JP6224482B2 - Shifting device for automatic transmission - Google Patents

Description

  The present invention relates to a shift operation device for an automatic transmission used in a vehicle.

2. Description of the Related Art Conventionally, several automatic transmissions based on gear-type manual transmissions, which are considered to have good power transmission efficiency, have been proposed as automatic transmissions for vehicles such as automobiles. For example, as shown in Patent Document 1, a shift operation device for an automatic transmission that drives a gear transmission mechanism by a motor and operates a sleeve of a shift clutch engaged with a shift fork to switch the gear stage has been proposed.

  As shown in FIG. 1, a shift operation device disclosed in Patent Document 1 includes a selection drive motor (slide drive motor) that is a drive source (slide actuator) of a slide mechanism, and a drive source (rotation actuator) of a rotation mechanism. ) Which is a shift drive motor (rotation drive motor). The transmission main shaft includes a circumferential rack in the upper part (on the drawing), a spline driving gear driving gear and a spline that is slidably fitted in the axial direction at the center, and a lever below. When the main shaft for shifting is slid by driving of the selection drive motor, one of the gates of the shift fork and its lever are selectively engaged. Then, in the engaged state, the shift drive motor rotates the rotation pinion, the rotation pinion as the bevel gear, the driven gear as the bevel gear, the first intermediate drive gear, the first intermediate driven gear, and the second intermediate The rotational force is sequentially transmitted to the drive gear, the transmission main shaft drive gear, and the transmission main shaft to rotate and drive each shift fork to switch each gear stage.

JP 2002-139145 A (see FIG. 1)

  However, the shift operation device disclosed in Patent Document 1 requires two motors, a shift drive motor and a select drive motor, and various control equipment such as an ECU, a driver, and a sensor associated with the two motors. Is required, resulting in an increase in the number of parts of the shift operation device. In addition, with the increase in the number of parts of such a shift operation device, the manufacturing cost of the shift operation device increases, the mountability of the shift operation device on the vehicle deteriorates, and the weight of the vehicle increases. There was a problem.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a shift operation device for an automatic transmission that can suppress an increase in the number of parts.

An invention of a shift operation device for an automatic transmission according to claim 1 made to solve the above-mentioned problem is a shift operation device for operating a selection mechanism of an automatic transmission mounted on a vehicle, comprising: a main body; A rotating member attached to the main body so as to be rotatable with respect to the main body and capable of moving in the axial direction, an engaging portion protruding from an outer peripheral surface, a shift pin attached to the rotating member, and the main body A shift groove that is rotatably attached and engages with the shift pin is formed on an outer peripheral surface, and a shift member that moves the rotating member in the axial direction by relative rotation with the rotating member; and a main body in the axial direction. movably mounted, wherein the engaging portion and the engaged portion detachably engagement recess is formed is provided, in the axial direction in a state in which the engagement portion is engaged with the engaging recess A plurality of shift fork members that actuate the selection mechanism by being moved, a motor that rotates the shift member forward and backward, and a first one-way that restricts rotation of the shift member only in the forward rotation direction relative to the rotation member. A clutch, a second one-way clutch that restricts rotation of the rotating member in the reverse rotation direction relative to the main body, and the engaged state of the shift fork member at a leading position in the forward rotation direction among the plurality of shift fork members And a guide member provided with a passage recess that allows the engagement portion to pass in the same position as the engagement recess in the axial direction.

According to the shift operation device of the automatic transmission configured as described above, the single motor rotates the shift member in the forward direction, thereby rotating the shift member and the rotation member integrally, and the rotation member is moved to the plurality of shift forks. A select operation for selecting one shift fork member among a plurality of shift fork members is performed by engaging with one shift fork member among the members. A single motor reversely rotates the shift member, thereby rotating the rotation member and the shift member relative to each other, moving the rotation member in the axial direction, and moving the selected shift fork member in the axial direction. Perform the action. As described above, since both the selection operation and the shift operation can be performed by a single motor, it is possible to provide a shift operation device for an automatic transmission that can suppress an increase in the number of parts.

  The guide member is provided adjacent to the engaged portion of the shift fork member at the leading position in the forward rotation direction among the plurality of shift fork members. Thus, when the shift fork member does not move in the axial direction due to the fixing of the selection mechanism, the shift fork member is returned to the original position before the shift operation by the forward rotation of the shift member by the motor. When the rotation member rotates in the forward direction as the shift member rotates in the forward direction, the engaging portion engaged with the engaged portion in front of the guide member is in contact with the guide member. Touch. For this reason, the engagement portion is prevented from falling off from the engaged portion, and the shift fork member is reliably returned to the original position before the shift operation.

The shift operation device for an automatic transmission according to a second aspect is the invention according to the first aspect, wherein the guide member is provided so as to be movable in the axial direction, and the guide member is positioned at a center position of the movement range. And an urging member for returning to. Thereby, in the state in which the engaging portion is engaged with the passage recess of the guide member, the axial movement of the rotating member accompanying the shift operation is not hindered. For this reason, in the case of 2-speed up shifting or 2-speed down shifting, the engagement portion is engaged with the passage recess of the guide member, that is, the engagement portion is not engaged with any engagement recess. By performing the shift operation in the state, the shift operation of the next gear stage can be performed quickly. In other words, in the case of 2-speed up shift or 2-speed down shift, the shift operation must be performed twice. However, if the shift operation is performed with the engagement portion not engaged with any of the engagement recesses, the shift operation is performed. Since the fork member does not move, the synchronization time of the rotation by the synchronizer ring can be reduced, and the second speed up shift or the second speed down shift can be performed quickly.

A shift operation device for an automatic transmission according to a third aspect is the invention according to the first or second aspect, wherein the plurality of engaged portions are provided adjacent to each other in the rotational direction of the rotating member. It has been. As a result, during the reverse shift operation, the engaged portion that is engaged with the engaged portion is located on the side further forward in the forward rotation direction than the engaged portion that is engaged with the engaged portion. By coming into contact with the joint portion, the engagement portion is prevented from falling off from the engaged portion. For this reason, when the reverse shift operation is performed, the engagement portion is prevented from falling off from the engaged portion, and the shift fork member is reliably returned to the original position before the shift operation.

It is a skeleton figure of an automatic transmission provided with the shift operation device of this embodiment, and a vehicle carrying the automatic transmission. It is an axial direction sectional view of a selection mechanism. It is a perspective view of the shift operation apparatus of this embodiment. It is a front view of the shift operation apparatus of this embodiment. FIG. 4A is a side view of the shift operation device according to the present embodiment, as viewed from the direction of the arrow. It is BB sectional drawing of FIG. 4B. It is DD sectional drawing of FIG. It is CC sectional drawing of FIG. It is a front view of a shift member and a shaft. It is explanatory drawing which showed the engagement state of the rotating member engaging part of the state in which the 1st shift fork member is selected, and the to-be-engaged part of a shift fork member. It is explanatory drawing which showed the engagement state of the rotating member engaging part of the state in which the 2nd shift fork member is selected, and the to-be-engaged part of a shift fork member. It is explanatory drawing which showed the engagement state of the rotating member engaging part of the state in which the 3rd shift fork member is selected, and the to-be-engaged part of a shift fork member. It is explanatory drawing which showed the engagement state of the rotation member engagement part of the non-selection state which has not selected the shift fork member, and the to-be-engaged part of a shift fork member. It is a flowchart of the shift control which is a control program performed by AMT-ECU of FIG. It is a conceptual diagram showing the relationship between the position of each shift fork and a gear position. It is an expanded shape figure of the shift groove | channel of a shift member. FIG. 4C is a C view of FIG. 4B and is an explanatory diagram of a guide mechanism. It is explanatory drawing of the guide mechanism in the state which is rotating the shift member to a preparation position. In the reverse shift operation is an explanatory view of a state of a guide mechanism engaging portion in the guide member is in contact. FIG. 4B is a view of A in FIG. 4A in a state where the engaging portion is in contact with the engaged portion of the shift fork member in the reverse shift operation. In the reverse shift operation, a A view of figure 4A in a state where the engaging portion engaging portion in the guide member of the guide mechanism is in contact with. It is sectional drawing of the shift operation apparatus of another embodiment.

