JP2020008073A - Speed change gear of vehicle transmission - Google Patents

Abstract

To provide a speed change gear of a vehicle transmission which enables improvement of workability of assembly work and enables gear change operation to be smoothly performed.SOLUTION: A speed change gear 31 has a cylindrical member 36 which is attached to an outer periphery part of a shift and select shaft 33 so as to integrally move with the shift and select shaft 33. A first finger part 36A and a second finger part 36B and a shift lever 36C which is pressed by a shift piston 46 to rotate the shift and select shaft 33 in a shift direction are integrally provided at the cylindrical member 36.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a transmission for a vehicle transmission.

  2. Description of the Related Art As a transmission of a conventional transmission, a transmission described in Patent Document 1 is known. In the transmission described in Patent Literature 1, a control rod is provided on a lid-like case member attached to a transmission case so as to be rotatable and movable in the axial direction.

  Inside the transmission case, the control rod is provided with a first finger portion and a second finger portion that operate the shift fork, and a unit lower that comes into contact with the detent mechanism. The first finger part, the second finger part, and the unit lower are assembled to the control rod by pins, and the first finger part, the second finger part, and the unit lower are installed side by side in the axial direction of the control rod. ing.

  Outside the transmission case, a counterweight is provided at the upper end of the control rod, and an operating force in a select direction and a shift direction is applied to the counterweight via a cable.

Japanese Patent No. 4941145

  In such a conventional transmission, the first finger portion, the second finger portion, the unit lower, and the counter weight, which are separate components, are attached to the control rod, respectively, so that the workability of assembling the transmission is improved. Getting worse.

 Further, since the first finger portion, the second finger portion, the unit lower and the counter weight are attached to the control rod by pins or the like, when the first finger portion, the second finger portion, the unit lower and the counter weight receive an external force. It rattles against the control rod. For this reason, it is difficult to perform the shift operation smoothly.

  The present invention has been made in view of the above-described circumstances, and provides a transmission device for a vehicle transmission that can improve the workability of an assembling operation and can smoothly perform a shift operation. It is the purpose.

  The present invention provides a plate member attached to the transmission case so as to cover an opening of the transmission case, and is attached to the plate member and is movable in the axial direction with respect to the plate member in response to a select operation. A shift and select shaft that rotates about an axis with respect to the plate member in response to a shift operation, and a cylinder attached to an outer peripheral portion of the shift and select shaft so as to move integrally with the shift and select shaft. A tubular member, one or more finger portions provided on the tubular member for pushing a shift yoke to move a shift fork in a shift direction, and being provided on the tubular member and being pushed by a shift operating member. And a shift lever for rotating the shift and select shaft in a shift direction.

  As described above, according to the present invention, the workability of the assembling work can be improved, and the speed change operation can be smoothly performed.

FIG. 1 is a front view of a vehicle transmission according to one embodiment of the present invention. FIG. 2 is a left side view of the vehicle transmission according to one embodiment of the present invention. FIG. 3 is a left side view of the vehicle transmission according to the embodiment of the present invention with the left case removed. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. FIG. 5 is a bottom view of the transmission as viewed from the direction V in FIG. FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. FIG. 7 is a front view of a shift and select shaft and a tubular member of the vehicle transmission according to one embodiment of the present invention. FIG. 8 is a left side view of the shift and select shaft and the tubular member of the vehicle transmission according to one embodiment of the present invention.

A transmission for a vehicle transmission according to one embodiment of the present invention includes a plate member attached to the transmission case so as to cover an opening of the transmission case, and a plate member attached to the plate member, which responds to a select operation. A shift-and-select shaft that is movable in the axial direction with respect to the plate member and rotates about the axis with respect to the plate member in response to a shift operation; and a shift-and-select shaft that moves integrally with the shift-and-select shaft. A cylindrical member attached to the outer peripheral portion of the first member, one or more finger portions provided on the cylindrical member for pressing the shift yoke to move the shift fork in the shift direction, and a shift operation provided on the cylindrical member. A shift lever for rotating the shift and select shaft in the shift direction by being pressed by the member.
Thereby, the workability of the assembling work can be improved, and the speed change operation can be performed smoothly.

