JP2013087840A - Transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmission that is capable of reducing its length in a direction of rotation axis of the device and is advantageous in downsizing of the device.SOLUTION: The transmission 30 placed between a second MG 12 and an output shaft 18 includes: a first shaft 31 mounted with a first drive gear 33 and provided coaxially with a rotor 12b of the second MG 12; a hollow cylindrical second shaft 32 mounted with a second drive gear 34, with the first shaft 31 coaxially inserted thereinside; and a dog sleeve 41, placed inside the rotor 12b, for switching a connection destination of the rotor 12b. A first bearing 35 is provided to one end of the first shaft 31, a second bearing 36 is provided between the first shaft 31 and the second shaft 32, a third bearing 38 is provided on an outer periphery of the second shaft 32 so as to be radially alongside the second bearing 36, and the first drive gear 33 and the second drive gear 34 are arranged between the first bearing 35 and the third bearing 38.

Description

  The present invention relates to a transmission that shifts the rotation of a rotating electrical machine such as a motor / generator and transmits the rotation to an output member.

  A hybrid vehicle equipped with an internal combustion engine and an electric motor is known as a driving power source. As a power transmission device for such a hybrid vehicle, there is known a device configured to be able to transmit the rotation of an internal combustion engine and an electric motor to drive wheels via a transmission. For example, a planetary gear mechanism is provided as a transmission inside the rotor of an electric motor, and an internal combustion engine is connected to the ring gear of the planetary gear mechanism through an intermediate shaft and the rotor of the electric motor is connected to drive the sun gear. There is known a power transmission device in which a wheel is connected via a hollow cylindrical output shaft provided coaxially with an intermediate shaft (see Patent Document 1). In this apparatus, both ends of the output shaft are supported by the case via bearings. The intermediate shaft has one end supported by the case via a bearing and the other end supported by the output shaft via a bearing. In addition, there is Patent Document 2 as a prior art document related to the present invention.

Japanese Patent Laid-Open No. 06-179326 International Publication No. 09/051143

  In the apparatus of Patent Document 1, the planetary gear mechanism is disposed inside the rotor of the electric motor, so that the outer diameter of the electric motor may be increased. In place of the planetary gear mechanism, there is a method of providing a transmission that selectively connects any one of a plurality of transmission gear pairs having different transmission ratios to a rotor. However, in a transmission that is generally mounted on a manual type automobile, it is necessary to provide a sleeve for switching the transmission gear pair between the transmission gear pair. Therefore, the length of the rotating shaft provided with the sleeve is increased, and there is a possibility that the apparatus becomes longer in the axial direction of the rotating shaft. Moreover, in the apparatus of patent document 1, it is necessary to support the both ends of an intermediate shaft and an output shaft with a bearing, respectively. The remaining part of the intermediate shaft excluding one end is covered with the output shaft. Therefore, the gears of the transmission gear pair cannot be arranged in the portion between the bearings of the intermediate shaft. When providing a gear of a transmission gear pair on the intermediate shaft, it is necessary to dispose the gear outside the bearing. In this case, there is a possibility that the device becomes longer in the axial direction. Therefore, there exists a possibility that an apparatus may enlarge.

  Therefore, an object of the present invention is to provide a transmission that can reduce the length in the direction of the rotation axis of the device and is advantageous for downsizing the device.

  The transmission according to the present invention includes a first transmission gear pair and a second transmission gear pair having different transmission ratios, and is interposed between the rotating electrical machine and the output member, between the rotating electrical machine and the output member. In a transmission device capable of switching a transmission gear pair used for power transmission between the first transmission gear pair and the second transmission gear pair, one gear of the first transmission gear pair is attached so as to rotate integrally. A first shaft member provided coaxially with the rotor of the rotating electrical machine, a hollow cylindrical shape, and attached to an outer peripheral surface so that one gear of the second transmission gear pair rotates integrally, and at least the And at least one second shaft member having the first shaft member coaxially inserted therein so that one end of the first shaft member and one gear of the first transmission gear pair are disposed outside. Part is the low An arrangement that is disposed in a space formed on the inner periphery of the rotor and is movable between a first position where the rotor is connected to the first shaft member and a second position where the rotor is connected to the second shaft member. The first shaft member and the second shaft member are accommodated in a case, and the first shaft member is placed on one end of the first shaft member with respect to the case. A first bearing that is rotatably supported is provided, and the first shaft member and the second shaft member are relatively disposed between an outer peripheral surface of the first shaft member and an inner peripheral surface of the second shaft member. A second bearing that is rotatable is provided, and a third bearing that rotatably supports the second shaft member with respect to the case is arranged on the outer periphery of the second shaft member in a radial direction with the second bearing. Provided Between the bearing and the third bearing, the first speed change gear pair one gear and the second speed change gear pair one gear it has been allocated (claim 1).

