JP2020085094A - Power transmission device - Google Patents

Abstract

To provide a power transmission device capable of switching a transmission mode of power from an input shaft portion to an output shaft portion, and being miniaturized.SOLUTION: A power transmission device 20 transmits power of a driving motor 11 from an input shaft portion 14 to an output shaft portion 15. The power transmission device 20 has a displacement rotor 21, a fixed rotor 22 and a brake device 24. The displacement rotor 21 is engaged with the input shaft portion 14. The fixed rotor 22 is fixed to the output shaft portion 15. The brake device 24 has a brake rotor 63. The brake rotor 63 is mounted on the displacement rotor 21 in a state of enabling both of relative movement in an axial direction α to the displacement rotor 21, and rotation with the displacement rotor 21. The displacement rotor 21 is moved in the axial direction α in a case where the rotation of the displacement rotor 21 is restricted by restricting the rotation of the brake rotor 63 by the brake device 24.SELECTED DRAWING: Figure 1

Description

The disclosure of this specification relates to a power transmission device.

As a power transmission device for transmitting power from an input shaft portion to an output shaft portion, for example, Patent Document 1 discloses a parking lock mechanism that shifts between a locked state and an unlocked state of an output shaft portion of a transmission mounted on a vehicle. Is disclosed. This park lock mechanism has a gear, a park pole, a detent lever, a motor, and a detent spring. The gear is fixed to the output shaft of the transmission, and the park pole is movable to a lock position that meshes with the gear and prevents the output shaft from rotating. The detent lever is connected to both the park pole and the motor, rotates with the driving of the motor, and moves the park pole to the lock position with the rotation. When the park pole is in the locked position, the detent spring roller is in the recess of the detent lever. In this case, the detent spring blocks the rotation of the detent lever, whereby the output shaft of the transmission is held in a locked state.

Japanese Patent Laid-Open No. 2016-211658

However, in Patent Document 1, the motor for rotating the detent lever is a dedicated motor for locking the output shaft portion of the speed change shaft, and is provided at a position separated from the output shaft portion. Further, a detent spring that blocks the rotation of the detent lever is a dedicated member for holding the output shaft portion in a locked state, and is provided at a position separated from the output shaft portion. As described above, in Patent Document 1, it is necessary to secure the installation space for the motor and the installation space for the detent spring at a position separated from the output shaft portion, and thus there is a concern that the power transmission device may become large.

A main object of the present disclosure is to provide a power transmission device capable of switching a power transmission mode from an input shaft portion to an output shaft portion and further achieving miniaturization.

In order to achieve the above object, the disclosed first aspect is
A power transmission device (20) for transmitting power from an input shaft part to an output shaft part so that the output shaft part (15) rotates together with the input shaft part (14) which rotates by the power of the power source (11). ,
A rotating body (21) that rotates together with a first shaft portion (14), which is one of an input shaft portion and an output shaft portion, and regulates rotation of the first shaft portion by being caught by a predetermined receiving member (61). The rotation restricting position (P) and the first shaft portion and the second shaft portion (15) that are not the first shaft portion of the input shaft portion and the output shaft portion without being caught by the receiving member. A rotating body (21) movable to a rotation position (D, R) for rotating both of the shaft portions,
Equipped with
The rotating body is a power transmission device that extends in a tubular shape along the outer peripheral surface of the first shaft portion and is provided coaxially with the first shaft portion at both the rotation restriction position and the rotation position.

According to the first aspect, when the rotating body provided on the first shaft portion is in the rotation position, the rotating body is in a state of being caught by the second shaft portion, so that the input shaft is driven by the power of the power source. The output shaft unit rotates together with the unit. On the other hand, when the rotating body is in the rotation restricting position, the rotating body is caught by the receiving member, so that the output shaft portion does not rotate depending on the power of the power source. Therefore, the power transmission device can be switched between the state in which the output shaft portion rotates and the state in which the output shaft portion does not rotate simply by moving the rotating body to the rotation position and the rotation restriction position.

Moreover, the rotating body is coaxial with the first shaft portion at both the rotation restriction position and the rotation position. Therefore, it is necessary to dispose the configuration in which the rotating body is caught on the second shaft portion and the configuration in which the rotating body is caught on the receiving member at a position separated from the first shaft portion and the second shaft portion in the radial direction of the first shaft portion. There is no. Therefore, in the power transmission device, the mode of power transmission from the input shaft portion to the output shaft portion can be switched, and further, the size of the power transmission device can be reduced.

The second aspect is
A power transmission device (20) for transmitting power from an input shaft part to an output shaft part so that the output shaft part (15) rotates together with the input shaft part (14) which rotates by the power of the power source (11). ,
A rotating body (21) that rotates together with a first shaft portion (14), which is one of an input shaft portion and an output shaft portion, and regulates rotation of the first shaft portion by being caught by a predetermined receiving member (61). The rotation restricting position (P) and the first shaft portion and the second shaft portion (15) that are not the first shaft portion of the input shaft portion and the output shaft portion without being caught by the receiving member. A rotational position (D, R) for rotating both of the shaft parts, and a rotating body (21) movable relative to the first shaft part,
A motion conversion unit (24, 31a) for converting the rotational movement of the input shaft portion into a rectilinear movement in which the rotation body moves straight along the first shaft portion so that the rotation body moves between the rotation position and the rotation restriction position;
Is a power transmission device.

According to the second aspect, similarly to the first aspect, by simply moving the rotating body between the rotation restricting position and the rotation position, the power transmission device can be placed in a state in which the output shaft portion rotates and a state in which the output shaft portion does not rotate. Can be switched to.

Moreover, the motion converting unit converts the rotational motion of the input shaft into the linear motion of the rotating body. In this configuration, since the rotating body moves to the rotation restricting position and the rotating position by the rotation of the input shaft portion, it is not necessary to provide the power transmission device with a dedicated power source such as a dedicated motor for moving the rotating body. .. Therefore, similarly to the first aspect, it is possible to realize a power transmission device that can switch the power transmission mode from the input shaft portion to the output shaft portion, and at the same time, downsize the power transmission device.

The third aspect is
A power transmission device (20) for transmitting power from an input shaft part to an output shaft part so that the output shaft part (15) rotates together with the input shaft part (14) which rotates by the power of the power source (11). ,
A rotating body (21) that rotates together with a first shaft portion (14), which is one of an input shaft portion and an output shaft portion, and which is the second of the input shaft portion and the output shaft portion that is not the first shaft portion. Relative to the first shaft portion, the connection position (D, P, R) connected to the shaft portion (15) and the connection release position (N) in which the connection with the second shaft portion is released. A rotatable body (21) that is movable,
Equipped with
The rotating body is a power transmission device that extends in a tubular shape along the outer peripheral surface of the first shaft portion and is provided coaxially with the first shaft portion at both the rotation restriction position and the rotation position.

According to the third aspect, when the rotating body is in the connection position, the rotating body provided on the first shaft portion is caught by the second shaft portion, so that the output shaft portion rotates together with the input shaft portion by the power of the power source. To do. On the other hand, when the rotating body is in the disconnection position, the rotating body provided on the first shaft portion does not catch on the second shaft portion, so that even if one of the first shaft portion and the second shaft portion rotates, the other Does not rotate. That is, the output shaft does not rotate even if the input shaft rotates due to the power of the power source. Therefore, by simply moving the rotating body between the connection position and the connection release position, the power transmission device can be switched between the state in which the output shaft portion rotates and the state in which the output shaft portion does not rotate.

Moreover, as in the case of the first aspect, since the rotating body is coaxial with the first shaft portion at both the rotation restriction position and the rotation position, the power transmission mode from the input shaft portion to the output shaft portion can be changed. It is possible to reduce the size of the power transmission device while realizing the power transmission device that can be switched.

The fourth aspect is
A power transmission device (20) for transmitting power from an input shaft part to an output shaft part so that the output shaft part (15) rotates together with the input shaft part (14) which rotates by the power of the power source (11). ,
A rotating body (21) that rotates together with a first shaft portion (14), which is one of an input shaft portion and an output shaft portion, and which is the second of the input shaft portion and the output shaft portion that is not the first shaft portion. Relative to the first shaft portion, the connection position (D, R, P) connected to the shaft portion (15) and the connection release position (N) in which the connection with the second shaft portion is released. A rotatable body (21) that is movable,
A motion conversion unit (24, 31a) that converts the rotational motion of the input shaft unit into a rectilinear motion that advances straight along the first shaft unit so that the rotating body moves between the connection position and the connection release position;
Is a power transmission device.

According to the fourth aspect, similarly to the third aspect, by simply moving the rotating body between the connecting position and the disconnecting position, the power transmission device can be placed in a state where the output shaft portion rotates and a state where the output shaft portion does not rotate. Can be switched to.

Moreover, similarly to the second aspect, since the rotational movement of the input shaft portion is converted into the rectilinear movement of the rotating body by the movement conversion portion, it is possible to switch the power transmission mode from the input shaft portion to the output shaft portion. It is possible to reduce the size of the power transmission device while realizing the power transmission device.

It should be noted that the claims and the reference numerals in parentheses described in this section merely show the correspondence with the specific means described in the embodiments described later, and do not limit the technical scope of the present disclosure. Absent.

1 is a schematic diagram showing the configuration of a drive system in a first embodiment. Sectional drawing in an axial direction which shows the structure of a displacement rotary body. III-III sectional view taken on the line of FIG. Sectional drawing in an axial direction which shows the structure of a 1st fixing member. The VV sectional view taken on the line of FIG. Sectional drawing in an axial direction which shows the structure of a 2nd fixing member. VII-VII sectional view taken on the line of FIG. VIII-VIII sectional view taken on the line of FIG. Sectional drawing in an axial direction which shows the structure of a brake device. XX sectional view taken on the line of FIG. XI-XI sectional view taken on the line of FIG. Sectional drawing in the direction orthogonal to an axial direction which shows the positional relationship of a displacement rotary body and a fixed rotary body, when a displacement rotary body exists in a drive position. Sectional drawing in the direction orthogonal to an axial direction which shows the positional relationship of a displacement rotary body and a fixed rotary body about the case where a displacement rotary body is in a reverse position. Sectional drawing in the direction orthogonal to an axial direction which shows the positional relationship of a displacement rotary body and a fixed rotary body, when a displacement rotary body is in a parking position. The figure which shows the relationship between the rotation direction of an input shaft part, and the moving direction of a displacement rotator, when a displacement rotator is in a neutral position. The figure which shows the position of a displacement rotary body when a displacement rotary body reaches a drive position. The figure which shows the relationship of the rotation direction of an input shaft part and an output shaft part, when a displacement rotating body is in a drive position. The figure which shows the relationship between the rotation direction of an input shaft part, and the moving direction of a displacement rotator, when a displacement rotator is in a neutral position. The figure which shows the position of a displacement rotary body when a displacement rotary body reaches|attains a reverse position. The figure which shows the relationship of the rotation direction of an input shaft part and an output shaft part, when a displacement rotating body is in a reverse position. The figure which shows the position of a displacement rotary body, when a displacement rotary body reaches a parking position. The flowchart which shows the procedure of a range switching process. The schematic diagram showing the composition of the drive system in a 2nd embodiment.

