 32, 33. 34... Solenoid valve, 37
...Main switch, 38 river reverse switch, 39.40,
41, 42.4'3.44... 1st to 6th speed shift switch, 5o... Transmission 0

Claims (1)

[Claims] An input shaft, a sub-shaft, an output shaft, and the input shafts. Multiple gears, such as multiple gears that allow the countershaft and output shaft to mesh
A plurality of gear shift forks held on a shift shaft, a plurality of fluid pressure actuators that shift the gear shift forks, and a plurality of solenoid valves arranged in a fluid pressure circuit of the fluid pressure actuators. , a speed change device used in a transmission, including a speed change switch that selectively opens and closes those solenoid valves.