CN107303806A - power coupling device for hybrid electric vehicle - Google Patents

Abstract

A power coupling device for a hybrid electric vehicle, comprising: a central shaft; a motor sleeved outside the central shaft, the motor includes a rotor and a rotor support connected in a torsion-resistant manner, and the rotor support can rotate around the central shaft; The first and second one-way clutches are sleeved on the central shaft; the first one-way clutch is set to: realize locking when the rotational speed of the central shaft is greater than the rotational speed of the rotor support, and realize locking when the rotational speed of the central shaft is lower than the rotational speed of the rotor support Unlocking; the second one-way clutch is set to: realize locking when the rotational speed of the central shaft is lower than the rotational speed of the rotor support, and realize unlocking when the rotational speed of the central shaft is greater than the rotational speed of the rotor support. Compared with the existing friction clutches, the axial space occupied by the first one-way clutch and the second one-way clutch in the technical solution of the present invention is reduced, and the large torque output by the multi-cylinder internal combustion engine can be transmitted.

Description

Power couplings for hybrid vehicles

technical field

The invention relates to the technical field of hybrid electric vehicles, in particular to a power coupling device for hybrid electric vehicles.

Background technique

Existing hybrid vehicles include an internal combustion engine, a transmission, and a power coupling device arranged between the internal combustion engine and the transmission, wherein the power coupling device is not only used to transmit or cut off the power transmission between the internal combustion engine and the transmission, but also provides another drive to drive the vehicle. The power source-electric motor, makes the hybrid electric vehicle have at least three working modes, which are pure internal combustion engine mode, pure electric mode, and hybrid power mode. The power coupling device is provided with a clutch, and by controlling the clutch to engage or disengage, the hybrid vehicle can switch among the above three working modes.

However, the above-mentioned power coupling device has the following disadvantages: the clutch is a friction clutch, which includes a counter pressure plate, a clutch disc, a pressure plate, a diaphragm spring, an actuator for pushing the diaphragm spring to move, etc. Multiple components cause the power coupling device to occupy a large axial space. In addition, the torque capacity of the friction clutch is limited due to the limitation of the radial space, so it cannot be used to transmit the high torque output by the multi-cylinder internal combustion engine.

Contents of the invention

The problem to be solved by the present invention is: the clutch in the power coupling device of the existing hybrid electric vehicle is a friction clutch, which occupies a relatively large axial space, and its torque capacity is limited, so it cannot be used to transmit the large output of the multi-cylinder internal combustion engine. torque.

In order to solve the above problems, the present invention provides a power coupling device for a hybrid electric vehicle, comprising: a central shaft; a motor sleeved outside the central shaft, and there is a gap between the motor and the central shaft in the radial direction , the motor includes a rotor and a rotor bracket that are anti-torsionally connected, and the rotor bracket can rotate around the central shaft; the first and second one-way clutches are sleeved on the central shaft at intervals in the axial direction, and the The first and second one-way clutches are both located in the interval, and both include an inner ring and an outer ring, the inner ring is connected to the central shaft in a torsion-resistant manner, and the outer ring is connected to the rotor support in a torsion-resistant manner; The first one-way clutch is set to: realize locking when the rotation speed of the central shaft is greater than the rotation speed of the rotor support, and realize unlocking when the rotation speed of the central shaft is lower than the rotation speed of the rotor support; the second The one-way clutch is set to: realize locking when the rotation speed of the central shaft is lower than the rotation speed of the rotor support, and realize unlocking when the rotation speed of the central shaft is greater than the rotation speed of the rotor support; the second one-way clutch The inner ring and the outer ring of the inner ring can reciprocate axially relative to switch between the original position and the removed state; when the rotation speed of the central shaft is lower than the rotation speed of the rotor support: when the inner ring of the second one-way clutch Or the outer ring is in the original position, the second one-way clutch can transmit torque; when the inner ring or outer ring of the second one-way clutch is in the removed state, the second one-way clutch cannot transmit torque.

Optionally, the inner ring or the outer ring of the second one-way clutch is used to be in the moving out state when the hybrid electric vehicle is in a pure internal combustion engine mode, a pure electric mode and/or an energy recovery mode.

Optionally, the second one-way clutch further includes:

a plurality of locking elements arranged at intervals along the circumferential direction between the inner and outer rings of the second one-way clutch;

A cage located between the inner and outer rings of the second one-way clutch, the cage is provided with a plurality of pockets arranged at intervals along the circumferential direction, and each of the locking pieces is respectively placed in each of the pockets.

Optionally, the power coupling device also includes:

an annular casing located radially outside the motor;

An actuator supported on the annular housing, the actuator is used to drive the inner ring or the outer ring of the second one-way clutch to reciprocate axially to switch between the original position and the removed state;

The actuator is used to drive the inner ring or the outer ring of the second one-way clutch to be in the shifted state when the hybrid electric vehicle is in a pure internal combustion engine mode, a pure electric mode and/or an energy recovery mode.

