JP2000035127A - Motor-driven select-shift device in synchromesh transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a device, reduce the manufacturing cost of the device, and enhance responsiveness of the device. SOLUTION: A motor-driven select-shift device 10 is made up of a select-shift shaft 11 the rotary motion of which is a select motion and the axial motion of which is a shift motion, a rotary type electic motor 12, a motion converting mechanism 14 for converting a rotary motion transmitted from the electric motor 12 through a reduction gear set 13 into axial motion of the select-shift shaft 11 and an electromagnetic clutch 15 for performing switching between a select motion acting position which restricts a relative rotation between an input side member of the motion converting mechanism 14 and the select-shift shaft 11, and a shift motion acting position which restricts the rotation of the select-shift shaft 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric select / shift device for a synchronous mesh gear transmission used in an automobile.

[0002]

2. Description of the Related Art An electric select / shift device shown in FIG. 3 of Japanese Patent Application Laid-Open No. H10-81158 is provided with a synchronous mesh type gear transmission, and is provided with an optional one of a plurality of shift fork shafts each located at a neutral position. One is selected by an axial movement and the selected shift fork shaft is shifted by a rotational movement, and a first and a second rotary electric motor are arranged in parallel with each other. ing. The output of the first rotary electric motor is reduced by the first worm gear set, and the output of the second rotary electric motor is reduced by the second worm gear set. A first rod is pivotally mounted at an eccentric position of the worm wheel of the first worm gear set, and the rotational movement of the worm wheel of the first worm gear set is converted into an axial movement of the first rod. The axial movement of the first rod is transmitted to an input side member of a lever device supported on the select shift shaft, and the axial movement of the first rod is converted into a rotational movement of the select shift shaft by the lever device. You. Also, the second rod is pivotally mounted at an eccentric position of the worm wheel of the second worm gear set, and the rotational movement of the worm wheel of the second worm gear set is converted into the axial movement of the second rod. The axial movement of the second rod is transmitted to the select shift shaft, and the axial movement of the second rod causes the select shift shaft to move axially.

[0003]

Problems to be Solved by the Invention
The electric select / shift device shown in FIG. 3 of Japanese Patent Publication No. 8 uses two rotary electric motors, and thus has a problem that the size of the device is increased and the manufacturing cost of the device is increased. .

Further, since a worm gear set having low transmission efficiency is used as a reduction gear set for reducing the rotational motion of the output rotary shaft of the rotary electric motor, the rotary electric motor is downsized to improve the responsiveness of the device. There is a problem that it is difficult to make it.

An object of the invention of this application is to provide an electric select / shift device which is small in size and low in manufacturing cost, and further provides an electric select / shift device having high responsiveness.

[0006]

According to a first aspect of the present invention, there is provided an electric select / shift device for a synchronous meshing type gear transmission, wherein a plurality of synchronous selective gearing transmissions are provided at a neutral position. An electric motor having a select shift shaft for selecting any one of the shift fork shafts by a rotary motion, and shifting the selected shift fork shaft by an axial motion, and an output rotary shaft; A motion converting mechanism for converting a rotary motion transmitted from the output rotary shaft of the electric motor via a reduction gear set into an axial motion of the select shift shaft; an input member of the motion converting mechanism and the select shift; A position for a select operation that restricts the relative rotation with respect to the axis, and a position for a shift operation that restricts the rotation of the select / shift axis. A motorized select-shift device in a synchronous meshing type gear transmission which is characterized in that an electromagnetic clutch that is selectively switched between.

According to a second aspect of the present invention, there is provided an electric select / shift device for a synchronous meshing type gear transmission according to the first aspect, wherein the output rotary shaft of the first electric motor is formed hollow. And the first shift shaft is capable of performing axial movement and rotational movement.
Penetrated inside the output rotating shaft of the electric motor,
An electric select / shift device in a synchronous mesh gear transmission, wherein the motion converting mechanism comprises a ball screw mechanism, and the reduction gear set is a planetary gear set.