(Vehicle equipped with the shift operation device of the present embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a skeleton diagram of an automatic transmission equipped with the shift operation device of the present embodiment and a vehicle 1000 equipped with the automatic transmission. As shown in FIG. 1, a vehicle 1000 includes an engine EG, a clutch C, an automated manual transmission AMT (hereinafter abbreviated as AMT), a differential DF, and driving wheels Wl and Wr.

  The engine EG is a gasoline engine, a diesel engine, or the like that uses a hydrocarbon fuel such as gasoline or light oil, and outputs rotational torque. The rotational torque output from engine EG is transmitted to drive shaft EG-1.

(clutch)
The clutch C is provided between the drive shaft EG-1 and the input shaft 131 of the AMT, connects and disconnects the drive shaft EG-1 and the input shaft 131, and transmits between the drive shaft EG-1 and the input shaft 131. Any type of clutch with electronic control of torque. In the present embodiment, the clutch C is a dry single-plate normally closed clutch, and includes a flywheel 121, a clutch disk 122, a clutch cover 123, a pressure plate 124, and a diaphragm spring 125. The flywheel 121 is a disk having a predetermined mass, is connected to the drive shaft EG-1, and rotates integrally with the drive shaft EG-1. The clutch disk 122 has a disk shape with a friction member 122a provided on the outer edge thereof, and faces the flywheel 121 so as to be detachable. The clutch disk 122 is connected to the input shaft 131 and rotates integrally with the input shaft 131.

  The clutch cover 123 is connected to the outer edge of the flywheel 121 and is provided radially inward from the cylindrical portion 123a provided on the outer peripheral side of the clutch disc 122 and the end of the cylindrical portion 123a opposite to the connection portion with the flywheel 121. It is comprised from the extended annular plate-shaped side peripheral wall 123b. The pressure plate 124 has an annular plate shape and is disposed so as to face the clutch disk 122 on the opposite side to the face facing the flywheel 121 so as to be able to be separated from and attached to the pressure plate 124.

  The diaphragm spring 125 is a kind of so-called disc spring, and a diaphragm that is inclined in the thickness direction is formed. The intermediate portion of the diaphragm spring 125 in the radial direction is in contact with the inner edge of the side peripheral wall 123 b of the clutch cover 123, and the outer edge of the diaphragm spring 125 is in contact with the pressure plate 124. The diaphragm spring 125 presses the clutch disc 122 against the flywheel 121 via the pressure plate 124. In this state, the friction member 122 a of the clutch disk 122 is pressed by the flywheel 121 and the pressure plate 124, and the clutch disk 122 and the flywheel 121 rotate integrally by the frictional force between the friction member 122 a, the flywheel 121, and the pressure plate 124. Then, the drive shaft EG-1 and the input shaft 131 are connected.

  The clutch actuator 129 is driven and controlled by the AMT-ECU 113, and presses or releases the inner edge of the diaphragm spring 125 toward the flywheel 121, thereby making the transmission torque of the clutch C variable. The clutch actuator 129 includes an electric type and a hydraulic type. When the clutch actuator 129 presses the inner edge of the diaphragm spring 125 toward the flywheel 121, the diaphragm spring 125 is deformed and the outer edge of the diaphragm spring 125 is deformed in a direction away from the flywheel 121. Then, due to the deformation of the diaphragm spring 125, the pressing force with which the flywheel 121 and the pressure plate 124 press the clutch disc 122 is gradually reduced, and the transmission torque between the clutch disc 122 and the flywheel 121 is also gradually reduced. The shaft EG-1 and the input shaft 131 are cut. As described above, the AMT-ECU 113 arbitrarily varies the transmission torque between the clutch disk 122 and the flywheel 121 by driving the clutch actuator 129.

(Automated manual transmission)
The AMT is a gear mechanism type automatic transmission that shifts the rotational torque from the engine EG at a gear ratio of a plurality of gears and outputs it to the differential DF. Further, the AMT of this embodiment is a synchro automatic transmission having a synchronizer mechanism described later. The AMT includes an AMT-ECU 113, an input shaft 131, an output shaft 132, a first drive gear 141, a second drive gear 142, a third drive gear 143, a fourth drive gear 144, a fifth drive gear 145, a reverse drive gear 146, First driven gear 151, second driven gear 152, third driven gear 153, fourth driven gear 154, fifth driven gear 155, reverse driven gear 156, output gear 157, reverse idler gear 161, first selection mechanism 100, second selection mechanism 200, A third selection mechanism 300 is included.

  The input shaft 131 is a shaft to which rotational torque from the engine EG is input, and rotates integrally with the clutch disk 122 of the clutch C. The output shaft 132 is a shaft that outputs the rotational torque input to the AMT to the differential DF, and is disposed in parallel with the input shaft 131. The input shaft 131 and the output shaft 132 are rotatably supported by an AMT housing (not shown).

  The first drive gear 141 and the second drive gear 142 are fixed gears fixed to the input shaft 131 so as not to rotate relative to each other. The third drive gear 143, the fourth drive gear 144, the fifth drive gear 145, and the reverse drive gear 146 are idle gears provided on the input shaft 131 so as to be rotatable relative to the input shaft 131.

  The first driven gear 151 and the second driven gear 152 are idle gears attached to the output shaft 132 so as to be capable of relative rotation (free rotation). The third driven gear 153, the fourth driven gear 154, the fifth driven gear 155, the reverse driven gear 156, and the output gear 157 are fixed gears fixed to the output shaft 132 so as not to be relatively rotatable.

  The first drive gear 141 and the first driven gear 151 are gears that mesh with each other and constitute a first gear. The second drive gear 142 and the second driven gear 152 are gears that mesh with each other and constitute a second gear. The third drive gear 143 and the third driven gear 153 are gears that mesh with each other and constitute a third gear. The fourth drive gear 144 and the fourth driven gear 154 are gears that mesh with each other and constitute a fourth speed stage. The fifth drive gear 145 and the fifth driven gear 155 are gears that mesh with each other and constitute a fifth gear.

  The gear diameter increases in the order of the first drive gear 141, the second drive gear 142, the third drive gear 143, the fourth drive gear 144, and the fifth drive gear 145. The first driven gear 151, the second driven gear 152, the third driven gear 153, the fourth driven gear 154, and the fifth driven gear 155 have smaller gear diameters in this order.

  The reverse idler gear 161 is disposed between the reverse drive gear 146 and the reverse driven gear 156 and meshes with the reverse drive gear 146 and the reverse driven gear 156. The reverse idler gear 161, the reverse drive gear 146, and the reverse driven gear 156 are reverse gears.

  The output gear 157 meshes with the ring gear DF-1 of the differential DF, and outputs the rotational torque input to the output shaft 132 to the differential DF.

