JP4175419B2 - Automatic transmission - Google Patents

Description

  The present invention relates to an automatic transmission mounted on a vehicle or the like, and more particularly to an arrangement structure of an automatic transmission that enables multi-stage shifting by allowing a reduced speed rotation to be freely input to one rotating element of a planetary gear unit.

  Generally, an automatic transmission mounted on a vehicle or the like includes a planetary gear unit in which two rows of planetary gears are connected, and a planetary gear that can output a decelerated rotation by reducing the rotation of an input shaft (for example, a patent) Reference 1 and Patent Reference 2). For example, the 6th forward speed and the 1st reverse speed can be achieved by allowing the speed reduction rotation from the planetary gear to be input to one rotation element of a planetary gear unit having four rotation elements via a clutch. is doing.

JP-A-4-125345 JP 2000-274498 A

  By the way, the automatic transmission described above is provided with a plurality of clutches for inputting rotation of the input shaft to the rotation element of the planetary gear unit and the rotation element of the planetary gear, but depending on the arrangement of the plurality of clutches. The member for transmitting the reduced rotation of the planetary gear to the rotating element of the planetary gear unit becomes longer in the axial direction. In particular, in an automatic transmission or the like used in an FF (front engine, front drive) vehicle, a so-called counter gear is a gear for outputting the output rotation of the automatic transmission to a drive wheel to another parallel shaft. Similarly, for example, the counter gear may be arranged between the planetary gear unit and the planetary gear. Depending on the arrangement of the counter gear, the member for transmitting the reduced rotation may be long in the axial direction. turn into.

  The longer the member that transmits the deceleration rotation is, the longer the member that transmits the large torque. The longer the member that can withstand the large torque is, the longer the member that is relatively thick is. This is an obstacle to making the automatic transmission compact. In addition, the weight of such a member becomes heavy, which not only hinders the weight reduction of the automatic transmission, but also increases the inertia (inertial force), resulting in a shift shock caused by reducing the controllability of the automatic transmission. There is also a possibility that it becomes easy to do.

  In view of the above, the present invention provides a reduction rotation output means having a third clutch interposed between the first rotation element and the output rotation element on one side in the axial direction of the planetary gear unit, and the first and second clutches. The planetary gear unit is disposed on the other side in the axial direction, the output member is disposed between the first and second clutches and the planetary gear unit, and the friction plate of the third clutch is disposed on the outer peripheral side of the speed reduction planetary gear. An object of the present invention is to provide an automatic transmission that solves the problem.

The present invention according to claim 1 reduces the rotation of the input shaft that rotates based on the output rotation of the drive source, the planetary gear unit that includes the first, second, third, and fourth rotating elements, and the input shaft. Reduced rotation output means capable of outputting reduced rotation to the first rotating element, a first clutch interposed between the input shaft and the second rotating element, the input shaft and the third rotation In the automatic transmission comprising a second clutch interposed between the elements and an output member for outputting the rotation of the fourth rotating element to the drive wheel transmission mechanism, the reduction rotation output means is connected to the planetary gear. The first and second clutches are arranged on one side in the axial direction of the unit, the first and second clutches are arranged on the other side in the axial direction of the planetary gear unit, and the output member is connected to the first and second clutches and the planetary gear unit. The decelerating rotation output means is disposed between and has an input rotating element that constantly inputs rotation of the input shaft, a fixed element that constantly fixes rotation, and an output rotating element that is coupled to the first rotating element. A planetary gear, and a third clutch interposed between the first rotating element and the output rotating element. The engagement of the third clutch enables output of the reduced rotation, and the deceleration The planetary gear is disposed between the hydraulic servo of the third clutch and the planetary gear unit in the axial direction. The output rotation element of the reduction planetary gear is formed of a first ring gear, and the friction of the third clutch. plate, the inner peripheral side is spline engaged to the outer peripheral side of the first ring gear of said reduction planetary gear, overlaps radially outer peripheral side of the reduction planetary gear Disposed location, the transmission path of the speed reduction rotation from the first ring gear via the friction plate of said third clutch is connected to the first rotating element with respect to the hydraulic servo of said third clutch The transmission path of the reduced speed rotation is arranged on the planetary gear unit side in the axial direction, and the drum portion of the clutch drum of the third clutch that is spline engaged with the outer peripheral side of the friction plate of the third clutch, A transmission member that engages with the tip of the drum portion of the clutch drum and is coupled to the first rotating element, and the transmission member is disposed between the speed reduction planetary gear and the planetary gear unit in the axial direction. And is rotatably supported with respect to the input shaft, and is disposed between the reduction planetary gear and the planetary gear unit in the axial direction, A disk-shaped member that rotatably supports the first ring gear with respect to the input shaft, and a bearing disposed on the reduction planetary gear side that supports an axial position of the disk-shaped member is provided in the carrier of the reduction planetary gear. On the inner peripheral side of the planetary gear unit side plate, it is arranged at a position overlapping the side plate in the radial direction .

Thus, the reduction rotation output means and the planetary gear unit can be provided, for example, without arranging the hydraulic servo and friction plate of the third clutch between them (the hydraulic servo and friction plate of the third clutch are connected between the reduction planetary gear and the planetary gear unit. Do rather), and correspondingly the side plate of the carrier of the bearing and the reduction planetary gear overlap in the radial direction between, can be placed close to, member for transmitting the reduced rotation (for example, the transmission member and the sleeve member) Can be made relatively short. As a result, the automatic transmission can be made more compact and lighter, and the inertia (inertial force) can be reduced, so that the controllability of the automatic transmission can be improved and the shift shock can be reduced. Can be reduced.

  Further, since the third clutch interposed between the first rotating element and the output rotating element connects / disconnects the output of the decelerating rotation, the decelerating rotation can be freely output to the first rotating element. However, by releasing the third clutch, for example, the rotation of the input shaft input to the input rotation element can be idled by the planetary gear. Thereby, for example, the element for fixing the rotation can be directly fixed to the case or the like without disposing the brake, and the automatic transmission can be made compact and lightweight.

According to a second aspect of the present invention, the first clutch is connected to the second rotating element through an inner peripheral side of the output member, and the second clutch is the first clutch. Are connected to the third rotating element through the outer peripheral side of the output member and the inner peripheral side of the output member.

  Thereby, the complication of the member for connection of each rotation element can be prevented, and an automatic transmission can be made compact.

According to a third aspect of the present invention, the first clutch includes a friction plate whose inner peripheral side is spline-engaged with a member connected to the second rotating element, a hydraulic servo, and an outer peripheral side of the friction plate. A first clutch drum that is spline-engaged and connected to the input shaft, a first piston that presses the friction plate, and an inner peripheral side of the first piston and the input shaft, And a first hydraulic servo hydraulic chamber formed by sealing the space between the outer peripheral side and the first clutch drum in a liquid-tight manner, and the second clutch has an inner peripheral A friction plate having a side that is spline-engaged with a member that is connected to the third rotating element, and that includes a hydraulic servo and is spline-engaged to the outer peripheral side of the friction plate and disposed on the outer peripheral side of the first clutch drum And a second connected to the input shaft It is formed by sealing the latch drum, the second piston that presses the friction plate, and the inner and outer peripheral sides of the second piston and the second clutch drum in a liquid-tight manner. And a second hydraulic servo hydraulic chamber.

  As a result, the first clutch has a structure in which the second clutch is disposed on the outer peripheral side and cannot be expanded on the outer peripheral side. However, by providing a hydraulic servo on the input shaft (for example, a boss The pressure receiving area of the hydraulic servo, particularly the first hydraulic servo hydraulic chamber, can be secured large on the inner peripheral side, and the capacity of the first clutch can be increased.

The present invention according to claim 4, before SL reduction planetary gear, the planetary gear unit, and a said output member provided on said input shaft coaxially.

  Thereby, especially when the automatic transmission is mounted on the FF vehicle, the drive wheel transmission mechanism (for example, the counter shaft portion 4) is made compact (for example, compared with the case where a reduction planetary gear or the like is provided on the other shaft). For example, interference with the vehicle body member can be prevented, and the vehicle mounting property of the automatic transmission can be improved.

According to a fifth aspect of the present invention, the boss portion to which the fixed element of the speed reduction planetary gear is fixed includes a second boss portion, and the first clutch, the second clutch, and the third clutch are: The hydraulic servo of the second clutch is disposed on a first boss portion extending from one end of the case, and the oil provided on the first boss portion. communicating with the road, the hydraulic servo of the first clutch is disposed on one end of said input shaft, an oil passage provided in the first boss portion through an oil passage provided within the input shaft to communicate, the hydraulic servo of said third clutch is disposed on the second boss portion extending from the other end of the casing, communicates with an oil passage provided in the second boss portion Configured.

  Thereby, since the hydraulic servo of the first clutch is provided on one end of the input shaft, the oil is supplied from the case to the oil passage provided in the input shaft by preventing leakage with a pair of seal rings. Thus, for example, oil can be supplied to the hydraulic servo without providing a seal ring between the input shaft and the hydraulic servo. Furthermore, the hydraulic servos of the second and third clutches can each supply oil from the boss portions extending from the case without passing through other members, for example, a pair of seal rings. By providing each, oil can be supplied. Therefore, oil can be supplied to each of the three hydraulic servos simply by providing a pair of seal rings, the sliding resistance due to the seal rings can be minimized, and the efficiency of the automatic transmission can be improved. be able to.

According to a sixth aspect of the present invention, the third clutch includes a friction plate having an inner peripheral side spline-engaged with the first ring gear of the reduction planetary gear, a hydraulic servo, and an outer peripheral side of the friction plate. A third clutch drum that engages with the spline, a third piston that presses the friction plate, and a space between the inner and outer peripheral sides of the third piston and the third clutch drum are liquid-tight. And a third hydraulic servo hydraulic chamber formed by sealing.

According to a seventh aspect of the present invention, the reduction planetary gear is a double pinion planetary gear.

  As a result, the rotation of the input shaft can be output as a reduced rotation, and even if the gear ratio of the automatic transmission is set well, the rotation elements of the planetary gear unit and the reduction planetary gear are not increased, and the rotation speed is high. Therefore, the automatic transmission can be made compact.

In the present invention according to claim 8 , the speed reduction planetary gear includes: a first carrier that is the input rotation element; a first sun gear that is the fixed element; and a first ring gear that is the output rotation element. It is configured.

  Thereby, the rotation of the input shaft can be output as a reduced rotation.

According to a ninth aspect of the present invention, the reduction planetary gear includes: a first sun gear that is the input rotation element; a first carrier that is the fixed element; and a first ring gear that is the output rotation element. It is configured.

  Thereby, the rotation of the input shaft can be output as a reduced rotation.

According to a tenth aspect of the present invention, the planetary gear unit is a Ravigneaux type planetary gear including a second sun gear, a third sun gear, a second carrier, and a second ring gear, and the first rotating element Is the second sun gear which inputs the output rotation of the deceleration rotation output means and can be fixed by locking the second brake, and the second rotating element is engaged with the first clutch. The third sun gear is configured to input rotation of the input shaft according to the third rotation element, and the third rotation element includes a long pinion that meshes with the second sun gear and a short pinion that meshes with the third sun gear. And the second carrier that can be fixed by locking the third brake and that inputs the rotation of the input shaft by the engagement of the second clutch. Rotation element is a second ring gear that meshes with the long pinion.

  Thereby, for example, although it is possible to enable the sixth forward speed and the first reverse speed, the reduction rotation output means and the planetary gear unit can be arranged close to each other to transmit the reduction rotation. The member can be made relatively short.

The present invention according to claim 11 includes a first one-way clutch that is arranged in parallel with the third brake and restricts the rotation of the second carrier in one direction.

  As a result, for example, the first forward speed at the time of positive drive can be achieved by the engagement of the first clutch and the first one-way clutch. For example, the first forward speed when switching from the non-travel range to the travel range is achieved. It can be done smoothly.

According to a twelfth aspect of the present invention, the third brake and the first one-way clutch are arranged on the outer peripheral side of the planetary gear unit.

  Thereby, (for example, compared with the case where the first one-way clutch is disposed adjacent to the first clutch, the portion where the first and second clutches are disposed can be made compact in the axial direction. For example, the output member can be brought closer to the torque converter side. Thereby, a drive wheel transmission mechanism part (especially counter shaft part) can be compactized with respect to an axial direction.

In the present invention according to claim 13 , the vertical axis indicates the number of rotations of each of the first, second, third, and fourth rotating elements, and the horizontal axis indicates the first, second, third, and second. In the velocity diagram shown in correspondence with the gear ratio of the rotating element of 4, the first rotating element to which the decelerated rotation is input is made to correspond to the vertical axis of the lateral end, and the third rotating element in order. The rotation element is configured to correspond to the fourth rotation element and the second rotation element connected to the output member.

  As a result, as shown in the speed diagram, the 6th forward speed and the 1st reverse speed can be achieved, but the reduction rotation output means and the planetary gear unit can be arranged close to each other, and the reduction rotation is transmitted. The member for doing so can be made relatively short. As a result, the automatic transmission can be made more compact and lighter, and the inertia (inertial force) can be reduced, so that the controllability of the automatic transmission can be improved and the shift shock can be improved. Can be reduced.

According to a fourteenth aspect of the present invention, the first forward speed is achieved by engagement of the first clutch and the third brake, and the second forward speed is achieved by engagement of the first clutch and the second brake. The first forward speed is achieved by engaging the first clutch and the second clutch by setting the engaged state of the first clutch and outputting the decelerated rotation from the reduced rotation output means. Engagement of the second clutch and the second brake is achieved by setting the forward speed to a state in which the second clutch is engaged and the decelerated rotation output means can output the decelerated rotation. Thus, the sixth forward speed is achieved by engaging the third brake and outputting the decelerated rotation from the decelerated rotation output means.

  As a result, the sixth forward speed and the first reverse speed are achieved, and both the first and second clutches are engaged with the fourth forward speed, that is, the direct forward state is established at the fourth forward speed. The gear ratio at the fifth forward speed and the sixth forward speed can be set high. Especially when mounted on a vehicle, the engine speed can be lowered and the vehicle can run at high speed. This can contribute to the quietness of the vehicle.

According to a fifteenth aspect of the present invention, the planetary gear unit includes a second sun gear, a second carrier, a first simple planetary gear having a second ring gear, a third sun gear, a third carrier, and a third ring gear. And the first rotating element is the third ring gear that inputs the output rotation of the reduction planetary gear and can be fixed by locking the second brake, The second rotating element can be fixed by locking the third brake, and the third carrier and the second ring gear for inputting the rotation of the input shaft by the engagement of the first clutch. And the third rotating element includes the second sun gear and the third sun gear that input rotation of the input shaft by engagement of the second clutch. Ri, the fourth rotating element is the second carrier meshing with said second sun gear and said second ring gear.

  Thereby, for example, although it is possible to enable the sixth forward speed and the first reverse speed, the reduction rotation output means and the planetary gear unit can be arranged close to each other to transmit the reduction rotation. The member can be made relatively short.

The present invention according to claim 16 includes a first one-way clutch that is arranged in parallel with the third brake and restricts the rotation of the third carrier and the second ring gear in one direction. .

  Thereby, for example, the first forward speed at the time of positive drive can be achieved by the engagement of the second clutch and the first one-way clutch. For example, the first forward speed when switching from the non-travel range to the travel range is achieved. It can be done smoothly.

The present invention according to claim 17 is configured by disposing the third brake and the first one-way clutch on the outer peripheral side of the planetary gear unit.

  Thereby, (for example, compared with the case where the first one-way clutch is arranged adjacent to the second clutch, the portion where the first and second clutches are arranged can be made compact in the axial direction. For example, the output member can be brought closer to the torque converter side. Thereby, a drive wheel transmission mechanism part (especially counter shaft part) can be compactized with respect to an axial direction.

The present invention according to claim 18 is configured by integrally forming an inner race of the first one-way clutch and the second ring gear.

  Thereby, for example, the automatic transmission can be made compact while achieving the first forward speed when the non-traveling range is switched to the traveling range.

The present invention according to claim 19 includes a second one-way clutch that is arranged in parallel with the second brake and restricts the rotation of the third ring gear in one direction by the locking of the fourth brake. Is done.

  Thereby, for example, the shift from the second forward speed to the third forward speed can be smoothly performed.

According to a twentieth aspect of the present invention, the vertical axis indicates the number of rotations of each of the first, second, third, and fourth rotating elements, and the horizontal axis indicates the first, second, third, and second. In the velocity diagram shown in correspondence with the gear ratio of the rotation element of 4, the first rotation element to which the reduced rotation is input is made to correspond to the vertical axis of the lateral end, and the third rotation element in order. The rotating element is configured to correspond to the fourth rotating element and the second rotating element connected to the output member.

  As a result, as shown in the speed diagram, the 6th forward speed and the 1st reverse speed can be achieved, but the reduction rotation output means and the planetary gear unit can be arranged close to each other, and the reduction rotation is transmitted. The member for doing so can be made relatively short. As a result, the automatic transmission can be made more compact and lighter, and the inertia (inertial force) can be reduced, so that the controllability of the automatic transmission can be improved and the shift shock can be improved. Can be reduced.

According to a twenty-first aspect of the present invention, the first forward speed is achieved by engagement of the second clutch and the third brake, and the second forward speed is achieved by engagement of the second clutch and the second brake. The third forward speed is achieved by engaging the second clutch and outputting the decelerated rotation from the decelerated rotation output means, and the forward fourth speed is achieved by engaging the first clutch and the second clutch. Engaging the first clutch and the second brake by setting the first gear to a state in which the first clutch is engaged and the decelerated rotation output means can output decelerated rotation. Thus, the sixth forward speed is achieved by engaging the third brake and outputting the decelerated rotation from the decelerated rotation output means, thereby achieving the first reverse speed.

  As a result, the sixth forward speed and the first reverse speed are achieved, and both the first and second clutches are engaged with the fourth forward speed, that is, the direct forward state is established at the fourth forward speed. The gear ratio at the fifth forward speed and the sixth forward speed can be set high. Especially when mounted on a vehicle, the engine speed can be lowered and the vehicle can run at high speed. This can contribute to the quietness of the vehicle.

According to a twenty-second aspect of the present invention, the drive wheel transmission mechanism includes a differential portion that outputs rotation to the drive wheel, and a counter shaft portion that engages with the differential portion, and the output member includes the counter A counter gear meshing with the shaft portion.

  Thereby, an automatic transmission can be mounted on, for example, an FF vehicle.

<First Reference Example>
Hereinafter, a first reference example will be described with reference to FIGS. 1 is a developed sectional view showing an automatic transmission according to a first reference example, FIG. 2 is a sectional view showing an automatic transmission mechanism of the automatic transmission according to the first reference example, and FIG. 3 is a first reference example. FIG. 4 is an operation table of the automatic transmission according to the first reference example, and FIG. 5 is a speed diagram of the automatic transmission according to the first reference example.

Automatic transmission 1 ₁ according to the first reference example, a suitably used especially FF (front engine, front drive) in a vehicle, as shown in FIG. 1, a case 3 consisting of a housing case 3a and a transmission case 3b A torque converter 12 in the housing case 3a, an automatic transmission mechanism 2 _{1 in} the transmission case 3b, a counter shaft portion (drive wheel transmission mechanism) 4, and a differential portion (drive wheel transmission mechanism) 5. Has been placed. The torque converter 12, for example the engine is disposed on an axis centered on the output shaft 10 and the automatic transmission mechanism 2 ₁ of the input shaft 20 is coaxially (not shown), the automatic speed change mechanism 2 _1, The engine is disposed on an output shaft 10, that is, an axis centered on a central axis 30 that is coaxial with the input shaft 20. Further, the counter shaft portion 4 is disposed on a counter shaft 52 that is on an axis parallel to the input shaft 20 and the central axis 30, and the differential portion 5 is not shown on an axis parallel to the counter shaft 52. Are arranged in a form having left and right axles.

1 is a developed plan view of the automatic transmission ₁₁ , and includes the input shaft 20, the central shaft 30, the counter shaft 52, and left and right (not shown). An axle is a positional relationship in the shape of a letter when viewed from the side, and in particular, reference numeral 12 ′ in FIG.

A disk-shaped member 11 is disposed on the output shaft 10 of the engine, and the outer peripheral side of the disk-shaped member 11 is connected to a pump impeller 12 a of the torque converter 12. Further, the turbine runner 12b of the torque converter 12 is connected to a damper device 13 that absorbs torque fluctuation on the inner peripheral side thereof, and the outer peripheral side of the damper device 13 is engageable with the pump impeller 12a. is connected to the up clutch piston member 14 further piston member 14 is connected to the automatic speed change mechanism 2 ₁ of the input shaft 20. That is, in a state where the piston member 14 is not engaged with the pump impeller 12a, engine torque (not shown) is transmitted to the input shaft 20 via the torque converter 12, and the piston member 14 is connected to the pump impeller 12a. In this state, the output shaft 10 and the input shaft 20 are directly connected, and the engine torque is directly transmitted to the input shaft 20.

Next, it will be explained with reference to FIG. 2 for the automatic speed change mechanism 2 _1. As shown in FIG. 2, a spline 20 s is formed on the inner peripheral side of one end of the input shaft 20 opposite to the torque converter 12, and the spline is formed on one outer peripheral side of the center shaft 30. The input shaft 20 and the central shaft 30 are connected in the rotational direction by engaging with 30s. On the central shaft 30, a planetary gear unit PU and a planetary gear (reduction rotation output means, reduction planetary gear) PR are provided. The planetary gear unit PU includes four rotating elements: a sun gear (second rotating element, third sun gear) S2, a carrier (third rotating element, second carrier) CR2, a ring gear (fourth rotating element, second gear). 2 ring gear) R2 and sun gear (first rotating element, second sun gear) S3, long pinion PL supported by side plates 42, 44 and meshed with sun gear S3 and ring gear R2 on carrier CR2. These are so-called Ravigneaux type planetary gears that have a short pinion PS that is supported by the side plates 43 and 44 and meshes with the sun gear S2 so as to mesh with each other. The planetary gear PR includes a pinion P1 and a sun gear (fixed element, first sun gear) S1 that mesh with a carrier (input rotation element, first carrier) CR1 and a ring gear R1 (output rotation element, first ring gear). This is a so-called double pinion planetary gear having pinions P2 meshing with each other.

  On the input shaft 20, on the inner peripheral side, a hydraulic servo 62, a friction plate 72, a hub member 22 forming a clutch drum (first clutch drum) and a drum-like member 21, and a hub member connected to the sun gear S2. A multi-plate clutch (first clutch) C1 having a (member connected to the second rotating element) 23, and a hydraulic servo 61, a friction plate 71, and a clutch drum (second clutch drum) on the outer peripheral side thereof. A multi-plate clutch (second clutch) C2 having a hub member 24 and a cylinder member 61e to be formed and a hub member 25 connected to the carrier CR2 is disposed.

  The hydraulic servo 62 includes a piston member (first piston) 62b for pressing the friction plate 72, a drum-shaped member 21 having a cylinder portion 62e, and a seal ring between the piston member 62b and the cylinder portion 62e. An oil chamber (first hydraulic servo oil chamber) 62a formed by being sealed by 62f and 62g, a return spring 62c that urges the piston member 62b toward the oil chamber 62a, and a return spring 62c And a return plate 62d for receiving the biasing force. The oil chamber 62a communicates with oil passages 20a and 20b formed in the input shaft 20. The oil passage 20a extends to one end of the case 3 and is provided in a sleeve shape on the input shaft 20. It communicates with the oil passage 91 of the boss 3c. The oil passage 91 communicates with a hydraulic control device (not shown). That is, since the hydraulic servo 62 is disposed on the input shaft 20, a pair of seal rings 81 that seal between the boss 3 c of the case 3 and the input shaft 20 prevent the hydraulic servo device from being illustrated. An oil passage to the oil chamber 62a is configured.

  The hydraulic servo 61 includes a piston member (second piston) 61b for pressing the friction plate 71, a cylinder member 61e, and seal rings 61f and 61g between the piston member 61b and the cylinder member 61e. A sealed oil chamber (second hydraulic servo hydraulic chamber) 61a, a return spring 61c for biasing the piston member 61b in the direction of the oil chamber 61a, and a bias of the return spring 61c are received. And a return plate 61d. The oil chamber 61a communicates with an oil passage 92 of the boss portion 3c, and the oil passage 92 communicates with a hydraulic control device (not shown). That is, in the hydraulic servo 61, an oil path from a hydraulic control device (not shown) to the oil chamber 61a is configured by a pair of seal rings 80 that seal between the boss 3c of the case 3 and the cylinder member 61e. Yes.

  That is, the drum-shaped member 21 is connected to the input shaft 20, and the hub member 22 is connected to the outer peripheral side of the drum-shaped member 21. A clutch C1 that can be engaged by a hydraulic servo 62 for the clutch C1 is arranged on the inner peripheral side of the front end portion of the hub member 22 so as to be spline-engaged. The inner peripheral side of the clutch C1 is the hub member 23. Are connected in a splined manner. The inner peripheral side of the hub member 23 is connected to one end of a sleeve member 26 (member connected to the second rotating element) 26 rotatably provided on the central shaft 30. The sun gear S2 is integrally formed on the outer peripheral side of the end of the end.

  Further, on the outer peripheral side of the front end portion of the hub member 22, a clutch C2 that can be engaged by the hydraulic servo 61 for the clutch C2 is arranged in a splined manner, and on the outer peripheral side of the clutch C2, The drum-like member 24 is connected so as to be spline-engaged on the inner peripheral side thereof. A one-way clutch (first one-way clutch) F3 is disposed between one end (right side in the figure) of the drum-shaped member 24 and the transmission case 3b, and the drum member 24 is rotated. Regulating in one direction. A connecting member 25 is connected to the inner peripheral side of the other end (left side in the figure) of the drum-like member in a spline engagement manner, and is connected to the side plate 44 of the carrier CR2.

  On the other hand, on the central shaft 30, a hydraulic servo 66, a friction plate 76, a hub member 32 and a drum-like member 31 forming a clutch drum (third clutch drum), and a hub member 33 connected to the carrier CR1 are provided. A multi-plate clutch (third clutch, decelerated rotation output means) C3 is arranged. The hydraulic servo 66 is sealed by a piston member 66b for pressing the friction plate 76, a drum-like member 31 having a cylinder portion 66e, and seal rings 66f and 66g between the piston member 66b and the cylinder portion 66e. The oil chamber 66a is formed, a return spring 66c that biases the piston member 66b in the direction of the oil chamber 66a, and a return plate 66d that receives the bias of the return spring 66c. The clutch drum including the hub member 32 and the drum-shaped member 31 is open in the direction of the planetary gear PR, and the planetary gear PR is disposed between the hydraulic servo 66 and the planetary gear unit PU in the axial direction. Further, the friction plate 76 is disposed at a position overlapping the radially outer diameter side of the planetary gear PR.

  The oil chamber 66a extends to the other end of the case 3 opposite to the boss portion 3c, and communicates with an oil passage 93 of a boss portion 3d provided in a sleeve shape on the central shaft 30. The oil passage 93 communicates with a hydraulic control device (not shown). That is, the hydraulic servo 66 is connected from a hydraulic control device (not shown) to the oil chamber 66a by a pair of seal rings 82 that seals between the boss 3d of the case 3 and the drum-like member 61 having the cylinder 66e. An oil passage is constructed.