Hereinafter, a transmission for a vehicle transmission according to an embodiment of the present invention will be described with reference to the drawings.
1 to 8 are views showing a vehicle transmission according to an embodiment of the present invention. 1 to 8, the up, down, front, rear, left and right directions are the up, down, front, rear, left, and right directions of the vehicle transmission arranged in the vehicle. The direction is the up-down direction.

First, the configuration will be described.
In FIG. 1, a vehicular transmission 1 (hereinafter, simply referred to as an automatic transmission) mounted on a vehicle such as an automobile is composed of, for example, an AMT (Automated Manual Transmission).

  The automatic transmission 1 includes a transmission case 2. The transmission case 2 has a left case 3 and a right case 4, and an engine 5 is connected to a right end of the right case 4. The light case 4 houses a torque converter 6 composed of a fluid coupling.

  The speed change gear mechanism 7 is housed in the left case 3 as shown in FIG. The transmission gear mechanism 7 includes an input shaft 8 extending in the width direction of the vehicle, a forward idle shaft 9, a reverse idle shaft 10, an intermediate shaft 11, an output shaft 12, and a reverse shaft 13 which are respectively arranged in parallel with the input shaft 8. And Although FIG. 3 shows a state in which the left case 3 is removed, the transmission gear mechanism 7 is located inside the left case 3.

  A differential device 14 is provided in the left case 3. The differential device 14 has a differential case 14A and a final driven gear 14B attached to an outer peripheral portion of the differential case 14A. One end portions of left and right drive shafts (not shown) are connected to the differential case, and left and right drive wheels (not shown) are connected to the other end portions of the drive shafts.

  The engine 5 is configured by a horizontal engine in which a crankshaft is arranged to extend in the width direction of the vehicle, and the vehicle of the present embodiment is an FF (front engine / front drive) vehicle.

  The input shaft 8 is connected to the torque converter 6, and the torque converter 6 transmits the power of the engine to the input shaft 8. The input shaft 8 is provided with a plurality of input gears 21, and the forward idle shaft 9 is provided with a plurality of idle gears 22.

  A plurality of reverse idle gears 23 are provided on the reverse idle shaft 10, and a plurality of intermediate gears 24 are provided on the intermediate shaft 11. The output shaft 12 is provided with a plurality of output gears 25, and the reverse shaft 13 is provided with a reverse gear 26.

  When the vehicle advances, the power transmission path from the input shaft 8 to the output shaft 12 is transmitted from the intermediate shaft 11 after the power of the input shaft 8 is transmitted from the input gear 21 to the intermediate shaft 11 via the idle gear 22. It has a first power transmission path transmitted to the output shaft 12 via the intermediate gear 24 and the output gear 25. An arbitrary gear can be established in the first power transmission path.

  When the vehicle advances, the power transmission path from the input shaft 8 to the output shaft 12 is a second power transmission path in which the power of the input shaft 8 is transmitted to the output shaft 12 via the input gear 21 and the output gear 25. Having. An arbitrary shift speed can be established in the second power transmission path.

  The output shaft 12 is provided with a final drive gear (not shown), and the final drive gear meshes with a final driven gear 14B of the differential device 14. Thus, when the vehicle is moving forward, the power of the engine 5 is transmitted from the output shaft 12 to the left and right drive wheels via the differential device 14.

  When the input shaft 8 moves backward, the power of the input shaft 8 is transmitted from the input gear 21 to the reverse shaft 13 via the reverse idle gear 23 and the reverse gear 26. The output shaft 12 is provided with a final drive gear (not shown), and the final drive gear meshes with a final driven gear 14B of the differential device 14. As a result, when the vehicle is moving backward, the power of the engine 5 is transmitted from the output shaft 12 to the left and right drive wheels via the differential device 14.

  1 and 2, a transmission 31 is provided above the left case 3. 2, an upper part of the left case 3 is provided with an inclined part 3A that is inclined upward from the front side to the rear side of the left case 3, and the transmission 31 is attached to the inclined part 3A.

  The transmission 31 includes a plate member 32, a shift and select shaft 33 (see FIG. 4), a hydraulic pressure generator 34, and a hydraulic circuit 35.

