WO2016024482A1

WO2016024482A1 - Automatic transmission

Info

Publication number: WO2016024482A1
Application number: PCT/JP2015/071746
Authority: WO
Inventors: 宏光竹中; 藤峰　卓也
Original assignee: スズキ株式会社
Priority date: 2014-08-11
Filing date: 2015-07-31
Publication date: 2016-02-18
Also published as: CN105659001A; CN105659001B; JP6357963B2; JP2016038070A

Abstract

In this automatic transmission (2): a sensor (48) is provided to the lateral wall (2a) of a transmission case (2A) opposing a single-speed countergear that is closest to a clutch on the axis line of a countershaft and is installed at the lateral wall (2a) at the same side of the transmission case (2A) as a shift unit (35); the shift unit (35) is disposed opposite to a clutch (7) with the sensor (48) therebetween; a casing (36) is inclined in a manner such that, in the axial direction of an input shaft, one end (36b) in the axial direction at the sensor (48) side of the bottom (36A) of the casing (36) separates upwards from the sensor (48) in relation the other end (36c) in the axial direction of the bottom (36A); and an accumulator (44) is installed at the space between the sensor (48) and the bottom (36A) of the casing (36).

Description

Automatic transmission

The present invention relates to an automatic transmission. Specifically, the present invention relates to an automatic transmission that automatically performs a shift operation in a manual transmission.

In general, as an automatic transmission mounted on a vehicle such as an automobile, automatic transmission such as AT (Automatic Transmission) is possible by automatically performing a gear shifting operation performed by a driver in MT (Manual Transmission) using an actuator. AMT (Automated / Manual / Transmission) is known.

As this type of conventional AMT, for example, the one described in JP 2002-530599 A (hereinafter referred to as Patent Document 1) is known. This AMT is provided with a first actuator for driving the shift and select shaft in the axial direction and a second actuator for rotating the shift and select shaft about the axis on the upper part of the transmission case. A predetermined shift speed is established by moving the select shaft in the axial direction and rotating it around the axis.

Special Table 2002-530599

In such a conventional automatic transmission for a vehicle, the first actuator and the second actuator are provided on the upper part of the transmission case. For this reason, when an automatic transmission is installed in the engine room like an automatic transmission for a front-wheel drive vehicle, the first actuator and the second actuator can be installed in the space above the transmission case.

However, when the automatic transmission is installed below the floor panel as in the case of an automatic transmission for a rear wheel drive vehicle, the first actuator and the second actuator are provided on the upper portion of the transmission case as in the prior art. It was difficult to install. Therefore, the mountability of the automatic transmission is deteriorated.

The present invention has been made paying attention to the above-described problems, and provides an automatic transmission for a vehicle that can improve the mountability of the automatic transmission by reducing the size in the height direction of the automatic transmission. It is intended.

Aspects of the present invention include a transmission case, an input shaft that is rotatably supported by the transmission case and includes a plurality of first transmission gears, an axial end of the input shaft, and an internal combustion engine and an input shaft. A clutch for power intermittently, a hydraulic clutch operating member for disengaging the clutch by operating the clutch lever, and extending parallel to the input shaft and rotatably supported by the transmission case. A counter shaft having a plurality of second speed change gears selectively meshed with the speed change gear, a hydraulic speed change operating member, and a shift-and-operated operation that is movable in the axial direction and rotatable about the axis by the speed change operating member. A transmission mechanism having a select shaft and selectively meshing one of the plurality of first transmission gears and the plurality of second transmission gears, and oil supplied to the transmission operation member and the clutch operation member A hydraulic pressure generating device, a control device for controlling the speed change operation member and the clutch operation member, and a case to which the speed change operation member and the control device are attached. The case, the clutch operation member, and the hydraulic pressure generation device are integrated. A shift unit mounted on the side wall of the transmission case, and facing a clutch-side transmission gear closest to the clutch on the axis of the counter shaft among the plurality of second transmission gears. Is attached to the side wall of the transmission case and has a sensor for detecting the rotational speed of the clutch-side transmission gear, the shift unit and the sensor are attached to the same side wall of the transmission case, and the shift unit is attached to the sensor. Installed on the opposite side of the clutch with the one end in the axial direction on the sensor side of the bottom of the housing in the axial direction of the input shaft being the sensor relative to the other axial end of the bottom Is inclined housing away Luo upward, and a that is placed a part of the hydraulic pressure generating device in the space between the bottom and the sensor housing.

