JP2008082478A - Automatic transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To selectively switch a predetermined rotational member of a planetary gear mechanism between a one-way locking state and a both-ways locking state with a compact structure. <P>SOLUTION: A ring gear 134 as the predetermined rotational member is engageable with a transmission casing 111 using two plate-like couplings PC1, PC2. The one plate-like coupling PC1 functions exclusively as a one-way clutch. The other plate-like coupling PC2 has a structure having a slide plate 12B. By the plate-like coupling PC2, a function for performing rotational restriction in the opposite direction from the rotational restriction direction by the one plate-like coupling PC1 can be selectively obtained. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an automatic transmission.

  In an automatic transmission, particularly an automobile automatic transmission, a multi-stage transmission gear mechanism is configured by a planetary gear mechanism, and the planetary gear mechanism is housed in a transmission casing and a predetermined rotating member in the planetary gear mechanism is shifted. Engagement with the machine casing is performed. For example, as shown in Patent Document 1, various brakes, clutches, and even one-way clutches are used for changing the gear position. For example, a specific brake such as a lowry bus brake is used to configure the first speed. And a specific one-way clutch are incorporated as one set. In this case, the specific brake and the specific one-way clutch that are set as one set serve as an engagement member for engaging the predetermined rotation member with the transmission casing, but in order to cope with a large transmission torque, Generally, it is annularly arranged on the outer periphery of the planetary gear mechanism.

  There are various one-way clutches, but as shown in Patent Document 2, there is a so-called plate-like coupling that can secure a large transmission torque. The plate-like coupling forms a pocket portion on one facing surface of the two opposing first coupling plate and second coupling plate, while forming a notch portion on the other facing surface, The struts swinging around one end in the circumferential direction are housed in a tiltable manner, and the struts are urged toward the standing position by a spring member so that the struts in the standing position are engaged with the notches. By doing so, the relative rotation toward the other end in the circumferential direction is restricted (locked). And in patent document 2, although what uses a plate-shaped coupling as said specific one-way clutch is disclosed in the automatic transmission, this plate-shaped coupling is arrange | positioned at the outer periphery of the planetary gear mechanism. .

Further, in Patent Document 3, as the strut, a first strut having a rocking fulcrum at one end in the circumferential direction and a second strut having a rocking fulcrum at the other end in the circumferential direction are provided. One slide plate having a hole portion and a non-hole portion is provided between the two struts, and by changing the rotation position (slide position) of this slide plate, only one of both struts is set to the standing position. Disclosed is a switch between a direction lock state, an other direction lock state in which only the other is in an upright position, and a neutral state in which both struts are in a lying position (a state in which relative rotation in both directions is allowed). ing.
JP 2003-83439 A JP-T-2001-526366 JP-T-2002-514292

  While the plate-like coupling is configured in a compact manner, it can withstand a considerably large transmission torque. Therefore, the plate-like coupling is expected to be used as a member for restricting rotation in an automatic transmission. In particular, a one-way clutch function that puts a predetermined rotating member in a planetary gear mechanism in a one-way locked state with respect to the transmission casing, and a brake function that puts the predetermined rotating member in a two-way locked state with respect to the transmission casing. When obtaining the brake, the brake is disposed on the outer periphery of the planetary gear mechanism and becomes a large member that extends considerably long in the axial direction of the planetary gear mechanism. This configuration greatly contributes to the miniaturization of the automatic transmission as a whole.

  The present invention has been made in view of the circumstances as described above, and its object is to select a predetermined rotating member in a planetary gear mechanism in a one-way locked state and a two-way locked state with a compact structure. An object is to provide an automatic transmission which can be switched.