Optionally, the actuator includes: an actuator and an elastic member, which are located on both axial sides of the inner ring or the outer ring of the second one-way clutch;

The actuating part is used for: pushing the inner ring or the outer ring of the second one-way clutch to move axially from the original state to the moving state, and compressing the elastic member;

The elastic member is used to drive the inner ring or the outer ring of the second one-way clutch to move axially from the removed state to the original state by restoring deformation when the actuator part is withdrawn .

Optionally, the implementing agency also includes:

An annular support seat sleeved on the central shaft, the annular support seat is fixed to the annular shell;

A rotary motor sleeved on the annular support seat, the rotary motor and the annular support seat are both located in the interval;

The actuator cooperates with the rotary motor to convert the rotary motion output by the rotary motor into linear motion;

When the rotating electrical machine is rotating forward, the actuator pushes the inner ring or the outer ring of the second one-way clutch to move to the moving-out state;

When the rotating electrical machine reverses, the actuator is retracted.

Optionally, the stator of the rotating electrical machine is fixed on the annular support seat, and the rotor of the rotating electrical machine is located radially outside the stator and is provided with external threads;

The execution part includes: a moving ring provided with an internal thread; several balls arranged in sequence along the axial direction between the rotor of the rotating electrical machine and the moving ring;

When the rotor of the rotary electric machine rotates, the moving ring moves in the axial direction.

Optionally, the power coupling device further includes: a thrust bearing sleeved on the central shaft, and the thrust bearing axially abuts between the actuator part and the inner ring of the second one-way clutch between.

Optionally, when the inner ring or the outer ring of the second one-way clutch is in the original state, the actuator part and the inner ring or the outer ring of the second one-way clutch axially resist, and the elastic member Always compressed.

Optionally, the power coupling device further includes: a flexible disk located on the side of the rotor support facing the gearbox in the axial direction, the radially outer end of the flexible disk is in contact with the axial direction of the rotor support Fixed connection at one end.

Compared with the prior art, the technical solution of the present invention has the following advantages:

The first one-way clutch and the second one-way clutch can transmit torque when locked, and play the role of conventional friction clutches. Compared with the existing friction clutches that include multiple components such as the counter pressure plate, clutch plate, pressure plate, diaphragm spring, and actuator arranged in sequence along the axial direction, the first one-way clutch and the second one-way clutch in the technical solution of the present invention The axial space occupied by the one-way clutch is reduced. In addition, according to the working principle of the first one-way clutch, the second one-way clutch, and the friction clutch, it can be known that the first one-way clutch and the second one-way clutch can obtain a larger torque capacity than the friction clutch when locked, Therefore, the high torque output by the multi-cylinder internal combustion engine can be transmitted.

In addition, the inner ring and the outer ring of the second one-way clutch can reciprocate relative to each other in the axial direction to switch between the original position and the removed state. When the rotation speed of the central shaft is lower than the rotation speed of the rotor support, the inner ring of the second one-way clutch The ring or the outer ring can be switched to the removed state to cut off the torque transmission between the central shaft and the rotor support, which can avoid the energy waste caused by the internal combustion engine being driven as a load and the negative impact of poor ride comfort.

Description of drawings

Fig. 1 is a sectional view of a power coupling device for a hybrid vehicle in an embodiment of the present invention;

Fig. 2 is a schematic diagram of power transmission of the power coupling device shown in Fig. 1 when the hybrid electric vehicle is in pure internal combustion engine mode;

Fig. 3 is a schematic diagram of power transmission of the power coupling device shown in Fig. 1 when the hybrid electric vehicle is in pure electric mode;

Fig. 4 is a schematic diagram 1 of power transmission of the power coupling device shown in Fig. 1 when the hybrid electric vehicle is in the hybrid mode;

Fig. 5 is a second schematic diagram of power transmission of the power coupling device shown in Fig. 1 when the hybrid electric vehicle is in the hybrid mode;

Fig. 6 is a schematic diagram of power transmission of the power coupling device shown in Fig. 1 when the hybrid electric vehicle is in the internal combustion engine starting mode;

Fig. 7 is a schematic diagram of power transmission of the power coupling device shown in Fig. 1 when the hybrid electric vehicle is in the energy recovery mode;

Fig. 8 is a cross-sectional view of the actuator in the power coupling device shown in Fig. 1, and the single dotted line in the figure indicates the central axis of the central shaft;

The central axis of the central axis is located on the sectional plane of the above sectional view, and the arrows in Figures 2 to 8 indicate the direction of power transmission. In addition, in order to reduce the size of the drawing, Figures 1 to 8 only show the The upper half of the central axis, the lower half of the central axis is not shown.

detailed description

In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in FIG. 1 , this embodiment provides a power coupling device for a hybrid electric vehicle, which includes a central shaft 1 for transmitting torque output by an internal combustion engine E to a transmission T. In this embodiment, a shock absorber A is sleeved on the axial end of the central shaft 1 close to the internal combustion engine E, and the torque output by the internal combustion engine E is transmitted to the central shaft 1 through the shock absorber A. In a modified example of this embodiment, the shock absorber A can also be replaced by a dual-mass flywheel.