As described above, according to the above aspect, among the plurality of second transmission gears provided on the counter shaft, the side wall of the transmission case faces the clutch-side transmission gear closest to the clutch on the axis of the counter shaft. A sensor is provided.
As a result, the sensor can be brought close to the axial end of the input shaft on the side wall of the transmission case, and a wide space for installing the shift unit can be secured on the side wall of the transmission case.

Also, the shift unit and the sensor are mounted on the same side wall of the transmission case, and the shift unit is installed on the opposite side of the clutch with the sensor interposed therebetween, and the sensor at the bottom of the housing in the axial direction of the input shaft Tilt the housing so that one axial end on the side is away from the sensor relative to the other axial end on the bottom, and install a part of the hydraulic generator in the space between the bottom of the housing and the sensor did.

This makes it possible to expand the space between the bottom of the housing and the sensor, and to install a part of the hydraulic pressure generator in this space. For this reason, a part of the hydraulic pressure generating device and the housing can be installed on the side wall of the transmission case without being parted by the sensor.

For this reason, the space occupied by the hydraulic pressure generating device and the sensor can be prevented from expanding with respect to the side wall of the transmission case, and the shift unit can be downsized. As a result, when the automatic transmission is installed, for example, below the floor panel, the size of the transmission case in the height direction can be shortened, and the mountability of the automatic transmission to the vehicle can be improved.

Also, by attaching the shift unit and the sensor to the same side wall of the transmission case, the total length of the wire harness for connecting the control device and the sensor can be shortened. Thereby, the shift unit can be further downsized. In addition to this, the workability of the wire harness attachment work can be improved by the amount that the total length of the wire harness can be shortened.

FIG. 1 is a view showing an embodiment of an automatic transmission for a vehicle according to the present invention, and is a side view of a transmission attached to a rear portion of the vehicle.
FIG. 2 is a diagram showing an embodiment of the vehicle automatic transmission according to the present invention, and is a plan view of the transmission.
FIG. 3 is a diagram illustrating an embodiment of the automatic transmission for a vehicle according to the present invention, and is a front view of the automatic transmission with a clutch removed.
4 is a cross-sectional view taken along the line IV-IV in FIG.
FIG. 5 is a cross-sectional view taken along line VV in FIG.
FIG. 6 is a cross-sectional view of the shift case and the casing of FIG.
FIG. 7 is a view showing an embodiment of an automatic transmission for a vehicle according to the present invention, and is a perspective view of the automatic transmission.
FIG. 8 is a view showing an embodiment of the automatic transmission for a vehicle according to the present invention, and is a view showing a state in which a front case, a rear case, and a shift unit are disassembled.
FIG. 9 is a diagram showing an embodiment of a vehicle automatic transmission according to the present invention, and is a system configuration diagram of a shift unit.

Hereinafter, an automatic transmission for a vehicle according to an embodiment of the present invention will be described with reference to the drawings.
1 to 9 are diagrams showing an automatic transmission for a vehicle according to an embodiment of the present invention.
First, the configuration will be described.
As shown in FIG. 1, an automatic transmission 2 is mounted on the vehicle 1. The automatic transmission 2 is installed below the floor panel 1 A behind the vehicle 1. That is, the vehicle 1 of the present embodiment is a rear wheel drive vehicle.

As shown in FIGS. 1, 2, and 4, the automatic transmission 2 includes a front case 4, a rear case 5 attached to the front case 4, and an extension case 6 attached to the rear case 5. An engine 3 as an internal combustion engine is connected to the front case 4. The front case 4, the rear case 5, and the extension case 6 constitute the transmission case 2A of the present invention.

As shown in FIG. 4, the front case 4 is provided with a clutch 7. The clutch 7 is opposed to a flywheel 9 provided at an end portion in the axial direction of the crankshaft 8 of the engine 3.

The clutch 7 has an axial end portion 10a of the input shaft 10 attached thereto. The input shaft 10 is rotatably supported by a cylindrical portion 4a formed on the front case 4 on the axial one end portion 10a side, and is rotatably supported on the output shaft 11 on the other axial end portion 10b side. Yes.

The output shaft 11 is rotatably supported by the rear case 5 and the extension case 6 and rotates relative to the input shaft 10. The axial direction one end portion 10a of the input shaft 10 constitutes the axial direction end portion of the input shaft 10 of the present invention.