In order to achieve the above object, in the present invention, basically, two plate-like couplings are used so that one plate-like coupling functions exclusively as a one-way clutch, while the other plate-like coupling is used. As a structure having a slide plate, a function of restricting rotation in the direction opposite to the rotation restricting direction by one plate-like coupling can be selectively obtained. Specifically, the following solution is adopted in the present invention. That is, as described in claim 1 in the claims,
An automatic transmission in which a planetary gear mechanism constituting a multi-stage transmission gear mechanism is housed in a transmission casing, and a predetermined rotating member that rotates about a predetermined central axis in the planetary gear mechanism is engaged with the transmission casing. In the transmission,
An annular first coupling plate integral with the transmission casing;
A one-side-side second coupling plate that is arranged to face one side of the first coupling plate, and forms a one-side plate-like coupling in cooperation with the first coupling plate;
Another side second coupling plate arranged to face the other side of the first coupling plate and cooperating with the first coupling plate to form the other side plate-like coupling;
Have
Each of the plate-like couplings includes a pocket portion provided on one of the opposing surfaces of the first coupling plate and the second coupling plate, and a notch portion provided on the other of the opposing surfaces, A strut that is housed in each pocket and is tilted by swinging to be engaged with the notch when standing, and a strut that is housed in each pocket and is attached to the standing position. A spring member for energizing,
The struts in the one-surface-side plate-like coupling are set so that one end side in the circumferential direction of the central axis is a swing fulcrum, and when the strut is erected, the one-surface-side second coupling plate is circumferentially Set to restrict rotation to the other end side,
The struts in the other surface side plate-like coupling are set so that the other end in the circumferential direction of the central axis is a swing fulcrum, and the second surface side second coupling plate is set when the strut is raised. Is set to restrict rotation to one end side in the circumferential direction,
The other surface side plate-like coupling is further slidably disposed between the first coupling plate and the other surface side second coupling plate, and has an annular slide plate having a hole portion and a non-hole portion. When the hole portion is positioned on the strut by sliding movement of the annular slide plate, the strut is allowed to be in an upright position, while the non-hole portion is positioned on the strut. Set so that the strut is in a lying position,
It is like that.

  According to the above solution, the one-surface-side plate-like coupling functions as a one-way clutch that restricts rotation of a predetermined rotating member toward the other end in the circumferential direction at all times. Also. The other side plate-like coupling is selected between a state in which the rotation of the predetermined rotating member is not restricted at all and a state in which the rotation toward the one end in the circumferential direction is restricted according to the change in the slide position of the slide plate. When the rotation restriction toward the one end portion in the circumferential direction is performed, the predetermined rotating member is in a two-way locked state together with the function of the one-way clutch by the one-side plate-like coupling. (Brake function) And since the plate-like coupling is compact, compared to the case where the same function is obtained by the set body of the one-way clutch and the brake as before, it is made compact, especially in the radial direction of the central axis. Can be achieved. Of course, since the first coupling plate is used commonly for each plate-like coupling, it is further preferable in terms of compactness.

A preferred mode based on the above solution is as described in claim 2 and the following claims. That is,
A vertical wall portion is formed in the transmission casing adjacent to the axial end surface of the predetermined rotating member and extending toward the central axis.
Each plate-like coupling is disposed between the vertical wall portion and the predetermined rotating member.
(Corresponding to claim 2). In this case, each plate-like coupling is incorporated by making effective use of the space between the predetermined rotating member and the vertical wall portion, and is particularly preferable in terms of downsizing in the radial direction.

A cylindrical portion extending toward the planetary gear mechanism mechanism side is formed on the inner peripheral portion of the vertical wall portion,
Each of the plate-like couplings is disposed on the outer periphery of the cylindrical portion,
(Corresponding to claim 3). In this case, each plate-like coupling is incorporated in the outer periphery of the cylindrical portion, which is preferable in terms of overall compactness.

A bearing for supporting the predetermined rotating member by the cylindrical portion is disposed between the predetermined rotating member and the cylindrical portion,
The bearing is positioned closer to the predetermined rotating member than the plate-like coupling in the central axis direction;
(Corresponding to claim 4). In this case, while the cylindrical member is used to smoothly support the predetermined rotating member and thus the plate-like coupling, the bearing is offset from the plate-like coupling in the central axis direction, and the predetermined rotating member It can be set as the arrangement | positioning structure which utilizes effectively the space located in the edge part side.

