JP6245109B2 - Automatic transmission - Google Patents

Description

  The present invention relates to an automatic transmission, and more particularly to an automatic transmission that automatically performs a shift operation in a manual transmission.

  In general, in automatic transmissions mounted on vehicles such as automobiles, automatic transmission such as AT (Automatic Transmission) is possible by automatically performing shift operation and clutch operation with an actuator in MT (Manual Transmission). AMT (Automated Manual Transmission) is known.

  As this type of conventional AMT, for example, one described in Patent Document 1 is known. In this AMT, a shift actuator for reciprocating and rotating a shift and select shaft is provided at the upper part of the transmission case, and a predetermined shift stage is established by the shift actuator.

JP 2005-291461 A

  In such a conventional automatic transmission, a shift actuator is provided at the upper part of the transmission case. For this reason, when the automatic transmission is installed horizontally in the engine room of a front-wheel drive vehicle, there is sufficient space for placing the gear shifting actuator in the upper part of the transmission case in the engine room. It can be installed in a vehicle without.

  However, when the automatic transmission is installed vertically below the floor panel of a rear-wheel drive vehicle, the space between the upper part of the automatic transmission and the floor panel is narrow, so that there is no gear for the upper part of the transmission case. If the actuator is provided, the mountability of the automatic transmission on the vehicle is deteriorated.

  The present invention has been made paying attention to the above-described problems, and the members constituting the shift unit can be efficiently arranged at a low position on the outer side surface of the transmission case, so that the vertical transmission of the automatic transmission relative to the vehicle can be performed. An object of the present invention is to provide an automatic transmission capable of improving the mountability in a placement arrangement.

  According to a first aspect of the present invention, there is provided a transmission case having a first case and a second case coupled to each other, and rotatably supporting an input shaft inside the first case and the second case, A clutch that is provided at an axial end of the input shaft in the first case, interrupts power transmission between the internal combustion engine and the input shaft, and extends in the outer circumferential direction from the radial center of the first case; A clutch lever that disengages the clutch by swinging with an operating force acting on its outer end, and is disposed on the upper part of the second case in a posture in which its central axis faces in a direction intersecting the input shaft, A shift-and-select shaft that shifts by reciprocating in the axial direction of the central axis and turning around the central axis, and a shift unit fixed to the outer wall of the transmission case, the shift unit comprising: Hydraulic Connected to the outer end of the clutch lever, and to a clutch actuator that swings the clutch lever by the hydraulic pressure generated by the hydraulic pressure generator, and to one end of the shift and select shaft. In the automatic transmission, comprising: a shift actuator that reciprocally moves and rotates the shift and select shaft by the hydraulic pressure generated by the hydraulic pressure generator; and a control device that controls the clutch actuator and the shift actuator. An opening is formed at a position obliquely below the input shaft on the outer periphery of the case, the outer end of the clutch lever is exposed to the outside of the first case from the opening, and the clutch actuator is moved to the clutch. The axial direction of the transmission case is flat with the outer end of the lever. The shift actuator and the control device are arranged above the clutch actuator, and the hydraulic pressure generator is arranged above the outer end portion of the clutch lever. Is made up of.

  As described above, according to the first aspect, the outer end portion of the clutch lever and the clutch actuator can be disposed at a lower position obliquely below the input shaft in the direction along the outer peripheral surface of the transmission case. A wide space can be secured above the outer end and the clutch actuator.

  The clutch actuator is arranged so as to extend from the outer end of the clutch lever to the shift and select shaft side in parallel with the axial direction of the transmission case, and the speed change actuator and the control device are arranged above the clutch actuator. The speed change actuator and the control device can be efficiently arranged at a low position in a wide space secured above.

  Further, since the hydraulic pressure generating device is arranged above the outer end portion of the clutch lever, the members constituting the hydraulic pressure generating device can be efficiently arranged at a low position in a wide space secured above the outer end portion of the clutch lever.

  Therefore, the members constituting the shift unit can be efficiently arranged at a low position on the outer side surface of the transmission case, and the mountability in the vertical arrangement of the automatic transmission with respect to the vehicle can be improved.