Hereinafter, a plurality of embodiments of the present disclosure will be described with reference to the drawings. In addition, in each of the embodiments, the corresponding components may be denoted by the same reference numerals, and redundant description may be omitted. In the case where only a part of the configuration is described in each embodiment, the configurations of the other examples described above can be applied to the other parts of the configuration. Further, not only the combination of the configurations explicitly described in the description of each embodiment, but also if the combination does not cause any trouble, the configurations of the plurality of embodiments can be partially combined even if they are not explicitly described. Further, unspecified combinations of the configurations described in the plurality of embodiments and the modified examples are also disclosed by the following description.

(First embodiment)
The drive system 10 shown in FIG. 1 is installed in an electric vehicle as a vehicle. The drive system 10 includes a drive motor 11, a transmission 12, an input shaft portion 14, an output shaft portion 15, a power transmission device 20, and an ECU 70. The drive motor 11 is a rotary electric machine such as a motor generator, and is a power source for operating the vehicle. The drive motor 11 is capable of causing the vehicle to travel as it is driven, and corresponds to an electric travel drive source.

The transmission 12 is a device that transmits the power output from the drive motor 11 to the axle as a rotational drive force. The transmission 12 converts the rotation speed of the drive motor 11 into a desired rotation speed, and rotates the axle according to the converted rotation speed. The transmission 12 is an automatic transmission, a continuously variable transmission, or the like.

The input shaft portion 14 is connected to the drive motor 11 and rotates as the drive motor 11 is driven. The output shaft portion 15 is connected to the transmission 12 and rotates the axle via the transmission 12. The input shaft portion 14 and the output shaft portion 15 are arranged in series. The center line CL of the input shaft portion 14 and the center line of the output shaft portion 15 coincide with each other, and the input shaft portion 14 and the output shaft portion 15 rotate about which center line CL as an axis.

In the present embodiment, as shown in FIGS. 1 and 3, the direction in which the center line CL of the input shaft portion 14 extends is referred to as the axial direction α, and the direction in which the virtual straight line orthogonal to the center line CL extends is referred to as the radial direction β. A direction extending along the center line CL is referred to as a circumferential direction γ. The axial direction α, the radial direction β, and the circumferential direction γ are orthogonal to each other. Further, in the axial direction α, the input shaft portion 14 side may be referred to as an input side, and the output shaft portion 15 side may be referred to as an output side.

The power transmission device 20 transmits the power of the drive motor 11 to the transmission 12. The power transmission device 20 is provided between the drive motor 11 and the transmission 12 in the path through which power is transmitted. The power transmission device 20 is connected to the drive motor 11 via the input shaft portion 14 and is connected to the transmission 12 via the output shaft portion 15. When the input shaft portion 14 rotates due to the driving of the drive motor 11, the power transmission device 20 applies power to the output shaft portion 15 from the input shaft portion 14 so that the output shaft portion 15 rotates together with the input shaft portion 14. introduce.

The power transmission device 20 can be switched between a connected state in which the input shaft portion 14 and the output shaft portion 15 are connected and a disconnected state in which the connection between the input shaft portion 14 and the output shaft portion 15 is released. .. When the power transmission device 20 is in the connected state, the output shaft portion 15 rotates as the input shaft portion 14 rotates. In this case, it can be said that the power transmission device 20 is in a transmission state in which power is transmitted from the input shaft portion 14 to the output shaft portion 15. When the power transmission device 20 is in the disconnected state, the output shaft portion 15 does not rotate even if the input shaft portion 14 rotates. In this case, it can be said that the power transmission device 20 is in a non-transmission state in which power is not transmitted from the input shaft portion 14 to the output shaft portion 15.

The power transmission device 20 can be switched between an input restriction state in which the rotation of the input shaft portion 14 is restricted and an input permission state in which the rotation of the input shaft portion 14 is allowed. The power transmission device 20 is also in the connection state when it is in the input regulation state. In this case, the power transmission device 20 also regulates the rotation of the output shaft portion 15 by regulating the rotation of the input shaft portion 14.

The power transmission device 20 includes a displacement rotary body 21, a fixed rotary body 22, and a brake device 24.

The displacement rotator 21 extends along the center line CL and is formed in a tubular shape such as a cylindrical shape as a whole. The displacement rotating body 21 is attached to the input shaft portion 14 and can be displaced relative to the input shaft portion 14. The displacement rotating body 21 is provided on the outer peripheral side of the input shaft portion 14 and extends along the outer peripheral surface of the input shaft portion 14. The center line of the displacement rotor 21 coincides with the center line CL of the input shaft portion 14. That is, the displacement rotating body 21 is provided coaxially with the input shaft portion 14. In this case, the input shaft portion 14 is in a state of being inserted into the displacement rotating body 21. The input shaft portion 14 corresponds to the first shaft portion, the output shaft portion 15 corresponds to the second shaft portion, and the displacement rotary body 21 corresponds to the rotary body that rotates together with the first shaft portion. Further, the displacement rotating body 21 can also be referred to as a shift member.

The fixed rotating body 22 extends along the center line CL and is formed in a tubular shape such as a cylindrical shape as a whole. The fixed rotating body 22 is attached to the output shaft portion 15, and is fixed to the output shaft portion 15 by welding or the like so as not to be displaced relative to the output shaft portion 15. The fixed rotating body 22 is provided side by side on the output shaft portion 15 in the axial direction α, and is fixed to the input side end portion of the output shaft portion 15. The center line of the fixed rotating body 22 coincides with the center line of the output shaft portion 15. The displacement rotator 21 can be hooked on the fixed rotator 22, and when the displacement rotator 21 is hooked on the fixed rotator 22, the fixed rotator 22 rotates together with the displacement rotator 21. Note that the displacement rotor 21 is caught on the output shaft portion 15 when the displacement rotor 21 is caught on the fixed rotor body 22 due to the fixed rotor 22 being integrated with the output shaft portion 15. It is equivalent to the state.

The power transmission device 20 shifts between the connected state and the disconnected state by the displacement rotor 21 being displaced relative to the input shaft portion 14. The displacement rotary body 21 is movable to a connection position connected to the fixed rotary body 22 and a connection release position where the connection with the fixed rotary body 22 is released. The power transmission device 20 is in the connected state when the displacement rotor 21 is in the connection position, and is in the disconnected state when the displacement rotor 21 is in the disconnection position. The connection position and the connection release position are arranged in the axial direction α as relative positions with respect to the input shaft portion 14. When the displacement rotating body 21 is in the connecting position, the output shaft portion 15 rotates together with the input shaft portion 14. Therefore, in the displacement rotating body 21, the connection position corresponds to the rotation position.

Further, the power transmission device 20 shifts between the input regulation state and the input permission state by the displacement rotating body 21 being displaced. The displacement rotator 21 can be moved between an input restriction position that restricts the rotation of the input shaft portion 14 and an input permission position that allows the rotation of the input shaft portion 14. The power transmission device 20 is in the input regulation state when the displacement rotor 21 is in the input regulation position, and is in the input permission state when the displacement rotor 21 is in the input permission position. The input regulation position and the input permission position are arranged in the axial direction α as relative positions with respect to the input shaft portion 14. When the displacement rotor 21 is in the input regulation position, the rotation of the input shaft portion 14 is regulated. Therefore, in the displacement rotator 21, the input regulation position corresponds to the rotation regulation position.

The displacement rotor 21 is coaxial with the input shaft portion 14 in any of the connection position, the connection release position, the rotation position, the rotation restriction position, the input restriction position, and the input permission position.

The displacement rotator 21 is displaced by a driver operating a shift lever as an operation lever. The displacement rotating body 21 is movable to a drive position D, a reverse position R, a parking position P, and a neutral position N according to the shift position of the shift lever. The drive position D, the reverse position R, the parking position P, and the neutral position N are arranged in the axial direction α as relative positions with respect to the input shaft portion 14. The power transmission device 20 and the transmission 12 have a drive range, a reverse range, a parking range, and a neutral range as a vehicle shift range. The drive position D, reverse position R, parking position P, and neutral position N correspond to the drive range, reverse range, parking range, and neutral range, respectively.

The connection position of the displacement rotating body 21 includes a drive position D and a reverse position R. When the displacement rotator 21 is in the drive position D or the reverse position R, the input shaft portion 14 and the output shaft portion 15 are in the connected state, so that the output shaft portion 15 rotates together with the input shaft portion 14. In this way, the drive position D and the reverse position R also correspond to the input permission position.

When the displacement rotor 21 is at the drive position D, the input shaft portion 14 and the output shaft portion 15 rotate in a direction in which the vehicle moves forward. When the displacement rotor 21 is at the reverse position R, the shaft portions 14 and 15 rotate in the direction in which the vehicle is moved backward. The rotation directions of the shaft portions 14 and 15 are opposite when the displacement rotor 21 is at the drive position D and at the reverse position R. The rotation of the shaft portions 14 and 15 when the displacement rotor 21 is in the drive position D is referred to as forward rotation, and the rotation of the shaft portions 14 and 15 when the displacement rotor 21 is in the reverse position R is referred to as reverse rotation.

The neutral position N is included in the disconnection position of the displacement rotator 21. When the displacement rotator 21 is in the neutral position N, the connection between the input shaft portion 14 and the output shaft portion 15 is released, so that the output shaft portion 15 rotates even if the input shaft portion 14 rotates. do not do. Thus, the neutral position N also corresponds to the input permission position. On the other hand, when the displacement rotating body 21 is in the neutral position N, the rotation of the output shaft portion 15 is not restricted.

The parking position P is included in the input regulation position of the displacement rotator 21. When the displacement rotator 21 is at the parking position P, the rotation of the input shaft portion 14 is restricted. Further, when the displacement rotating body 21 is at the parking position P, the input shaft portion 14 and the output shaft portion 15 are in a connected state. That is, the parking position P corresponds to the input regulation position and the connection position of the displacement rotating body 21. Therefore, when the displacement rotating body 21 is at the parking position P, rotation of both the input shaft portion 14 and the output shaft portion 15 is restricted.

Thus, the drive position D and the reverse position R correspond to the connection position and the input permission position, the neutral position N corresponds to the disconnection position and the input permission position, and the parking position P corresponds to the connection position and the input regulation position. .. As described above, the drive position D and the reverse position R correspond to the rotation position, and the parking position P corresponds to the rotation restriction position.

As shown in FIGS. 2 and 3, the displacement rotating body 21 has a displacement base portion 31, a displacement catching portion 32, and a displacement groove portion 33.