  4, an opening 3a is formed in the inclined portion 3A of the left case 3, and the plate member 32 is attached to the inclined portion 3A so as to cover the opening 3a. The shift and select shaft 33 is provided inside the plate member 32, and extends in the same direction as the inclination direction of the inclined portion 3A. That is, the shift and select shaft 33 is inclined upward from the front side to the rear side of the left case 3.

  2, the plate member 32 is provided with a cylindrical portion 32a extending downward from a lower side wall 32A of the plate member 32 and a cylindrical portion 32b extending upward from an upper side wall 32B.

  In FIG. 4, the lower and upper parts of the shift and select shaft 33 are inserted through the tubular portions 32a and 32b, respectively, and the shift and select shaft 33 moves in the axial direction with respect to the plate member 32 according to the select operation. It is supported by the cylindrical portions 32a and 32b so as to be freely and rotatable around the axis with respect to the plate member 32 in response to a speed change operation.

  In FIG. 1, the hydraulic pressure generating device 34 includes a reservoir tank 41, an accumulator 42, an oil pump 43, and a motor 44. The reservoir tank 41, the accumulator 42, the oil pump 43, and the motor 44 are integrally mounted on the plate member 32. Have been.

  The reservoir tank 41 stores oil for operating the transmission 31. The oil pump 43 is driven by a motor 44 to pressurize the oil stored in the reservoir tank 41 and supply the oil to the accumulator 42 through an oil passage (not shown) formed integrally with the plate member 32.

  The accumulator 42 accumulates oil pressure, passes high-pressure oil through a hydraulic passage (not shown), a select hydraulic chamber 35a (see FIG. 4) formed in the plate member 32, a first shift hydraulic chamber 35b, and a second shift hydraulic pressure. It is supplied to the chamber 35c (see FIG. 6).

  The hydraulic circuit 35 has a not-shown select solenoid, a first shift solenoid, and a second shift solenoid. The select solenoid has a switch function of supplying or stopping supply of oil to the select hydraulic chamber 35a.

  The first shift solenoid has a switch function of supplying or stopping supply of oil to the first shift hydraulic chamber 35b, and a function of adjusting the magnitude of the hydraulic pressure supplied to the first shift hydraulic chamber 35b.

  The second shift solenoid has a switch function of supplying or stopping supply of oil to the second shift hydraulic chamber 35c, and a function of adjusting the magnitude of hydraulic pressure supplied to the second shift hydraulic chamber 35c.

  7 and 8, a cylindrical member 36 is attached to an outer peripheral portion of the shift and select shaft 33 by a pin member (not shown), and the cylindrical member 36 moves integrally with the shift and select shaft 33.

  The upper and lower parts of the shift and select shaft 33 protrude upward and downward from the upper and lower ends of the cylindrical member 36, and the cylindrical member 36 is an outer periphery of an intermediate part excluding the upper and lower parts of the shift and select shaft 33. Mounted on the part.

  As shown in FIG. 8, a first finger portion 36A, a second finger portion 36B, a shift lever 36C, a shift guide 36D, a detent cam 36E, and a magnet 36F are integrally provided on the tubular member 36.

  The first finger portion 36A, the second finger portion 36B, and the shift lever 36C are provided on the same side surface of the tubular member 36, that is, on the inner side surface of the left case 3 (see FIG. 4). Are installed side by side in the axial direction. The first finger portion 36A and the second finger portion 36B of the present embodiment constitute the finger portion of the present invention.

  The detent cam 36E is installed on the opposite side of the shift lever 36C with respect to the shift and select shaft 33, and at the same position as the shift lever 36C in the axial direction of the shift and select shaft 33.

  The magnet 36F and the shift guide 36D are provided on the opposite side of the shift and select shaft 33 from the first finger portion 36A and the second finger portion 36B.

  As shown in FIG. 4, a select piston 45 is provided in the hydraulic circuit 35, and the select piston 45 is slidably provided in the select hydraulic chamber 35a. A concave spring receiver 36a is formed at the upper end of the cylindrical member 36, and a coil spring 47 is interposed between the spring receiver 36a and the side wall 32B.

  One end of the select piston 45 is in contact with the lower end of the shift and select shaft 33, and when the select solenoid supplies oil of the accumulator 42 to the select hydraulic chamber 35a, hydraulic pressure acts on the other end of the select piston 45. Thus, the select piston 45 moves the shift and select shaft 33 upward against the urging force of the coil spring 47.

