JP7070171B2 - Transmission of vehicle transmission - Google Patents

Description

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

As a transmission of a conventional transmission, the one described in Patent Document 1 is known. In the transmission described in Patent Document 1, a control rod is provided on a lid-shaped case member attached to the transmission case so as to be rotatable and axially movable.

Inside the transmission case, the control rod is provided with a first finger portion and a second finger portion for operating the shift fork, and a unit lower in contact with the detent mechanism. The first finger portion, the second finger portion and the unit lower are attached to the control rod by a pin, and the first finger portion, the second finger portion and the unit lower are installed side by side in the axial direction of the control rod. ing.

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

Japanese Patent No. 4914145

In such a conventional transmission, the first finger portion, the second finger portion, the unit lower, and the counterweight, which are separate parts, are attached to the control rod, so that the workability of the transmission assembly work is improved. Getting worse.

Further, since the first finger portion, the second finger portion, the unit lower and the counterweight are attached to the control rod by a pin or the like, when the first finger portion, the second finger portion, the unit lower and the counterweight receive an external force. It rattles against the control rod. Therefore, it becomes difficult to smoothly perform the shift operation.

The present invention has been made by paying attention to the above circumstances, and provides a transmission for a vehicle transmission capable of improving the workability of assembly work and smoothly performing a speed change operation. It is the purpose.

The present invention is a plate member attached to the transmission case so as to cover the opening of the transmission case, and the plate member attached to the plate member so as to be movable in the axial direction with respect to the plate member according to a select operation. In addition, a shift-and-select shaft that rotates around the axis with respect to the plate member in response to a shift operation, and a cylinder attached to the outer peripheral portion of the shift-and-select shaft so as to move integrally with the shift-and-select shaft. Shape member and
One or more finger portions provided on the cylindrical member to press the shift yoke to move the shift fork in the shift direction, and the shift and A shift lever that rotates the select shaft in the shift direction and a detent mechanism that applies an operating force when the shift and select shaft rotates in the shift direction are provided, and the detent mechanism includes a detent pin provided on the plate member. It has a detent cam provided on the cylindrical member and in contact with the detent pin, and the detent cam is on the opposite side of the shift and select shaft from the shift lever and on the shift and select shaft. It is characterized in that it is installed at the same position as the shift lever in the axial direction .

As described above, according to the above-mentioned invention, the workability of the assembling work can be improved and the shifting operation can be smoothly performed.

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

The transmission of the vehicle transmission according to the embodiment of the present invention is attached to a plate member attached to the transmission case so as to cover the opening of the transmission case and to the plate member according to a select operation. A shift-and-select axis that is movable in the axial direction with respect to the plate member and that rotates around the axis with respect to the plate member in response to a shift operation, and a shift-and-select axis that moves integrally with the shift-and-select axis. A cylindrical member attached to the outer peripheral portion of the cylinder, one or more finger portions provided on the tubular member to press the shift yoke to move the shift fork in the shift direction, and a tubular member provided with a shift operation. It is equipped with a shift lever that rotates the shift and select shaft in the shift direction when pressed against the member.
As a result, the workability of the assembling work can be improved and the shifting operation can be smoothly performed.

Hereinafter, the transmission of the vehicle transmission according to the 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. In FIGS. 1 to 8, the up / down / front / rear / left / right directions are the up / down / front / rear / left / right directions of the vehicle transmission arranged in the vehicle, the direction orthogonal to the front / rear direction is the left / right direction, and the height of the vehicle transmission. The direction is up and down.

First, the configuration will be described.
In FIG. 1, a vehicle transmission (hereinafter, simply referred to as an automatic transmission) 1 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 the right end portion of the right case 4. A torque converter 6 made of a fluid coupling is housed in the light case 4.

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

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

The engine 5 is composed of a transverse engine in which a crank shaft is arranged so as to extend in the width direction of the vehicle, and the vehicle of this 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.