The predetermined rotating member includes a first portion extending along one surface side of the first coupling plate, a second portion extending along the other surface side of the first coupling plate, and the first portion and the second portion. An annular connecting member having a substantially U-shaped cross section composed of a third portion connecting the inner peripheral side end portions to each other is integrated.
Among the connecting members, the first portion includes the first surface side second coupling plate, and the second portion includes the other surface side second coupling plate.
(Corresponding to claim 5). In this case, the two second coupling plates can be easily configured using a coupling member having a substantially U-shaped cross section, and two coupling plates can be secured by fixing one coupling member to a predetermined rotating member. Two coupled plates can be simultaneously fixed to a predetermined rotating member.

When the manually operated select lever is in the D range position which is an automatic shift command for forward travel, the strut in the one-side plate-like coupling restricts the rotation of the predetermined rotating member toward the other end in the circumferential direction. The one-way locked state is configured to constitute a predetermined gear stage,
When the manually operated select lever is in the manual mode position for issuing a shift speed change command during forward travel every time it is manually operated, the strut in the other side plate-like coupling is set to the standing position. The predetermined rotating member is configured to be in a two-way locked state in which rotation in both directions on one end side and the other end side in the circumferential direction is restricted to constitute the predetermined shift stage.
(Corresponding to claim 6). In this case, for example, the function of the low reverse brake in Patent Document 1 can be obtained. In particular, in the manual mode, the engine brake can be obtained while ensuring a shift with a direct feeling in the bidirectional lock state.

When the select lever selects reverse travel, the two-way locked state is set and a reverse shift stage is configured (corresponding to claim 7). in this case,
For example, it is possible to obtain a function of obtaining a reverse shift stage using the low reverse brake of the automatic transmission in Patent Document 1.

  According to the present invention, when the predetermined rotating member is selectively engaged with the transmission casing between the one-way locked state and the two-way locked state, the overall configuration can be made compact. .

  The automatic transmission 100 includes, as main components, a torque converter 120, two planetary gear mechanisms 130 and 140 as multi-stage transmission gear mechanisms driven by the output of the torque converter 120, and the planetary gear mechanisms 130 and 140. A plurality of friction elements 151 to 154 for switching the power transmission path and a pair of plate-like couplings PC1 and PC2 are provided. In the embodiment, as will be described later, the plate-like couplings PC1 and PC2 function both as a specific brake (low reverse brake) and a specific one-way clutch (reference numeral 55 in Patent Document 1). The low reverse brake shown and the one-way clutch shown by reference numeral 56 are performed). In the embodiment, as will be described later, the PC 1 is a one-side plate-like coupling that does not have a slide plate, and the PC 2 is a second-side plate-like coupling that has a slide plate.

  When the manually operated select lever (not shown) is in the D range position, automatic transmission between 1st to 4th speed is performed, and when the select lever selects the manual mode, the select lever is Each time a predetermined manual operation is performed, the gear is shifted up or down by one step, and the reverse speed can be realized when the select lever is at the R range position.

  The torque converter 120 includes a pump 122 fixed in a casing 121 connected to the engine output shaft 101, and a turbine 123 that is disposed so as to face the pump 122 and is driven by the pump 122 via hydraulic oil. A stator 125 interposed between the pump 122 and the turbine 123 and supported by the transmission casing 111 via a one-way clutch 124, and an engine output shaft provided between the casing 121 and the turbine 123. 101 and a lockup clutch 126 that directly connects the turbine 123 to the turbine 123. The rotation of the turbine 123 is output to the planetary gear mechanisms 130 and 140 via the turbine shaft 127. An oil pump 112 driven by the engine output shaft 101 via the casing 121 of the torque converter 120 is disposed on the opposite side of the torque converter 120.

  The planetary gear mechanisms 130 and 140 mesh with the sun gears 131 and 141, the plurality of pinions 132 and 142 that mesh with the sun gears 131 and 141, the pinion carriers 133 and 143 that support the pinions 132 and 142, and the pinions 132 and 142. Ring gears 134 and 144.

