JP4957708B2 - Shifting device for automatic transmission - Google Patents

Description

  The present invention relates to a shift operation device for an automatic transmission provided in a driving force transmission system of a vehicle.

  As a transmission provided in the driving force transmission system of a vehicle, a mechanical automatic, which can omit a torque converter by operating a shift operation (select and shift) in a manual transmission device and a clutch connection / disconnection by an actuator. A transmission is known.

  Such a shift operation device for an automatic transmission includes, for example, a plurality of shift rails each projecting a shift lug and a shift fork and arranged in the select direction, an arm that engages the shift lug, and the arm in the shift direction. And a shift shaft that is movable in the select direction. Then, by driving the shift shaft with an actuator, the arm is moved in the select direction so as to occupy a position that can be engaged with the shift lug corresponding to the selected transmission gear, and then moved in one of the shift directions. Thus, the shift lug is displaced, and the shift gear is shifted by a shift fork interlocked with the shift rail (see, for example, [Patent Document 1]).

JP 2001-304411 A

  In the speed change device configured as described above, position information in the shift direction of each shift lug is necessary to perform the speed change operation. However, if a sensor is used to obtain this position information, the cost increases. However, if a sensor is not used, it will be necessary to position all shift rails to the neutral position when a failure condition such as loss of such position information occurs. When the arm is moved in the select direction and the shift direction in correspondence with all the shift lugs, it takes many man-hours and a long time to complete the positioning.

  Further, in the speed change device having such a configuration, position information in the shift direction and the select direction of the arm is necessary to perform the speed change operation. However, if a sensor is used to obtain this position information, the cost increases. If the position information of the arm in the shift direction and the select direction is lost, it is difficult to position all the shift rails at the neutral position.

  An object of the present invention is to provide a shift operation device for an automatic transmission in which sensors for acquiring position information of each shift lug and arm can be omitted, and all shift rails can be easily positioned at a neutral position. To do.

  In order to achieve the above object, a first aspect of the present invention is directed to a shift member including a shaft portion disposed with its axis centered in the select direction, and an arm portion protruding in the radial direction from the shaft portion; A shift fork portion that shifts a transmission gear in the apparatus is provided, and a plurality of shift rail members that are arranged with a shift axis line directed in a shift direction, and each of the plurality of shift rail members is engageable with the arm portion. A plurality of shift lug members, each shift lug member having a protrusion that can be engaged with the arm portion, and the arm portion is selected by moving in the selection direction and the shift direction. By pressing the protrusion of the shift rail member, the shift fork portion provided in the shift rail member interlocked with the shift lug member causes the target transmission gear to be changed. A shift operation device for an automatic transmission that operates in a shift direction, wherein the shift lug members protrude in a radial direction from the shaft portion and engage with projections of the plurality of shift lug members so that the plurality of shift lug members are in a neutral position in the shift direction. The arm portion is formed so as to avoid engagement with the plurality of shift lug members at a predetermined position in the select direction, and the arm portion is the predetermined member. Rotating the shaft portion around the axis while occupying the position and engaging the initialization member with the protrusions of the plurality of shift lug members initialize the plurality of shift lug members to the neutral position in the shift direction. There is a shift operation device of an automatic transmission.

  According to a second aspect of the present invention, in the shift operation device for an automatic transmission according to the first aspect, the projection portion has a single claw shape, and the shaft center of the shaft portion is a neutral position of the shift lug. When the shift lug member is initialized to a neutral position in the shift direction, the initialization member is disposed on the substantially straight line that extends in the shift direction of the protrusion from the center position in the shift direction of the protrusion. After engaging with one side surface of the projecting portions of the plurality of shift lug members, the shaft is reversed around the axis of the shaft portion and engaged with the other side surface of the projecting portion.

