JP2014052026A - Electric actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric actuator simply constructed to actualize smooth axial movement of a shift select shaft.SOLUTION: A shift conversion mechanism 11 includes a screw shaft 29 (a supporting shaft) to be rotationally driven by an electric motor, and a ball nut 30 (a movable body) to be moved in a second axial direction X2 of the screw shaft 29. A connection mechanism 52 for connecting a connection arm 32 connected to the ball nut 30 to a shift select shaft 3 includes a connection groove 63 inserted through the shift select shaft 3 in a first radial direction R1 and extending in a first axial direction X1 of the shift select shaft 3, and a connection pin 64 fixed to a second connection part 53 of the connection arm 32 via a bush 60. The connection groove 63 has a first inner wall 67 and a second inner wall 68 opposing each other in a second radial direction R2 perpendicular to the first radial direction R1. A space between the first inner wall 67 and the second inner wall 68 is larger than the diameter of the connection pin 64.

Description

  The present invention relates to an electric actuator.

2. Description of the Related Art Conventionally, a transmission device of an automatically controlled manual transmission (Automated Manual Transmission) in which a shift of a manual transmission is automated is known. Such a transmission device is provided with an electric actuator that operates a shift lever to switch the gear position of the transmission mechanism.
For example, in Patent Document 1, an electric actuator that alternatively executes a case where the shift select shaft is rotated about its central axis for the shift operation and a case where the shift select shaft is moved in the axial direction for the select operation. Is used.

  Specifically, during a shift operation, the screw shaft of the ball screw mechanism having a 90 ° stagger angle with respect to the shift select shaft is rotated by an electric motor, and the ball nut of the ball screw mechanism is moved in the axial direction of the screw shaft. Move. Due to the axial movement of the ball nut, the connecting arm that connects the ball nut and the shift select shaft is swung, and the shift select shaft is rotated via the connecting arm.

  On the other hand, at the time of a select operation, a pinion that meshes with a rack formed on the shift select shaft is rotated by an electric motor to move the shift select shaft in the axial direction. One end of the connecting arm is spline-fitted to the shift select shaft, and one end of the connecting arm moves in the axial direction with respect to the shift select shaft during a selection operation.

JP 2012-97803 A

  In Patent Document 1, in order to prevent the connecting arm connected to the ball nut from falling down and causing a twist on the shift select shaft during a select operation, the connecting arm is connected to the shift select shaft. Restriction means for restricting to an orthogonal posture is provided. As the restricting means, a pair of annular members are provided that sandwich the end of the connecting arm from both sides while surrounding the shift select shaft. However, there is a problem that the structure becomes complicated.

  Accordingly, an object of the present invention is to provide an electric actuator that has a simple structure and can realize a smooth axial movement of a shift select shaft.

  In order to achieve the above object, the first aspect of the present invention is to rotate the shift select shaft (3; 3P) for a shift operation and to use the shift select shaft as an axial direction for the select operation. An electric actuator (1; 1P) to be moved to (X1), which is an electric motor (10) and a select conversion mechanism for converting the output rotation of the electric motor into movement of the shift select shaft in the first axis direction (12), and a support shaft (29) having a staggered shaft relationship with respect to the shift select shaft, and is driven by the electric motor to move in a second axial direction (X2) as an axial direction of the support shaft. A movable body (30), a first coupling portion (51; 51P, 51Q) coupled to the movable body, and a first coupling section (52; 52P, 52Q) coupled to the shift select shaft. A shift conversion mechanism (11; 11P) for converting an output rotation of the electric motor into a rotation of the shift select shaft, and a connection arm (32; 32P, 32Q) having a connection portion (53; 53P, 53Q). The coupling mechanism extends in the first axial direction through the shift select shaft in the first radial direction (R1), and is in a second radial direction (R2) perpendicular to the first radial direction. A connecting groove (63; 63P, 63Q) having a first inner wall (67; 67P, 67Q) and a second inner wall (68; 68P, 68Q) facing each other, and being fixed to the connecting arm and free to play in the connecting groove And a connecting pin (64; 64P, 64Q) that allows movement of the shift select shaft in the first axis direction during a select operation, and includes the first inner wall and the second inner wall, Interval (L1) is To provide an electric actuator which is larger than the connecting pin diameter (D1).