The displacement base portion 31 is a cylindrical member such as a cylindrical member, and forms the inner peripheral surface of the displacement rotating body 21. The inner peripheral surface of the displacement base portion 31 and the outer peripheral surface of the input shaft portion 14 face each other. In the facing portion, the input shaft portion 14 is provided with a male screw portion 14a, and the displacement base portion 31 is provided with a female screw portion 31a. The male screw portion 14a and the female screw portion 31a mesh with each other, so that the displacement base portion 31 is screwed onto the input shaft portion 14. Therefore, the displacement rotator 21 rotates relative to the input shaft portion 14 to move relative to the input shaft portion 14 in the axial direction α. For example, when the input shaft portion 14 rotates forward with the displacement rotator 21 not rotating, the displacement rotator 21 moves toward the output shaft portion 15 in the axial direction α. On the other hand, when the input shaft portion 14 reversely rotates while the displacement rotor 21 does not rotate, the displacement rotor 21 moves in the axial direction α in a direction away from the output shaft portion 15.

The displacement catching portion 32 is a convex portion that extends radially outward from the outer peripheral surface of the displacement base portion 31. The displacement catching portion 32 is a portion that is caught by a brake case 61 (see FIG. 1) of the fixed rotating body 22 and the brake device 24 described later. A plurality of displacement catches 32 are arranged at predetermined intervals in the circumferential direction γ. For example, three displacement catching portions 32 are provided at equal intervals in the circumferential direction γ. Each displacement catching portion 32 is provided at the output side end of the displacement base portion 31. Note that only one displacement catching portion 32 may be provided.

The displacement groove 33 is a recess provided on the outer peripheral surface of the displacement base 31. The displacement groove portion 33 extends in a groove shape in the axial direction α. The displacement groove portion 33 extends from the input side end portion of the displacement base portion 31 toward the output side end portion. A plurality of displacement groove portions 33 are arranged in the displacement base portion 31 in the circumferential direction γ at predetermined intervals. For example, two displacement groove portions 33 are provided. The length dimensions of the displacement groove portions 33 are the same in the axial direction α. Note that only one displacement groove 33 may be provided. The displacement groove portion 33 may penetrate the outer peripheral portion of the displacement base portion 31 in the radial direction β.

As shown in FIG. 1, the displacement rotary body 21 enters the inside of the fixed rotary body 22 from the open portion of the fixed rotary body 22 on the input shaft portion 14 side. The fixed rotating body 22 has a first fixing member 40 and a second fixing member 50. The fixing members 40 and 50 are each formed in a tubular shape as a whole, and are fixed to each other by welding or the like.

The first fixing member 40 is a member that is caught by the displacement rotator 21 when the displacement rotator 21 is at the drive position D. The second fixed member 50 is a member that is caught by the displacement rotator 21 when the displacement rotator 21 is in the reverse position R and the parking position P. The fixing members 40 and 50 are arranged in the axial direction α, and the respective center lines of the fixing members 40 and 50 coincide with the rotation axis of the output shaft portion 15. The first fixing member 40 is provided between the output shaft portion 15 and the second fixing member 50 in the axial direction α. The first fixing member 40 is fixed to the input side end of the output shaft portion 15 by welding or the like, and the second fixing member 50 is fixed to the input side end of the first fixing member 40 by welding or the like. ..

As shown in FIGS. 4 and 5, the first fixing member 40 has a first base portion 41, a first catching portion 42, and a first bottom portion 43.

The first base portion 41 is a cylindrical member such as a cylindrical member, and forms the inner peripheral surface of the first fixing member 40. The output side end of the displacement rotating body 21 can enter the inside of the first base portion 41.

The first hook portion 42 is a convex portion that extends radially inward from the inner peripheral surface of the first base portion 41. The first hook portion 42 is a portion hooked on the displacement hook portion 32 of the displacement rotor 21 in the circumferential direction γ. A plurality of the first hook portions 42 are arranged at predetermined intervals in the circumferential direction γ. For example, three first hook portions 42 are provided at equal intervals in the circumferential direction γ.

In the circumferential direction γ, the distance L2 between the adjacent first catches 42 is slightly larger than the length dimension L1 of the displacement catch 32. In this configuration, in a state in which the displacement catching portions 32 are inserted between the adjacent first catching portions 42, the distance between the displacement catching portions 32 and the first catching portions 42 in the circumferential direction γ is as small as possible. In this case, when the input shaft portion 14 starts to rotate, the displacement catching portion 32 comes into contact with the first catching portion 42 at a timing when the rotation speed of the input shaft portion 14 is still low. Therefore, the impact when the displacement catching portion 32 comes into contact with the first catching portion 42 is likely to be small, and it is possible to prevent the catching portions 32 and 42 from being deformed or damaged.

The first bottom portion 43 forms an output side end surface of the first fixing member 40, and is provided between the first base portion 41 and the output shaft portion 15. The first bottom portion 43 forms the bottom surface of the first fixing member 40. The first hook portion 42 extends from the first bottom portion 43 toward the second fixing member 50 in the axial direction α. The first catching portion 42 is separated from the input side end portion and the output side end portion of the first base portion 41 in the axial direction α in the axial direction α from both the input side end portion and the output side end portion. It is provided at the position where

When the displacement rotor 21 is in the drive position D, the displacement catching portion 32 is in a state of being inserted between the first catching portions 42 that are adjacent to each other in the circumferential direction γ. In this case, the output side end of the displacement rotator 21 comes into contact with the first bottom 43, so that the first bottom 43 prevents the displacement rotator 21 from moving beyond the drive position D to the output side.

As shown in FIGS. 6, 7, and 8, the second fixing member 50 has a second base portion 51, a second hook portion 52, and a third hook portion 54.

The second base portion 51 is a cylindrical member such as a cylindrical member, and forms the inner peripheral surface of the second fixing member 50. The output side end of the displacement rotating body 21 can enter the inside of the second base portion 51.

The second hook portion 52 is a convex portion that extends radially inward from the inner peripheral surface of the second base portion 51. The second hook portion 52 is a portion hooked on the displacement hook portion 32 of the displacement rotor 21 in the circumferential direction γ. A plurality of the second hook portions 52 are arranged at predetermined intervals in the circumferential direction γ. For example, six second hook portions 52 are provided at equal intervals in the circumferential direction γ.

In the circumferential direction γ, the distance L3 between the adjacent second catches 52 is slightly larger than the length L1 of the displacement catch 32. In this configuration, in the state in which the displacement catching portions 32 are inserted between the adjacent second catching portions 52, the distance between the displacement catching portions 32 and the second catching portions 52 in the circumferential direction γ is as small as possible. In this case, when the input shaft portion 14 starts rotating, the displacement catching portion 32 comes into contact with the second catching portion 52 at a timing when the rotation speed of the input shaft portion 14 is still low. Therefore, the impact when the displacement catching portion 32 comes into contact with the second catching portion 52 is likely to be small, and deformation or damage of these catching portions 32, 52 is suppressed.

Similar to the second hook portion 52, the third hook portion 54 is a convex portion that extends inward in the radial direction from the inner peripheral surface of the second base portion 51. The third hook portion 54 is a portion hooked on the displacement hook portion 32 of the displacement rotor 21 in the circumferential direction γ. A plurality of the third hook portions 54 are arranged in the circumferential direction γ at predetermined intervals. For example, three third hook portions 54 are provided at equal intervals in the circumferential direction γ.

In the circumferential direction γ, the separation distance L4 between the adjacent third catches 54 is slightly larger than the length dimension L1 of the displacement catch 32. In this configuration, in the state in which the displacement catching portion 32 is inserted between the adjacent third catching portions 54, the distance between the displacement catching portion 32 and the third catching portion 54 in the circumferential direction γ is as small as possible. In this case, when the input shaft portion 14 starts rotating, the displacement catching portion 32 comes into contact with the third catching portion 54 at the timing when the rotation speed of the input shaft portion 14 is still low. Therefore, the impact when the displacement catching portion 32 comes into contact with the third catching portion 54 tends to be small, and it is possible to prevent the catching portions 32 and 54 from being deformed or damaged.

In the fixed rotating body 22, the distance L2 between the adjacent first hook portions 42, the distance L3 between the adjacent second hook portions 52, and the distance L4 between the adjacent third hook portions 54 are the same. There is. Note that these separation distances L2 to L4 may be different from each other.

The third catch 54 is provided on the input side of the second catch 52 in the axial direction α. The third catching portion 54 forms an input side end surface of the second fixing member 50. The second catch 52 extends from the third catch 54 toward the output side in the axial direction α. The second catch 52 is separated from the input side end and the output side end of the second base part 51 in the axial direction α in the axial direction α from both the input side end and the output side end. It is provided at the position where The third hooking portion 54 is bridged over the two second hooking portions 52 that are adjacent to each other in the circumferential direction γ of the plurality of second hooking portions 52. In this case, one third catch 54 is provided for each of the two second catches 52. In addition, the second hook portion 52 does not protrude from the third hook portion 54 in the circumferential direction γ.

When the displacement rotating body 21 is in the reverse position R, the displacement catching portion 32 is inserted between the pair of second catching portions 52 of the plurality of second catching portions 52 over which the third catching portion 54 is bridged. It has become. In this case, the input side end of the displacement rotator 21 comes into contact with the output side end of the third catch 54, whereby the displacement rotator 21 moves to the input side beyond the reverse position R. Blocked by 54.

On the other hand, when the displacement rotating body 21 is at the parking position P, the displacement catching portion 32 is in a state of being inserted between the third catching portions 54 that are adjacent to each other in the circumferential direction γ. Unlike the first fixing member 40, the second fixing member 50 does not have a bottom portion, and the internal space of the second fixing member 50 is open toward both the input side and the output side. When the displacement rotating body 21 is at the parking position P, the displacement rotating body 21 is in a state of protruding toward the input side with respect to the input side end of the second base portion 51.

As shown in FIG. 1, when the displacement rotating body 21 is at the neutral position N, the displacement catching portion 32 has any of the first catching portion 42, the second catching portion 52, and the third catching portion 54 inside the fixed rotating body 22. It doesn't get caught in. In the fixed rotating body 22, the first catching portion 42 and the second catching portion 52 are separated from each other in the axial direction α, and this distance is larger than the length dimension of the displacement catching portion 32 in the axial direction α. There is. Therefore, when the displacement rotor 21 is at the neutral position N, the displacement rotor 21 rotates relative to the fixed rotor 22. In this case, even if the displacement rotor 21 rotates together with the input shaft portion 14, the fixed rotor 22 and the output shaft portion 15 do not rotate. That is, the power transmission device 20 does not transmit power from the input shaft portion 14 to the output shaft portion 15.

As shown in FIGS. 1 and 9, the brake device 24 has a brake case 61, a brake stator 62, a brake rotor 63, a braking portion 64, a bearing portion 65, and an oil seal 66. Each of the brake case 61, the rotor 63, the braking portion 64, the bearing portion 65, and the oil seal 66 is formed in a tubular shape such as a cylindrical shape as a whole, and the respective center lines thereof are aligned with the center line CL of the input shaft portion 14. Match. In FIG. 9, the bearing 65 and the oil seal 66 are not shown.