  That is, a drum-shaped member 31 is connected to the central shaft 30 connected to the input shaft 20 on the side opposite to the input shaft 20 (left side in the figure). A hub member 32 is connected to the outer peripheral side. A clutch C3 that can be engaged by a hydraulic servo 66 for the clutch C3 is arranged on the inner peripheral side of the tip of the hub member 32 in a spline engagement manner, and on the inner peripheral side of the clutch C3, The extended portion of the side plate 33 of the carrier CR1 is arranged so as to engage with the spline. The carrier CR1 has the pinion P1 and the pinion P2 supported by the side plate 33 and the side plate 34. The pinion P2 is formed in a sleeve shape and is rotatably arranged on the shaft. It meshes with the sun gear S1. A hub member 35 is connected to one end of the sun gear S1. A hydraulic servo 65 for the brake B1 and a friction plate 75 are provided on the outer peripheral side of the hub member 35, and can be locked by the hydraulic servo 65. A multi-plate brake (first brake) B1 is arranged so that its friction plate 75 is spline-engaged. The outer peripheral side of the friction plate 75 of the brake B1 is spline-engaged with a spline 3s formed on the inner peripheral side of the transmission case 3b.

The pinion P1 meshes with the ring gear R1 as described above, and is rotatably supported on the central shaft 30 at one end on the inner peripheral side of the ring gear R1, and transmits the rotation of the ring gear R1. transmission member (reduced rotation output means) 40 ₁ is connected. Opposite the portion connected to said transmission member 40 ₁ of the ring gear R1 in (right side in the drawing) has a spline 40s is formed on the outer peripheral side thereof, the said splines 40s, (left in the drawing with) the hub member 46 at the side is splined, (in the figure right side) the sleeve member 41 ₁ is splined. A brake (second brake) B2 that has a hydraulic servo 64 for the brake B2 and a friction plate 74 on the outer peripheral side of the hub member 46 and can be locked by the hydraulic servo 64 is a friction plate. 74 is arranged so as to engage with the spline, and the outer peripheral side of the friction plate 74 of the brake B2 is connected to the spline 3s formed on the inner peripheral side of the transmission case 3b in the same manner as the brake B1. Match.

The inner peripheral side of the sleeve member 41 ₁ is the sun gear S3 is formed integrally with the planetary gear unit PU, to the sun gear S1 is supported by the side plate 42 and the side plate 44 of the carrier CR2 as described above The long pinion PL is engaged. Further, the short pinion PS is supported between the side plate 44 and the side plate 43 as described above, and the hub member 47 is connected to the outer peripheral side of the side plate 43. A brake (third brake) B4 that has a brake B4 hydraulic servo 63 and a friction plate 73 on the outer peripheral side of the hub member 47 and can be locked by the brake B4 hydraulic servo 63 is provided. The friction plate 73 is arranged so as to be spline-engaged, and the outer peripheral side of the friction plate 73 of the brake B4 is formed on the inner peripheral side of the transmission case 3b, similar to the brake B1 and the brake B2. The spline is engaged with the spline 3s.

  As described above, the ring gear R2 meshes with the long pinion PL. A connecting member 45 is connected to one end of the ring gear R2, and the ring gear R2 is connected to the counter gear 50 via the connecting member 45. It is connected to. As shown in FIG. 1, the counter gear 50 is engaged with a gear 51 fixed on the counter shaft 52 of the counter shaft portion 4. The counter shaft 52 is formed on the outer peripheral surface. The gear 53 of the differential portion 5 is engaged with the gear 52a. The gear 53 is fixed to a housing 54, and the housing 54 is connected to a left and right axle (not shown) via a differential gear 55.

  As described above, the clutch C1 and the clutch C2 are disposed on the input shaft 20, and the counter gear 50, the planetary gear unit PU, and the planetary gear PR are sequentially disposed on the center shaft 30, that is, the axial direction of the planetary gear unit PU. The planetary gear PR is disposed on one side, the clutch C1 and the clutch C2 are disposed on the other side in the axial direction, and the counter gear 50 is disposed between the clutch C1 and the clutch C2 and the planetary gear unit PU. The clutch C3 and the brake B1 are arranged on the outer peripheral side of the planetary gear PR, and the brake B2 and the brake B4 are arranged on the outer peripheral side of the planetary gear unit PU, respectively. The planetary gear PR, the planetary gear unit PU, and the counter gear 50 are configured to be coaxial with the input shaft 20.

Subsequently, based on the above configuration, Figure 3 the operation of the automatic transmission 1 ₁ will be described with reference to FIGS. In the velocity diagram shown in FIG. 5, the vertical axis indicates the number of rotations of each rotating element, and the horizontal axis indicates the gear ratio of these rotating elements. Further, in the planetary gear unit PU of the velocity diagram, the vertical axis at the lateral end (right side in FIG. 5) is the sun gear S3, and the vertical axis is the carrier CR2 and the ring gear in order from the left side to the subsequent figures. It corresponds to R2 and sun gear S2.

  As shown in FIG. 3, the rotation of the input shaft 20 is input to the sun gear S2 when the clutch C1 is engaged. The rotation of the input shaft 20 is input to the carrier CR2 when the clutch C2 is engaged, and the rotation of the carrier CR2 is freely fixed by the locking of the brake B4. The one-way clutch F3 Therefore, the rotation in one direction is restricted.

On the other hand, the rotation of the input shaft 20 is input to the carrier CR1 when the clutch C3 is engaged, and the rotation of the sun gear S1 is freely fixed by the locking of the brake B1. The ring gear R1, the transmission member 40 ₁ and the sleeve member 41 ₁ is connected to the sun gear S3, the ring gear R1 and the sun gear S3 is rotated is freely fixed by the locking of the brake B2. The rotation of the ring gear R2 is output to the counter gear 50, and is output to a drive wheel (not shown) via the counter gear 50, the counter shaft portion 4 and the differential portion 5 (see FIG. 1).

  At the first forward speed in the D (drive) range, as shown in FIG. 4, the clutch C1 and the one-way clutch F3 are engaged. Then, as shown in FIG. 5, the rotation of the input shaft 20 is input to the sun gear S2 via the clutch C1, and the rotation of the carrier CR2 is restricted in one direction (forward rotation direction). Reverse rotation is prevented and the state is fixed. Then, the rotation of the input shaft 20 input to the sun gear S2 is output to the ring gear R2 via the fixed carrier CR2, and the forward rotation as the first forward speed is output from the counter gear 50. At this time, in the planetary gear PR, the decelerated rotation reverse to the ring gear R1 is output via the sun gear S3, and the sun gear S1 is fixed by the locking of the brake B1, but the clutch C3 is released. The carrier CR1 is idling and no torque is transmitted. During engine braking (coasting), the brake B4 is locked to fix the carrier CR2, and the forward first speed state is maintained in such a manner as to prevent the carrier CR2 from rotating forward.

  In the first forward speed, the one-way clutch F3 prevents the carrier CR2 from rotating in the reverse direction and enables forward rotation, so that, for example, achieving the first forward speed when switching from the non-traveling range to the traveling range. Can be smoothly performed by automatic engagement of the one-way clutch. The one-way clutch F3 is configured to receive the rotation of the input shaft 20 via the sun gear S2, and has a smaller torque that acts, for example, than when receiving the decelerated rotation. Therefore, the one-way clutch F3 and the one-way clutch There is no need to increase the size of the drum-like member 24 that connects F3 and the clutch C2.

  At the second forward speed in the D (drive) range, as shown in FIG. 4, the clutch C1 is engaged and the brake B2 is locked. Then, as shown in FIG. 5, the rotation of the input shaft 20 is input to the sun gear S2 via the clutch C1, and the sun gear S3 is fixed by the locking of the brake B2. As a result, the carrier CR2 is slightly decelerated and rotated, and the rotation of the input shaft 20 input to the sun gear S2 is output to the ring gear R2 via the decelerated carrier CR2, and the forward rotation as the second forward speed is performed. Output from the counter gear 50. At this time, in the planetary gear PR, the sun gear S3 and the ring gear R1 are fixed by the locking of the brake B2, and the clutch C3 is released, so that the carrier CR1 and the sun gear S1 are stopped.

At the third forward speed in the D (drive) range, as shown in FIG. 4, the clutch C1 and the clutch C3 are engaged, and the brake B1 is locked. Then, as shown in FIG. 5, the rotation of the input shaft 20 is input to the carrier CR1 via the clutch C3 and the sun gear S2 via the clutch C1, and the sun gear S1 is fixed by the locking of the brake B1. The Thereby, rotation of the input shaft 20 input to the carrier CR1, the ring gear R1 is reduced speed by the fixed sun gear S1, the reduced-speed rotation to the sun gear S3 via the transmitting member 40 ₁ and the sleeve member 41 ₁ Is output. As a result, the rotation of the input shaft 20 input to the sun gear S2 and the reduced rotation of the sun gear S3 cause the carrier CR2 to rotate at a slightly lower speed than the reduced rotation of the sun gear S3. Then, the rotation of the input shaft 20 input to the sun gear S2 is output to the ring gear R2 via the carrier CR2 for decelerating rotation, and the forward rotation as the third forward speed is output from the counter gear 50. At this time, since the sun gear S3 and the ring gear R1 are reduced rotation, the transmission member 40 ₁ and the sleeve member 41 ₁ has been relatively large torque transmission.

  In the fourth forward speed in the D (drive) range, as shown in FIG. 4, the clutch C1 and the clutch C2 are engaged. Then, as shown in FIG. 5, the rotation of the input shaft 20 is input to the sun gear S2 via the clutch C1 and to the carrier CR2 via the clutch C2. As a result, the rotation of the input shaft 20 input to the sun gear S2 and the rotation of the input shaft 20 input to the carrier CR2 are brought into a directly coupled rotation state, and the rotation of the input shaft 20 is directly output to the ring gear R2. Forward rotation as the fourth forward speed is output from the counter gear 50. At this time, in the planetary gear PR, the rotation of the input shaft 20 is input to the carrier CR1 through the clutch C3, and the rotation (direct rotation) of the input shaft 20 from the sun gear S3 is input to the ring gear R1. The brake B1 is released, the sun gear S1 is idling, and no torque is transmitted.

At the fifth forward speed in the D (drive) range, as shown in FIG. 4, the clutch C2 and the clutch C3 are engaged, and the brake B1 is locked. Then, as shown in FIG. 5, the rotation of the input shaft 20 is input to the carrier CR1 via the clutch C3 and the carrier CR2 via the clutch C2, and the sun gear S1 is fixed by the locking of the brake B1. The Thereby, rotation of the input shaft 20 input to the carrier CR1, the ring gear R1 is reduced speed by the fixed sun gear S1, the reduced-speed rotation to the sun gear S3 via the transmitting member 40 ₁ and the sleeve member 41 ₁ Is output. Then, the decelerated rotation of the sun gear S3 and the carrier CR2 to which the rotation of the input shaft 20 is input are output at an increased speed and output to the ring gear R2, and the forward rotation as the fifth forward speed is output from the counter gear 50. Is done. At this time, similarly to the state of the third forward speed, because the sun gear S3 and the ring gear R1 are reduced rotation, the transmission member 40 ₁ and the sleeve member 41 ₁ has been relatively large torque transmission .

  At the sixth forward speed in the D (drive) range, as shown in FIG. 4, the clutch C2 is engaged and the brake B2 is locked. Then, as shown in FIG. 5, the rotation of the input shaft 20 is input to the carrier CR2 via the clutch C2, and the sun gear S3 is fixed by the locking of the brake B2. As a result, the rotation of the input shaft 20 input to the carrier CR2 and the fixed sun gear S2 result in an increased speed rotation (greater than the fifth forward speed) and output to the ring gear R2 as the sixth forward speed. Is output from the counter gear 50. At this time, in the planetary gear PR, as in the state of the second forward speed, the sun gear S3 and the ring gear R1 are fixed by the locking of the brake B2, and the clutch C3 is released, so that the carrier CR1 The sun gear S1 is in a stopped state.

In the first reverse speed in the R (reverse) range, as shown in FIG. 4, the clutch C3 is engaged, and the brake B1 and the brake B4 are locked. Then, as shown in FIG. 5, the rotation of the input shaft 20 is input to the carrier CR1 via the clutch C3, and the sun gear S1 is fixed by the locking of the brake B1, and the carrier CR2 is fixed by the locking of the brake B4. The Thereby, rotation of the input shaft 20 input to the carrier CR1, the ring gear R1 is reduced speed by the fixed sun gear S1, the reduced-speed rotation to the sun gear S3 via the transmitting member 40 ₁ and the sleeve member 41 ₁ Is output. Then, the decelerated rotation of the sun gear S3 and the fixed carrier CR2 are output as the reverse rotation to the ring gear R2, and the reverse rotation as the first reverse speed is output from the counter gear 50. At this time, similarly to the state of the third forward speed and the fifth forward speed, because the sun gear S3 and the ring gear R1 are reduced rotation, the transmission member 40 ₁ and the sleeve member 41 ₁ is relatively large torque I am communicating.

  At this time, the brake B4 is configured to receive the rotation of the sun gear S3 to which the decelerated rotation is input. However, the brake B4 is disposed relatively close on the outer peripheral side of the planetary gear unit PU. The hub member 47 that transmits torque based on rotation can be made relatively short.

In the P (parking) range and the N (neutral) range, in particular, the clutch C1, the clutch C2, and the clutch C3 are disengaged, the power transmission between the input shaft 20 and the counter gear 50 is in a disconnected state, and automatic shifting is performed. mechanism becomes idle state (neutral state) as 2 ₁ overall. Incidentally, the brake B1 for fixing the sun gear S1 is engaged, this is intended to prevent the repetition of frequent locking and releasing of the brakes B1, especially other rotation of the automatic speed change mechanism 2 ₁ It does not affect the rotation state of the element.

In the automatic transmission ₁₁ , the clutch C3 is engaged in the third forward speed, the fifth forward speed, and the first reverse speed as described above, and the rotation of the input shaft 20 is applied to the carrier CR1. However, the present invention is not limited to this, and the clutch C3 is interposed between the ring gear R1 and the sun gear S3 so that the carrier CR1 is always connected to the input shaft 20, and the third forward speed, the fifth forward speed, and it is engaged with the clutch C3 in the state of one reverse speed stage, similarly the planetary gear PR, the clutch C3, and the reduced rotation can be output to the sun gear S3 by the transmission member 40 _1, likewise six forward It is possible to obtain a first gear and a reverse gear. However, the clutch C3 at this time is for connecting / disconnecting the reduced speed rotation, and it is necessary to connect / disconnect a larger torque than that of the above-described embodiment for connecting / disconnecting the rotation of the input shaft 20. It needs to be relatively large.

As described above, according to the automatic transmission 1 ₁ according to the reference example, the planetary gear PR as the reduced rotation output unit, the clutch C3, and the transmission member 40 ₁ a one axial side of the planetary gear unit PU (FIG. 1, and 2 The clutch C1 and the clutch C2 are arranged on the other side in the axial direction of the planetary gear unit PU (the right side in FIGS. 1, 2 and 3), and a counter as an output member is arranged. Since the gear 50 is disposed between the clutch C1 and the clutch C2 and the planetary gear unit PU, in particular, the planetary gear PR and the planetary gear unit PU can be disposed close to each other, and the transmission member 40 for transmitting the reduced speed rotation. ₁ and it can be relatively short axial length of the sleeve member 41 _1. For thereby, compactness of the automatic transmission 1 ₁ can enable weight reduction, which can further reduce the inertia (the inertia force) by weight of the transmission member 40 ₁ and the sleeve member 41 _1, it is possible to improve the controllability of the automatic transmission 1 _1, it is possible to reduce the generation of shift shock.

The clutch C2 is because it is connected to the carrier CR2 through the outer peripheral side of the clutch C1, the complicated members for connecting the respective rotary elements can be prevented, the automatic transmission 1 ₁ can be made compact.

  Further, the clutch C1 has a structure in which the clutch C2 is disposed on the outer peripheral side thereof and cannot be expanded in diameter on the outer peripheral side. However, by providing the hydraulic servo 62 on the input shaft 20 (for example, on the boss portion 3c). The pressure receiving area of the hydraulic servo 62, in particular, the oil chamber 62a for the hydraulic servo 62 can be secured large on the inner peripheral side, and the capacity of the clutch C1 can be increased.

Further, the planetary gear PR, the planetary gear unit PU, and so providing the counter gear 50 to the input shaft 20 coaxially, particularly when the automatic transmission 1 ₁ is mounted in the FF vehicle, etc. on the other axis (eg reduction planetary gear can be compact compared with) the drive wheel transmission mechanism (for example, the counter shaft portion 4, etc.) in the case of providing, for example, it is possible to prevent interference with the vehicle body member, the vehicle mountability of the automatic transmission 1 ₁ Can be improved.

Further, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2001-263438, when the clutch C3 is interposed between the ring gear R1 and the sun gear S3, it is necessary to connect and disconnect the reduced speed rotation, which is relatively large. Although it becomes a thing and the space between the planetary gear PR and the planetary gear unit PU spreads, the connection / disconnection of rotation of the input shaft 20 by the clutch C3 is provided by interposing between the input shaft 20 and the carrier CR1. Thus, the reduced speed rotation output from the ring gear R1 of the planetary gear PR is connected / disconnected, so that the clutch C3 can be made compact and the planetary gear PR and the planetary gear unit PU can be arranged relatively close to each other. Thereby it is possible to compact the automatic transmission 1 _1.

Further, since the hydraulic servo 62 is provided on the input shaft 20, leakage is prevented from the case 3 by a pair of seal rings 81 and oil is supplied to the oil passages 20 a and 20 b provided in the input shaft 20. Thus, for example, oil can be supplied to the oil chamber 62 a of the hydraulic servo 62 without providing a seal ring between the input shaft 20 and the hydraulic servo 62. Furthermore, the hydraulic servos 61 and 66 can supply oil from the boss portions 3c and 3d extending from the case 3, respectively, without passing through other members, for example, a pair of seal rings 80. , 82 can be provided to supply oil. Accordingly, oil can be supplied to the hydraulic servos 62, 61, 66 simply by providing a pair of seal rings 81, 80, 82, respectively, and the sliding resistance by the seal rings can be minimized. thereby, it is possible to improve the efficiency of the automatic transmission 1 _1.

Further, since the friction plate 76 is disposed radially outer peripheral side of the planetary gear PR, it can be made compact automatic transmission 1 ₁ axially. Further, the planetary gear PR and the planetary gear unit PU can be disposed adjacent to each other by disposing the planetary gear PR between the hydraulic servo 66 of the clutch C3 and the planetary gear unit PU (the hydraulic servo of the clutch C3). 66 because it is not between the planetary gear PR and the planetary gear unit PU), it can be relatively short transmission member 40 ₁ and the sleeve member 41 _1. Thereby, compactness of the automatic transmission 1 ₁ can enable weight reduction, further, it is possible to reduce the inertia (the inertia force), it is possible to improve the controllability of the automatic transmission 1 ₁ And the occurrence of shift shock can be reduced.

Further, the planetary gear PR is because the double-pinion planetary gear, it is possible to output a reduced rotation to rotation of the input shaft 20, also the gear ratio of the automatic transmission 1 ₁ as set better, the planetary gear unit, the reduction planetary gear without increasing the respective rotating elements, because it can also suppress the high rotation, it is possible to make the automatic transmission 1 ₁ compact.

  Further, the planetary gear PR is configured to include a carrier CR1 that is an input rotation element, a sun gear S1 that is a fixed element, and a ring gear R1 that is an output rotation element, so that the rotation of the input shaft 20 is reduced. Can be output.

Further, the planetary gear unit PU is a Ravigneaux type planetary gear constituted by the sun gear S2, the sun gear S3, the carrier CR2, and the ring gear R2. while, it is possible can be arranged in close proximity to the planetary gear PR and the planetary gear unit PU, is relatively short transmission member 40 ₁ and the sleeve member 41 ₁ for transmitting the reduced rotation.

  Further, since the one-way clutch F3 that is arranged in parallel with the brake B4 and restricts the rotation of the carrier CR2 in one direction is provided, the first forward speed during the positive drive can be achieved by the engagement of the clutch C1 and the one-way clutch F3. Therefore, for example, it is possible to smoothly achieve the first forward speed when switching from the non-traveling range to the traveling range.

Further, since the brake B4 is disposed on the outer peripheral side of the planetary gear unit PU and the one-way clutch F3 is disposed adjacent to the clutch C2, the one-way clutch F3 is engaged together with the clutch C1 that inputs the rotation of the input shaft when the first forward speed is achieved. On the other hand, since the brake B4 achieves the first reverse speed by engaging with the clutch C3 for connecting / disconnecting the deceleration rotation, the reaction torque acting on the brake B4 is: It becomes larger than the reaction force torque acting on the one-way clutch F3. Therefore, by providing the brake B4 close to the outer peripheral side of the planetary gear unit PU, the hub member 47 that transmits the torque based on the reduced speed rotation to the brake B4 can be made relatively short. Furthermore, even if the one-way clutch F3 is provided close to the clutch C2 that is distant from the planetary gear unit PU, it is not necessary to enlarge the hub member 25 and the side plate 44 that connect the clutch C2 and the carrier CR2. Further, the degree of freedom in designing the brake can be increased by not disposing the one-way clutch F3 on the outer periphery of the planetary gear unit PU. Thereby, downsizing of the automatic transmission 1 ₁ may allow weight reduction.

In addition, as shown in the speed diagram, the planetary gear PR and the planetary gear unit PU can be arranged close to each other to achieve the sixth forward speed and the first reverse speed, and the transmission that transmits the reduced speed rotation can be achieved. it can be relatively short member 40 ₁ and the sleeve member 41 _1. Thereby, compactness of the automatic transmission 1 ₁ can enable weight reduction, further, it is possible to reduce the inertia (the inertia force), it is possible to improve the controllability of the automatic transmission 1 ₁ And the occurrence of shift shock can be reduced.

  Further, the sixth forward speed and the first reverse speed are achieved, and both the clutches C1 and C2 are engaged with the fourth forward speed, that is, the direct forward state is established at the fourth forward speed. The gear ratio at the 6th forward speed can be set high, and especially when mounted on a vehicle, the engine speed can be lowered in a vehicle that travels at a high vehicle speed. It can contribute to silence.

Further, as a drive wheel transmission mechanism, a counter gear that has a differential portion 5 that outputs rotation to the drive wheel and a counter shaft portion 4 that engages with the differential portion 5, and an output member meshes with the counter shaft portion 4. since it is, it is possible to mount the automatic transmission 1 ₁ for example, FF vehicle.

<Second Reference Example>
Hereinafter, a second reference example in which the first reference example is partially changed will be described with reference to FIGS. 6 is a developed sectional view showing an automatic transmission according to a second reference example, FIG. 7 is a sectional view showing an automatic transmission mechanism of an automatic transmission according to a second reference example, and FIG. 8 is a second reference example. FIG. 9 is an operation table of the automatic transmission according to the second reference example, and FIG. 10 is a speed diagram of the automatic transmission according to the second reference example. In the second reference example, the same reference numerals are given to the same parts as those in the first reference example, except for some changes, and the description thereof is omitted.

As shown in FIG. 6, the automatic transmission 1 ₂ according to the second reference example, (see FIG. 1) to the automatic transmission 1 ₁ of the first reference example, the planetary gear unit PU and the planetary gear (reduced rotation output The one-way clutch (second one-way clutch) F2 is disposed between the vehicle and the speed reduction planetary gear) PR, and the brake (fourth brake) B3 for connecting / disengaging the one-way clutch F2 is disposed. .

As shown in FIG. 7, the transmission member 40 ₂ connected to the ring gear R1 of the planetary gear PR, the sun gear S3 of the planetary gear unit PU is engaged the sleeve member 41 ₂ and splines are formed integrally. Further, the sleeve member 41 _2, one inner race-way clutch F2 is formed integrally with the outer race of the one-way clutch F2 is integrally formed with the hub member 48. On the outer peripheral side of the hub member 48, there is provided a brake (fourth brake) B3 having a brake B3 hydraulic servo 67 and a friction plate 77 and being freely engageable by the brake B3 hydraulic servo 67. The friction plate 77 is arranged so as to engage with the spline, and the outer peripheral side of the friction plate 77 of the brake B3 is engaged with the spline 3s formed on the inner peripheral side of the transmission case 3b. . Incidentally, the hub member 46 spline-engaged with the brake B2 is spline engaged to the sleeve member 41 ₂ on the inner circumferential side, i.e., it is connected to the transmitting member 40 ₂ via the sleeve member 41 ₂ .

Subsequently, on the basis of the above-described configuration, Fig. 8 the operation of the one-way clutch F2 of the automatic transmission 1 ₂ will be described with reference to FIGS. As in the first reference example, in the velocity diagram shown in FIG. 10, the vertical axis indicates the rotational speed of each rotating element, and the horizontal axis indicates the gear ratio of these rotating elements. ing. Further, in the planetary gear unit PU portion of the velocity diagram, the vertical axis at the end in the lateral direction (right side in FIG. 10) is the sun gear S3, and thereafter, the vertical axis is the carrier CR2 and the ring gear in order to the left side in the figure. It corresponds to R2 and sun gear S2.

As shown in FIG. 8, the one-way clutch F2 is disposed in parallel with the brake B2, the sleeve member 41 2 by the locking of the brake _B3, that is the ring gear R1 via the sun gear S3, and the transmission member 40 ₂ Rotation is restricted to one direction (forward rotation direction).

  Then, as shown in FIG. 9, at the second forward speed in the D (drive) range, the clutch C1 is engaged, and the one-way clutch F2 is engaged by engaging the brake B3. Then, as shown in FIG. 10, the rotation of the input shaft 20 is input to the sun gear S2 via the clutch C1, and the rotation of the sun gear S3 is performed in one direction (forward rotation) by the one-way clutch F2 by engaging the brake B3. The rotation of the sun gear S3 is prevented. As a result, the carrier CR2 is slightly decelerated and rotated, and the rotation of the input shaft 20 input to the sun gear S2 is output to the ring gear R2 via the decelerated carrier CR2, and the forward rotation as the second forward speed is performed. Output from the counter gear 50. At this time, in the planetary gear PR, the sun gear S3 and the ring gear R1 are prevented from rotating in reverse by the one-way clutch F2, and the clutch C3 is released, so that the carrier CR1 and the sun gear S1 are in a stopped state.

  The shift from the first forward speed to the second forward speed is performed by engaging the brake B3 and the one-way clutch F2 preventing the reverse rotation of the sun gear S3, so that the sun gear S2 rotates forward and is engaged at the first forward speed. Since it is automatically released by the combined one-way clutch F3, for example, the engine can be prevented from being blown up and smoothly shifted to the second forward speed. Further, at the time of engine braking (coasting), the brake B2 provided in parallel with the one-way clutch F2 is locked to fix the sun gear S3 (and the ring gear R1) to prevent forward rotation of the sun gear S3. Thus, the state of the second forward speed is maintained.