According to a third aspect of the present invention, there is provided the electric select / shift device in the synchronous meshing type gear transmission according to the first aspect, wherein the electromagnetic clutch is connected to an input side member of the motion conversion mechanism. A fixed solenoid for generating a restraining force for restraining relative rotation with the select shift shaft, and a spring for generating a restraining force for restraining the rotation of the select shift shaft when the solenoid is not excited. An electric select / shift device for a synchronous mesh gear transmission, comprising:

According to a fourth aspect of the present invention, there is provided an electric select / shift apparatus according to the first aspect, wherein the electromagnetic clutch restricts rotation of the select / shift shaft. And a spring for generating a restraining force for restraining relative rotation between the input side member of the motion conversion mechanism and the select shift shaft when the solenoid is not excited. An electric select / shift device for a synchronous mesh gear transmission, comprising:

According to a fifth aspect of the present invention, there is provided the electric select / shift device in the synchronous meshing type gear transmission according to the first aspect, wherein the electromagnetic clutch is connected to an input side member of the motion conversion mechanism. A movable solenoid for generating a restraining force for restraining relative rotation with respect to the select shift shaft, and a spring for generating a restraining force for restraining rotation of the select shift shaft when the solenoid is not excited. An electric shift / select device in a synchronous mesh gear transmission, comprising:

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIG. 1 shows a schematic configuration of a synchronous meshing gear transmission T / M for an automobile having five forward speeds and one reverse speed, and an electric select gearbox according to this application. 10 shows a schematic configuration of a first embodiment 10 of a shift device. The synchronous mesh gear transmission T / M includes a shift fork shaft A1 for shifting between a first forward speed and a second forward speed.
A shift fork shaft A2 for shifting the third forward speed and the fourth forward speed, and a shift fork shaft A3 for shifting the fifth forward speed and the reverse speed. The electric select / shift device 10 is arranged such that the select / shift shaft 11 is parallel to the shift fork shafts A1 to A3 and the left end of the select / shift shaft 11 is located above the right end of the shift fork shaft A2. Is done.

At the left end of the select shift shaft 11, a claw portion 11a extending downward is provided so as to move integrally with the select shift shaft 11. On the other hand, at the right ends of the shift fork shafts A1, A2, and A3, recess forming members A1a, A2a, and A3a that form recesses with which the tips of the claws 11a of the select shift shaft 11 can be engaged, respectively. Shift fork shafts A1, A2 and A
3 so as to move integrally therewith.

FIG. 1 shows a state where the shift fork shafts A1, A2 and A3 are located at the neutral position shown in FIG. 1, and the select shift shaft 11 is located at the neutral position N and the 3-4 shift gate position B. The tip of the claw 11a of the select shift shaft 11 engages with the recess formed by the recess forming member A2a of the shift fork shaft A2, and is formed by the recess forming members A1a, A2a and A3a, respectively. The two recesses are aligned in the direction perpendicular to the axis. Therefore, when the select / shift shaft 11 is rotated from the state of FIG. 1 to the 1-2 shift gate position A in the direction indicated by the arrow,
The tip of the claw 11a comes out of the recess formed by the recess forming member A2a and engages with the recess formed by the recess forming member A1a. Conversely, select shift axis 1
1 is from the state of FIG. 1 in the direction opposite to the direction indicated by the arrow 5
-When the gear is rotated to the R shift gate position C, the claw portion 11a
The tip of the second member escapes from the concave portion formed by the concave portion forming member A2a and engages with the concave portion formed by the concave portion forming member A3a. Thus, any one of the shift fork shafts A1, A2 and A3 located at the neutral position is shifted to the neutral position N
Is selected by the rotational movement of the select / shift shaft 11 located at the position shown in FIG.