In addition, although the alphanumeric character in a parenthesis represents the corresponding component etc. in embodiment mentioned later, this does not mean that this invention should be limited to those embodiment as a matter of course. The same applies hereinafter.
According to a second aspect of the present invention, when the shifting operation is performed, the connecting pin is inclined with respect to the first radial direction, and two points are provided on the first inner wall and the second inner wall at both end positions in the first radial direction. You may be comprised so that it may contact.

According to a third aspect of the present invention, the connection mechanism includes a bush (60; 60P, 60Q) fixed to the connection arm and slidably fitted to the outer periphery of the shift select shaft. You may fix to the fixing hole (61, 62) provided in the said bush.
According to a fourth aspect of the present invention, the support shaft includes a screw shaft (29) that is rotationally driven by the electric motor, and the moving body is a ball nut (30) screwed to the screw shaft via a ball. ) May be included.

  According to the first aspect of the present invention, the distance between the first inner wall and the second inner wall of the connecting groove of the shift select shaft is made larger than the diameter of the connecting pin. The shift select shaft can be smoothly moved in the axial direction without causing twisting. Even without using the regulating means as in Patent Document 1, it is possible to realize a smooth axial movement of the shift select shaft with a simple structure.

According to the second aspect of the present invention, the connecting pin tilts with respect to the first radial direction of the shift select shaft during the shift operation, and 2 is provided between the first inner wall and the second inner wall at both end positions in the first radial direction. By making point contact, the rotation of the connecting arm can be transmitted to the shift select shaft.
According to the invention of claim 3, since the shift select shaft can move smoothly in the first axial direction with respect to the bush to which the connecting pin is fixed during the select operation, there is no possibility that the connecting pin and the connecting groove are twisted. .

  According to the fourth aspect of the present invention, the ball nut can be smoothly moved in the axial direction (second axial direction) of the screw shaft by rotating the screw shaft.

1 is a schematic perspective view showing a schematic configuration of an electric actuator and a speed change operation mechanism according to an embodiment of the present invention. It is sectional drawing of the electric actuator of FIG. It is sectional drawing of the electric actuator cut | disconnected along the III-III line | wire of FIG. It is a disassembled perspective view of a connection arm, a shift select shaft, and a connection mechanism. It is sectional drawing of a connection mechanism and its periphery. It is a partially broken schematic side view of the shift conversion mechanism, and shows a state during a select operation. It is a partial fracture outline side view of a shift conversion mechanism, and has shown the state at the time of shift operation. It is sectional drawing of the principal part of the electric actuator of another embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic perspective view schematically showing an electric actuator 1 according to an embodiment of the present invention and a shift operation mechanism 2 that is driven by the electric actuator 1 and operates a transmission (not shown).
The shift operation mechanism 2 includes a shift select shaft 3 for selectively causing the transmission to perform a shift operation and a select operation, an internal lever 4 fixed to the shift select shaft 3, and a plurality of fork shafts extending in parallel with each other. 5A, 5B, 5C, and fork heads 7A, 7B, which are formed in the middle portions of the respective fork shafts 5A, 5B, 5C and formed with engaging recesses 6A, 6B, 6C, respectively, with which the internal lever 4 can be engaged. 7C and a shift fork 8 fixed to each of the fork shafts 5A, 5B and 5C (only the shift fork 8 fixed to the fork shaft 5A is shown in FIG. 1).