  A forward clutch 151 is provided between the turbine shaft 127 and the sun gear 131 of the first planetary gear mechanism 130, and a reverse clutch 152 is provided between the turbine shaft 127 and the sun gear 141 of the second planetary gear mechanism 140. A 3-4 clutch 153 is interposed between the second planetary gear mechanism 140 and the pinion carrier 143. The 2-4 brake 154 fixes the sun gear 141 of the second planetary gear mechanism 140. A ring gear 134 of the first planetary gear mechanism 130 and a pinion carrier 143 of the second planetary gear mechanism 140 are connected, and between these and the transmission casing 111, plate-like couplings PC1 and PC2 (a low reverse brake and a one-way). Clutch) is arranged. The pinion carrier 133 of the first planetary gear mechanism 130 and the ring gear 144 of the second planetary gear mechanism 140 are coupled, and the output gear 113 is connected to them.

  The output gear 113 and the first intermediate gear 162 on the idle shaft 161 constituting the intermediate transmission mechanism 160 mesh with each other, and the second intermediate gear 161 on the idle shaft 161 and the input gear 170 of the differential device 170 mesh with each other. The rotation of the output gear 113 is input to the differential casing 172 of the differential device 170, and the left and right axles 173 and 174 are driven through the differential device 170.

  The 2-4 brake 154 includes a band brake. The 2-4 brake 154 has a fastening chamber and a release chamber. The brake 154 is fastened when the operating pressure is supplied only to the fastening chamber, and is not supplied to the fastening chamber and when the operating pressure is supplied to the release chamber. Is released when is supplied. The other friction elements 51 to 53 have a single hydraulic chamber and are fastened when operating pressure is supplied to the hydraulic chamber.

  FIG. 2 shows the relationship between the operating states of the friction elements 151 to 154 and the plate-like couplings PC1 and PC2 and the gear position. In FIG. 2, as will be understood from the description of the plate-like couplings PC1 and PC2, which will be described later, since the PC1 functions as a one-way clutch that is always locked in the other direction (substantially functions as a one-way clutch). When the PC 2 is in the one-way locked state, the two-way locked state corresponds to the low reverse brake engagement state. Note that the locking direction by the PC 1 (the other direction in FIG. 2) is the rotation direction of the turbine shaft 127 serving as the input shaft.

  Here, the aforementioned ring gear 134 is a predetermined rotating member in the present invention, and this ring gear 134 has a predetermined coupling to the transmission casing 111 via the plate-like couplings PC1 and PC2. State. FIG. 3 shows details of the plate-like couplings PC1 and PC2, and FIG. 3 will be described below. In FIG. 3, the center axis of the turbine shaft 127 that also serves as the center axis of the planetary gear mechanism is indicated by a symbol L.

  First, the transmission casing 111 has an annular vertical wall portion 180 that extends toward the central axis L and surrounds the central axis. The vertical wall portion 180 is located between the ring gear 134 and the output gear 113 on the side close to the output gear 113 in the central axis L direction. The inner peripheral portion of the vertical wall member 180 has a cylindrical portion 181 that extends along the predetermined axis L in a direction approaching the ring gear 134. The cylindrical portion 181 is centered on a predetermined axis L, and the outer periphery of the tip portion of the cylindrical portion 180 (the end portion close to the ring gear 134) is used as a predetermined rotating member via a first bearing 182. The ring gear 134 (the end portion on the vertical wall portion 180 side) is supported. Further, the inner peripheral portion of the cylindrical portion 181 supports the shaft portion of the output gear 113 via the second bearing 183.

  On the inner surface of the casing 111, the plate-like couplings PC1 and PC2 described above are disposed between the ring gear 134 and the vertical wall member 180. That is, the first coupling plate 1 made of an annular ring member having a relatively large thickness is fixed to the inner surface of the casing 111. The first coupling plate 1 has an annular shape centered on the central axis L, and is positioned between the ring gear 134 and the vertical wall member 180 so as to surround the outer periphery of the cylindrical portion 181. . The first coupling plate 1 is used commonly for the plate-like couplings PC1 and PC2.