The central shaft 1 is covered with a motor 2, and the motor 2 and the internal combustion engine E together serve as a power source for driving the hybrid vehicle. In this embodiment, the motor 2 can work in the motor mode to provide power for the hybrid vehicle, and also can work in the generator mode to convert the recovered energy into electrical energy for storage. Of course, in a modified example of this embodiment, the motor 2 may also only be able to work in the motor mode.

The electric machine 2 comprises a rotor 20 and a rotor carrier 21 which are connected in a rotationally fixed manner, so that one of them rotates around the central axis 1 when the other rotates around the central axis 1 . When the motor 2 works in the motor mode, the rotor 20 drives the rotor bracket 21 to rotate around the central axis 1 . When the motor 2 works in generator mode, the rotor bracket 21 drives the rotor 20 to rotate. On the one hand, the rotor support 21 is used to support the fixed rotor 20 , and on the other hand, the rotor support 21 is used to realize the power coupling between the internal combustion engine E and the electric machine 2 . How the rotor bracket 21 realizes the power coupling of the internal combustion engine E and the motor 2 will be introduced in the working principle of the power coupling device.

There is a gap G between the motor 2 and the central shaft 1 in the radial direction. In the technical solution of the present invention, unless otherwise specified, the radial direction refers to the radial direction of the central shaft 1 . A first one-way clutch 3 and a second one-way clutch 4 are arranged in the gap G, and the first one-way clutch 3 and the second one-way clutch 4 are sheathed on the central shaft 1 at intervals along the axial direction. In the technical solution of the present invention, unless otherwise specified, the axial direction refers to the axial direction of the central shaft 1 .

In this embodiment, the first one-way clutch 3 is closer to the transmission T than the second one-way clutch 4 in the axial direction. In a modified example of the present embodiment, the second one-way clutch 4 may be closer to the transmission T than the first one-way clutch 3 in the axial direction.

The first one-way clutch 3 includes an inner ring 30 and an outer ring 31 sleeved outside the inner ring 30 , and the second one-way clutch 4 includes an inner ring 40 and an outer ring 41 sleeved outside the inner ring 40 . The inner rings 30, 40 are connected to the central shaft 1 in a torsion-proof manner, so that the inner rings 30, 40 rotate when the central shaft 1 rotates, and vice versa. The outer rings 31, 41 are connected to the rotor support 21 in a torsion-resistant manner, so that the outer rings 31, 41 rotate when the rotor support 21 rotates, and vice versa.

The first one-way clutch 3 is configured to: realize locking when the rotational speed of the central shaft 1 is greater than the rotational speed of the rotor support 21 , and realize unlocking when the rotational speed of the central shaft 1 is lower than the rotational speed of the rotor support 21 . When the first one-way clutch 3 is locked, one of the inner ring 30 and the outer ring 31 rotates to drive the other to rotate, realizing the linkage between the inner ring 30 and the outer ring 31, and the first one-way clutch 3 can transmit torque . When the first one-way clutch 3 is unlocked, the inner ring 30 and the outer ring 31 are no longer linked, the outer ring 31 can rotate freely relative to the inner ring 30, and the first one-way clutch 3 cannot transmit torque.

The second one-way clutch 4 is configured to realize locking when the rotational speed of the central shaft 1 is lower than the rotational speed of the rotor support 21 , and to realize unlocking when the rotational speed of the central shaft 1 is greater than the rotational speed of the rotor support 21 . When the second one-way clutch 4 is locked, one of the inner ring 40 and the outer ring 41 rotates to drive the other to rotate, realizing the linkage between the inner ring 40 and the outer ring 41, and the second one-way clutch 4 can transmit torque . When the second one-way clutch 4 is unlocked, the inner ring 40 and the outer ring 41 are no longer linked, the inner ring 40 can rotate freely relative to the outer ring 41, and the second one-way clutch 4 cannot transmit torque.

The working principle of the power coupling device of this embodiment will be introduced below with reference to FIG. 2 to FIG. 7 , and the arrows in the figures indicate the direction of power transmission.

As shown in Figure 2, when a hybrid vehicle works in pure internal combustion engine mode, the internal combustion engine E is the only power source driving the vehicle, and the motor 2 does not provide power, and the torque output by the internal combustion engine E is transmitted to the central shaft 1 through the shock absorber A in turn , realizing that the rotation speed of the central shaft 1 is greater than the rotation speed of the rotor support 21, so that the first one-way clutch 3 can be locked, and the torque can be transmitted, so that the torque output from the internal combustion engine E to the central shaft 1 continues to pass through the first one-way clutch 3 in sequence The inner ring 30, outer ring 31, and rotor support 21 are transmitted to the transmission T.

