KR20140066296A - Concentric pneumatic gear shift actuator - Google Patents

Abstract

It is an object of the present invention to provide a con- ductive pneumatic gear shifting actuator device capable of reducing costs by using a minimum number of parts by using a combination of a motor type and a pneumatic type, and compacting the same, thereby improving the merchantability.
In order to accomplish the above object, the present invention provides a concentric pneumatic gear shift actuator device, comprising: an air cylinder for generating power in a select direction during gear shifting; A motor for generating power in a shift direction; An actuating shaft connecting the air cylinder and the motor; And an operation finger which is rotatably and slidably moved on the operation shaft and is operated in a select and shift direction by receiving power from an air cylinder and a motor, .

Description

[0001] Concentric pneumatic gear shift actuator [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concentric pneumatic gear shifting actuator device capable of reducing cost and increasing commerciality by using a motor and a pneumatic actuator in combination.

The automatic manual transmission is a system that uses a transmission and a clutch operation actuator in place of the lever and cable in a single plate clutch transmission mounted in a conventional manual transmission vehicle and provides the same operational efficiency and efficiency as a conventional automatic transmission vehicle .

BACKGROUND ART [0002] Automated manual transmissions generally include a clutch composed of one clutch, a transmission gear unit for setting respective gear positions in accordance with the operation of the clutch, a clutch actuator for controlling the clutch, An electronic control unit (ECU) for electronically controlling the clutch actuator and the shift actuator in response to various information of the vehicle and a shift command such as a shift actuator (actuator) for performing shifting by performing selecting and shifting operations ECU).

The gear shift actuator is a motor type in which selection and shifting are performed using the two motors 1 and 2 shown in FIG. 1, and a selector type using a pneumatic cylinder 5 shown in FIG. It can be classified into pneumatic type that applies shifting.

In Fig. 1, reference numerals 3 and 4 denote fingers.

On the other hand, since shift is required in a gear shift, a motor is advantageous because a relatively precise control is required, and a select is required to have a lower precision than a shift, so that it can have sufficient quality by pneumatic control.

However, in the case of conventional transmission actuators, there is a tendency to perform shifting and selecting in a motorized type, pneumatic type, and pneumatic type in a unified manner, and a force required for shifting and selecting Since different motors and pneumatic cylinders are required to be developed separately for each force, the development cost is increased and there is a disadvantage in terms of layout in consideration of the mountability of the vehicle.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a concentric pneumatic gear shifting actuator device capable of reducing costs by using a minimum number of parts by using a motor type and a pneumatic type, The purpose is to provide.

In order to accomplish the above object, the present invention provides a concentric pneumatic gear shift actuator device, comprising: an air cylinder for generating power in a select direction during gear shifting; A motor for generating power in a shift direction; An actuating shaft connecting the air cylinder and the motor; And an operation finger which is rotatably and slidably moved on the operation shaft and is operated in a select and shift direction by receiving power from an air cylinder and a motor, .

The operation finger is composed of a ring-shaped finger body and a protruding portion protruding in the radial direction from the finger body. The finger body is penetratively coupled by the operation shaft to receive a rotational force, and the piston of the air cylinder And is slidable on the operation shaft.

Wherein the actuating finger comprises a ball-shaped detent provided in the finger body so as to be capable of being inserted into and out of the finger body, and a spring for elastically supporting the detent, wherein when the actuating finger slides in the selecting direction (axial direction) So that the neutral position can be recognized in such a manner as to be inserted into the neutral groove formed on the base.

The operation shaft has a stopper protruded radially at one side thereof and is capable of limiting a maximum movement distance of the operation finger as the operation finger hits the stopper.

Advantages of the concentric pneumatic gear shifting actuator device according to the present invention will be described below.

In the case of a shift that requires relatively precise control when shifting gears in an automatic manual transmission (AMT), the motor is used, and in the case of select that does not require relatively precise control, the motor- The cost can be reduced and the layout can be made compact, thereby improving the merchantability.

1 is a view showing a motor-type shift actuator according to the prior art;
2 is a view showing a conventional pneumatic transmission actuator
FIG. 3 is a block diagram of an entire system according to the present invention.
4 is a perspective view of a concentric pneumatic gear shifting actuator device according to the present invention;
Figs. 5A and 5B are cross-sectional views showing the operating state of Fig. 4
6 is a flowchart for explaining a control method of the con- ductive pneumatic gear shift actuator apparatus according to the present invention

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

4 is a perspective view of a con- ductive pneumatic gear shifting actuator device according to the present invention, and Figs. 5A and 5B are sectional views showing the operating state of Fig. 4. Fig.