The electric actuator 1 has a function of moving the shift select shaft 3 in the first axial direction X1 as an axial direction for the select operation, and a rotational direction Y around the central axis 9 for the shift operation. It has a function to rotate.
The internal lever 4 has one end 4a fixed to the shift select shaft 3 and the other end 4b engageable with each of the engagement recesses 6A, 6B, 6C. The internal lever 4 moves integrally with the shift select shaft 3 in the first axial direction X1, and rotates integrally with the shift select shaft 3 in the rotational direction Y.

When the internal lever 4 moves in parallel with the first axial direction X1 as the shift select shaft 3 is moved in the first axial direction X1 by the electric actuator 1, the other end 4b of the internal lever 4 is connected to the required fork. Engage with the head 7A, 7B or 7C, thereby achieving the select operation.
When the internal lever 4 rotates in the rotational direction Y along with the rotation of the shift select shaft 3 in the rotational direction Y by the electric actuator 1, together with the fork heads 7A, 7B or 7C with which the internal lever 4 is engaged. The fork shaft 5A, 5B or 5C provided with the fork head 7A, 7B or 7C moves in the axial direction MA, MB or MC. Thereby, the shift operation is executed.

  FIG. 2 is a cross-sectional view of the electric actuator 1. Referring to FIG. 2, the electric actuator 1 includes an electric motor 10, a shift conversion mechanism 11 that converts the output rotation of the electric motor 10 into the rotation of the shift select shaft 3, and the output rotation of the electric motor 10 as the shift select shaft 3. A selection conversion mechanism 12 for converting the movement into the axial direction of the motor, a switching unit 13 for switching between a state in which the electric motor 10 and the shift conversion mechanism 11 are drivingly connected, and a state in which the electric motor 10 and the selection conversion mechanism 12 are drivingly connected. It has.

The electric motor 10 includes a motor housing 10a and a rotating shaft 10b. The shift conversion mechanism 11, the select conversion mechanism 12, and the switching unit 13 are accommodated in the housing 14. The motor housing 10a and the housing 14 are fixed to each other.
The switching unit 13 includes an input shaft 15 that is coaxially coupled to the rotary shaft 10 b of the electric motor 10 so as to be integrally rotatable, and a disk-shaped input rotor 16 that is provided at one end of the input shaft 15 and rotates integrally with the input shaft 15. An annular first output rotor 17 facing the first surface 16a of the input rotor 16 and connected to a screw shaft 29 as an input member (to be described later) of the shift conversion mechanism 11 so as to be integrally rotatable, and a first of the input rotor 16 An annular second output rotor 18 facing the two surfaces 16b and connected to a first gear 36 as an input member (described later) of the select conversion mechanism 12 so as to be integrally rotatable is provided.

The switching unit 13 includes a first electromagnetic clutch 19 that switches between a state in which the input rotor 16 and the first output rotor 17 are connected so as to transmit torque and a state in which the connection is cut off, and the input rotor 16 and the second output rotor 18. And a second electromagnetic clutch 20 that switches between a state in which torque transmission is possible and a state in which the connection is cut off.
The first electromagnetic clutch 19 includes a first armature 21 provided on the first surface 16 a of the input rotor 16, and a first field 23 that is fixed to the housing 14 and accommodates the first electromagnetic coil 22. The second electromagnetic clutch 20 includes a second armature 24 provided on the second surface 16 b of the input rotor 16, and a second field 26 that is fixed to the housing 14 and accommodates the second electromagnetic coil 25.

When the first electromagnetic coil 22 is excited while the excitation of the second electromagnetic coil 25 is released, the first armature 21 is deformed toward the first field 23 due to the electromagnetic attractive force generated in the first field 23. As a result, the input rotor 16 and the first output rotor 17 are frictionally coupled. Thereby, the rotational driving force of the electric motor 10 is transmitted to the shift conversion mechanism 11.
When the second electromagnetic coil 25 is excited in a state where the excitation of the first electromagnetic coil 22 is released, the second armature 24 is deformed toward the second field 26 by the electromagnetic attractive force generated in the second field 26. As a result, the input rotor 16 and the second output rotor 18 are frictionally coupled. Thereby, the rotational driving force of the electric motor 10 is transmitted to the select conversion mechanism 12.