(Selection mechanism)
[First selection mechanism]
The first selection mechanism 100 selects the first driven gear 151 or the second driven gear 152 and connects it to the output shaft 132 so as not to be relatively rotatable. As shown in FIGS. 1 and 2, the first selection mechanism 100 includes a first clutch hub H1, a first speed engagement member E1, a second speed engagement member E2, a first synchronizer ring R1, a second It consists of a synchronizer ring R2 and a first sleeve S1. The first clutch hub H1 is spline-fixed to the output shaft 132 between the first driven gear 151 and the second driven gear 152 in the axial direction. The first speed engagement member E1 and the second speed engagement member E2 are members fixed to the first driven gear 151 and the second driven gear 152, for example, by press fitting. The first synchronizer ring R1 is interposed between the first clutch hub H1 and the first speed engagement member E1, and the second synchronizer ring R2 is interposed between the first clutch hub H1 and the second speed engagement member E2. Is done. The first sleeve S1 is spline engaged with the outer periphery of the first clutch hub H1 so as to be movable in the axial direction.

  The first selection mechanism 100 enables the engagement of one of the first driven gear 151 and the second driven gear 152 with the output shaft 132, and both the first driven gear 151 and the second driven gear 152 with respect to the output shaft 132. Thus, a known synchronizer mechanism that can be released is configured.

  The first sleeve S1 of the first selection mechanism 100 is not engaged with either the first speed engagement member E1 or the second speed engagement member E2 in the “neutral position” shown in FIG. An annular first engagement groove S1-1 is formed on the outer periphery of the first sleeve S1. A first shift fork F1 (shown in FIG. 3) is engaged with the first engagement groove S1-1.

  When the first sleeve S1 is shifted toward the first driven gear 151 by the first shift fork F1, the first sleeve S1 is spline-engaged with the first synchronizer ring R1 to synchronize the rotation of the output shaft 132 and the first driven gear 151. The first driven gear 151 is then engaged with the external spline on the outer periphery of the first speed engagement member E1, and the first driven gear 151 is connected to the output shaft 132 so as not to be relatively rotatable, thereby forming the first gear. Further, if the first sleeve S1 is shifted to the second driven gear 152 side by the first shift fork F1, the second synchronizer ring R2 similarly synchronizes the rotation of the output shaft 132 and the second driven gear 152, and then Both are connected in a relatively non-rotatable manner to form a second gear.

[Second selection mechanism]
The second selection mechanism 200 selects the third drive gear 143 or the fourth drive gear 144 and connects it to the input shaft 131 so as not to be relatively rotatable. The second selection mechanism 200 includes a second clutch hub H2, a third speed engagement member E3, a fourth speed engagement member E4, a third synchronizer ring R3, a fourth synchronizer ring R4, and a second sleeve S2. It is composed of

  The second selection mechanism 200 is a synchronizer mechanism similar to the first selection mechanism 100, and the second clutch hub H2 is fixed to the input shaft 131 between the third drive gear 143 and the fourth drive gear 144, and The only difference is that the speed engagement member E3 and the fourth speed engagement member E4 are fixed to the third drive gear 143 and the fourth drive gear 144, respectively. In the “neutral position”, the second selection mechanism 200 is not engaged with any of the engagement members E3 and E4. An annular second engagement groove S2-1 is formed on the outer periphery of the second sleeve S2. The second shift fork F2 is engaged with the second engagement groove S2-1.

  If the second sleeve S2 is shifted to the third drive gear 143 by the second shift fork F2, the rotation of the input shaft 131 and the third drive gear 143 is synchronized, and then the two are integrally connected to the third speed. A step is formed. Further, if the second sleeve S2 is shifted to the fourth drive gear 144 side by the second shift fork F2, the rotation of the input shaft 131 and the fourth drive gear 144 is synchronized, and then both are directly connected to the fourth speed. A step is formed.

[Third selection mechanism]
The third selection mechanism 300 selects the fifth drive gear 145 or the reverse drive gear 146 and connects it to the input shaft 131 so as not to be relatively rotatable. The third selection mechanism 300 includes a third clutch hub H3, a fifth speed engagement member E5, a reverse engagement member ER, a fifth synchronizer ring R5, a reverse synchronizer ring RR, and a third sleeve S3. ing.

  The third selection mechanism 300 is a synchronizer mechanism similar to the first selection mechanism 100, and the third clutch hub H3 is fixed to the input shaft 131 between the fifth drive gear 145 and the reverse drive gear 146, and the fifth speed The only difference is that the engagement member E5 and the reverse engagement member ER are fixed to the fourth drive gear 144 and the reverse drive gear 146, respectively. The third selection mechanism 300 is not engaged with any of the engagement members E5 and ER in the “neutral position”. An annular third engagement groove S3-1 is formed on the outer periphery of the third sleeve S3. The third shift fork F3 is engaged with the third engagement groove S3-1.

  If the third sleeve S3 is shifted to the fifth drive gear 145 by the third shift fork F3, after the rotation of the input shaft 131 and the fifth drive gear 145 is synchronized, the two are integrally connected to the fifth speed. A step is formed. Further, if the third sleeve S3 is shifted to the reverse drive gear 146 side by the third shift fork F3, after the rotation of the input shaft 131 and the reverse drive gear 146 is synchronized, both are directly connected to form a reverse stage. Is done.

  The differential DF is a device that transmits the rotational torque input from the output shaft 132 of the AMT to the drive wheels Wl and Wr in a differential manner. The differential DF has a ring gear DF-1 that meshes with the output gear 157. With such a structure, the output shaft 132 is rotationally connected to the drive wheels Wl and Wr.

  The AMT-ECU 113 is an electronic control device that controls the AMT. The AMT-ECU 113 includes an input / output interface, a CPU, a RAM, a ROM, and a “storage unit” such as a nonvolatile memory that are connected via a bus. The CPU executes a program corresponding to a flowchart shown in FIG. The RAM temporarily stores variables necessary for execution of the program, and the “storage unit” stores the program.

(Structure of shift operation device)
Next, the shift operation device 90 of this embodiment will be described with reference to FIGS. The shift operation device 90 operates the AMT selection mechanisms 100 to 300. As shown in FIGS. 3 to 6, the shift operation device 90 includes a housing 10, a shaft 20, a rotation member 30, a shift member 40, a detent member 50, a first shift fork member 61, a second shift fork member 62, and a third. A shift fork member 63, a guide mechanism 80, a motor 70, a detection unit 75, a drive gear 81, and a driven gear 82 are provided.

  In this embodiment, the housing 10 is common to the AMT, but may be a separate body. As shown in FIG. 4A, a shaft 20 is rotatably attached to the housing 10. In the following description, the axial direction of the shaft 20 is simply expressed as “axial direction”. As shown in FIGS. 5, 6 </ b> A, and 6 </ b> B, the shift member 40 has a cylindrical shape in which a mounting hole 40 p penetrating in the axial direction is formed. As shown in FIG. 5, the shaft 20 is inserted into the mounting hole 40 p of the shift member 40, and the shift member 40 is not rotatable relative to the shaft 20 by the bolt 45 that fastens the shift member 40 and the shaft 20. Fixed immovable in the direction. With such a structure, the shift member 40 is rotatably attached to the housing 10. As shown in FIG. 7, a one-round shift groove 40 a is formed on the outer peripheral surface of the shift member 40.

  Hereinafter, the shift groove 40a will be described with reference to FIG. In FIG. 11, a line that goes around the outer peripheral surface of the shift member 40 at the same position in the line direction is a neutral line. Then, one side in the axial direction from the neutral line is the odd-numbered stage side, and the other side in the axial direction from the neutral line is the even-numbered stage side.