The reverse idle shaft 10 is provided with a plurality of reverse idle gears 23, and the intermediate shaft 11 is provided with a plurality of intermediate gears 24. 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 is moving forward, 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. Any shift stage can be established in the first power transmission path.

When the vehicle is moving forward, 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. Has. Any shift stage 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 the final driven gear 14B of the differential device 14. As a result, 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 is moving 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 the final driven gear 14B of the differential device 14. As a result, 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 vehicle is moving backward.

In FIGS. 1 and 2, a transmission 31 is provided above the left case 3. In FIG. 2, an inclined portion 3A that inclines upward from the front side to the rear side of the left case 3 is provided on the upper portion of the left case 3, and the transmission 31 is attached to the inclined portion 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.

In FIG. 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 inclined 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.

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

In FIG. 4, the lower portion and the upper portion of the shift-and-select shaft 33 are inserted into the cylindrical portions 32a and 32b, respectively, and the shift-and-select shaft 33 moves in the axial direction with respect to the plate member 32 in response to the select operation. It is supported by the cylindrical portions 32a and 32b so as to rotate freely and around the axis with respect to the plate member 32 according to the shifting operation.

In FIG. 1, the hydraulic pressure generator 34 includes a reservoir tank 41, an accumulator 42, an oil pump 43, and a motor 44, and the reservoir tank 41, the accumulator 42, the oil pump 43, and the motor 44 are integrally attached to the plate member 32. Has been done.

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

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

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

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

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

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

The upper part and the lower part of the shift and select shaft 33 project upward and downward from the upper end and the lower end of the tubular member 36, and the tubular member 36 is the outer periphery of the intermediate portion excluding the upper part and the lower part of the shift and select shaft 33. It is attached to the part.

As shown in FIG. 8, the tubular member 36 is integrally provided with 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.

The first finger portion 36A, the second finger portion 36B, and the shift lever 36C have a shift and select shaft 33 on the same side surface of the tubular member 36, that is, on the inner side surface (see FIG. 4) of the left case 3. They are installed side by side in the axial direction of. 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 side opposite to the shift lever 36C with the shift and select shaft 33 interposed therebetween, 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 installed on the opposite sides of the shift and select shaft 33 from the first finger portion 36A and the second finger portion 36B.

As shown in FIG. 4, the hydraulic circuit 35 is provided with a select piston 45, 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 tubular 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 the oil of the accumulator 42 to the select hydraulic chamber 35a, hydraulic pressure acts on the other end of the select piston 45. As a result, 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 the supply of 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. In this way, the shift-and-select axis 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 to the shift piston 46. The shift piston 46 is slidably installed in the hydraulic circuit 35, and one end thereof is inserted into the first shift hydraulic chamber 35b and the other end thereof is 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). As a result, the shift lever 36C is pressed by the shift piston 46, and the shift and select shaft 33 rotates in one direction.

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 started. The first shift hydraulic chamber moves to the 35b side (left side).

As a result, the shift lever 36C is pressed by the shift piston 46, and the shift and select shaft 33 rotates in the other direction. In this way, 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 the select operation member of the present invention, and the shift piston 46 constitutes the shift operation member of the present invention.

In FIG. 4, the first finger portion 36A is selectively fitted to a bifurcated fitting portion (not shown) formed on each of the first shift yoke 51A and the second shift yoke 51B, and the second finger portion 36A is fitted. 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 the first shifter shaft 52A extending in parallel with the input shaft 8, and the 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 the sleeve 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 the second shifter shaft 52D extending in parallel with the input shaft 8 via the connecting portion 52C, and the 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 the pair of gears excluding the pair of gears of the plurality of intermediate gears 24 and connects them to the intermediate shaft 11.

The third shift yoke 51C is connected to a third shifter shaft 52E extending in parallel with 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 the sleeve to the input shaft 8.