When the select shift shaft 11 is moved leftward from the state shown in FIG. 1 to the third forward speed shift position 3, the shift fork shaft A2 is moved leftward by engagement of the claw portion 11a and the recess forming member A2a. , The third forward speed is shifted, and the select shift shaft 1
1 is moved rightward from the state shown in FIG. 1 to the fourth forward gear shift position 4, and the claw 11a and the recess forming member A2a are moved.
, The shift fork shaft A2 is shifted rightward, and the fourth forward speed is shifted. Also,
The select / shift shaft 11 is rotated from the state of FIG.
After the select shift shaft 11 is moved leftward to the first forward speed shift position 1 after the leading end of the a is engaged with the concave portion formed by the concave portion forming member A1a,
The shift fork shaft A1 is shifted leftward by the engagement of the claw portion 11a and the recess forming member A1a to shift the first forward speed, and the select shift shaft 11 is shifted rightward to the second forward speed. When the shift fork shaft 11 is moved to the shift position 2, the shift fork shaft A1 is shifted rightward by the engagement of the claw portion 11a and the concave portion forming member A1a, and the second forward speed is shifted. Further, the select / shift shaft 11 is rotated from the state of FIG. 1 to the 5-R shift gate position C in a direction opposite to the direction indicated by the arrow, and the claw portion 11a is formed.
When the select shift shaft 11 is moved leftward to the fifth forward-gear shift position 5 after the front end of the gear is engaged with the concave portion formed by the concave portion forming member A3a, the claw portion 11a and the concave portion forming member are shifted. A3a causes the shift fork shaft A1 to shift leftward, and
When the shift speed is shifted and the select shift shaft 11 is moved rightward to the reverse shift position shift position R, the shift fork shaft A1 shifts rightward by engagement of the pawl portion 11a and the recess forming member A3a. As a result, the reverse gear is shifted.

The detailed structure of the electric select-shift device 10 is shown in FIG. 2 and FIG. As shown in FIG. 2, the electric select / shift device 10 includes a select / shift shaft 11
An electric motor 12 having an output rotating shaft 12a, and a reduction gear set 13 from the output rotating shaft 12a of the electric motor 12.
The rotary motion transmitted via the
Motion converting mechanism 14 for converting the motion into axial motion, input side member 14a of motion converting mechanism 14 and select shift shaft 11
The main component is an electromagnetic clutch 15 that can be selectively switched between a select operation position that restricts the relative rotation of the select shift shaft and a shift operation position that restricts the rotation of the select shift shaft 11.

The electric motor 12 includes an output rotating shaft 12a,
This is a rotary DC electric motor having an armature 12b, a stator 12c and a brush 12d as main components. The output rotary shaft 12a of the electric motor 12 is supported by bearings 16 and 17 so that it can rotate but cannot move in the axial direction. The output rotary shaft 12a is formed hollow to reduce the inertia and improve the response of the device 10 and to arrange the select shift shaft 11 inside the device to reduce the size of the device 10. I have.

As shown in FIGS. 2 and 3, the reduction gear set 13 is a planetary gear set having high transmission efficiency. That is, the reduction gear set 13 includes an annular sun gear 13a coupled to the right end of the output rotation shaft 12a of the electric motor 12 so as to integrally rotate, a fixed ring gear 13b,
A carrier 13d supporting a plurality of planetary gears 13c meshed with the sun gear 13a and the ring gear 13b;
A sun gear 13e coupled to the carrier 13d so as to rotate integrally therewith; a fixed ring gear 13f;
e and a carrier 13h supporting a plurality of planetary gears 13g meshed with the ring gear 13f. The rotation directions of the carriers 13d and 13h are the same as the rotation direction of the output rotation shaft 12a.

As shown in FIGS. 2 and 3, the motion conversion mechanism 14 is a ball screw mechanism having high transmission efficiency. That is, the motion conversion mechanism 14 is connected to the carrier 13h of the reduction gear set 13 so as to rotate integrally therewith.
4a, the inner peripheral surface of the nut member 14a and the select
And a plurality of balls 14b engaged with a spiral groove formed on the outer periphery of the shift shaft 11.