The brake case 61 accommodates a brake stator 62, a brake rotor 63, a braking portion 64, a bearing portion 65, an oil seal 66 and the like. The brake case 61 is attached to the vehicle body or the vehicle frame by welding or the like. As shown in FIGS. 9 and 10, the brake case 61 has a case hole 61a extending along the center line of the brake case 61, and is formed in a tubular shape such as a cylindrical shape as a whole. The brake case 61 extends along the center line CL of the input shaft portion 14. The center line of the brake case 61 coincides with the center line CL. The diameter of the case hole 61a is larger than the outer diameter of the displacement base portion 31. The input shaft portion 14 and the displacement rotating body 21 are inserted through the case hole 61a.

The brake case 61 is a member that is caught by the displacement rotator 21 when the displacement rotator 21 is in the drive position D. The brake case 61 has a case receiving portion 61b that receives the displacement catching portion 32 of the displacement rotating body 21. The case receiving portion 61b is a recess provided on the output side end surface of the brake case 61. The case receiving portion 61b extends from the output side end surface of the brake case 61 toward the input side, and also extends radially outward from the inner peripheral surface of the brake case 61. A plurality of case receiving portions 61b are arranged at predetermined intervals in the circumferential direction γ. For example, three case receiving portions 61b are provided at equal intervals in the circumferential direction γ. The inner surface of the case receiving portion 61b includes a pair of receiving wall surfaces 61c facing each other in the circumferential direction γ, and a receiving bottom surface 61d facing the output side in the axial direction α. When the displacement catching portion 32 has entered the inside of the case receiving portion 61b, the displacement catching portion 32 is caught on the receiving wall surface 61c in the circumferential direction γ. The brake case 61 forms a receiving wall surface 61c and corresponds to a receiving member.

In the circumferential direction γ, the length dimension L5 of the case receiving portion 61b is slightly larger than the length dimension L1 of the displacement catching portion 32. The length dimension L5 is a distance between the pair of receiving wall surfaces 61c. With this configuration, the distance between the displacement catching portion 32 and the receiving wall surface 61c in the circumferential direction γ is as small as possible when the displacement catching portion 32 is inside the case receiving portion 61b. In this case, when the input shaft portion 14 starts rotating, the displacement catching portion 32 comes into contact with the receiving wall surface 61c at a timing when the rotation speed of the input shaft portion 14 is still low. Therefore, the impact when the displacement catching portion 32 contacts the receiving wall surface 61c is likely to be small, and the displacement catching portion 32 and the brake case 61 are prevented from being deformed or damaged.

The length dimension L5 of the case receiving portion 61b is the same as the separation distances L2 to L4 of the fixed rotating body 22. The length dimension L5 may be different from the distances L2 to L4.

When the displacement rotator 21 is at the parking position P, the displacement catching portion 32 is in the inside of the case receiving portion 61b. In this case, the input bottom end of the displacement rotator 21 contacts the receiving bottom surface 61d of the brake case 61, so that the receiving bottom surface 61d prevents the displacement rotator 21 from moving toward the input side from the parking position P. ..

In FIG. 9, the brake stator 62 is fixed to the brake case 61. The brake stator 62 can also be called a stator. The brake stator 62 has a coil as a stator winding. The coil is connected to the power supply unit, and generates a magnetic field by being energized as AC power is supplied from the power supply unit. The brake stator 62 may have a core such as an iron core around which a coil is wound.

As shown in FIG. 9, the brake rotor 63 is provided inside the brake stator 62 and is rotatable about the center line of the brake stator 62. The brake rotor 63 is attached to the displacement rotator 21 in such a state that it can both move relative to the displacement rotator 21 in the axial direction α and rotate together with the displacement rotator 21. The brake rotor 63 is provided on the outer peripheral side of the displacement rotating body 21 as a whole, and is coaxial with the displacement rotating body 21.

As shown in FIG. 11, the brake rotor 63 has a rotor base portion 63a, an outer protruding portion 63b, and an inner protruding portion 63c. The rotor base portion 63a is formed in a cylindrical shape. The rotor base portion 63 a is provided on the outer peripheral side of the displacement base portion 31 and extends along the outer peripheral surface of the displacement base portion 31. The rotor base portion 63a is provided coaxially with the displacement base portion 31. In this case, the displacement base portion 31 is inserted into the rotor base portion 63a.

The outer protruding portion 63b is a protruding portion that extends radially outward from the outer peripheral surface of the rotor base portion 63a. The outer protruding portion 63b is an annular plate portion such as an annular shape. The outer protruding portion 63b is located between the input end and the output end of the rotor base 63a in the axial direction α, and is spaced apart from the input end and the output end in the axial direction α. It is provided in. Only one outer protruding portion 63b is provided for the rotor base portion 63a. Note that a plurality of outer protruding portions 63b may be provided on the rotor base portion 63a. For example, the plurality of outer protruding portions 63b may be arranged in the circumferential direction γ, or may be arranged in the axial direction α. The outer protruding portion 63b does not have to be annular.

The inner protruding portion 63c is a protruding portion that extends radially inward from the inner peripheral surface of the rotor base portion 63a. The inner protruding portion 63c is a portion that can be inserted into the displacement groove portion 33 of the displacement rotor 21, and is a portion that is caught in the displacement groove portion 33 in the circumferential direction γ in a state of entering the inside of the displacement groove portion 33. A plurality of the inner protruding portions 63c are arranged in the circumferential direction γ at predetermined intervals. For example, two inner protrusions 63c are provided at equal intervals in the circumferential direction γ. Each inner protruding portion 63c extends in an elongated shape in the axial direction α. In the axial direction α, the length dimension of the inner protruding portion 63c is smaller than the length dimension of the displacement groove portion 33. Therefore, the inner protrusion 63c is movable in the axial direction α relative to the displacement groove 33 in a state where the inner protrusion 63c is inside the displacement groove 33. The inner protruding portion 63c extends in a spline shape, and the inner protruding portion 63c can also be referred to as a spline.

As shown in FIGS. 1 and 9, the braking unit 64 has a magneto-rheological fluid (Magneto Rheological Fluid) and an accommodating unit that accommodates the magnetorheological fluid. The magnetorheological fluid is a fluid whose apparent viscosity changes according to the applied magnetic amount, and the magnetorheological fluid can also be referred to as MRF. The brake device 24 is an MRF brake capable of restricting the rotation of the brake rotor 63 using a magnetic viscous fluid. The braking portion 64 is provided between the brake stator 62 and the brake rotor 63 in the radial direction β. The outer protruding portion 63b of the brake rotor 63 is inserted inside the braking portion 64, and the magnetorheological fluid can apply the brake torque to the outer protruding portion 63b. In the brake device 24, the amount of electricity supplied to the brake stator 62 increases or decreases, whereby the brake torque applied to the outer protruding portion 63b from the magnetorheological fluid increases or decreases.

Regarding the brake device 24, a state in which the braking portion 64 regulates the rotation of the brake rotor 63 is called a braking state, and a state in which the braking portion 64 does not regulate the rotation of the brake rotor 63 is called a braking release state. The braking state is a state in which the braking torque of the braking unit 64 is large enough to restrict the rotation of the brake rotor 63. The braking release state is a state in which the braking torque of the braking unit 64 does not regulate the rotation of the brake rotor 63. As described above, since the inner protruding portion 63c of the brake rotor 63 is caught in the displacement groove portion 33 of the displacement rotary body 21, when the brake device 24 is in the braking state, the rotation of the displacement rotary body 21 is also braked.

The bearing portion 65 is attached to the brake case 61 and rotatably supports the brake stator 62. The bearing portion 65 is provided at each of the input side end portion and the output side end portion with respect to the brake case 61. These bearing portions 65 are separated from each other in the axial direction α. The oil seal 66 seals a gap between members so that oil such as lubricating oil does not leak out of the brake device 24. The oil seal 66 is provided between the bearing portion 65 and the braking portion 64 in the axial direction α. Note that the bearing portion 65 may be provided between the braking portion 64 and the oil seal 66 in the axial direction α.

In the drive system 10, the displacement rotor 21 is screwed onto the input shaft portion 14 as described above. Therefore, when the rotation speed of the displacement rotary body 21 per unit time becomes smaller than the rotation speed of the input shaft portion 14 by braking the rotation of the displacement rotary body 21 by the brake device 24, the rotational movement of the input shaft portion 14 is reduced. , The displacement rotator 21 is converted into a translational motion that translates in the axial direction α. This translational motion corresponds to a linear motion in which the displacement rotating body 21 moves straight in the axial direction α. In the power transmission device 20, the female screw portion 31 a of the displacement rotating body 21 and the brake device 24 constitute a motion converting portion that converts the rotational movement of the input shaft portion 14 into the linear movement of the displacement rotating body 21. From the viewpoint of the drive system 10, in addition to the female screw portion 31a of the displacement rotor 21 and the brake device 24, the male screw portion 14a of the input shaft portion 14 constitutes a motion converting portion.

When the rotation of the displacement rotary body 21 is restricted by the brake device 24 shifting to the braking state, the rotational movement of the input shaft portion 14 is forcibly converted into the translational movement of the displacement rotary body 21. On the other hand, when the brake device 24 is in the braking release state, the rotation of the displacement rotary body 21 is not braked, and the rotational movement of the input shaft portion 14 is not converted into the translational movement of the displacement rotary body 21. The braking state of the brake device 24 corresponds to the conversion forced state in which the motion conversion unit forces the motion conversion, and the braking release state corresponds to the conversion release state in which the motion conversion unit's force conversion force is released. Further, the brake device 24 corresponds to the conversion forcing unit.

When the displacement rotor 21 is in any of the drive position D, the reverse position R, and the neutral position N, and the brake device 24 is in the braking release state, the brake stator 62 and the displacement rotor 21 rotate together with the input shaft portion 14. .. In this case, the brake device 24 does not regulate the rotation of the brake stator 62, and thus does not regulate the rotation of the displacement rotor 21. On the other hand, when the brake device 24 is in the braking state, the rotation of the brake stator 62 is delayed with respect to the input shaft portion 14 along with the rotation of the displacement rotor 21. In this case, the brake device 24 restricts the rotation of the displacement rotor 21 by restricting the rotation of the brake stator 62. The displacement rotating body 21 corresponds to a main rotating body, and the brake stator 62 corresponds to a driven rotating body that rotates according to the main rotating body.

The positions N, D, R, P to which the displacement rotator 21 can move are arranged in order of the drive position D, the neutral position N, the reverse position R, and the parking position P from the input side toward the output side. As described above, the neutral position N is arranged between the drive position D and the reverse position R in the axial direction α. To move the displacement rotor 21 to any of the drive position D, the reverse position R, and the parking position P, it is necessary to pass through the neutral position N. When moving from the reverse position R to the parking position P, the displacement rotor 21 moves from the reverse position R toward the output side and reaches the neutral position N, and then moves from the neutral position N to the input side. The parking position P is reached. On the other hand, when the drive position D moves to the reverse position R, the drive position D moves toward the output side to reach the reverse position R through the neutral position N.