The clutch 7 includes a clutch disk 12 that is integrally rotatable with the input shaft 10 and movable in the axial direction of the input shaft 10, a pressure plate 13 that presses the clutch disk 12 against the flywheel 9, and a pressure plate 13 And a diaphragm spring 14 for urging the flywheel 9 toward the flywheel 9 side.

A release bearing 15 is provided on the outer peripheral portion of the cylindrical portion 4 a of the front case 4, and the release bearing 15 moves in the axial direction of the input shaft 10 to contact and radially inward of the diaphragm spring 14. Separate.

As shown in FIG. 3, the release bearing 15 is in contact with the base end portion 16a of the clutch lever 16. The clutch lever 16 protrudes from the axis O of the input shaft 10 to the outside of the front case 4 through the opening 4 b of the front case 4, and a distal end portion 16 b in the protruding direction is connected to the clutch actuator 17.

As shown in FIG. 4, the clutch actuator 17 includes a connecting member 21 that is connected to the distal end portion 16 b of the clutch lever 16. When hydraulic pressure is supplied into the clutch actuator 17, the connecting member 21 moves to the left in FIG. When the connecting member 21 moves to the left in FIG. 4, the clutch lever 16 rotates in the clockwise direction, and the release bearing 15 moves to the right in FIG. 4, and the urging of the pressure plate 13 by the diaphragm spring 14 is performed. To release. At this time, the clutch disk 12 is separated from the flywheel 9 and the rotation of the crankshaft 8 is not transmitted to the input shaft 10.

Further, when the connecting member 21 moves to the right in FIG. 4, the clutch lever 16 rotates counterclockwise and the release bearing 15 moves to the left in FIG. At this time, the diaphragm spring 14 urges the pressure plate 13 to press the clutch disk 12 against the flywheel 9, thereby transmitting the rotation of the crankshaft 8 to the input shaft 10.

Further, when the supply of hydraulic pressure to the inside of the clutch actuator 17 is stopped, the connecting member 21 is positioned at a position where the clutch disk 12 is pressed against the flywheel 9.

Thus, the clutch 7 interrupts power between the crankshaft 8 and the input shaft 10 of the engine 3. Here, urging means that the momentum is increased. The clutch actuator 17 constitutes a clutch operating member of the present invention.

The input shaft 10 is provided with a first speed input gear 22A, a reverse input gear 22B, a second speed input gear 22C, a fourth speed input gear 22D and a third speed input gear 22E in order from the clutch 7 side.

The first speed input gear 22A, the reverse input gear 22B, and the second speed input gear 22C are fixed to the input shaft 10. The 4-speed input gear 22D and the 3-speed input gear 22E are rotatably provided on the input shaft 10.

A 5-speed input gear 22F is provided at one end of the output shaft 11. The fifth speed input gear 22 F is constituted by a dog formed on the outer peripheral portion of the output shaft 11.

A counter shaft 23 is rotatably provided on the front case 4 and the rear case 5. The counter shaft 23 extends in parallel with the input shaft 10. The counter shaft 23 is provided with a first speed counter gear 24A, a reverse output gear 24B, a second speed counter gear 24C, a fourth speed counter gear 24D, a third speed counter gear 24E, and a counter drive gear 24F in order from the clutch 7 side. .

The first speed counter gear 24A and the second speed counter gear 24C are rotatably provided on the counter shaft 23. The reverse output gear 24 B is provided so as to be movable in the axial direction of the counter shaft 23. The reverse output gear 24 B and the second speed counter gear 24 C are provided to be movable in the axial direction of the counter shaft 23. The fourth speed counter gear 24D, the third speed counter gear 24E, and the counter drive gear 24F are fixed to the counter shaft 23.

The counter drive gear 24F meshes with the counter driven gear 25. The counter driven gear 25 is attached to the output shaft 11 so as to rotate integrally with the output shaft 11.

The reverse idler shaft 26 is attached to the front case 4 and the rear case 5. As shown in FIG. 5, the reverse idler shaft 26 extends in parallel with the input shaft 10. The reverse idler shaft 26 is provided with a reverse idler gear 27 (see FIG. 5). The reverse idler gear 27 is rotatable about the reverse idler shaft 26 and movable in the axial direction of the reverse idler shaft 26, and meshes with the reverse input gear 22B and the reverse output gear 24B when the vehicle 1 moves backward.

Here, the first speed input gear 22A, the reverse input gear 22B, the second speed input gear 22C, the fourth speed input gear 22D and the third speed input gear 22E constitute a first transmission gear. The first speed counter gear 24A, the reverse output gear 24B, the second speed counter gear 24C, the fourth speed counter gear 24D, and the third speed counter gear 24E constitute a second transmission gear.