As shown in FIGS. 2 and 3, the electromagnetic clutch 15 has a disk 15 coupled to a nut member 14a, which is an input side member of the motion conversion mechanism 14, so as to rotate integrally therewith.
a, a movable disk 15b that can move relative to the select shift shaft 11 in the axial direction but is spline-engaged so as to rotate integrally, a fixed disk 15c, and a magnetic member integrally coupled to the disk 15c. A yoke member 15d made of a material, a fixed solenoid 15e disposed in the yoke member 15d, a movable plunger disk 15f made of a magnetic material integrally connected to the disk 15b, and the disk 15b and the plunger disk 15f. And a spring 15g biasing rightward. Solenoid 15
e is excited, an electromagnetic attractive force acts between the yoke member 15d and the plunger disk 15f, and the disk 1
4b, the plunger disk 15f is moved to the left against the spring 15g, and the disk 15b is engaged with the disk 15a as shown in FIG.
The relative rotation between 4a and select shift shaft 11 is restricted. FIG. 4 shows a position for the select operation of the electromagnetic clutch 15, and a restraining force for restraining relative rotation between the nut member 14a and the select shift shaft 11 is generated by a solenoid 15e. When the solenoid 15e is not energized, the disk 15b and the plunger disk 15f
As shown in FIG. 3, the disk 15b is moved rightward by the spring 15g, the disk 15b is engaged with the fixed disk 15c, and the rotation of the select shift shaft 11 is restricted. FIG. 3 shows a shift operation position of the electromagnetic clutch, and a restraining force for restraining the rotation of the select shift shaft 11 is generated by a spring 15g. When the output rotary shaft 12a of the electric motor 12 is rotated clockwise as viewed from the left side in FIG. 1 when the electromagnetic clutch 15 is in the shift operation position in FIG. 4, the select shift shaft 11 is moved rightward in FIG. And the output shaft 1 of the electric motor 12
When 2a is rotated counterclockwise as viewed from the left side of FIG. 1, the select shift shaft 11 moves leftward in FIG.

To shift from the state shown in FIG. 1 to the first forward speed, first, the solenoid 15e of the electromagnetic clutch 15
To set the electromagnetic clutch 15 to the select operation position shown in FIG.
In this state, the electric motor 12 is energized to rotate the output rotation shaft 12a clockwise as viewed from the left side of FIG. Is rotated to the 1-2 shift gate position A, and the claw portion 1 of the select shift shaft 11 is rotated.
1a is formed with a concave forming member A of a shift fork shaft A1.
1a. Next, the solenoid 15e of the electromagnetic clutch 15 is de-energized to switch the electromagnetic clutch 15 to the shift operation position in FIG.
By restricting the rotation of the shift shaft 11, in this state, the direction of energization of the electric motor 12 is switched to the opposite direction, and the output rotation shaft 12a is rotated counterclockwise as viewed from the left side in FIG. After the select shift shaft 11 is moved from the neutral position N to the first forward speed shift position 1, the electric motor 12 is de-energized.

Thereafter, in order to shift up from the first forward speed to the second forward speed, the electric motor 12 is energized to rotate its output rotary shaft 12a clockwise as viewed from the left side in FIG. Thus, the electric motor 12 is de-energized after the select / shift shaft 11 is moved from the first forward speed shift position 1 to the second forward speed shift position 2.

Thereafter, in order to shift up from the second forward speed to the third forward speed, the electric motor 12 is first energized and its output rotary shaft 12a is turned counterclockwise as viewed from the left side in FIG. Select shift shaft 1 by rotating
1 is moved from the second forward speed shift position 2 to the neutral position N, and then the solenoid 15e of the electromagnetic clutch 15 is excited to restrict the relative rotation between the nut member 14a of the motion conversion mechanism 14 and the select shift shaft 11, In this state, by rotating the output rotary shaft 12a of the electric motor 12 counterclockwise as viewed from the left side of FIG. 1, the select shift shaft 11 is rotated to the 3-4 shift gate position B, and the select shift shaft 11 is rotated. Is engaged with the recess of the recess forming member A2a of the shift fork shaft A2. Thereafter, the rotation of the select shift shaft 11 is restricted by deenergizing the solenoid 15e of the electromagnetic clutch 15, and in this state, the output rotation shaft 12a of the electric motor 12 is rotated counterclockwise as viewed from the left side in FIG. Then, after the select / shift shaft 11 is moved from the neutral position N to the third forward speed shift position 3, the electric motor 12 is de-energized.