Here, the relationship between the position of the displacement rotor 21 and the rotation direction of the input shaft portion 14 will be described with reference to FIGS. 12 to 22. 15 to 22, the drive motor 11, the transmission 12, and the ECU 70 are not shown.

When the input shaft 14 rotates relative to the displacement rotor 21 due to the braking device 24 being in the braking state, the displacement rotor 21 moves toward the output side when the input shaft 14 rotates forward. .. On the other hand, in this case, when the input shaft portion 14 rotates in the reverse direction, the displacement rotor 21 moves toward the input side. Therefore, as shown in FIG. 15, when the brake device 24 is in the braking state and the input shaft portion 14 rotates forward, the displacement rotor 21 can move from the neutral position N to the drive position D as shown in FIG. It has become. Further, as shown in FIG. 18, when the brake device 24 is in the braking state and the input shaft portion 14 rotates in the reverse direction, the displacement rotor 21 moves from the neutral position N to the reverse position R as shown in FIGS. Alternatively, it can be moved to the parking position P.

As shown in FIG. 12, when the displacement rotating body 21 is at the drive position D, the displacement catching portion 32 is inserted between the first catching portions 42 adjacent to each other in the circumferential direction γ. The angle of the displacement rotating body 21 in this case is called a drive angle. For example, a reference angle is set for the displacement rotator 21, and the difference between the reference angle and the actual angle of the displacement rotator 21 is the drive angle. If the reference angle and the actual angle of the displacement rotor 21 are the same, the drive angle is zero degrees. Further, in this case, as shown in FIGS. 16 and 17, the output side end surface of the displacement rotary body 21 can come into contact with the first bottom portion 43 of the fixed rotary body 22.

As shown in FIG. 13, when the displacement rotating body 21 is in the reverse position R, the displacement catching portion 32 is located between the two second catching portions 52 that are adjacent to each other in the circumferential direction γ and have the third catching portion 54 bridged thereto. Has entered. The angle of the displacement rotating body 21 in this case is called a reverse angle. For example, the reverse angle is set to the same zero degree as the drive angle. Further, in this case, as shown in FIGS. 19 and 20, the input side end surface of the displacement rotating body 21 can come into contact with the output side end surface of the third hook portion 54 of the fixed rotating body 22.

In the fixed rotating body 22, the first hooking portion 42 and the second hooking portion 52 are provided at positions overlapping in the axial direction α. In other words, the space between the first catch portions 42 adjacent to each other in the circumferential direction γ and the space between the second catch portions 52 adjacent to each other in the circumferential direction γ are arranged in the axial direction α. This indicates that the drive angle and the reverse angle have the same value. Therefore, the displacement rotator 21 can reach the reverse position R through the neutral position N by directly moving to the input side from the drive position D without rotating.

As shown in FIG. 14, when the displacement rotating body 21 is at the parking position P, the displacement catching portion 32 is inserted between the third catching portions 54 adjacent to each other in the circumferential direction γ. The angle of the displacement rotating body 21 in this case is called a parking angle. For example, the parking angle is set to 60 degrees with respect to the reference angle. Further, in this case, as shown in FIG. 22, the output side end of the displacement rotary body 21 can come into contact with the receiving bottom surface 61d of the brake case 61.

The third hook portion 54 is provided at a position displaced in the circumferential direction γ with respect to the first hook portion 42 and the second hook portion 52. In other words, the space between the first catch portions 42 adjacent to each other in the circumferential direction γ and the space between the second catch portions 52 adjacent to each other in the circumferential direction γ are in the axial direction α with respect to the third catch portion 54. It is lined up. That is, for the displacement rotating body 21, the parking angle is different from the drive angle and the reverse angle. Therefore, the displacement rotator 21 rotates from the drive angle or the reverse angle to the parking angle at the neutral position N after reaching the neutral position N from the drive position D or the reverse position R. Then, the displacement rotator 21 reaches the neutral position N by moving toward the input side in this state at the neutral angle.

In the drive system 10, the input shaft portion 14, the output shaft portion 15, and the fixed rotating body 22 are provided in a state where they are not displaced in the axial direction α. Therefore, even if the displacement rotator 21 is simply screwed into the input shaft portion 14, it is necessary to prevent the displacement rotator 21 from moving in the axial direction α as the input shaft portion 14 starts rotating. The displacement rotor 21 starts rotating together with the input shaft portion 14. In other words, if the displacement rotary body 21 is not restricted from moving in the axial direction α, a difference may occur between the rotation of the input shaft portion 14 and the rotation of the displacement rotary body 21. For example, when the rotation of the input shaft portion 14 is started, the displacement rotor 21 may start rotating at a lower rotation speed than the input shaft portion 14. The relationship between the rotation direction of the input shaft portion 14 and the traveling direction of the displacement rotating body 21 is defined by the screwing direction of the male screw portion 14a and the female screw portion 31a.

As shown in FIGS. 12 and 17, when the displacement rotor 21 is in the drive position D and the brake device 24 is in the braking release state, when the input shaft portion 14 rotates forward, the input shaft portion 14 moves. It will rotate in the direction in which 21 is moved to the output side. In this case, the output-side end surface of the displacement rotator 21 is pressed against the first bottom portion 43 of the fixed rotator 22, and translational movement of the displacement rotator 21 toward the output side is restricted. As a result, the displacement rotary body 21 rotates forward together with the input shaft portion 14, and the fixed rotary body 22 and the output shaft portion 15 rotate forward together with the displacement rotor 21. The first bottom portion 43 corresponds to the straight-movement restricting portion, and restricts the straight-moving motion of the displacement rotary body 21 from the drive position D.

As shown in FIGS. 13 and 20, when the displacement rotary body 21 is in the reverse position R and the brake device 24 is in the braking release state, when the input shaft portion 14 rotates in the reverse direction, the input shaft portion 14 is displaced. It will rotate in the direction to move 21 to the input side. In this case, the input-side end surface of the displacement rotor 21 is pressed against the output-side end surface of the third hook portion 54 of the fixed rotor 22, and the displacement rotor 21 is restricted from translational movement toward the input side. As a result, the displacement rotor 21 reversely rotates with the input shaft portion 14, and the fixed rotor 22 and the output shaft portion 15 reversely rotate with the displacement rotor 21. The third catching portion 54 corresponds to a straight-movement restricting portion and restricts the straight-moving movement of the displacement rotary body 21 from the reverse position R.

As shown in FIGS. 14 and 21, when the displacement rotor 21 is at the parking position P and the brake device 24 is in the braking release state, when the input shaft portion 14 tries to rotate in the reverse direction, the input shaft portion 14 is displaced. The rotating body 21 tends to rotate in the direction in which it is moved to the input side. In this case, the input side end surface of the displacement rotator 21 is pressed against the receiving bottom surface 61d of the brake case 61, and translational movement of the displacement rotator 21 toward the input side is restricted. Further, in this case, the displacement catching portion 32 of the displacement rotating body 21 is caught by the receiving wall surface 61c of the brake case 61, and the displacement rotating body 21 is restricted from rotating in the reverse direction. As a result, reverse rotation of the input shaft portion 14 is restricted by the case receiving portion 61b of the brake case 61. The receiving wall surface 61c of the brake case 61 corresponds to a straight-travel restricting portion, and restricts the straight-moving motion of the displacement rotary body 21 from the parking position P.

Returning to the description of FIG. 1, the ECU 70 is a control device that controls the operation of the drive system 10. The ECU 70 is electrically connected to the drive motor 11, the transmission 12, and the brake device 24. The ECU 70 controls the operation of the drive motor 11, the transmission 12, and the brake device 24 by outputting a command signal. Various sensors such as a shift sensor that detects the operation mode of the shift lever are electrically connected to the ECU 70, and detection signals of these sensors are input. The ECU 70 performs a range switching process for switching the shift range of the power transmission device 20, targeting the drive system 10. The range switching process is a cooperative control process for the ECU 70 to coordinate and adjust the drive motor 11 and the brake device 24.

The ECU 70 is a "control device" such as an electronic control unit. The "control device" is also called a computer or a microcomputer. The "control device" provides a control system for controlling a controlled object. At least one function in this specification is provided by at least one "controller" configured to provide the function. The “control device” includes at least hardware. The “control device” may include software recorded in a storage medium. The "controller" may be provided solely by hardware. The "controller" is provided by a plurality of logics called if-then-else form, or a trained model tuned by machine learning, such as a neural network.

At least one function herein is provided by at least one "controller". A "controller" may include multiple "controllers" linked by a data communication device. The “control device” includes (1) a case where the hardware achieves the above function by executing software, (2) a case where the hardware achieves the above function, and (3) the above (1) part. Including the case where the above function is achieved by the combination with the part (2).

The control unit and the method described in this disclosure may be realized by (1) a dedicated computer that constitutes a processor programmed to execute one or more functions embodied by a computer program. .. Alternatively, the control unit and the method described in this disclosure may be realized by (2) a dedicated hardware logic circuit. Alternatively, the control unit and the method described in this disclosure are realized by (3) one or more dedicated computers configured by a combination of a processor that executes a computer program and one or more hardware logic circuits. Good. Further, the computer program may be stored in a computer-readable non-transition tangible recording medium as an instruction executed by a computer.

An example of the “control device” is a computer including at least a memory that stores a program and at least one processor that executes the program. In this case, the computer includes at least one processor core called CPU: Central Processing Unit, GPU: Graphics Processing Unit, or the like. The memory is also called a storage medium. A memory is a non-transitional and tangible storage medium that stores "programs and/or data" readable by a processor in a non-transitory manner. The storage medium is provided by a semiconductor memory, a magnetic disk, an optical disk, or the like. The program may be distributed by itself or as a storage medium storing the program.

One example of a "controller" is a computer that includes digital or analog circuits that include multiple logic units. In this case, the computer is called a logic circuit array, for example, ASIC: Application-Specific Integrated Circuit, FPGA: Field Programmable Gate Array, PGA: Programmable Gate Array, CPLD: Complex Programmable Logic Device. The digital circuit may include a memory that stores “programs and/or data”.

The term "hardware processor" means (1) a processor core that reads and executes a computer program, (2) a logic circuit array including an ASIC, an FPGA, or (3) a combination of (1) and (2) above. Including.

The “control device”, the signal source, and the controlled object provide various elements. At least some of those elements may be referred to as blocks for performing functions. In another respect, at least some of those elements can be referred to as modules, or sections, that are interpreted as a configuration. Furthermore, the elements included in the control system can also be called means for realizing their functions only when they are intentional.

Next, the range switching process performed by the ECU 70 will be described with reference to the flowchart in FIG. The ECU 70 repeatedly executes the range switching process at predetermined intervals.

12, in step S101, it is determined whether or not the shift range of the power transmission device 20 is switched. Here, using various signals input to the ECU 70, it is determined whether or not the shift position of the shift lever is changed, it is determined that the shift range is switched when the shift position is changed, and the shift position is changed. If not, it is determined not to switch the shift range.