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

In FIGS. 4 and 5, the transmission 31 is provided with an interlock plate 37. The interlock plate 37 prevents the first finger portion 36A from being fitted to both the first shift yoke 51A and the second shift yoke 51B at the same time, and the second finger portion 36B is the third shift yoke. It prevents the 51C and the fourth shift yoke 51D from being fitted to both at the same time.

In FIGS. 4 and 6, the plate member 32 is provided with a boss portion 32C, and the boss portion 32C is provided with a detent pin 48. The detent pin 48 faces the detent cam 36E in a direction orthogonal to the axial direction of the shift and select axis 33.

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

The detent cam 36E and the detent pin 48 constitute a detent mechanism 38, and the detent mechanism 38 has a moving body 48C along the detent cam 36E when the shift and select shaft 33 moves in the axial direction and the rotational direction. Roll.

The detent mechanism 38 exerts an operating force on the shift and select shaft 33 by applying a pressing force of a coil spring 48B that presses the moving body 48C against the detent cam 36E when the detent cam 36E moves in the axial direction and the rotational direction. Give.

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

In FIG. 4, the plate member 32 is provided with a boss portion 32D, and the boss portion 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 axis 33.

The shift guide 36D is formed with a guide groove 36d having a shape along 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 tip portion 49a of the guide pin 49 comes into contact with the wall surface of the guide groove 36d corresponding to the shift stage. As a result, the amount of movement of the shift-and-select shaft 33 in the select direction and the shift direction is restricted, and the shift-and-select shaft 33 is prevented from rattling in the select direction and the shift direction.

A position sensor 50 is provided on the outer peripheral portion 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 axis 33 is in the neutral position, and transmits a detection signal to a control circuit (not shown). The magnet 36F of this embodiment constitutes the magnetic material of the present invention.

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

The tubular member 36 is shifted to the first finger portion 36A and the second finger portion 36B by pressing the shift yokes 51A, 51B, 51C, 51D to move the shift forks 53A, 53B, 53C, 53D in the shift direction. A shift lever 36C that rotates the shift and select shaft 33 in the shift direction by being pressed by the piston 46 is integrally provided.

As a result, the rigidity of the first finger portion 36A, the second finger portion 36B and the shift lever 36C is increased, and the first finger portion 36A and the first finger portion 36A and the reaction force from the shift yokes 51A, 51B, 51C and 51D are increased. The strength of the second finger portion 36B can be increased, and the strength of the shift lever 36C can be increased with respect to the load of the shift piston 46.

Therefore, it is possible to prevent the first finger portion 36A, the second finger portion 36B, and the shift lever 36C from rattling as compared with the conventional separate finger portion and shift lever, and the shift operation can be smoothly performed.

Further, by integrally providing the first finger portion 36A, the second finger portion 36BB, and the shift lever 36C with the tubular member 36, the first finger portion 36A and the second finger portion 36B are brought closer to the shift lever 36C. This makes it possible to further increase the rigidity of the first finger portion 36A, the second finger portion 36B, and the shift lever 36C.

Therefore, the load 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 brought close to each other, and the shift-and-select shaft 33 can be operated when the shift-and-select shaft 33 is operated. It is possible to prevent the 33 from bending with the tubular portions 32a and 32b as fulcrums.

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 shift operation, and the shift operation can be performed more smoothly.

Further, since the first finger portion 36A, the second finger portion 36B, and the shift lever 36C are integrally provided on the cylindrical member 36, the tubular member 36 can be assembled to the shift and select shaft 33 once. 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 assembly work of the transmission 31 can be improved.

Further, when a separate finger portion or shift lever is assembled to the shift and select axis as in the conventional case, if an assembly error of the separate finger portion or shift lever occurs, the error is accumulated and the finger is accumulated. The assembly accuracy of the part and the shift lever is greatly reduced.

