JP2008082477A - Automatic transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To selectively switch a predetermined rotational member of a planetary gear mechanism among a one-way locking state, a both-ways locking state, and a neutral 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 couplings PC1, PC2 are selectively switched between a state of functioning as a one-way clutch and a state of not restricting rotation by change of a slide position of a slide plate 12A or a slide plate 12B. The rotational restriction directions of the couplings PC1 and PC2 are set in opposite directions from each other. Rotations in both directions of the ring gear 134 are allowed by bringing each of the couplings PC1, PC2 in a state of not restricting rotation. <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 the rotation restricting directions of predetermined rotating members by the respective plate-like couplings are opposite to each other. In addition to being set, a state in which the rotation is not restricted by each plate-like coupling is 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 to be energized, and an annular slide plate disposed between the first coupling plate and each second coupling plate and having a hole portion and a non-hole portion;
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 one-side plate-like coupling further allows the strut to be in an upright position when the hole portion is positioned on the strut by the sliding movement of the slide plate, while the non-hole portion is attached to the strut. When set, the strut is set to be in the lying position,
The other side plate-like coupling further allows the strut to be in an upright position when the hole portion is positioned on the strut by sliding movement of the slide plate, while the non-hole portion is the strut. Set so that the strut is in the lying position when located in
It is like that.

  According to the above-described solution technique, by changing the slide position of the slide plate in each plate-like coupling, a bidirectional lock state (brake function) in which bidirectional rotation of a predetermined rotating member is restricted, and one plate-like In addition to being able to selectively obtain a state in which only one-direction rotation is restricted only by coupling (one-way clutch function), it is also possible to obtain a neutral state in which rotation restriction by each plate-like coupling is not performed (rotation). Resistance reduction). 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, PC1 is a one-side plate-like coupling, and PC2 is another-side plate-like coupling.

  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, the PC1 functions as a one-way clutch that locks in the other direction (substantially only when it functions as a one-way clutch). When the PC1 and PC2 are in the directional lock state, the bi-directional lock state is established, which corresponds to the engaged state of the low reverse brake. 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 8 show the other side plate-like coupling PC2 having a slide plate, which will be described below. First, the other surface side second coupling plate 2B is disposed to face the other surface side (the right surface side in FIG. 3) of the first coupling plate 1. The other-surface-side second coupling plate 2B 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> B are formed on the other surface side of the first coupling plate 1 at equal intervals of 90 degrees in the circumferential direction. Four notches 31B are formed on the facing surface of the other surface side second coupling plate 2B, that is, the surface facing the first coupling plate 1, corresponding to the four pocket portions 21B described above (4). The two notches 31B are arranged at intervals of 90 degrees in the circumferential direction).

  A strut 41B is housed in the pocket portion 21B so that it can be tilted up and down. The strut 41B can be swung with the other end portion in the circumferential direction as a fulcrum, and in accordance with the swinging, the fall position stored in the pocket portion 21B and the second coupling plate 2B from the pocket portion 21B. It is possible to take a standing position that protrudes greatly toward the side. The strut 41 </ b> B is configured to be excellent in rigidity, for example, by an iron-based metal in terms of performing torque transmission. In the standing position, the strut 41B is inclined at, for example, about 30 degrees to 40 degrees with respect to the lying position, and performs torque transmission in the rotational direction between the second surface side second coupling plate 2B. It has become. And the front-end | tip part (end part on the opposite side to the rocking | fulcrum fulcrum side edge part) of the strut 41B 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 31B. Similarly, the end portion on the swing fulcrum side of the strut 41B is also in surface contact with the circumferential end surface of the pocket portion 21B.

  In the pocket portion 21B, a spring member 51B that urges the strut 41B toward the standing position is disposed on the back side of the strut 41B (the side opposite to the second coupling plate 2B). In the embodiment, the spring member 51B is configured by a coil spring, but an appropriate spring such as a leaf spring can be used. In particular, in FIG. 7, when the other surface side second coupling plate 2 </ b> B rotates to the left in FIG. 7 with respect to the first coupling plate 1, the strut 41 </ b> B appropriately falls by the pressing action of the other surface side second coupling plate 2 </ b> B Thus, rotation in the other direction of the second surface side second coupling plate 2B is always allowed. On the other hand, when the other-surface-side second coupling plate 2B rotates to the right in FIG. 7 with respect to the first coupling plate 1, the strut 41B is brought into an upright position and engaged with the notch portion 31B. The rotation in one direction of the surface side second coupling plate 2B is restricted (locked). Thus, the other surface side plate-like coupling PC2 can restrict the rotation of the second surface side second coupling plate 2B in one direction.

  The other-surface-side plate-like coupling PC2 further includes a slide plate 12B, which 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. Has been. 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 one direction is restricted (see FIGS. 4, 5, and 7). ). 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. 6, FIG. 8).

  9 to 11 show the one-side plate-like coupling PC1, and the same constituent elements as those of the other-side plate-like coupling PC2 described above are represented by “A” instead of “B” used in PC2. ”Will be omitted to avoid redundant description. That is, the one-side second coupling plate is indicated by 2A, the pocket portion is indicated by reference numeral 21A, the notch portion is indicated by reference numeral 31A, the strut is indicated by reference numeral 41A, and the spring seat member is indicated by reference numeral 51A. The slide plate is indicated by reference numeral 12A. Based on the above premise, the description will be made mainly focusing on differences from the other surface side plate-like coupling PC2.