As described above, according to the automatic transmission 1 ₂ according to the reference example, the planetary gear PR as the reduced rotation output unit, the clutch C3, and the transmission member 40 ₂ in the axial direction one side of the planetary gear unit PU (FIG. 6, 7 and The clutch C1 and the clutch C2 are arranged on the other axial side of the planetary gear unit PU (the right side in FIGS. 6, 7 and 8), and a counter as an output member is arranged. Since the gear 50 is disposed between the clutch C1 and the clutch C2 and the planetary gear unit PU, in particular, the planetary gear PR and the planetary gear unit PU can be disposed close to each other, and the transmission member 40 for transmitting the reduced speed rotation. ₂ and it can be relatively short in the axial length of the sleeve member 41 _2. For thereby, compactness of the automatic transmission 1 _2, it is possible to allow the weight reduction, which can further reduce the inertia (the inertia force) by weight of the transmission member 40 ₂ and the sleeve member 41 _2, it is possible to improve the controllability of the automatic transmission 1 _2, it is possible to reduce the generation of shift shock.

The clutch C2 is because it is connected to the carrier CR2 through the outer peripheral side of the clutch C1, the complicated members for connecting the respective rotary elements can be prevented, the automatic transmission 1 ₂ can be made compact.

  Further, the clutch C1 has a structure in which the clutch C2 is disposed on the outer peripheral side thereof and cannot be expanded in diameter on the outer peripheral side. However, by providing the hydraulic servo 62 on the input shaft 20 (for example, on the boss portion 3c). The pressure receiving area of the hydraulic servo 62, in particular, the oil chamber 62a for the hydraulic servo 62 can be secured large on the inner peripheral side, and the capacity of the clutch C1 can be increased.

Further, the planetary gear PR, the planetary gear unit PU, and so providing the counter gear 50 to the input shaft 20 coaxially, particularly when the automatic transmission 1 ₂ mounted in the FF vehicle, etc. on the other axis (eg reduction planetary gear can be compact compared with) the drive wheel transmission mechanism (for example, the counter shaft portion 4, etc.) in the case of providing, for example, it is possible to prevent interference with the vehicle body member, the vehicle mountability of the automatic transmission 1 ₂ Can be improved.

Similarly to the first reference example, if the clutch C3 is interposed between the ring gear R1 and the sun gear S3, it is necessary to connect / disconnect the decelerated rotation, which becomes relatively large, and the planetary gear. Although the space between the PR and the planetary gear unit PU expands, the output from the ring gear R1 of the planetary gear PR is caused by the connection / disconnection of the rotation of the input shaft 20 by the clutch C3 by being interposed between the input shaft 20 and the carrier CR1. Therefore, the clutch C3 can be made compact, and the planetary gear PR and the planetary gear unit PU can be arranged relatively close to each other. Thereby it is possible to compact the automatic transmission 1 _2.

Further, since the hydraulic servo 62 is provided on the input shaft 20, leakage is prevented from the case 3 by a pair of seal rings 81 and oil is supplied to the oil passages 20 a and 20 b provided in the input shaft 20. Thus, for example, oil can be supplied to the oil chamber 62 a of the hydraulic servo 62 without providing a seal ring between the input shaft 20 and the hydraulic servo 62. Furthermore, the hydraulic servos 61 and 66 can supply oil from the boss portions 3c and 3d extending from the case 3, respectively, without passing through other members, for example, a pair of seal rings 80. , 82 can be provided to supply oil. Accordingly, oil can be supplied to the hydraulic servos 62, 61, 66 only by providing a pair of seal rings 81, 80, 82, respectively, and the sliding resistance by the seal rings can be minimized. thereby, it is possible to improve the efficiency of the automatic transmission 1 _2.

Further, since the friction plate 76 is disposed radially outer peripheral side of the planetary gear PR, it can be made compact automatic transmission 1 ₂ in the axial direction. Further, the planetary gear PR and the planetary gear unit PU can be disposed adjacent to each other by arranging the planetary gear PR between the hydraulic servo 66 of the clutch C3 and the planetary gear unit PU (the hydraulic servo of the clutch C3). 66 because it is not between the planetary gear PR and the planetary gear unit PU), it can be relatively short transmission member 40 ₂ and the sleeve member 41 _2. Thereby, compactness of the automatic transmission 1 _2, it is possible to allow the weight reduction, further, it is possible to reduce the inertia (the inertia force), is possible to improve the controllability of the automatic transmission 1 ₂ And the occurrence of shift shock can be reduced.

Further, the planetary gear PR is because the double-pinion planetary gear, it is possible to output a reduced rotation to rotation of the input shaft 20, also the gear ratio of the automatic transmission 1 ₂ as set better, the planetary gear unit, the reduction planetary gear without increasing the respective rotating elements, because it can also suppress the high rotation, it is possible to make the automatic transmission 1 ₂ compact.

  Further, the planetary gear PR is configured to include a carrier CR1 that is an input rotation element, a sun gear S1 that is a fixed element, and a ring gear R1 that is an output rotation element, so that the rotation of the input shaft 20 is reduced. Can be output.

Further, the planetary gear unit PU is a Ravigneaux type planetary gear constituted by the sun gear S2, the sun gear S3, the carrier CR2, and the ring gear R2. while, it is possible can be arranged in close proximity to the planetary gear PR and the planetary gear unit PU, is relatively short transmission member 40 ₂ and the sleeve member 41 ₂ that transmits the reduced rotation.

  Further, since the one-way clutch F3 that is arranged in parallel with the brake B4 and restricts the rotation of the carrier CR2 in one direction is provided, the first forward speed during the positive drive can be achieved by the engagement of the clutch C1 and the one-way clutch F3. Therefore, for example, it is possible to smoothly achieve the first forward speed when switching from the non-traveling range to the traveling range.

Further, since the brake B4 is disposed on the outer peripheral side of the planetary gear unit PU and the one-way clutch F3 is disposed adjacent to the clutch C2, the one-way clutch F3 is engaged together with the clutch C1 that inputs the rotation of the input shaft when the first forward speed is achieved. On the other hand, since the brake B4 achieves the first reverse speed by engaging with the clutch C3 for connecting / disconnecting the deceleration rotation, the reaction torque acting on the brake B4 is: It becomes larger than the reaction force torque acting on the one-way clutch F3. Therefore, by providing the brake B4 close to the outer peripheral side of the planetary gear unit PU, the hub member 47 that transmits the torque based on the reduced speed rotation to the brake B4 can be made relatively short. Furthermore, even if the one-way clutch F3 is provided close to the clutch C2 that is distant from the planetary gear unit PU, it is not necessary to enlarge the hub member 25 and the side plate 44 that connect the clutch C2 and the carrier CR2. Further, the degree of freedom in designing the brake can be increased by not disposing the one-way clutch F3 on the outer periphery of the planetary gear unit PU. Thereby, downsizing of the automatic transmission 1 _2, may allow weight reduction.

  In addition, since the one-way clutch F2 that is arranged in parallel with the brake B2 and restricts the rotation of the sun gear S3 in one direction by the locking of the brake B3 is provided, the shift from the second forward speed to the third forward speed is smoothly performed. It can be carried out.

Moreover, since forming the inner race and the sleeve member 41 _{and second} one-way clutch F2 together, yet one which can smoothly perform a shift to the third forward speed from the forward second speed, automatic transmission 1 ₂ Can be made compact particularly in the radial direction.

Further, as shown in the speed diagram, the planetary gear PR and the planetary gear unit PU can be arranged close to each other, while being able to achieve the sixth forward speed and the first reverse speed, the transmission for transmitting the reduced speed rotation. it can be relatively short member 40 ₂ and the sleeve member 41 _2. Thereby, compactness of the automatic transmission 1 _2, it is possible to allow the weight reduction, further, it is possible to reduce the inertia (the inertia force), is possible to improve the controllability of the automatic transmission 1 ₂ And the occurrence of shift shock can be reduced.

  Further, the sixth forward speed and the first reverse speed are achieved, and both the clutches C1 and C2 are engaged with the fourth forward speed, that is, the direct forward state is established at the fourth forward speed. The gear ratio at the 6th forward speed can be set high, and especially when mounted on a vehicle, the engine speed can be lowered in a vehicle that travels at a high vehicle speed. It can contribute to silence.

Further, as a driving wheel transmission mechanism, a counter gear that has a differential portion 5 that outputs rotation to the driving wheel and a counter shaft portion 4 that engages with the differential portion 5, and an output member meshes with the counter shaft portion 4. since it is, it is possible to mount the automatic transmission 1 ₂ for example in the FF vehicle.

<First Embodiment>
A first embodiment in which the first and second reference examples are partially changed will be described below with reference to FIGS. FIG. 11 is a cross-sectional view showing an automatic transmission mechanism of an automatic transmission according to the first embodiment, FIG. 12 is a skeleton diagram showing the automatic transmission according to the first embodiment, and FIG. 13 is a diagram of the first embodiment. FIG. 14 is a speed diagram of the automatic transmission according to the first embodiment. In the first embodiment, the same reference numerals are given to the same parts as those in the first reference example except for the changed parts, and the description thereof is omitted.

As shown in FIG. 11, the automatic transmission 1 ₃ according to the first embodiment, the automatic transmission 1 _1, 1 ₂ of the first and second reference example (see FIGS. 1 and 6) The automatic transmission mechanism 2 is changed. Automatic speed change mechanism 2 _3, like the automatic speed change mechanism 2 _1, 2 ₂ of the first and second reference example, one end of the opposite side of the torque converter 12 of the input shaft 20 (see FIGS. 1 and 6) on its inner and spline 20s is formed on the peripheral side, engages the splines 30s formed on one outer circumferential side of the central axis 30 _3, i.e. the input shaft 20 and the central axis 30 ₃ in the rotational direction It is connected. It said center on shaft 30 ₃ has the planetary gear unit PU and the planetary gear (reduced rotation output means, the speed reduction planetary gear) and PR.

  The planetary gear unit PU is composed of a first simple planetary gear SP2 and a second simple planetary SP3. As four rotation elements, sun gears (third rotation element, first rotation) are connected via a sleeve 127 described later. 2 sun gear) S2 and sun gear (third rotating element, third sun gear) S3, carrier (second rotating element, third carrier) CR3 and ring gear (second rotating element) connected by side plate 143 , A second ring gear) R2, a ring gear (first rotating element, third ring gear) R3, and a carrier (fourth rotating element, second carrier) CR2 are so-called Simpson type planetary gears. The planetary gear PR includes a pinion P1a and a sun gear (fixed element, first sun gear) S1 that mesh with a carrier (input rotation element, first carrier) CR1 and a ring gear (output rotation element, first ring gear) R1. This is a so-called double pinion planetary gear having pinions P1b meshing with each other.

On the input shaft 20, a hydraulic servo 161, a friction plate 172, a cylinder member 161 e forming a clutch drum (second clutch drum), a drum-shaped member 122, and a hub member connected to a sleeve member 127 on the outer peripheral side. A multi-plate clutch (second clutch) C1 having (a member connected to the third rotating element) 125, and a hydraulic servo 162, a friction plate 171 and a clutch drum (first clutch drum) on the inner peripheral side thereof a cylinder member 162e and a drum-shaped member 124, the hub member multi-plate clutch having a (second member coupled to the rotating element) 123, (the first clutch) C2 which is connected to the sleeve member 126 ₃ forms a, but Has been placed.

  The hydraulic servo 161 includes a piston member (second piston) 161b for pressing the friction plate 172, a cylinder member 161e to which rotation of the input shaft 20 is input by spline engagement with a cylinder member 162e described later, An oil chamber (second hydraulic servo hydraulic chamber) 161a formed by sealing between the piston member 161b and the cylinder member 161e by seal rings 161f and 161g, and the piston member 161b in the direction of the oil chamber 161a A return spring 161c that urges the return spring 161 and a return plate 161d that receives the urge of the return spring 161c. The oil chamber 161a extends to one end of the case 3 and communicates with an oil passage 192 of a boss portion (first boss portion) 3c provided in a sleeve shape on the input shaft 20, and the oil passage 192 communicates with a hydraulic control device (not shown). That is, in the hydraulic servo 161, an oil path from a hydraulic control device (not shown) to the oil chamber 161a is configured by a pair of seal rings 80 that seal between the boss 3c of the case 3 and the cylinder member 161e. Yes.

  The hydraulic servo 162 includes a piston member (first piston) 162b for pressing the friction plate 171, a cylinder member 162e fixed to the input shaft 20, and the piston member 162b and the cylinder member 162e. An oil chamber (first hydraulic servo hydraulic chamber) 162a formed by being sealed by seal rings 162f and 162g, a return spring 162c for urging the piston member 162b toward the oil chamber 162a, And a return plate 162d that receives the bias of the return spring 162c. The oil chamber 162a communicates with oil passages 20a and 20b formed in the input shaft 20, and the oil passage 20a communicates with the oil passage 191 of the boss portion 3c. The oil passage 191 communicates with a hydraulic control device (not shown). That is, since the hydraulic servo 162 is disposed on the input shaft 20, a pair of seal rings 81 that seal between the boss 3 c of the case 3 and the input shaft 20 are used to prevent the hydraulic servo 162 from being shown from the hydraulic control device (not shown). An oil passage to the oil chamber 162a is configured.

That is, the cylinder member 161e is connected to the input shaft 20 via the cylinder member 162e, and the drum-shaped member 122 is connected to the outer peripheral side of the cylinder member 161e. A friction plate 172 of the clutch C1 that is freely engageable by the hydraulic servo 161 for the clutch C1 is disposed on the inner peripheral side of the front end of the drum-like member 122 so as to be spline-engaged. The inner peripheral side of the plate 172 is connected to the hub member 125 in a spline engagement. Then, the inner peripheral side of the hub member 125 is connected to one end of the sleeve member 127 rotatably provided on the central axis 30 _3, the sun gear S2 and the sun gear S3 to the sleeve member 127 outer peripheral side integrally Is formed.

A drum-shaped member 124 is connected to the outer peripheral side of the cylinder member 162e, and a clutch that can be engaged by a hydraulic servo 162 for the clutch C2 is connected to the inner peripheral side of the tip end portion of the drum-shaped member 124. The friction plate 171 of C2 is arranged so as to engage with the spline, and the inner peripheral side of the friction plate 171 of the clutch C2 is connected to the hub member 123 so as to engage with the spline. Then, the inner peripheral side of the hub member 123 is connected to one end of the sleeve member 126 rotatably provided on the central axis 30 _3, spline 126s to the distal end portion outer peripheral side of the other end of the sleeve member 126 is formed, the side plate 142 ₃ via a spline 142s of side plates 142 ₃ of the carrier CR3 is connected.

On the other hand, the case 3, and the the boss portion 3c extended in the opposite other end, on the boss portion (second boss) 3d ₃ having a sleeve-like member 131 ₃ which is fixed, the hydraulic servo 166 A multi-plate clutch (decelerated rotation output means, third clutch) C3 having a friction plate 176 and a clutch drum (third clutch drum) 132 having a cylinder portion 166e is disposed. The hydraulic servo 166 includes a piston member 166b for pressing the friction plate 176, an oil chamber 166a formed by being sealed by seal rings 166f and 166g between the piston member 166b and the cylinder portion 166e, A return spring 166c that urges the piston member 166b in the direction of the oil chamber 166a and a return plate 166d that receives the urge of the return spring 166c are configured. The clutch drum 132 is opened in the direction of the planetary gear PR, and the planetary gear PR is disposed between the axial direction of the hydraulic servo 166 and the planetary gear unit PU. Further, the friction plate 176 is disposed at a position overlapping the radially outer diameter side of the planetary gear PR.

Oil chamber 166a communicates with the oil passage 193 of the boss portion 3d _3, the oil passage 193 communicates with the hydraulic control apparatus (not shown). That is, the hydraulic servo 166, the seal ring 182 and a pair of sealing between the drum-shaped member 132 having a boss portion 3d ₃ and the cylinder portion 166e of the case 3, the hydraulic control apparatus (not shown) to an oil chamber 166a The oil passage is configured.

  The friction plate 176 is spline-engaged with the inner peripheral side of the clutch drum 132 of the clutch C3, and the inner peripheral side of the friction plate 176 is spline-engaged with the ring gear R1, that is, the clutch is engaged by the clutch C3. The drum 132 and the ring gear R1 are freely engageable. A brake (second brake) B2 having a hydraulic servo 164 and a friction plate 174 is disposed on the outer peripheral side of the clutch drum 132, and the outer peripheral side of the friction plate 174 is on the inner periphery of the transmission case 3b. The spline is engaged with the formed spline 3s, and the inner peripheral side of the friction plate 174 is spline engaged with the outer peripheral side of the tip end portion of the clutch drum 132. That is, the clutch drum 132 is locked by the brake B2. It is free.

To the ring gear R1 is the side plate 133 _3, the side plate 134 _3, and their side plate ₁₃₃ 3, 134 ₃ supported pinions P1a, the carrier CR1 has a P1b (refer to FIG. 12), via a pinion P1a meshes, side plate 134 _3, fixed to the intermediate shaft 30 ₃ (input rotation always input) is. Further, the carrier CR1 is a sun gear S1 that is spline engaged with nonrotatable (always fixed) to the boss portion 3d ₃ of the case 3 as described above, it meshes via a pinion P1b. Incidentally, the ring gear R1 is rotatably supported on the intermediate shaft 30 ₃ by a disc-shaped member 135 _3.

Then, the tip inner peripheral side of the clutch drum 132 is rotatably supported via a side plate ₁₄₂₃ of the sleeve member 126 ₃ and the carrier CR3 on the central axis 30 _3, transmits the rotation of the clutch drum 132 transmission member (reduced rotation output means) 140 ₃ are connected. The substantially middle portion of said transmission member 140 _3, the ring gear R3 of the second simple planetary SP3 of the planetary gear unit PU is fixed.

  A one-way clutch (second one-way clutch) F2 is disposed on the outer peripheral side of the ring gear R3, and the inner race 141 of the one-way clutch F2 is spline-engaged with the outer peripheral side of the ring gear R3. A brake (fourth brake) B3 having a hydraulic servo 167 and a friction plate 177 is disposed on the outer peripheral side of the outer race 148 of the one-way clutch F2, and the inner peripheral side of the friction plate 177 is the outer periphery side of the outer race 148. The race 148 is spline-engaged, and the outer peripheral side of the friction plate 177 is spline-engaged with a spline 3s formed on the inner periphery of the transmission case 3b, that is, the outer race 148 can be locked by the brake B3. It has become.

Further, the inner peripheral side of the ring gear R3 is splined to and side plates 142 ₃ to the sleeve member 126 ₃ As described above, the side plates 143, and have their side plate ₁₄₂ 3, 143 pinion P3 supported in The carrier CR3 meshes with the pinion P3, and the carrier CR3 meshes with the sun gear S3 formed on the sleeve member 127 via the pinion P3. The side plate 143 of the carrier CR3 is spline-engaged with the ring gear R2 of the first simple planetary SP2 of the planetary gear unit PU.

  The ring gear R2 itself forms an inner race of the one-way clutch F3, and a one-way clutch (first one-way clutch) F3 is disposed on the outer peripheral side of one end of the ring gear R2. The race is spline-engaged with a spline 3s formed on the inner periphery of the mission case 3b. Also, a brake (third brake) B4 having a hydraulic servo 163 and a friction plate 173 is disposed on the outer peripheral side of the other end of the ring gear R2, and the inner peripheral side of the friction plate 173 is fixed to the ring gear R2. The hub member 147 is spline-engaged, and the outer peripheral side of the friction plate 173 is spline-engaged with a spline 3s formed on the inner periphery of the transmission case 3b. That is, the ring gear R2 can be locked by the brake B4. It has become.

  Further, on the inner peripheral side of the ring gear R2, a carrier CR2 having a side plate 144, a side plate 145, and a pinion P2 supported by the side plates 144, 145 is meshed with the pinion P2. The carrier CR2 meshes with a sun gear S2 formed on the sleeve member 127 via the pinion P2. The carrier CR2 is connected to the counter gear 50 through the side plate 145.

The said counter gear 50, similarly to the automatic transmission 1 _1, 1 ₂ shown in FIG. 1 or FIG. 6, for example, a gear 51 fixed on the countershaft 52 of the countershaft portion 4 meshes with, The counter shaft 52 meshes with the gear 53 of the differential portion 5 via a gear 52a formed on the outer peripheral surface. The gear 53 is fixed to a housing 54, and the housing 54 is connected to a left and right axle (not shown) via a differential gear 55.

As described above, are arranged the clutch C1 and the clutch C2 is on the input shaft 20, the counter gear 50 in the central shaft 30 on _3, and the planetary gear unit PU, the planetary gear PR is arranged in order, i.e., the axis of the planetary gear unit PU A planetary gear PR is disposed on one side in the direction, a clutch C1 and a clutch C2 are disposed on the other side in the axial direction, and a counter gear 50 is disposed between the clutch C1 and the clutch C2 and the planetary gear unit PU. The clutch C3 and the brake B2 are disposed on the outer peripheral side of the planetary gear PR, and the brake B3 and the brake B4 are disposed on the outer peripheral side of the planetary gear unit PU, respectively. Further, the planetary gear PR, the planetary gear unit PU, and the counter gear 50 are configured so as to be coaxial with the input shaft 20.

Subsequently, based on the above configuration, FIG. 12 will be described with reference to FIGS. 13 and 14 the operation of the automatic transmission 1 _3. In the velocity diagram shown in FIG. 14, the vertical axis indicates the number of rotations of each rotary element, and the horizontal axis indicates the gear ratio of these rotary elements. Further, in the planetary gear unit PU of the velocity diagram, the vertical axis at the lateral end (right side in FIG. 14) is the ring gear R3, and the vertical axes in the order from the left to the right in the figure are the ring gear R2 and the carrier. It corresponds to CR3, carrier CR2, sun gear S2, and sun gear S3.

  As shown in FIG. 12, the rotation of the input shaft 20 is input to the sun gear S2 and the sun gear S3 when the clutch C1 is engaged. The rotation of the input shaft 20 is input to the carrier CR3 and the ring gear R2 when the clutch C2 is engaged, and the rotation of the carrier CR2 and the ring gear R2 can be fixed by the locking of the brake B4. In addition, rotation in one direction is restricted by the one-way clutch F3.

On the other hand, the carrier CR1, the rotation of the input shaft 20 via the intermediate shaft 30 ₃ is input, the sun gear S1 is rotated is fixed to the case 3, the ring gear R1, to the carrier CR1 The motor rotates at a reduced speed based on the input rotation of the input shaft 20. The aforementioned ring gear R3, by the clutch C3 is engaged, the reduced rotation of the ring gear R1 is input via the transmission member 140 _3. The ring gear R3 is restricted in rotation in one direction by a one-way clutch F3 that acts by locking the brake B3, and can be fixed by rotation of the brake B2. The rotation of the ring gear R2 is output to the counter gear 50, and is output to a driving wheel (not shown) via the counter gear 50, the counter shaft portion 4 and the differential portion 5 (see FIG. 1 or FIG. 6). The

At the first forward speed in the D (drive) range, as shown in FIG. 13, the clutch C1 and the one-way clutch F3 are engaged. Then, as shown in FIG. 5, the rotation of the input shaft 20 is input to the sun gear S2 and the sun gear S3 via the clutch C1, and the rotation of the carrier CR3 and the ring gear R2 is restricted to one direction (forward rotation direction). In other words, the reverse rotation of the ring gear R2 is prevented and fixed. Then, the rotation of the input shaft 20 input to the sun gear S2 and the fixed ring gear R2 output a decelerated rotation to the carrier CR2, and the forward rotation as the first forward speed is output from the counter gear 50. At this time, in the planetary gear PR, the reduced rotation is output to the ring gear R3 by the carrier CR1 to which the rotation of the input shaft 20 is input and the fixed sun gear S1, but since the clutch C3 is released, in particular the transmission member 140 ₃ is not performed the torque transmission. Further, at the time of engine braking (coasting), the brake B4 is locked to fix the ring gear R2, and the forward first speed state is maintained by preventing the ring gear R2 from rotating forward.

  In the first forward speed, the one-way clutch F3 prevents the reverse rotation of the ring gear R2 and allows the forward rotation, so that, for example, the first forward speed when switching from the non-travel range to the travel range is achieved. Can be smoothly performed by the automatic engagement of the one-way clutch F3.

At the second forward speed in the D (drive) range, as shown in FIG. 13, the clutch C1 and the one-way clutch F2 are engaged. Then, as shown in FIG. 14, the rotation of the input shaft 20 is input to the sun gear S2 and the sun gear S3 via the clutch C1, and the rotation of the ring gear R3 is restricted in one direction (forward rotation direction), that is, The ring gear R3 is prevented from rotating in reverse and is fixed. Then, the rotation of the input shaft 20 input to the sun gear S3 and the rotation of the input shaft 20 input to the sun gear S2 are output to the carrier CR3 and the ring gear R2 by the fixed ring gear R3, and the rotation of the input shaft 20 and the ring gear R2 As a result of the decelerated rotation input to, a decelerated rotation greater than the first forward speed is output to the carrier CR2, and the forward rotation as the second forward speed is output from the counter gear 50. Also in this case, in the planetary gear PR, the reduced rotation is output to the ring gear R3 by the carrier CR1 to which the rotation of the input shaft 20 is input and the fixed sun gear S1, but since the clutch C3 is released, the transmission is particularly transmitted. is not performed torque transmitted to member 140 _3. Further, at the time of engine braking (coasting), the brake B2 is locked to fix the ring gear R3, and the forward second speed state is maintained by preventing the ring gear R3 from rotating forward.

  The shift from the first forward speed to the second forward speed is performed by engaging the brake B3 and the one-way clutch F2 preventing the reverse rotation of the ring gear R3, so that the carrier CR3 and the ring gear R2 are rotated forward and the first forward speed. Since it is automatically released by the one-way clutch F3 engaged at the stage, for example, the engine can be prevented from being blown up and smoothly shifted to the second forward speed.

At the third forward speed in the D (drive) range, as shown in FIG. 13, the clutch C1 and the clutch C3 are engaged. Then, as shown in FIG. 14, the rotation of the input shaft 20 is input to the carrier CR1, and the ring gear R1 is decelerated and rotated by the fixed sun gear S1. Further, by the engagement of the clutch C3, the reduced rotation of the ring gear R1 to the ring gear R3 via the transmission member 140 ₃ is input. On the other hand, the rotation of the input shaft 20 is input to the sun gear S3, and a slightly large reduced rotation is output to the carrier CR3 and the ring gear R2 due to the rotation of the input shaft 20 input to the sun gear S3 and the reduced rotation of the ring gear R3. Then, the rotation of the input shaft 20 input to the sun gear S2 and the slightly larger reduction rotation input to the ring gear R2 output a reduction rotation larger than the second forward speed to the carrier CR2, and the third forward speed. Is output from the counter gear 50. At this time, since the ring gear R1 and the ring gear R3 are reduced rotation, the transmission member 140 ₃ is subjected to relatively large torque transmission.

At the fourth forward speed in the D (drive) range, as shown in FIG. 13, the clutch C1 and the clutch C2 are engaged. Then, as shown in FIG. 14, the rotation of the input shaft 20 is input to the sun gear S2 and the sun gear S3 via the clutch C1, and to the carrier CR3 and the ring gear R2 via the clutch C2. As a result, the rotation of the input shaft 20 input to the sun gear S2 and the rotation of the input shaft 20 input to the ring gear R2, that is, a direct connection rotation state, and the rotation of the input shaft 20 is directly output to the carrier CR2. Forward rotation as the fourth forward speed is output from the counter gear 50. Also in this case, in the planetary gear PR, the reduced rotation is output to the ring gear R3 by the carrier CR1 to which the rotation of the input shaft 20 is input and the fixed sun gear S1, but since the clutch C3 is released, the transmission is particularly transmitted. is not performed torque transmitted to member 140 _3.