When changing the shift position, the process proceeds to step S102, and the shift range is switched to the neutral range. Here, the displacement rotor 21 is moved to the neutral position N by performing cooperative control of the drive motor 11 and the brake device 24. For example, when the displacement rotator 21 is in the drive position D, the drive motor 11 is reversely rotated and the brake device 24 is shifted to the braking state, and the displacement rotator 21 is moved from the drive position D to the neutral position N. When the displacement rotator 21 is at the reverse position R or the parking position P, the drive motor 11 is normally rotated and the brake device 24 is brought into the braking state, and the displacement rotator 21 is moved to the reverse position R or the parking position P. To the neutral position N from. In either case, the brake device 24 is brought from the braking state to the braking release state in accordance with the displacement rotary body 21 reaching the neutral position N. This prevents the displacement rotator 21 from unintentionally moving from the neutral position N to the reverse position R, the drive position D, or the parking position P.

In step S103, it is determined whether or not the shift range is switched to the drive range. Here, it is determined whether or not the shift position of the shift lever is changed to the position corresponding to the drive range, and it is determined that the shift range is switched to the drive range when the shift position is changed to the position corresponding to the drive range. ..

When switching to the drive range, the process proceeds to step S104, and the displacement rotor 21 is set to the drive angle. Here, the drive motor 11 is driven to rotate the input shaft portion 14 together with the displacement rotator 21 so that the angle of the displacement rotator 21 becomes the drive angle while the braking device 24 is kept in the braking release state.

In step S105, the displacement rotating body 21 is held at the drive angle. Here, when the displacement rotor 21 rotates and reaches the drive angle, the brake device 24 is shifted from the braking release state to the braking state.

In step S106, the displacement rotating body 21 is moved to the drive position D. Here, with the brake device 24 kept in a braking state, the drive motor 11 is driven to rotate the input shaft portion 14 forward, and the displacement rotor 21 is moved from the neutral position N toward the output side to drive the drive position. Reach D.

In step S107, the holding of the angle of the displacement rotor 21 that has reached the drive position D is released. Here, when the displacement rotator 21 reaches the drive position D, the brake device 24 shifts from the braking state to the braking release state. In this case, the input shaft portion 14 rotates forward with the driving of the drive motor 11, so that the fixed rotating body 22 and the output shaft portion 15 rotate forward together with the displacement rotating body 21.

If the drive range is not switched, the process proceeds to step S108, and it is determined whether or not the shift range is switched to the reverse range. Here, it is determined whether or not the shift position of the shift lever is changed to a position corresponding to the reverse range, and it is determined that the shift range is switched to the reverse range when the shift position is changed to a position corresponding to the reverse range. ..

When switching to the reverse range, the process proceeds to step S109, and the displacement rotator 21 is set to the reverse angle. Here, the drive motor 11 is driven to rotate the input shaft portion 14 together with the displacement rotator 21 so that the angle of the displacement rotator 21 becomes the reverse angle while the brake device 24 is kept in the braking release state.

In step S110, the displacement rotating body 21 is held at the reverse angle. Here, when the displacement rotator 21 rotates and reaches the reverse angle, the brake device 24 is shifted from the braking release state to the braking state.

In step S111, the displacement rotating body 21 is moved to the reverse position R. Here, with the brake device 24 kept in the braking state, the drive motor 11 is driven to rotate the input shaft portion 14 forward, and the displacement rotor 21 is moved from the neutral position N toward the output side to the reverse position. Reach R.

In step S112, the angle holding of the displacement rotating body 21 that has reached the reverse position R is released. Here, when the displacement rotator 21 reaches the reverse position R, the brake device 24 shifts from the braking state to the braking release state. In this case, the input shaft portion 14 rotates in reverse with the drive of the drive motor 11, so that the fixed rotating body 22 and the output shaft portion 15 rotate in reverse together with the displacement rotating body 21.

If the drive range and the reverse range are not switched, the process proceeds to step S113, and it is determined whether or not the shift range is switched to the parking range. Here, it is determined whether or not the shift position of the shift lever is changed to the position corresponding to the parking range, and it is determined that the shift range is switched to the parking range when the shift position is changed to the position corresponding to the parking range. ..

When switching to the parking range, the process proceeds to step S114, and the displacement rotator 21 is set to the parking angle. Here, the drive motor 11 is driven to rotate the input shaft portion 14 together with the displacement rotator 21 so that the angle of the displacement rotator 21 becomes the parking angle while the brake device 24 is kept in the braking release state.

In step S115, the displacement rotating body 21 is held at the parking angle. Here, when the displacement rotator 21 rotates and reaches the parking angle, the brake device 24 is shifted from the braking release state to the braking state.

In step S116, the displacement rotating body 21 is moved to the parking position P. Here, with the brake device 24 kept in the braking state, the drive motor 11 is driven to rotate the input shaft portion 14 forward, and the displacement rotor 21 is moved from the neutral position N toward the output side to move to the parking position. Reach P.

In step S117, the angle holding of the displacement rotary body 21 that has reached the parking position P is released. Here, when the displacement rotating body 21 reaches the parking position P, the brake device 24 shifts from the braking state to the braking release state. In this case, the unintentional rotation of the input shaft portion 14 is restricted by the displacement rotor 21 being caught by the brake case 61.

When the angle of the displacement rotator 21 reaches the drive angle, the reverse angle, or the parking angle, the brake device 24 may be shifted to the braking state after the drive motor 11 is stopped, and the drive motor 11 is not stopped. Alternatively, the braking device 24 may be shifted to the braking state. Further, when the displacement rotating body 21 reaches the drive position D, the reverse position R, or the parking position P, the brake device 24 may be shifted to the braking release state after stopping the drive motor 11. Further, the brake device 24 may be shifted to the braking release state without stopping the drive motor 11.

According to the present embodiment described thus far, when the displacement rotor 21 is in the drive position D and the reverse position R, the displacement rotor 21 is caught by the fixed rotor 22, so that the power of the drive motor 11 causes the input shaft portion to move. The output shaft portion 15 rotates together with 14. On the other hand, when the displacement rotator 21 is in the parking position P, the displacement rotator 21 is caught by the case receiving portion 61b of the brake case 61, so that the input shaft portion 14 does not rotate, and the output shaft portion 15 also rotates accordingly. do not do. Therefore, by simply moving the displacement rotator 21 to the drive position D, the reverse position R, and the parking position P, the power transmission device 20 can be switched between a state where the output shaft portion 15 rotates and a state where the output shaft portion 15 does not rotate.

Moreover, the displacement rotating body 21 is coaxial with the input shaft portion 14 at any of the drive position D, the reverse position R, and the parking position P. Therefore, the configuration in which the displacement rotating body 21 is caught on the output shaft portion 15 and the configuration in which the displacement rotating body 21 is caught in the case receiving portion 61b of the brake case 61 are separated from the input shaft portion 14 and the output shaft portion 15 in the radial direction β. It is not necessary to place it in the specified position. Therefore, in the power transmission device 20, the power transmission mode from the input shaft portion 14 to the output shaft portion 15 can be switched, and the power transmission device 20 can be downsized.

According to the present embodiment, when the displacement rotating body 21 is at the parking position P, the displacement catching portion 32 is caught by the fixed rotating body 22 in addition to the case receiving portion 61b of the brake case 61. In this case, the displacement rotator 21 regulates both the rotation of the input shaft portion 14 and the rotation of the output shaft portion 15. Therefore, when the shift range of the power transmission device 20 is in the parking range, it is possible to prevent the output shaft portion 15 and the axle from unintentionally rotating even though the drive motor 11 is not driven. ..

According to the present embodiment, the displacement rotating body 21 moves in the axial direction α relative to the input shaft portion 14 to be displaced into the drive position D, the reverse position R, and the parking position P. In this configuration, since the displacement rotating body 21 is provided coaxially with the input shaft portion 14, it is possible to easily realize the configuration in which the displacement rotating body 21 moves along the input shaft portion 14 in the axial direction α. Therefore, it is possible to prevent the configuration in which the displacement rotating body 21 can be displaced to the drive position D, the reverse position R, and the parking position P from becoming complicated.

According to the present embodiment, the rotational movement of the input shaft portion 14 is performed by the female screw portion 31a of the displacement rotating body 21 that meshes with the male screw portion 14a of the input shaft portion 14 and the brake device 24 that restricts the rotation of the displacement rotating body 21. A motion conversion unit configured to convert the displacement rotation body 21 into the translational movement of the displacement rotation body 21 is configured. In this configuration, the displacement rotating body 21 can move to the drive position D, the reverse position R, and the parking position P by translational movement. Therefore, the displacement rotor 21 is translated into the drive position D, the reverse position R, and the parking position P by translating the displacement rotor 21 using the power of the drive motor 11 for rotating the input shaft portion 14. Can be moved to. In this case, since it is not necessary to provide the power transmission device 20 with a dedicated power source such as a dedicated motor for moving the displacement rotating body 21, the power transmission device 20 can be downsized.

According to the present embodiment, the first bottom portion 43, the third catching portion 54, and the receiving bottom surface 61d of the brake case 61 are used as the rectilinear movement restricting portion that restricts the translational movement of the displacement rotating body 21 by contacting the displacement rotating body 21. The displacement rotary bodies 21 are provided side by side in the axial direction α. Therefore, when the displacement rotary body 21 reaches the desired position, the displacement rotary body 21 can be prevented from passing through the desired position by the first bottom portion 43, the third catch portion 54, and the receiving bottom surface 61d. Specifically, the displacement bottom 21 can be prevented from moving to the output side with respect to the drive position D by the first bottom portion 43. Further, the displacement rotating body 21 can be prevented from moving to the input side with respect to the reverse position R and the parking position P by the third catch portion 54 and the receiving bottom surface 61d.

Moreover, since a part of the fixed rotary body 22 is used as a portion for restricting the translational motion of the displacement rotary body 21, it is not necessary to provide a dedicated member for restricting the translational motion of the displacement rotary body 21. Therefore, it is possible to prevent the power transmission device 20 from increasing in size in order to realize a configuration capable of restricting the translational movement of the displacement rotating body 21.

According to this embodiment, when the brake device 24 is in the braking state, the rotational movement of the input shaft portion 14 is forcibly converted into the translational movement of the displacement rotor 21. On the other hand, when the brake device 24 is in the braking release state, the displacement rotor 21 rotates together with the input shaft portion 14, and therefore the rotational movement of the input shaft portion 14 is not converted into the translational movement of the displacement rotor 21. As described above, the brake device 24 only needs to have a function of switching the motion of the displacement rotary body 21 between the rotary motion and the translational motion, so that the power consumption of the brake device 24 can be reduced. Therefore, the brake device 24 can be downsized, and as a result, the power transmission device 20 can be downsized.

According to this embodiment, the brake device 24 restricts the rotation of the displacement rotary body 21, so that the input shaft portion 14 rotates relatively to the displacement rotary body 21 and the displacement rotary body 21 moves in the axial direction α. Translate. Therefore, if the brake device 24 has a function of restricting the rotation of the displacement rotor 21, the motion of the displacement rotor 21 can be switched between rotational motion and translational motion. Therefore, the power consumption of the brake device 24 can be further reduced.