As shown in FIG. 4, the front case 4 and the rear case 5 are provided with a third speed / fourth speed shift shaft 28. The 3rd-4th shift shaft 28 is movable in the axial direction of the input shaft 10. Further, a shift yoke 28A and a shift fork 28B are attached to the 3rd-4th shift shaft 28.

The front case 4 and the rear case 5 are provided with a first speed-second speed shift shaft and a fifth speed-reverse shift shaft (not shown) in parallel with the third speed-4th speed shift shaft 28. The first speed-2 speed shift axis and the fifth speed-reverse shift axis are movable in the axial direction of the input shaft 10. A shift yoke and shift forks 30 and 31 (not shown) are attached to the 1st-2nd shift shaft and the 5th-reverse shift shaft.

The shift fork 28B is connected to the sync member 29. The sync member 29 is provided so as to be rotatable integrally with the input shaft 10 and movable in the axial direction of the input shaft 10. The synchronization member 29 moves to one side in the axial direction of the input shaft 10 to mesh the third speed input gear 22E and the third speed counter gear 24E to establish the third forward speed, and the rotation of the input shaft 10 This is transmitted to the output shaft 11 via the counter shaft 23.

The synchro member 29 moves to the other side in the axial direction of the input shaft 10 to mesh the 4-speed input gear 22D and the 4-speed counter gear 24D to establish the forward 4-speed stage, and to rotate the input shaft 10 This is transmitted to the output shaft 11 via the counter shaft 23.

The shift fork 30 of the 1st to 2nd shift shaft is connected to the sync member 32. The sync member 32 is provided so as to be rotatable integrally with the counter shaft 23 and movable in the axial direction of the counter shaft 23.

The synchronization member 32 moves to one side in the axial direction of the counter shaft 23 to mesh the first speed input gear 22A and the first speed counter gear 24A to establish the first forward speed, and the rotation of the input shaft 10 This is transmitted to the output shaft 11 via the counter shaft 23.

In addition, the synchro member 32 moves to the other side in the axial direction of the counter shaft 23 to engage the second speed input gear 22C and the second speed counter gear 24C to establish the second forward speed, thereby rotating the input shaft 10. Is transmitted to the output shaft 11 via the counter shaft 23.

The shift fork 31 of the fifth speed-reverse shift shaft is connected to the sync member 33. The sync member 33 is provided so as to be rotatable integrally with the input shaft 10 and movable in the axial direction of the input shaft 10.

The sync member 33 moves to the 5-speed input gear 22F side in the axial direction of the input shaft 10 to directly connect the output shaft 11 to the input shaft 10 to establish the fifth forward speed, and to rotate the input shaft 10 The signal is transmitted to the output shaft 11 without passing through the counter shaft 23.

A shift fork (not shown) is provided on the 5-speed-reverse shift shaft, and the shift fork is connected to the reverse idler gear 27. This shift fork establishes the reverse gear by engaging the reverse idler gear 27 with the reverse input gear 22B and the reverse output gear 24B by moving the fifth speed-reverse shift shaft to the clutch 7 side, The rotation of 10 is transmitted to the output shaft 11 via the counter shaft 23 that rotates in the opposite direction to that during forward movement.

As shown in FIGS. 1, 2, 4, 6, 7, and 8, a shift case 5 A is provided on the upper portion of the rear case 5, and the shift case 5 A swells upward from the upper portion of the rear case 5. Out.
As shown in FIGS. 4 and 6, the shift case 5 A is provided with a shift and select shaft 34. The shift and select shaft 34 has an axis orthogonal to the axis O of the input shaft 10.

As shown in FIG. 6, the shift and select shaft 34 is provided on the shift case 5A so as to be rotatable and movable in the axial direction. The shift and select shaft 34 is biased toward the shift unit 35 by a coil spring 58.

An operation lever 34 A is provided at one end in the axial direction of the shift and select shaft 34. The operation lever 34 A extends radially outward from the axis of the shift and select shaft 34.
An opening 5a is formed in the shift case 5A. As shown in FIG. 8, the operation lever 34A protrudes outside the shift case 5A through the opening 5a and is positioned on the side wall 2a side of the transmission case 2A. One of the side walls of the front case 4 and the rear case 5 is the side wall 2a of the transmission case 2A.

