Hybrid power driving system and vehicle

Abstract

The utility model discloses a hybrid power driving system and a vehicle, and the hybrid power driving system comprises an engine; a driving shaft; a first motor; the second motor is in transmission connection with the driving shaft; the planetary gear mechanism comprises a first rotating part, a second rotating part and a third rotating part which can coaxially rotate, the first rotating part, the second rotating part and the third rotating part are connected with the output end of the engine, and the second rotating part is in transmission connection with the driving shaft; the third one is connected with the first motor; and the limiting unit is configured to be capable of limiting the torque of the first motor from being transmitted to the engine, and a torque transmission path is formed between the first motor and the driving shaft.

Description

Technical Field

[0001] The utility model belongs to the technical field of hybrid power drive, and in particular relates to a hybrid power drive system and a vehicle. Background Art

[0002] In the related art, the existing hybrid drive system has dual motors, one motor is used for power generation and the other motor is used for driving. The drive motor needs to meet all the requirements of pure electric drive. Therefore, the power of the drive motor is relatively large. In daily driving conditions, the load of the second motor working point is low, and it is difficult to enter the high-efficiency zone, resulting in the inability to balance power and economy. Utility Model Content

[0003] The first object of the utility model is to provide a new technical solution for a hybrid power drive system, which can at least solve the technical problem that the power and economy of existing vehicles cannot be taken into account at the same time.

[0004] The second object of the utility model is to provide a new technical solution for a vehicle.

[0005] According to a first aspect of the utility model, a hybrid power drive system is provided, comprising: an engine; a driving shaft; a first motor; a second motor, the second motor being drivingly connected to the driving shaft; a planetary gear mechanism, the planetary gear mechanism comprising a first rotating member, a second rotating member and a third rotating member that can rotate coaxially, the first of the first rotating member, the second rotating member and the third rotating member being connected to an output end of the engine, the second being drivingly connected to the driving shaft, and the third being connected to the first motor; a limiting unit, the limiting unit being configured to limit the torque of the first motor from being transmitted to the engine, and to form a torque transmission path between the first motor and the driving shaft.

[0006] Optionally, the first motor is configured as a driving element and a power generating element.

[0007] Optionally, the limiting unit is configured to be able to limit the rotation of the output end of the engine and / or the first one.

[0008] Optionally, the limiting unit is a one-way lock, and the limiting unit is suitable for cooperating with the first motor and / or the first one.

[0009] Optionally, the limiting unit is switchable between an open state and a locked state. When the limiting unit is in the open state, the output end of the engine and the first one can rotate freely. When the limiting unit is in the locked state, the limiting unit limits the rotation of the output end of the engine and / or the first one.

[0010] Optionally, the hybrid drive system further includes: a clutch assembly, which transmission connects the driving shaft and the second one, and the clutch assembly is switchable between a closed state and a released state; wherein, when the clutch assembly is in a closed state, a torque transmission path is formed between the second one and the driving shaft, and when the clutch assembly is in a released state, the torque transmission path between the second one and the driving shaft is disconnected.

[0011] Optionally, the clutch assembly includes: an intermediate shaft, the intermediate shaft having a first functional segment and a second functional segment that rotate relative to each other, the first functional segment being transmission-connected to the second segment, and the second functional segment being transmission-connected to the driving shaft; a first clutch, the first clutch being switchable between a closed state and a released state, and the first clutch being arranged on the intermediate shaft; wherein, when the first clutch is in a closed state, the first functional segment and the second functional segment are coupled, and when the first clutch is in a released state, the first functional segment and the second functional segment are decoupled.

[0012] Optionally, the hybrid drive system further comprises: a switching device, wherein the switching device is configured to controllably restrict the rotation of the third party or prevent the first party, the second party and the third party from rotating relative to each other.

[0013] Optionally, the switching device includes: a first brake, which is suitable for limiting the rotation of the third party in a closed state; and a second clutch, which is suitable for coupling any two of the first rotating member, the second rotating member and the third rotating member in a closed state so that the first rotating member, the second rotating member and the third rotating member do not rotate relative to each other.

[0014] Optionally, the first motor is connected to the third party via a first output shaft, the second clutch is disposed between the second rotating member and the first output shaft, and the first brake is disposed on the first output shaft.

[0015] Optionally, the first motor is connected to the third party via a first output shaft, the hybrid drive system further comprises a fixed member, the switching device is a synchronizer, the synchronizer is arranged on the first output shaft, and the synchronizer is movable between a first position, a second position and a third position; wherein, when the synchronizer is in the first position, the synchronizer is spaced apart from the fixed member and the planetary gear mechanism; when the synchronizer is in the second position, the synchronizer is coupled to the first member or the second member so that the first rotating member, the second rotating member and the third rotating member do not rotate relative to each other; when the synchronizer is in the third position, the synchronizer is coupled to the fixed member to limit the rotation of the third party.

[0016] Optionally, the first rotating member is configured as a planetary carrier, the second rotating member is configured as a ring gear, and the third rotating member is configured as a sun gear; wherein the planetary carrier is connected to the output end of the engine, the ring gear is transmission-connected to the driving shaft, and the sun gear is connected to the first motor.

[0017] Optionally, the first rotating member is configured as a ring gear, the second rotating member is configured as a planet carrier, and the third rotating member is configured as a sun gear; wherein the ring gear is connected to the output end of the engine, the planet carrier is transmission-connected to the driving shaft, and the sun gear is connected to the first motor.

[0018] According to a second aspect of the present invention, a vehicle is provided, comprising any one of the hybrid drive systems described above.