  As shown in FIG. 11, the first connection portion 40b is formed at a predetermined angle along the neutral line from the start position (0 °). A first inclined portion 40c inclined from the end of the first connecting portion 40b to the odd-numbered stage side from the neutral line is formed at a predetermined angle. An odd-numbered step portion 40d parallel to the neutral line is formed at a predetermined angle on the odd-numbered step side from the end of the first inclined portion 40c. A second inclined portion 40e inclined from the neutral line toward the even-numbered step side from the end of the odd-numbered step portion 40d is formed at a predetermined angle.

  A second connection portion 40f is formed at a predetermined angle along the neutral line from the end of the second inclined portion 40e. A third inclined portion 40g inclined from the end of the second connection portion 40f to the even-numbered stage side from the neutral line is formed at a predetermined angle. An even-numbered step portion 40h parallel to the neutral line is formed at a predetermined angle on the even-numbered step side from the end of the third inclined portion 40g. A fourth inclined portion 40i that is inclined from the neutral line toward the odd-numbered step side from the end of the even-numbered step portion 40h is formed at a predetermined angle.

  A state of the shift member 40 in which a shift pin 30e (shown in FIGS. 5, 6A, and 7) described later is in the first connection portion 40b or the second connection portion 40f is referred to as a “neutral state”. Moreover, the state of the shift member 40 in which the shift pin 30e is in the odd-numbered step portion 40d is referred to as an “odd-numbered step state”. Furthermore, the state of the shift member 40 in which the shift pin 30e is in the even-numbered step portion 40h is referred to as an “even-numbered step state”. In the “neutral state”, all the shift forks F1 to F3 are in the “neutral position” shown in FIG. 2, and the AMT is in the neutral state. In the “odd stage state”, as shown in FIG. 10, the selected shift forks F1 to F3 are on the odd stage side, and the AMT is any one of the first speed, the third speed, and the fifth speed. In the “even stage state”, the selected shift forks F1 to F3 are on the even stage side, and the AMT is any one of the second speed, the fourth speed, and the reverse.

  As shown in FIG. 5, a cylindrical rotary member 30 is attached to the outer peripheral side of the shift member 40 so as to be rotatable relative to the shift member 40 and movable in the axial direction. In other words, the rotating member 30 is attached to the housing 10 so as to be rotatable and movable in the axial direction. As shown in FIG. 4B, a plurality of engaging portions 30i, 30j, and 30k are formed on the outer peripheral surface of the rotating member 30 at a certain angle. In the present embodiment, the engaging portions 30 i, 30 j, and 30 k are plate-like and formed to protrude in the radial direction of the rotating member 30. Further, three first to third engaging portions 30 i, 30 j, 30 k are formed on the outer peripheral surface of the rotating member 30 at 120 ° intervals.

  As shown in FIG. 4A, one side in the axial direction of the rotating member 30 is an odd-numbered stage side, and the other side in the axial direction of the rotating member 30 is an even-numbered stage side. Note that the directions of the odd-numbered steps and the even-numbered steps of the rotating member 30 and the shift member 40 are the same.

  As shown in FIGS. 3, 6 </ b> A, and 6 </ b> B, a plurality of latch gears 30 b are continuously formed on the outer peripheral surface of the rotating member 30. In the present embodiment, twelve latch gears 30b are formed on the outer peripheral surface of the rotating member 30 with an interval of 30 °. As shown in FIG. 6A and FIG. 6B, one latch gear 30b extends in the direction inclined from the radial direction of the rotating member 30 and the engaging surface 30c extending in the radial direction along the axial direction of the rotating member 30. The top part has the inclined surface 30d connected with the top part of the engaging surface 30c.

  The detent member 50 is attached to the housing 10. As shown in FIGS. 3, 5, 6A, and 6B, the detent member 50 is engaged with the engagement surface 30c of the latch gear 30b. As shown in FIG. 5, the detent member 50 includes a housing 50a, a pawl member 50b, and an urging member 50c. The housing 50 a has a bottomed cylindrical shape that opens to the latch gear 30 b side, and is attached to the housing 10. The pawl member 50b has a hemispherical tip, and the tip protrudes from the opening of the housing 50a and is slidably mounted in the housing 50a. The urging member 50c is a coil spring or the like, and urges the pawl member 50b toward the latch gear 30b.

  As shown in FIGS. 6A and 6B, the tip of the pawl member 50b is in contact with and engaged with the engagement surface 30c of the latch gear 30b. For this reason, the rotation of the rotation member 30 in the reverse rotation direction is restricted. The tip of the pawl member 50b is in contact with the inclined surface 30d of the latch gear 30b. When the rotating member 30 rotates in the forward rotation direction, the pawl member 50b is pressed by the inclined surface 30d and slides toward the housing 50a, and gets over the latch gear 30b. Thus, the latch gear 30b and the detent member 50 restrict the rotation of the rotating member 30 only in the reverse rotation direction with respect to the housing 10 and allow the rotation of the rotating member 30 only in the forward rotation direction with respect to the housing 10. It functions as a “clutch”.

  As shown in FIGS. 5 and 7, a shift pin 30 e that protrudes to the inner peripheral side of the rotating member 30 and engages with the shift groove 40 a of the shift member 40 is attached to the inner peripheral surface of the rotating member 30.

  As shown in FIGS. 5 and 6B, a key recess 40 m is formed in the outer peripheral surface of the shift member 40. A block-like key 41 is attached to the key recess 40 m so as to be slidable in the radial direction of the shift member 40. As shown in FIG. 6B, an engagement surface 41 a that extends in the radial direction of the rotating member 30 along the axial direction is formed on one side surface of the key 41. On the side surface of the key 41 opposite to the engagement surface 41a, there is an inclined surface 41b inclined from the radial direction of the rotating member 30 along the axial direction. A biasing member 42 such as a coil spring is disposed between the bottom of the key recess 40 m and the key 41.

  As shown in FIG. 5 and FIG. 6B, a key engaging recess 30 f that engages with the key 41 is formed in the inner peripheral surface of the rotating member 30. As shown in FIG. 6B, the key engagement recess 30 f has a shape corresponding to the key 41. That is, the key engagement recess 30 f extends in the radial direction along the axial direction of the rotating member 30, and an engaged surface 30 g that contacts and engages with the engagement surface 41 a of the key 41 is formed.

  The key engaging recess 30f has an inclined surface 30h that faces the engaged surface 30g, is inclined from the radial direction along the axial direction of the rotating member 30, and contacts the inclined surface 41b of the key 41. . The crossing angle between the inclined surface 30h and the bottom surface of the key engaging recess 30f is an obtuse angle. The engaged surface 30 g is formed on the forward rotation side with respect to the shift member 40, and the inclined surface 30 h is formed on the reverse rotation side with respect to the shift member 40. As shown in FIG. 5, the width dimension in the axial direction of the shaft 20 of the key engaging recess 30 f is larger than the width dimension in the axial direction of the key 41. For this reason, the rotation member 30 is movable in the axial direction with respect to the shift member 40.