  According to a third aspect of the present invention, in the shift operation device for an automatic transmission according to the first or second aspect, the shaft portion is displaced in synchronization with the initialization member when the shaft portion is rotated around the select axis. The plurality of shift lug members are initialized to a neutral position in the shift direction by having a synchronous displacement member and engaging the initialization member with the plurality of shift lug members by rotating the shaft portion around an axis. It has the 1st position reference member which engages with the synchronous displacement member when it will be in the state, and regulates rotation of the shaft part.

  According to a fourth aspect of the present invention, in the shift operation device for an automatic transmission according to any one of the first to second aspects, the shift member is engaged when the arm portion occupies the predetermined position. And a second position reference member for restricting movement of the arm portion in the select direction.

  The present invention relates to a shift member having a shaft portion arranged with its axis centered in the select direction and an arm portion protruding in the radial direction from the shaft portion, and a shift for performing a shift operation of a transmission gear in the transmission A plurality of shift rail members provided with a fork portion with a shift axis directed in a shift direction, and a plurality of shift lug members each provided in the plurality of shift rail members and engageable with the arm portion; Each shift lug member has a projection that can be engaged with the arm portion, and the arm portion moves in the selection direction and the shift direction to press the projection of the shift lug member that is selected. A shift operation device for an automatic transmission that shifts a target transmission gear by means of the shift fork portion provided on the shift rail member interlocked with the member. An initialization member for initializing the plurality of shift lug members to a neutral position in the shift direction by projecting in a radial direction from the shaft portion and engaging with projections of the plurality of shift lug members. And the arm portion is formed so as to avoid engagement with the plurality of shift lug members at a predetermined position in the select direction, and the shaft portion is pivoted while the arm portion occupies the predetermined position. A shift operation device for an automatic transmission that rotates around a center and engages the initialization member with protrusions of the plurality of shift lug members to initialize the plurality of shift lug members to a neutral position in the shift direction. Therefore, it is possible to omit a sensor for acquiring position information of a plurality of shift lug members, and to reduce the cost due to the sensor arrangement. Reduction is possible and it is possible to provide a shift operating apparatus for an automatic transmission that can be initialized in a short time with ease the position of the plurality of shift rail member.

  The projecting portion has a single claw shape, and the shaft center of the shaft portion is substantially linear extending from the center position of the projecting portion in the shift direction at the neutral position of the shift lug in the extending direction of the projecting portion. When the shift lug member is initialized to a neutral position in the shift direction, the initialization member engages with one side surface of the projections of the plurality of shift lug members and then rotates around the axis of the shaft portion. If it is reversed to engage with the other side surface of the protrusion, initialization can be performed by engaging one initialization member from both sides of the shift lug member in the shift direction, with a simple structure. It is possible to provide a shift operation device for an automatic transmission that can be initialized more reliably and more accurately.

  A synchronous displacement member that displaces in synchronization with the initialization member when the shaft portion is rotated around the select axis, and the initialization member is rotated around the axis to move the initialization member to the plurality of shift lugs; When the plurality of shift lug members are initialized to the neutral position in the shift direction by engaging with the members, the first is engaged with the synchronous displacement member to restrict the rotation of the shaft portion. If the position reference member is provided, the sensor for acquiring the rotational position information of the shift member as well as the sensor for acquiring the positional information of the plurality of shift lug members can be omitted, and the cost of the sensor arrangement can be reduced. It is possible to provide a shift operation device for an automatic transmission that can be reduced and that can easily initialize the positions of a plurality of shift rail members in a short time.

  When the arm portion has a second position reference member that engages with the shift member and restricts movement of the arm portion in the select direction when the arm portion occupies the predetermined position, a plurality of shift lug members Not only sensors for acquiring position information but also sensors for acquiring position information in the select direction of the shift member can be omitted, and the cost due to sensor arrangement can be reduced, and the positions of a plurality of shift rail members can be reduced. It is possible to provide a shift operation device for an automatic transmission that can be easily initialized in a short time.