As shown in Figure 3, when the hybrid electric vehicle works in pure electric mode, the motor 2 is the only power source for driving the vehicle, and the internal combustion engine E does not provide power. The torque output by the rotor 20 of the motor 2 is transmitted to the transmission T via the rotor bracket 21 . At this time, since the rotational speed of the central shaft 1 is lower than that of the rotor support 21, the first one-way clutch 3 is unlocked and cannot transmit torque, and the torque output by the rotor support 21 will not be transmitted to the central shaft 1 via the first one-way clutch 3 .

As shown in FIG. 4 to FIG. 5 , when the hybrid electric vehicle is working in the hybrid power mode, the motor 2 and the internal combustion engine E are jointly used as a power source for driving the vehicle. On the one hand, the torque output by the rotor 20 of the motor 2 is transmitted to the rotor support 21; One of the clutches 4 is transmitted to the rotor support 21 , and the torque output by the electric motor 2 and the internal combustion engine E are coupled at the rotor support 21 and then transmitted to the transmission T.

As shown in Figure 4, when the rotational speed of the central shaft 1 driven by the internal combustion engine E is greater than the rotational speed of the rotor support 21 driven by the motor 2, the first one-way clutch 3 realizes locking, and the second one-way clutch 4 realizes unlocking , the torque output by the central shaft 1 is transmitted to the rotor support 21 via the first one-way clutch 3 .

As shown in Figure 5, when the rotational speed of the central shaft 1 driven by the internal combustion engine E is lower than the rotational speed of the rotor support 21 driven by the motor 2, the first one-way clutch 3 realizes unlocking, and the second one-way clutch 4 realizes locking , the torque output by the central shaft 1 is transmitted to the rotor support 21 via the second one-way clutch 4 .

As shown in Figure 6, when the hybrid electric vehicle works under the internal combustion engine starting mode, the motor 2 is used as a starter motor, and its output torque is transmitted to the rotor bracket 21, so that the rotation speed of the rotor bracket 21 is greater than the rotation speed of the central shaft 1, so that the second The one-way clutch 4 realizes locking and can transmit torque, so that the torque output from the motor 2 to the rotor bracket 21 continues to be transmitted to the The internal combustion engine E is thus started. At this moment, the first one-way clutch 3 realizes unlocking and cannot transmit torque.

As shown in FIG. 7 , when the hybrid electric vehicle works in the energy recovery mode, the wheels drive the rotor 20 to rotate through the transmission T and the rotor bracket 21 in turn, so that the motor 2 can convert mechanical energy into electrical energy and store it. When the vehicle is in a braking state or a coasting state, the hybrid electric vehicle enters the energy recovery mode.

It can be seen from the above analysis that in the technical solution of the present invention, the first one-way clutch 3 and the second one-way clutch 4 can transmit the torque output by the internal combustion engine E when locked, and play the role of the existing friction clutches. Compared with the existing friction clutches that include multiple components such as the opposing pressure plate, clutch plates, pressure plates, diaphragm springs, and actuators arranged in sequence along the axial direction, the first one-way clutch 3 and the second one-way clutch 3 in the technical solution of the present invention The axial space occupied by the two one-way clutches 4 is reduced.

As shown in FIG. 1 , the first one-way clutch 3 further includes several locking elements 32 arranged at intervals along the circumferential direction between the inner ring 30 and the outer ring 31 . When the rotation speed of the inner ring 30 is greater than the rotation speed of the outer ring 31, the locking member 32 can be tightly pressed against the inner ring 30 and the outer ring 31, and the locking member 32 and the inner ring 30 are locked. Friction is generated between the member 32 and the outer ring 31 to realize the locking of the first one-way clutch 3 . When the rotation speed of the inner ring 30 is lower than the rotation speed of the outer ring 31, at least one of the locking member 32 and the inner ring 30 and between the locking member 32 and the outer ring 31 will not generate friction force, so as to realize the first one-way Unlocking of clutch 3.

Likewise, the second one-way clutch 4 further includes several locking elements 42 arranged at intervals along the circumferential direction between the inner ring 40 and the outer ring 41 . When the rotation speed of the outer ring 41 is greater than the rotation speed of the inner ring 40, the locking member 42 can be tightly abutted against the inner ring 40 and the outer ring 41, and the locking member 42 and the inner ring 40 are locked. Friction is generated between the member 42 and the outer ring 41 to realize the locking of the second one-way clutch 4 . When the rotation speed of the outer ring 41 is lower than the rotation speed of the inner ring 40, at least one of the locking member 42 and the inner ring 40 and between the locking member 42 and the outer ring 41 will not generate friction force, so as to realize the second one-way Unlocking of clutch 4.