  Since the engagement surface 41 a of the key 41 and the engaged surface 30 g of the rotation member 30 are engaged, the rotation of the rotation member 30 relative to the shift member 40 in the reverse rotation direction is restricted. Since the inclined surface 41b of the key 41 is in contact with the inclined surface 30h of the rotating member 30, the key 41 is moved to the bottom side of the key recess 40m as the shift member 40 rotates relative to the rotating member 30 in the reverse direction. And is accommodated in the key recess 40m, and the rotary member 30 rotates relative to the shift member 40 in the forward rotation direction. As described above, the key 41 and the key engaging recess 30f restrict the rotation of the shift member 40 only in the forward rotation direction relative to the rotation member 30, and allow the shift member 40 to rotate only in the reverse rotation direction relative to the rotation member 30. It functions as a “first one-way clutch”.

  From the position where the key 41 is engaged with the key engagement recess 30f, the shift member 40 is moved from the position where the shift member 40 is reversely rotated with respect to the rotation member 30 by a predetermined angle (less than 180 ° in this embodiment). Even if the key 41 is rotated in the forward rotation direction, the key 41 is not engaged with the key engagement recess 30f, so that the rotating member 30 does not rotate in the forward rotation direction. In other words, the “first one-way clutch” is configured to be capable of backlash by a predetermined angle (less than 180 ° in this embodiment) with respect to the rotation of the shift member 40 in the positive rotation direction with respect to the rotation member 30.

  When the shift member 40 rotates relative to the rotation member 30, the shift member 40 is engaged with the shift groove 40a of the shift member 40 because the shift pin 30e fixed to the rotation member 30 is engaged with the rotation member 30. Moves in the axial direction.

  As shown in FIG. 3, the first shift fork member 61 is disposed on the outer peripheral side of the rotating member 30. The first shift fork member 61 includes a shaft portion 61a, a first engaged portion 61b provided at the base end portion of the shaft portion 61a, and a shift fork F1 provided at the tip of the shaft portion 61a. Yes. The shaft portion 61a is attached to the housing 10 so as to be movable in the axial direction.

In the first engaged portion 61b, an engaging recess 61c that can be engaged with or detached from (disengageable from) the first to third engaging portions 30i, 30j, and 30k is formed as a recess. The shift fork F1 has an arc shape and is engaged with the first engagement groove S1-1 shown in FIG.

  Although not shown, the second shift fork member 62 and the third shift fork member 63 having the same structure as the first shift fork member 61 are disposed on the outer peripheral side of the rotating member 30 from the first shift fork member 61. It is attached to the housing 10 so as to be slidable in the axial direction at a constant angle (30 ° in this embodiment). As shown in FIG. 4B, the first engaged portion 61b, the second engaged portion 62b, and the third engaged portion 63b are related to the first to third engaged portions 30i, 30j, and 30k in the axial direction. At the formed position, the rotating member 30 is disposed on the outer peripheral portion at the predetermined angle (30 ° in the present embodiment). The first shift fork member 61, the second shift fork member 62, and the third shift fork member 63 move in the axial direction, and the force applied to the first shift fork member 61, the second shift fork member 62, and the third shift fork member 63 is applied to the first sleeve S 1 and the second By transmitting to the sleeve S2 and the third sleeve S3, the first sleeve S1, the second sleeve S2, and the third sleeve S3 are moved, respectively, and the AMT first selection mechanism 100, the second selection mechanism 200, respectively. The third selection mechanism 300 is activated.

  A driven gear 82 is fixed to the shaft 20. The motor 70 is a motor whose rotation angle can be controlled. The motor 70 is driven with a rotation angle controlled by an AMT-ECU 113 (shown in FIG. 1). A drive gear 81 that meshes with a driven gear 82 is attached to a rotating shaft 71 of the motor 70. The number of teeth of the driven gear 82 is greater than the number of teeth of the drive gear 81, and the rotation of the motor 70 is decelerated and transmitted to the shaft 20.

  The detection unit 75 is a sensor that detects the rotation angle of the motor 70, and is provided in the vicinity of the rotation shaft 71, for example. The detection unit 75 includes a magnetic sensor such as a Hall IC, a rotary encoder that detects the rotation of the rotary shaft 71, or an image sensor that reads a printing unit having unevenness or light and darkness formed around the outer peripheral surface of the rotary shaft 71. Sensors are included. The detection unit 75 is communicably connected to the AMT-ECU 113 and outputs detected rotation angle information of the motor 70 to the AMT-ECU 113.

  The AMT-ECU 113 can recognize the rotation angle of the shaft 20 and the shift member 40 based on the rotation angle information of the motor 70 output from the detection unit 75. The shaft 20 is rotated forward and backward by the motor 70, but the AMT-ECU 113 recognizes the current rotation angle of the shaft 20 and the shift member 40 from the history of the rotation angle information of the motor 70 output from the detection unit 75. be able to. The AMT-ECU 113 (rotating member rotation angle calculation unit) calculates the rotation angle of the rotation member 30 from the history of the rotation angle information of the motor 70 output from the detection unit 75.

  As shown in FIG. 4B, the guide mechanism 80 is provided adjacent to the engaged portion 63 b of the third shift fork member 63 at the leading position in the forward rotation direction among the shift fork members 61 to 63. As shown in FIG. 12, the guide mechanism 80 includes a shaft 86, a guide member 87, and a spring 88. The shaft 86 is attached to the housing 10. The guide member 87 has a block shape and is formed with an insertion hole 87a. The shaft 86 is inserted into the insertion hole 87 a, and the guide member 87 is attached to the shaft 86 so as to be movable in the axial direction of the shaft 86 and not rotatable with respect to the shaft 86. The moving direction of the guide member 87 is the same as the axial direction of the rotating member 30, that is, the moving direction of the rotating member 30. A passage recess 87b through which the engaging portions 30i, 30j, and 30k can pass (engagement or disengagement) is formed in a recessed portion in the portion of the guide member 87 that faces the rotating member 30.

A spring 88 is attached to the shaft 86 on both sides of the guide member 87. By this spring 88, the guide member 87 is centered to the original position which is the center position of the movement range (state of FIG. 12). In a state where the guide member 87 is located at the original position, the guide member 87 is adjacent to the engaged portion 63b of the third shift fork member 63 at the leading position in the forward rotation direction among the shift fork members 61 to 63. (Shown in FIG. 4B). In a state where the guide member 87 is positioned in the original position, passage recesses 87b are formed in the same position as the hand engaging recess 61c~63c relates axially. When the guide member 87 is in the original position, the engaging portions 30i, 30j, and 30k can pass through the passage recess 87b when the rotating member 30 is rotated by a selection operation described later.

[Select operation]
When the motor 70 rotates in the reverse direction and the shaft 20 rotates in the forward direction, as described above, the “second one-way clutch” (the latch gear 30b and the detent member 50) rotates the rotating member 30 in the forward rotation direction with respect to the housing 10. The “first one-way clutch” (key 41, key engaging recess 30f) restricts the rotation of the rotating member 30 in the reverse rotation direction with respect to the shift member 40. Rotate in the direction of rotation.

  Thus, each time the rotating member 30 rotates in the forward rotation direction and the pawl member 50b gets over the latch gear 30b, any one of the first engaging portion 30i to the third engaging portion 30k becomes the first engaged portion. A state in which the first shift fork member 61 is selected (shown in FIG. 8A) when engaged with the joint portion 61b, and any one of the first engagement portion 30i to the third engagement portion 30k is the second engaged portion. 62b and the second shift fork member 62 is selected (shown in FIG. 8B), any one of the first engaging portion 30i to the third engaging portion 30k is connected to the third engaged portion 63b. When engaged and the third shift fork member 63 is selected (shown in FIG. 8C), any of the first engaged portions 30i to 30k is the first engaged portion 61b. Not engaged with the third engaged portion 63b but engaged with the passage recess 87b of the guide member 87 Made with any of the state of the 4-option state (Figure 8D shows). In the following description, the position (FIGS. 8A to 8D) of the rotating member 30 where any of the shift fork members 61 to 63 is selected is referred to as a “select position”.