FIG. 1 shows an automatic transmission according to a shift operation device (hereinafter referred to as “shift operation device”) of an automatic transmission to which the present invention is applied.
The automatic transmission 1 is a dual clutch type automatic transmission, and includes two clutches 2 and 3, two main shafts 4 and 5 arranged coaxially, and two sub shafts 6 and 7. It has. Power is transmitted from the output shaft 9 of the engine 8 to the first main shaft 4 via the first clutch 2. Power is transmitted from the output shaft 9 to the second main shaft 5 via the second clutch 3. The two clutches 2 and 3 are controlled to be disconnected by a hydraulic control circuit (not shown).

  The first auxiliary shaft 6 and the second auxiliary shaft 7 are separated from each other so that the axes thereof are parallel to the first main shaft 4 and the second main shaft 5, and the first main shaft 4 and the second main shaft 5. It is arranged in a state separated from 5. The output gear g2 of the countershaft 6 and the output gear g3 of the countershaft 7 are both configured to transmit power to the reduction gear g1 of the differential 10 at the rear stage of the automatic transmission 1.

  A first speed gear 11, a second speed gear 12, a third speed gear 13, and a sixth speed gear 14 are rotatably supported on the first countershaft 6. A fourth gear 15, a fifth gear 16, and a reverse gear 17 are pivotally supported on the second countershaft 7 and a parking gear 18 is fixed thereto.

  The automatic transmission 1 is provided with four shift forks 20-23. The first shift fork 20 and the second shift fork 21 are slidably installed along the axis of the first countershaft 6, and the third shift fork 22 and the fourth shift fork 23 are It is installed so as to be slidable along the axis of the second auxiliary shaft 7.

  By sliding the shift forks 20 to 23, the second gear 12 and the sixth gear 14 are moved by the first shift fork 20, the first gear 11 and the third gear 13 are moved by the second shift fork 21, Each is selectively connected to or disconnected from the countershaft 6, that is, capable of shifting, and the third shift fork 22 is used for the fourth speed gear 15 and reverse gear 17, and the fourth shift fork 23 is used for the fifth speed gear 16 and parking. Each of the gears 18 can be selectively connected to the auxiliary shaft 7. The first main shaft 4 is connected to a first speed gear 11, a third speed gear 13, and a fifth speed gear 16, while the second main shaft 5 is connected to a second speed gear 12, a fourth speed gear 15, a sixth speed gear 14, and A reverse gear 17 is connected.

  That is, in the automatic transmission 1 of the dual clutch transmission, the first clutch 2 can be selectively switched to the first speed, the third speed, the fifth speed, and the parking, while the second clutch 3 is used. It is configured to be selectively switchable between 2nd speed, 4th speed, 6th speed and reverse.

  As shown in FIG. 2, such a shift operation device 100 of the automatic transmission 1 includes a shaft portion 50 extending in the select direction se with a select axis as an axis extending, and a shift having an actuator 70 connected to one end. Four shift rails as a plurality of shift rail members arranged in parallel in the select direction Se with the shift axis S as the axis oriented in the shift direction Sf orthogonal to the member 55 and the shaft portion 50 and coincident with the front-rear direction in FIG. 30.

  The shift member 55 includes an arm portion 51 as a shifter formed to protrude in a radial direction of the shaft portion 50 from a part of the shaft portion 50 and facing each other, and a shaft portion from the other portion of the shaft portion 50. A flat plate-shaped initialization member 90 projecting in a radial direction different from that of the arm portion 51 in the radial direction of 50, and projecting in the same phase as the initialization member 90 in the radial direction of the shaft portion 50 from still another part of the shaft portion 50. And a flat plate-like synchronous displacement member 91.

  The shift rails 30 are integrally coupled to the shift rails 30 and shift forks 20 to 23 as shift fork portions for performing a shift operation of the transmission gears 11, 12, 13, 14, 15, 16, and 17 in the automatic transmission 1. And a shift lug 40 as a shift lug member that can be engaged with the pair of arm portions 51 and has a single shape, specifically, a single claw-like projection 41.