At the fifth forward speed in the D (drive) range, the clutch C2 and the clutch C3 are engaged, as shown in FIG. Then, as shown in FIG. 14, the rotation of the input shaft 20 is input to the carrier CR1, and the ring gear R1 is decelerated and rotated by the fixed sun gear S1. Further, by the engagement of the clutch C3, the reduced rotation of the ring gear R1 to the ring gear R3 via the transmission member 140 ₃ is input. On the other hand, the rotation of the input shaft 20 is input to the carrier CR3 and the ring gear R2, and the rotation of the input shaft 20 input to the carrier CR3 and the reduction rotation of the ring gear R3 cause the sun gear S3 and the sun gear S3 to rotate at an increased speed. The output rotation is output to the carrier CR2 by the rotation of the input shaft 20 input to the ring gear R2 and the increased rotation input to the sun gear S2, and the forward rotation as the fifth forward speed is counter gear. 50. At this time, similarly to the state of the third forward speed, the ring gear R1 and the ring gear R3 are reduced rotation, the transmission member 140 ₃ is subjected to relatively large torque transmission.

At the sixth forward speed in the D (drive) range, the clutch C2 is engaged and the brake B2 is locked, as shown in FIG. Then, as shown in FIG. 14, the rotation of the input shaft 20 is input to the carrier CR3 and the ring gear R2 via the clutch C2, and the ring gear R3 is fixed by the locking of the brake B2. As a result, the rotation of the input shaft 20 input to the carrier CR3 and the fixed ring gear R3 result in increased rotation (greater than the fifth forward speed) and output to the sun gear S3 and the sun gear S2, and the ring gear R2 The rotation of the input shaft 20 input to the speed and the speed-up rotation input to the sun gear S2 cause the carrier CR2 to output a speed-up rotation larger than the fifth forward speed, and the forward rotation as the sixth forward speed is countered. Output from the gear 50. Also in this case, in the planetary gear PR, the reduced rotation is output to the ring gear R3 by the carrier CR1 to which the rotation of the input shaft 20 is input and the fixed sun gear S1, but since the clutch C3 is released, the transmission is particularly transmitted. is not performed torque transmitted to member 140 _3.

At the first reverse speed in the R (reverse) range, the clutch C3 is engaged and the brake B4 is locked, as shown in FIG. Then, as shown in FIG. 14, the rotation of the input shaft 20 is input to the carrier CR1, and the ring gear R1 is decelerated and rotated by the fixed sun gear S1. Further, by the engagement of the clutch C3, the reduced rotation of the ring gear R1 to the ring gear R3 via the transmission member 140 ₃ is input. On the other hand, the rotation of the carrier CR3 and the ring gear R2 is fixed by the locking of the brake B4, and the reverse rotation is output to the sun gear S3 and the sun gear S3 by the decelerated rotation of the fixed carrier CR3 and the ring gear R3. Then, the reverse rotation is output to the carrier CR2 by the reverse rotation input to the sun gear S2, and the reverse rotation as the first reverse speed is output from the counter gear 50. At this time, similarly to the state of the third forward speed and the fifth forward speed, the ring gear R1 and the ring gear R3 are reduced rotation, the transmission member 140 ₃ is subjected to relatively large torque transmission .

In the P (parking) range and the N (neutral) range, in particular, the clutch C1, the clutch C2, and the clutch C3 are disengaged, the power transmission between the input shaft 20 and the counter gear 50 is in a disconnected state, and automatic shifting is performed. mechanism becomes idle state (neutral state) as 2 ₃ overall.

As described above, according to the automatic transmission 1 ₃ according to the present invention, the planetary gear PR as the reduced rotation output unit, the clutch C3, and the transmission member 140 ₃ a one axial side of the planetary gear unit PU (FIGS. 11 and 12 in The clutch C1 and the clutch C2 are arranged on the other side in the axial direction of the planetary gear unit PU (the right side in FIGS. 11 and 12), and the counter gear 50 as an output member is arranged on the clutch C1 and because it disposed between the clutch C2 and the planetary gear unit PU, in particular close to the planetary gear PR and the planetary gear unit PU can be disposed at a position, the axial length of the transmission member 140 ₃ for transmitting the reduced rotation The length can be made relatively short. Thereby, compactness of the automatic transmission 1 _3, it is possible to allow the weight reduction, further, it is possible to reduce the inertia (the inertia force) by weight of the transmission member 140 _3, the automatic transmission 1 ₃ Controllability can be improved, and the occurrence of shift shock can be reduced.

The clutch C1 is because through the outer peripheral side of the clutch C2 is connected to the sun gear S2 and the sun gear S3, it is possible to prevent complication of the member for connecting the respective rotary elements, to compact the automatic transmission 1 ₃ Can do.

  Furthermore, the clutch C2 has a structure in which the clutch C1 is disposed on the outer peripheral side and cannot be expanded in diameter on the outer peripheral side. However, by providing the hydraulic servo 162 on the input shaft 20 (for example, on the boss 3c) The pressure receiving area of the hydraulic servo 162, in particular the hydraulic chamber 162a for the hydraulic servo 162, can be secured large on the inner peripheral side, and the capacity of the clutch C1 can be increased.

Further, the planetary gear PR, the planetary gear unit PU, and so providing the counter gear 50 to the input shaft 20 coaxially, particularly when the automatic transmission 1 ₃ is mounted in the FF vehicle, etc. on the other axis (eg reduction planetary gear compared with) a driving wheel transmission mechanism (for example, the counter shaft portion 4) can be made compact in the case where, for example, it is possible to prevent interference with the vehicle body member, the vehicle mountability of the automatic transmission 1 ₃ Can be improved.

Further, since the clutch C3 connects / disconnects the output of the reduced speed rotation, the reduced speed rotation can be freely output to the ring gear R3, but the input shaft input to the carrier CR1 is released by releasing the clutch C3. Can be idled by the planetary gear PR, particularly the ring gear R1. Thereby, the sun gear S1, without disposing a brake, can be fixed to a direct casing 3, compact automatic transmission 1 ₃ may allow weight reduction. Further, since the brake for fixing the sun gear S1 is not provided, the brake B2 for allowing the ring gear R3 to be locked can be provided on the outer peripheral side of the planetary gear PR.

Further, since the hydraulic servo 162 is provided on the input shaft 20, leakage is prevented from the case 3 by a pair of seal rings 181 and oil is supplied to the oil passages 20 a and 20 b provided in the input shaft 20. Thus, for example, oil can be supplied to the oil chamber 162a of the hydraulic servo 162 without providing a seal ring between the input shaft 20 and the hydraulic servo 162. Further, the hydraulic servos 161 and 166 can supply oil from the boss portions 3c and 3d ₃ extending from the case 3, respectively, without passing through other members, for example, a pair of seal rings. Oil can be supplied by providing 180 and 182, respectively. Therefore, oil can be supplied to the hydraulic servos 162, 161, 166 simply by providing a pair of seal rings 181, 180, 182 respectively, and sliding resistance by the seal rings can be minimized, thereby, it is possible to improve the efficiency of the automatic transmission 1 _3.

Further, the friction plate 176 is disposed radially outer peripheral side of the planetary gear PR, it can be made compact automatic transmission 1 ₃ in the axial direction. Further, the planetary gear PR and the planetary gear unit PU can be disposed adjacent to each other by arranging the planetary gear PR between the hydraulic servo 166 of the clutch C3 and the planetary gear unit PU (the hydraulic servo of the clutch C3). 166 because there is no between the planetary gear PR and the planetary gear unit PU), can be relatively short transmission member 140 _3. Thereby, compactness of the automatic transmission 1 _3, it is possible to allow the weight reduction, further, it is possible to reduce the inertia (the inertia force), is possible to improve the controllability of the automatic transmission 1 ₃ And the occurrence of shift shock can be reduced.

Further, the planetary gear PR is because the double-pinion planetary gear, it is possible to output a reduced rotation to rotation of the input shaft 20, also the gear ratio of the automatic transmission 1 ₃ as set better, the planetary gear unit, the reduction planetary gear without increasing the respective rotating elements, because it can also suppress the high rotation, it is possible to make the automatic transmission 1 ₃ compact.

  Further, the planetary gear PR is configured to include a carrier CR1 that is an input rotation element, a sun gear S1 that is a fixed element, and a ring gear R1 that is an output rotation element, so that the rotation of the input shaft 20 is reduced. Can be output.

The planetary gear unit PU is composed of a first simple planetary gear SP2 having a sun gear S2, a carrier CR2, and a ring gear R2, and a second simple planetary gear SP3 having a sun gear S3, a carrier CR3, and a ring gear R3. speed, yet one capable of enabling the first reverse speed, can be arranged close to the planetary gear PR and the planetary gear unit PU, is relatively short transmission member 140 ₃ that transmits the reduced rotation be able to.

  In addition, since the one-way clutch F3 that is arranged in parallel with the brake B4 and restricts the rotation of the carrier CR3 and the ring gear R2 in one direction is provided, for example, the first forward speed at the time of the positive drive is the engagement between the clutch C1 and the one-way clutch F3. Therefore, for example, the first forward speed when switching from the non-traveling range to the traveling range can be achieved smoothly.

  Further, since the brake B4 and the one-way clutch F3 are disposed on the outer peripheral side of the planetary gear unit PU, for example, the one-way clutch F3 is disposed adjacent to the clutch C2 (especially for restricting rotation in one direction of the hub member 123). Compared to the case, the portion where the clutches C1 and C2 are disposed can be made compact in the axial direction, so that the counter gear 50 can be brought closer to the torque converter side. Thereby, the gear 51 of the countershaft 52 can be brought closer to the torque converter side, and the countershaft portion 4 can be made compact in the axial direction.

Also, since the forming the inner race and the ring gear R2 of the one-way clutch F3 together, yet as it can be made compact counter shaft portion 4 in the axial direction, the automatic transmission of the automatic transmission 1 ₃ can be made compact mechanism 2 ₃ with respect to the radial direction.

  Further, since the one-way clutch F2 that is arranged in parallel with the brake B2 and restricts the rotation of the ring gear R3 in one direction by the locking of the brake B3 is provided, for example, smooth shifting from the second forward speed to the third forward speed is possible. Can be done.

Further, as shown in the speed diagram, the planetary gear PR and the planetary gear unit PU can be arranged close to each other, while being able to achieve the sixth forward speed and the first reverse speed, the transmission for transmitting the reduced speed rotation. it can be relatively short member 140 _3. Thereby, compactness of the automatic transmission 1 _3, it is possible to allow the weight reduction, further, it is possible to reduce the inertia (the inertia force), is possible to improve the controllability of the automatic transmission 1 ₃ And the occurrence of shift shock can be reduced.

  Further, the sixth forward speed and the first reverse speed are achieved, and both the clutches C1 and C2 are engaged with the fourth forward speed, that is, the direct forward state is established at the fourth forward speed. The gear ratio at the 6th forward speed can be set high, and especially when mounted on a vehicle, the engine speed can be lowered in a vehicle that travels at a high vehicle speed. It can contribute to silence.

Further, as a drive wheel transmission mechanism, a counter gear that has a differential portion 5 that outputs rotation to the drive wheel and a counter shaft portion 4 that engages with the differential portion 5, and an output member meshes with the counter shaft portion 4. since it is, it is possible to mount the automatic transmission 1 ₃ for example in the FF vehicle.

< Third reference example >
Hereinafter, a third reference example in which the first embodiment is partially modified will be described with reference to FIGS. 15 to 18. Figure 15 is a sectional view showing an automatic speed change mechanism of an automatic transmission according to the third reference example, FIG. 16 is a skeleton diagram showing an automatic transmission according to the third reference example, FIG. 17 according to the third reference example FIG. 18 is a speed diagram of the automatic transmission according to the third reference example . In the third reference example , the same reference numerals are given to the same parts as those in the first embodiment, except for some changes, and the description thereof is omitted.

As shown in FIGS. 15 and 16, the automatic transmission 1 ₄ according to the third reference example, the automatic transmission 1 ₃ of the first embodiment (see FIGS. 11 and 12), the input shaft The rotation of 20 is input to the sun gear (input rotation element, first sun gear) S1 instead of the carrier CR1 of the planetary gear (deceleration rotation output means, reduction planetary gear) PR.

As shown in FIG. 15, in the automatic speed change mechanism 2 _4, on the opposite side end outer peripheral side of the input shaft 20 of the intermediate shaft 304 (in FIG. 15 left side), between the sun gear S1 is intermediate shaft 30 integrally with the The input rotation is always input. Further, on the boss portion 3d ₄ having a sleeve-like member 131 ₄ is fixed, the carrier plate 133 ₄ (fixed element, a first carrier) CR1 is, the with splined to said sleeve-like member 131 ₄ secured on the boss portion 3d ₄ is (always fixed). Carrier CR1, the other side plate 134 ₄ by the pinion P1a, has to support the P1b (refer to FIG. 16), together with the pinion P1b meshes with the sun gear S1, the pinion P1a ring gear (Output Rotating element, first ring gear) R1 is meshed. The ring gear R1 is rotatably supported with respect to the sleeve-like member 131 ₄ by a disc-shaped member 135 _4.

On the other hand, the tip end inner peripheral side of the clutch drum (a third clutch drum) 132 is rotatably supported on the central shaft 30 _4, transmission member for transmitting the rotation of the clutch drum 132 (the reduced rotation output means) 140 ₄ is connected. Then, the substantially middle portion of said transmission member 140 _4, the ring gear R3 of the second simple planetary SP3 of the planetary gear unit PU is fixed. Further, the side plates 142 ₄ of the carrier CR3 of the second simple planetary SP3 is splined to and sleeve member 126 ₄ integrally formed with the hub member 123 of the clutch C2. The clutch drum 132 is opened in the direction of the planetary gear PR, and the planetary gear PR is disposed between the axial direction of the hydraulic servo 166 and the planetary gear unit PU. Further, the friction plate 176 is disposed at a position overlapping the radially outer diameter side of the planetary gear PR.

Subsequently, based on the above arrangement, 16 the action of the planetary gear PR of the automatic transmission 1 _2, will be described with reference to FIGS. 17 and 18. As in the first embodiment, in the velocity diagram shown in FIG. 18, the vertical axis indicates the rotational speed of each rotating element, and the horizontal axis corresponds to the gear ratio of these rotating elements. Show. Also, in the planetary gear unit PU portion of the velocity diagram, the vertical axis at the lateral end (right side in FIG. 18) is the ring gear R3, and thereafter the vertical axis is the ring gear R2 and the carrier in order to the left side in the figure. It corresponds to CR3, carrier CR2, sun gear S2, and sun gear S3.

As shown in FIG. 16, the above sun gear S1, the rotation of the input shaft 20 via the intermediate shaft 30 ₄ is input, the carrier CR1 is rotated is fixed to the case 3, the ring gear R1 is , The motor rotates at a reduced speed based on the rotation of the input shaft 20 input to the sun gear S1. The aforementioned ring gear R3, by the clutch C3 is engaged, the reduced rotation of the ring gear R1 is input via the transmission member 140 _4.

Then, as shown in FIGS. 17 and 18, at the first forward speed, the second forward speed, the fourth forward speed, and the sixth forward speed, the planetary gear PR is fixed to the sun gear S1 to which the rotation of the input shaft 20 is input. Although the reduced rotation to the ring gear R3 by the carrier CR1, which is the output, the clutch C3 is released, it not performed the torque transmission is particularly transmission member 140 _4. On the other hand, in the third forward speed, the fifth forward speed, and the first reverse speed, the clutch C3 is engaged in the planetary gear PR, so that the ring gear is driven by the sun gear S1 to which the rotation of the input shaft 20 is input and the fixed carrier CR1. R3 is decelerated rotation, the reduced rotation of the ring gear R1 to the ring gear R3 via the clutch C3 and the transmission member 140 ₄ is output. Since this time, the ring gear R1 and the ring gear R3 are reduced rotation, the transmission member 140 ₄ is performed relatively large torque transmission.

  Since the operations other than the planetary gear PR are the same as those in the first embodiment described above, description thereof is omitted.

As described above, according to the automatic transmission 1 ₄ according to the present invention, the planetary gear PR as the reduced rotation output unit, the clutch C3, and the transmission member 140 ₄ one axial side of the planetary gear unit PU (FIG. 15 and in FIG. 16 (The left side), the clutch C1 and the clutch C2 are arranged on the other axial side of the planetary gear unit PU (the right side in FIGS. 15 and 16), and the counter gear 50 as an output member is further connected to the clutch C1 and because disposed between the clutch C2 and the planetary gear unit PU, in particular it can be disposed in a position close to the planetary gear PR and the planetary gear unit PU, the axial length of the transmission member 140 ₄ for transmitting the reduced rotation The length can be made relatively short. Thereby, downsizing of the automatic transmission 1 _4, it is possible to allow the weight reduction, further, it is possible to reduce the inertia (the inertia force) by weight of the transmission member 140 _4, the automatic transmission 1 ₄ Controllability can be improved, and the occurrence of shift shock can be reduced.

The clutch C1 is because through the outer peripheral side of the clutch C2 is connected to the sun gear S2 and the sun gear S3, be made compact complicated can be prevented, the automatic transmission 1 ₄ of the member for connecting the various rotary elements Can do.

  Furthermore, the clutch C2 has a structure in which the clutch C1 is disposed on the outer peripheral side and cannot be expanded in diameter on the outer peripheral side. However, by providing the hydraulic servo 162 on the input shaft 20 (for example, on the boss 3c) The pressure receiving area of the hydraulic servo 162, in particular the hydraulic chamber 162a for the hydraulic servo 162, can be secured large on the inner peripheral side, and the capacity of the clutch C1 can be increased.

Further, the planetary gear PR, the planetary gear unit PU, and so providing the counter gear 50 to the input shaft 20 coaxially, particularly when the automatic transmission 1 ₄ mounted in the FF vehicle, etc. on the other axis (eg reduction planetary gear can be compact compared with) the drive wheel transmission mechanism (for example, the counter shaft portion 4, etc.) in the case of providing, for example, it is possible to prevent interference with the vehicle body member, the vehicle mountability of the automatic transmission 1 ₄ Can be improved.

Also, since the clutch C3 connects / disconnects the output of the reduced speed rotation, the reduced speed rotation can be freely output to the ring gear R3, but the input shaft input to the sun gear S1 is released by releasing the clutch C3. Can be idled by the planetary gear PR, particularly the ring gear R1. Thereby, the carrier CR1, without disposing a brake, can be fixed to a direct casing 3, compact automatic transmission 1 _4, may allow for weight reduction. Further, since a brake for fixing the carrier CR1 is not provided, a brake B2 for allowing the ring gear R3 to be locked can be provided on the outer peripheral side of the planetary gear PR.

Further, since the hydraulic servo 162 is provided on the input shaft 20, leakage is prevented from the case 3 by a pair of seal rings 181 and oil is supplied to the oil passages 20 a and 20 b provided in the input shaft 20. Thus, for example, oil can be supplied to the oil chamber 162a of the hydraulic servo 162 without providing a seal ring between the input shaft 20 and the hydraulic servo 162. Further, the hydraulic servos 161 and 166 can supply oil from the boss portions 3c and 3d extending from the case 3, respectively, without passing through other members, for example, a pair of seal rings 180. , 182 respectively, oil can be supplied. Therefore, oil can be supplied to the hydraulic servos 162, 161, 166 simply by providing a pair of seal rings 181, 180, 182 respectively, and sliding resistance by the seal rings can be minimized, thereby, it is possible to improve the efficiency of the automatic transmission 1 _4.

Further, the friction plate 176 is disposed radially outer peripheral side of the planetary gear PR, it can be made compact automatic transmission 1 ₄ in the axial direction. Further, the planetary gear PR and the planetary gear unit PU can be disposed adjacent to each other by arranging the planetary gear PR between the hydraulic servo 166 of the clutch C3 and the planetary gear unit PU (the hydraulic servo of the clutch C3). 166 because there is no between the planetary gear PR and the planetary gear unit PU), can be relatively short transmission member 140 _4. Thereby, compactness of the automatic transmission 1 _4, it is possible to allow the weight reduction, further, it is possible to reduce the inertia (the inertia force), is possible to improve the controllability of the automatic transmission 1 ₄ And the occurrence of shift shock can be reduced.

Further, the planetary gear PR is because the double-pinion planetary gear, it is possible to output a reduced rotation to rotation of the input shaft 20, also the gear ratio of the automatic transmission 1 ₄ as set better, the planetary gear unit, the reduction planetary gear without increasing the respective rotating elements, because it can also suppress the high rotation, it is possible to make the automatic transmission 1 ₄ compact.

  Further, the planetary gear PR is configured to include a sun gear S1 that is an input rotation element, a carrier CR1 that is a fixed element, and a ring gear R1 that is an output rotation element, so that the rotation of the input shaft 20 is reduced. Can be output.

The planetary gear unit PU is composed of a first simple planetary gear SP2 having a sun gear S2, a carrier CR2, and a ring gear R2, and a second simple planetary gear SP3 having a sun gear S3, a carrier CR3, and a ring gear R3. speed, yet one capable of enabling the first reverse speed, can be arranged close to the planetary gear PR and the planetary gear unit PU, is relatively short transmission member 140 ₄ that transmits the reduced rotation be able to.

  In addition, since the one-way clutch F3 that is arranged in parallel with the brake B4 and restricts the rotation of the carrier CR3 and the ring gear R2 in one direction is provided, for example, the first forward speed at the time of the positive drive is the engagement between the clutch C1 and the one-way clutch F3. Therefore, for example, the first forward speed when switching from the non-traveling range to the traveling range can be achieved smoothly.

  Further, since the brake B4 and the one-way clutch F3 are disposed on the outer peripheral side of the planetary gear unit PU, for example, the one-way clutch F3 is disposed adjacent to the clutch C2 (especially for restricting rotation in one direction of the hub member 123). Compared to the case, the portion where the clutches C1 and C2 are disposed can be made compact in the axial direction, so that the counter gear 50 can be brought closer to the torque converter side. Thereby, the gear 51 of the countershaft 52 can be brought closer to the torque converter side, and the countershaft portion 4 can be made compact in the axial direction.

Also, since the forming the inner race and the ring gear R2 of the one-way clutch F3 together, yet as it can be made compact counter shaft portion 4 in the axial direction, the automatic transmission of the automatic transmission 1 ₄ can be made compact mechanism 2 ₄ with respect to the radial direction.

  Further, since the one-way clutch F2 that is arranged in parallel with the brake B2 and restricts the rotation of the ring gear R3 in one direction by the locking of the brake B3 is provided, for example, smooth shifting from the second forward speed to the third forward speed is possible. Can be done.

In addition, as shown in the speed diagram, the planetary gear PR and the planetary gear unit PU can be arranged close to each other to achieve the sixth forward speed and the first reverse speed, and the transmission that transmits the reduced speed rotation can be achieved. it can be relatively short member 140 _4. Thereby, compactness of the automatic transmission 1 _4, it is possible to allow the weight reduction, further, it is possible to reduce the inertia (the inertia force), is possible to improve the controllability of the automatic transmission 1 ₄ And the occurrence of shift shock can be reduced.

  Further, the sixth forward speed and the first reverse speed are achieved, and both the clutches C1 and C2 are engaged with the fourth forward speed, that is, the direct forward state is established at the fourth forward speed. The gear ratio at the 6th forward speed can be set high, and especially when mounted on a vehicle, the engine speed can be lowered in a vehicle that travels at a high vehicle speed. It can contribute to silence.

Further, as a drive wheel transmission mechanism, a counter gear that has a differential portion 5 that outputs rotation to the drive wheel and a counter shaft portion 4 that engages with the differential portion 5, and an output member meshes with the counter shaft portion 4. since it is, it is possible to mount the automatic transmission 1 ₄ for example in the FF vehicle.

The first embodiment according to the present invention described above, in the first, second and third reference example, described what comprises a torque converter 12 to the automatic transmission 1 ₁ to 1 ₄ as an example However, the present invention is not limited to this, and any starting device that transmits torque (rotation) at the time of starting may be used. Moreover, although the case where it mounts in the vehicle which is an engine as a drive source was demonstrated, it is not restricted to this, It is possible to mount in a hybrid vehicle, Of course, any drive source may be sufficient. is there. Further, the automatic transmission 1 ₁ to 1 ₄ are suitable with the FF vehicle, not limited to this, FR vehicles, such as four-wheel drive vehicle, it is also possible to use the vehicle for other driving methods.

< Second Embodiment >
Hereinafter will be described with reference to FIGS. 19 to 21 for the second embodiment, which is a partial modification of the first and second reference example. Figure 19 is a schematic sectional view showing an automatic speed change mechanism of an automatic transmission according to the second embodiment, FIG. 20 operation table of an automatic transmission according to the second embodiment, FIG. 21 of the second embodiment It is a speed diagram of the automatic transmission which concerns on a form . In the second embodiment , the same reference numerals are given to the same parts as those in the first and second reference examples, and the description thereof will be omitted except for some changes.

First, the automatic transmission mechanism ₂₅ of the automatic transmission 1 according to the second embodiment will be described with reference to FIG. As shown in FIG. 19, the input shaft 20 has a planetary gear unit PU and a planetary gear (decelerated rotation output means, decelerated planetary gear) PR. The planetary gear unit PU includes four rotating elements: a sun gear (second rotating element, third sun gear) S2, a carrier (third rotating element, second carrier) CR2, a ring gear (fourth rotating element, second gear). And a long pinion PL which is supported by the side plates 242 and 244 and meshes with the sun gear S3 and the ring gear R2; and a ring gear R2 and a sun gear (first rotating element, second sun gear) S3. This is a so-called Ravigneaux type planetary gear having a short pinion PS meshing with the sun gear S2 so as to mesh with each other. The planetary gear PR includes a carrier (fixed element, first carrier) CR1, a pinion P2 meshed with a ring gear (output rotating element, first ring gear) R1, and a sun gear (input rotating element, first sun gear) S1. This is a so-called double pinion planetary gear having pinions P1 meshing with each other.

  On the input shaft 20, on the inner periphery side, a hydraulic servo 262, a friction plate 272, a drum-like member 222 forming a clutch drum (first clutch drum), and a hub member (second member) connected to the sun gear S2. And a drum that forms a hydraulic servo 261, a friction plate 271, and a clutch drum (second clutch drum) on the outer peripheral side thereof. A multi-plate clutch (second clutch) C2 having a member 224 and a hub member (member coupled to the third rotating element) 225 coupled to the carrier CR2 is disposed.

  The hydraulic servo 262 has a piston member (first piston) 262b for pressing the friction plate 272, a drum-like member 222 having a cylinder part 262e, and a seal between the piston member 262b and the cylinder part 262e. An oil chamber (first hydraulic servo hydraulic chamber) 262a formed by being sealed by the rings 262f and 262g, a return spring 262c for urging the piston member 262b toward the oil chamber 262a, and the return spring 262c And a return plate 262d for receiving the urging force. The oil chamber 262a communicates with oil passages 20a and 20b formed in the input shaft 20, and the oil passage 20a extends to one end of the case 3 and is provided in a sleeve shape on the input shaft 20. It communicates with the oil passage 291 of the boss 3c. The oil passage 291 communicates with a hydraulic control device (not shown). That is, since the hydraulic servo 262 is disposed on the input shaft 20, a pair of seal rings 281 that seal between the boss portion 3 c of the case 3 and the input shaft 20 are provided from a hydraulic control device (not shown). An oil path to the oil chamber 262a is configured.