  When the shift knob 91 is operated, an ECU (Electronic Control Unit) that receives the operation signal excites one of the first electromagnetic coil 22 and the second electromagnetic coil 25 via a drive circuit (not shown). At the same time, the electric motor 10 is driven via a drive circuit (not shown), thereby causing the electric actuator 1 to execute a required shift operation or select operation.

  The shift conversion mechanism 11 includes a screw shaft 29 as a support shaft rotatably supported by the housing 14 via bearings 27 and 28 and immovable in the second axial direction X2 as an axial direction, and a ball on the screw shaft 29. And a ball nut 30 as a moving body screwed through (not shown), and the rotational motion input from the first output rotor 17 to the screw shaft 29 is the linear motion of the ball nut 30 (second axial direction X2). And a connecting arm 32 that connects the ball nut 30 and the shift select shaft 3 to each other.

The screw shaft 29 of the ball screw mechanism 31 is in a relationship of a misalignment axis with a misalignment angle of 90 ° with respect to the shift select shaft 3. One end of the screw shaft 29 is press-fitted into the center hole of the first output rotor 17.
The select conversion mechanism 12 includes a pinion shaft 35 supported in parallel with the input shaft 15 via bearings 33 and 34 by a housing 14, a first gear 36 that is provided so as to be integrally rotatable with the second output rotor 18, and a first gear 36. A transmission mechanism 38 that includes a second gear 37 that meshes with the gear 36 and transmits the rotation of the second output rotor 18 to the pinion shaft 35 is provided.

Further, the select conversion mechanism 12 includes a rack provided in the middle of the pinion 39 provided on the pinion shaft 35 and the shift select shaft 3 as shown in FIG. 3 which is a sectional view taken along line III-III in FIG. 40, a rack and pinion mechanism 41 is provided as a motion conversion mechanism that converts the rotation of the pinion shaft 35 into the movement of the shift select shaft 3 in the first axial direction X1.
As shown in FIG. 3, one end of the shift select shaft 3 is movable in the first axial direction X1 by a slide bearing 43 such as a metal bush held on the inner periphery of a shaft holding cylinder 42 fixed to the housing 14. It is supported so as to be rotatable in the rotational direction Y. The middle portion of the shift select shaft 3 is supported by a slide bearing 45 such as a metal bush held in the shaft holding hole 44 of the housing 14 so as to be movable in the first axial direction X1 and rotatable in the rotational direction Y. ing. The other end of the shift select shaft 3 protrudes out of the housing 14 through the shaft holding hole 44.

The ball nut 30 faces a direction Z that is orthogonal to the second axial direction X2 of the screw shaft 29 (the direction orthogonal to the paper surface in FIG. 3) and is parallel to the first axial direction X1 of the shift select shaft 3. A pair of side surfaces 30a, 30b is provided, and a pair of engagement shafts 46, 47 projecting in the direction Z parallel to the shift select shaft 3 are formed from the side surfaces 30a, 30b.
As shown in FIG. 3, the central axis 29 a of the ball screw 29 is arranged in an axis perpendicular plane P <b> 1 of the shift select shaft 3 (a plane perpendicular to the central axis 9 of the shift select shaft 3).

  Referring to FIG. 3 and FIG. 4 which is an exploded perspective view, the connecting arm 32 includes an arm main body 48 extending orthogonally to the shift select shaft 3, and provided on one end of the arm main body 48 on both sides of the ball nut 30. A first connecting portion 51 having a pair of engaging grooves 49 and 50 engaged with a pair of engaging shafts 46 and 47, respectively, and the shift select shaft 3 via the connecting mechanism 52 provided at the other end of the arm body 48. And a second connecting portion 53 connected thereto.