  A connecting member 185 having a generally U-shaped cross section is fixed from the end of the ring gear 134 on the vertical wall 180 side. The connecting member 185 includes a pair of second connecting plates 2 disposed so as to sandwich the first connecting plate 1 from the central axis L direction, and connecting portions that connect inner peripheral side ends of the second connecting plates 2. 186, and two divided members are integrated by a coupling plate 187. The first bearing 182 is disposed slightly offset from the plate-like couplings PC1 and PC2 on the side close to the ring gear 134 in the central axis L direction.

  Next, the details of the plate-like couplings PC1 and PC2 will be described with reference to FIG. 4 and subsequent figures. The plate-like coupling PC1 on the left side of FIG. The plate-like coupling PC2 on the side is the other-side plate-like coupling.

  4 to 6 show a one-side plate-like coupling PC1 that does not have a slide plate. This PC1 will be described below. First, the one-surface-side second coupling plate 2A is disposed so as to face one surface side (the left surface side in FIG. 3) of the first coupling plate 1. The one-surface-side second coupling plate 2A is formed in an annular shape centered on the central axis L, and is formed of metal and thick so as to increase rigidity in terms of power transmission.

  A total of four pocket portions (concave portions) 21 </ b> A are formed on one surface side of the first coupling plate 1 at equal intervals of 90 degrees in the circumferential direction. Four notch portions 31A are formed on the facing surface of the one-surface-side second coupling plate 2A, that is, the surface facing the first coupling plate 1, corresponding to the four pocket portions 21A described above (four The notches 31A are arranged at intervals of 90 degrees in the circumferential direction).

  A strut 41A is housed in the pocket portion 21A so as to be able to rise and fall. The strut 41A is swingable with one end in the circumferential direction as a fulcrum. According to the swing, the strut 41A is in a lying position stored in the pocket portion 21A, and from the pocket portion 21A to the second coupling plate 2A side. It is possible to take a standing position that protrudes greatly toward the head. For the purpose of transmitting torque, the strut 41A is configured to be excellent in rigidity, for example, by an iron-based metal. When the strut 41A is in its standing position, the strut 41A is inclined at, for example, about 30 degrees to 40 degrees with respect to the lying position, and transmits torque in the rotational direction between the first surface side second coupling plate 2A. ing. And the front-end | tip part (end part on the opposite side to the rocking | fulcrum fulcrum side edge part) of the strut 41A in an upright position is surface-contacted with the inclined surface by which the inclination angle was set comparatively large among the above-mentioned notch part 31A. Similarly, the end portion on the swing fulcrum side of the strut 41A is also in surface contact with the circumferential end surface of the pocket portion 21A.

  In the pocket portion 21A, a spring member 51A for urging the strut 41A toward the standing position is disposed on the back side of the strut 41A (the side opposite to the second coupling plate 2A). In the embodiment, the spring member 51A is constituted by a coil spring, but an appropriate spring such as a leaf spring can be used. In particular, in FIG. 6, when the one-surface-side second coupling plate 2 </ b> A rotates to the left in FIG. 6 with respect to the first coupling plate 1, the strut 41 </ b> A is appropriately placed in the lying position by the pressing action of the one-surface-side second coupling plate 2 </ b> A. Thus, the rotation of the one-surface-side second coupling plate 2A in one direction is always allowed. On the other hand, when the one-surface-side second coupling plate 2A rotates to the right in FIG. 6 with respect to the first coupling plate 1, the strut 41A is brought into an upright position and engaged with the notch portion 31A. The rotation in the other direction of the second side coupling plate 2A is restricted (locked). Thus, the one-surface-side plate-like coupling PC1 functions as a one-way clutch that always restricts rotation in the other direction of the first-surface-side second coupling plate 2A while allowing rotation in one direction.

  7 to 11 show the other surface side plate-like coupling PC2, and the same constituent elements as the one-surface side plate-like coupling PC1 described above are replaced with “B” instead of “A” used in PC1. ”Will be omitted to avoid redundant description. That is, the other surface side second coupling plate is indicated by 2B, the pocket portion is indicated by reference numeral 21B, the notch portion is indicated by reference numeral 31B, the strut is indicated by reference numeral 41B, and the spring seat member is indicated by reference numeral 51B. . Based on the above premise, the description will be made mainly focusing on differences from the one-side plate-like coupling PC1.