FIG. 1 is a diagram showing an embodiment of an automatic transmission according to the present invention, and is a side view of an automatic transmission mounted on a vehicle. FIG. 2 is a diagram showing an embodiment of the automatic transmission according to the present invention, and is a plan view of the automatic transmission. FIG. 3 is a diagram showing an embodiment of the automatic transmission according to the present invention, and is a front view of the automatic transmission with the clutch removed. 4 is a view showing an embodiment of the automatic transmission according to the present invention, and is a cross-sectional view taken along the IV-IV direction of FIG. FIG. 5 is a diagram showing an embodiment of the automatic transmission according to the present invention, and is a perspective view of the automatic transmission.

  Embodiments of an automatic transmission according to the present invention will be described below with reference to the drawings. 1 to 5 are diagrams showing an automatic transmission according to an embodiment of the present invention.

  First, the configuration will be described. In FIG. 1, an automatic transmission 2 is mounted on a vehicle 1, and the automatic transmission 2 is installed vertically below a floor panel 1 </ b> A of the vehicle 1 while being fixed to an engine 3. That is, the vehicle 1 of the present embodiment is a rear wheel drive vehicle.

  Here, in this embodiment, the front / rear, left / right, and up / down directions are indicated by arrows in the drawing so as to coincide with the front / rear direction, the left / right direction, and the up / down direction seen from the driver seated in the driver's seat of the vehicle 1. ing.

  1, 2, and 4, the automatic transmission 2 includes a transmission case 2 </ b> A. The transmission case 2 </ b> A includes a front case 4, a rear case 5 attached to the front case 4, and a rear case 5. The extension case 6 is attached. An engine 3 as an internal combustion engine is connected to the front case 4. Here, the front case 4 constitutes a first case in the present invention, and the rear case 5 constitutes a second case in the present invention.

  In FIG. 4, the front case 4 is provided with a clutch 7, and the clutch 7 faces a flywheel 9 provided at an end portion in the axial direction of the crankshaft 8 of the engine 3.

  One end 10 a of the input shaft 10 in the axial direction is attached to the clutch 7. The input shaft 10 is rotatably supported by a cylindrical portion 4a formed on the front case 4 on one end side in the axial direction, and is rotatably supported on the output shaft 11 on the other end portion 10b side in the axial direction. . 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 clutch 7 includes a clutch disk 12 provided so as to be rotatable integrally 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 that flies. A diaphragm spring 14 that biases the wheel 9 is provided.

  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.

  The release bearing 15 is in contact with the base end portion 16a of the clutch lever 16 (see FIG. 3). The clutch lever 16 protrudes outward from the front case 4 from the axis of the input shaft 10 through the opening 4 b of the front case 4. In other words, the clutch lever 16 extends in the outer peripheral direction from the radial center of the front case 4.

  An outer end portion 16 b protruding from the front case 4 of the clutch lever 16 is connected to the clutch actuator 17. The clutch 7 is disconnected when the clutch lever 16 is swung by an operating force acting on the outer end portion 16b. As shown in FIGS. 3 and 4, the swing fulcrum 16c of the clutch lever 16 is disposed between the base end portion 16a and the outer end portion 16b.

  The clutch actuator 17 has a clutch actuator housing 18 and a piston (not shown).

  The clutch actuator 17 includes a connecting member 21 that connects the piston and the outer end portion 16 b of the clutch lever 16. The connecting member 21 is composed of a cable.

  The clutch actuator housing 18 is attached to a shift unit (see FIGS. 1, 2, and 5), which will be described later. When hydraulic oil pressure is supplied, the connecting member 21 is moved to the left in FIG. Moving. 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.

  In the clutch actuator 17, 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. When the hydraulic oil pressure is removed, the piston 19 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 of the engine 3 and the input shaft 10. Here, urging means that the momentum is increased. Here, the clutch actuator 17 constitutes the clutch operating member of the present invention.

  In FIG. 4, a counter shaft 23 is rotatably provided on the front case 4 and the rear case 5, and the counter shaft 23 extends in parallel with the input shaft 10.