  When the select solenoid stops supplying oil from the accumulator 42 to the select hydraulic chamber 35a, the shift and select shaft 33 is urged by the coil spring 47 and moves downward. Thus, the shift and select shaft 33 moves in the axial direction which is the select direction.

  The hydraulic circuit 35 is provided with a shift piston 46. In FIG. 6, the shift lever 36C is fitted on the shift piston 46. The shift piston 46 is slidably installed in the hydraulic circuit 35, and has one end inserted into the first shift hydraulic chamber 35b and the other end inserted into the second shift hydraulic chamber 35c.

  When oil is supplied from the accumulator 42 to the first shift hydraulic chamber 35b by the first shift solenoid, the shift piston 46 moves to the second shift hydraulic chamber 35c side (right side). Thereby, the shift lever 36C is pressed by the shift piston 46, and the shift and select shaft 33 rotates to one side.

  When the oil supplied from the accumulator 42 to the first shift hydraulic chamber 35b is stopped by the first shift solenoid and the oil is supplied to the second shift hydraulic chamber 35c by the second shift solenoid, the shift piston 46 is moved. It moves to the first shift hydraulic chamber 35b side (left side).

  Accordingly, the shift lever 36C is pressed by the shift piston 46, and the shift and select shaft 33 rotates in the other direction. Thus, the shift and select shaft 33 is rotated around the axis by the shift piston 46. The select piston 45 of the present embodiment constitutes a select operation member of the present invention, and the shift piston 46 constitutes a shift operation member of the present invention.

  In FIG. 4, the first finger portion 36A is selectively fitted to a not-shown bifurcated fitting portion formed on each of the first shift yoke 51A and the second shift yoke 51B. The finger portion 36B is selectively fitted to a bifurcated fitting portion (not shown) formed on each of the third shift yoke 51C and the fourth shift yoke 51D.

  In FIG. 3, the first shift yoke 51A is connected to a first shifter shaft 52A extending parallel to the input shaft 8, and a first shift fork 53A is connected to the first shifter shaft 52A. .

  The first shift fork 53A is fitted to a sleeve (not shown) provided on the intermediate shaft 11. The sleeve provided on the intermediate shaft 11 selects one of the pair of intermediate gears 24 and connects to the intermediate shaft 11.

  The second shift yoke 51B is connected to a second shifter shaft 52B extending parallel to the input shaft 8. The second shifter shaft 52B is connected to a second shifter shaft 52D extending parallel to the input shaft 8 via a connecting portion 52C, and a second shift fork 53B is connected to the second shifter shaft 52D. ing.

  The second shift fork 53B is fitted to a sleeve (not shown) provided on the intermediate shaft 11. The sleeve provided on the intermediate shaft 11 selects one of a plurality of intermediate gears 24 other than the pair of gears and connects to the intermediate shaft 11.

  The third shift yoke 51C is connected to a third shifter shaft 52E extending parallel to the input shaft 8, and a third shift fork 53C is connected to the third shifter shaft 52E. The third shift fork 53C is fitted to a sleeve (not shown) provided on the input shaft 8. The sleeve provided on the input shaft 8 selects one of the pair of input gears 21 and connects to the input shaft 8.

  The fourth shift yoke 51D is connected to a fourth shifter shaft 52F extending parallel to the input shaft 8. The fourth shifter shaft 52F is connected to a fourth shifter shaft 52H extending in parallel with the input shaft 8 via a connecting portion 52G, and a fourth shift fork 53D is connected to the fourth shifter shaft 52H. ing.

  The fourth shift fork 53D is fitted to a sleeve (not shown) provided on the reverse shaft 13. The sleeve provided on the reverse shaft 13 connects the reverse gear 26 to the reverse shaft 13.

  4 and 5, the transmission 31 is provided with an interlock plate 37. The interlock plate 37 prevents the first finger portion 36A from fitting into both the first shift yoke 51A and the second shift yoke 51B at the same time, and the second finger portion 36B prevents the third shift yoke This prevents simultaneous engagement with both 51C and the fourth shift yoke 51D.