  First, in addition to the pocket portion 21B formed on the other surface side of the first coupling plate 1, the number of the notch portions 31B, the struts 41B, and the spring seat members 51B is four as with the one-surface plate-like coupling PC1. However, the positional relationship is 45 degrees with respect to the arrangement of the one-surface-side plate-like coupling PC1 (in FIG. The arrangement positional relationship is shown). Further, the rotation restricting direction of the other surface side second coupling plate 2B by the strut 41B (notch portion 31B) is set to be opposite to the rotation restricting direction of the one surface side second coupling plate 2A. That is, FIGS. 7 and 9 are drawn with the strut inclination set in the same manner as in FIGS. 4 and 5, but FIGS. 4 and 5 show the case when viewed from the left side of FIG. 3. 7 and 9, the rotation restriction directions by the struts 41A and 41B on the one surface side and the other surface side appear to be the same because of the view seen from the right side of FIG. Are actually set in opposite directions.

  The other surface side plate-like coupling PC2 is different from the one surface side plate-like coupling PC1 in that it has a slide plate 12B. The slide plate 12B is formed in an annular shape centered on the central axis L, and is set to be thin because it is not related to torque transmission. The slide plate 12B has a hole portion 13a and a non-hole portion 13b. Four hole portions 13a are formed corresponding to the struts 41B, and are slightly larger than the pocket portion 21B. The positions where the hole portions 13a are formed are equally spaced by 90 degrees in the circumferential direction of the central axis L, and the distance from the central axis L is the same as the distance from the central axis L of the strut 41B (pocket portion 21B). Is set to Thus, by sliding the slide plate 12B around the central axis L, the state in which the hole portion 13a is located in the pocket portion 21B and the state in which the non-hole portion 13b is located in the pocket portion 21B can be selectively taken. It has become. When the hole portion 13a is positioned in the pocket portion 21B, the strut 41B is set to the standing position, and the rotation of the other surface side second coupling plate 2B in the other direction is restricted (see FIGS. 7, 8 and 10). . Moreover, when the non-hole part 13b is located in the pocket part 21B, it will be in the free state in which rotation of the other surface side 2nd coupling plate 2B is not controlled at all (refer FIG. 9, FIG. 11).

  As described with reference to FIG. 2, the two gear couplings PC1 and PC2 cause the ring gear 134 as a predetermined rotating member to be in a one-way locked state (function of a one-way clutch by the one-surface plate coupling PC1). The bidirectional lock state is selectively switched. That is, when the other surface side plate-like coupling PC2 is in a bidirectional free state, the ring gear 134 is in a one-way locked state due to the rotation restriction by the one surface side plate-like coupling PC1. Further, by setting the other surface side plate-like coupling PC2 in the other direction locked state, the ring gear 134 is brought into the two-way locked state together with the one-way locked state by the one surface side plate-like coupling PC1.

  The outer peripheral edge portions of the second coupling plates 2A and 2B are set so as to be substantially coincident with the outer peripheral edge portion of the ring gear 134 as a predetermined rotating member in the radial direction of the central axis L. Due to the serial arrangement of the coupling plates 2A and 2B with respect to the ring gear 134 and the structure in which each of the second coupling plates 2A and 2B does not project greatly outward in the radial direction of the ring gear 134, the second coupling plates 2A and 2B are made to ring. The transmission casing 111 can be made sufficiently small in the radial direction as compared to the case where the transmission casing 111 is disposed on the outer periphery. Further, by setting the outer peripheral edge of the second coupling plates 2A and 2B to a position substantially coincident with the outer peripheral edge of the ring gear 134, the outer diameter of the second coupling plates 2A and 2B is secured as large as possible, This is preferable for receiving the transmission torque.

  As shown in FIG. 7, a protrusion 12 c extending outward in the circumferential direction is formed on the outer edge of the slide plate 12, and an actuator 61 is connected to the protrusion 12 c. The slide movement of the slide plate 12B (rotation around the central axis L) is performed by the actuator 61, and as described above, the other side plate-like coupling PC2 is switched between the one-way locked state and the two-way free state. It is done.