  As shown in FIG. 3, the protrusion 41 is formed in a manner protruding from the shift lug 40 in the Lr direction, which is a direction substantially perpendicular to the shift direction sf and the select direction Se. In the figure, only a part of the shift member 55 is shown, and the initialization member 90, the synchronous displacement member 91 and the like are not shown.

  The shaft portion 50 is supported above the shift lug 40 so as to be rotatable in the direction indicated by the arrow Sr and movable in the selection direction se. When the shift lug 40 occupies the neutral position in the shift direction Sf, in other words, when the shift forks 20 to 23 of the shift rail 30 are in the neutral state in the shift direction Sf, the projection 41 in the shift direction Sf The shaft portion 50 is formed so as to be located on the central axis Lr in the protruding direction of the protruding portion 41, which is a straight line extending in the extending direction of the protruding portion 41 from the center position. The operation axis Lc, which is the axis of the shaft portion 50, is disposed so as to substantially coincide with the central axis Lr in the protruding direction of the protruding portion 41 in a state where the shift lug 40 occupies the neutral position in the shift direction Sf.

  The pair of arm members 51 are formed so as to protrude downward from the shaft portion 50, and the protrusion 41 moves to any shift position in the shift direction Sf when being held at the neutral position shown in FIG. However, it is in a state of facing and separating from the shaft portion 50 so as to be movable in the select direction se without interfering with the protrusion 41.

  The pair of arm members 51 occupy the same position in the select direction Se. The pair of arm members 51 are displaced in the shift direction Sf by the rotation of the shaft portion 50 in the Sr direction.

  As shown in FIG. 2, the actuator 70 includes a shift motor 71 that rotates the shaft portion 50 around the operation axis Lc of the shaft portion 50 that matches the Sr direction, and an operation axis that matches the shaft portion 50 with the select axis. It has a selection motor 72 that slides in the selection direction se that is the direction of Lc, and a screw feed mechanism 73 that is driven thereby. Both the shift motor 71 and the select motor 72 are servo motors.

  The actuator 70 is drive-controlled by the ECU 62 based on the operation of a shift lever (not shown), the operating state of the engine 8, and the like.

  The ECU 62 includes a calculation unit configured by a CPU (not shown) and a storage unit configured by a ROM, a RAM, and the like (not shown). The ECU 62 controls the operation of the clutches 2 and 3 via a shift control device (not shown) at the time of shifting. Specifically, when switching the gear position, the ECU 62 connects the other clutch 3 or 2 from the state of the current gear position where the one clutch 2 or 3 is connected, while connecting the other clutch 3 or 2. Connect to the gear. Then, when the number of rotations of the next shift stage is synchronized, the previous shift stage is disconnected, thereby realizing a seamless shift. The ECU 62 also initializes the shift lugs 40 and the like by driving the shift motor 71 and the select motor 72 as described later at a timing described later.

As shown in FIG. 3, the protrusion 41 has a pair of side surfaces f0 that are opposite to each other in the shift direction sf, and when a pressing force is applied by one of the pair of arm portions 51 from the one side surface f0 side. The shift fork (any one of 20, 21, 22, and 23) of the shift rail 30 having the protrusion 41 is operated to shift in and is pressed by the other of the arm portions 51 from the other side surface portion f0 side. And the shift fork is configured to perform a shift-out operation.
The shift operation is a shift-in operation and a shift-out operation.

  The speed change operation device 100 presses the shift lug 40 selected by moving the pair of arm portions 51 of the shift member 55 in the selection direction Se and the shift direction Sf by the actuator 70, and thereby includes the selected shift lug 40. The target transmission gear is shifted by any one of the shift forks 20, 21, 22, and 23 provided on the shift rail 30 interlocked with the shift lug 40.