The first connecting portion 51 includes a pair of engaging groove forming plates 54 and 55 that are opposed to each other with the ball nut 30 sandwiched in the parallel direction Z, and a connecting plate 56 that connects the engaging groove forming plates 54 and 55. It has a groove shape with The connecting plate 56 is connected to the arm body 48 at the center between the engaging groove forming plates 54 and 55.
As shown in FIG. 3, the ball nut 30 has an engaging protrusion 57 formed on the surface opposite to the surface facing the connecting plate 56. The engagement protrusion 57 is engaged with a concave groove 58 provided on the housing 14 and extending parallel to the second axial direction X <b> 2 of the screw shaft 29. A guide mechanism 59 for guiding the movement of the ball nut 30 in the second axial direction X2 of the screw shaft 29 while restricting the rotation of the ball nut 30 around the screw shaft 29 by the engaging protrusion 57 and the concave groove 58. It is configured.

A dry bearing may be interposed between the engaging protrusion 57 and the concave groove 58. As the dry bearing, for example, a cylindrical slide bearing fitted to the outer periphery of the engagement protrusion 57 and a pair of plate-like slide bearings fixed to a pair of inner walls of the concave groove 58 are used in combination. Can be used.
The second connecting portion 53 has a cylindrical shape. A cylindrical bush 60 is press-fitted and fixed to the inner periphery 53 a of the second connecting portion 53. The bush 60 is slidably fitted to the outer periphery 3 a of the shift select shaft 3. The bush 60 has a pair of fixing holes 61 and 62 as insertion holes opposed in the radial direction.

As shown in FIGS. 4 and 6, the coupling mechanism 52 includes a coupling groove 63 that extends in the first axial direction X1 by inserting the shift select shaft 3 in the first radial direction R1, and a second coupling portion of the coupling arm 32. The bush 60 is press-fitted and fixed to the inner periphery 53 a of the ring 53, and the connecting pin 64 is fixed to the second connecting portion 53 via the bush 60 and inserted through the connecting groove 63 with play.
Specifically, the connection pin 64 is inserted into a pair of pin insertion holes 65, 66 provided in the second connection portion 53 and a pair of fixing holes 61 of the bush 60 fixed to the second connection portion 53. , 62 and fixed. The direction in which the pair of pin insertion holes 65 and 66 face each other and the direction in which the pair of fixing holes 61 and 62 face each other coincide with the first radial direction R1 that is the insertion direction of the connecting groove 63.

As shown in FIG. 5, the connecting groove 63 includes a first inner wall 67 and a second inner wall 68 that face the second radial direction R2 orthogonal to the first radial direction R1. The distance L1 between the first inner wall 67 and the second inner wall 68 is larger than the diameter D1 of the connecting pin 64 (L1> D1).
At the time of the selection operation, as shown in FIG. 6, the connecting pin 64 is in a state along the first radial direction R1, that is, the connecting pin 64 is separated from the first inner wall 67 and the second inner wall 68 of the connecting groove 63. In the state, it moves in the first axial direction X1. Thereby, it can suppress that the connection pin 64 becomes resistance of the movement to the 1st axial direction X1 of the shift selection axis | shaft 3 at the time of selection operation.

  On the other hand, at the time of the shift operation, as shown in FIG. 7, as the connecting arm 32 swings, the connecting pin 64 is inclined with respect to the first radial direction R1, and the connecting pin 64 is in the first radial direction R1. The first inner wall 67 and the second inner wall 68 are contacted at two points at both end positions. Although not shown, when the connecting arm 32 swings in the direction opposite to that shown in FIG. 7, the connecting pin 64 is inclined in the direction opposite to that shown in FIG. The first inner wall 67 and the second inner wall 68 are contacted at two points at both end positions in the direction R1.