  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 22 </ b> A, the reverse input gear 22 </ b> B, and the second speed input gear 22 </ b> C 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 clutch gear 22 </ b> F is provided at one end of the output shaft 11, and the 5-speed clutch gear 22 </ b> F includes a dog formed on the outer peripheral portion of the output shaft 11.

  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 24 </ b> A and the second speed counter gear 24 </ b> C are rotatably arranged on the counter shaft 23, and the reverse output gear 24 </ b> B is provided so as to be movable in the axial direction of the counter shaft 23. The 4-speed counter gear 24D, the 3-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, and the counter driven gear 25 is attached to the output shaft 11 so as to rotate integrally with the output shaft 11.

  A reverse idler shaft is fixed to the front case 4 and the rear case 5, and a reverse idler gear is provided on the reverse idler shaft. The reverse idler gear is movable in the axial direction of the reverse idler shaft, 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 an input side transmission gear 61. 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 an output side transmission gear 62. In the automatic transmission 2, the input-side transmission gear 61 and the output-side transmission gear 62 selectively transmit power by a transmission mechanism 60 described later, so that one of the first to fourth gears is formed.

  In FIG. 4, the front case 4 and the rear case 5 are provided with a third speed / fourth speed shift shaft 28, and the third speed / fourth speed 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.

  Further, the front case 4 and the rear case 5 are provided with a first speed-2 speed shift shaft and a fifth speed-reverse shift shaft (not shown) in parallel with the third speed-4th speed shift shaft 28, respectively. The 5-speed-reverse shift shaft is movable in the axial direction of the input shaft 10.

  Further, 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, respectively.

  The shift fork 28 </ b> B is connected to a sync member 29, and 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 synchronizing member 29 moves to one side in the axial direction of the input shaft 10 to fix the third speed input gear 22E to the input shaft 10 to establish the third forward speed, and the rotation of the input shaft 10 To the output shaft 11.

  Further, the synchro member 29 moves to the other side in the axial direction of the input shaft 10, thereby fixing the 4-speed input gear 22 </ b> D to the input shaft 10 to establish the forward 4th speed stage. This is transmitted to the output shaft 11 via the shaft 23.

  The shift fork 30 of the 1st to 2nd shift shaft is connected to a sync member 32, and 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. Yes.

  The synchronizing member 32 moves to one side in the axial direction of the counter shaft 23, thereby fixing the first speed counter gear 24 </ b> A to the counter shaft 23 to establish the first forward speed, and the rotation of the input shaft 10 causes the counter shaft 23 to rotate. To the output shaft 11.

  Further, the synchro member 32 moves to the other side in the axial direction of the counter shaft 23 to fix the second speed counter gear 24C to the counter shaft 23 to establish the second forward speed, and the rotation of the input shaft 10 This is transmitted to the output shaft 11 via the shaft 23.

  The shift fork 31 of the fifth speed-reverse shift shaft is connected to a sync member 33, and 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 synchronizing member 33 moves to the fifth speed clutch gear 22F side in the axial direction of the input shaft 10, thereby directly connecting the output shaft 11 to the input shaft 10 to establish the fifth forward speed, and rotating 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 a reverse idler gear. This shift fork establishes the reverse gear by engaging the reverse idler gear with the reverse input gear 22B and the reverse output gear 24B by moving the 5-speed-reverse shift shaft to the clutch 7 side, and the input shaft 10 Is transmitted to the output shaft 11 via the counter shaft 23 that rotates in the opposite direction to that during forward movement.

  1, 4, and 5, a shift case 5 </ b> A is provided on the upper portion of the rear case 5, and the shift case 5 </ b> A bulges upward from the upper portion of the rear case 5.

  The shift case 5 </ b> A is provided with a shift and select shaft 34, and the shift and select shaft 34 has an axis perpendicular to the axis of the input shaft 10.

  The shift and select shaft 34 is provided on the shift case 5 </ b> A so as to be rotatable and movable in the axial direction, and is biased toward the shift unit 35 described later by a coil spring 58.