  The hydraulic servo 261 includes a piston member (second piston) 261b for pressing the friction plate 271; a drum-like member 224 having a cylinder member 261e; and the piston member 261b and the cylinder member 261e. An oil chamber (second hydraulic servo hydraulic chamber) 261a formed by being sealed by seal rings 261f and 261g, a return spring 261c for urging the piston member 261b in the direction of the oil chamber 261a, and the return And a return plate 261d for receiving the bias of the spring 261c. The oil chamber 261a communicates with an oil passage 292 of the boss portion 3c, and the oil passage 292 communicates with a hydraulic control device (not shown). That is, in the hydraulic servo 261, an oil path from a hydraulic control device (not shown) to the oil chamber 261a is configured by a pair of seal rings 280 that seal between the boss 3c of the case 3 and the cylinder member 261e. Yes.

  That is, the drum-shaped member 222 is connected to the input shaft 20, and a clutch C 1 that can be engaged by a hydraulic servo 262 for the clutch C 1 is provided on the inner peripheral side of the tip of the drum-shaped member 222. The clutch C1 is arranged so as to engage with the spline, and the inner peripheral side of the clutch C1 is connected to the hub member 223 so as to engage with the spline. The hub member 223 is connected to the sun gear S2. Further, on the inner peripheral side of the tip of the drum-shaped member 224, a clutch C2 that can be engaged by the hydraulic servo 261 for the clutch C2 is arranged in a spline engagement manner, and the inner peripheral side of the clutch C2 The hub member 225 is connected in a splined manner. The hub member 225 is connected to the carrier CR2.

  On the other hand, on the other end (left side in the figure) of the input shaft 20, a hydraulic servo 265, a friction plate 275, a drum-like member 232 forming a clutch drum (third clutch drum), and a hub connected to the ring gear R1. A multi-plate clutch C3 having a member 235 is disposed. The hydraulic servo 265 is sealed by a piston member 265b for pressing the friction plate 275, a drum-like member 232 having a cylinder portion 265e, and seal rings 265f and 265g between the piston member 265b and the cylinder portion 265e. The oil chamber 265a is formed, a return spring 265c that urges the piston member 265b in the direction of the oil chamber 265a, and a return plate 265d that receives the urging force of the return spring 265c. The clutch drum formed of the drum-like member 232 is open in the direction of the planetary gear PR, and the planetary gear PR is disposed between the hydraulic servo 265 and the planetary gear unit PU in the axial direction. Further, the friction plate 275 is disposed at a position overlapping the radially outer diameter side of the planetary gear PR.

  The oil chamber 265a extends to the other end of the case 3 opposite to the boss portion 3c, and communicates with an oil passage 293 of a boss portion 3d provided in a sleeve shape on the input shaft 20. The oil passage 293 communicates with a hydraulic control device (not shown). That is, the hydraulic servo 265 is connected from a hydraulic control device (not shown) to the oil chamber 265a by a pair of seal rings 282 that seal between the boss 3d of the case 3 and the drum-like member 232 having the cylinder 265e. An oil passage is constructed.

  A multi-plate brake B1 having a hydraulic servo 264 and a friction plate 274 is disposed on the outer peripheral side of the clutch C3 and on the inner peripheral side of the case 3b. The hydraulic servo 264 includes a piston member 264b for pressing the friction plate 274, a cylinder portion 264e formed in a part of the case 3b, and a seal ring 264f, between the piston member 264b and the cylinder portion 264e, An oil chamber 264a that is sealed by H.264g, a return spring 264c that urges the piston member 264b in the direction of the oil chamber 264a, and a return plate 264d that receives the urge of the return spring 264c. ing.

  That is, a drum-like member 232 is rotatably supported on the boss portion 3d on the left side in the drawing, and a clutch C3 hydraulic servo 265 is provided on the inner peripheral side of the tip end portion of the drum-like member 232. A clutch (third clutch) C3 that is freely engageable is arranged so as to engage with the spline. A hub member 235 on which the ring gear R1 is formed is disposed on the inner peripheral side of the clutch C3 so as to be spline-engaged. The hub member 235 is rotatably supported on the input shaft 20. . A brake (second brake) B1 that can be locked by the hydraulic servo 264 for the brake B1 is arranged on the outer peripheral side of the front end portion of the drum-like member 232 in a spline engagement manner. The carrier CR1 has a pinion P1 and a pinion P2. The pinion P2 meshes with the ring gear R1, and the pinion P1 meshes with a sun gear S1 connected to the input shaft 20. The carrier CR1 is fixed to the boss 3d of the case 3b via the side plate 231.

  A drum-like member 232 in which the clutch C3 and the brake B1 are spline-engaged is rotatably supported on the boss portion 3d, and transmits a rotation of the ring gear R1 when the clutch C3 is engaged. 240 is connected, and the other side of the transmission member 240 is connected to the sun gear S3 of the planetary gear unit PU.

  On the other hand, a multi-plate brake (third brake) B2 having a hydraulic servo 263, a friction plate 273, and a hub member 247 is disposed on the outer peripheral side of the planetary gear unit PU. The hydraulic servo 263 includes a piston member 263b for pressing the friction plate 273, a cylinder part 263e formed in a part of the case 3b, and a seal ring 263f, between the piston member 263b and the cylinder part 263e, An oil chamber 263a formed by being sealed by 263g, a return spring 263c that urges the piston member 263b in the direction of the oil chamber 263a, and a return plate 263d that receives the urge of the return spring 263c. ing.

  A one-way clutch (first one-way clutch) F3 is disposed on the outer peripheral side of the planetary gear unit PU, and the outer race of the one-way clutch F3 is spline-engaged with the inner periphery of the transmission case 3b. is doing. A hub member 247 in which the brake B2 is spline-engaged is connected to the side plate 242 of the carrier CR2 of the planetary gear unit PU, and the inner race of the one-way clutch F3 is connected to the hub member 247. Yes. The ring gear R2 meshes with the long pinion PL of the carrier CR2. A connecting member 245 is connected to one end of the ring gear R2, and the ring gear R2 is connected to the counter gear 50 via the connecting member 245. It is connected to.

  As described above, the planetary gear PR is disposed on one side in the axial direction of the planetary gear unit PU, the clutch C1 and the clutch C2 are disposed on the other side in the axial direction, and the counter gear 50 is disposed between the clutch C1 and the clutch C2 and the planetary gear unit PU. ing. The clutch C3 and the brake B1 are disposed on the outer peripheral side of the planetary gear PR, and the brake B2 is disposed on the outer peripheral side of the planetary gear unit PU. The planetary gear PR, the planetary gear unit PU, and the counter gear 50 are configured to be coaxial with the input shaft 20.

Subsequently, based on the above configuration, FIG. 19 for the operation of the automatic speed change mechanism 2 _5, it will be described with reference to FIGS. 20 and 21. In the velocity diagram shown in FIG. 21, the vertical axis indicates the rotational speed of each rotating element, and the horizontal axis indicates the gear ratio of these rotating elements. Further, in the planetary gear unit PU portion of the velocity diagram, the vertical axis at the lateral end (right side in FIG. 21) is the sun gear S3, and the vertical axes are the carrier CR2 and the ring gear in order to the left side in the drawing. It corresponds to R2 and sun gear S2.

  As shown in FIG. 19, the rotation of the input shaft 20 is input to the sun gear S2 when the clutch C1 is engaged. The rotation of the input shaft 20 is input to the carrier CR2 when the clutch C2 is engaged, and the rotation of the carrier CR2 is freely fixed by the locking of the brake B2, and the one-way clutch F3 Therefore, the rotation in one direction is restricted. Further, the rotation of the sun gear S3 can be fixed by locking the brake B1.

  On the other hand, the sun gear S1 is connected to the input shaft 20, the rotation of the input shaft 20 is input, and the carrier CR1 is connected to the case 3b and the rotation is fixed, whereby the ring gear R1 is Decelerate and rotate. Further, when the clutch C3 is engaged, the reduced rotation of the ring gear R1 is input to the sun gear S3.

  The rotation of the ring gear R2 is output to the counter gear 50, and is output to a driving wheel (not shown) via the counter gear 50, the counter shaft portion 4 and the differential portion 5 (see FIG. 1).

  At the first forward speed in the D (drive) range, as shown in FIG. 20, the clutch C1 and the one-way clutch F3 are engaged. Then, as shown in FIG. 21, the rotation of the input shaft 20 is input to the sun gear S2 via the clutch C1, and the rotation of the carrier CR2 is restricted in one direction (forward rotation direction). Reverse rotation is prevented and the state is fixed. Then, the rotation of the input shaft 20 input to the sun gear S2 is output to the ring gear R2 via the fixed carrier CR2, and the forward rotation as the first forward speed is output from the counter gear 50. During engine braking (coasting), the brake B2 is locked to fix the carrier CR2, and the forward first speed state is maintained in a manner that prevents forward rotation of the carrier CR2. Further, at the first forward speed, the one-way clutch F3 prevents the carrier CR2 from rotating in the reverse direction and enables the forward rotation, so that, for example, the first forward speed when switching from the non-traveling range to the traveling range is achieved. Can be smoothly performed by automatic engagement of the one-way clutch.

  At the second forward speed in the D (drive) range, as shown in FIG. 20, the clutch C1 is engaged and the brake B1 is locked. Then, as shown in FIG. 21, the rotation of the input shaft 20 is input to the sun gear S2 via the clutch C1, and the sun gear S3 is fixed by the locking of the brake B1. As a result, the carrier CR2 is slightly decelerated and rotated, and the rotation of the input shaft 20 input to the sun gear S2 is output to the ring gear R2 via the decelerated carrier CR2, and the forward rotation as the second forward speed is performed. Output from the counter gear 50.

  At the third forward speed in the D (drive) range, as shown in FIG. 20, the clutch C1 and the clutch C3 are engaged. Then, as shown in FIG. 21, the rotation of the input shaft 20 is input to the sun gear S2 via the clutch C1. The ring gear R1 is decelerated and rotated by the rotation of the input shaft 20 input to the sun gear S1 and the fixed carrier CR1, and the decelerated rotation of the ring gear R1 is output to the sun gear S3 via the clutch C3 and the transmission member 240. Is done. Then, the rotation of the input shaft 20 input to the sun gear S2 and the reduction rotation of the sun gear S3 cause the carrier CR2 to rotate at a slightly lower speed than the reduction rotation of the sun gear S3. Then, the rotation of the input shaft 20 input to the sun gear S2 is output to the ring gear R2 through the carrier CR2 of the decelerated rotation, and the forward rotation as the third forward speed is output from the counter gear 50. At this time, since the sun gear S3 and the ring gear R1 rotate at a reduced speed, the transmission member 240 transmits a relatively large torque.

  In the fourth forward speed in the D (drive) range, as shown in FIG. 20, the clutch C1 and the clutch C2 are engaged. Then, as shown in FIG. 21, the rotation of the input shaft 20 is input to the sun gear S2 via the clutch C1 and to the carrier CR2 via the clutch C2. As a result, the rotation of the input shaft 20 input to the sun gear S2 and the rotation of the input shaft 20 input to the carrier CR2 are brought into a directly coupled rotation state, and the rotation of the input shaft 20 is directly output to the ring gear R2. Forward rotation as the fourth forward speed is output from the counter gear 50.

  At the fifth forward speed in the D (drive) range, as shown in FIG. 20, the clutch C2 and the clutch C3 are engaged. Then, as shown in FIG. 21, the rotation of the input shaft 20 is input to the carrier CR2 via the clutch C2. The ring gear R1 is decelerated and rotated by the rotation of the input shaft 20 input to the sun gear S1 and the fixed carrier CR1, and the decelerated rotation of the ring gear R1 is transmitted to the sun gear S3 via the clutch C3 and the transmission member 240. The decelerated rotation is output. Then, the decelerating rotation of the sun gear S3 and the carrier CR2 to which the rotation of the input shaft 20 is input are output at an increased speed and output to the ring gear R2, and the forward rotation as the fifth forward speed is output from the counter gear 50. Is done. At this time, similarly to the state of the third forward speed, the sun gear S3 and the ring gear R1 are decelerated and rotated, so that the transmission member 240 transmits a relatively large torque.

  At the sixth forward speed in the D (drive) range, as shown in FIG. 20, the clutch C2 is engaged and the brake B1 is locked. Then, as shown in FIG. 21, the rotation of the input shaft 20 is input to the carrier CR2 via the clutch C2, and the sun gear S3 is fixed by the locking of the brake B1. As a result, the rotation of the input shaft 20 input to the carrier CR2 and the fixed sun gear S3 result in an increased rotation speed (greater than the fifth forward speed) and output to the ring gear R2 as the sixth forward speed. Is output from the counter gear 50.

  At the first reverse speed in the R (reverse) range, the clutch C3 is engaged and the brake B2 is locked, as shown in FIG. Then, as shown in FIG. 21, the ring gear R1 is decelerated and rotated by the rotation of the input shaft 20 input to the sun gear S1 and the fixed carrier CR1, and the decelerated rotation of the ring gear R1 is the clutch C3 and the transmission member. The reduced speed rotation is output to the sun gear S3 via 240. Further, the carrier CR2 is fixed by the locking of the brake B2. Then, the decelerated rotation of the sun gear S3 and the fixed carrier CR2 are output as the reverse rotation to the ring gear R2, and the reverse rotation as the first reverse speed is output from the counter gear 50. At this time, similarly to the state of the third forward speed and the fifth forward speed, the sun gear S3 and the ring gear R1 are rotating at a reduced speed, so that the transmission member 240 transmits a relatively large torque.

In the P (parking) range and the N (neutral) range, in particular, the clutch C1, the clutch C2, and the clutch C3 are disengaged, the power transmission between the input shaft 20 and the counter gear 50 is in a disconnected state, and automatic shifting is performed. The mechanism _{25 as a} whole is in an idling state (neutral state).

As described above, according to the automatic transmission mechanism ₂₅ according to the present invention, the planetary gear PR, the clutch C3, and the transmission member 240 as the reduction rotation output means are connected to one side in the axial direction of the planetary gear unit PU (the left side in FIG. 19). The clutch C1 and the clutch C2 are arranged on the other side in the axial direction of the planetary gear unit PU (right side in FIG. 19), and the counter gear 50 as an output member is connected to the clutch C1 and the clutch C2 and the planetary gear unit PU. In particular, the planetary gear PR and the planetary gear unit PU can be arranged close to each other, and the axial length of the transmission member 240 for transmitting the reduced speed rotation can be made relatively short. it can. Thereby, compactness of the automatic transmission 1 _5, it is possible to allow the weight reduction, further, it is possible to reduce the inertia (the inertia force) by weight of the transmission member 240, the automatic transmission 1 ₅ Controllability can be improved and occurrence of shift shock can be reduced.

Further, since the clutch C2 is connected to the carrier CR2 through the outer peripheral side of the clutch C1, it is possible to prevent complication of members for connecting the rotating elements, and the automatic transmission ₁₅ can be made compact.

  Further, the clutch C1 has a structure in which the clutch C2 is disposed on the outer peripheral side thereof and cannot be expanded in diameter on the outer peripheral side. However, by providing the hydraulic servo 262 on the input shaft 20 (for example, on the boss 3c) The pressure receiving area of the hydraulic servo 262, in particular, the hydraulic chamber 262a for the hydraulic servo 262 can be ensured largely on the inner peripheral side, and the capacity of the clutch C1 can be increased.

Further, since the planetary gear PR, the planetary gear unit PU, and the counter gear 50 are provided coaxially with the input shaft 20, particularly when the automatic transmission ₁₅ is mounted on an FF vehicle (for example, a reduction planetary gear or the like on the other shaft). can be compact compared with) the drive wheel transmission mechanism (for example, the counter shaft portion 4, etc.) in the case of providing, for example, it is possible to prevent interference with the vehicle body member, the vehicle mountability of the automatic transmission 1 ₅ Can be improved.

Further, since the clutch C3 connects / disconnects the output of the reduced speed rotation, the reduced speed rotation can be freely output to the sun gear S3, but the input shaft input to the sun gear S1 is released by releasing the clutch C3. Can be idled by the planetary gear PR, particularly the ring gear R1. Thereby, the carrier CR1, without disposing a brake, can be fixed to a direct casing 3, compact automatic transmission 1 ₅ may allow weight reduction. Further, since the brake for fixing the carrier CR1 is not provided, the brake B1 for allowing the sun gear S3 to be locked can be provided on the outer peripheral side of the planetary gear PR.

Further, since the hydraulic servo 262 is provided on the input shaft 20, leakage is prevented from the case 3 by a pair of seal rings 281 and oil is supplied to the oil passages 20 a and 20 b provided in the input shaft 20. Thus, for example, oil can be supplied to the oil chamber 262a of the hydraulic servo 262 without providing a seal ring between the input shaft 20 and the hydraulic servo 262. Furthermore, the hydraulic servos 261 and 265 can supply oil from the boss portions 3c and 3d extending from the case 3 without passing through other members, for example, a pair of seal rings 280. , 282 respectively, oil can be supplied. Therefore, the hydraulic servos 262, 261, and 265 can supply oil only by providing a pair of seal rings 281, 280, and 282, respectively, and can minimize sliding resistance caused by the seal rings. Accordingly, it is possible to improve the efficiency of the automatic transmission 1 _5.

Further, the friction plate 275 is disposed radially outer peripheral side of the planetary gear PR, it can be made compact automatic transmission 1 ₅ in the axial direction. Further, the planetary gear PR and the planetary gear unit PU can be disposed adjacent to each other by arranging the planetary gear PR between the hydraulic servo 265 of the clutch C3 and the planetary gear unit PU (the hydraulic servo of the clutch C3). 265 is not between the planetary gear PR and the planetary gear unit PU), the transmission member 240 can be made relatively short. Thereby, compactness of the automatic transmission 1 _5, it is possible to allow the weight reduction, further, it is possible to reduce the inertia (the inertia force), is possible to improve the controllability of the automatic transmission 1 ₅ And the occurrence of shift shock can be reduced.

Further, the planetary gear PR is because the double-pinion planetary gear, it is possible to output a reduced rotation to rotation of the input shaft 20, also the gear ratio of the automatic transmission 1 ₅ as set better, the planetary gear unit, the reduction planetary gear Therefore, the automatic transmission ₁₅ can be made compact.

  Further, the planetary gear PR is configured to include a sun gear S1 that is an input rotation element, a carrier CR1 that is a fixed element, and a ring gear R1 that is an output rotation element, so that the rotation of the input shaft 20 is reduced. Can be output.

  The planetary gear unit PU is a Ravigneaux type planetary gear constituted by the sun gear S2, the sun gear S3, the carrier CR2, and the ring gear R2. Therefore, for example, it is possible to enable 6 forward speeds and 1 reverse speed. However, the planetary gear PR and the planetary gear unit PU can be disposed close to each other, and the transmission member 240 that transmits the reduced speed rotation can be made relatively short.

  Further, since the one-way clutch F3 arranged in parallel with the brake B2 and restricting the rotation of the carrier CR2 in one direction is provided, for example, the first forward speed at the time of positive driving is achieved by the engagement of the clutch C1 and the one-way clutch F3. Therefore, for example, the first forward speed when switching from the non-traveling range to the traveling range can be achieved smoothly.

  Further, since the brake B2 and the one-way clutch F3 are disposed on the outer peripheral side of the planetary gear unit PU, for example, the one-way clutch F3 is disposed adjacent to the clutch C2 (especially for restricting rotation in one direction of the hub member 223). Compared to the case, the portion where the clutches C1 and C2 are disposed can be made compact in the axial direction, so that the counter gear 50 can be brought closer to the torque converter side. Thereby, the gear 51 of the countershaft 52 can be brought closer to the torque converter side, and the countershaft portion 4 can be made compact in the axial direction.

Further, as shown in the speed diagram, the planetary gear PR and the planetary gear unit PU can be arranged close to each other, while being able to achieve the sixth forward speed and the first reverse speed, the transmission for transmitting the reduced speed rotation. The member 240 can be made relatively short. Thereby, compactness of the automatic transmission 1 _5, it is possible to allow the weight reduction, further, it is possible to reduce the inertia (the inertia force), is possible to improve the controllability of the automatic transmission 1 ₅ And the occurrence of shift shock can be reduced.

  Further, the sixth forward speed and the first reverse speed are achieved, and both the clutches C1 and C2 are engaged with the fourth forward speed, that is, the direct forward state is established at the fourth forward speed. The gear ratio at the 6th forward speed can be set high, and especially when mounted on a vehicle, the engine speed can be lowered in a vehicle that travels at a high vehicle speed. It can contribute to silence.

Further, as a drive wheel transmission mechanism, a counter gear that has a differential portion 5 that outputs rotation to the drive wheel and a counter shaft portion 4 that engages with the differential portion 5, and an output member meshes with the counter shaft portion 4. since it is, it is possible to mount the automatic transmission 1 ₅ for example, FF vehicle.

< Third Embodiment >
Hereinafter, a third embodiment obtained by partially changing the second embodiment will be described with reference to FIG. FIG. 22 is a schematic sectional view showing an automatic transmission mechanism of an automatic transmission according to the third embodiment . In the third embodiment , the same reference numerals are given to the same parts as those in the second embodiment except for some changes, and the description thereof is omitted.

As shown in FIG. 22, the automatic transmission mechanism ₂₆ of the automatic transmission 1 according to the third embodiment is different from the automatic transmission mechanism ₂₅ of the second embodiment (see FIG. 19) on the input side. And the output side are reversed. Further, the operation is the same in the first forward speed to the sixth forward speed and the first reverse speed (see FIGS. 20 and 21).

Thus, as in the second embodiment , according to the automatic transmission mechanism ₂₆ according to the present invention, the planetary gear PR, the clutch C3, and the transmission member 240 as the deceleration rotation output means are connected to one side in the axial direction of the planetary gear unit PU ( 22 on the right side in FIG. 22, the clutch C1 and the clutch C2 are arranged on the other axial side of the planetary gear unit PU (on the left side in FIG. 22), and a counter gear 50 as an output member is connected to the clutch C1 and Since it is arranged between the clutch C2 and the planetary gear unit PU, in particular, the planetary gear PR and the planetary gear unit PU can be arranged close to each other, and the axial length of the transmission member 240 for transmitting the reduced speed rotation Can be made relatively short. Thereby, compactness of the automatic transmission 1 _6, can enable weight reduction, further, it is possible to reduce the inertia (the inertia force) by weight of the transmission member 240, in the automatic transmission 1 ₆ Controllability can be improved and occurrence of shift shock can be reduced.

Further, since the clutch C2 is connected to the carrier CR2 through the outer peripheral side of the clutch C1, it is possible to prevent complication of members for connecting the rotating elements, and the automatic transmission ₁₆ can be made compact.

  Further, the clutch C1 has a structure in which the clutch C2 is disposed on the outer peripheral side thereof and cannot be expanded in diameter on the outer peripheral side. However, by providing the hydraulic servo 262 on the input shaft 20 (for example, on the boss 3c) The pressure receiving area of the hydraulic servo 262, in particular, the hydraulic chamber 262a for the hydraulic servo 262 can be ensured largely on the inner peripheral side, and the capacity of the clutch C1 can be increased.

In addition, since the planetary gear PR, the planetary gear unit PU, and the counter gear 50 are provided coaxially with the input shaft 20, particularly when the automatic transmission ₁₆ is mounted on an FF vehicle (for example, a reduction planetary gear or the like on the other shaft). The drive wheel transmission mechanism (for example, the countershaft portion 4) can be made compact, compared with, for example, the interference with the vehicle body member, and the vehicle mountability of the automatic transmission ₁₆ can be improved. Can be improved.

Further, since the clutch C3 connects / disconnects the output of the reduced speed rotation, the reduced speed rotation can be freely output to the sun gear S3, but the input shaft input to the sun gear S1 is released by releasing the clutch C3. Can be idled by the planetary gear PR, particularly the ring gear R1. Thereby, the carrier CR1 can be directly fixed to the case 3 or the like without disposing a brake, and the automatic transmission ₁₆ can be made compact and lightweight. Further, since the brake for fixing the carrier CR1 is not provided, the brake B1 for allowing the sun gear S3 to be locked can be provided on the outer peripheral side of the planetary gear PR.

Further, since the hydraulic servo 262 is provided on the input shaft 20, leakage is prevented from the case 3 by a pair of seal rings 281 and oil is supplied to the oil passages 20 a and 20 b provided in the input shaft 20. Thus, for example, oil can be supplied to the oil chamber 262a of the hydraulic servo 262 without providing a seal ring between the input shaft 20 and the hydraulic servo 262. Furthermore, the hydraulic servos 261 and 265 can supply oil from the boss portions 3c and 3d extending from the case 3 without passing through other members, for example, a pair of seal rings 280. , 282 respectively, oil can be supplied. Therefore, the hydraulic servos 262, 261, and 265 can supply oil only by providing a pair of seal rings 281, 280, and 282, respectively, and can minimize sliding resistance caused by the seal rings. As a result, the efficiency of the automatic transmission ₁₆ can be improved.

Further, since the friction plate 275 is disposed on the radially outer side of the planetary gear PR, the automatic transmission ₁₆ can be made compact in the axial direction. Further, the planetary gear PR and the planetary gear unit PU can be disposed adjacent to each other by arranging the planetary gear PR between the hydraulic servo 265 of the clutch C3 and the planetary gear unit PU (the hydraulic servo of the clutch C3). 265 is not between the planetary gear PR and the planetary gear unit PU), the transmission member 240 can be made relatively short. As a result, the automatic transmission ₁₆ can be made compact and light, and the inertia (inertia force) can be reduced, so that the controllability of the automatic transmission ₁₆ can be improved. And the occurrence of shift shock can be reduced.

Further, since the planetary gear PR is a double pinion planetary gear, the rotation of the input shaft 20 can be output as a reduced rotation, and even if the gear ratio of the automatic transmission ₁₆ is set well, the planetary gear unit, the reduction planetary gear, and the like. Therefore, the automatic transmission ₁₆ can be made compact.

  Further, the planetary gear PR is configured to include a sun gear S1 that is an input rotation element, a carrier CR1 that is a fixed element, and a ring gear R1 that is an output rotation element, so that the rotation of the input shaft 20 is reduced. Can be output.

  The planetary gear unit PU is a Ravigneaux type planetary gear constituted by the sun gear S2, the sun gear S3, the carrier CR2, and the ring gear R2. Therefore, for example, it is possible to enable 6 forward speeds and 1 reverse speed. However, the planetary gear PR and the planetary gear unit PU can be disposed close to each other, and the transmission member 240 that transmits the reduced speed rotation can be made relatively short.

  Further, since the one-way clutch F3 arranged in parallel with the brake B2 and restricting the rotation of the carrier CR2 in one direction is provided, for example, the first forward speed at the time of positive driving is achieved by the engagement of the clutch C1 and the one-way clutch F3. Therefore, for example, the first forward speed when switching from the non-traveling range to the traveling range can be achieved smoothly.

  Further, since the brake B2 and the one-way clutch F3 are disposed on the outer peripheral side of the planetary gear unit PU, for example, the one-way clutch F3 is disposed adjacent to the clutch C2 (especially for restricting rotation in one direction of the hub member 223). Compared to the case, the portion where the clutches C1 and C2 are disposed can be made compact in the axial direction, so that the counter gear 50 can be brought closer to the torque converter side. Thereby, the gear 51 of the countershaft 52 can be brought closer to the torque converter side, and the countershaft portion 4 can be made compact in the axial direction.