Therefore, according to the working principle of the first one-way clutch 3 and the second one-way clutch 4, the first one-way clutch 3 and the second one-way clutch 4 transmit torque through the locking members 32 and 42 respectively, and the locking members 32, 42 can bear very high load. According to the working principle of the existing friction clutch, the friction plate of the friction clutch is made of wear-resistant material, steel wire, etc., and the surface pressure it can withstand is far lower than that of the locking members 32, 42. Therefore, the first one-way The clutch 3 and the second one-way clutch 4 can obtain a larger torque capacity than the friction clutch when locked, so they can transmit the large torque output by the multi-cylinder internal combustion engine.

In this embodiment, in this embodiment, the power coupling device further includes an annular casing 5 located radially outside the motor 2, and the annular casing 5 is fixed. When the power coupling device is applied to an automobile, the annular casing 5 is fixed on the fixed part of the automobile and has an inner cavity (not marked), and the motor 2, the first one-way clutch 3, and the second one-way clutch 4 are all located in the Inside the lumen.

An actuator 6 is supported on the annular housing 5, and the actuator 6 is used to drive the inner ring 40 and the outer ring 41 of the second one-way clutch 4 to reciprocate axially relative to each other to switch between the original position and the removed state. In this embodiment, the outer ring 41 is stationary in the axial direction, and the inner ring 40 can reciprocate in the axial direction. When the inner ring 40 of the second one-way clutch 4 is in the original position, as shown in Figure 4, Figure 5, and Figure 6, the second one-way clutch 4 has the ability to transmit torque, but when the second one-way clutch When the inner ring 40 of 4 is in the moving state, as shown in FIGS. 2 , 3 and 7 , the second one-way clutch 4 does not have the ability to transmit torque. The contact area between the inner ring 40 and the locking member 42 in the home state is greater than the contact area between the inner ring 40 and the locking member 42 in the removed state.

As shown in Fig. 2, Fig. 3 and Fig. 7, in this embodiment, the inner ring 40 is completely separated from the locking member 42 in the state of removal. There may also be partial contact with the locking member 42 when it is moved out, as long as the second one-way clutch 4 does not have torque transmission capability all the time.

When the torque transmission of the second one-way clutch 4 brings negative effects such as energy waste and poor riding comfort, the actuator 6 drives the inner ring 40 of the second one-way clutch 4 to move to the disengaged state. E.g:

As shown in Figure 2, when the hybrid electric vehicle is working in the pure internal combustion engine mode, the actuator 6 drives the inner ring 40 of the second one-way clutch 4 to move to the state of removal, so that the second one-way clutch 4 does not have the ability to transmit torque. ability. When the power output by the internal combustion engine E fluctuates momentarily, so that the rotation speed of the central shaft 1 suddenly becomes lower than the rotation speed of the rotor support 21, the first one-way clutch 3 is switched from locking to unlocking, and torque can no longer be transmitted. In this way, the torque transmission between the internal combustion engine E and the transmission T is interrupted, and the power fluctuation of the internal combustion engine E is not transmitted to the wheels, so that the passengers will not feel the shaking of the car, improving ride comfort.

As shown in Figure 3, when the hybrid electric vehicle is working in the electric mode, the actuator 6 drives the inner ring 40 of the second one-way clutch 4 to move to the state of removal, so that the second one-way clutch 4 does not have the ability to transmit torque , preventing the torque output by the rotor support 21 from being transmitted to the central shaft 1 through the outer ring 41 and the inner ring 40 in sequence, and avoiding the waste of power output by the motor 2 because the internal combustion engine E is driven as a load.

As shown in Figure 7, when the hybrid electric vehicle is working in the energy recovery mode, the actuator 6 drives the inner ring 40 of the second one-way clutch 4 to move to the state of removal, so that the second one-way clutch 4 does not have the ability to transmit torque. The ability prevents the torque output by the rotor support 21 from being sequentially transmitted to the central shaft 1 through the outer ring 41 and the inner ring 40, and avoids waste of recovered energy due to the internal combustion engine E being driven as a load.

It should be noted that, in the technical solution of the present invention, the inner ring 40 of the second one-way clutch 4 can be reciprocated in the axial direction relative to the outer ring 41 through means other than the actuator 6 so that Toggles between bit and shifted out states.

In this embodiment, the second one-way clutch 4 also includes a cage (not shown) located between the inner ring 40 and the outer ring 41. Each locking piece 42 of the clutch 4 is respectively located in each pocket. The function of the cage includes: separating each locking piece 42 in the circumferential direction; restricting the locking piece 42 in the axial direction, preventing the actuator 6 from driving the inner ring 40 to move axially relative to the outer ring 41 to the removal state , the locking member 42 moves to the outside of the outer ring 41 driven by the inner ring 40 .