  According to the transmission of the present invention, since at least a part of the engaging member is disposed in the inner space of the rotor, the length in the direction of the rotation axis of the minute device disposed in the space can be reduced. Further, according to the present invention, since one gear of each transmission gear pair is arranged between the first bearing and the third bearing, respectively, the rotation of the apparatus is compared with the case where these gears are arranged outside the bearing. The length in the direction of the axis can be further reduced. Therefore, the apparatus can be reduced in size.

  In one mode of the transmission according to the present invention, the first shaft member and the second shaft member may be rotatably supported by the case only by the first bearing and the third bearing. 2). According to this aspect, since the first shaft member and the second shaft member are rotatably supported by the case with only the first bearing and the third bearing, the bearings are compared with the case where the bearings are provided at both ends of each shaft member. Can be reduced. Therefore, the length in the direction of the rotation axis of the device can be further reduced.

  In one form of the transmission of the present invention, the first transmission gear pair and the second transmission gear pair are arranged on one side in the axial direction of the rotor, and the one side is opposite to the rotor across the rotor. Drive means for driving the engaging member to the first position and the second position may be provided on the other side of the rotor. According to this aspect, the first transmission gear pair, the second transmission gear pair, and the rotating electric machine can be brought close to each other, so that the apparatus can be reduced in size. Further, it is possible to prevent the components of the apparatus from being concentrated on one side of the rotating electrical machine.

  In this embodiment, the engagement member is provided so as to move in the axial direction, the drive means is an electric motor, and the rotating electrical machine includes a hollow cylindrical rotor shaft, and the rotor shaft is disposed in the rotor shaft. May be provided with a motion conversion mechanism for converting the rotational motion of the electric motor into linear motion in the axial direction (claim 4). By providing the motion conversion mechanism in the rotor shaft in this way, the length in the direction of the rotation axis of the apparatus can be reduced.

  In one form of the transmission according to the present invention, the transmission is mounted on a hybrid vehicle in which the rotating electrical machine and an internal combustion engine capable of driving the output member are provided as a driving power source. The engagement member may be provided so as to be further movable to a neutral position where the rotor is separated from both the first shaft member and the second shaft member. (Claim 5). According to this aspect, the rotating electrical machine can be separated from the output member by moving the engaging member to the neutral position. In this case, it is possible to prevent the rotary electric machine from being driven to rotate by the output member. Therefore, when the output member is driven by the internal combustion engine, the fuel consumption can be improved by moving the engagement member to the neutral position.

  As described above, according to the transmission of the present invention, at least a part of the engaging member is disposed in the inner circumferential space of the rotor, and the first shaft member and the second shaft member are disposed in the first bearing and the third shaft. Since it supports only with a bearing, the length of the direction of the axis of rotation of an apparatus can be reduced. Therefore, the apparatus can be reduced in size.

The figure which shows roughly the vehicle by which the transmission which concerns on one form of this invention is mounted. The figure which expands and shows a transmission. The figure which shows schematically the transmission when a dog sleeve is switched to the high speed position. The figure which shows schematically a transmission device when a dog sleeve is switched to the neutral position. The figure which shows the drive device seen from the direction of the axis line. The figure which shows the action | operation engagement table | surface which shows the relationship between the operation mode of 2nd MG, and the position of a dog sleeve.

  FIG. 1 schematically shows a vehicle equipped with a transmission according to an embodiment of the present invention. The vehicle 1 is configured as a so-called hybrid vehicle. The vehicle 1 is equipped with a drive device 2 for causing the vehicle 1 to travel. The drive device 2 is mounted on the front portion of the vehicle 1 and drives the front wheels. The driving device 2 includes an internal combustion engine 10, a first motor / generator (hereinafter sometimes abbreviated as first MG) 11, and a second motor / generator (hereinafter abbreviated as second MG) as a rotating electrical machine. 12). Since the internal combustion engine 10 is a well-known engine mounted on a hybrid vehicle, a detailed description thereof is omitted. The first MG 11 and the second MG 12 are well-known ones that function as an electric motor and a generator. The first MG 11 includes a rotor 11b that rotates integrally with a rotor shaft 11a as an output shaft, and a stator 11c that is coaxially disposed on the outer periphery of the rotor 11b and fixed to a case (not shown). Similarly, the second MG 12 includes a rotor 12b that rotates integrally with a rotor shaft 12a as an output shaft, and a stator 12c that is coaxially disposed on the outer periphery of the rotor 12b and fixed to the case.