Thereafter, to shift up from the third forward speed to the fourth forward speed, the electric motor 12 is energized to rotate its output rotary shaft 12a clockwise as viewed from the left side in FIG. Shifts the select / shift shaft 11 from the third forward speed shift position 3 to the fourth forward speed shift position 4
After that, the electric motor 12 is de-energized.

Thereafter, in order to shift up from the fourth forward speed to the fifth forward speed, the electric motor 12 is first energized and its output rotary shaft 12a is turned counterclockwise as viewed from the left side in FIG. Select shift shaft 1 by rotating
1 is moved from the fourth forward gear shift position 4 to the neutral position N, and then the solenoid 15e of the electromagnetic clutch 15 is excited to restrict the relative rotation between the nut member 14a of the motion conversion mechanism 14 and the select shift shaft 11, In this state, the output shaft 12a of the electric motor 12 is rotated counterclockwise as viewed from the left side of FIG. 1 to rotate the select shift shaft 11 to the 5-R shift gate position C, thereby causing the select shift shaft 11 to rotate. Is engaged with the concave portion of the concave portion forming member A3a of the shift fork shaft A3. Thereafter, the rotation of the select shift shaft 11 is restricted by deenergizing the solenoid 15e of the electromagnetic clutch 15, and in this state, the output rotation shaft 12a of the electric motor 12 is rotated counterclockwise as viewed from the left side in FIG. Then, after the select / shift shaft 11 is moved from the neutral position N to the fifth forward speed shift position, the electric motor 12 is de-energized.

To shift from the state shown in FIG. 1 to the reverse gear, first, the solenoid 15e of the electromagnetic clutch 15 is excited to restrict the relative rotation between the nut member 14a of the motion conversion mechanism 14 and the select shift shaft 11. In this state, the output shift shaft 12a of the electric motor 12 is rotated counterclockwise as viewed from the left side of FIG. 1 to rotate the select shift shaft 11 to the 5-R shift gate position C, thereby selecting the shift shaft. The tip of the claw 11a is engaged with the recess of the recess forming member A3a of the shift fork shaft A3. Next, by turning off the solenoid 15e of the electromagnetic clutch 15, the rotation of the select shift shaft 11 is restricted, and in this state, the output rotation shaft 12a of the electric motor 12 is rotated clockwise as viewed from the left side in FIG. Thus, the electric motor 12 is de-energized after the select / shift shaft 11 is moved from the neutral position N to the reverse gear shift position R.

In order to control the operation of the electric motor 12 and the electromagnetic clutch 15, it is necessary to detect the position of the select shift shaft 11 in the axial direction and the position of the select shift shaft 11 in the rotational direction. A sensor 18 (FIG. 2) for detecting the position in the direction and the position in the rotational direction is provided. The electric motor 1
2 is provided with a rotary encoder 19 (FIG. 2) for detecting the rotational position of the output rotary shaft, and estimates the axial position and the rotational position of the select shift shaft 11 from the rotational position of the output rotary shaft of the electric motor 12. And sensor 1
By controlling the operation of the electric motor 12 and the electromagnetic clutch 15 based on the output of the motor 8 and the output of the rotary encoder 19, the accuracy and reliability of the control of the operation of the electric motor 12 and the electromagnetic clutch 15 are improved. .

The electric select-shift device 10 shown in FIGS. 1 to 4 includes a select-shift shaft 11, a rotary electric motor 12, a reduction gear set 13, and a motion conversion mechanism 1.
4 and the electromagnetic clutch 15, it is possible to reduce the size and reduce the manufacturing cost as compared with the electric select-shift device shown in FIG. 3 of JP-A-10-81158. can do.

The output rotary shaft 12a of the electric motor 12
Is hollow, its inertia is small, and the output rotary shaft 1
2, the select / shift shaft 11 is disposed inside, and a reduction gear set composed of a planetary gear set having a high transmission efficiency is employed as the reduction gear set 13, and a ball screw mechanism having a high transmission efficiency is employed as the motion conversion mechanism 14. In addition, the responsiveness of the device 10 can be improved by reducing the size of the electric motor 12, and the size of the device 10 can be reduced.