  First, in addition to the pocket portion 21A formed on one surface side of the first coupling plate 1, the number of the notch portions 31A, the struts 41A, and the spring seat members 51A is four as in the case of the other surface side plate-like coupling PC2. However, the positional relationship is 45 degrees with respect to the arrangement position of the other surface side plate-like coupling PC1. Further, the rotation restricting direction of the one-surface-side second coupling plate 2A by the strut 41A (notch portion 31A) is set to be opposite to the rotation restricting direction of the other-surface-side second coupling plate 2B. That is, FIG. 9 is drawn with the strut inclination direction set in the same manner as in FIGS. 4 and 6, whereas FIG. 9 shows the case viewed from the left side of FIG. 3. 4 and 6, the rotation restriction directions by the struts 41A and 41B on the one surface side and the other surface side seem to be the same because of the view seen from the right side of FIG. Actually, they are set to be opposite to each other.

  In the one-surface-side plate-like coupling PC1, by changing the slide position of the slide plate 12A, the two-surface rotation of the one-surface second coupling plate 2A and the rotation in the other direction (one direction) are restricted. The state is selectively switched.

  As described with reference to FIG. 2, the ring gear 134 serving as a predetermined rotating member by the two plate-like couplings PC1 and PC2 is locked in one direction (rotation restriction by the one-side plate-like coupling PC1). The direction lock state is selectively switched. That is, the ring gear 134 is brought into a one-way locked state by restricting the rotation by the one-side plate-like coupling PC1 while keeping the other-side plate-like coupling PC2 in a bidirectional free state. Further, by bringing the plate-like couplings PC1 and PC2 into the locked state, the ring gear 134 is in the bidirectionally locked state. In addition to the above, each of the plate-like couplings PC1 and PC2 is set in a bidirectional free state, so that the ring gear 134 is in a so-called neutral state in which bidirectional rotation is allowed, and rotational resistance is reduced. (In FIG. 2, in the state where “circle” is not attached to PC 1 and PC 2, the ring gear 134 is set in a bidirectional free state, and the rotation resistance, in particular, the drag resistance of the struts 41 A and 41 B is reduced. Reduced.

  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. 4, a protrusion 12b extending toward the outer side in the circumferential direction is formed on the outer edge of the slide plate 12B in the other-side plate-like coupling PC2, and an actuator 61 is attached to the protrusion 12b. It is connected. 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. Similarly, a protrusion 12a (corresponding to 12b) extending outward in the circumferential direction is formed on the outer edge portion of the slide plate 12A in the one-side plate-like coupling PC1, and the actuator 61 is attached to the protrusion 12a. It is connected. 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 one-side plate-like coupling PC1 is switched between the other-direction locked state and the bidirectional free state.

  FIG. 12 shows an example of an actuator that changes the position of each slide plate 12A, 12B between two positions. In the example of FIG. 12, the actuator is hydraulic. That is, 90 is a valve body disposed at the bottom of the transmission casing 111, and two cylinder portions 91 a and 91 b are formed in the valve body 90. A first piston 92a is disposed in the cylinder portion 91a so as to be able to reciprocate, and a second piston 92b is disposed in the cylinder portion 91b so as to be capable of reciprocating.

  The first piston 92a is urged in one direction by a spring 93a. Similarly, the second piston 92b is urged in the other direction by a spring 93b. An oil chamber 94a defined in the cylinder portion 91a by the piston 92a is connected to the pump 96 via an electromagnetic switching valve 95a. Similarly, an oil chamber 94b defined in the cylinder portion 91b by the piston 92b is connected to the pump 96 via an electromagnetic switching valve 95b. Reference numeral 97 denotes an accumulator.

  When the oil chamber 94a is connected to the pump 96 side by the switching valve 95a, the first piston 92a is moved against the spring 93a and moved to the stroke end in the other direction. When the oil chamber 94a is drained by the switching valve 95a, the first piston 92a is returned to the one-way stroke end of FIG. 12 by the spring 93a. From such a first piston 92a, an extension portion 98a extends to the outside of the valve body 90, and a recess formed in the projection portion 12a (of the slide plate 12A) with respect to a pin 99a provided on the extension portion 98a. ) Are fitted and connected. The first piston 92a 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 two positions of the slide plate 12A are also positioned. It will be done with high accuracy.

  The second piston 92b is also configured in the same manner as the first piston 92a. Therefore, by using the sign of “b” instead of the sign of “a” used for the first piston 92a, a duplicate description thereof. Is omitted. Of course, the second piston 92b is connected to the slide plate 12B.

  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). 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 components by setting their sizes and the like in common (PC2 can be configured only by changing the arrangement position of PC1, and vice versa. it can). 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. The figure which shows an other surface side plate-like coupling and the 1st coupling plate part is seen from the right side of FIG. The perspective view of FIG. The figure which slides a slide plate from the state of FIG. 4, and shows the state which made the strut a fall position. FIG. 5 is a cross-sectional view corresponding to line X10-X10 in FIG. 4. X11-X11 line equivalent sectional drawing of 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. FIG. 8 is a cross-sectional view corresponding to FIG. 7, showing a state where the strut of the one-side plate-like coupling is in an upright position. FIG. 9 is a cross-sectional view corresponding to FIG. 8, showing a state where the strut of the one-side plate-like coupling is in a lying position. 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)
12A: Slide plate (one side)
12B: Slide plate (other side)
12a: Projection (connecting part to actuator)
12b: 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 to be energized, and an annular slide plate disposed between the first coupling plate and each second coupling plate and having a hole portion and a non-hole portion;
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 one-side plate-like coupling further allows the strut to be in an upright position when the hole portion is positioned on the strut by the sliding movement of the slide plate, while the non-hole portion is attached to the strut. When set, the strut is set to be in the lying position,
The other side plate-like coupling further allows the strut to be in an upright position when the hole portion is positioned on the strut by sliding movement of the slide plate, while the non-hole portion is the strut. Set so that the strut is in the lying position when located in
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.

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