According to this embodiment, in the brake device 24, the rotation of the displacement rotor 21 is regulated by regulating the rotation of the brake rotor 63 that rotates together with the displacement rotor 21. In this configuration, even if the outer shape and outer diameter of the input shaft portion 14 are changed, the inner shape and inner diameter of the displacement rotor 21 must be changed, while the outer shape and outer diameter of the displacement rotor 21 must be changed. It is not necessary to change the shape or size of the brake rotor 63. That is, in the drive system 10, when the brake device 24 is used for a plurality of products, if the shape of the displacement rotating body 21 is applied to the input shaft portion 14 for each product, the specifications of the brake device 24 need to be changed. Absent. In this way, the versatility of the brake device 24 can be enhanced.

According to this embodiment, the displacement rotator 21 moves to the parking position P when the shift range of the vehicle is switched to the parking range, and moves to the drive position D when the shift range is switched to the drive range. Further, the shift range is switched to the reverse range to move to the reverse position R. With this configuration, the traveling mode of the vehicle can be switched by simply moving the displacement rotating body 21 provided coaxially with the input shaft portion 14.

According to the present embodiment, when the displacement rotary body 21 is in the neutral position N, the displacement rotary body 21 is not caught by either the fixed rotary body 22 or the brake case 61. In this case, the input shaft 14 can be rotated by the power of the drive motor 11, but the output shaft 15 does not rotate due to the rotation of the input shaft 14. Therefore, by simply moving the displacement rotating body 21 to the neutral position N, the power transmission device 20 can be shifted to a state in which power is not transmitted from the input shaft portion 14 to the output shaft portion 15.

(Second embodiment)
In the first embodiment, the brake device 24 indirectly regulates the rotation of the displacement rotor 21 by regulating the rotation of the brake rotor 63, but in the second embodiment, the brake device 24 is displaced and displaced. The rotation of the body 21 is directly regulated. In this embodiment, differences from the first embodiment will be mainly described.

As shown in FIG. 23, the brake device 24 has a brake member 81 and a brake drive unit 82 instead of the brake stator 62, the brake rotor 63, the braking unit 64 and the bearing unit 65 of the first embodiment. .. The brake member 81 and the drive unit 82 are housed in the brake case 61. The brake members 81 are provided side by side on the displacement rotary body 21 in the radial direction β and are movable in the radial direction β. The brake member 81 is movable to a catching position where it is caught in the displacement groove portion 33 of the displacement rotor 21 and a catching release position where it is not caught in the displacement groove portion 33. When the brake member 81 is in the hooked position, the rotation of the displacement rotor 21 is restricted by the brake member 81. On the other hand, when the brake member 81 is in the catch release position, the rotation of the displacement rotor 21 is not restricted by the brake member 81.

The brake member 81 has a brake catching portion 81a and a brake extending portion 81b. The brake catching portion 81a is an elongated portion extending in the axial direction α, and has a shape and a size capable of entering the inside of the displacement groove portion 33. The brake extension portion 81b extends radially outward from the brake catching portion 81a. When the brake member 81 is in the catching position, the brake catching portion 81a is in a state of being inside the displacement groove 33. On the other hand, when the brake member 81 is in the catch releasing position, the brake catching portion 81 a does not enter the inside of the displacement groove 33.

The brake drive unit 82 is an electric motor or the like, and can be driven to move the brake member 81 between the hooked position and the hook released position. The brake device 24 has a position holding portion that holds the position of the brake member 81. The position holding unit urges the brake member 81 toward, for example, the catch releasing position, and the brake drive unit 82 moves the brake member 81 to the catching position against the biasing force of the position holding unit.

(Other embodiments)
Although a plurality of embodiments according to the present disclosure have been described above, the present disclosure should not be construed as being limited to the above embodiments and applied to various embodiments and combinations without departing from the gist of the present disclosure. can do.

As a first modification, regarding the drive angle, the reverse angle, and the parking angle, the drive angle and the reverse angle may be different angles, and the drive angle and the parking angle may be the same angle. In short, the drive angle, reverse angle, and parking angle may be set arbitrarily. In other words, in the fixed rotating body 22, the first hook portion 42 and the second hook portion 52 do not have to overlap in the axial direction α, and the first hook portion 42 and the third hook portion 54 are in the axial direction. It may be provided so as to overlap with α.

As a second modification, with respect to the position of the displacement rotary body 21, a neutral position N may be set between the reverse position R and the parking position P, and the drive position D is sandwiched between the neutral position N and the neutral position N. The position P may be set. In short, the drive position D, the reverse position R, the neutral position N, and the parking position P may be arranged in any order in the axial direction α.

As a third modification, the number of displacement catches 32 of the displacement rotor 21 is different from the number of first catches 42, the number of second catches 52, and the number of third catches 54 of the fixed rotor 22. May be. In addition, the distance L2 between the adjacent first catches 42, the distance L3 between the adjacent second catches 52, and the distance L4 between the adjacent third catches 54 are larger than the length L1 of the displacement catch 32. It may be clearly larger.

As a fourth modification, the fixed rotating body 22 may be formed not by combining two members of the first fixing member 40 and the second fixing member 50, but by one member. Further, it may be formed by combining three or more members.

As a fifth modification, the fixed rotating body 22 may be formed not by a separate member attached to the output shaft portion 15 but by a part of the output shaft portion 15. That is, the output shaft portion 15 may have the fixed rotating body 22. In both the configuration in which the output shaft portion 15 and the fixed rotating body 22 are separate members, and the configuration in which the output shaft portion 15 includes the fixed rotating body 22, the displacement rotating body 21 serves as the output shaft portion 15. A catching structure is realized.

As a sixth modification, the fixed rotary body 22 may be configured to enter the inside of the displacement rotary body 21. In this case, for example, in the displacement rotating body 21, the displacement catching portion 32 protrudes radially inward from the inner peripheral surface of the displacement base portion 31. On the other hand, in the fixed rotating body 22, the first hooking portion 42 projects radially outward from the first base portion 41. Moreover, the 2nd catching part 52 and the 3rd catching part 54 are protruding toward the radial direction outer side from the 2nd base part 51.

As a modified example 7, in the brake case 61, the case receiving portion 61b on which the displacement catching portion 32 of the displacement rotating body 21 is caught may be a convex portion instead of a concave portion. In short, it is sufficient if the case catching portion 61b realizes the configuration in which the displacement catching portion 32 is caught by a part of the brake case 61.

As a modified example 8, the receiving member on which the displacement rotating body 21 is hooked may be a part of the vehicle body or a part of the vehicle frame instead of the brake case 61.

As a ninth modification, if the brake rotor 63 is hooked on the displacement rotor 21 in the circumferential direction γ, the inner protrusion 63c of the brake rotor 63 is in the displacement groove 33 of the displacement rotor 21. You don't have to. For example, the convex portion provided on the displacement rotating body 21 may be configured to enter the inside of the concave portion provided on the brake rotor 63. In short, it is sufficient that the brake rotor 63 can both move relative to the displacement rotary body 21 in the axial direction α and rotate together with the displacement rotary body 21.

As a tenth modification, as the braking system of the braking device 24, a friction brake, a magnetic brake, a powder brake, or a functional fluid brake may be used instead of or in addition to the MRF brake. Whichever braking method is used, in the braking device 24, it is sufficient that the braking portion 64 can regulate the rotation of the brake rotor 63.

As a modified example 11, the connection between the input shaft portion 14 and the output shaft portion 15 may be released when the displacement rotating body 21 is at the parking position P as the rotation restricting position. For example, when the displacement rotator 21 is at the parking position P, the displacement catching portion 32 is not caught by both the third catching portion 54 and the case receiving portion 61b, but is caught by the case receiving portion 61b while the third catching portion 61b is caught. The part 54 does not catch. In this configuration, the rotation of the input shaft portion 14 is restricted by the displacement catching portion 32 being caught by the case receiving portion 61b. On the other hand, the displacement catching portion 32 does not catch on the third catching portion 54, whereby the rotation of the output shaft portion 15 is not restricted. Therefore, the output shaft portion 15 does not rotate depending on the power of the drive motor 11, but the rotation of the output shaft portion 15 is not prohibited.

As a modified example 12, the power transmission device 20 may be provided between the transmission 12 and the wheels instead of being provided between the drive motor 11 and the transmission 12. That is, the power transmission device 20 may be provided on the downstream side rather than the upstream side of the transmission 12 in the path for transmitting the power. Further, the drive system 10 may not include the transmission 12. In this case, the power transmission device 20 is provided between the drive motor 11 and the wheels. That is, the power transmission device 20 may be provided on the downstream side of the drive motor 11 in the power transmission path.

As a modified example 13, the center line CL of the input shaft portion 14 and the center line of the output shaft portion 15 do not have to match. For example, the output shaft portion 15 is provided at a position displaced from the input shaft portion 14 in the radial direction β with the center line extending parallel to the center line CL of the input shaft portion 14. In this configuration, the center lines of the fixed rotary body 22 and the displacement rotary body 21 coincide with the center line CL of the input shaft portion 14, and transmission of gears or the like that transmits power from the fixed rotary body 22 to the output shaft portion 15. A member is provided between the fixed rotating body 22 and the output shaft portion 15. Therefore, even if the output shaft portion 15 is provided at a position deviated from the input shaft portion 14 in the radial direction β, it is possible to realize a configuration in which the output shaft portion 15 can rotate as the displacement rotor 21 rotates.

As a modified example 14, the power transmission device 20 may have a dedicated power source such as an electric motor that applies power for moving the displacement rotating body 21 in the axial direction α to the displacement rotating body 21. For example, the displacement rotator 21 is not screwed into the input shaft portion 14, and both the movement relative to the input shaft portion 14 in the axial direction α and the rotation together with the input shaft portion 14 It is attached to the input shaft portion 14 in a possible state. In this configuration, the power transmission device 20 has a configuration in which the displacement rotating body 21 moves in the axial direction α as the dedicated power source is driven. The ECU 70 is electrically connected to a dedicated power source and outputs a command signal to control the operation of the dedicated power source. The ECU 70 sets the position of the displacement rotating body 21 to any of the drive position D, the neutral position N, the reverse position R, and the parking position P by controlling the operation of the dedicated power source. Also in this configuration, since the displacement rotating body 21 is provided coaxially with the input shaft portion 14, the power transmission device 20 can be downsized.

As a modified example 15, the displacement rotating body 21 may be attached to the output shaft portion 15 so as to rotate together with the output shaft portion 15 instead of the input shaft portion 14. For example, in the modification example 14, the displacement rotating body 21 outputs in a state in which the displacement rotating body 21 can both move in the axial direction α relative to the output shaft portion 15 and rotate together with the output shaft portion 15. It is attached to the shaft portion 15. Further, similarly to the modification 14, the power transmission device 20 generates a power for moving the displacement rotator 21 in the axial direction α, and the displacement rotator 21 accompanying the driving of the exclusive power source. Moves in the axial direction α. According to this configuration, even if the displacement rotator 21 is attached to the output shaft portion 15, by displacing the displacement rotator 21, the power transmission mode from the input shaft portion 14 to the output shaft portion 15 can be switched. it can. In the configuration in which the displacement rotating body 21 is attached to the output shaft portion 15, the output shaft portion 15 corresponds to the first shaft portion and the input shaft portion 14 corresponds to the second shaft portion.