  Here, the third- and fourth-speed shift shaft 28, the shift yoke 28 </ b> A, the shift forks 28 </ b> B, 30 and 31, the synchro members 29, 32 and 33, and the shift and select shaft 34 constitute a transmission mechanism 60.

  The speed change mechanism 60 moves the third and fourth speed shift shaft 28, the shift yoke 28A, the shift forks 28B, 30, 31, and the synchro members 29, 32, 33 by reciprocating and rotating the shift and select shaft 34. Then, the gear is shifted to any one of the first to fourth gears.

  1 and 5, an operation lever 34 </ b> A is provided at one end of the shift and select shaft 34 in the axial direction, and the operation lever 34 </ b> A extends radially outward from the axis of the shift and select shaft 34. As shown in FIG. 5, one end of the shift and select shaft 34 in the axial direction and the operation lever 34A protrude outside the shift case 5A and are located on the side wall 2a side of the transmission case 2A. Here, 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.

  1, 2, and 5, a shift unit 35 is provided on the side wall 2 a of the transmission case 2 </ b> A, and the shift unit 35 has a housing 36. The operation lever 34A is inserted into an opening (not shown) in which the housing 36 is formed.

  In FIG. 1, a speed change actuator 64 is provided in the housing 36, and this speed change actuator 64 has a shift actuator 37 and a select actuator 40.

  The shift actuator 37 has a recess for inserting the operation lever 34A. The housing 36 is provided with a shift operation solenoid (not shown). The shift operation solenoid adjusts the hydraulic pressure of the hydraulic oil supplied to the shift actuator 37, thereby pressing the operation lever 34A by the shift actuator 37 to shift the operation oil. The and select shaft 34 is rotated in the shift direction.

  The select actuator 40 is provided on the axis of the shift and select shaft 34. The casing 36 is provided with a select operation solenoid (not shown), and this select operation solenoid adjusts the hydraulic pressure of the hydraulic oil supplied to the select actuator 40. 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.

  Thus, the shift and select shaft 34 can be moved in the axial direction by being driven by the select actuator 40, and can be rotated around the axis line by being driven by the shift actuator 37.

  The casing 36 is provided with a clutch operation solenoid (not shown), and this clutch operation solenoid adjusts the hydraulic pressure of the hydraulic oil supplied to the clutch actuator 17.

  1 and 5, the shift unit 35 includes a housing 36, a reserve tank 43, an accumulator 44, an oil pump 45, a motor 46 and a base plate 47. The housing 36, the reserve tank 43, the accumulator 44, the oil pump 45, and the motor 46 are attached to and integrated with a base plate 47.

  The reserve tank 43 stores hydraulic oil. The oil pump 45 is driven by the motor 46 to increase the pressure of the operating oil supplied from the reserve tank 43 and supply the increased operating oil to the accumulator 44 through an oil passage (not shown) formed in the base plate 47. .

  The accumulator 44 accumulates the pressure of the hydraulic oil and supplies high-pressure hydraulic oil to the housing 36 through an oil passage (not shown) formed in the base plate 47. The hydraulic oil 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, the select operation solenoid, and the clutch operation solenoid. Here, the reserve tank 43, the oil pump 45, and the motor 46 constitute a hydraulic pressure generator 63 that generates hydraulic pressure.

  1 and 4, a rotation 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 rotation sensor 48 is The number of rotations of the first speed counter gear 24A is detected.

  In FIG. 1, the bottom of the housing 36 constitutes an outer box of a control device 49. The control device 49 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. It consists of a microcomputer.

  A motor 46 is connected to the control device 49 via the wire harness 50, and the control device 49 outputs a drive signal to the motor 46 to drive the motor 46.

  A rotation sensor 48 is connected to the control device 49 via the wire harness 51, and the control device 49 detects the number of rotations of the input shaft 10 based on detection information of the rotation sensor 48.

  An oil passage for supplying hydraulic oil to the clutch actuator 17 is formed in the base plate 47. 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 operating solenoid to supply hydraulic oil to the clutch actuator 17, thereby moving the connecting member 21 to the left in FIG. The clutch 7 is disengaged by releasing the bias of the pressure plate 13.