As shown in FIGS. 1, 6, 7, and 8, a shift unit 35 is provided on the side wall 2a of the transmission case 2A. The shift unit 35 has a housing 36. As shown in FIG. 6, the housing 36 has an opening 36a, and the operation lever 34A is inserted into the opening 36a.

As shown in FIG. 1, a shift actuator 37 is provided in the housing 36. The shift actuator 37 is installed so as to mesh with the operation lever 34A.

As shown in FIG. 9, the housing 36 is provided with a shift operation solenoid 39. The shift operation solenoid 39 adjusts the hydraulic pressure supplied to the shift actuator 37. That is, an oil passage (not shown) for operating the shift actuator 37 is formed in the housing 36.

When the hydraulic pressure is supplied to the oil passage formed inside the shift actuator 37, the shift operation solenoid 39 causes the hydraulic pressure to press the operation lever 34A to rotate the shift and select shaft 34 in the shift direction.

As shown in FIG. 6, the housing 36 is provided with a select actuator 40. The select actuator 40 is provided on the shift and select shaft 34 on the axis.

The casing 36 is provided with a select operation solenoid 41. The select operation solenoid 41 adjusts the magnitude of the hydraulic pressure supplied to the select actuator 40. That is, an oil passage (not shown) for operating the select actuator 40 is formed in the housing 36, and the select operation solenoid 41 adjusts the magnitude of the hydraulic pressure supplied to the select actuator 40 through the oil passage.
As a result, the shift and select shaft 34 moves in the axial direction against the urging force of the coil spring 58, and selects the positions of a plurality of shift yokes including the shift yoke 28A.

As described above, the shift and select shaft 34 can be moved in the axial direction or rotated about the axis by being driven by the shift actuator 37 and the select actuator 40.

Here, the 3rd-4th shift shaft 28, the shift yoke 28A, the

shift forks

28B, 30, 31, the

synchro members

29, 32, 33 and the shift and select shaft 34 constitute a transmission mechanism. Further, the shift actuator 37, the shift operation solenoid 39, the select actuator 40, and the select operation solenoid 41 constitute a speed change operation member.

As shown in FIG. 9, the casing 36 is provided with a clutch operation solenoid 42. The clutch operation solenoid 42 adjusts the hydraulic pressure supplied to the inside of the clutch actuator 17.

As shown in FIGS. 1, 7, and 8, the shift unit 35 includes a housing 36, a reservoir tank 43, an accumulator 44, an oil pump 45, a motor 46, and a base plate 47. The casing 36, the reservoir tank 43, the accumulator 44, the oil pump 45, and the motor 46 are attached to and integrated with a base plate 47.

The reservoir tank 43 stores hydraulic oil. As shown in FIG. 9, the oil pump 45 is driven by a motor 46 to supply the hydraulic oil stored in the reservoir tank 43 to the accumulator 44 through an oil passage (not shown) formed in the base plate 47.

The accumulator 44 stores hydraulic oil pressure and supplies high pressure hydraulic pressure to the housing 36 through an oil passage (not shown) formed in the base plate 47. As shown in FIG. 9, the hydraulic pressure supplied to the housing 36 is supplied to the shift actuator 37, the select actuator 40 and the clutch actuator 17 through the shift operation solenoid 39, the select operation solenoid 41 and the clutch operation solenoid 42.

The reservoir tank 43, accumulator 44, oil pump 45 and motor 46 constitute a hydraulic pressure generator.

As shown in FIGS. 1, 4, and 5, a sensor 48 is attached to the side wall 2a of the transmission case 2A facing the first speed counter gear 24A closest to the clutch 7 on the axis of the counter shaft 23. The sensor 48 detects the rotation speed of the first speed counter gear 24A. The first speed counter gear 24 constitutes a clutch side transmission gear.

As shown in FIG. 1, the casing 36 is provided with a control device 49. The control device 49 includes a microcomputer including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like.

As shown in FIGS. 1, 5, and 7, a motor 46 is connected to the control device 49 via a wire harness 50. The control device 49 drives the motor 46 by outputting a drive signal to the motor 46.

The sensor 48 is connected to the control device 49 from the wire harness 51 through the wire harness 50. The control device 49 detects the rotational speed of the input shaft 10 based on the detection information of the sensor 48.

As shown in FIG. 8, the base plate 47 is formed with an oil passage for supplying hydraulic pressure to the clutch actuator 17. The control device 49 detects, for example, detection information of a shift position sensor (not shown) that detects a shift operation of a shift lever (not shown) provided in the driver's seat, detection information of a vehicle speed sensor (not shown) that detects a vehicle speed, and the depression amount of an accelerator pedal. A shift point is determined based on detection information from an accelerator sensor or the like.