  The AMT-ECU 113 recognizes the rotation angle of the shift member 40 based on the rotation angle information of the motor 70 output from the detection unit 75, so that any of the first shift fork member 61 to the third shift fork member 63 is detected. It is possible to recognize a non-selected state in which either the first shift fork member 61 to the third shift fork member 63 are not selected.

  As shown in FIG. 8D, when the engaging portion 30i passes through the engaged portions 61b, 62b, and 63b, the next engaging portion 30j waits before the engaged portions 61b, 62b, and 63b. Therefore, the engaging portion 30j can be engaged with the engaged portions 61b, 62b, 63b with a small rotation angle of the rotating member 30.

  In the “select operation”, the shift member 40 and the rotation member 30 are integrally rotated in the normal rotation direction, and the shift member 40 and the rotation member 30 do not rotate relative to each other, so that the rotation member 30 does not slide in the axial direction.

[Shift operation]
When the motor 70 rotates in the forward direction and the shaft 20 rotates in the reverse direction, as described above, the “second one-way clutch” (the latch gear 30b and the detent member 50) regulates the rotation of the rotating member 30 in the reverse rotation direction. The “first one-way clutch” (key 41, key engaging recess 30f) allows the rotation of the shift member 40 in the reverse rotation direction with respect to the rotation member 30, so that only the shift member 40 is in a state where the rotation member 30 is stopped. The shift member 40 rotates in the reverse rotation direction, and the shift member 40 rotates relative to the rotation member 30 in the reverse rotation direction.

  As described above, when the shift member 40 rotates relative to the rotation member 30 in the reverse rotation direction, the shift pin 30e fixed to the rotation member 30 is engaged with the shift groove 40a, and thus the shift groove 40a of the shift pin 30e. The rotary member 30 slides in the axial direction with the movement relative to. When the rotary member 30 slides in the axial direction in a state where any of the first shift fork member 61 to the third shift fork member 63 is selected, the selected first shift fork member 61 to third shift fork member 63 moves in the axial direction, and the corresponding shift forks F1 to F3 move in the axial direction, and the shift is executed.

  The AMT-ECU 113 recognizes the rotation angle of the shift member 40 and the rotation angle of the rotation member 30 based on the rotation angle information of the motor 70 output from the detection unit 75, and the rotation angle of the shift member 40 (shift pin 30e) is determined. It is possible to recognize whether it is on the odd-numbered stage side, in the neutral position, or on the even-numbered stage side.

(Shift control)
Next, the shift control executed by the AMT-ECU 113 will be described using the flow shown in FIG. 9 and FIG. When the vehicle 1000 is ready to travel, the process proceeds to S11.

If the AMT-ECU 113 determines in S11 that there is a “shift request” (S11: YES), the program proceeds to S12, and if it is determined that there is no “shift request” (S11: NO). , S11 is repeated. Incidentally, AMT-ECU 11 3, when the running state of the vehicle 1000 having the speed of the throttle opening and the vehicle 1000 determines that exceeds the shift line representing the relationship between the throttle opening and the speed, or the driver However, when a shift lever (not shown) is operated, it is determined that there is a “shift request”. In S11, one of the shift fork members 61 to 63 is selected, and one of the gear positions is formed.

  In S12, the AMT-ECU 113 controls the clutch actuator 129 to drive the clutch C so that the transmission torque of the clutch C is 0, and the clutch C is disengaged. When S12 ends, the program proceeds to S13.

In S13, if the AMT-ECU 113 determines that the “shift request” is either a 2 - speed up shift or a 2- speed down shift (S13: YES), the program proceeds to S31, and the “shift request” If it is determined that it is not one of the second speed up shift and the second speed down shift (S13: NO), the program proceeds to S21. The 2- speed upshift means that the upshift from the first speed to the third speed ((1) in FIG. 10), the upshift from the second speed to the fourth speed ((2) in FIG. 10), This is a case where the up-shift is performed to the fifth speed ((3) in FIG. 10). The second speed down shift is a case where a down shift is performed from the fifth speed to the third speed ((4) in FIG. 10). This is the case of downshifting to the first speed ((6) in FIG. 10).

  In S21, when the AMT-ECU 113 determines that the “select operation” is necessary (S21: YES), the program proceeds to S22, and when it is determined that the “select operation” is not necessary (S21). : NO), the program proceeds to S26. When the AMT-ECU 113 shifts up from the 2nd speed to the 3rd speed ((7) in FIG. 10), the AMT-ECU 113 shifts up from the 4th speed to the 5th speed ((8) in FIG. 10). When shifting down to (9) in FIG. 10) When shifting down from the 3rd speed to the 2nd speed ((10) in FIG. 10) When shifting from the 1st speed ((11) in FIG. 10), reverse When it is necessary to reselect the shift fork members 61 to 63 as in the case of shifting to the first speed ((12) in FIG. 10), it is determined that the “select operation” is necessary.

  In S22, the AMT-ECU 113 drives and controls the motor 70 to reversely rotate the shaft 20, thereby positioning the shift pin 30e at the first connection portion 40b or the second connection portion 40f and selecting the selected shift fork. The members 61 to 63 are positioned at the “neutral position”, and the control for setting the AMT to the neutral state is started. When S22 ends, the program proceeds to S23.

  In S23, when the AMT-ECU 113 determines that the AMT is in the neutral state based on the detection signal from the detection unit 75 (S23: YES), the program proceeds to S24, and the AMT is in the neutral state. If it is determined that there is not (S23: NO), the process of S23 is repeated.

  In S <b> 24, the AMT-ECU 113 controls the drive of the motor 70 to rotate the shaft 20 in the forward direction, and selects any one of the shift fork members 61 to 63 corresponding to the “shift request” gear stage. To start. When S24 ends, the program proceeds to S25.

  In S <b> 25, the AMT-ECU 113 calculates the rotation angle of the rotation member 30 based on the detection signal from the detection unit 75. If the AMT-ECU 113 determines that the “select operation” has been completed based on the rotation angle of the rotating member 30 (S25: YES), the program proceeds to S26, and the “select operation” has been completed. If it is determined that there is not (S25: NO), the process of S25 is repeated.

  In S26, the AMT-ECU 113 drives and controls the motor 70 to rotate the shaft 20 in the reverse direction, so that the shift member 40 is rotated to the shift position (odd number side or even number side) where the shift pin 30e is “shift request”. The “shift operation” is started.

  In addition, as shown in FIG. 11, since the 1st connection part 40b and the 2nd connection part 40f are not inclined with respect to the neutral line, the shift pin 30e slides the 1st connection part 40b and the 2nd connection part 40f. As long as the rotation member 30 and the selected shift fork members 61 to 63 are not moved in the axial direction. Further, even if the shift member 40 is rotated in the positive rotation direction by the above-described extra angle, the shift member 40 is rotated forward with respect to the rotary member 30 by the key 41 and the key engagement recess 30f which are the “first one-way clutch”. Since the backlash can be performed at a predetermined angle with respect to the rotation of the direction, the rotation member 30 does not rotate with the rotation of the shift member 40 in the forward rotation direction. When S26 ends, the program proceeds to S51.