  Referring to FIGS. 4A and 4B, the shift operation is a shifting operation to the first gear (the first clutch 2 side) and the second gear (the second clutch 3 side). The case of performing will be described.

  In this case, the current stage is in the first speed stage, and the pair of arm portions 51 maintain the neutral position shown by the solid line in FIG. 5B, and the 6-2 speed shift rail 30 from the neutral position on the 1-3 speed shift line. After moving to the upper neutral position, the pair of arm portions 51 swings as indicated by the broken line in FIG. 5B, and is at the neutral position indicated by the broken line in FIGS. The projection 41 of the speed shift rail 30 is shifted to the second speed position indicated by the solid line in FIGS. Immediately after that, the pair of arm portions 51 swings to the neutral position shown by the solid line in FIG. 5B, and while keeping this, the selective movement is performed from the neutral position on the 6-2 speed shift rail 30, and the 1-3 speed shift is performed. Returning to the neutral position on the rail 30, the pair of arm portions 51 swings from the neutral position indicated by the solid line in FIG. 5B to the position indicated by the alternate long and short dash line in FIG. The process r for returning the protruding portion 41 of the facing 1-3 speed shift rail 30 at the first gear position indicated by the broken line to the neutral position indicated by the solid line in FIG. When the synchronization is completed, the first clutch 2 is disconnected, the second clutch 3 is engaged, and a seamless transmission is achieved.

  Here, the operation of applying a pressing force by abutting one side surface f0 of the side surfaces f0 of the projection 41 selected by the pair of arm portions 51 and the other side surface f0 of the side surfaces of the projection 41 are shown. Since the operation of applying a pressing force in contact with the shaft is appropriately performed at the time of shifting and at the time of shifting, a single columnar protrusion 41 can perform a shift-in operation (shift-in) and a shift-out operation (shift-speed cancel). As a result, the protruding amount of the protrusion 41 is reduced as much as possible, the degree of layout freedom is large, and the cost is reduced.

  In particular, the pair of arm portions 51 are shifted from the neutral position of the current gear position to the neutral position on the target gear position side and then shifted to the target gear position. The shift-out process is completed simply by returning to the neutral position and returning to the neutral state so that the previous gear position is returned to the neutral position at the neutral position, thus reducing the number of shift-out strokes and smoothing out the shift-out operation. As a result, the shift time is shortened.

  Moreover, when the pair of arm portions 51 swings and the protrusion 41 is shifted to the second speed, the center line Lr of the protrusion 41 and the center of swing of the arm 51 on the side in contact with the protrusion 41 are obtained. Since the angle formed with the line is relatively small, the pressing force applied by the arm portion 51 to the side surface portion f0 of the projection portion 41 is kept relatively large, the shift-out operation is smoothly performed, and the speed change time is shortened.

  In the case of the shift release operation (shift speed release), the other pressing force of the pair of arm portions 51 is dispersed as compared with the shift input operation force. Since a large force is unnecessary, a smooth shift-out operation is maintained. Further, since the shift stroke is shortened to improve the shift speed, the shift operability is further improved in cooperation with the dual clutch.

  The shift operation device 100 performs other shift operations in the same manner. However, when performing the shift operation, the position information of each projection 41 or each shift lug 40, that is, the neutral position or the two shift positions is set. Since some information is necessary, the position information on the storage means of the ECU 62 is stored as shift information every time a shift operation is performed. In this respect, the storage means functions as shift information storage means.

  Here, in order to obtain such position information, a contact type magnetic force sensor or the like is arranged on each shift lug 40 or each shift rail 30 that detects the position of each projection 41 or each shift lug 40. It may be provided, but using a sensor is expensive. However, when the sensor is not used, all the shift information stored in the storage means as the shift information storage means is lost when an electrical disturbance to the ECU 62 is lost, etc. It is necessary to position the projecting portion 41 of the projecting portion 41 in a neutral state and acquire the positional information of each projecting portion 41 or each shift lug 40. When it is moved in the select direction Se and the shift direction Sf in correspondence with the portion 41, it takes a lot of man-hours and a long time to complete positioning.