  The output shaft 10 a of the internal combustion engine 10 and the rotor shaft 11 a of the first MG 11 are connected to the power distribution mechanism 13. The power distribution mechanism 13 includes a planetary gear mechanism 14. The planetary gear mechanism 14 is configured as a single pinion type planetary gear mechanism. The planetary gear mechanism 14 rotates a sun gear S as an external gear, a ring gear R as an internal gear arranged coaxially with the sun gear S, and a pinion gear P meshing with these gears S and R. And a carrier C capable of revolving around the sun gear S. The carrier C is connected to the output shaft 10a of the internal combustion engine 10 so as to rotate integrally. The output shaft 10a of the internal combustion engine 10 is also connected to the drive shaft 15a of the oil pump 15 so as to rotate integrally. The sun gear S is coupled to rotate integrally with the rotor shaft 11a of the first MG 11. The ring gear R is connected to rotate integrally with a drive gear 16 that is an external gear. As shown in this figure, the internal combustion engine 10, the first MG 11, the planetary gear mechanism 14, and the oil pump 15 are arranged coaxially on the first axis Ax1.

  As shown in the figure, the power split mechanism 13 is also connected with an output unit 17 for outputting power to drive wheels (not shown). The output unit 17 includes an output shaft 18 as an output member, a first driven gear 19, a second driven gear 20, and an output gear 21. The output shaft 18 is supported by the case 3 (see FIG. 2) through two bearings 22 so as to be rotatable around the second axis Ax2. The first driven gear 19, the second driven gear 20, and the output gear 21 are attached to the output shaft 18 so as to rotate coaxially and integrally. As shown in this figure, the first driven gear 19 is provided so as to mesh with the drive gear 16.

  The output unit 17 is connected to the second MG 12 via the transmission 30. FIG. 2 shows the second MG 12 and the transmission 30 in an enlarged manner. As shown in this figure, the second MG 12 and the transmission 30 are accommodated in the case 3. The rotor shaft 12a of the second MG 12 is formed in a hollow cylindrical shape. The rotor shaft 12a is supported by the case 3 so as to be rotatable about the third axis Ax3 via two ball bearings 23.

  The transmission 30 includes a first shaft 31 as a first shaft member and a hollow cylindrical second shaft 32 as a second shaft member. The first shaft 31 is provided coaxially with the rotor 12 b of the second MG 12 and in parallel with the output shaft 18. A first drive gear 33 that meshes with the first driven gear 19 is attached to the first shaft 31 so as to rotate integrally. The first shaft 31 is coaxially inserted into the second shaft 32 so that one end 31a and the first drive gear 33 are disposed outside. As shown in this figure, the first shaft 31 passes through the second shaft 32. Therefore, the other end 31 b of the first shaft 31 is also disposed outside the second shaft 32. A second drive gear 34 that meshes with the second driven gear 20 is attached to the outer peripheral surface of the second shaft 32 so as to rotate integrally. As shown in this figure, the second drive gear 34 is disposed at one end 32 a of the second shaft 32. The transmission gear ratio between the second driven gear 20 and the second drive gear 34 is set to a value smaller than the transmission gear ratio between the first driven gear 19 and the first drive gear 33. Therefore, the gear pair constituted by the first driven gear 19 and the first drive gear 33 corresponds to the first transmission gear pair of the present invention, and the gear pair constituted by the second driven gear 20 and the second drive gear 34 is provided. This corresponds to the second transmission gear pair of the present invention. The first drive gear 33 corresponds to one gear of the first transmission gear pair of the present invention, and the second drive gear 34 corresponds to one gear of the second transmission gear pair of the present invention.