  In S31, the AMT-ECU 113 drives and controls the motor 70 to reversely rotate the shaft 20, so that the shift pin 30e is positioned at the first connection portion 40b or the second connection portion 40f, and the selected shift fork is selected. The members 61 to 63 are positioned at the “neutral position”, and the control for setting the AMT to the neutral state is started. For example, in the case of upshifting from the first speed to the third speed, the shift pin 30e in the odd-numbered step portion 40d is moved to the second connection portion 40f to bring the AMT into the neutral state. When S31 ends, the program proceeds to S32.

  In S32, when the AMT-ECU 113 determines that the AMT is in the neutral state based on the detection signal from the detection unit 75 (S32: YES), the program proceeds to S33, and the AMT is in the neutral state. If it is determined that there is not (S32: NO), the process of S32 is repeated.

  In S33, the AMT-ECU 113 controls the drive of the motor 70 to rotate the shaft 20 in the normal direction and starts the control to place the rotating member 30 in the non-selected state (FIG. 8D). When S33 ends, the program proceeds to S34.

  In S <b> 34, the AMT-ECU 113 calculates the rotation angle of the rotation member 30 based on the detection signal from the detection unit 75. If the AMT-ECU 113 determines that the rotating member 30 is in a non-selected state based on the rotation angle of the rotating member 30 (S34: YES, states of FIG. 8D and FIG. 12), the program is transferred to S35. If it is determined that the rotating member 30 is not in the non-selected state (S34: NO), the process of S34 is repeated.

  In S35, the AMT-ECU 113 drives and controls the motor 70 to rotate the shaft 20 in the reverse direction so that the shift member 40 is rotated to the preparation position where the shift pin 30e is in the neutral position before the “shift request” gear position. Start control. For example, in the case of upshifting from the first speed to the third speed, the shift pin 30e positioned at the second connection portion 40f in S31 is positioned at the first connection portion 40b that is the preparation position before the odd-numbered stage side. The shift member 40 is rotated. In the process of S35, as shown in FIG. 13, the guide member 87 engaged with any one of the first to third engaging portions 30i, 30j, and 30k by the passage recess 87b is in the axial direction of the rotating member 30 ( Move in the shift direction). When S35 ends, the program proceeds to S36.

  If the AMT-ECU 113 determines in S36 that the shift member 40 is in the preparation position and the AMT is in the neutral state based on the detection signal from the detection unit 75 (S36: YES), the program is executed. Proceeding to S24, if it is determined that the shift member 40 is not in the preparation position (S36: NO), the process of S36 is repeated.

  If the AMT-ECU 113 determines in S51 that the “shift operation” has been completed based on the detection signal from the detection unit 75 (S51: YES), the program proceeds to S61 and the “shift operation” is completed. If it is determined that it has not been made (S51: NO), the program proceeds to S55.

  If the AMT-ECU 113 determines in S55 that the gear stage cannot be formed and shift is impossible based on the detection signal from the detection unit 75 (S55: YES), the program proceeds to S56. If it is determined that the shift is not possible (S55: NO), the program is returned to S26. When the sleeves S1 to S3 of the synchronizer mechanism cannot be engaged with the synchronizer rings R1 to R5, RR, the engaging members E1 to E5, the external splines on the outer periphery of the ER, and the gear stage cannot be formed, It becomes impossible to shift. In addition, as one of the causes of the inability to shift as described above, the cone surfaces of the engagement members E1 to E5 and ER and the cone surfaces of the synchronizer rings R1 to R5 and RR are in close contact, and the engagement members E1 to E5 and ER The synchronizer rings R1 to R5 and RR cannot be rotated relative to each other, and the splines of the sleeves S1 to S3 cannot enter the splines of the synchronizer rings R1 to R5 and RR and the external splines on the outer periphery of the engaging members E1 to E5 and ER. There is.

In S <b> 56, the AMT-ECU 113 drives and controls the motor 70 to perform the reverse shift operation of rotating the shaft 20 in the forward direction and rotating the shift member 40 to the preparation position before the shift stage of “shift request”. In addition, when any of the engaging portions 30i, 30j, and 30k is engaged with the engaged portion 61b of the first shift fork member 61 or the engaged portion 62b of the second shift fork member 62, the reverse When the rotation member 30 is rotated in the positive direction as the shift member 40 is rotated in the positive direction by the shift operation, as shown in FIG. 15A, the engagement is engaged with the engaged portions 61b and 62b. The portions 30i, 30j, 30k abut against the next engaged portions 62b, 63b in the select direction, preventing further rotation of the rotating member 30, and the engaged portions 61b of the engaging portions 30i, 30j, 30k, Omission from 62b is prevented. In addition, when any of the engaging portions 30i, 30j, and 30k is engaged with the engaged portion 63b of the third shift fork member 63, the shift member 40 is rotated in the forward direction by the reverse shift operation. When the rotating member 30 is rotated in the forward direction, as shown in FIG. 15B, the engaging portions 30i, 30j, 30k engaged with the engaged portion 63b abut on the guide member 87. Further rotation of the rotating member 30 is prevented, and the engagement portions 30i, 30j, 30k are prevented from falling off from the engaged portion 63b. As shown in FIG. 14, in the reverse shift operation, the engaging portions 30 i, 30 j, and 30 k are connected to the passage recess 87 b of the guide member 87 until the shift member 40 is positioned at the preparation position before the gear position for “shift request”. Therefore, the engaging portions 30 i, 30 j, and 30 k cannot pass through the passage recess 87 b of the guide member 87 and abut against the guide member 87. When S56 ends, the program proceeds to S57.

  In S57, the AMT-ECU 113 connects and disconnects the clutch C by controlling the drive of the clutch actuator 129. When the clutch C is connected, positive torque or negative torque is input to the input shaft 131 from the engine EG, and the cone surfaces of the engaging members E1 to E5 and ER and the cone surfaces of the synchronizer rings R1 to R5 and RR are connected. When the close contact is released and the engagement members E1 to E5 and ER and the synchronizer rings R1 to R5 and RR are in a state of being relatively rotatable, the program returns to S26.

  In S61, the AMT-ECU 113 controls the clutch actuator 129 to maximize the transmission torque of the clutch C and connects the clutch C. When S61 ends, the program returns to S11.

(Effect of this embodiment)
As is clear from the above description, as shown in FIG. 4B, the engaged portion of the third shift fork member 63 in which the guide member 87 is at the leading position in the forward rotation direction among the plurality of shift fork members 61 to 63. It is provided adjacent to 63b. Thus, the reverse shift operation is performed in a state where the engaging portions 30i, 30j, and 30k are engaged with the engaged portion 63b in front of the guide member 87, and the shift member 40 is rotated in the forward direction. Accordingly, when the rotating member 30 is rotated in the forward direction, the engaging portions 30i, 30j, and 30k come into contact with the guide member 87 (shown in FIGS. 15B and 14). For this reason, the engagement portions 30i, 30j, and 30k are prevented from falling off from the engaged portion 63b, and the shift member 40 reliably rotates relative to the rotation member 30, so that the third shift fork member 63 is reliably To the original position before the shift operation. In addition, since the engagement portions 30i, 30j, and 30k are prevented from falling off from the engaged portion 63b, a select operation for engaging the engagement portions 30i, 30j, and 30k with the engaged portion 63b again is executed. This prevents the shift time from becoming unnecessarily long.

Also, passage recesses 87b of the guide member 87 is formed at the same position as the engaging recess 61c~63c Te axially smell. Thereby, in the selection operation, when the rotating member 30 rotates, the engaging portions 30i, 30j, and 30k can pass through the passage recess 87b.