(Embodiment 2) The electromagnetic latch 15 of the electric select / shift apparatus 10 shown in FIGS. 1 to 4 can be replaced with an electromagnetic clutch 115 shown in FIGS. The electromagnetic clutch 115 includes a disk 115a coupled so as to rotate integrally with a nut member 14a which is an input side member of the motion conversion mechanism 14, and a select shift shaft 1
1. A movable disk 115b made of a magnetic material that can be relatively moved in the axial direction but is spline-engaged so as to rotate integrally.
A fixed yoke member 115c made of a magnetic material; and a fixed solenoid 115 disposed in the yoke member 115c.
d and a spring 115e for urging the disk 115b leftward. When the solenoid 115d is excited, an electromagnetic attractive force acts between the yoke member 115c and the disk 115b, and the disk 115b is moved rightward against the spring 115e as shown in FIG. Are engaged with the yoke member 115c, and the rotation of the select shift shaft 11 is restricted. FIG.
Indicates a shift operation position of the electromagnetic clutch 115, and a restraining force for restraining the rotation of the select shift shaft 11 is generated by a solenoid 115d. Also, the solenoid 11
At the time of non-excitation of 5d, the disk 115b is moved leftward by the spring 115e as shown in FIG.
The disk 115b is engaged with the disk 115a, and the relative rotation between the nut member 14a and the select shift shaft 11 is restricted. FIG. 5 shows a position for the select operation of the electromagnetic clutch 115, and a restraining force for restraining relative rotation between the nut member 14a and the select shift shaft 11 is generated by a spring 115e.

(Embodiment 3) The electromagnetic clutch 15 of the electric select / shift apparatus 10 shown in FIGS.
It can be replaced with the electromagnetic clutch 215 shown in FIGS. This electromagnetic clutch 215 is used for the motion conversion mechanism 1.
The magnetic disk 215a, the magnetic disk 215b, and the fixed disk 215b, which are integrally rotatably coupled to the nut member 14a as the input side member of No. 4, can move relative to the select shift shaft 11 in the axial direction. A movable yoke member 21 made of a magnetic material spline-engaged so as to rotate integrally.
5c, a movable solenoid 215d disposed in the yoke member 215c, and a spring 215e for urging the yoke member 215c rightward. Solenoid 2
15d is excited, an electromagnetic attraction force acts between the yoke member 215c and the disk 115a, and the yoke member 2
8, the yoke member 115c is moved to the left against the spring 215e, the yoke member 115c is engaged with the disk 115a, and the relative rotation between the nut member 14a and the select shift shaft 11 is restricted. Is done. FIG. 8 shows the position for the select operation of the electromagnetic clutch 215, and the restricting force for restricting the rotation of the select shift shaft 11 is the solenoid 2
15d. Also, the solenoid 215d
7, the yoke member 215c is moved rightward by the spring 215e as shown in FIG. 7, the yoke member 215c is engaged with the fixed disk 215b, and the rotation of the select shift shaft 11 is restricted. . FIG.
Indicates a shift operation position of the electromagnetic clutch 215, and a restraining force for restraining the rotation of the select shift shaft 11 is generated by a spring 215e.

[0031]

As described above, the electric select shift of the synchronous mesh gear transmission according to the invention of the present application includes one select shift shaft, one rotary electric motor, Since it is composed of one reduction gear set, one motion conversion mechanism, and one electromagnetic clutch, the size is reduced as compared with the electric select-shift device shown in FIG. 3 of JP-A-10-81158. And the manufacturing cost can be reduced.

Further, the synchronous meshing type gear transmission has a forward 5
The gear stage is the reverse first gear stage.
-4 shift gate and 5-R shift gate,
When shifting from the second forward speed to the third forward speed,
When shifting from the fourth forward speed to the fifth forward speed,
When shifting from the third forward speed to the second forward speed and when shifting from the fifth forward speed to the fourth forward speed, the electromagnetic clutch is excited and de-energized while rotating the electric motor to a specific rotation. Since switching is sufficient, high responsiveness can be obtained.