  As shown in this figure, the first shaft 31 and the second shaft 32 are accommodated in the case 3. One end 31 a of the first shaft 31 is provided with a first bearing 35 that supports the first shaft 31 to be rotatable with respect to the case 3. Two second bearings 36 are provided between the outer peripheral surface of the first shaft 31 and the inner peripheral surface of the second shaft 32 so that the first shaft 31 and the second shaft 32 can rotate relative to each other. ing. A thrust bearing 37 that supports the first drive gear 33 so as to be rotatable from the direction of the third axis Ax is provided at one end portion 32a of the second shaft 32. A third bearing 38 that rotatably supports the second shaft 32 with respect to the case 3 is provided on the outer periphery of the second shaft 32. The third bearing 38 is provided so as to be aligned with the second bearing 36 in the radial direction. As shown in this figure, the first drive gear 33 and the second drive gear 34 are disposed between the first bearing 35 and the third bearing 38. Further, the first shaft 31 and the second shaft 32 are rotatably supported with respect to the case 3 through only the first bearing 35 and the third bearing 38. A known ball bearing is used for the first bearing 35 and the third bearing 38. A known needle bearing is used for the second bearing 36. An oil passage 31c for supplying oil into the second bearing 36 and the rotor shaft 12a is provided inside the first shaft 31.

  The transmission 30 includes a shift speed switching mechanism 40 that switches the connection destination of the rotor shaft 12 a of the second MG 12 between the first shaft 31 and the second shaft 32. The gear position switching mechanism 40 includes a dog sleeve 41 as an engaging member. On the inner periphery of the rotor shaft 12a of the second MG 12, dog teeth 12d extending in the direction of the third axis Ax3 are provided. Further, dog teeth 41 a extending in the direction of the third axis Ax3 are also provided on the outer periphery of the dog sleeve 41. The dog sleeve 41 is coaxially provided inside the rotor shaft 12a so that the dog teeth 41a mesh with the dog teeth 12d of the rotor shaft 12a. Thereby, the dog sleeve 41 is supported by the rotor shaft 12a so as to rotate integrally with the rotor shaft 12a and to move in the direction of the third axis Ax3. Similarly to the outer periphery, dog teeth 41b extending in the direction of the third axis Ax3 are provided on the inner periphery of the dog sleeve 41. The other end 31b of the first shaft 31 is provided with dog teeth 31d that can mesh with the dog teeth 41b. The other end 32 b of the second shaft 32 is provided with dog teeth 32 c that can mesh with the dog teeth 41 a on the outer periphery of the dog sleeve 41.

  In the gear position switching mechanism 40, the connection destination of the rotor shaft 12a of the second MG 12 is switched by driving the dog sleeve 41 between the low speed position shown in FIGS. 1 and 2 and the high speed position shown in FIG. FIG. 3 schematically shows the transmission 30 when the dog sleeve 41 is switched to the high speed position. As shown in FIGS. 1 and 2, at the low speed position, the dog teeth 41a on the outer periphery of the dog sleeve 41 mesh with the dog teeth 12d of the rotor shaft 12a, and the dog teeth 41b on the inner periphery mesh with the dog teeth 31d of the first shaft 31. At this position, the outer dog teeth 41 a do not mesh with the dog teeth 32 c of the second shaft 32. Therefore, at this low speed position, as indicated by the broken line L1 in FIG. 2, the rotor shaft 12a of the second MG 12 and the first shaft 31 are connected so as to be able to transmit power. Therefore, the low speed position corresponds to the first position of the present invention.

  On the other hand, as shown in FIG. 3, at the high speed position, the dog teeth 41a on the outer periphery of the dog sleeve 41 mesh with the dog teeth 12d of the rotor shaft 12a and the dog teeth 32c of the second shaft 32, respectively. At this position, the dog teeth 41b on the inner periphery of the dog sleeve 41 and the dog teeth 31d of the first shaft 31 are disengaged. Therefore, at this high speed position, as indicated by a broken line L2 in FIG. 2, the rotor shaft 12a of the second MG 12 and the second shaft 32 are connected so that power can be transmitted. Therefore, the high speed position corresponds to the second position of the present invention. Between the low speed position and the high speed position, as shown in FIG. 4, the dog teeth 41 b on the inner periphery of the dog sleeve 41 do not mesh with the dog teeth 31 d of the first shaft 31, and the dog teeth 41 a on the outer periphery of the dog sleeve 41 A neutral position where the dog teeth 32c of the second shaft 32 are not engaged with each other is provided. In this position, the second MG 12 is disconnected from both the first shaft 31 and the second shaft 32.