When determining the shift point, the control device 49 operates the clutch operation solenoid 42 to supply hydraulic pressure to the inside of the clutch actuator 17, thereby moving the connecting member 21 to the left in FIG. The urging of the pressure plate 13 by the spring 14 is released, and the clutch 7 is disconnected.

Further, the control device 49 controls the shift operation solenoid 39 and the select operation solenoid 41 to drive the shift actuator 37 and the select actuator 40 when the clutch 7 is disengaged, thereby moving the shift and select shaft 34 in the axial direction and the axial line. Operate around to change gears.

As shown in FIG. 1, the shift unit 35 and the sensor 48 are attached to the side wall 2a on the same side of the transmission case 2A. The shift unit 35 is installed on the opposite side of the clutch 7 with the sensor 48 interposed therebetween.

Specifically, the base plate 47 includes a main body portion 47A that is attached to the side wall 2a of the transmission case 2A and extends in the vertical direction, and a support portion 47B that extends upward from the main body portion 47A.

In the axial direction of the input shaft 10, the housing 36 is arranged such that one axial end 36 b on the sensor 48 side of the bottom 36 A of the housing 36 is separated upward from the sensor 48 with respect to the other axial end 36 c of the bottom 36 A. Inclined. An accumulator 44 that is a part of the hydraulic pressure generator is installed in a space 54 between the bottom 36 A of the housing 36 and the sensor 48.

The reservoir tank 43 is installed above the sensor 48. The reservoir tank 43 is attached to the support portion 47 B of the base plate 47. The oil pump 45 and the motor 46 are installed so as to overlap in the vertical direction between the reservoir tank 43 and the sensor 48. The oil pump 45 and the motor 46 are attached to a support portion 47B of the base plate 47.

One end 36 b in the axial direction of the bottom 36 A of the housing 36 is installed in a space 55 formed below the reservoir tank 43 and on the side of the oil pump 45 and the motor 46. One end 36 b in the axial direction of the housing 36 overlaps the reservoir tank 43 in the vertical direction.

The control device 49 is attached to the housing 36 so as to be positioned on the sensor 48 side and the motor 46 side with respect to the shift actuator 37 and the select actuator 40 not shown in FIG.

In the shift unit 35, the clutch actuator 17 is installed below the housing 36. The space 54 is a triangular space surrounded by the clutch actuator 17, the sensor 48, the oil pump 45, the motor 46, the reservoir tank 43, and the housing 36.

That is, the accumulator 44 is installed in a triangular space 54 surrounded by the clutch actuator 17, the sensor 48, the oil pump 45, the motor 46, the reservoir tank 43 and the housing 36.

As shown in FIGS. 1, 3, 7, and 8, a protector 56 is attached to the bottom of the shift unit 35. The protector 56 includes a guide plate 57 that covers the clutch actuator housing 18 of the clutch actuator 17 from below. Thereby, it is possible to prevent stones scattered from below during the traveling of the vehicle 1 from colliding with the clutch actuator housing 18 and to prevent the clutch actuator housing 18 from being damaged. Therefore, oil can be prevented from leaking from the clutch actuator housing 18.

According to the automatic transmission 2 of the present embodiment having such a configuration, the sensor 48 is provided on the side wall 2a of the transmission case 2A so as to face the first speed counter gear 24A closest to the clutch 7 on the axis of the counter shaft 23. Provided.

Thereby, the sensor 48 can be brought close to the axial direction one end portion 10a of the input shaft 10 of the side wall 2a of the transmission case 2A, and a space for installing the shift unit 35 on the side wall 2a of the transmission case 2A is widened. It can be secured.

Further, according to the automatic transmission 2 of the present embodiment, the shift unit 35 and the sensor 48 are attached to the side wall 2a on the same side of the transmission case 2A, and the shift unit 35 is attached to the clutch 7 with the sensor 48 interposed therebetween. Installed on the opposite side.

In addition to this, in the axial direction of the input shaft 10, the one axial end 36 b on the sensor 48 side of the bottom 36 A of the housing 36 is separated from the sensor 48 upward with respect to the other axial end 36 c of the bottom 36 A. The housing 36 was tilted, and the accumulator 44 was installed in the space 54 between the bottom 36 A of the housing 36 and the sensor 48.