The present invention relates to a concentric pneumatic gear shifting actuator device capable of reducing cost and constituting at least a part by using a combination of a motor type and a pneumatic type.

To this end, the pneumatic and pneumatic gear shifting actuator device using the motor according to the present invention includes a pneumatic source 10 for generating air pressure, an air control valve unit 14 for controlling the air cylinder by using air pressure, A shift motor 20 for applying a shift operation using electricity, and an air cylinder and a shift motor 20 which receive a signal from the pressure sensor 12, And a TCU 15 (Transmission Control Unit) for controlling the TCU 15.

A concentric pneumatic gear shifting actuator device according to an embodiment of the present invention includes an air cylinder for providing power for performing a selection, a motor 20 for providing power for performing a shift, an air cylinder 20 and a motor 20 And an operation finger 19 which is mounted on the operation shaft 21 in a rotatable and slidable manner.

The air cylinder is constituted of a cylinder body 13a having an air hole to provide power to the left and right straight lines of the select and a piston 13b to be inserted and withdrawn from the cylinder body 13a.

The cylinder body 13a has air holes at both ends and allows the air pressure to be introduced through the air holes to advance and retract the piston 13b.

At this time, the air pressure is supplied from the pneumatic source 10, is kept below the permissible pressure on the circuit by the pressure relief valve 11, and can be detected by the pressure sensor 12 have.

The air cylinder is controlled by the air control valve unit 14 for forward or backward operation and the air control valve unit 14 can receive the control signal from the TCU 15 to control the forward and backward movement of the air cylinder.

The air cylinder has a PLCD sensor 23 mounted on the cylinder body 13a for measuring the protruding length of the piston 13b (forward and backward distance of the cylinder), and the PLCD sensor 23 has a cylinder body 13a, And a stroke rod 23b provided so as to be able to enter and exit from the sensor main body 23a.

The end of the stroke rod 23b is connected to one side of the outer circumferential surface of the piston 13b by a plate and the stroke rod 23b is interlocked with the movement of the piston 13b.

The PLCD sensor 23 measures the moving distance of the stroke rod 23b protruding simultaneously with the advancement of the piston 13b.

Here, since the operation principle of the PLCD sensor 23 is well known in the art, a detailed description will be omitted.

The motor 20 is a BLDC motor 20 having an operation shaft 21 which is capable of forward rotation and reverse rotation and which projects from the output side of the motor 20 and rotates. When the motor 20 is operated, ) To transmit the rotational force.

The motor 20 has an internal Hall sensor for detecting the rotation angle of the motor 20. [

In addition, a pair of neutral grooves 21a are formed in the operating shaft 21 at intervals, and the neutral position of the shift lever can be detected at the time of selection.

The stopper 22 is larger in diameter than the shaft diameter in the radial direction on the operation shaft 21 so that the maximum movement distance of the operation finger 19 when the operation finger 19 is operated in the select direction .

The operating finger 19 is selectively engaged with the shift rail at the upper end of the transmission in such a manner that it slides and rotates in the select and shift directions to thereby effect gear shifting.

The operation finger 19 includes a finger body 19a having a circular ring shape and a projection 19b projecting from the outer circumferential surface of the finger body 19a, Is substantially engaged with the shift rail.

The operating finger 19 is fixed and fixed in such a manner that it is sandwiched between the piston 13b and the jig 17 so that the operating shaft 21 is inserted into the hexagonal hole formed in the inside of the finger body 19a Not only the operating finger 19 is slidable left and right on the operating shaft 21 but also is rotatable by the operating shaft 21. [

At this time, the end of the operating shaft 21 protruding from the motor 20 is inserted into the piston 13b through the jig 17 and the operating finger 19, and inserted into the piston 13b And can be rotatably supported by bearings.

The jig 17 is a component for securing the actuating finger 19 to the piston 13b and sliding it together with the piston 13b.

The jig 17 is fixed to the piston 13b by a bolt 18 at a distance from the end surface of the piston 13b and the distance between the jig 17 and the piston 13b is similar to the thickness of the finger body 19a.

In order to fix the piston 13b and the jig 17 in the rotational direction, bearings are inserted into both side surfaces of the finger body 19a so that when the operation finger 19 rotates in the shift direction, The jig 17 is fixed.

A detent 24 in the form of a ball is provided in the finger body 19a and a spring 25 is embedded in the finger body 19a so that the inner surface of the finger body 19a The detent 24 is inserted into the finger body 19a by the spring 25 and the neutral groove 21a at the neutral position when sliding in the select direction The detent 24 protrudes into the neutral groove 21a due to the resilient restoring force of the spring 25 and is slightly caught to find the neutral position.