Further, as shown in the speed diagram, the planetary gear PR and the planetary gear unit PU can be arranged close to each other, while being able to achieve the sixth forward speed and the first reverse speed, the transmission for transmitting the reduced speed rotation. The member 240 can be made relatively short. As a result, the automatic transmission ₁₆ can be made compact and light, and the inertia (inertia force) can be reduced, so that the controllability of the automatic transmission ₁₆ can be improved. And the occurrence of shift shock can be reduced.

  Further, the sixth forward speed and the first reverse speed are achieved, and both the clutches C1 and C2 are engaged with the fourth forward speed, that is, the direct forward state is established at the fourth forward speed. The gear ratio at the 6th forward speed can be set high, and especially when mounted on a vehicle, the engine speed can be lowered in a vehicle that travels at a high vehicle speed. It can contribute to silence.

Further, as a drive wheel transmission mechanism, a counter gear that has a differential portion 5 that outputs rotation to the drive wheel and a counter shaft portion 4 that engages with the differential portion 5, and an output member meshes with the counter shaft portion 4. Therefore, the automatic transmission ₁₆ can be mounted on, for example, an FF vehicle.

< Fourth Reference Example >
Hereinafter, a fourth reference example in which the second embodiment is partially changed will be described with reference to FIGS. Figure 23 is a schematic sectional view showing an automatic speed change mechanism of an automatic transmission according to the fourth reference example, FIG. 24 operation table of an automatic transmission according to the fourth reference example, FIG. 25 according to the fourth reference example It is a speed diagram of an automatic transmission. Note that, in the fourth reference example , the same reference numerals are given to the same parts as those in the second embodiment except for some changes, and the description thereof is omitted.

As shown in FIG. 23, the automatic transmission mechanism 2 ₇ of the automatic transmission 1 according to the fourth reference example, the automatic speed change mechanism 2 ₅ of the second embodiment (see FIG. 19), a planetary gear PR The arrangement with the clutch C3 is changed.

In the automatic speed change mechanism 2 _7, the clutch (third clutch) C3, the planetary gear (reduced rotation output means, the speed reduction planetary gear) of PR, is arranged on the opposite side (the left side in the drawing) of the planetary gear unit PU The inner peripheral side of the tip of the drum-shaped member 331 of the clutch C3 is spline-engaged with the friction plate 275. Further, the drum-shaped member 331 of the clutch C3 is connected to the input shaft 20.

  On the other hand, the sun gear (input rotation element, first sun gear) S1 is rotatably supported by the input shaft 20 and is connected to the hub member 332, and on the outer peripheral side of the distal end portion of the hub member 332, The friction plate 275 is in spline engagement. The carrier (fixing element, first carrier) CR1 is fixedly supported by the case 3b with a fixing member 330 connected to its side plate. The friction plate 274 of the brake B1 is spline-engaged with the outer peripheral side of the ring gear (output rotation element, first ring gear) R1, and the transmission member 340 is connected to the ring gear R1. The sun gear S3 is connected via

  The oil chamber 265a of the hydraulic servo 265 for the clutch C3 communicates with the oil passages 20c and 20d formed in the input shaft 20, and the oil passage 20c is an oil passage 293 of the boss portion 3d of the case 3. Communicating with The oil passage 293 communicates with a hydraulic control device (not shown). That is, since the hydraulic servo 265 is disposed on the input shaft 20, a pair of seal rings 283 that seal between the boss portion 3 d of the case 3 and the input shaft 20 are provided from a hydraulic control device (not shown). An oil passage to the oil chamber 265a is configured.

Subsequently, based on the above configuration, FIG. 23 for the operation of the automatic speed change mechanism 2 ₇ will be described with reference to FIGS. 24 and 25. As in the second embodiment, in the velocity diagram shown in FIG. 25, the vertical axis indicates the rotational speed of each rotating element, and the horizontal axis corresponds to the gear ratio of these rotating elements. Show. Further, in the planetary gear unit PU of the velocity diagram, the vertical axis at the end in the horizontal direction (right side in FIG. 25) is the sun gear S3, and thereafter the vertical axis is the carrier CR2 and the ring gear in order to the left side in the figure. It corresponds to R2 and sun gear S2.

  As shown in FIG. 23, when the clutch C3 is engaged, the rotation of the input shaft 20 is input to the sun gear S1. The carrier CR1 is fixed in rotation with respect to the case 3, and the ring gear R1 rotates at a reduced speed based on the rotation of the input shaft 20 input to the sun gear S1. That is, the sun gear S3 receives the reduced rotation of the ring gear R1 via the transmission member 340 when the clutch C3 is engaged.

  Then, as shown in FIGS. 21 and 22, in the planetary gear PR, at the third forward speed, the fifth forward speed, and the first reverse speed, the clutch C3 is engaged so that the input shaft 20 rotates to the sun gear S1. The reduced rotation is output to the ring gear R3 by the input and fixed carrier CR1, and the reduced rotation is input to the sun gear S3 via the transmission member 340. At this time, since the ring gear R1 and the sun gear S3 rotate at a reduced speed, the transmission member 340 transmits a relatively large torque. On the other hand, in the first forward speed, the second forward speed, the fourth forward speed, and the sixth forward speed, the rotation of the sun gear S3 is input to the ring gear R1 via the transmission member 340, and the clutch C3 is released. As shown in FIG. 25, the sun gear S1 rotates based on the rotation of the ring gear R1 at each shift stage and the fixed carrier CR1.

Since the operation other than the planetary gear PR is the same as that of the second embodiment described above, the description thereof is omitted.

As described above, according to the automatic speed change mechanism 2 ₇ according to the reference example, the planetary gear PR, the clutch C3, and one axial side of the transmission member 340 the planetary gear unit PU (in FIG. 23 left side) as the reduced rotation output means The clutch C1 and the clutch C2 are arranged on the other side in the axial direction of the planetary gear unit PU (right side in FIG. 23), and the counter gear 50 as an output member is connected to the clutch C1 and the clutch C2 and the planetary gear unit PU. In particular, the planetary gear PR and the planetary gear unit PU can be arranged close to each other, and the axial length of the transmission member 340 for transmitting the reduced rotation can be made relatively short. it can. Thereby, compactness of the automatic transmission 1 _7, it is possible to allow the weight reduction, further, it is possible to reduce the inertia (the inertia force) by weight of the transmission member 340, the automatic transmission 1 ₇ Controllability can be improved and occurrence of shift shock can be reduced.

Further, since the clutch C2 is connected to the carrier CR2 through the outer peripheral side of the clutch C1, it is possible to prevent complication of members for connecting the rotating elements, and the automatic transmission ₁₇ can be made compact.

  Further, the clutch C1 has a structure in which the clutch C2 is disposed on the outer peripheral side thereof and cannot be expanded in diameter on the outer peripheral side. However, by providing the hydraulic servo 262 on the input shaft 20 (for example, on the boss 3c) The pressure receiving area of the hydraulic servo 262, in particular, the hydraulic chamber 262a for the hydraulic servo 262 can be ensured largely on the inner peripheral side, and the capacity of the clutch C1 can be increased.

In addition, since the planetary gear PR, the planetary gear unit PU, and the counter gear 50 are provided coaxially with the input shaft 20, particularly when the automatic transmission ₁₇ is mounted on an FF vehicle (for example, a reduction planetary gear or the like on the other shaft). The drive wheel transmission mechanism (for example, the countershaft portion 4) can be made compact, compared with the case where the automatic transmission ₁₇ can be mounted on the vehicle. Can be improved.

Further, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2001-263438, when the clutch C3 is interposed between the ring gear R1 and the sun gear S3, it is necessary to connect and disconnect the reduced speed rotation, which is relatively large. Although it becomes a thing and the space between the planetary gear PR and the planetary gear unit PU spreads, the rotation of the input shaft 20 by the clutch C3 is connected / disconnected by being interposed between the input shaft 20 and the sun gear S1. Thus, the reduced speed rotation output from the ring gear R1 of the planetary gear PR is connected / disconnected, so that the clutch C3 can be made compact and the planetary gear PR and the planetary gear unit PU can be arranged at relatively close positions. Thereby, the automatic transmission ₁₇ can be made compact.

Since the hydraulic servos 262 and 265 are provided on the input shaft 20, the oil passages 20 a, 20 b and 20 c provided in the input shaft 20 are leak-tight from the case 3 by a pair of seal rings 281 and 283. , 20d can supply oil to the oil chambers 262a, 265a of the hydraulic servos 262, 265 without providing a seal ring between the hydraulic servos 262, 265 and the input shaft 20, for example. it can. Furthermore, each of the hydraulic servos 261 can supply oil from the boss portions 3c extending from the case 3 without passing through other members, for example, a pair of seal rings 280 are provided. With this, oil can be supplied. Therefore, the hydraulic servos 262, 261, and 265 can supply oil only by providing a pair of seal rings 281, 280, and 283, respectively, and can minimize sliding resistance caused by the seal rings. Thus, the efficiency of the automatic transmission ₁₇ can be improved. Furthermore, hydraulic servos 262 and 265 are arranged on the input shaft 20, and are arranged separately on one end side (right side in FIG. 23) and the other end side (left side in FIG. 23) of the input shaft 20. Therefore, it is not necessary to provide an oil passage for the hydraulic servo (for example, the oil passage 20a and the oil passage 20c) in the input shaft 20, so that the input shaft 20 can be made thin and the automatic transmission ₁₇ can be made compact. Can be.

Further, since the planetary gear PR is a double pinion planetary gear, the rotation of the input shaft 20 can be output as a reduced rotation, and even if the gear ratio of the automatic transmission ₁₇ is set well, the planetary gear unit, the reduction planetary gear Therefore, the automatic transmission ₁₇ can be made compact.

  Further, the planetary gear PR is configured to include a sun gear S1 that is an input rotation element, a carrier CR1 that is a fixed element, and a ring gear R1 that is an output rotation element, so that the rotation of the input shaft 20 is reduced. Can be output.

  The planetary gear unit PU is a Ravigneaux type planetary gear constituted by the sun gear S2, the sun gear S3, the carrier CR2, and the ring gear R2. Therefore, for example, it is possible to enable 6 forward speeds and 1 reverse speed. However, the planetary gear PR and the planetary gear unit PU can be arranged close to each other, and the transmission member 340 that transmits the reduced speed rotation can be made relatively short.

  Further, since the one-way clutch F3 arranged in parallel with the brake B2 and restricting the rotation of the carrier CR2 in one direction is provided, for example, the first forward speed at the time of positive driving is achieved by the engagement of the clutch C1 and the one-way clutch F3. Therefore, for example, the first forward speed when switching from the non-traveling range to the traveling range can be achieved smoothly.

  Further, since the brake B2 and the one-way clutch F3 are disposed on the outer peripheral side of the planetary gear unit PU, for example, the one-way clutch F3 is disposed adjacent to the clutch C2 (especially for restricting rotation in one direction of the hub member 223). Compared to the case, the portion where the clutches C1 and C2 are disposed can be made compact in the axial direction, so that the counter gear 50 can be brought closer to the torque converter side. Thereby, the gear 51 of the countershaft 52 can be brought closer to the torque converter side, and the countershaft portion 4 can be made compact in the axial direction.

Further, as shown in the speed diagram, the planetary gear PR and the planetary gear unit PU can be arranged close to each other, while being able to achieve the sixth forward speed and the first reverse speed, the transmission for transmitting the reduced speed rotation. The member 340 can be made relatively short. As a result, the automatic transmission ₁₇ can be made compact and lightweight, and the inertia (inertia force) can be reduced, so that the controllability of the automatic transmission ₁₇ can be improved. And the occurrence of shift shock can be reduced.

  Further, the sixth forward speed and the first reverse speed are achieved, and both the clutches C1 and C2 are engaged with the fourth forward speed, that is, the direct forward state is established at the fourth forward speed. The gear ratio at the 6th forward speed can be set high, and especially when mounted on a vehicle, the engine speed can be lowered in a vehicle that travels at a high vehicle speed. It can contribute to silence.

Further, as a drive wheel transmission mechanism, a counter gear that has a differential portion 5 that outputs rotation to the drive wheel and a counter shaft portion 4 that engages with the differential portion 5, and an output member meshes with the counter shaft portion 4. Therefore, the automatic transmission ₁₇ can be mounted on, for example, an FF vehicle.

< Fifth Reference Example >
Hereinafter, a fifth reference example in which the second embodiment is partially changed will be described with reference to FIGS. Figure 26 is according to the operation table, reference example of FIG. 28 is a fifth schematic cross-sectional view showing an automatic transmission mechanism, FIG. 27 is an automatic transmission according to a fifth reference example of an automatic transmission according to the fifth reference example It is a speed diagram of an automatic transmission. In the fifth reference example , the same reference numerals are given to the same parts as those in the second embodiment, except for some changes, and the description thereof is omitted.

As shown in FIG. 26, the automatic transmission mechanism 2 ₈ of the automatic transmission 1 according to the fifth reference example, the automatic speed change mechanism 2 ₅ of the second embodiment (see FIG. 19), the clutch C3 Instead, a brake (third brake) B3 is disposed, and the carrier (fixing element, first carrier) CR1 of the planetary gear PR is freely fixed by the brake B3.

In the automatic speed change mechanism 2 _7, the brake B3 is the planetary gear (reduced rotation output means, the speed reduction planetary gear) of PR, is arranged on the opposite side (the left side in the drawing) of the planetary gear unit PU. The brake B3 includes a hydraulic servo 266, a friction plate 276, and a hub member 432. The hydraulic servo 266 is formed on a piston member 266b for pressing the friction plate 276 and a part of the case 3b. A cylinder portion 266e, an oil chamber 266a formed by sealing between the piston member 266b and the cylinder portion 266e by seal rings 266f and 266g, and the piston member 266b are urged toward the oil chamber 266a. A return spring 266c and a return plate 266d that receives the biasing force of the return spring 266c are configured.

  The hub member 432 of the brake B3 is connected to one side plate of the carrier CR1, and the other side plate 434 of the carrier CR1 is rotatably supported by the input shaft 20. The sun gear (input rotation element, first sun gear) S <b> 1 is connected to the input shaft 20. The friction plate 274 of the brake B1 is spline-engaged with the outer peripheral side of the ring gear (output rotation element, first ring gear) R1, and the transmission member 440 is connected to the ring gear R1. The sun gear S3 is connected via

Subsequently, based on the above configuration, FIG. 26 for the operation of the automatic speed change mechanism 2 ₈ will be described with reference to FIGS. 27 and 28. As in the second embodiment, in the velocity diagram shown in FIG. 28, the vertical axis indicates the rotational speed of each rotating element, and the horizontal axis corresponds to the gear ratio of these rotating elements. Show. Further, in the planetary gear unit PU of the velocity diagram, the vertical axis at the end in the lateral direction (right side in FIG. 28) is the sun gear S3, and thereafter the vertical axis is the carrier CR2 and the ring gear in order to the left side in the figure. It corresponds to R2 and sun gear S2.

  As shown in FIG. 26, when the brake B3 is locked, the carrier CR1 is fixed to the case 3b. The rotation of the input shaft 20 is input to the sun gear S1, and the ring gear R1 rotates at a reduced speed based on the rotation of the input shaft 20 input to the sun gear S1 when the carrier CR1 is fixed. . That is, the sun gear S3 receives the reduced rotation of the ring gear R1 through the transmission member 440 when the brake B3 is engaged.

  Then, as shown in FIGS. 27 and 28, in the planetary gear PR, at the third forward speed, the fifth forward speed, and the first reverse speed, the brake B3 is locked to fix the carrier CR1, and the input shaft 20 The rotation of the sun gear S1 to which the rotation is input is output to the ring gear R3, and the reduced rotation is input to the sun gear S3 via the transmission member 440. At this time, since the ring gear R1 and the sun gear S3 are rotating at a reduced speed, the transmission member 440 transmits a relatively large torque. On the other hand, in the first forward speed, the second forward speed, the fourth forward speed, and the sixth forward speed, the rotation of the sun gear S3 is input to the ring gear R1 via the transmission member 440, and the brake B3 is released. As shown at 28, the carrier CR1 rotates on the basis of the rotation of the ring gear R1 at the respective gears and the sun gear S1 of the input shaft 20.

Since the operation other than the planetary gear PR is the same as that of the second embodiment described above, the description thereof is omitted.

As described above, according to the automatic speed change mechanism 2 ₈ according to the reference example, the planetary gear PR, the brake B3, and the one axial side of the transmission member 440 the planetary gear unit PU (in Figure 26 the left side) of the reduced rotation output means The clutch C1 and the clutch C2 are arranged on the other side in the axial direction of the planetary gear unit PU (right side in FIG. 26), and the counter gear 50 as an output member is connected to the clutch C1 and the clutch C2 and the planetary gear unit PU. In particular, the planetary gear PR and the planetary gear unit PU can be arranged close to each other, and the axial length of the transmission member 340 for transmitting the reduced rotation can be made relatively short. it can. Thereby, compactness of the automatic transmission 1 ₈ can enable weight reduction, further, it is possible to reduce the inertia (the inertia force) by weight of the transmission member 440, the automatic transmission 1 ₈ Controllability can be improved and occurrence of shift shock can be reduced.

Further, since the clutch C2 is connected to the carrier CR2 through the outer peripheral side of the clutch C1, it is possible to prevent complication of members for connecting the rotating elements, and the automatic transmission ₁₈ can be made compact.

  Further, the clutch C1 has a structure in which the clutch C2 is disposed on the outer peripheral side thereof and cannot be expanded in diameter on the outer peripheral side. However, by providing the hydraulic servo 262 on the input shaft 20 (for example, on the boss 3c) The pressure receiving area of the hydraulic servo 262, in particular, the hydraulic chamber 262a for the hydraulic servo 262 can be ensured largely on the inner peripheral side, and the capacity of the clutch C1 can be increased.

In addition, since the planetary gear PR, the planetary gear unit PU, and the counter gear 50 are provided coaxially with the input shaft 20, particularly when the automatic transmission ₁₈ is mounted on an FF vehicle (for example, a reduction planetary gear or the like on the other shaft). The drive wheel transmission mechanism (for example, the countershaft portion 4) can be made compact, compared with, for example, interference with the vehicle body member, and the vehicle mountability of the automatic transmission ₁₈ can be improved. Can be improved.

Further, since the output of the reduced speed rotation is connected / disconnected by the engagement of the brake B3, for example, the brake B3 can be made more compact than the clutch that connects / disconnects the reduced speed rotation, and the planetary gear PR and the planetary gear unit PU Can be placed in close proximity to each other. Thereby, the automatic transmission ₁₈ can be made compact and lightweight.

Further, since the hydraulic servo 262 is provided on the input shaft 20, leakage is prevented from the case 3 by a pair of seal rings 281 and oil is supplied to the oil passages 20 a and 20 b provided in the input shaft 20. Thus, for example, oil can be supplied to the oil chamber 262a of the hydraulic servo 262 without providing a seal ring between the input shaft 20 and the hydraulic servo 262. Furthermore, each of the hydraulic servos 261 can supply oil from the boss portions 3c extending from the case 3 without passing through other members, for example, a pair of seal rings 280 are provided. With this, oil can be supplied. Therefore, the hydraulic servos 262 and 261 can supply oil only by providing a pair of seal rings 281 and 280, respectively, and can minimize sliding resistance caused by the seal rings. The efficiency of the machine ₁₈ can be improved.

Further, since the planetary gear PR is a double pinion planetary gear, the rotation of the input shaft 20 can be output as a reduced rotation, and even if the gear ratio of the automatic transmission ₁₈ is set well, the planetary gear unit, the reduction planetary gear, and the like. Therefore, the automatic transmission ₁₈ can be made compact.

  Further, the planetary gear PR is configured to include a sun gear S1 that is an input rotation element, a carrier CR1 that is a fixed element, and a ring gear R1 that is an output rotation element, so that the rotation of the input shaft 20 is reduced. Can be output.

  The planetary gear unit PU is a Ravigneaux type planetary gear constituted by the sun gear S2, the sun gear S3, the carrier CR2, and the ring gear R2. Therefore, for example, it is possible to enable 6 forward speeds and 1 reverse speed. However, the planetary gear PR and the planetary gear unit PU can be disposed close to each other, and the transmission member 440 that transmits the reduced speed rotation can be made relatively short.

  Further, since the one-way clutch F3 arranged in parallel with the brake B2 and restricting the rotation of the carrier CR2 in one direction is provided, for example, the first forward speed at the time of positive driving is achieved by the engagement of the clutch C1 and the one-way clutch F3. Therefore, for example, the first forward speed when switching from the non-traveling range to the traveling range can be achieved smoothly.

  Further, since the brake B2 and the one-way clutch F3 are disposed on the outer peripheral side of the planetary gear unit PU, for example, the one-way clutch F3 is disposed adjacent to the clutch C2 (especially for restricting rotation in one direction of the hub member 223). Compared to the case, the portion where the clutches C1 and C2 are disposed can be made compact in the axial direction, so that the counter gear 50 can be brought closer to the torque converter side. Thereby, the gear 51 of the countershaft 52 can be brought closer to the torque converter side, and the countershaft portion 4 can be made compact in the axial direction.

Further, as shown in the speed diagram, the planetary gear PR and the planetary gear unit PU can be arranged close to each other, while being able to achieve the sixth forward speed and the first reverse speed, the transmission for transmitting the reduced speed rotation. The member 440 can be made relatively short. As a result, the automatic transmission ₁₈ can be made compact and light, and the inertia (inertia force) can be reduced, so that the controllability of the automatic transmission ₁₈ can be improved. And the occurrence of shift shock can be reduced.

  Further, the sixth forward speed and the first reverse speed are achieved, and both the clutches C1 and C2 are engaged with the fourth forward speed, that is, the direct forward state is established at the fourth forward speed. The gear ratio at the 6th forward speed can be set high, and especially when mounted on a vehicle, the engine speed can be lowered in a vehicle that travels at a high vehicle speed. It can contribute to silence.

Further, as a drive wheel transmission mechanism, a counter gear that has a differential portion 5 that outputs rotation to the drive wheel and a counter shaft portion 4 that engages with the differential portion 5, and an output member meshes with the counter shaft portion 4. Therefore, the automatic transmission ₁₈ can be mounted on, for example, an FF vehicle.

< Sixth Reference Example >
Hereinafter, a sixth reference example in which the first and second embodiments and the third reference example are partially changed will be described with reference to FIGS. 29 to 31. 29 according to the operation table, Figure 31 is a reference example of the sixth automatic transmission according to the schematic sectional view showing an automatic speed change mechanism of an automatic transmission according to the reference example 6, Figure 30 is a reference example of the sixth It is a speed diagram of an automatic transmission. Note that, in the sixth reference example , the same reference numerals are given to the same parts as those in the first and second embodiments and the third reference example except for some changes, and the description thereof is omitted.

First, it will be described with reference to FIG. 29 for the automatic transmission mechanism 2 ₉ of the automatic transmission 1 according to the reference example of the sixth. As shown in FIG. 29, the input shaft 20 has a planetary gear unit PU and a planetary gear (decelerated rotation output means, decelerated planetary gear) PR. The planetary gear unit PU includes four rotation elements, that is, a sun gear (third rotation element, second sun gear) S2, a carrier (second rotation element, second carrier) CR2, a ring gear (fourth rotation element, second rotation gear). A long pinion PL that is supported by the side plates 542 and 544 and meshes with the sun gear S2 and the ring gear R2; and a ring gear R2 and a sun gear (first rotating element, third sun gear) S3. This is a so-called Ravigneaux type planetary gear having a short pinion PS meshing with the sun gear S3 so as to mesh with each other. The planetary gear PR includes a carrier (fixed element, first carrier) CR1, a pinion P2 meshed with a ring gear (output rotating element, first ring gear) R1, and a sun gear (input rotating element, first sun gear) S1. This is a so-called double pinion planetary gear having pinions P1 meshing with each other.

  On the input shaft 20, on the inner peripheral side, a hydraulic servo 565, a friction plate 572, a drum-like member 522 forming a clutch drum (first clutch drum), and a hub member (second member) connected to the carrier CR2. And a drum that forms a hydraulic servo 262, a friction plate 571, and a clutch drum (second clutch drum) on the outer peripheral side thereof. A multi-plate clutch (second clutch) C2 having a member 524 and a hub member (member coupled to the third rotating element) 525 coupled to the sun gear S2 is disposed.

  The hydraulic servo 565 seals between a piston member (first piston) 565b for pressing the friction plate 272, a drum-shaped member 522 having a cylinder portion 565e, and the piston member 565b and the cylinder portion 565e. An oil chamber (first hydraulic servo hydraulic chamber) 565a formed by being sealed by the rings 565f and 565g, a return spring 565c for urging the piston member 565b toward the oil chamber 565a, and the return spring 565c And a return plate 565d for receiving the urging force. The oil chamber 565a communicates with oil passages 20a and 20b formed in the input shaft 20, and the oil passage 20a extends to one end of the case 3 and is provided in a sleeve shape on the input shaft 20. It communicates with the oil passage 591 of the boss 3c. The oil passage 591 communicates with a hydraulic control device (not shown). That is, since the hydraulic servo 565 is disposed on the input shaft 20, a pair of seal rings 581 that seal between the boss portion 3 c of the case 3 and the input shaft 20 are provided from a hydraulic control device (not shown). An oil passage to the oil chamber 565a is configured.

  The hydraulic servo 562 includes a piston member (second piston) 562b for pressing the friction plate 271; a drum-shaped member 524 having a cylinder member 562e; and the piston member 562b and the cylinder member 562e. An oil chamber (second hydraulic servo hydraulic chamber) 562a formed by being sealed by seal rings 562f and 562g, a return spring 562c for urging the piston member 562b toward the oil chamber 562a, and the return And a return plate 562d that receives the bias of the spring 562c. The oil chamber 562a communicates with an oil passage 592 of the boss portion 3c, and the oil passage 592 communicates with a hydraulic control device (not shown). That is, in the hydraulic servo 562, an oil path from a hydraulic control device (not shown) to the oil chamber 562a is configured by a pair of seal rings 580 that seal between the boss 3c of the case 3 and the cylinder member 562e. Yes.

  A multi-plate brake (third brake) B2 having a hydraulic servo 563 and a friction plate 574 is disposed on the outer peripheral side of the hub member 525. The hydraulic servo 563 includes a piston member 563b for pressing the friction plate 574, a cylinder portion 563e formed in a part of the case 3b, and a seal ring 563f, between the piston member 563b and the cylinder portion 563e. An oil chamber 563a that is sealed by 563g, a return spring 563c that biases the piston member 563b in the direction of the oil chamber 563a, and a return plate 563d that receives the bias of the return spring 563c. ing.

  That is, the drum-shaped member 522 is connected to the input shaft 20, and a clutch C 3 that can be engaged by a hydraulic servo 565 for the clutch C 3 is provided on the inner peripheral side of the front end of the drum-shaped member 522. It arrange | positions in the form engaged with a spline, and the inner peripheral side of this clutch C3 is connected to the hub member 523 in the form engaged with a spline. The hub member 523 is connected to the sun gear S2. A clutch C2 that can be engaged by a hydraulic servo 562 for the clutch C2 is arranged on the inner peripheral side of the tip of the drum-shaped member 524 in a spline engagement manner, and the inner peripheral side of the clutch C2 The hub member 525 is connected in a splined manner. On the outer peripheral side of the drum-shaped member 525, a brake B2 that can be locked by a hydraulic servo 563 for the brake B2 is arranged in a spline engagement manner. The hub member 525 is connected to the carrier CR2.