  For this reason, the speed change operating device 100 includes an initialization member 90, and using this initialization member 90, all the protrusions 41 are positioned and initialized at the neutral position at once in the shift direction Sf, and all the shift lugs 40 are shifted in the shift direction. In Sf, the neutral position is positioned and initialized at one time, and such position information is created and acquired.

  The initialization member 90 has a length equal to or longer than the length in which the four protrusions 41 extend in the selection direction Se, and the shaft portion 50 is selected from the position indicated by the solid line in FIG. When it is displaced to Se and reaches the position indicated by the broken line in the figure, it is positioned in the region including the region where the four projecting portions 41 extend in the select direction Se and can be engaged with all the projecting portions 41. It becomes. On the other hand, the arm portion 51 occupies an engagement avoidance position where it does not engage with any of the protrusions 41 even when the shaft portion 50 rotates in the Sr direction in this state, and engages with all the protrusions 41. It is in a state to avoid. Therefore, when the shaft portion 50 rotates in the Sr direction in such a state, only the initialization member 90 is engaged with the protruding portions 41 in such a manner as to contact all the protruding portions 41.

  In a state where the initialization member 90 is engageable with all the protrusions 41 and the arm portion 51 occupies the engagement avoidance position, and the shaft portion 50 occupies the position indicated by the broken line in FIG. Is in contact with an immovable member 92 constituted by a part of the case of the speed change operation device 100 at the end opposite to the end where the actuator 70 of the shift member 55 is connected. When the initialization member 90 occupies a position for positioning all the protrusions 41 at the neutral position in the Sr direction, the synchronous displacement member 91 is displaced in the Sr direction in synchronization with the initialization member 90, and the immovable member 92 It comes into contact with a pin 93 projecting from.

  Therefore, after the shaft portion 50 contacts the stationary member 92 and the arm portion 51 occupies the engagement avoidance position, the selection motor 72 is driven to displace the shift member 55 in the selection direction Se. When the shift motor 71 is driven until it abuts on the pin 93 and the shift member 55 is rotated in the Sr direction around the operation axis Lc, the initialization member 90 engages with all the protrusions 41 and all the protrusions 41. Occupies a neutral position in the shift direction Sf, and all shift lags 40 occupy positions initialized in the shift direction Sf.

  For example, as shown in FIG. 5, when the protrusion 41 of the 6-2 speed shift rail 30 is at the second gear position indicated by the broken line and the other protrusion 41 occupies the neutral position, the synchronous displacement member 91 is When the shaft portion 50 is rotated to one Sr1 in the Sr direction until it abuts on the pin 93, the initialization member 90 displaces the projection 41 of the 6-2 speed shift rail 30 to the neutral position indicated by the solid line, All the protrusions 41 occupy a neutral position in the shift direction Sf.

  However, the rotation of the shaft portion 50 is performed only in the Sr1 direction until the synchronous displacement member 91 abuts on the pin 93 so that initialization is performed regardless of which projection portion 41 is shifted in any of the shift directions Sf. This is also performed in the Sr2 direction opposite to this. That is, when the projection 41 and the shift lug 40 are initialized to the neutral position in the shift direction Sf, the initialization member 90 rotates in the Sr1 direction around the operation axis Lc to the one side surface f0 of all the projections 41. After the engagement, it is reversed in the Sr2 direction around the operation axis Lc and engaged with the other side face f0 of all the protrusions 41.

  In this way, initialization is completed in a short time by only a first step of displacing the shift member 55 in the select direction Se and a second step of displacing the shift member 55 in the shift direction Sf. Further, it is possible to omit a strike due to the provision of the sensor.