As shown in FIG. 1 to FIG. 2 , in this embodiment, the actuator 6 includes an actuator 61 and an elastic member 62 , which are located on both axial sides of the inner ring 40 of the second one-way clutch 4 . The actuating part 61 is used for: pushing the inner ring 40 of the second one-way clutch 4 to move axially from the original state to the moving state, and compress the elastic member 62 . When the inner ring 40 moves axially from the original position to the moved-out state, a certain axial displacement will occur, and correspondingly, the actuator 61 will also move along the axial direction from the initial position (shown in FIG. 1 ). To move to produce a certain displacement in the axial direction. When the inner ring 40 of the second one-way clutch 4 needs to move axially from the removed state to the original state, the actuator 61 withdraws (that is, returns to the initial position), and the compressed elastic member 62 can Restore the deformation, and apply an axial force from the inner ring 40 to the actuator 61 to the inner ring 40, thereby driving the inner ring 40 of the second one-way clutch 4 to move axially from the removed state to the original position state.

In this embodiment, the elastic member 62 is always in a compressed state, that is, even if the inner ring 40 of the second one-way clutch 4 is in the original state, the elastic member 62 will exert a force directed from the inner ring 40 to the inner ring 40 . The axial force of the actuator 61. When the inner ring 40 of the second one-way clutch 4 is in the original position, the actuating part 61 and the inner ring 40 of the second one-way clutch 4 axially resist, and the actuating part 61 applies a self-actuating part 61 to the inner ring 40. Axial force directed towards the inner ring 40. In this way, when the inner ring 40 of the second one-way clutch 4 is in the original position, the inner ring 40 can be limited in the axial direction under the action of the actuator 61 and the elastic member 62 .

In this embodiment, the elastic member 62 is a spring. In a modified example of this embodiment, the elastic member 62 may also be other elastic members capable of elastic deformation.

As shown in FIG. 1 and FIG. 8 , in this embodiment, the actuator 6 further includes an annular support seat 64 and a rotating motor 65 located in the space between the motor 2 and the central shaft 1 . The annular support seat 64 is sleeved on the central shaft 1 and fixed with the annular casing 5 . The rotating motor 65 is sleeved on the annular support base 64 . The actuator 61 cooperates with the rotary motor 65 to convert the rotary motion output by the rotary motor 65 into a linear motion, so as to drive the inner ring 40 to move axially. When the rotating electrical machine 65 is rotating forward, the actuator 61 pushes the inner ring 40 of the second one-way clutch 4 to move to the moving state. When the rotary motor 65 is reversed, the actuator 61 is moved in the opposite axial direction to be retracted.

Further, in this embodiment, the rotating electric machine 65 is an external rotor electric machine, its stator 650 is fixed on the annular support base 64 , and its rotor 651 is located radially outside of the stator 650 and is provided with external threads. The actuator 61 includes: a moving ring 66 provided with an internal thread; a plurality of balls 67 arranged in sequence along the axial direction between the rotor 651 and the moving ring 66 . The moving ring 66 , the balls 67 and the rotor 651 of the rotating motor 65 together form a screw and ball pair, so that when the rotor 651 of the rotating motor 65 rotates, the moving ring 66 moves in the axial direction.

In this embodiment, the space occupied by the actuator 6 can be reduced by arranging the rotating motor 65 radially inside the actuator 61 and the rotor 651 of the rotating motor 65 serving as a part of the screw and ball pair. Of course, without considering the space occupied by the actuator 6, the rotary motor 65 may not be arranged radially inside the actuator 61, and the rotor 651 of the rotary motor 65 may not also serve as a part of the screw and ball pair.

In the modification example of this embodiment, there may be no ball 67 in the actuator 61, and the rotor 651 is screwed with the moving ring 66. In this case, when the rotor 651 of the rotary motor 65 rotates, the movement of the moving ring 66 can also be realized. Move along the axis.

It should be noted that, in the technical solution of the present invention, the execution part 61 can also adopt other mechanisms capable of converting the rotary motion output by the rotary motor 65 into linear motion, such as a worm gear mechanism, etc., and should not be limited to the given implementation example.

In addition, in this embodiment, the actuator 61 uses an electric method to drive the inner ring 40 to move axially, but in the technical solution of the present invention, the actuator 61 can also use other methods to drive the inner ring 40 to move axially. To move, such as by hydraulic or pneumatic means. For example, the actuator 61 can be a movable piston, which is arranged in the cylinder, and the piston can be driven to move by injecting liquid or gas into the cylinder, thereby driving the inner ring 40 to move in the axial direction. When the liquid or gas in the cylinder is released, the piston can be driven back by the inner race 40 driven by the compressed elastic member 62 .