  On the other hand, on the other end (left side in the figure) of the input shaft 20, a multi-plate clutch (first clutch) having a hydraulic servo 561, a friction plate 575, and a drum-like member 531 forming a clutch drum (third clutch drum). 3 clutch) C1 is arranged. The hydraulic servo 561 is sealed by a piston member 561b for pressing the friction plate 575, a drum-like member 531 having a cylinder portion 561e, and seal rings 561f and 561g between the piston member 561b and the cylinder portion 561e. The oil chamber 561a is formed, a return spring 561c that urges the piston member 561b toward the oil chamber 561a, and a return plate 561d that receives the urging force of the return spring 561c. Note that the clutch drum formed of the drum-like member 531 opens in the direction of the planetary gear PR, and the planetary gear PR is disposed between the hydraulic servo 561 and the planetary gear unit PU in the axial direction. Further, the friction plate 575 is arranged at a position overlapping the radial outer diameter side of the planetary gear PR.

  The oil chamber 561a extends to the other end of the case 3 opposite to the boss 3c, and communicates with an oil passage 593 of a boss 3d provided on the input shaft 20 in a sleeve shape. The oil passage 593 communicates with a hydraulic control device (not shown). That is, the hydraulic servo 561 is connected from a hydraulic control device (not shown) to the oil chamber 561a by a pair of seal rings 582 that seals between the boss 3d of the case 3 and the drum-like member 532 having the cylinder 561e. An oil passage is constructed.

  That is, on the boss portion 3d, a drum-like member 531 is rotatably supported by the boss portion 3d on the left side in the drawing, and on the inner peripheral side of the tip end portion of the drum-like member 561, a clutch C1 is provided. The clutch C1, which can be engaged by the hydraulic servo 561, is arranged so as to engage with the spline. A hub member 532 on which the ring gear R1 is formed is arranged on the inner peripheral side of the clutch C1 so as to be spline-engaged, and the hub member 532 is rotatably supported by the boss portion 3d. . The carrier CR1 has a pinion P1 and a pinion P2. The pinion P2 meshes with the ring gear R1, and the pinion P1 meshes with a sun gear S1 connected to the input shaft 20. The carrier CR1 is fixed to the case 3b via a side plate 633.

  The drum-like member 531 to which the clutch C1 is spline-engaged is rotatably supported on the boss portion 3d, and a transmission member 540 that transmits the rotation of the ring gear R1 when the clutch C1 is engaged is connected. The sun gear S3 of the planetary gear unit PU is connected to the other side of the transmission member 540.

  On the other hand, on the outer peripheral side of the planetary gear unit PU, a multi-plate brake (second brake) B1 having a hydraulic servo 564, a friction plate 573, and a hub member 547 and a one-way clutch (first one-way clutch) F3 are arranged. Yes. The hydraulic servo 564 includes a piston member 564b for pressing the friction plate 573, a cylinder portion 564e formed in a part of the case 3b, and a seal ring 564f, between the piston member 564b and the cylinder portion 564e, An oil chamber 564a sealed by 564g, a return spring 564c that urges the piston member 564b in the direction of the oil chamber 564a, and a return plate 564d that receives the urging force of the return spring 564c. ing.

  That is, a hub member 547 in which the brake B2 is spline-engaged is connected to the side plate 542 of the carrier CR2 of the planetary gear unit PU, and the inner race of the one-way clutch F3 is connected to the hub member 547. Is connected. The ring gear R2 is meshed with the long pinion PL of the carrier CR2. A connecting member 545 is connected to one end of the ring gear R2, and the ring gear R2 is connected to the counter gear 50 via the connecting member 545. It is connected to.

  As described above, planetary gear PR is on one side of planetary gear unit PU in the axial direction, clutch C2, clutch C3 and brake B1 are on the other side in the axial direction, and between clutch C2, clutch C3 and brake B1 and planetary gear unit PU are on the other side. A counter gear 50 is disposed. The clutch C1 is disposed on the outer peripheral side of the planetary gear PR, and the brake B2 is disposed on the outer peripheral side of the planetary gear unit PU. The planetary gear PR, the planetary gear unit PU, and the counter gear 50 are configured to be coaxial with the input shaft 20.

Subsequently, based on the above configuration, FIG. 29 for the operation of the automatic speed change mechanism 2 ₉ will be described with reference to FIGS. 30 and 31. In the velocity diagram shown in FIG. 31, the vertical axis indicates the number of rotations of each rotary element, and the horizontal axis indicates the gear ratio of these rotary elements. Further, in the planetary gear unit PU portion of the velocity diagram, the vertical axis at the end in the horizontal direction (right side in FIG. 31) is the sun gear S3, and the vertical axis is the ring gear R2 and the carrier in order from the left side in the figure thereafter. It corresponds to CR2 and sun gear S2.

  As shown in FIG. 29, the rotation of the input shaft 20 is input to the sun gear S2 when the clutch C2 is engaged, and the rotation of the sun gear S1 can be fixed by the locking of the brake B1. Yes. The rotation of the input shaft 20 is input to the carrier CR2 when the clutch C3 is engaged, and the rotation of the carrier CR2 is freely fixed by the locking of the brake B2, and the one-way clutch F3. Therefore, the rotation in one direction is restricted.

  On the other hand, the sun gear S1 is connected to the input shaft 20, the rotation of the input shaft 20 is input, and the carrier CR1 is connected to the case 3b and the rotation is fixed, whereby the ring gear R1 is Decelerate and rotate. Further, when the clutch C1 is engaged, the reduced rotation of the ring gear R1 is input to the sun gear S3.

  The rotation of the ring gear R2 is output to the counter gear 50, and is output to a driving wheel (not shown) via the counter gear 50, the counter shaft portion 4 and the differential portion 5 (see FIG. 1).

  At the first forward speed in the D (drive) range, as shown in FIG. 30, the clutch C1 and the one-way clutch F3 are engaged. Then, as shown in FIG. 31, the reduced rotation of the ring gear R1 is input to the sun gear S3 via the clutch C1 and the transmission member 540. Further, the rotation of the carrier CR2 is restricted in one direction (forward rotation direction), that is, the carrier CR2 is prevented from rotating in the reverse direction and is fixed. The ring gear R2 is rotated forward as the first forward speed by the reduced rotation input to the sun gear S3 and the fixed carrier CR2, and the rotation is output from the counter gear 50.

  During engine braking (coasting), the brake B1 is locked to fix the carrier CR2, and the forward first speed state is maintained by preventing the carrier CR2 from rotating forward. Further, at the first forward speed, the one-way clutch F3 prevents the carrier CR2 from rotating in the reverse direction and enables the forward rotation, so that, for example, the first forward speed when switching from the non-traveling range to the traveling range is achieved. Can be smoothly performed by automatic engagement of the one-way clutch. At this time, since the sun gear S3 and the ring gear R1 are rotating at a reduced speed, the transmission member 540 transmits a relatively large torque.

  At the second forward speed in the D (drive) range, as shown in FIG. 30, the clutch C1 is engaged and the brake B2 is locked. Then, as shown in FIG. 31, the reduced rotation of the ring gear R1 is input to the sun gear S3 via the clutch C1 and the transmission member 540, and the rotation of the sun gear S2 is fixed by the brake B2. Accordingly, the carrier CR2 is slightly decelerated and rotated, and the ring gear R2 is rotated forward as the second forward speed by the decelerated rotation input to the sun gear S3 and the slightly decelerated rotation of the carrier CR2. Output from the counter gear 50. Also in this case, since the sun gear S3 and the ring gear R1 rotate at a reduced speed, the transmission member 540 transmits a relatively large torque.

  In the third forward speed in the D (drive) range, as shown in FIG. 30, the clutch C1 and the clutch C2 are engaged. Then, as shown in FIG. 31, the reduced rotation of the ring gear R1 is input to the sun gear S3 via the clutch C1 and the transmission member 540, and the rotation of the input shaft 20 is input to the sun gear S2 by the engagement of the clutch C2. . Then, due to the rotation of the input shaft 20 input to the sun gear S2 and the reduced rotation of the sun gear S3, the carrier CR2 is decelerated slightly larger than the reduced rotation of the sun gear S3. Then, due to the input rotation of the sun gear S2 and the decelerated rotation of the sun gear S3, the ring gear R2 becomes a forward rotation as the third forward speed, and the rotation is output from the counter gear 50. Also in this case, since the sun gear S3 and the ring gear R1 rotate at a reduced speed, the transmission member 540 transmits a relatively large torque.

  In the fourth forward speed in the D (drive) range, as shown in FIG. 30, the clutch C1 and the clutch C3 are engaged. Then, as shown in FIG. 31, the reduced rotation of the ring gear R1 is input to the sun gear S3 via the clutch C1 and the transmission member 540, and the rotation of the input shaft 20 is input to the carrier CR2 via the clutch C3. Then, due to the rotation of the input shaft 20 input to the carrier CR2 and the reduced rotation of the sun gear S3, the ring gear R2 is rotated forward as the fourth forward speed, and the rotation is output from the counter gear 50. Also in this case, since the sun gear S3 and the ring gear R1 rotate at a reduced speed, the transmission member 540 transmits a relatively large torque.

  At the fifth forward speed in the D (drive) range, as shown in FIG. 30, the clutch C2 and the clutch C3 are engaged. Then, as shown in FIG. 31, the rotation of the input shaft 20 is input to the carrier CR2 via the clutch C3, and the rotation of the input shaft 20 is input to the sun gear S2 via the clutch C2. Then, the rotation of the input shaft 20 input to the sun gear S2 and the rotation of the input shaft 20 input to the carrier CR2, that is, the ring gear R2 is in a directly connected rotation state, and the input shaft 20 is connected to the input shaft 20 as the fifth forward speed. The forward rotation is the same rotation, and the rotation is output from the counter gear 50.

  At the sixth forward speed in the D (drive) range, as shown in FIG. 30, the clutch C3 is engaged and the brake B2 is locked. Then, as shown in FIG. 31, the rotation of the input shaft 20 is input to the carrier CR2 via the clutch C3, and the rotation of the sun gear S2 is fixed by the locking of the brake B2. Then, due to the rotation of the input shaft 20 input to the carrier CR2 and the fixed sun gear S2, the ring gear R2 is increased in speed as the sixth forward speed, and the rotation is output from the counter gear 50.

  In the first reverse speed in the R (reverse) range, as shown in FIG. 30, the clutch C2 is engaged and the brake B1 is locked. Then, as shown in FIG. 31, the rotation of the input shaft 20 is input to the sun gear S2 by the engagement of the clutch C2, and the rotation of the carrier CR2 is fixed by the locking of the brake B1. Then, the rotation of the input shaft 20 input to the sun gear S2 and the fixed carrier CR2 causes the ring gear R2 to perform reverse rotation as the first reverse speed, and the rotation is output from the counter gear 50.

In the P (parking) range and the N (neutral) range, in particular, the clutch C1, the clutch C2, and the clutch C3 are disengaged, the power transmission between the input shaft 20 and the counter gear 50 is in a disconnected state, and automatic shifting is performed. mechanism becomes idle state (neutral state) as a whole 2 _9. Incidentally, the brake B1 for fixing the carrier CR2 is locked, this is intended to prevent the repetition of frequent locking and releasing of the brakes B1, especially other rotation of the automatic transmission mechanism 2 ₉ It does not affect the rotation state of the element.

As described above, according to the automatic transmission mechanism 2 ₉ according to the present invention, the planetary gear PR, the clutch C1, and one axial side of the transmission member 540 the planetary gear unit PU (in FIG. 29 left side) as the reduced rotation output means The clutch C2 and the clutch C3 are arranged on the other side in the axial direction of the planetary gear unit PU (right side in FIG. 29), and the counter gear 50 as an output member is connected to the clutch C2 and the clutch C3 and the planetary gear unit PU. In particular, the planetary gear PR and the planetary gear unit PU can be arranged close to each other, and the axial length of the transmission member 540 for transmitting the reduced speed rotation can be made relatively short. it can. Thereby, compactness of the automatic transmission 1 _9, can enable weight reduction, further, it is possible to reduce the inertia (the inertia force) by weight of the transmission member 540, the automatic transmission 1 ₉ Controllability can be improved and occurrence of shift shock can be reduced.

Further, since the clutch C2 is connected to the carrier CR2 through the outer peripheral side of the clutch C3, it is possible to prevent complication of members for connecting the rotating elements, and the automatic transmission ₁₉ can be made compact.

  Furthermore, the clutch C3 has a structure in which the clutch C2 is disposed on the outer peripheral side thereof and cannot be expanded in diameter on the outer peripheral side. However, by providing the hydraulic servo 565 on the input shaft 20 (for example, on the boss 3c) The pressure receiving area of the hydraulic servo 565, in particular, the oil chamber 565a for the hydraulic servo 565 can be secured large on the inner peripheral side, and the capacity of the clutch C3 can be increased.

In addition, since the planetary gear PR, the planetary gear unit PU, and the counter gear 50 are provided coaxially with the input shaft 20, particularly when the automatic transmission ₁₉ is mounted on an FF vehicle (for example, a reduction planetary gear or the like on the other shaft). The drive wheel transmission mechanism (for example, the countershaft portion 4) can be made compact, compared with, for example, interference with the vehicle body member, and the vehicle mountability of the automatic transmission ₁₉ can be reduced. Can be improved.

Further, since the clutch C1 connects / disconnects the output of the reduced speed rotation, the reduced speed rotation can be freely output to the sun gear S3, but the input shaft that is input to the sun gear S1 by releasing the clutch C1. Can be idled by the planetary gear PR, particularly the ring gear R1. As a result, the carrier CR1 can be directly fixed to the case 3 or the like without providing a brake, and the automatic transmission ₁₉ can be made compact and lightweight.

Further, since the hydraulic servo 565 is provided on the input shaft 20, leakage is prevented from the case 3 by a pair of seal rings 281 and oil is supplied to the oil passages 20 a and 20 b provided in the input shaft 20. Thus, for example, oil can be supplied to the oil chamber 565a of the hydraulic servo 565 without providing a seal ring between the input shaft 20 and the hydraulic servo 565. Further, the hydraulic servos 562 and 561 can supply oil from the boss portions 3c and 3d extending from the case 3, respectively, without passing through other members, for example, a pair of seal rings 580. , 582 can be provided to supply oil. Therefore, the hydraulic servos 565, 562, and 561 can supply oil only by providing a pair of seal rings 581, 580, and 582, respectively, and can minimize sliding resistance caused by the seal rings. Thus, the efficiency of the automatic transmission ₁₉ can be improved.

Further, since the friction plate 575 is disposed on the outer peripheral side in the radial direction of the planetary gear PR, the automatic transmission ₁₉ can be made compact in the axial direction. In addition, by arranging the planetary gear PR between the hydraulic servo 561 of the clutch C1 and the planetary gear unit PU in the axial direction, the planetary gear PR and the planetary gear unit PU can be arranged adjacent to each other (hydraulic servo of the clutch C1). Since 561 is not between the planetary gear PR and the planetary gear unit PU), the transmission member 540 can be made relatively short. As a result, the automatic transmission ₁₉ can be made compact and light, and the inertia (inertial force) can be reduced, so that the controllability of the automatic transmission ₁₉ can be improved. And the occurrence of shift shock can be reduced.

Further, since the planetary gear PR is a double pinion planetary gear, the rotation of the input shaft 20 can be output as a reduced rotation, and even if the gear ratio of the automatic transmission ₁₉ is set well, the planetary gear unit, the reduction planetary gear Therefore, the automatic transmission ₁₉ can be made compact.

  Further, the planetary gear PR is configured to include a sun gear S1 that is an input rotation element, a carrier CR1 that is a fixed element, and a ring gear R1 that is an output rotation element, so that the rotation of the input shaft 20 is reduced. Can be output.

  The planetary gear unit PU is a Ravigneaux type planetary gear constituted by the sun gear S2, the sun gear S3, the carrier CR2, and the ring gear R2. Therefore, for example, it is possible to enable 6 forward speeds and 1 reverse speed. However, the planetary gear PR and the planetary gear unit PU can be disposed close to each other, and the transmission member 540 that transmits the reduced speed rotation can be made relatively short.

  In addition, since the one-way clutch F3 that is arranged in parallel with the brake B1 and restricts the rotation of the carrier CR2 in one direction is provided, for example, the first forward speed during the positive drive is achieved by the engagement of the clutch C1 and the one-way clutch F3. Therefore, for example, the first forward speed when switching from the non-traveling range to the traveling range can be achieved smoothly.

  Further, since the brake B1 and the one-way clutch F3 are disposed on the outer peripheral side of the planetary gear unit PU, for example, the one-way clutch F3 is disposed adjacent to the clutch C2 (especially for restricting rotation in one direction of the hub member 523). Compared to the case, the portion where the clutches C1 and C2 are disposed can be made compact in the axial direction, so that the counter gear 50 can be brought closer to the torque converter side. Thereby, the gear 51 of the countershaft 52 can be brought closer to the torque converter side, and the countershaft portion 4 can be made compact in the axial direction.

Further, as shown in the speed diagram, the planetary gear PR and the planetary gear unit PU can be arranged close to each other, while being able to achieve the sixth forward speed and the first reverse speed, the transmission for transmitting the reduced speed rotation. The member 540 can be made relatively short. As a result, the automatic transmission ₁₉ can be made compact and light, and the inertia (inertial force) can be reduced, so that the controllability of the automatic transmission ₁₉ can be improved. And the occurrence of shift shock can be reduced.

Further, the present automatic speed change mechanism 2 ₉ becomes directly coupled at fifth forward speed, that is, the reduced rotation can be output over four stages up to the fourth forward speed from the first speed, in particular an automatic transmission mechanism 2 ₉ When mounted on a vehicle, it is possible to subdivide the shift in the low and medium speed region of the vehicle. As a result, particularly in the low / medium speed region of the vehicle, it becomes possible to use more of the rotational speed region that provides the best efficiency of the drive source such as the engine, and the fuel efficiency can be improved. Furthermore, since the direct connection state is established at the fifth forward speed, only the sixth forward speed can be overdriven. For example, the fifth forward speed and the sixth forward speed are established when the forward fourth speed is established. The final reduction gear ratio can be made smaller than that in which the stage is overdriven. Thereby, for example, the differential ring gear diameter of the differential portion 5 can be reduced, and the distance between the input shaft 20 and the shaft of the differential portion 5 can be shortened. The transmission ₁₉ can be made compact.

Further, as a drive wheel transmission mechanism, a counter gear that has a differential portion 5 that outputs rotation to the drive wheel and a counter shaft portion 4 that engages with the differential portion 5, and an output member meshes with the counter shaft portion 4. Therefore, the automatic transmission ₁₉ can be mounted on, for example, an FF vehicle.

< Seventh Reference Example >
Hereinafter, a seventh reference example in which the sixth reference example is partially changed will be described with reference to FIGS. 32 to 34. Figure 32 is operation table of an automatic transmission according to the schematic sectional view showing an automatic speed change mechanism of an automatic transmission according to the seventh reference example, FIG. 33 is a seventh reference example, FIG. 34 according to the seventh reference example It is a speed diagram of an automatic transmission. Note that, in the seventh reference example , the same reference numerals are given to the same parts as in the sixth reference example , except for some changes, and description thereof is omitted.

As shown in FIG. 32, the automatic transmission mechanism 2 ₁₀ of the automatic transmission 1 according to the seventh reference example, the automatic transmission mechanism 2 ₉ of the sixth reference example (see FIG. 29), planetary gear (reduced rotation The arrangement of the output means, the speed reduction planetary gear) PR and the clutch (third clutch) C1 is changed.

In the automatic speed change mechanism 2 _10, the clutch C1 is of the planetary gear PR, the planetary gear unit PU is disposed on the opposite side (the left side in the drawing), the tip inner peripheral side of the drum-shaped member 631 of the clutch C1 is The friction plate 575 is spline-engaged. The drum-shaped member 631 of the clutch C1 is connected to the input shaft 20.

  On the other hand, the sun gear (input rotation element, first sun gear) S1 is rotatably supported by the input shaft 20 and connected to the hub member 632, and on the outer peripheral side of the distal end portion of the hub member 632, The friction plate 575 is in spline engagement. The carrier (fixing element, first carrier) CR1 is fixedly supported by the case 3b with a fixing member 633 connected to its side plate. A transmission member 640 is connected to the ring gear (output rotation element, first ring gear) R1, and the sun gear S3 is connected via the transmission member 640.

Subsequently, based on the above configuration, FIG. 32 for the operation of the automatic speed change mechanism 2 ₁₀ will be described with reference to FIGS. 33 and 34. As in the sixth reference example , in the velocity diagram shown in FIG. 34, the vertical axis indicates the rotation speed of each rotating element, and the horizontal axis indicates the gear ratio of these rotating elements. ing. Further, in the planetary gear unit PU of the velocity diagram, the vertical axis at the lateral end (right side in FIG. 34) is the sun gear S3, and the vertical axes are the carrier CR2 and the ring gear in order from the left side to the left side in the figure. It corresponds to R2 and sun gear S2.

  As shown in FIG. 32, the rotation of the input shaft 20 is input to the sun gear S1 when the clutch C1 is engaged. The carrier CR1 is fixed in rotation with respect to the case 3, and the ring gear R1 rotates at a reduced speed based on the rotation of the input shaft 20 input to the sun gear S1. That is, the sun gear S3 receives the reduced rotation of the ring gear R1 through the transmission member 640 when the clutch C1 is engaged.

  Then, as shown in FIGS. 33 and 34, in the planetary gear PR, at the first forward speed, the second forward speed, the third forward speed, and the fourth forward speed, the clutch C1 is engaged, so that the input shaft 20 The rotation is input to the sun gear S1, the decelerated rotation is output to the ring gear R3 by the fixed carrier CR1, and the decelerated rotation is input to the sun gear S3 via the transmission member 640. At this time, since the ring gear R1 and the sun gear S3 are rotating at a reduced speed, the transmission member 640 transmits a relatively large torque. On the other hand, at the fifth forward speed, the sixth forward speed, and the first reverse speed, the rotation of the sun gear S3 is input to the ring gear R1 via the transmission member 640 and the clutch C1 is released, so that as shown in FIG. The sun gear S1 rotates on the basis of the rotation of the ring gear R1 at each speed and the fixed carrier CR1.

Since the operations other than the planetary gear PR are the same as those in the sixth reference example described above, description thereof is omitted.

As described above, according to the automatic speed change mechanism 2 ₁₀ according to the reference example, the planetary gear PR, the clutch C1, and one axial side of the transmission member 640 the planetary gear unit PU (in FIG. 32 left side) as the reduced rotation output means The clutch C2 and the clutch C3 are arranged on the other axial side of the planetary gear unit PU (right side in FIG. 32), and the counter gear 50 as an output member is connected to the clutch C2 and the clutch C3 and the planetary gear unit PU. In particular, the planetary gear PR and the planetary gear unit PU can be arranged close to each other, and the axial length of the transmission member 640 for transmitting the reduced speed rotation can be made relatively short. it can. Thereby, compactness of the automatic transmission 1 _10, can enable weight reduction, further, it is possible to reduce the inertia (the inertia force) by weight of the transmission member 640, the automatic transmission 1 ₁₀ Controllability can be improved and occurrence of shift shock can be reduced.

The clutch C2 is because it is connected to the carrier CR2 through the outer peripheral side of the clutch C3, the complicated members for connecting the respective rotary elements can be prevented, an automatic transmission 1 ₁₀ can be made compact.

  Furthermore, the clutch C3 has a structure in which the clutch C2 is disposed on the outer peripheral side thereof and cannot be expanded in diameter on the outer peripheral side. However, by providing the hydraulic servo 565 on the input shaft 20 (for example, on the boss 3c) The pressure receiving area of the hydraulic servo 565, in particular, the oil chamber 565a for the hydraulic servo 565 can be secured large on the inner peripheral side, and the capacity of the clutch C3 can be increased.

Further, the planetary gear PR, the planetary gear unit PU, and so providing the counter gear 50 to the input shaft 20 coaxially, particularly when the automatic transmission 1 ₁₀ is mounted in the FF vehicle, etc. on the other axis (eg reduction planetary gear can be compact compared with) the drive wheel transmission mechanism (for example, the counter shaft portion 4, etc.) in the case of providing, for example, it is possible to prevent interference with the vehicle body member, the vehicle mountability of the automatic transmission 1 ₁₀ Can be improved.

Further, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2001-263438, when the clutch C1 is interposed between the ring gear R1 and the sun gear S3, it is necessary to connect and disconnect the reduced speed rotation, which is relatively large. Although it becomes a thing and the space between the planetary gear PR and the planetary gear unit PU spreads, the connection / disconnection of rotation of the input shaft 20 by the clutch C1 is caused by being interposed between the input shaft 20 and the sun gear S1. Thus, the reduced rotation output from the ring gear R1 of the planetary gear PR is connected / disconnected, so that the clutch C1 can be made compact and the planetary gear PR and the planetary gear unit PU can be arranged at relatively close positions. Thereby it is possible to compact the automatic transmission 1 _10.

Further, since the hydraulic servo 565 is provided on the input shaft 20, leakage is prevented from the case 3 by a pair of seal rings 281 and oil is supplied to the oil passages 20 a and 20 b provided in the input shaft 20. Thus, for example, oil can be supplied to the oil chamber 565a of the hydraulic servo 565 without providing a seal ring between the input shaft 20 and the hydraulic servo 565. Further, the hydraulic servos 562 and 561 can supply oil from the boss portions 3c and 3d extending from the case 3, respectively, without passing through other members, for example, a pair of seal rings 580. , 582 can be provided to supply oil. Therefore, the hydraulic servos 565, 562, and 561 can supply oil only by providing a pair of seal rings 581, 580, and 582, respectively, and can minimize sliding resistance caused by the seal rings. Accordingly, it is possible to improve the efficiency of the automatic transmission 1 _10.

Further, the planetary gear PR is because the double-pinion planetary gear, it is possible to output a reduced rotation to rotation of the input shaft 20, also the gear ratio of the automatic transmission 1 ₁₀ as set better, the planetary gear unit, the reduction planetary gear without increasing the respective rotating elements, because it can also suppress the high rotation, it is possible to make the automatic transmission 1 ₁₀ compactly.

  Further, the planetary gear PR is configured to include a sun gear S1 that is an input rotation element, a carrier CR1 that is a fixed element, and a ring gear R1 that is an output rotation element, so that the rotation of the input shaft 20 is reduced. Can be output.

  The planetary gear unit PU is a Ravigneaux type planetary gear constituted by the sun gear S2, the sun gear S3, the carrier CR2, and the ring gear R2. Therefore, for example, it is possible to enable 6 forward speeds and 1 reverse speed. However, the planetary gear PR and the planetary gear unit PU can be arranged close to each other, and the transmission member 640 that transmits the reduced speed rotation can be made relatively short.

  In addition, since the one-way clutch F3 that is arranged in parallel with the brake B1 and restricts the rotation of the carrier CR2 in one direction is provided, for example, the first forward speed during the positive drive is achieved by the engagement of the clutch C1 and the one-way clutch F3. Therefore, for example, the first forward speed when switching from the non-traveling range to the traveling range can be achieved smoothly.