  Further, when the clutch 7 is disengaged, the control device 49 controls the shift operation solenoid and the select operation solenoid to drive the shift actuator 37 and the select actuator 40, whereby the shift and select shaft 34 is moved in the axial direction and around the axis. Operate to change speed.

  In FIG. 1, the shift unit 35 and the rotation sensor 48 are attached to the same side wall 2 a of the transmission case 2 </ b> A, and the shift unit 35 is installed on the opposite side of the clutch 7 with the rotation sensor 48 interposed therebetween. .

  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 from the main body portion 47A to the space above the clutch lever 16.

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

  The reserve tank 43 is installed above the rotation sensor 48, and the reserve tank 43 is attached to the support portion 47 </ b> 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 reserve tank 43 and the rotation sensor 48, and the oil pump 45 and the motor 46 are attached to a support portion 47 </ b> B of the base plate 47.

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

  The outer box of the control device 49 constitutes the bottom of the casing 36 and is positioned on the rotation sensor 48 side and the motor 46 side with respect to the shift actuator 37 and the select actuator 40 not shown in FIG. Installed on.

  In the shift unit 35, the clutch actuator 17 is installed below the housing 36, and the space 55 is defined by the clutch actuator 17, the rotation sensor 48, the oil pump 45, the motor 46, the reserve tank 43, and the housing 36. It becomes a triangular space surrounded.

  That is, the accumulator 44 is installed in a triangular space 55 surrounded by the clutch actuator 17, the rotation sensor 48, the oil pump 45, the motor 46, the reserve tank 43, and the housing 36.

  1 and 5, a protector 56 is attached to the bottom of the shift unit 35. The protector 56 prevents the clutch actuator housing 18 and the like from being damaged by collision of stones scattered from below while the vehicle 1 is traveling.

  According to the automatic transmission 2 of the present embodiment having such a configuration, the opening 4b is formed at a position obliquely below the input shaft 10 in the outer peripheral portion of the front case 4, and the outer end portion 16b of the clutch lever 16 is formed. It is exposed to the outside of the front case 4 from the opening 4b.

  In addition, the clutch actuator 17 is disposed so as to extend from the outer end portion 16b of the clutch lever 16 to the shift and select shaft 34 side in parallel with the input shaft 10 that is the axial direction of the transmission case 2A. The control device 49 is disposed above the clutch actuator 17, and the hydraulic pressure generating device 63 is disposed above the outer end portion 16 b of the clutch lever 16.

  As a result, the outer end portion 16b of the clutch lever 16 and the clutch actuator 17 can be disposed at a lower position obliquely below the input shaft 10 in the direction along the outer peripheral surface of the transmission case 2A. A large space can be secured above the clutch actuator 17.

  The clutch actuator 17 is arranged so as to extend from the outer end portion 16b of the clutch lever 16 to the shift and select shaft 34 side in parallel with the axial direction of the transmission case 2A, and the transmission actuator 64 and the control device 49 are connected to the clutch actuator 17. By disposing above, the speed change actuator 64 and the control device 49 can be efficiently disposed at a low position in a wide space secured above the clutch actuator 17.

  Further, since the hydraulic pressure generating device 63 is disposed above the outer end portion of the clutch lever 16, the members constituting the hydraulic pressure generating device 63 are efficiently installed at a low position in a wide space secured above the outer end portion 16b of the clutch lever 16. Can be arranged.

  Therefore, the members constituting the shift unit 35 can be efficiently arranged at a low position on the outer side surface of the transmission case 2A, and the mountability of the automatic transmission 2 in the vertical arrangement with respect to the vehicle 1 can be improved.

  Further, according to the automatic transmission 2 of the present embodiment, the hydraulic pressure generating device 63 disposed above the outer end portion 16b of the clutch lever 16 includes the reserve tank 43 that stores hydraulic oil, the motor 46, and the motor 46. And the reserve tank 43, the motor 46, and the oil pump 45 are arranged close to each other above the outer end portion 16b of the clutch lever 16.