  4 and 6, a boss 32C is provided on the plate member 32, and a detent pin 48 is provided on the boss 32C. The detent pin 48 faces the detent cam 36E in a direction perpendicular to the axial direction of the shift and select shaft 33.

  The detent pin 48 is slidably received in the cylindrical holding portion 48A fixed to the boss portion 32C, the coil spring 48B held in the cylindrical holding portion 48A, and the boss portion 32C. And a moving body 48C pressed by 36E.

  The detent cam 36E and the detent pin 48 constitute a detent mechanism 38. When the shift and select shaft 33 moves in the axial direction and the rotation direction, the moving body 48C moves along the detent cam 36E. To roll.

  The detent mechanism 38 applies an operating force to the shift and select shaft 33 by applying a pressing force of a coil spring 48B for pressing the moving body 48C to the detent cam 36E when the detent cam 36E moves in the axial direction and the rotation direction. Give.

  Specifically, as shown in FIG. 6, the detent cam 36E has a cam surface 36r and a groove 36m formed along the axial direction of the shift and select shaft 33 at the top of the detent cam 36E (FIG. 7). reference). In the detent mechanism 38, when the shift and select shaft 33 rotates in the shift direction, an operating force is applied by moving the moving body 48C to the cam surface 36r and the groove 36m.

  In FIG. 4, the plate member 32 is provided with a boss 32D, and the boss 32D is provided with a guide pin 49. The guide pin 49 faces the shift guide 36D in a direction orthogonal to the axial direction of the shift and select shaft 33.

  The shift guide 36D is formed with a guide groove 36d having a shape following the shift pattern (see FIG. 7), and the tip portion 49a of the guide pin 49 is inserted into the guide groove 36d. The guide groove 36d moves along the guide pin 49 as the shift and select shaft 33 moves in the select direction and rotates in the shift direction.

  After the shift is completed, the distal end portion 49a of the guide pin 49 comes into contact with the wall surface of the guide groove 36d corresponding to the shift speed. This restricts the amount of movement of the shift and select shaft 33 in the select direction and the shift direction, and prevents the shift and select shaft 33 from rattling in the select direction and the shift direction.

  A position sensor 50 is provided on the outer periphery of the plate member 32, and the position sensor 50 faces the magnet 36F in the axial direction of the shift and select shaft 33.

  Specifically, the position sensor 50 faces the magnet 36F in a state where the shift and select shaft 33 is located at the neutral position. The position sensor 50 detects that the shift and select shaft 33 is at the neutral position, and transmits a detection signal to a control circuit (not shown). The magnet 36F of the present embodiment constitutes the magnetic body of the present invention.

  As described above, the transmission 31 of the present embodiment has the tubular member 36 attached to the outer periphery of the shift and select shaft 33 so as to move integrally with the shift and select shaft 33.

  A first finger portion 36A and a second finger portion 36B for pressing the shift yokes 51A, 51B, 51C, 51D on the cylindrical member 36 to move the shift forks 53A, 53B, 53C, 53D in the shift direction, A shift lever 36C for rotating the shift and select shaft 33 in the shift direction by being pressed by the piston 46 is provided integrally.

  Thereby, the rigidity of the first finger portion 36A, the second finger portion 36B, and the shift lever 36C is increased, so that the first finger portion 36A and the shift force of the shift yokes 51A, 51B, 51C, 51D are reduced. The strength of the second finger portion 36B can be increased, and the strength of the shift lever 36C against the load of the shift piston 46 can be increased.

  Therefore, the first finger portion 36A, the second finger portion 36B, and the shift lever 36C can be prevented from rattling as compared with the conventional separate finger portion and shift lever, and the speed change operation can be performed smoothly.

  In addition, the first finger portion 36A, the second finger portion 36BB, and the shift lever 36C are provided integrally with the tubular member 36, thereby bringing the first finger portion 36A and the second finger portion 36B closer to the shift lever 36C. The rigidity of the first finger portion 36A, the second finger portion 36B, and the shift lever 36C can be further increased.

  Therefore, the loads input to the shift and select shaft 33 from the first finger portion 36A, the second finger portion 36B, and the shift lever 36C can be made close to each other, and the shift and select shaft 33 is operated when the shift and select shaft 33 is operated. 33 can be prevented from bending around the cylindrical portions 32a and 32b.