On the other hand, in the tubular member 36 of the present embodiment, the first finger portion 36A, the second finger portion 36B, and the shift lever 36C are integrally provided, so that the first finger portion 36A and the second finger portion 36A are provided. It is possible to prevent an assembly error of the finger portion 36B and the shift lever 36C of the above and improve the assembly accuracy. Therefore, the speed change operation by the speed change device 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 located on the same side surface of the tubular member 36 in the axial direction of the shift and select shaft 33. They are installed side by side.

As a result, the plate member 32 is outward (forward oblique 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 with the shift and select shaft 33 interposed therebetween. It is possible to prevent the plate member 32 from protruding upward (upper side), and the plate member 32 can be downsized. As a result, the transmission can be downsized.

Further, according to the transmission 31 of the present embodiment, there is a detent mechanism 38 that applies an operating force when the shift-and-select shaft 33 rotates in the shift direction. 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 the moving body 48C of the detent pin 48.

As a result, in addition to the first finger portion 36A, the second finger portion 36B, and the shift lever 36C, the detent cam 36E can be integrally provided with the tubular member 36, and the detent cam 36E is a separate body, that is, a single body. It can be unnecessary to manufacture with. Therefore, the number of parts of the transmission 31 can be reduced, and the workability of the assembly work of 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 with respect to 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 on the opposite side of the shift and select shaft 33 from the shift lever 36C, and is the same as the shift lever 36C in the axial direction of the shift and select shaft 33. It is installed in the position.

As a result, the axial length of the tubular member 36 can be shortened as compared with the case where the detent cam 36E and the shift lever 36C are formed on the same side surface of the tubular member 36. Therefore, the axial length of the shift-and-select shaft 33 can be shortened, and the plate member 32 in which the shift-and-select shaft 33 is housed can be miniaturized. As a result, the transmission can be further miniaturized, and the automatic transmission 1 can be further miniaturized.

Further, since the shift lever 36C is installed inside the plate member 32, the transmission device 31 can be further miniaturized as compared with the shift lever protruding outward from the plate member 32.

Further, a reaction force applied to the shift lever 36C from the shift piston 46 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.

Therefore, the sliding resistance of the shift-and-select shaft 33 may increase in the cylindrical portions 32a and 32b during the shift operation.

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

As a result, it is possible to prevent a bending load from being applied to the shift-and-select shaft 33, and 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 a shift operation. As a result, the shift operation can be smoothly performed.

Further, according to the transmission 31 of the present embodiment, the tubular member 36 is provided with a shift guide 36D having a guide groove 36d having a shape along the shift pattern, and the shift guide 36D is a shift and select shaft 33. It is installed on the side opposite to the first finger portion 36A and the second finger portion 36B with the first finger portion 36A.

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

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

Further, when a load is applied from the shift piston 46 to the shift lever 36C during the shift operation, a reaction force is applied to either the first finger portion 36A or the second finger portion 36B 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, 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. Is added.

On the other hand, in the transmission 31 of the present embodiment, the shift guide 36D installed on the side opposite to the first finger portion 36A and the second finger portion 36B across the shift and select shaft 33 serves as a reinforcing member. , The shift and select shaft 33 can be reinforced to withstand the bending load.
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 shift operation, and the shift operation can be performed more smoothly.

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

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

As a result, the axial length of the tubular member 36 can be shortened 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 shortened, and the plate member 32 in which the shift-and-select shaft 33 is housed can be further miniaturized. As a result, the transmission can be further miniaturized, and the automatic transmission 1 can be further miniaturized.

Further, the rigidity of the tubular member 36 can be further increased by the magnet 36F having a 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 this 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 the hydraulic pressure generator 34, a shift piston 46, and a select piston 45 that moves 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 the shift and select shaft 33 is moved in the shift direction by the hydraulic pressure supplied from the hydraulic circuit 35.

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

As a result, the transmission 31 can be configured from the one in which the plate member 32, the hydraulic pressure generator 34, the hydraulic circuit 35, the select piston 45, and the shift piston 46 are integrated, and the automatic transmission 1 can be miniaturized.

Further, since 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, the transmission device 31 can be assembled. The attachment work can be easily performed in a short time, and the workability of the assembly work of the transmission 31 can be improved.