  As a result, the reserve tank 43, the motor 46, and the oil pump 45 included in the hydraulic pressure generator 63 are disposed close to each other above the outer end portion 16b of the clutch lever 16, so that the reserve tank 43, the motor 46, and the oil pump 45 are arranged. Can be efficiently arranged at a low position in the space above the outer end portion 16 b of the clutch lever 16.

  Further, according to the automatic transmission 2 of the present embodiment, the shift unit 35 includes the base plate 47, and the base plate 47 extends in the vertical direction from the main body portion 47A to the space above the clutch lever 16 from the main body portion 47A. And a support portion 47B. The main body 47A is fixed to the outer surface of the rear case 5, and the reserve tank 43, the motor 46, and the oil pump 45 are attached to the support 47B.

  Thus, by attaching the reserve tank 43, the motor 46, and the oil pump 45 to the support portion 47B of the base plate 47, these can be integrally supported in the space above the outer end portion 16b of the clutch lever 16. The reserve tank 43, the motor 46, and the oil pump 45 can be efficiently arranged at a low position in the space above the outer end portion 16b of the clutch lever 16.

  While embodiments of the 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 invention. All such modifications and equivalents are intended to be included in the following claims.

2 ... automatic transmission, 2A ... transmission case, 4 ... front case (first case), 4b ... opening, 5 ... rear case (second case), 7 ... Clutch, 10 ... input shaft, 16 ... clutch lever, 16b ... outer end, 17 ... clutch actuator, 34 ... shift and select shaft, 35 ... shift unit, 37 .. Shift actuator (transmission actuator), 40 ... Select actuator (transmission actuator), 43 ... Reserve tank (hydraulic pressure generator), 45 ... Oil pump (hydraulic pressure generator), 46 ... Motor (hydraulic pressure) Generator), 47 ... base plate, 47A ... main body, 47B ... support, 49 ... control device, 63 ... hydraulic generator, 64 ... shift actuator

Claims (3)

A transmission case having a first case and a second case connected to each other, and rotatably supporting an input shaft in the first case and the second case;
A clutch that is provided at an axial end of the input shaft in the first case and interrupts power transmission between the internal combustion engine and the input shaft;
A clutch lever that extends in the outer peripheral direction from the radial center of the first case and that disengages the clutch by swinging with an operating force acting on its outer end;
A shift-and-shift unit arranged at the upper part of the second case in a posture in which the central axis is oriented in a direction crossing the input shaft, and shifts by reciprocating in the axial direction of the central axis and rotating around the central axis. Select axis,
A shift unit fixed to the outer wall of the transmission case,
The shift unit is
A hydraulic pressure generator for generating hydraulic pressure;
A clutch actuator connected to the outer end portion of the clutch lever and configured to swing the clutch lever by the hydraulic pressure generated by the hydraulic pressure generator;
A shift actuator connected to one end of the shift and select shaft, and reciprocating and rotating the shift and select shaft by the hydraulic pressure generated by the hydraulic pressure generator;
In the automatic transmission having the clutch actuator and the control device for controlling the transmission actuator,
An opening is formed at a position obliquely below the input shaft in the outer periphery of the first case,
Exposing the outer end of the clutch lever from the opening to the outside of the first case;
The clutch actuator is disposed so as to extend from the outer end portion of the clutch lever to the shift and select shaft side in parallel with the axial direction of the transmission case,
The shift actuator and the control device are disposed above the clutch actuator,
An automatic transmission characterized in that the hydraulic pressure generator is disposed above the outer end of the clutch lever. The hydraulic pressure generator disposed above the outer end of the clutch lever includes a reserve tank that stores hydraulic oil, a motor, and an oil pump that generates hydraulic pressure when driven by the motor. ,
2. The automatic transmission according to claim 1, wherein the reserve tank, the motor, and the oil pump are arranged close to each other above an outer end portion of the clutch lever. The shift unit includes a base plate having a main body portion extending in the vertical direction and a support portion extending from the main body portion to a space above the clutch lever,
The main body is fixed to the outer surface of the second case,
The automatic transmission according to claim 2, wherein the reserve tank, the motor, and the oil pump are attached to the support portion.

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