  As a result, it is possible to prevent the sliding resistance of the shift-and-select shaft 33 from increasing in the cylindrical portions 32a and 32b during the gear shifting operation, and to perform the gear shifting operation more smoothly.

  Further, since the first finger portion 36A, the second finger portion 36B, and the shift lever 36C are integrally provided on the tubular member 36, the tubular member 36 can be assembled to the shift and select shaft 33 by one assembly operation. Can be assembled. Therefore, the tubular member 36 can be easily assembled to the shift and select shaft 33 in a short time, and the workability of the assembling work of the transmission 31 can be improved.

  Also, when a separate finger or shift lever is mounted on the shift and select shaft as in the conventional case, if an error occurs in mounting the separate finger or shift lever, the error is accumulated and the finger is shifted. The assembly accuracy of the parts and the shift lever is greatly reduced.

  On the other hand, since the first finger portion 36A, the second finger portion 36B, and the shift lever 36C are provided integrally with the tubular member 36 of the present embodiment, the first finger portion 36A, the second finger portion 36A, and the second Of the finger portion 36B and the shift lever 36C can be prevented from occurring, and the assembling accuracy can be improved. Therefore, the speed change operation by the transmission 31 can be performed more smoothly.

  Further, according to the transmission 31 of the present embodiment, the first finger portion 36A, the second finger portion 36B, and the shift lever 36C are arranged on the same side surface of the cylindrical member 36 in the axial direction of the shift and select shaft 33. They are installed side by side.

  This allows the plate member 32 to move outward (obliquely forward in FIG. 4) as compared with the case where the first finger portion 36A and the second finger portion 36B are on the opposite side of the shift and select shaft 33 from the shift lever 36C. It can be prevented from protruding to the upper side), and the size of the plate member 32 can be reduced. As a result, the size of the transmission 31 can be reduced.

  Further, according to the transmission 31 of the present embodiment, the detent mechanism 38 for applying an operation force when the shift and select shaft 33 rotates in the shift direction is provided. The detent mechanism 38 has a detent pin 48 provided on the plate member 32 and a detent cam 36E provided on the tubular member 36 and in contact with a moving body 48C of the detent pin 48.

  Thereby, in addition to the first finger portion 36A, the second finger portion 36B, and the shift lever 36C, the detent cam 36E can be provided integrally with the tubular member 36, and the detent cam 36E is separately provided, that is, as a single unit. It is not necessary to manufacture it. For this reason, the number of parts of the transmission 31 can be reduced, and the workability of assembling the transmission 31 can be more effectively prevented.

  Further, since the rigidity of the detent cam 36E can be improved, it is possible to prevent the detent cam 36E from rattling against the detent load applied from the moving body 48C urged by the coil spring 48B. Further, if the positions of the first finger portion 36A, the second finger portion 36B and the shift lever 36C are determined, the position of the detent cam 36E is also determined, so that the positional accuracy of the detent cam 36E can be improved.

  Further, according to the transmission 31 of the present embodiment, the detent cam 36E is the same as the shift lever 36C on the opposite side of the shift lever 36C with respect to the shift and select shaft 33 and in the axial direction of the shift and select shaft 33. It is installed in a position.

  Thereby, the axial length of the cylindrical member 36 can be reduced as compared with the case where the detent cam 36E and the shift lever 36C are formed on the same side surface of the cylindrical member 36. For this reason, the axial length of the shift and select shaft 33 can be reduced, and the plate member 32 in which the shift and select shaft 33 is housed can be reduced in size. As a result, the transmission 31 can be further downsized, and the automatic transmission 1 can be further downsized.

  Further, since the shift lever 36C is installed inside the plate member 32, the transmission 31 can be further downsized as compared with the case where the shift lever protrudes outward from the plate member 32.

  Further, a reaction force applied from the shift piston 46 to the shift lever 36C is applied to the detent cam 36E. When the detent cam 36E is separated from the shift lever 36C, a load in the opposite direction is applied to the upper and lower ends of the shift and select shaft 33, and a bending load is applied to the shift and select shaft 33.

  For this reason, the sliding resistance of the shift-and-select shaft 33 may increase in the tubular portions 32a and 32b during the gear shifting operation.