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

Although embodiments of the present invention have been disclosed, it will be apparent to those skilled in the art that modifications 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.

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 ... tubular 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) Generator), 42 ... Accumulator (Hydraulic pressure generator), 43 ... Oil pump (Hydraulic pressure generator), 44 ... Motor (Hydraulic pressure generator), 45 ... Select piston (Select operation member), 46 ... shift piston (shift operation member), 48 ... detent pin, 49 ... guide pin, 49a ... tip (tip of guide pin), 50 ... position sensor, 51A, 51B , 51C, 51D ... shift yoke, 53A, 53B, 53C, 53D ... shift fork

Claims (5)

A plate member attached to the transmission case so as to cover the opening of the transmission case,
A shift-and-select shaft that is attached to the plate member, is movable in the axial direction with respect to the plate member in response to a select operation, and rotates about an axis with respect to the plate member in response to a shift operation.
A cylindrical member attached to the outer peripheral portion 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 cylindrical member that press the shift yoke to move the shift fork in the shift direction.
A shift lever provided on the cylindrical member and rotated in the shift direction by being pressed by the shift operation member, and a shift lever.
It is equipped with a detent mechanism that applies an operating force when the shift-and-select axis rotates in the shift direction.
The detent mechanism has a detent pin provided on the plate member and a detent cam provided on the tubular member and in contact with the detent pin.
The detent cam is installed on the opposite side of the shift and select shaft from the shift lever and at the same position as the shift lever in the axial direction of the shift and select shaft. Transmission gear. A plate member attached to the transmission case so as to cover the opening of the transmission case,
A shift-and-select shaft that is attached to the plate member, is movable in the axial direction with respect to the plate member in response to a select operation, and rotates about an axis with respect to the plate member in response to a shift operation.
A cylindrical member attached to the outer peripheral portion 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 cylindrical member that press the shift yoke to move the shift fork in the shift direction.
A shift lever provided on the cylindrical member and rotated in the shift direction by being pressed by the shift operation member, and a shift lever.
It is equipped with a detent mechanism that applies an operating force when the shift-and-select axis rotates in the shift direction.
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 .
The detent mechanism has a detent pin provided on the plate member and a detent cam provided on the tubular member and in contact with the detent pin.
The vehicle is characterized in that the detent cam is installed on the opposite side of the shift and select shaft from the shift lever and at the same position as the shift lever in the axial direction of the shift and select shaft. A transmission for a dual-purpose transmission. The cylindrical member is provided with a shift guide having a guide groove shaped along the shift pattern.
The shift guide is installed on the side opposite to the finger portion with the shift and select shaft interposed therebetween.
The plate member has a tip portion to be inserted into the guide groove, and is provided with a guide pin that regulates the amount of movement of the shift and select shaft in the axial direction and the rotational direction. 1 or the transmission of the vehicle transmission according to claim 2. A magnetic material is provided on the cylindrical member, and the tubular member is provided with a magnetic material.
The magnetic material is installed on the side opposite to the finger portion with the shift and select shaft interposed therebetween.
The speed change of the vehicle transmission according to any one of claims 1 to 3 , wherein the plate member faces the magnetic body and has a position sensor for detecting the magnetic body. Device. It has a hydraulic pressure generator attached to the plate member and has
The plate member has a hydraulic circuit to which oil is supplied from the hydraulic pressure generator, a shift operation member, and a select operation member that moves the shift and select axis in the axial direction.
The shift operation member is provided so as to be fitted to the shift lever, and the shift and select shaft is moved in the shift direction by the hydraulic pressure supplied from the hydraulic circuit.
The claim is characterized in that the select operation member is provided so as to be located in the axial direction of the shift and select shaft, and the shift and select shaft is moved in the select direction by the hydraulic pressure supplied from the hydraulic circuit. The transmission for a vehicle transmission according to any one of claims 1 to 4.

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