  According to the present embodiment, as shown in FIG. 5, the distance L1 between the first inner wall 67 and the second inner wall 68 of the connecting groove 63 of the shift select shaft 3 is made larger than the diameter D1 of the connecting pin 64. (L1> D1) Therefore, when the connection pin 64 and the connection groove 63 move relative to each other in the first axial direction X1 during the selection operation, the connection pin 64 and the connection groove 63 are not distorted, and the shift select shaft 3 can be moved smoothly in the first axial direction X1. Even without using the regulating means as in Patent Document 1, it is possible to realize a smooth axial movement of the shift select shaft 3 with a simple structure.

Further, during the shift operation, the connecting pin 64 is inclined with respect to the first radial direction R1 of the shift select shaft 3 and comes into contact with the first inner wall 67 and the second inner wall 68 at both end positions in the first radial direction R1. Thus, the rotation of the connecting arm 32 can be transmitted to the shift select shaft 3.
Further, since the shift select shaft 3 can move smoothly in the first axial direction X1 with respect to the bush 60 to which the connection pin 64 is fixed during the selection operation, there is no possibility that the connection pin 64 and the connection groove 63 will be twisted. .

Further, since the screw shaft 29 as the support shaft and the ball nut 30 as the moving body constitute a ball screw mechanism 31, the support (screw shaft 29) is rotated to smoothly screw the moving body (ball nut 30). The shaft 29 can be moved in the second axial direction X2.
Next, FIG. 8 is a schematic sectional view of a shift conversion mechanism 11P of an electric actuator 1P according to another embodiment of the present invention. Referring to FIG. 8, the present embodiment is mainly different from the embodiment of FIG. That is, in the embodiment of FIG. 3, a single connecting arm 32 is used. On the other hand, in the present embodiment, one end of a pair of connection arms 32P and 32Q having the same specifications in the form of a plate is fixed to the connection member 70, whereby the connection arm unit 32U in which both the connection arms 32P and 32Q are integrated. Is configured.

Specifically, each of the connecting arms 32P and 32Q corresponds to a first connecting portion 51P and 51Q formed with engaging grooves 49P and 50Q for engaging the corresponding engaging shafts 46 and 47 of the ball nut 30, respectively. Second connecting portions 53P and 53Q that are connected to the shift select shaft 3P via connecting mechanisms 52P and 52Q, respectively.
Each of the coupling mechanisms 52P and 52Q includes coupling grooves 63P and 63Q extending through the first axial direction X1 through the shift select shaft 3P in the first radial direction (a direction orthogonal to the paper surface in FIG. 8), and corresponding coupling arms. Bushings 60P and 60Q that are press-fitted into the inner peripheries 53Pa and 53Qa of the cylindrical second connecting portions 53P and 53Q of 32P and 32Q and are slidably fitted to the outer periphery 3a of the shift select shaft 3P, and the bushes 60P and 60Q And connecting pins 64P and 64Q that are fixed to the second connecting portions 53P and 53Q and inserted into the corresponding connecting grooves 63P and 63Q.

The connecting pins 64P and 64Q are press-fitted into a pair of fixing holes (not shown in FIG. 8, corresponding to the fixing holes 61 and 62 of the bush 60 in FIG. 4) of the corresponding bushes 60P and 60Q.
The connecting groove 63P includes a first inner wall 67P and a second inner wall 68P facing the second radial direction R2 orthogonal to the first radial direction of the shift select shaft 3P (the direction orthogonal to the paper surface in FIG. 8). Have. The distance between the second inner wall 67P and the second inner wall 68P is made larger than the diameter of the connecting pin 64P. Further, the connecting groove 63Q includes a first inner wall 67Q and a second inner wall 68Q that face the second radial direction R2 of the shift select shaft 3P. The distance between the second inner wall 67Q and the second inner wall 68Q is larger than the diameter of the connecting pin 64Q.