  On the other hand, the detent cam 36E of the present embodiment is installed on the opposite side of the shift lever 36C with respect to the shift and select shaft 33 and at the same position in the axial direction of the shift and select shaft 33.

  Accordingly, it is possible to prevent a bending load from being applied to the shift and select shaft 33, and to prevent the sliding resistance of the shift and select shaft 33 from increasing in the tubular portions 32a and 32b during the gear shifting operation. As a result, the speed change operation can be performed smoothly.

  Further, according to the transmission 31 of the present embodiment, the shift guide 36D having the guide groove 36d formed along the shift pattern is provided in the cylindrical member 36, and the shift guide 36D is Are disposed on the opposite side of the first finger portion 36A and the second finger portion 36B.

  Further, the plate member 32 is provided with a guide pin 49 that has a tip portion 49a inserted into the guide groove 36d and regulates the amount of movement of the shift and select shaft 33 in the axial direction and the rotation direction.

  As a result, the shift guide 36D can be prevented from rattling as compared with the case where a separate shift guide is attached to the shift and select shaft 33, and the shift operation can be performed smoothly. In addition to this, the number of parts of the transmission 31 can be reduced, and workability of assembling the transmission 31 can be more effectively prevented.

  When a load is applied from the shift piston 46 to the shift lever 36C during the shift operation, one of the first finger portion 36A and the second finger portion 36B receives a reaction force from the shift yokes 51A, 51B, 51C, 51D. Is added.

  Further, since the first finger portion 36A and the second finger portion 36B are separated from the shift lever 36C, loads in opposite directions are applied to the upper and lower ends of the shift and select shaft 33, and a bending load is applied to the shift and select shaft 33. Is added.

On the other hand, in the transmission 31 of the present embodiment, the shift guide 36D provided on the opposite side of the shift and select shaft 33 from the first finger portion 36A and the second finger portion 36B serves as a reinforcing member. In addition, the shift and select shaft 33 can be reinforced to resist bending loads.
As a result, it is possible to prevent the sliding resistance of the shift-and-select shaft 33 from increasing in the cylindrical portions 32a and 32b during the gear shifting operation, and to perform the gear shifting operation more smoothly.

  According to the transmission 31 of the present embodiment, the cylindrical member 36 is provided with the magnet 36F, and the magnet 36F is provided with the first finger portion 36A and the second finger portion with the shift and select shaft 33 interposed therebetween. It is installed on the side opposite to 36B.

  In addition, the plate member 32 has a position sensor 50 that faces the magnet 36F and detects the magnet 36F.

  Thereby, the axial length of the cylindrical member 36 can be reduced as compared with the case where the first finger portion 36A and the second finger portion 36B are formed on the same side surface of the magnet 36F. Therefore, the axial length of the shift and select shaft 33 can be further reduced, and the size of the plate member 32 in which the shift and select shaft 33 is accommodated can be further reduced. As a result, the transmission 31 can be further downsized, and the automatic transmission 1 can be further downsized.

  In addition, the rigidity of the cylindrical member 36 can be further increased by the magnet 36F having high rigidity, and the rigidity of the shift and select shaft 33 can be further increased. Therefore, it is possible to easily prevent the shift and select shaft 33 from being deformed.

  Further, the transmission 31 of the present embodiment has a hydraulic pressure generator 34 attached to the plate member 32. The plate member 32 has a hydraulic circuit 35 to which oil is supplied from a hydraulic pressure generator 34, a shift piston 46, and a select piston 45 for moving the shift and select shaft 33 in the axial direction.

  The shift piston 46 is provided so as to be fitted to the first finger portion 36A and the second finger portion 36B, and moves the shift and select shaft 33 in the shift direction by hydraulic pressure supplied from the hydraulic circuit 35.

  The select piston 45 is provided so as to be positioned in the axial direction of the shift and select shaft 33, and moves the shift and select shaft 33 in the select direction by hydraulic pressure supplied from the hydraulic circuit 35.

  Thus, the transmission 31 can be configured by integrating the plate member 32, the hydraulic pressure generator 34, the hydraulic circuit 35, the select piston 45, and the shift piston 46, and the size of the automatic transmission 1 can be reduced.