Continuing to refer to FIG. 1, in this embodiment, the power coupling device further includes: a thrust bearing 63 sleeved on the central shaft 1, and the thrust bearing 63 abuts against the actuator 61 and the second one-way shaft in the axial direction. between the inner rings 40 of the clutch 4. When the second one-way clutch 4 transmits torque, the thrust bearing 63 can prevent the actuator 61 from directly contacting and rotating relative to the inner ring 40 to be worn.

In a modified example of the present embodiment, the inner ring 40 is stationary in the axial direction, and the outer ring 41 can reciprocate in the axial direction to switch between the original position and the removed state. When the outer ring 41 of the second one-way clutch 4 is in the original position, as shown in Figure 4, Figure 5 and Figure 6, the second one-way clutch 4 has the ability to transmit torque, as shown in Figure 2, Figure 3, As shown in FIG. 7 , when the outer ring 41 of the second one-way clutch 4 is in the disengaged state, the second one-way clutch 4 does not have the ability to transmit torque.

In the technical solution of this modified example: when the hybrid electric vehicle is working in the pure internal combustion engine mode, the actuator 6 drives the outer ring 41 of the second one-way clutch 4 to move to the shifted state, so that the second one-way clutch 4 does not have The ability to transmit torque, the power fluctuations of the internal combustion engine E are not transmitted to the wheels. Or, when the hybrid electric vehicle is working in the electric mode or the energy recovery mode, the actuator 6 drives the outer ring 41 of the second one-way clutch 4 to move to the shifted state, so as to avoid causing the motor 2 to be driven by the internal combustion engine E as a load. The output power is wasted.

In the technical solution of this modified example, after making appropriate adjustments to the actuator 6 of this embodiment, it can still be used to drive the outer ring 41 of the second one-way clutch 4 to reciprocate in the axial direction so as to be in the original position. , Move out state to switch. Specifically, the actuating part 61 and the elastic member 62 are respectively located on both axial sides of the outer ring 41 of the second one-way clutch 4 . The actuating part 61 is used to push the outer ring 41 of the second one-way clutch 4 to move axially from the original state to the moved state, and compress the elastic member 62 . The elastic member 62 is used to drive the outer ring 41 of the second one-way clutch 4 to move axially from the removed state to the original state by means of recovery deformation when the actuator 61 is withdrawn. In this modified example, reference is made to this embodiment for the specific structures of the execution unit 61 and the elastic member 62 , which will not be repeated here.

Of course, in the technical solution of the present invention, the outer ring 41 of the second one-way clutch 4 can also be reciprocated in the axial direction by means other than the actuator 6 to switch between the original position and the moved out state.

It should be noted that, in the technical solution of the present invention, the inner ring 40 or the outer ring 41 of the second one-way clutch 4 can also be moved to the said shifted state in other modes of the hybrid vehicle, and should not be limited to the implementation The three modes mentioned in the example.

In this embodiment, the inner ring 30 of the first one-way clutch 3 is relatively static relative to the central shaft 1 in the axial direction.

In this embodiment, the annular shell 5 has an annular body portion 50, and the radial inner side of the body portion 50 has an annular rib portion 51, and the rib portion 51 is arranged at one end of the body portion 50 in the axial direction, and is connected to the annular support seat. One axial end of 64 is fixedly connected, so that the annular support seat 64 is fixed. In a specific embodiment, the annular housing 5 and the annular support base 64 are fixed by bolts.

In this embodiment, the motor 2 is an inner rotor motor, the rotor bracket 21 is located radially inside the rotor 20 , and the motor 2 further includes a stator 22 located radially outside the rotor 20 . However, it should be noted that, in the technical solution of the present invention, the structure type of the motor 2 should not be limited to this embodiment.

In this embodiment, the power coupling device further includes a flexible disc 7 and a rigid disc 8 , which are located on the side of the rotor support 21 facing the gearbox T in the axial direction. The radially outer end of the rigid disk 8 is fixed to one axial end of the rotor support 21 , and the flexible disk 7 is fixedly connected to the rigid disk 8 on the axial side of the rigid disk 8 facing away from the rotor support 21 . The radially inner end of the flexible disk 7 is fixedly connected with the sleeve 9, and the sleeve 9 is used for spline connection with the input end of the transmission T. The torque of the rotor support 21 is transmitted to the transmission T through the rigid disc 8 , the flexible disc 7 and the sleeve 9 in sequence. The flex disk 7 is capable of absorbing axial shocks by undergoing deformation.

In this embodiment, the rigid disc 8 is fixed to the rotor bracket 21 through positioning pins (not shown), the flexible disc 7 is fixed to the rigid disc 8 through bolts, and the sleeve 9 is fixed to the flexible disc 7 through bolts. Of course, in other embodiments, the rigid disk 8 and the rotor support 21 , the flexible disk 7 and the rigid disk 8 , and the sleeve 9 and the flexible disk 7 can also be fixed by other connection methods.