  Further, since the brake B1 and the one-way clutch F3 are disposed on the outer peripheral side of the planetary gear unit PU, for example, the one-way clutch F3 is disposed adjacent to the clutch C2 (especially for restricting rotation in one direction of the hub member 523). Compared to the case, the portion where the clutches C1 and C2 are disposed can be made compact in the axial direction, so that the counter gear 50 can be brought closer to the torque converter side. Thereby, the gear 51 of the countershaft 52 can be brought closer to the torque converter side, and the countershaft portion 4 can be made compact in the axial direction.

Further, as shown in the speed diagram, the planetary gear PR and the planetary gear unit PU can be arranged close to each other, while being able to achieve the sixth forward speed and the first reverse speed, the transmission for transmitting the reduced speed rotation. The member 640 can be made relatively short. Thereby, compactness of the automatic transmission 1 _10, can enable weight reduction, further, it is possible to reduce the inertia (the inertia force), it is possible to improve the controllability of the automatic transmission 1 ₁₀ And the occurrence of shift shock can be reduced.

Further, the present automatic speed change mechanism 2 ₁₀ is made directly coupled at fifth forward speed, that is, the reduced rotation can be output over four stages up to the fourth forward speed from the first speed, in particular an automatic speed change mechanism 2 ₁₀ When mounted on a vehicle, it is possible to subdivide the shift in the low and medium speed region of the vehicle. As a result, particularly in the low / medium speed region of the vehicle, it becomes possible to use more of the rotational speed region that provides the best efficiency of the drive source such as the engine, and the fuel efficiency can be improved. Furthermore, since the direct connection state is established at the fifth forward speed, only the sixth forward speed can be overdriven. For example, the fifth forward speed and the sixth forward speed are established when the forward fourth speed is established. The final reduction gear ratio can be made smaller than that in which the stage is overdriven. Thereby, for example, the differential ring gear diameter of the differential portion 5 can be reduced, and the distance between the input shaft 20 and the shaft of the differential portion 5 can be shortened. the transmission 1 ₁₀ can be made compact.

Further, as a drive wheel transmission mechanism, a counter gear that has a differential portion 5 that outputs rotation to the drive wheel and a counter shaft portion 4 that engages with the differential portion 5, and an output member meshes with the counter shaft portion 4. since it is, it is possible to mount the automatic transmission 1 ₁₀ for example in the FF vehicle.

< Eighth Reference Example >
Hereinafter, an eighth reference example in which the sixth reference example is partially changed will be described with reference to FIGS. Figure 35 is operation table of the automatic transmission schematic sectional view showing an automatic speed change mechanism of an automatic transmission according to the reference example 8, FIG. 36 according to the reference example 8, FIG. 37 according to a reference example of the eighth It is a speed diagram of an automatic transmission. Note that, in the eighth reference example , the same reference numerals are given to the same parts as in the sixth reference example , except for some changes, and description thereof is omitted.

As shown in FIG. 35, the automatic speed change mechanism 2 ₁₁ of the automatic transmission 1 according to the reference example of the eighth, the automatic transmission mechanism 2 ₉ of the sixth reference example (see FIG. 29), instead of the clutch C1 A brake (third brake) B3 is arranged, and a planetary gear (decelerated rotation output means, decelerating planetary gear) PR carrier (fixed element, first carrier) CR1 is freely fixed by the brake B3.

In the automatic speed change mechanism 2 _11, the brake B3 is of the planetary gear PR, is arranged on the opposite side (the left side in the drawing) of the planetary gear unit PU. The brake B3 includes a hydraulic servo 566, a friction plate 576, and a hub member 731. The hydraulic servo 566 is formed on a piston member 566b for pressing the friction plate 576 and a part of the case 3b. A cylinder portion 566e, an oil chamber 566a formed by sealing between the piston member 566b and the cylinder portion 566e by seal rings 566f and 566g, and the piston member 566b are urged toward the oil chamber 566a. The return spring 566c and a return plate 566d that receives the biasing force of the return spring 566c are configured.

  The hub member 731 of the brake B3 is connected to the side plate 732 of the carrier CR1, and the side plate 732 is rotatably supported by the boss portion 3d. A sun gear (input rotation element, first sun gear) S1 meshed with the pinion P1 of the carrier CR1 is connected to the input shaft 20, and a ring gear (output rotation element, first gear) meshed with the pinion P2 of the carrier CR1. 1 ring gear) R1, a transmission member 740 is connected, and a sun gear S3 is connected via the transmission member 740.

Subsequently, based on the above configuration, FIG. 35 for the operation of the automatic speed change mechanism 2 ₁₁ will be described with reference to FIGS. 36 and 37. As in the sixth reference example , in the velocity diagram shown in FIG. 37, the vertical axis indicates the number of rotations of each rotating element, and the horizontal axis indicates the gear ratio of these rotating elements. ing. Also, in the planetary gear unit PU portion of the velocity diagram, the vertical axis at the lateral end (right side in FIG. 37) is the sun gear S3, and the vertical axis is the ring gear R2 and the carrier in order from the left side to the subsequent figures. It corresponds to CR2 and sun gear S2.

  As shown in FIG. 35, when the brake B3 is locked, the carrier CR1 is fixed to the case 3b. The rotation of the input shaft 20 is input to the sun gear S1, and the ring gear R1 rotates at a reduced speed based on the rotation of the input shaft 20 input to the sun gear S1 when the carrier CR1 is fixed. . That is, the sun gear S3 receives the reduced rotation of the ring gear R1 via the transmission member 740 when the brake B3 is engaged.

  Then, as shown in FIGS. 36 and 37, in the planetary gear PR, the carrier CR1 is fixed by locking the brake B3 at the first forward speed, the second forward speed, the third forward speed, and the fourth forward speed. Then, the reduced rotation is output to the ring gear R3 by the rotation of the sun gear S1 to which the rotation of the input shaft 20 is input, and the reduced rotation is input to the sun gear S3 via the transmission member 740. At this time, since the ring gear R1 and the sun gear S3 are rotating at a reduced speed, the transmission member 740 transmits a relatively large torque. On the other hand, in the fifth forward speed, the sixth forward speed, and the first reverse speed, the rotation of the sun gear S3 is input to the ring gear R1 via the transmission member 740, and the brake B3 is released. The carrier CR1 rotates on the basis of the rotation of the ring gear R1 at the respective speeds and the sun gear S1 of the input shaft 20.

Since the operations other than the planetary gear PR are the same as those in the sixth reference example described above, description thereof is omitted.

As described above, according to the automatic speed change mechanism 2 ₁₁ according to the reference example, the planetary gear PR, the brake B3, and the one axial side of the transmission member 740 the planetary gear unit PU (in FIG. 35 left side) as the reduced rotation output means The clutch C2 and the clutch C3 are arranged on the other side in the axial direction of the planetary gear unit PU (right side in FIG. 35), and the counter gear 50 as an output member is connected to the clutch C2 and the clutch C3 and the planetary gear unit PU. In particular, the planetary gear PR and the planetary gear unit PU can be arranged close to each other, and the axial length of the transmission member 740 for transmitting the reduced rotation can be made relatively short. it can. Thereby, compactness of the automatic transmission 1 _11, can enable weight reduction, further, it is possible to reduce the inertia (the inertia force) by weight of the transmission member 740, the automatic transmission 1 ₁₁ Controllability can be improved and occurrence of shift shock can be reduced.

The clutch C2 is because it is connected to the carrier CR2 through the outer peripheral side of the clutch C3, the complicated members for connecting the respective rotary elements can be prevented, an automatic transmission 1 ₁₁ can be made compact.

  Furthermore, the clutch C3 has a structure in which the clutch C2 is disposed on the outer peripheral side thereof and cannot be expanded in diameter on the outer peripheral side. However, by providing the hydraulic servo 565 on the input shaft 20 (for example, on the boss 3c) The pressure receiving area of the hydraulic servo 565, in particular, the oil chamber 565a for the hydraulic servo 565 can be secured large on the inner peripheral side, and the capacity of the clutch C3 can be increased.

Further, the planetary gear PR, the planetary gear unit PU, and so providing the counter gear 50 to the input shaft 20 coaxially, particularly when the automatic transmission 1 ₁₁ is mounted in the FF vehicle, etc. on the other axis (eg reduction planetary gear can be compact compared with) the drive wheel transmission mechanism (for example, the counter shaft portion 4, etc.) in the case of providing, for example, it is possible to prevent interference with the vehicle body member, the vehicle mountability of the automatic transmission 1 ₁₁ Can be improved.

Further, since the output of the reduced speed rotation is connected / disconnected by the engagement of the brake B3, for example, the brake B3 can be made more compact than the clutch that connects / disconnects the reduced speed rotation, and the planetary gear PR and the planetary gear unit PU Can be placed in close proximity to each other. Whereby compactness of the automatic transmission 1 ₁₁ may allow weight reduction.

Further, since the hydraulic servo 565 is provided on the input shaft 20, leakage is prevented from the case 3 by a pair of seal rings 581 and oil is supplied to the oil passages 20 a and 20 b provided in the input shaft 20. Thus, for example, oil can be supplied to the oil chamber 565a of the hydraulic servo 565 without providing a seal ring between the input shaft 20 and the hydraulic servo 565. Further, each of the hydraulic servos 562 can supply oil from the bosses 3c extending from the case 3 without using other members, for example, a pair of seal rings 580 are provided. With this, oil can be supplied. Accordingly, the hydraulic servos 565 and 562 can supply oil only by providing a pair of seal rings 581 and 580, respectively, and can minimize the sliding resistance caused by the seal rings. it is possible to improve the efficiency of the machine 1 _11.

Further, the planetary gear PR is because the double-pinion planetary gear, it is possible to output a reduced rotation to rotation of the input shaft 20, also the gear ratio of the automatic transmission 1 ₁₁ as was set well, the planetary gear unit, the reduction planetary gear without increasing the respective rotating elements, because it can also suppress the high rotation, it is possible that automatic transmission 1 ₁₁ compactly.

  Further, the planetary gear PR is configured to include a sun gear S1 that is an input rotation element, a carrier CR1 that is a fixed element, and a ring gear R1 that is an output rotation element, so that the rotation of the input shaft 20 is reduced. Can be output.

  The planetary gear unit PU is a Ravigneaux type planetary gear constituted by the sun gear S2, the sun gear S3, the carrier CR2, and the ring gear R2. Therefore, for example, it is possible to enable 6 forward speeds and 1 reverse speed. However, the planetary gear PR and the planetary gear unit PU can be disposed close to each other, and the transmission member 740 that transmits the reduced speed rotation can be made relatively short.

  In addition, since the one-way clutch F3 that is arranged in parallel with the brake B1 and restricts the rotation of the carrier CR2 in one direction is provided, for example, the first forward speed during the positive drive is achieved by the engagement of the clutch C1 and the one-way clutch F3. Therefore, for example, the first forward speed when switching from the non-traveling range to the traveling range can be achieved smoothly.

  Further, since the brake B1 and the one-way clutch F3 are disposed on the outer peripheral side of the planetary gear unit PU, for example, the one-way clutch F3 is disposed adjacent to the clutch C2 (especially for restricting rotation in one direction of the hub member 523). Compared to the case, the portion where the clutches C1 and C2 are disposed can be made compact in the axial direction, so that the counter gear 50 can be brought closer to the torque converter side. Thereby, the gear 51 of the countershaft 52 can be brought closer to the torque converter side, and the countershaft portion 4 can be made compact in the axial direction.

Further, as shown in the speed diagram, the planetary gear PR and the planetary gear unit PU can be arranged close to each other to achieve the sixth forward speed and the first reverse speed, and the transmission that transmits the reduced speed rotation can be achieved. The member 740 can be made relatively short. Thereby, compactness of the automatic transmission 1 _11, can enable weight reduction, further, it is possible to reduce the inertia (the inertia force), it is possible to improve the controllability of the automatic transmission 1 ₁₁ And the occurrence of shift shock can be reduced.

Further, the present automatic speed change mechanism 2 ₁₁ is made directly coupled at fifth forward speed, that is, the reduced rotation can be output over four stages up to the fourth forward speed from the first speed, in particular an automatic speed change mechanism 2 ₁₁ When mounted on a vehicle, it is possible to subdivide the shift in the low and medium speed region of the vehicle. As a result, particularly in the low / medium speed region of the vehicle, it becomes possible to use more of the rotational speed region that provides the best efficiency of the drive source such as the engine, and the fuel efficiency can be improved. Furthermore, since the direct connection state is established at the fifth forward speed, only the sixth forward speed can be overdriven. For example, the fifth forward speed and the sixth forward speed are established when the forward fourth speed is established. The final reduction gear ratio can be made smaller than that in which the stage is overdriven. Thereby, for example, the differential ring gear diameter of the differential portion 5 can be reduced, and the distance between the input shaft 20 and the shaft of the differential portion 5 can be shortened. the transmission 1 ₁₁ can be made compact.

Further, as a drive wheel transmission mechanism, a counter gear that has a differential portion 5 that outputs rotation to the drive wheel and a counter shaft portion 4 that engages with the differential portion 5, and an output member meshes with the counter shaft portion 4. since it is, it is possible to mount the automatic transmission 1 ₁₁ for example in the FF vehicle.

In the first to third embodiments and the first to eighth reference examples according to the present invention, the automatic transmission including the torque converter 12 is described as an example. Not limited to this, any starting device that transmits torque (rotation) at the time of starting may be used. Moreover, although the case where it mounts in the vehicle which is an engine as a drive source was demonstrated, it is not restricted to this, It is possible to mount in a hybrid vehicle, Of course, any drive source may be sufficient. is there. Furthermore, the automatic transmission is suitable for use in FF vehicles, but is not limited thereto, and can be used in vehicles of other drive systems such as FR vehicles and four-wheel drive vehicles.

In the first to third embodiments and the first to eighth reference examples described above , the configuration of the reduced rotation output means is described as an example, but all the embodiments are described. In which a clutch is provided between the input shaft and the input rotation element, a clutch is provided between the speed reduction rotation element and the first rotation element, a fixing element can be fixed by a brake, an input shaft and an input Any one of a clutch provided between the rotating element and a fixing element that can be fixed by a brake may be applied.

Further, for example, in the second embodiment and the third embodiment , the automatic transmission mechanism has been described in which the input side and the output side are interchanged. It is possible to use an automatic transmission mechanism in which the input side and the output side are interchanged.

  As described above, the automatic transmission according to the present invention is useful for mounting on vehicles such as passenger cars, trucks, buses, and the like. It is suitable for use as a vehicle that is required to be reduced.

FIG. 3 is a cross-sectional development view showing an automatic transmission according to a first reference example. Sectional drawing which shows the automatic transmission mechanism of the automatic transmission which concerns on a 1st reference example. The skeleton figure which shows the automatic transmission which concerns on a 1st reference example. The operation | movement table | surface of the automatic transmission which concerns on a 1st reference example. The speed diagram of the automatic transmission which concerns on a 1st reference example. FIG. 6 is a cross-sectional development view showing an automatic transmission according to a second reference example. Sectional drawing which shows the automatic transmission mechanism of the automatic transmission which concerns on a 2nd reference example. The skeleton figure which shows the automatic transmission which concerns on a 2nd reference example. The operation | movement table | surface of the automatic transmission which concerns on a 2nd reference example. The speed diagram of the automatic transmission which concerns on a 2nd reference example. Sectional drawing which shows the automatic transmission mechanism of the automatic transmission which concerns on 1st Embodiment. The skeleton figure which shows the automatic transmission which concerns on 1st Embodiment. The operation | movement table | surface of the automatic transmission which concerns on 1st Embodiment. The speed diagram of the automatic transmission which concerns on 1st Embodiment. Sectional drawing which shows the automatic transmission mechanism of the automatic transmission which concerns on a 3rd reference example . The skeleton figure which shows the automatic transmission which concerns on a 3rd reference example . The operation | movement table | surface of the automatic transmission which concerns on a 3rd reference example . The speed diagram of the automatic transmission which concerns on a 3rd reference example . The schematic cross section which shows the automatic transmission mechanism of the automatic transmission which concerns on 2nd Embodiment . The operation | movement table | surface of the automatic transmission which concerns on 2nd Embodiment . The speed diagram of the automatic transmission which concerns on 2nd Embodiment . The schematic cross section which shows the automatic transmission mechanism of the automatic transmission which concerns on 3rd Embodiment . The schematic cross section which shows the automatic transmission mechanism of the automatic transmission which concerns on a 4th reference example . The operation | movement table | surface of the automatic transmission which concerns on a 4th reference example . The speed diagram of the automatic transmission which concerns on a 4th reference example . The schematic cross section which shows the automatic transmission mechanism of the automatic transmission which concerns on a 5th reference example . The operation | movement table | surface of the automatic transmission which concerns on a 5th reference example . The speed diagram of the automatic transmission which concerns on a 5th reference example . The schematic cross section which shows the automatic transmission mechanism of the automatic transmission which concerns on a 6th reference example . The operation | movement table | surface of the automatic transmission which concerns on a 6th reference example . The speed diagram of the automatic transmission which concerns on a 6th reference example . The schematic cross section which shows the automatic transmission mechanism of the automatic transmission which concerns on a 7th reference example . The operation | movement table | surface of the automatic transmission which concerns on a 7th reference example . The speed diagram of the automatic transmission which concerns on a 7th reference example . The schematic cross section which shows the automatic transmission mechanism of the automatic transmission which concerns on the 8th reference example . The operation | movement table | surface of the automatic transmission which concerns on an 8th reference example . The speed diagram of the automatic transmission which concerns on the 8th reference example .

Claims (22)

An input shaft that rotates based on the output rotation of the drive source;
A planetary gear unit having first, second, third and fourth rotating elements;
Decelerated rotation output means capable of freely outputting decelerated rotation decelerated from rotation of the input shaft to the first rotating element;
A first clutch interposed between the input shaft and the second rotating element;
A second clutch interposed between the input shaft and the third rotating element;
An automatic transmission comprising: an output member that outputs rotation of the fourth rotating element to a drive wheel transmission mechanism;
The reduced rotation output means is disposed on one side in the axial direction of the planetary gear unit,
The first and second clutches are arranged on the other axial side of the planetary gear unit;
The output member is disposed between the first and second clutches and the planetary gear unit;
The reduction rotation output means includes an input rotation element that constantly inputs rotation of the input shaft, a fixed element that constantly fixes rotation, and an output rotation element that is coupled to the first rotation element, A third clutch interposed between the rotating element and the output rotating element,
Engagement of the third clutch enables output of the reduced speed rotation,
The reduction planetary gear is disposed between the hydraulic servo of the third clutch and the axial direction of the planetary gear unit,
The output rotation element of the reduction planetary gear is composed of a first ring gear,
The friction plate of the third clutch is disposed at a position where the inner peripheral side is spline-engaged with the outer peripheral side of the first ring gear of the reduction planetary gear and overlaps the radial outer peripheral side of the reduction planetary gear ,
The transmission path of the reduced rotation connected from the first ring gear to the first rotating element via the friction plate of the third clutch is axially connected to the hydraulic servo of the third clutch. Located on the planetary gear unit side,
The transmission path of the decelerated rotation is engaged with the drum portion of the clutch drum of the third clutch that is spline-engaged with the outer peripheral side of the friction plate of the third clutch, and the tip portion of the drum portion of the clutch drum. And a transmission member coupled to the first rotating element,
The transmission member is disposed between the reduction planetary gear and the planetary gear unit in the axial direction, and is supported rotatably with respect to the input shaft.
A disc-shaped member that is disposed between the reduction planetary gear and the planetary gear unit in the axial direction and supports the first ring gear rotatably with respect to the input shaft;
The bearing disposed on the speed reduction planetary gear side that supports the axial position of the disk-shaped member is disposed on the inner peripheral side of the side plate on the planetary gear unit side in the carrier of the speed reduction planetary gear at a position that overlaps the side plate in the radial direction. Become,
An automatic transmission characterized by that. The first clutch is connected to the second rotating element through the inner peripheral side of the output member,
The second clutch is connected to the third rotating element through the outer peripheral side of the first clutch and the inner peripheral side of the output member.
The automatic transmission according to claim 1 . The first clutch includes a friction plate whose inner peripheral side is spline-engaged with a member connected to the second rotating element, and includes a hydraulic servo and is spline-engaged to the outer peripheral side of the friction plate, and the input A first clutch drum coupled to the shaft; a first piston that presses the friction plate; an inner peripheral side of the first piston and the input shaft; and an outer peripheral side and the first clutch. A hydraulic chamber for a first hydraulic servo formed by sealing the space between the drum in a liquid-tight manner,
The second clutch includes a friction plate whose inner peripheral side is spline-engaged with a member connected to the third rotating element, and includes a hydraulic servo, and is spline-engaged to the outer peripheral side of the friction plate, and the second clutch A second clutch drum disposed on the outer peripheral side of the one clutch drum and coupled to the input shaft; a second piston for pressing the friction plate; and an inner peripheral side and an outer peripheral side of the second piston And a second hydraulic servo hydraulic chamber formed by sealing between the second clutch drum and the second clutch drum in a liquid-tight manner.
The automatic transmission according to claim 1 or 2 . Before Symbol speed reduction planetary gear, formed by providing the planetary gear unit, and said output member to said input shaft coaxially,
The automatic transmission according to any one of claims 1 to 3 . The boss portion to which the fixed element of the speed reduction planetary gear is fixed includes a second boss portion,
The first clutch, the second clutch, and the third clutch have respective hydraulic servos,
The hydraulic servo of the second clutch is disposed on a first boss portion extending from one end of the case, and communicates with an oil passage provided in the first boss portion,
The hydraulic servo of said first clutch is disposed on one end of said input shaft, it communicates with an oil passage provided in the first boss portion through an oil passage provided within the input shaft,
The hydraulic servo of said third clutch is disposed on the second boss portion extending from the other end of the case, consisting communicates with an oil passage provided in the second boss portion,
The automatic transmission according to any one of claims 1 to 4 . The third clutch includes a friction plate whose inner peripheral side is spline-engaged with the first ring gear of the reduction planetary gear , and a third clutch drum that includes a hydraulic servo and is spline-engaged with the outer peripheral side of the friction plate. And a third piston that presses the friction plate, and a third piston formed by sealing between the inner and outer peripheral sides of the third piston and the third clutch drum in a liquid-tight manner. A hydraulic chamber for a hydraulic servo,
The automatic transmission according to any one of claims 1 to 5 . The reduction planetary gear is a double pinion planetary gear.
The automatic transmission according to any one of claims 1 to 6 . The reduction planetary gear includes a first carrier that is the input rotation element, a first sun gear that is the fixed element, and a first ring gear that is the output rotation element.
The automatic transmission according to claim 7 . The reduction planetary gear includes a first sun gear that is the input rotation element, a first carrier that is the fixed element, and a first ring gear that is the output rotation element.
The automatic transmission according to claim 7 . The planetary gear unit is a Ravigneaux type planetary gear configured by a second sun gear, a third sun gear, a second carrier, and a second ring gear.
The first rotation element is the second sun gear that inputs the output rotation of the reduced rotation output means and can be fixed by locking the second brake,
The second rotating element is the third sun gear that inputs rotation of the input shaft by engagement of the first clutch;
The third rotating element has a long pinion that meshes with the second sun gear and a short pinion that meshes with the third sun gear, and can be fixed by locking a third brake, The second carrier for inputting rotation of the input shaft by engagement of the second clutch;
The fourth rotating element is the second ring gear meshing with the long pinion;
The automatic transmission according to claim 1 . A first one-way clutch that is arranged in parallel with the third brake and restricts the rotation of the second carrier in one direction;
The automatic transmission according to claim 10 . The third brake and the first one-way clutch are arranged on the outer peripheral side of the planetary gear unit,
The automatic transmission according to claim 11 . The vertical axis indicates the number of rotations of each of the first, second, third, and fourth rotating elements, and the horizontal axis corresponds to the gear ratios of the first, second, third, and fourth rotating elements. In the velocity diagram shown,
The first rotating element to which the decelerated rotation is input corresponds to the vertical axis of the lateral end, and in order, the third rotating element, the fourth rotating element connected to the output member, the first Corresponding to two rotating elements,
The automatic transmission according to any one of claims 10 to 12 . The first forward speed is achieved by engagement of the first clutch and the third brake.
The second forward speed is achieved by the engagement of the first clutch and the second brake.
The third forward speed is achieved by engaging the first clutch and setting the reduced rotation output from the reduced rotation output means.
The fourth forward speed is achieved by engaging the first clutch and the second clutch.
By setting the second clutch to be engaged and outputting the decelerated rotation from the decelerated rotation output means, the fifth forward speed can be achieved.
6 forward speeds by engagement of the second clutch and the second brake,
Reversing the first speed is achieved by engaging the third brake and enabling the decelerated rotation output from the decelerated rotation output means.
The automatic transmission according to claim 10 . The planetary gear unit includes: a first simple planetary gear having a second sun gear, a second carrier, and a second ring gear; and a second simple planetary gear having a third sun gear, a third carrier, and a third ring gear. Become
The first rotating element is the third ring gear that inputs an output rotation of the speed reduction planetary gear and can be fixed by locking a second brake,
The second rotating element can be fixed by engagement of a third brake, and the third carrier and the second ring gear for inputting rotation of the input shaft by engagement of the first clutch. And
The third rotating element is the second sun gear and the third sun gear that input rotation of the input shaft by engagement of the second clutch,
The fourth rotating element is the second carrier meshing with the second sun gear and the second ring gear;
The automatic transmission according to any one of claims 1 to 8 . A first one-way clutch that is arranged in parallel with the third brake and restricts the rotation of the third carrier and the second ring gear in one direction;
The automatic transmission according to claim 15 . The third brake and the first one-way clutch are arranged on the outer peripheral side of the planetary gear unit,
The automatic transmission according to claim 16 . The inner race of the first one-way clutch and the second ring gear are integrally formed.
The automatic transmission according to claim 17 . A second one-way clutch that is arranged in parallel with the second brake and restricts the rotation of the third ring gear in one direction by locking the fourth brake;
The automatic transmission according to any one of claims 15 to 18 . The vertical axis indicates the number of rotations of each of the first, second, third, and fourth rotating elements, and the horizontal axis corresponds to the gear ratios of the first, second, third, and fourth rotating elements. In the velocity diagram shown,
The first rotating element to which the decelerated rotation is input corresponds to the vertical axis of the lateral end, and in order, the third rotating element, the fourth rotating element connected to the output member, the first Corresponding to two rotating elements,
The automatic transmission according to any one of claims 15 to 19 . The first forward speed is achieved by the engagement of the second clutch and the third brake.
The second forward speed is achieved by the engagement of the second clutch and the second brake.
The third forward speed is achieved by engaging the second clutch and allowing the decelerated rotation output means to output decelerated rotation.
The fourth forward speed is achieved by engaging the first clutch and the second clutch.
By making the first clutch engaged and outputting the reduced speed rotation from the reduced speed rotation output means, the fifth forward speed is set,
6 forward speeds by engagement of the first clutch and the second brake,
Reversing the first speed is achieved by engaging the third brake and enabling the decelerated rotation output from the decelerated rotation output means.
The automatic transmission according to any one of claims 15 to 20 . The drive wheel transmission mechanism has a differential part that outputs rotation to the drive wheel, and a countershaft part that engages with the differential part,
The output member is a counter gear that meshes with the counter shaft portion.
The automatic transmission according to any one of claims 1 to 21 .

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