  FIG. 12 shows an example of the actuator 61. In the embodiment, the actuator 61 is hydraulic. That is, 90 is a valve body disposed at the bottom of the transmission casing 111, and a cylinder portion 91 is formed in the valve body 90. A piston 92 is disposed in the cylinder portion 91 so as to be able to reciprocate. The piston 92 is urged in one direction by a spring 93. An oil chamber 94 defined in the cylinder portion 91 by a piston 92 is connected to a pump 96 via an electromagnetic switching valve 95. Reference numeral 97 denotes an accumulator.

  When the oil chamber 94 is connected to the pump 96 side by the switching valve 95, the piston 92 is moved against the spring 93 and moved to the stroke end in the other direction. When the oil chamber 94 is drained by the switching valve 95, the piston 92 is returned to the one-way stroke end of FIG. From such a piston 92, an extension part 98 extends to the outside of the valve body 90, and a protrusion 12c (a recess formed in the slide plate 12B) is formed on a pin 99 provided on the extension part 98. Mated and connected. The piston 92 is repositioned between two positions. Since each of the two positions is a stroke end, the positioning is performed with extremely high accuracy, and the positioning of the two positions of the slide plate 12B is also accurate. Will be done.

  Although the embodiment has been described above, the present invention is not limited to the embodiment, and can be appropriately changed within the scope described in the scope of claims. For example, the invention includes the following cases. . Pocket portions 21A and 21B, that is, struts 41A and 41B and spring members 51A and 51B may be disposed on the second coupling plates 2A and 2B. Instead of sliding (rotating) the slide plate 12B around the central axis L, the slide plate 12B can be slid in a direction orthogonal to the central axis L, for example. The actuator 61 is not limited to a hydraulic type, and an appropriate type such as an electric type can be adopted. The pocket portions 21A and 21B (that is, the same for the struts 41A and 41B) may be one or three or more, and the numbers of the pocket portions 21A and 21B may be different from each other (in particular, Suitable when there is a difference in the magnitude of torque transmission in the rotation direction). The positional relationship between the plate-like couplings PC1 and PC2 may be the opposite side in FIG. 3 (a plate-like coupling having a slide plate 12B may be arranged on the left side in FIG. 3). As the planetary gear mechanism as the multi-speed gear mechanism, an appropriate type can be adopted. The plate-like couplings PC1 and PC2 can share parts by setting the size and the like in common except for the presence or absence of the slide plate 12B (the arrangement in which the slide plate 12B is removed from the PC2 is arranged) PC1 can be configured by changing the position, and vice versa). Of course, the object of the present invention is not limited to what is explicitly stated, but also implicitly includes providing what is substantially preferred or expressed as an advantage.

The skeleton figure which shows an example of the automatic transmission with which this invention is applied. The figure which shows the fastening relationship of the gear stage and friction element etc. of the automatic transmission shown in FIG. The principal part sectional drawing which shows the detail of a plate-shaped coupling part among FIG. FIG. 4 shows the one-side plate-like coupling, and is a view when the first coupling plate portion is viewed from the left in FIG. 3. The perspective view of FIG. FIG. 6 is a cross-sectional view corresponding to line X6-X6 in FIG. 4. The other side plate-like coupling is shown, and is a view when the slide plate and the first coupling plate portion are viewed from the right side of FIG. 3 and shows a state when the strut is in the standing position. The perspective view of FIG. The figure which shows the state which made the strut the fall position by sliding a slide plate from the state of FIG. X10-X10 line equivalent sectional drawing of FIG. FIG. 10 is a cross-sectional view corresponding to line X11-X11 in FIG. 9; The system diagram which shows an example of the actuator for slidingly driving a slide plate.