As a modified example 16, the displacement rotating body 21 does not have to be coaxial with the input shaft portion 14. For example, the displacement rotating body 21 is formed in a plate shape, and a plurality of teeth that mesh with the male screw portion 14 a of the input shaft portion 14 are arranged along the plate surface of the displacement rotating body 21. In this configuration as well, the brake device 24 holds the displacement rotor 21 in a position so as not to move in the circumferential direction γ, whereby the input shaft portion 14 rotates relative to the displacement rotor 21 and the input shaft portion 14 moves. Move in the axial direction α. In this case, the plurality of teeth of the displacement rotator 21 and the brake device 24 correspond to the motion conversion unit.

As a modification 17, the drive system 10 may have an internal combustion engine such as a gasoline engine as a power source instead of or in addition to the drive motor 11. That is, the power transmission device 20 may be mounted on a vehicle such as a hybrid vehicle equipped with an internal combustion engine as a power source.

As a modified example 18, the power transmission device 20 may be mounted on a moving body other than a vehicle such as an aircraft or a ship. Further, the power transmission device 20 may be installed in various stationary equipment such as a stationary generator, instead of being installed in a moving body. For example, the power transmission device 20 that transmits the power of the drive motor 11 from the input shaft portion 14 to the output shaft portion 15 can also be referred to as a motor output switching device that switches the output mode of the power of the drive motor 11.

11... Drive motor as power source, 12... Transmission, 14... Input shaft part as first shaft part, 14a... Male screw part, 15... Output shaft part as second shaft part, 20... Power transmission device, 21 Displacement rotating body as rotating body and driving rotating body, 24... Brake device as motion converting section and conversion forcing section, 31a... Female thread section as motion converting section, 43... First bottom section as straight travel restricting section, 54... A third catching portion serving as a straight-travel restricting portion, 61... a brake case serving as a receiving member, 61d... a case bottom surface serving as a straight-travel restricting portion, 63... a brake rotor serving as a driven rotating body, D... a drive position serving as a rotational position and a connecting position , N... Neutral position as connection release position, P... Rotation restriction position and parking position as connection position, R... Reverse position as rotation position and connection position, α... Axial direction.

Claims (20)

A power transmission device (20) for transmitting the power from the input shaft portion to the output shaft portion so that the output shaft portion (15) rotates together with the input shaft portion (14) that rotates by the power of the power source (11). And
A rotating body (21) that rotates together with a first shaft portion (14), which is one of the input shaft portion and the output shaft portion, and is rotated by being caught by a predetermined receiving member (61). By the rotation restricting position (P) for restricting rotation and the second shaft part (15) which is not the first shaft part of the input shaft part and the output shaft part without being caught by the receiving member, A rotating body (21) movable to a rotation position (D, R) for rotating both the first shaft portion and the second shaft portion;
Equipped with
The power transmission device, wherein the rotating body extends in a tubular shape along an outer peripheral surface of the first shaft portion and is provided coaxially with the first shaft portion at both the rotation restriction position and the rotation position. The power transmission device according to claim 1, wherein the rotating body is hooked on the second shaft portion in addition to the receiving member at the rotation restriction position. The rotating body is displaced between the rotation restricting position and the rotating position by moving relative to the first shaft portion in the axial direction (α) of the first shaft portion. The power transmission device described in. A motion conversion unit that converts the rotational movement of the input shaft portion into a rectilinear movement in which the rotating body moves straight along the first shaft portion so that the rotating body moves to the rotation restriction position and the rotation position. 24, 31a), The power transmission device according to claim 1. A linear movement restricting portion (43, 54, 61d) provided side by side along the first shaft portion on the rotating body to restrict the linear movement of the rotating body by contacting the rotating body. The power transmission device according to claim 4. The motion conversion unit,
A conversion forcing unit (24) for transitioning to a conversion forcing state for forcing a motion conversion from the rotational movement of the input shaft section to the rectilinear movement of the rotating body, and a conversion releasing state for releasing the conversion forcing state. The power transmission device according to claim 4, which has. The first shaft portion is the input shaft portion,
The motion conversion unit,
A female screw portion (31a) provided on the inner peripheral surface of the rotating body and meshing with a male screw portion (14a) provided on the outer peripheral surface of the input shaft portion,
The conversion forcing unit is
In the conversion forced state, the input shaft portion is relatively rotated with respect to the rotating body by restricting the rotation of the rotating body,
The power transmission device according to claim 6, wherein, in the conversion-released state, the rotating body is rotated together with the input shaft portion without restricting rotation of the rotating body. The motion conversion unit,
When the rotating body is referred to as a driving rotating body, the driving rotating body rotates in the axial direction of the input shaft portion with respect to the input shaft portion in a state where the rotating body rotates together with the input shaft portion in accordance with the rotation of the driving rotating body. In a state where the rotation with respect to the input shaft portion is slowed down together with the main driving rotor without moving relative to α), the main driving rotor is moved relative to the input shaft portion in the axial direction. Has a driven rotor (63),
The conversion forcing unit is
In the conversion forced state, by restricting the rotation of the driven rotor, the rotation of the main rotor is restricted,
The power transmission device according to claim 7, wherein in the conversion released state, the rotation of the driven rotor is not regulated and the rotation of the main rotor is not regulated. The power source is a traveling drive source mounted on a vehicle for traveling the vehicle,
The output shaft portion is a shaft for rotating an axle mounted on the vehicle,
2. The rotating body moves to the rotation restriction position when the shift range of the vehicle is switched to a parking range, and moves to the rotation position when the shift range is switched to a drive range or a reverse range. The power transmission device according to claim 1. 10. The rotating body is movable to a neutral position (N) that is not caught by any of the receiving member and the second shaft portion, in addition to the rotation restricting position and the rotating position. The power transmission device as described in any one of the above. A power transmission device (20) for transmitting the power from the input shaft portion to the output shaft portion so that the output shaft portion (15) rotates together with the input shaft portion (14) that rotates by the power of the power source (11). And
A rotating body (21) that rotates together with a first shaft portion (14), which is one of the input shaft portion and the output shaft portion, and is rotated by being caught by a predetermined receiving member (61). By the rotation restricting position (P) for restricting rotation and the second shaft part (15) which is not the first shaft part of the input shaft part and the output shaft part without being caught by the receiving member, A rotational position (D, R) that rotates both the first shaft portion and the second shaft portion, and a rotating body (21) that is relatively movable with respect to the first shaft portion,
A motion conversion unit that converts the rotational movement of the input shaft portion into a rectilinear movement in which the rotating body moves straight along the first shaft portion so that the rotating body moves to the rotation position and the rotation restriction position ( 24, 31a),
Power transmission device. A power transmission device (20) for transmitting the power from the input shaft portion to the output shaft portion so that the output shaft portion (15) rotates together with the input shaft portion (14) that rotates by the power of the power source (11). And
A rotating body (21) rotating together with a first shaft portion (14) which is one of the input shaft portion and the output shaft portion, wherein the first shaft portion of the input shaft portion and the output shaft portion is The first shaft is located at a connection position (D, P, R) connected to the second shaft part (15) on the other side and a connection release position (N) at which the connection with the second shaft part is disconnected. A rotating body (21) movable relative to the part,
Equipped with
The power transmission device, wherein the rotating body extends in a tubular shape along an outer peripheral surface of the first shaft portion and is provided coaxially with the first shaft portion at both the connection position and the connection release position. 13. The rotating body is displaced between the connection position and the connection release position by moving relative to the first shaft portion in the axial direction (α) of the first shaft portion. Power transmission device. A motion conversion unit that converts the rotational movement of the input shaft portion into a rectilinear movement in which the rotation body moves straight along the first shaft portion so that the rotation body moves to the connection position and the connection release position ( 24, 31a), The power transmission device according to claim 12 or 13. A linear movement restricting portion (43, 54, 61d) provided side by side along the first shaft portion on the rotating body to restrict the linear movement of the rotating body by contacting the rotating body. The power transmission device according to claim 14. The motion conversion unit,
A conversion forcing unit (24) for transitioning to a conversion forcing state for forcing a motion conversion from the rotational movement of the input shaft section to the rectilinear movement of the rotating body, and a conversion releasing state for releasing the conversion forcing state. The power transmission device according to claim 14, which is provided. The first shaft portion is the input shaft portion,
The motion conversion unit,
A female screw portion (31a) provided on the inner peripheral surface of the rotating body and meshing with a male screw portion (14a) provided on the outer peripheral surface of the input shaft portion,
The conversion forcing unit is
In the conversion forced state, the input shaft portion is relatively rotated with respect to the rotating body by restricting the rotation of the rotating body,
The power transmission device according to claim 16, wherein, in the conversion released state, the rotating body is rotated together with the input shaft portion without restricting rotation of the rotating body. The motion conversion unit,
When the rotating body is referred to as a driving rotating body, the driving rotating body rotates in the axial direction of the input shaft portion with respect to the input shaft portion in a state where the rotating body rotates together with the input shaft portion in accordance with the rotation of the driving rotating body. In a state where the rotation with respect to the input shaft portion is slowed down together with the main driving rotor without moving relative to α), the main driving rotor is moved relative to the input shaft portion in the axial direction. Has a driven rotor (63),
The conversion forcing unit is
In the conversion forced state, by restricting the rotation of the driven rotor, the rotation of the main rotor is restricted,
The power transmission device according to claim 17, wherein, in the conversion released state, the rotation of the driven rotor is not regulated and the rotation of the main rotor is not regulated. The power source is a traveling drive source mounted on a vehicle for traveling the vehicle,
The output shaft portion is a shaft for rotating the wheels of the vehicle,
13. The rotating body moves to the connection position when a shift range of the vehicle is switched to a drive range or a reverse range, and moves to the disconnection position when the shift range is switched to a neutral range. The power transmission device according to claim 1. A power transmission device (20) for transmitting the power from the input shaft portion to the output shaft portion so that the output shaft portion (15) rotates together with the input shaft portion (14) that rotates by the power of the power source (11). And
A rotating body (21) rotating together with a first shaft portion (14) which is one of the input shaft portion and the output shaft portion, wherein the first shaft portion of the input shaft portion and the output shaft portion is The first shaft is provided at a connection position (D, R, P) connected to the other second shaft part (15) and a connection release position (N) at which the connection with the second shaft part is released. A rotating body (21) movable relative to the part,
A motion conversion unit (24, 31a) that converts the rotational motion of the input shaft into a linear motion that moves straight along the first shaft so that the rotating body moves between the connection position and the disconnection position. When,
Power transmission device.

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