As shown in FIG. 8, the connecting groove 63P and the connecting groove 63Q may be provided apart from each other in the first axial direction X1 of the shift select shaft 3P, or communicate with each other to form a single connecting groove (see FIG. (Not shown).
The connecting member 70 has one end 70a and the other end 70b that are parallel to the axis perpendicular plane P1 of the shift select shaft 3, and a bolt that extends through the one end 70a and the other end 70b in parallel to the shift select shaft 3P. It has an insertion hole 71.

  The fixing bolt 73 inserted into the bolt insertion hole 72 a of the fixing portion 72 provided in the housing 14 includes a bolt insertion hole 74 a of the plate 74 facing the one end 70 a of the connection member 70, and a bolt insertion hole 71 of the connection member 70. The bolt 75 is inserted through the bolt insertion hole 75 a of the plate 75 facing the other end 70 b of the connecting member 70 and screwed into the nut 76. Thereby, the connecting member and the plates 74 and 75 are fixed to the housing 14.

One end of each connecting arm 32P, 32Q forms a part of a cylindrical surface centering on the central axis 3P of the shift select shaft 3 (corresponding to a part of the outer periphery of the cylindrical second connecting parts 53P, 53Q). Support surfaces 77P and 77Q are provided.
On the other hand, the connecting member 70 forms a part of a cylindrical surface centered on the central axis 9 of the shift select shaft 3P, and supports surfaces 78P and 78Q for supporting the supported surfaces 77P and 77Q of the corresponding connecting arms 32P and 32Q, respectively. have. Each support surface 78P, 78Q functions to guide the rotation of the corresponding connecting arm 32P, 32Q around the central axis 9 of the shift select shaft 3P.

  The connecting member 70 includes a pair of positioning step portions 79P and 79Q that are provided adjacent to the support surfaces 78P and 78Q and face each other in a direction parallel to the first axial direction X1. One end of the corresponding connecting arm 32P is sandwiched between the plate 74 and the positioning step 79P so as to be slidable with respect to the support surface 78P of the connecting member 70, the positioning step 79P and the plate 74. . Further, one end of the corresponding connecting arm 32Q is sandwiched between the plate 75 and the positioning step portion 79Q so as to be slidable with respect to the support surface 78Q of the connecting member 70, the positioning step portion 79Q, and the plate 75. ing.

According to this embodiment, when the connecting pins 64P and 64Q and the connecting grooves 63P and 63Q move relative to each other in the first axis direction X1 during the selection operation, the shift select shaft 3 is moved to the first axis without causing twisting. The same effects as the embodiment of FIG. 3 can be obtained, such as being able to move smoothly in the direction X1.
Further, since the pair of connecting arms 32P and 32Q are separated by a predetermined distance in the first axial direction X1 of the shift select shaft 3P, the shift select shaft as the entire connecting arm unit 32U including the pair of connecting arms 32P and 32Q. 3 can be reduced with respect to the first axial direction X1. As a result, the occurrence of the twist can be further suppressed.

Further, the pair of connecting arms 32P and 32Q can be made into a plate-like simple shape so that parts can be made common, and for example, forging can be easily manufactured.
The present invention is not limited to each of the above-described embodiments. For example, the first inner wall 67; 67P, 67Q and the second inner wall 68; 68P, 68Q of the connecting groove 63; You may coat | cover a material and may arrange | position a well-known plate-shaped slide bearing.

  Although not shown, the bushing 60; 60P, 60Q of the coupling mechanism 52; 52P, 52Q may be eliminated. In this case, the connecting pins 64; 64P, 64Q are press-fitted into the pin insertion holes 65, 66 of the second connecting portion 53; 53P, 53Q and are directly fixed to the second connecting portion 53. In this case, a low friction member such as a fluororesin is provided on at least one of the inner periphery 53a of the second connecting portion 53; 53P, 53Q; 53Pa, 53Qa and the outer periphery 3a of the shift select shaft 3 to be fitted to each other. It is preferable to coat to reduce the sliding resistance of both. In addition, various modifications can be made within the scope of the claims of the present invention.