  The pin 93 engages with the synchronous displacement member 91 when all the projections 41 occupy the neutral position in the shift direction Sf and all the shift lugs 40 are initialized in the shift direction Sf, and the shaft portion 50 is engaged. The first position reference member that forms the position reference of the shift member 55 in the shift direction Sf direction by restricting the rotation of the first position reference member. The pin 93 may be constituted by two different members that are separately engaged and abutted when the synchronous displacement member 91 is rotated in the Sr1 direction and the Sr2 direction, respectively.

  The immovable member 92 engages with the shift member 55 when the arm portion 51 occupies the engagement avoidance position, and restricts the movement of the arm portion 51 in the select direction Se so that the shift member 55 in the select direction Se moves. It functions as a second position reference member that forms a position reference. The immovable member 92 may be constituted by other members instead of the case of the speed change operation device 100.

  When the synchronous displacement member 91 abuts on the pin 93 and the shift member 55 abuts on the non-moving member 92, the ECU 62 monitors the load changes of the shift motor 71 and the select motor 72, respectively. Detected by exceeding the threshold. Further, when the initialization is completed, the ECU 62 stores position information indicating that all the protrusions 41 or all the shift lugs 40 occupy the neutral position in the storage means as the shift information storage means.

  When performing a shift operation, not only shift information but also select position information that is information regarding the position of the shift member 55 in the select direction Se, phase in the Sr direction, and shift position information regarding the position in the shift direction Sf are required. The storage means also stores these information. In this respect, the storage means functions as a select position information storage means and a shift position information storage means. The selected position information is stored as the amount of displacement of the shift member 55 from the state where the arm portion 51 occupies the engagement avoidance position, and the shift position information storage means contacts the pin 93 as the synchronous displacement member 91 rotates in the Sr2 direction. The amount of rotation of the shift member 55 from the state is stored.

  The ECU 62 functions as initialization control means in that it performs drive control of the shift motor 71, the select motor 72, the shift member 55, etc. in order to perform such initialization. The timing at which the ECU 62 functions as the initialization control means is such that when the engine 8 is started or stopped, the shift information stored in the shift information storage means is lost due to electrical disturbance to the ECU 62 or the like. This is the case when a fail state occurs.

The configuration example described above includes a pair of arm portions 51 and a single projection 41. However, as shown in FIG. 6, the arm 51 is single and includes a pair of projections 41. It may be a thing. In this case, for example, after the initialization member 90 and the synchronous displacement member 91 are rotated in the Sr direction so that they are directed downward at a position where they do not come into contact with other members such as the protrusions 14, they are displaced in the selection direction Se. When the shaft portion 50 comes into contact with the immovable member 92, the initialization member 90 is configured to enter between the pair of projections 41 of all the shift lugs 40. Further, in this state, the non-moving member 92 is provided with a pair of pins 93 so as to sandwich the synchronous displacement member 91, and is rotated in the Sr1 direction and the Sr2 direction until the synchronous displacement member 91 contacts each pin 93. When the movement is performed, the initialization member 90 is engaged with all the protrusions 41, and all the shift lugs 40 occupy the positions initialized in the shift direction Sf.
In addition, both the arm part 51 and the protrusion part 41 may be single, and also in this case, the configuration is set so that the initialization is performed as appropriate.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments, and the present invention described in the claims is not specifically limited by the above description. Various modifications and changes are possible within the scope of the above.

For example, the initialization member is not flat but discontinuous in the select direction, such as a comb, if it can engage all the shift lug members when the shift member occupies the reference position in the select direction. It may be formed automatically. The synchronous displacement member may be a member integrated with the initialization member.
Further, the automatic transmission to which the shift operation device according to the present invention is applied is not limited to a dual clutch type automatic transmission, and may be an automatic transmission using a single clutch.