Thereby, the space 54 between the bottom 36A of the housing 36 and the sensor 48 can be enlarged, and the accumulator 44 can be installed in the space 54. Therefore, the accumulator 44 and the casing 36 can be installed on the side wall 2a of the transmission case 2A without the accumulator 44 being obstructed by the sensor 48.

For this reason, the space occupied by the accumulator 44 and the sensor 48 can be prevented from expanding with respect to the side wall 2a of the transmission case 2A, and the shift unit 35 can be downsized. As a result, when the automatic transmission 2 is installed below the floor panel 1A, for example, the height direction dimension of the transmission case 2A can be shortened, and the mountability of the automatic transmission 2 on the vehicle 1 can be improved.

By attaching the shift unit 35 and the sensor 48 to the side wall 2a of the transmission case 2A, the total length of the wire harnesses 51 and 52 for connecting the control device 49 and the sensor 48 can be shortened. Thereby, the shift unit 35 can be further reduced in size. In addition to this, the workability of the attachment work of the wire harnesses 51 and 52 can be improved by the amount that the total length of the wire harnesses 51 and 52 can be shortened.

According to the automatic transmission 2 of the present embodiment, a part of the hydraulic pressure generator installed in the space 54 is configured by the accumulator 44. As a result, the large accumulator 44 can be efficiently attached to the shift unit 35 in the enlarged space between the bottom 36 A of the housing 36 and the sensor 48. For this reason, size reduction of the shift unit 35 can be achieved more effectively.

Since the accumulator 44 having a large shape can be attached to the shift unit 35, the oil can be increased in pressure, and the hydraulic pressure supplied to the shift actuator 37 and the select actuator 40 can be increased. For this reason, the responsiveness of the shift actuator 37 and the select actuator 40 can be improved.

According to the automatic transmission 2 of the present embodiment, the reservoir tank 43 is installed above the sensor 48, and the oil pump 4545 and the motor 46 are installed so as to overlap vertically between the reservoir tank 43 and the sensor 48. Then, the axial end portion 36 b of the housing 36 is installed in a space 55 formed below the reservoir tank 43 and on the side of the oil pump 45 and the motor 46.

Thereby, while the reservoir tank 43, the accumulator 44, the oil pump 45 and the motor 46 are brought close to the control device 49, the shift operation solenoid 39, the select operation solenoid 41, the clutch operation solenoid 42, the shift actuator 37 and the housing 36, The space 54 between the bottom portion 36A of the housing 36 and the sensor 48 can be enlarged.

For this reason, in addition to being able to install the large accumulator 44 in the enlarged space 54 between the bottom 36A of the housing 36 and the sensor 48, the reservoir tank 43, the oil in the narrow space of the side wall 2a of the transmission case 2A. A pump 45, a motor 46, a housing 36, a sensor 48, and an accumulator 44 can be installed. For this reason, the shift unit 35 can be more effectively downsized.

Further, according to the automatic transmission 2 of the present embodiment, the control device 49 is attached to the housing 36 so as to be positioned on the sensor 48 side and the motor 46 side with respect to the shift actuator 37 and the select actuator 40.

Thereby, the control device 49 can be brought close to the sensor 48, and the total length of the wire harnesses 51 and 52 connecting the control device 49 and the sensor 48 can be shortened more effectively. For this reason, the shift unit 35 can be more effectively downsized. In addition to this, the workability of the attachment work of the wire harnesses 51 and 52 can be more effectively improved by the amount that the entire length of the wire harness 51 can be more effectively shortened.

Further, according to the automatic transmission 2 of the present embodiment, in the shift unit 35, the clutch actuator 17 is installed below the housing 36, and the clutch actuator 17, the sensor 48, the oil pump 45, the motor 46, the reservoir tank 43, and An accumulator 44 is installed in a triangular space 54 surrounded by the housing 36.

Thus, the clutch actuator 17, the sensor 48, the oil pump 45, the motor 46, the reservoir tank 43 and the clutch actuator 17, the sensor 48, the oil pump 45, the motor 46, the reservoir tank 43 and the housing 36 are installed in a small space. The accumulator 44 can be installed in a triangular space 54 surrounded by the housing 36. For this reason, the shift unit 35 can be more effectively downsized.