  DESCRIPTION OF SYMBOLS 1; 1P ... Electric actuator, 2 ... Shift operation mechanism, 3; 3P ... Shift select axis, 9 ... Center axis, 10 ... Electric motor, 11; 11P ... Shift conversion mechanism, 12 ... Select conversion mechanism, 13 ... Switching unit, DESCRIPTION OF SYMBOLS 14 ... Housing, 15 ... Input shaft, 16 ... Input rotor, 17 ... 1st output rotor, 18 ... 2nd output rotor, 19 ... 1st electromagnetic clutch, 20 ... 2nd electromagnetic clutch, 29 ... Screw shaft (support shaft) , 30 ... Ball nut (moving body), 31 ... Ball screw mechanism, 32; 32P, 32Q ... Connection arm, 32U ... Connection arm unit, 35 ... Pinion shaft, 36 ... First gear, 37 ... Second gear, 38 ... Transmission mechanism, 39 ... pinion, 40 ... rack, 41 ... rack and pinion mechanism, 46, 47 ... engagement shaft, 49, 50; 49P, 50Q ... engagement groove, 51; 51P, 51Q ... 1 connection part, 52; 52P, 52Q ... connection mechanism, 53; 53P, 53Q ... second connection part, 60; 60P, 60Q ... bush, 61, 62 ... fixing hole, 63; 63P, 63Q ... connection groove, 64; 64P, 64Q ... connecting pin, 65, 66 ... pin insertion hole, 67; 67P, 67Q ... first inner wall, 68; 68P, 68Q ... second inner wall, 70 ... connecting member, 73 ... fixing bolt, 74, 75 ... plate , 76 ... nut, 77P, 77Q ... supported surface, 78P, 78Q ... support surface, 79P, 79Q ... positioning step, D1 ... (connection pin) diameter, L1 ... (with first inner wall and second inner wall) Distance, R1 ... first radial direction, R2 ... second radial direction, X1 ... axis first direction (of shift select shaft), X2 ... second axis direction (of screw shaft as support shaft), Y ... (shift select) Direction of rotation

Claims (4)

An electric actuator that rotates a shift select shaft for a shift operation and moves the shift select shaft in a first axial direction as an axial direction for the select operation,
An electric motor;
A select conversion mechanism that converts output rotation of the electric motor into movement of the shift select shaft in the first axis direction;
A support shaft that has a staggered shaft relationship with respect to the shift select shaft, a moving body that is driven by the electric motor and moves in a second axial direction as an axial direction of the support shaft, and is connected to the moving body A shift arm for converting the output rotation of the electric motor into the rotation of the shift select shaft, and a connecting arm having a first connecting portion and a second connecting portion connected to the shift select shaft via a connecting mechanism. A mechanism,
The coupling mechanism includes a first inner wall and a second inner wall that extend in the first axial direction through the shift select shaft in the first radial direction and are opposed to a second radial direction orthogonal to the first radial direction. A connecting groove having
A coupling pin fixed to the coupling arm and inserted through the coupling groove with play, and allowing the shift select shaft to move in the first axis direction during a selection operation;
An electric actuator in which a distance between the first inner wall and the second inner wall is larger than a diameter of the connecting pin.   2. The shift pin according to claim 1, wherein the connecting pin is inclined with respect to the first radial direction so as to come into contact with the first inner wall and the second inner wall at two end positions in the first radial direction. Configured electric actuator. In Claim 1 or 2, the connection mechanism includes a bush fixed to the connection arm and slidably fitted to the outer periphery of the shift select shaft.
The connecting pin is an electric actuator fixed to a fixing hole provided in the bush. In any one of Claim 1 to 3, the said support shaft contains the screw shaft rotationally driven by the said electric motor,
The movable body is an electric actuator including a ball nut screwed onto the screw shaft via a ball.

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