Further, the output rotary shaft of the electric motor is hollow, the inertia thereof is reduced, the select shift shaft is disposed inside the output rotary shaft, and a reduction gear set comprising a planetary gear set having high transmission efficiency is adopted as the reduction gear set. In addition, since a ball screw mechanism having high transmission efficiency is employed as the motion conversion mechanism, the electric motor can be downsized to improve the responsiveness of the apparatus, and the apparatus can be downsized.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a schematic configuration of a first embodiment of an electric select / shift apparatus and a synchronous meshing type gear transmission according to the present invention;

FIG. 2 is a diagram showing a configuration of an electric select / shift device in FIG. 1;

FIG. 3 is a diagram showing a shift operation position of the electromagnetic clutch in FIG. 2;

FIG. 4 is a view showing a position for a select operation of the electromagnetic clutch in FIG. 2;

FIG. 5 is a diagram showing a position for a select operation of an electromagnetic clutch according to a second embodiment of the electric select / shift apparatus according to the present invention;

FIG. 6 is a diagram showing a shift operation position of an electromagnetic clutch of a second embodiment of the electric select / shift apparatus according to the present invention; FIG.

FIG. 7 is a view showing a shift operation position of an electromagnetic clutch according to a third embodiment of the electric select / shift apparatus according to the present invention;

FIG. 8 is a diagram illustrating a position for a select operation of an electromagnetic clutch according to a third embodiment of the electric select / shift apparatus according to the present invention;

[Explanation of symbols]

 T / M: Synchronous mesh gear transmission A1, A2, A3: Shift fork shaft 10: Electric select / shift device 11: Select / shift shaft 12: Electric motor 12a・ Output rotary shaft 13 ・ ・ ・ Reduction gear set 14 ・ ・ ・ Motion conversion mechanism 15, 115, 215 ・ ・ ・ Electromagnetic clutch

Claims (5)

[Claims] 1. An electric select / shift device for a synchronous mesh gear transmission, comprising: an arbitrary one of a plurality of shift fork shafts provided in the synchronous mesh gear transmission, each of which is located at a neutral position.
A shift shaft for selecting one of the two fork shafts by a rotary motion and shifting the selected shift fork shaft by an axial movement; an electric motor having an output rotary shaft; and a deceleration from the output rotary shaft of the electric motor. A motion converting mechanism for converting a rotational motion transmitted via a gear set into an axial motion of the select shift shaft; and a select operation for restricting relative rotation between an input member of the motion converting mechanism and the select shift shaft. And an electromagnetic clutch selectively switched between a shift position and a shift operation position for restricting the rotation of the select shift shaft. . 2. The electric select / shift device according to claim 1, wherein the output rotation shaft of the first electric motor is formed in a hollow shape, and the select / shift shaft is provided in the transmission. The first electric motor is penetrated inside the output rotation shaft so as to be able to perform axial movement and rotational movement, the motion conversion mechanism is formed of a ball screw mechanism, and the reduction gear set is formed of a planetary gear set. An electric select shift device for a synchronous mesh gear transmission. 3. The electric select / shift device according to claim 1, wherein the electromagnetic clutch is configured to move a relative position between an input member of the motion conversion mechanism and the select / shift shaft. Synchronization characterized by comprising a fixed solenoid for generating a restraining force for restraining rotation, and a spring for generating a restraining force for restraining rotation of the select shift shaft when the solenoid is not excited. An electric select / shift device for a mesh gear transmission. 4. The electric select / shift device according to claim 1, wherein said electromagnetic clutch generates a restraining force for restraining rotation of said select shift shaft. A fixed solenoid,
A synchronous meshing gear transmission comprising: a spring for generating a restraining force for restraining relative rotation between the input side member of the motion conversion mechanism and the select shift shaft when the solenoid is not excited. Electric select and shift device. 5. The electric select / shift device according to claim 1, wherein the electromagnetic clutch is configured to move a relative position between an input member of the motion conversion mechanism and the select / shift shaft. Synchronization characterized by comprising a movable solenoid for generating a restraining force for restraining rotation, and a spring for generating a restraining force for restraining rotation of the select shift shaft when the solenoid is not excited. An electric shift / select device in a mesh gear transmission.