Explanation of symbols

1: 1st coupling plate 2A: 2nd coupling plate (one side)
2B: 2 coupling plates (other side)
12B: Slide plate 12c: Projection (connecting part to actuator)
13a: Hole part 13b: Non-hole part 21A: Pocket part (one side)
21B: Pocket part (the other side)
31A: Notch (one side)
32A: Notch (other side)
41A: Strut (one side)
42B: Strut (other side)
51A: Spring member (one side)
51B: Spring member (other side)
61: Actuator 100: Automatic transmission 111: Transmission casing 130, 140: Planetary gear mechanism 134: Ring gear (predetermined rotating member)
L: predetermined center axis

Claims (7)

An automatic transmission in which a planetary gear mechanism constituting a multi-stage transmission gear mechanism is housed in a transmission casing, and a predetermined rotating member that rotates about a predetermined central axis in the planetary gear mechanism is engaged with the transmission casing. In the transmission,
An annular first coupling plate integral with the transmission casing;
A one-side-side second coupling plate that is arranged to face one side of the first coupling plate, and forms a one-side plate-like coupling in cooperation with the first coupling plate;
Another side second coupling plate arranged to face the other side of the first coupling plate and cooperating with the first coupling plate to form the other side plate-like coupling;
Have
Each of the plate-like couplings includes a pocket portion provided on one of the opposing surfaces of the first coupling plate and the second coupling plate, and a notch portion provided on the other of the opposing surfaces, A strut that is housed in each pocket and is tilted by swinging to be engaged with the notch when standing, and a strut that is housed in each pocket and is attached to the standing position. A spring member for energizing,
The struts in the one-surface-side plate-like coupling are set so that one end side in the circumferential direction of the central axis is a swing fulcrum, and when the strut is erected, the one-surface-side second coupling plate is circumferentially Set to restrict rotation to the other end side,
The struts in the other surface side plate-like coupling are set so that the other end in the circumferential direction of the central axis is a swing fulcrum, and the second surface side second coupling plate is set when the strut is raised. Is set to restrict rotation to one end side in the circumferential direction,
The other surface side plate-like coupling is further slidably disposed between the first coupling plate and the other surface side second coupling plate, and has an annular slide plate having a hole portion and a non-hole portion. When the hole portion is positioned on the strut by sliding movement of the annular slide plate, the strut is allowed to be in an upright position, while the non-hole portion is positioned on the strut. Set so that the strut is in a lying position,
An automatic transmission characterized by that. In claim 1,
A vertical wall portion is formed in the transmission casing adjacent to the axial end surface of the predetermined rotating member and extending toward the central axis.
Each plate-like coupling is disposed between the vertical wall portion and the predetermined rotating member.
An automatic transmission characterized by that. In claim 2,
A cylindrical portion extending toward the planetary gear mechanism mechanism side is formed on the inner peripheral portion of the vertical wall portion,
Each of the plate-like couplings is disposed on the outer periphery of the cylindrical portion,
An automatic transmission characterized by that. In claim 3,
A bearing for supporting the predetermined rotating member by the cylindrical portion is disposed between the predetermined rotating member and the cylindrical portion,
The bearing is positioned closer to the predetermined rotating member than the plate-like coupling in the central axis direction;
An automatic transmission characterized by that. In any one of Claims 1 thru | or 4,
The predetermined rotating member includes a first portion extending along one surface side of the first coupling plate, a second portion extending along the other surface side of the first coupling plate, and the first portion and the second portion. An annular connecting member having a substantially U-shaped cross section composed of a third portion connecting the inner peripheral side end portions to each other is integrated.
Among the connecting members, the first portion includes the first surface side second coupling plate, and the second portion includes the other surface side second coupling plate.
An automatic transmission characterized by that. In any one of Claims 1 thru | or 5,
When the manually operated select lever is in the D range position which is an automatic shift command for forward travel, the strut in the one-side plate-like coupling restricts the rotation of the predetermined rotating member toward the other end in the circumferential direction. The one-way locked state is configured to constitute a predetermined gear stage,
When the manually operated select lever is in the manual mode position for issuing a shift speed change command during forward travel every time it is manually operated, the strut in the other side plate-like coupling is set to the standing position. The predetermined rotating member is configured to be in a two-way locked state in which rotation in both directions on one end side and the other end side in the circumferential direction is restricted to constitute the predetermined shift stage.
An automatic transmission characterized by that. In claim 6,
An automatic transmission characterized in that when the select lever selects reverse travel, the two-way lock state is established and a reverse shift stage is configured.

Images