In a modified example of this embodiment, the rigid disk 8 may not be present. In this case, the radially outer end of the flexible disk 7 is directly fixed to one axial end of the rotor support 21 .

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention should be based on the scope defined in the claims.

Claims (10)

1. A power coupling device for a hybrid vehicle, comprising: central axis; A motor sleeved outside the central shaft, the motor is radially spaced from the central shaft, the motor includes a torque-resistant rotor and a rotor support, and the rotor support can rotate around the central shaft; It is characterized in that the power coupling device further includes: first and second one-way clutches sleeved on the central shaft at intervals along the axial direction, and the first and second one-way clutches are both located in the interval, And each includes an inner ring and an outer ring, the inner ring is connected to the central shaft for torsion, and the outer ring is connected to the rotor bracket for torsion; The first one-way clutch is configured to: realize locking when the rotation speed of the central shaft is greater than the rotation speed of the rotor support, and realize unlocking when the rotation speed of the central shaft is lower than the rotation speed of the rotor support; The second one-way clutch is configured to: realize locking when the rotation speed of the central shaft is lower than the rotation speed of the rotor support, and realize unlocking when the rotation speed of the central shaft is greater than the rotation speed of the rotor support; The inner ring and the outer ring of the second one-way clutch can reciprocate relative to each other in the axial direction to switch between the original position and the removed state; When the rotation speed of the central shaft is lower than the rotation speed of the rotor support: when the inner or outer ring of the second one-way clutch is in the original position, the second one-way clutch can transmit torque; when the The inner ring or the outer ring of the second one-way clutch is in the disengaged state, and the second one-way clutch cannot transmit torque. 2. The power coupling device according to claim 1, characterized in that, the inner ring or the outer ring of the second one-way clutch is used when the hybrid vehicle is in pure internal combustion engine mode, pure electric mode and/or energy In recovery mode, it is in the removal state. 3. The power coupling device according to claim 1, wherein the second one-way clutch further comprises: a plurality of locking elements arranged at intervals along the circumferential direction between the inner and outer rings of the second one-way clutch; A cage located between the inner and outer rings of the second one-way clutch, the cage is provided with a plurality of pockets arranged at intervals along the circumferential direction, and each of the locking pieces is respectively placed in each of the pockets. 4. The power coupling device according to claim 1, wherein the power coupling device further comprises: an annular casing located radially outside the motor; An actuator supported on the annular housing, the actuator is used to drive the inner ring or the outer ring of the second one-way clutch to reciprocate axially to switch between the original position and the removed state; The actuator is used to drive the inner ring or the outer ring of the second one-way clutch to be in the shifted state when the hybrid electric vehicle is in a pure internal combustion engine mode, a pure electric mode and/or an energy recovery mode. 5. The power coupling device according to claim 4, wherein the actuator comprises: an actuator and an elastic member, which are located on both axial sides of the inner ring or the outer ring of the second one-way clutch; The actuating part is used for: pushing the inner ring or the outer ring of the second one-way clutch to move axially from the original state to the moving state, and compressing the elastic member; The elastic member is used to drive the inner ring or the outer ring of the second one-way clutch to move axially from the removed state to the original state by restoring deformation when the actuator part is withdrawn . 6. The power coupling device according to claim 5, wherein the actuator further comprises: An annular support seat sleeved on the central shaft, the annular support seat is fixed to the annular shell; A rotary motor sleeved on the annular support seat, the rotary motor and the annular support seat are both located in the interval; The actuator cooperates with the rotary motor to convert the rotary motion output by the rotary motor into linear motion; When the rotating electrical machine is rotating forward, the actuator pushes the inner ring or the outer ring of the second one-way clutch to move to the moving-out state; When the rotating electrical machine reverses, the actuator is retracted. 7. The power coupling device according to claim 6, wherein the stator of the rotating electrical machine is fixed on the annular support base, the rotor of the rotating electrical machine is located on the radially outer side of the stator, and is provided with external threads ; The execution part includes: a moving ring provided with an internal thread; several balls arranged in sequence along the axial direction between the rotor of the rotating electrical machine and the moving ring; When the rotor of the rotary electric machine rotates, the moving ring moves in the axial direction. 8. The power coupling device according to claim 5, characterized in that, the power coupling device further comprises: a thrust bearing sleeved on the central shaft, and the thrust bearing axially abuts against the actuator part and the inner race of the second one-way clutch. 9. The power coupling device according to claim 5, characterized in that, when the inner ring or the outer ring of the second one-way clutch is in the original state, the actuator part and the inner ring of the second one-way clutch The ring or the outer ring are offset axially, and the elastic member is always in a compressed state. 10. The power coupling device according to any one of claims 1 to 9, characterized in that, the power coupling device further comprises: a flexible disc located on the side of the rotor support facing the gearbox in the axial direction, The radially outer end of the flexible disc is fixedly connected to one axial end of the rotor support.