Although embodiments of the present invention have been disclosed, it will be apparent to those skilled in the art that changes may be made without departing from the scope of the present invention. All such modifications and equivalents are intended to be included in the following claims.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Automatic transmission 2A Transmission case 2a Side wall 3 Engine (internal combustion engine)
7 Clutch 10 Input shaft 10a One end in the axial direction (end in the axial direction)
16 Clutch lever 17 Clutch actuator (clutch operating member)
22A speed input gear (first transmission gear)
22B Reverse input gear (first transmission gear)
22C 2-speed input gear (first transmission gear)
22D 4-speed input gear 22E 3-speed input gear 23 Counter shaft 24A 1-speed counter gear (second transmission gear, clutch-side transmission gear)
24B Reverse output gear (second transmission gear)
24C 2-speed counter gear (second gear)
24D 4-speed counter gear (second transmission gear)
24E 3-speed counter gear (second transmission gear)
28 3rd-4th shift shaft (transmission mechanism)

28A Shift yoke

28B, 30, 31 Shift fork (transmission mechanism)
29, 32, 33 ... Synchro member (transmission mechanism)
34 Shift and select shaft (transmission mechanism)
35 Shift unit 36 Housing 36A Bottom portion of housing 36b One axial end portion of the bottom portion of the housing 36c Other axial end portion of the bottom portion of the housing 37 Shift actuator (transmission operation member)
39 Shift operation solenoid (shift operation member)
40 Select actuator (shifting operation member)
41 Select operation solenoid (shift operation member)
42 Clutch operation solenoid (clutch operation member)
43 Reservoir tank (hydraulic pressure generator, shift unit)
44 Accumulator (hydraulic pressure generator, shift unit)
45 Oil pump (hydraulic generator, shift unit)
46 Motor (hydraulic generator, shift unit)
47 Base plate (shift unit)
48 sensors 49

controller

54,55 space

Claims

A transmission case;
An input shaft rotatably supported by the transmission case and having a plurality of first transmission gears;
A clutch that is provided at an axial end of the input shaft, and that interrupts power between the internal combustion engine and the input shaft;
A hydraulic clutch operating member that disengages the clutch by operating a clutch lever;
A counter shaft having a plurality of second transmission gears extending in parallel with the input shaft and rotatably supported by the transmission case, and selectively meshing with the first transmission gears;
A hydraulic shift operating member;
One of the plurality of first transmission gears and the plurality of second transmission gears has a shift-and-select shaft that is movable in the axial direction by the speed change operation member and is rotatable about the axis. A transmission mechanism that selectively meshes with each other,
A hydraulic pressure generator for generating hydraulic pressure supplied to the speed change operation member and the clutch operation member;
A control device for controlling the speed change operation member and the clutch operation member;
A housing to which the speed change operation member and the control device are attached;
A shift unit in which the casing, the clutch operating member, and the hydraulic pressure generator are integrated is an automatic transmission for a vehicle that is attached to a side wall of the transmission case,
Of the plurality of second transmission gears, the clutch side transmission gear is mounted on the side wall of the transmission case so as to face the clutch side transmission gear closest to the clutch on the axis of the counter shaft. Having a sensor to detect,
The shift unit and the sensor are attached to the same side wall of the transmission case, and the shift unit is installed on the opposite side of the clutch with the sensor interposed therebetween,
In the axial direction of the input shaft, the housing is inclined such that one end in the axial direction on the sensor side of the bottom of the housing is away from the sensor with respect to the other end in the axial direction of the bottom, An automatic transmission for a vehicle, wherein a part of the hydraulic pressure generator is installed in a space between a bottom of a housing and the sensor.
2. The automatic transmission for a vehicle according to claim 1, wherein the hydraulic pressure generator has an accumulator, and a part of the hydraulic pressure generator is constituted by the accumulator.
The hydraulic pressure generator includes the accumulator, a reservoir tank that stores hydraulic oil, an oil pump that supplies hydraulic oil in the reservoir tank to the accumulator, and a motor that drives the oil pump.
The reservoir tank is installed above the sensor;
The oil pump and the motor are installed so as to overlap in the vertical direction between the reservoir tank and the sensor,
The axial end portion of the bottom of the casing is installed in a space formed below the reservoir tank and on the side of the oil pump and the motor. The automatic transmission for vehicles described in 1.
The said control apparatus is attached to the said housing | casing so that it may be located in the said sensor side and the said motor side with respect to the said speed change operation member, The Claim 1 characterized by the above-mentioned. Automatic transmission for vehicles.
In the shift unit,
The clutch operating member is installed below the housing;
5. The accumulator according to claim 2, wherein the accumulator is installed in a triangular space surrounded by the clutch operation member, the sensor, the oil pump, the motor, the reservoir tank, and the casing. The automatic transmission for a vehicle according to item 1.