  As shown in FIG. 12, the guide member 87 is provided so as to be movable in the axial direction. As a result, as shown in FIG. 13, in the state where the engaging portions 30i, 30j, and 30k are engaged with the passage recess 87b of the guide member 87, the movement in the axial direction of the rotating member 30 accompanying the shift operation is not hindered. . For this reason, in the case of 2-speed up shifting or 2-speed down shifting, the engagement portions 30i, 30j, 30k are engaged with the passage recess 87b of the guide member 87, that is, the engagement portions 30i, 30j, 30k. In a non-selected state in which any of the engaged portions 61b to 63b is not engaged (shown in FIG. 8D), the shift operation of the next gear stage can be quickly performed by performing the shift operation. In other words, in the case of the second speed up shift or the second speed down shift, the shift operation must be performed twice, but the engaging portions 30i, 30j, and 30k are engaged with any of the engaged portions 61b to 63b. If the shift fork members 61 to 63 do not move when the shift operation is performed in a state where there is no gear, the synchronization time of rotation by the synchronizer rings R1 to R5 and RR can be reduced, and the second speed up shift or the second speed down shift can be performed quickly. It can be carried out.

The guide mechanism 80 includes a spring 88 (biasing member) that returns the guide member 87 to the center position of the movement range. Thus, passage recesses 87b of the guide member 87 is located at the same position as the engaging recess 61c~63c Te axially smell. Thereby, in the selection operation, when the rotating member 30 rotates, the engaging portions 30i, 30j, and 30k can surely pass through the passage recess 87b.

  15A, the engaged portions 61b to 63b are provided adjacent to each other in the rotation direction of the rotating member 30. Thereby, during the reverse shift operation, the engaged portions 30i, 30j, 30k engaged with the engaged portions 61b, 62b are engaged with the engaged portions 30i, 30j, 30k. By contacting the engaged portions 62b and 63b on the side further forward in the forward rotation direction than 61b and 62b (shown in FIG. 15A), the engaging portions 30i, 30j, and 30k are separated from the engaged portions 61b and 62b. Dropping is prevented. For this reason, when the shift member 40 reliably rotates relative to the rotating member 30, the shift fork members 61 and 62 are reliably returned to the original positions before the shift operation. Further, since the engagement portions 30i, 30j, and 30k are prevented from falling off from the engaged portions 61b and 62b, the engagement portions 30i, 30j, and 30k are again engaged with the engaged portions 61b and 62b. It is prevented that the selection operation is not executed and the shift time is unnecessarily prolonged.

(Another embodiment)
In the embodiment described above, the motor 70 rotates the shift member 40 via the drive gear 81, the driven gear 82, and the shaft 20. However, the motor 70 may directly rotate the shift member 40.

  In the embodiment described above, the detection unit 75 is a sensor that detects the rotation angle of the shaft 20 or the shift member 40 by detecting the rotation angle of the motor 70. However, the detection unit 75 may be a sensor that directly detects the rotation angle of the shaft 20 or the shift member 40. In this embodiment, the rotation of the motor 70 is decelerated by the drive gear 81 and the driven gear 82, and the detection unit 75 detects the rotation angle of the motor 70. Therefore, the rotation angle of the shift member 40 is detected with high accuracy (high resolution). be able to.

  In the embodiment described above, the “first one-way clutch” is composed of the key 41 and the key engaging recess 30 f, and the “second one-way clutch” is composed of the latch gear 30 b and the detent member 50. However, the "first one-way clutch" and the "second one-way clutch" are a sprag type one-way clutch in which a sprag is disposed between the outer race and the inner race, and a cam is disposed between the outer race and the inner race. Even a cam-type one-way clutch can be used.

  Also, as shown in FIG. 16, the shift member 40 is rotatably attached to the shaft 20, the second one-way clutch 91 that restricts the rotation of the shaft 20 in the forward rotation direction with respect to the rotation member 30, and the rotation member 30 of the shift member 40. The first one-way clutch 92 that allows rotation only in the reverse rotation direction with respect to the shaft and the third one-way clutch 93 that restricts rotation of the shaft 20 in the reverse rotation direction with respect to the shift member 40 may be provided. .

  Even in such an embodiment, when the shaft 20 rotates normally, the second one-way clutch 91 causes the shaft 20 and the rotating member 30 to rotate positively together, and the first one-way clutch 92 shifts the rotating member 30. The member 40 rotates positively integrally, and the “select operation” can be executed. When the shaft 20 rotates in the reverse direction, the rotating member 30 is idled with respect to the shaft 20 by the second one-way clutch 91, and the shaft 20 and the shift member 40 are integrally rotated by the third one-way clutch 93. The rotation member 30 and the shift member 40 are relatively rotated by 92, and the “shift operation” can be executed.

  When the shaft 20 rotates in the forward direction, the second one-way clutch 91 allows the rotation member 30 to rotate in the forward rotation direction with respect to the housing 10. Further, when the shaft 20 rotates in the reverse direction, the second one-way clutch 91 allows the shaft 20 to rotate around the rotating member 30 by allowing the shaft 20 to rotate in the reverse rotating direction with respect to the rotating member 30. The rotation of the member 30 in the reverse rotation direction relative to the housing 10 is restricted.

  DESCRIPTION OF SYMBOLS 10 ... Housing (main body), 30 ... Rotating member, 30b ... Latch gear (2nd one-way clutch), 30e ... Shift pin, 30f ... Key engagement recessed part (1st one-way clutch), 30i, 30j, 30k ... Engagement part, 40 ... shift member, 40a ... shift groove, 50 ... detent member (second one-way clutch), 41 ... key (first one-way clutch), 50b ... pawl member, 61 ... first shift fork member, 62 ... second shift fork 63, third shift fork member, 70, motor, 75, detector, 100, first selection mechanism, 200, second selection mechanism, 300, third selection mechanism

Claims (3)

A shift operation device for operating a selection mechanism of an automatic transmission mounted on a vehicle,
The body,
A rotating member attached to the main body so as to be rotatable with respect to the main body and movable in an axial direction, and having an engaging portion protruding from an outer peripheral surface;
A shift pin attached to the rotating member;
A shift member that is rotatably attached to the main body and has a shift groove that engages with the shift pin formed on an outer peripheral surface, and that moves the rotating member in the axial direction by relative rotation with the rotating member;
Movably mounted in the axial direction of the body, the engaging portion and the engaged portion detachably engagement recess is formed is provided, the engaging portion is engaged with the engaging recess A plurality of shift fork members that actuate the selection mechanism by being moved in the axial direction in a state;
A motor for rotating the shift member forward and backward,
A first one-way clutch that restricts rotation of the shift member only in a positive rotation direction with respect to the rotating member;
A second one-way clutch that restricts rotation of the rotating member only in a reverse rotation direction with respect to the main body;
Among the plurality of shift fork members, provided adjacent to the engaged portion of the shift fork member at the leading position in the forward rotation direction, the engagement portion is located at the same position as the engagement recess in the axial direction. A shift operation device for an automatic transmission, comprising: a guide member having a passage recess that can pass therethrough. The guide member is provided to be movable in the axial direction,
The shift operation device for an automatic transmission according to claim 1, further comprising an urging member that returns the guide member to a center position in a moving range thereof.   The shift operation device for an automatic transmission according to claim 1, wherein the plurality of engaged portions are provided adjacent to each other in a rotation direction of the rotating member.

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