A control method of the concentric pneumatic gear shifting actuator apparatus according to the present invention will now be described.

6 is a flowchart for explaining a control method of the con- ductive pneumatic gear shift actuator apparatus according to the present invention.

The TCU 15 receives a sensing signal from the hall sensor of the motor 20 and the PLCD sensor 23 (distance sensor) of the air cylinder 13 to confirm the position of the actuating finger 19. [ This allows the position of the current gear to be checked.

Then, when a shift request signal is input to the TCU 15 due to the operation of the shift lever of the driver or the like, the TCU 15 provides power in the select and shift directions for shifting.

Here, it is determined whether or not a target gear command is received from the TCU 15.

Subsequently, upon receipt of the target gear command from the TCU 15, it is determined whether or not the target gear is the same as the present gear.

Subsequently, when the target gear coincides with the current gear, the position of the current operating finger 19 is checked again, and when the target gear does not coincide with the current gear, the clutch is disengaged.

Thereafter, whether or not the positions of the target operating fingers 19 and the current operating fingers 19 are the same for operating the operating fingers 19 simultaneously in the select direction and / or the shift direction are determined in the select and shift directions, respectively .

In the case of a shift, if the target position and the current position are different from each other, the shift motor 20 is controlled to angle-control the operation finger 19 in the shift direction (rotational direction).

At this time, when the motor 20 is operated, the operation shaft 21 is rotated and the operation finger 19 connected to the operation shaft 21 is rotated.

Then, the current position is confirmed using the hall sensor.

Then, it is determined whether or not the target position and the current position are the same.

Subsequently, when the target position is the same as the current position, the shift change is completed.

In the case of the select, if the target position and the current position are different from each other, the air cylinder 13 is controlled through the air control valve unit 14 to slide the operation finger 19 in the select direction (slide direction).

At this time, when the air cylinder is operated, the piston 13b moves and the actuating finger 19 connected to the piston 13b moves in the axial direction.

Then, the stroke PLCD sensor 23 confirms the current position.

Then, it is determined whether or not the target position is the same as the current position.

Subsequently, when the target position is the same as the current position, the shift change is completed.

When the shift and the selection are completed as described above, this signal is confirmed.

After this, gear shifting is completed.

Then, it is determined whether or not the target gear and the current gear are the same.

If the target gear and the current gear are the same, the clutch is connected and the control is ended.

Therefore, according to the present invention, the motor 20 is used in the case of a shift requiring comparatively precise control in gear shifting in an automatic manual transmission (AMT), and in the case of a selection in which relatively precise control is not required, By using the motor type and the pneumatic type in combination, it is possible to reduce the cost by using the minimum number of parts and to make the layout compact, thereby improving the merchantability.

10: Pneumatic source
11: Pressure relief valve
12: Pressure sensor
13: Air cylinder
13a:
13b: piston
14: Air control valve unit
15: TCU
17: Jig
18: Bolt
19: working fingers
19a: Finger body
19b:
20: Motor
21: Operation axis
21a: Neutral groove
22: Stopper
23: PLCD sensor (stroke sensor)
23a:
23b: stroke load
24: Detent
25: spring

Claims (4)

An air cylinder (13) for generating power in the select direction at the time of gear shifting;
A motor (20) for generating power in a shift direction;
An actuating shaft 21 connecting the air cylinder 13 and the motor 20; And
A working finger 19 which is rotatably and slidably moved on the operating shaft 21 and is actuated in a select and shift direction by receiving power from the air cylinder 13 and the motor 20;
, And a gear shift can be made by using the motor (20) and air pressure in combination.
The method according to claim 1,
The operation finger 19 is composed of a ring body 19a and a projection 19b protruding radially from the finger body 19a. The finger body 19a is connected to the operation shaft 21 , And is rotatable by the jig (17) on the piston (13b) of the air cylinder and is slidable on the operating shaft (21).
The method according to claim 1,
The actuating finger is composed of a ball-shaped detent 24 provided in the finger body 19a so as to be in and out of the finger body 19a and a spring 25 for elastically supporting the detent 24, (24) is inserted into the neutral groove (21a) formed on the operating shaft (21) when sliding in the axial direction (axial direction), so that the neutral position can be recognized .
The method according to claim 1,
The operating shaft 21 has a stopper 22 protruding radially on one side of the operating shaft 21 so as to limit the maximum moving distance of the operating finger 19 as the operating finger 19 hits the stopper 22 Wherein the actuator is a pneumatic actuator.

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