  The gear stage switching mechanism 40 includes an electric motor 42 as a driving unit that drives the dog sleeve 41 in the direction of the third axis Ax. As shown in FIG. 2, the outer diameter of the electric motor 42 is smaller than the outer diameter of the second MG 12. The electric motor 42 is fixed to the case 3. As shown in this figure, the first drive gear 33 and the second drive gear 34 are arranged on one side of the second MG 12 in the direction of the third axis Ax3. The electric motor 42 is disposed on the other side opposite to the one side of the second MG 12. A dog sleeve 41 is attached to the output shaft 42 a of the electric motor 42 via a motion conversion mechanism 43. The motion conversion mechanism 43 is a mechanism that converts the rotational motion of the output shaft 42a of the electric motor 42 into linear motion in the direction of the third axis Ax3. The motion converting mechanism 43 moves the dog sleeve 41 in the right direction in FIG. 2 when the output shaft 42a rotates in a predetermined direction, and the dog sleeve 41 when the output shaft 42a rotates in the opposite direction opposite to the predetermined direction. Is moved to the left in FIG. As the motion conversion mechanism 43, for example, a screw mechanism or a ball screw mechanism is used. The motion conversion mechanism 43 may be a mechanism that amplifies force when converting rotational motion into linear motion.

  FIG. 5 shows the drive device 2 as seen from the direction of the axis. As shown in this figure, the driving device 2 includes a differential mechanism 24. The differential mechanism 24 is connected to drive wheels of the vehicle 1 via a drive shaft 25. A diff ring gear 24 a is provided in the case of the differential mechanism 24. The output gear 21 meshes with the diff ring gear 24a. The differential mechanism 24 is a known mechanism that distributes the power transmitted to the diff ring gear 24a to the left and right drive wheels. Therefore, detailed description is omitted.

  As shown in this figure, a front side member Sm extending in the front-rear direction of the vehicle 1 (left-right direction in FIG. 5) is provided at the front portion of the vehicle 1. The drive device 2 is arranged such that the electric motor 42 is positioned below the front side member Sm of the vehicle 1 and the second MG 12 is positioned on the side of the front side member Sm.

  The position of the dog sleeve 41 in each operation mode of the second MG 12 will be described with reference to FIG. As the operation mode of the second MG 12, a low speed mode, a high speed mode, and a free mode are set. The low speed mode is selected when the vehicle 1 is driven at a low speed by the second MG 12. The high speed mode is selected when the vehicle 1 is driven at a high speed by the second MG 12. The free mode is selected when the vehicle 1 is driven by the internal combustion engine 10 or the like. As described above, the gear ratio between the second driven gear 20 and the second drive gear 34 is smaller than the gear ratio between the first driven gear 19 and the first drive gear 33. Therefore, as shown in this figure, in the low speed mode, the dog sleeve 41 is switched to the low speed position. On the other hand, in the high speed mode, the dog sleeve 41 is switched to the high speed position. In the free mode, the dog sleeve 41 is switched to the neutral position. As described above, when the dog sleeve 41 is set to the neutral position, the second MG 12 is disconnected from both the first shaft 31 and the second shaft 32. Therefore, the second MG 12 is disconnected from the output shaft 18. As a result, it is possible to prevent the second MG 12 from being rotationally driven by the output shaft 18, so that the power of the internal combustion engine 10 can be prevented from being consumed by the second MG 12.

  As described above, according to the present invention, the dog sleeve 41 and the motion conversion mechanism 43 are provided in the rotor shaft 12a of the second MG 12, and the dog sleeve 41 is disposed in the space inside the rotor 12b. The length in the direction of the triaxial line Ax3 can be reduced. Moreover, since only the dog sleeve 41 of the transmission 30 is disposed inside the rotor 12b, it is possible to suppress an increase in the outer diameter of the second MG 12. In the present invention, since the first drive gear 33 and the second drive gear 34 are disposed between the first bearing 35 and the third bearing 38, the first drive gear 33 and the second drive gear 34 are compared with the case where these gears are disposed outside the bearing. The length in the direction of the triaxial line Ax can be reduced. In the present invention, the first shaft 31 and the second shaft 32 are supported by the case 3 so as to be rotatable only by the first bearing 35 and the third bearing 38. Therefore, the number of bearings can be reduced as compared with the case where bearings are provided at both ends of the shafts 31 and 32. As a result, the length of the transmission 30 in the direction of the third axis Ax3 can be further reduced. Therefore, the transmission 30 can be reduced in size.