  The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

It is a schematic block diagram of the driving force transmission system of the vehicle provided with the speed change operation device of the automatic transmission to which the present invention is applied. 1 is a schematic perspective view of a shift operation device for an automatic transmission to which the present invention is applied. FIG. 3 is an enlarged perspective view of columnar protrusions facing a pair of arm portions in the speed change operation device of the automatic transmission shown in FIG. 2. It is an operation explanatory view of an arm part and a shift lug member which are used with a gear shift operation device of an automatic transmission shown in Drawing 2, and (a) is a schematic plan view and (b) is a schematic front view. FIG. 3 is an operation explanatory view of the arm portion and the shift lug member when the positions of the plurality of shift lug members are initialized in the shift operation device of the automatic transmission shown in FIG. 2, (a) is a schematic front view; b) is a schematic plan view. BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram in the different form of the speed change operation apparatus of the automatic transmission to which this invention is applied, Comprising: (a) is a schematic plan view, (b) is a schematic front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Automatic transmission 11-17 Transmission gear 20-23 Shift fork part 30 Shift rail member 40 Shift lug member 41 Projection part 50 Shaft part 51 Arm part 55 Shift member 90 Initializing member 91 Synchronous displacement member 92 2nd position reference member 93 First position reference member 100 Shift operation device of automatic transmission f0 Side surface of protrusion sf Shift direction se Selection direction Lc Shaft center axis Lr Straight line extending from the center position of the protrusion in the shift direction

Claims (4)

A shift member comprising a shaft portion arranged with its axis oriented in the select direction and an arm portion projecting in the radial direction from the shaft portion;
A plurality of shift rail members provided with a shift fork portion for performing a shift operation of a transmission gear in the transmission, and arranged with a shift axis directed in a shift direction;
A plurality of shift lug members respectively provided on the plurality of shift rail members and engageable with the arm portion;
Have
Each shift lug member has a protrusion that can be engaged with the arm,
When the arm portion moves in the selection direction and the shift direction and presses the projection portion of the selected shift lug member, the shift fork portion provided in the shift rail member interlocked with the shift lug member causes a target shift. A shift operation device for an automatic transmission that shifts a gear,
An initialization member for initializing the plurality of shift lug members to a neutral position in the shift direction by projecting in a radial direction from the shaft portion and engaging with projections of the plurality of shift lug members;
The arm portion is formed so as to avoid engagement with the plurality of shift lug members at a predetermined position in the select direction,
The plurality of shift lug members are moved in the shift direction by rotating the shaft portion around an axis center with the arm portion occupying the predetermined position and engaging the initialization member with protrusions of the plurality of shift lug members. A shift operation device for an automatic transmission, which is initialized to a neutral position at. The shift operation device for an automatic transmission according to claim 1,
The protrusion has a single shape,
The shaft center of the shaft portion is disposed on a substantially straight line extending in the extending direction of the projection from the center position in the shift direction of the projection at the neutral position of the shift lug,
When the shift lug member is initialized to the neutral position in the shift direction, the initialization member is reversed around the axis of the shaft portion after engaging with one side surface of the projections of the plurality of shift lug members. A shift operation device for an automatic transmission, wherein the shift operation device is engaged with the other side surface of the protrusion. The shift operation device for an automatic transmission according to claim 1 or 2,
A synchronous displacement member that is displaced synchronously with the initialization member when the shaft portion rotates about the select axis;
When the plurality of shift lug members are initialized to the neutral position in the shift direction by rotating the shaft portion about the axis and engaging the initialization member with the plurality of shift lug members. A shift operation device for an automatic transmission, comprising: a first position reference member that engages with the synchronous displacement member to restrict rotation of the shaft portion. The shift operation device for an automatic transmission according to any one of claims 1 to 2,
A shift of an automatic transmission comprising a second position reference member that engages with the shift member when the arm portion occupies the predetermined position and restricts movement of the arm portion in a select direction. Operating device.

Images