  Further, the transmission 31 in which the plate member 32, the hydraulic pressure generator 34, and the hydraulic circuit 35 having the select piston 45 and the shift piston 46 are integrated can be attached to the left case 3, so that the transmission 31 is assembled. The attaching work can be easily performed in a short time, and the workability of the assembling work of the transmission 31 can be improved.

  Further, the transmission 31 of the present embodiment includes the two first finger portions 36A and the second finger portion 36B, but the number of finger portions may be one or three or more.

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

  DESCRIPTION OF SYMBOLS 1 ... Automatic transmission, 2 ... Transmission case, 3a ... Opening, 31 ... Transmission, 32 ... Plate member, 33 ... Shift and select shaft, 34 ... Hydraulic pressure generator, 35 ... Hydraulic circuit, 36 ... Cylindrical member, 36A ... First finger part (finger part), 36B ... Second finger part (finger part), 36C ... .Shift lever, 36D ... Shift guide, 36d ... Guide groove, 36E ... Detent cam, 36F ... Magnet (magnetic material), 38 ... Detent mechanism, 41 ... Reservoir tank (Hydraulic pressure) Generating device), 42 ... accumulator (hydraulic pressure generating device), 43 ... oil pump (hydraulic pressure generating device), 44 ... motor (hydraulic pressure generating device), 45 ... select piston (select operating member), 46 ... shift piston (shift operation member), 48 ... detent pin, 49 ... guide pin, 49a ... End (distal end portion of the guide pin), 50 ... position sensor, 51A, 51B, 51C, 51D ... shift yoke, 53A, 53B, 53C, 53D ... shift forks

Claims (7)

A plate member attached to the transmission case so as to cover an opening of the transmission case;
A shift and select shaft attached to the plate member and movable in the axial direction with respect to the plate member in response to a select operation, and rotating around the axis with respect to the plate member in response to a shift operation;
A tubular member attached to the outer periphery of the shift and select shaft so as to move integrally with the shift and select shaft;
One or more finger portions provided on the tubular member for pressing a shift yoke to move a shift fork in a shift direction;
And a shift lever provided on the cylindrical member and configured to rotate the shift and select shaft in a shift direction by being pressed by a shift operation member.   2. The vehicular transmission according to claim 1, wherein the finger portion and the shift lever are installed side by side in the axial direction of the shift and select shaft on the same side surface of the tubular member. 3. Transmission. The transmission has a detent mechanism that applies an operating force when the shift and select shaft rotates in a shift direction,
3. The vehicle according to claim 1, wherein the detent mechanism includes a detent pin provided on the plate member, and a detent cam provided on the tubular member and in contact with the detent pin. 4. Transmission of transmission.   The detent cam is provided on the opposite side of the shift lever with respect to the shift and select shaft, and at the same position as the shift lever in the axial direction of the shift and select shaft. 4. The transmission of a vehicle transmission according to claim 3. A shift guide having a guide groove shaped along the shift pattern is provided on the cylindrical member,
The shift guide is installed on the opposite side of the finger portion with respect to the shift and select shaft,
The said plate member is provided with the front-end | tip part inserted in the said guide groove, The guide pin which regulates the movement amount of the said shift-and-select shaft in the axial direction and rotation direction is provided. The transmission of a vehicle transmission according to any one of claims 1 to 4. A magnetic body is provided on the cylindrical member,
The magnetic body is installed on the opposite side of the finger portion with respect to the shift and select shaft,
The transmission of a vehicle transmission according to any one of claims 1 to 5, wherein the plate member has a position sensor that faces the magnetic body and detects the magnetic body. The transmission has a hydraulic pressure generator attached to the plate member,
The plate member has a hydraulic circuit to which oil is supplied from the hydraulic pressure generating device, the shift operation member, and a select operation member that moves the shift and select shaft in an axial direction,
The shift operation member is provided so as to be fitted to the finger portion, and moves the shift and select shaft in a shift direction by hydraulic pressure supplied from the hydraulic circuit,
The said select operation member is provided so that it may be located in the axial direction of the said shift-and-select shaft, and moves the said shift-and-select shaft in a select direction by the hydraulic pressure supplied from the said hydraulic circuit. The transmission of a vehicle transmission according to any one of claims 1 to 6.

Images