  In the present invention, the electric motor 42 having an outer diameter smaller than that of the second MG 12 is disposed on the other side opposite to the one side on which the drive gears 33 and 34 are disposed with the second MG 12 interposed therebetween. Therefore, the drive gears 33 and 34 and the second MG 12 can be brought close to each other. Therefore, the transmission 30 can be further downsized.

  In the transmission 10 of the present invention, the dog sleeve 41 is switched to the neutral position when the vehicle 1 is driven by the internal combustion engine 10. As a result, the power of the internal combustion engine 10 can be prevented from being consumed by the second MG 12, and the fuel efficiency can be improved.

  This invention is not limited to each form mentioned above, It can implement with a various form. For example, the motion conversion mechanism may not be arranged in the rotor shaft. Further, the entire dog sleeve may not be disposed within the rotor shaft, and a part thereof may be disposed outside the rotor shaft. The drive source for driving the dog sleeve is not limited to the electric motor. The dog sleeve may be driven by various actuators such as a hydraulic cylinder.

DESCRIPTION OF SYMBOLS 1 Vehicle 3 Case 10 Internal combustion engine 12 2nd motor generator 12a Rotor shaft 12b Rotor 18 Output shaft (output member)
30 Transmission 31 First shaft (first shaft member)
31a One end of the first shaft 32 Second shaft (second shaft member)
33 First drive gear (one gear of the first transmission gear pair)
34 Second drive gear (one gear of the second transmission gear pair)
35 First bearing 36 Second bearing 38 Third bearing 41 Dog sleeve (engaging member)
42 Electric motor (drive means)
43 Motion conversion mechanism

Claims (5)

A first speed change gear pair and a second speed change gear pair having different speed ratios are provided, and are used for power transmission between the rotating electrical machine and the output member, interposed between the rotating electrical machine and the output member. In a transmission capable of switching a gear pair between the first transmission gear pair and the second transmission gear pair,
A first shaft member attached so that one gear of the first transmission gear pair rotates integrally and provided coaxially with the rotor of the rotating electrical machine, and formed in a hollow cylindrical shape on the outer peripheral surface, the second transmission gear. The first gear is mounted such that one gear of the gear pair rotates integrally, and at least one end of the first shaft member and one gear of the first transmission gear pair are arranged outside. A second shaft member in which the shaft member is coaxially inserted, and a first position where at least a part is disposed in a space formed on the inner periphery of the rotor and the rotor is connected to the first shaft member And an engaging member movable to a second position where the rotor is coupled to the second shaft member,
The first shaft member and the second shaft member are accommodated in a case,
A first bearing that rotatably supports the first shaft member with respect to the case is provided at one end of the first shaft member,
Between the outer peripheral surface of the first shaft member and the inner peripheral surface of the second shaft member, a second bearing is provided that allows the first shaft member and the second shaft member to rotate relative to each other.
A third bearing that rotatably supports the second shaft member with respect to the case is provided on the outer periphery of the second shaft member so as to be aligned in the radial direction with the second bearing.
A transmission in which one gear of the first transmission gear pair and one gear of the second transmission gear pair are arranged between the first bearing and the third bearing.   The transmission according to claim 1, wherein the first shaft member and the second shaft member are rotatably supported by the case only by the first bearing and the third bearing. The first transmission gear pair and the second transmission gear pair are arranged on one side in the axial direction of the rotor;
The driving means for driving the engaging member to the first position and the second position is provided on the other side of the rotor opposite to the one side with the rotor interposed therebetween. Or 2. The transmission according to 2. The engaging member is provided to move in the axial direction,
The driving means is an electric motor;
The rotating electrical machine includes a hollow cylindrical rotor shaft,
The transmission according to claim 3, wherein a motion conversion mechanism that converts the rotational motion of the electric motor into linear motion in the axial direction is provided in the rotor shaft. The transmission is mounted on a hybrid vehicle in which the rotating electrical machine and an internal combustion engine capable of driving the output member are provided as a driving power source,
The output member is connected to drive wheels of the vehicle so that power can be transmitted,
The speed change according to any one of claims 1 to 4, wherein the engagement member is further movably provided at a neutral position where the rotor is separated from both the first shaft member and the second shaft member. apparatus.

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