[0019] According to the hybrid drive system of the utility model, the torque of the first motor can be limited from being transmitted to the engine through a limiting unit, so that when the first motor rotates in the forward direction, the first of the first rotating member, the second rotating member and the third rotating member is in a stationary state, and the torque of the first motor can be efficiently transmitted to the driving shaft to rotate it. In the pure electric mode, the vehicle can be driven by the first motor and the second motor at the same time, thereby ensuring the power of the vehicle, and allowing the second motor to use a low-power motor, which is beneficial for the second motor to enter the high-efficiency zone, thereby ensuring the economy of the vehicle.

[0020] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0022] Figure 1 is a structural schematic diagram of a hybrid power drive system according to an embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of a hybrid power drive system according to an embodiment of the present utility model when driven by a single motor;

[0024] Figure 3 It is a schematic diagram of a hybrid power drive system according to an embodiment of the present utility model when driven by dual motors;

[0025] Figure 4 It is a schematic diagram of a hybrid power drive system in a series power generation mode according to an embodiment of the utility model;

[0026] Figure 5 is a schematic diagram of a hybrid power drive system in a power split mode according to an embodiment of the utility model;

[0027] Figure 6 It is a schematic diagram of a hybrid power drive system in a parallel first gear mode according to an embodiment of the utility model;

[0028] Figure 7 It is a schematic diagram of a hybrid power drive system in a parallel second gear mode according to an embodiment of the utility model;

[0029] Figure 8 is a schematic diagram of a hybrid power drive system according to an embodiment of the present utility model during braking energy recovery when the first clutch is disconnected;

[0030] Fig. 9 It is a schematic diagram of a hybrid power drive system according to an embodiment of the present utility model during braking energy recovery in a power split mode;

[0031] Fig.10 It is a schematic diagram of a hybrid power drive system according to an embodiment of the present utility model during braking energy recovery in a parallel first gear mode;

[0032] Fig.11 It is a schematic diagram of a hybrid power drive system according to an embodiment of the present utility model during braking energy recovery in a parallel second gear mode;

[0033] Fig.12 is a structural schematic diagram of a hybrid power drive system according to another embodiment of the utility model;

[0034] Fig.13 is a structural schematic diagram of a hybrid power drive system according to another embodiment of the utility model;

[0035] Fig.14 It is a structural schematic diagram of a hybrid power drive system according to another embodiment of the utility model.

[0036] Reference numerals:

[0037] 100. Hybrid drive system;

[0038] 10. Engine;

[0039] 20. driving shaft; 21. first gear; 22. second gear; 23. sixth gear;

[0040] 24. Driven gear; 25. Differential;

[0041] 30. Planetary gear mechanism; 31. First rotating member; 32. Second rotating member; 33. Third rotating member;

[0042] 40. a first motor; 41. a first output shaft;

[0043] 50. Locking member;

[0044] 60, second motor; 61, second output shaft; 611, third gear;

[0045] 70, clutch assembly; 71, intermediate shaft; 711, fourth gear; 712, fifth gear; 72, first clutch;

[0046] 80. Switching device; 81. First brake; 82. Second clutch;

[0047] 90. Cabinet. DETAILED DESCRIPTION

[0048] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0049] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0050] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0051] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0052] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0053] The hybrid power driving system 100 according to the embodiment of the present utility model is described in detail below with reference to the accompanying drawings.

[0054] like Figures 1 to 14 As shown, the hybrid driving system 100 according to the embodiment of the present invention includes an engine 10 , a driving shaft 20 , a planetary gear mechanism 30 , a first motor 40 , a limiting unit 50 and a second motor 60 .

[0055] Specifically, the second motor 60 is transmission-connected to the driving shaft 20, and the planetary gear mechanism 30 includes a first rotating member 31, a second rotating member 32 and a third rotating member 33 that can rotate coaxially. The first of the first rotating member 31, the second rotating member 32 and the third rotating member 33 is connected to the output end of the engine 10, the second is transmission-connected to the driving shaft 20, and the third is connected to the first motor 40. The limiting unit 50 is configured to limit the torque of the first motor 40 from being transmitted to the engine 10, and to form a torque transmission path between the first motor 40 and the driving shaft 20.

[0056] In other words, if Figures 1 to 14 As shown, the hybrid drive system 100 according to the embodiment of the utility model mainly includes an engine 10, a driving shaft 20, a planetary gear mechanism 30, a first motor 40 and a second motor 60, wherein the engine 10, the planetary gear mechanism 30 and the first motor 40 can be distributed along the axial direction of the first motor 40, the planetary gear mechanism 30 is located between the engine 10 and the first motor 40, the planetary gear mechanism 30 mainly includes a first rotating member 31, a second rotating member 32 and a third rotating member 33, the first rotating member 31, the second rotating member 32 and the third rotating member 33 can all rotate around the axis of the first motor 40, the first of the first rotating member 31, the second rotating member 32 and the third rotating member 33 is connected to the output end of the engine 10, the second is connected to the driving shaft 20 in a transmission connection, so that the second can drive the driving shaft 20 to rotate when rotating, and the third is connected to the first motor 40. The first end of the driving shaft 20 may be fixedly connected to a first gear 21, the first gear 21 is meshed with a driven gear 24, and the driven gear 24 is connected to a differential 25 on the wheel shaft, thereby enabling the transmission of rotational force between the driving shaft 20 and the wheel.

[0057] The setting position of the limiting unit 50 includes but is not limited to the following situations:

[0058] Case 1: the limiting unit 50 is provided on the generator 10;

[0059] Case 2: the limiting unit 50 is disposed on the first motor 40;

[0060] Case 3: the limiting unit 50 is disposed between the engine 10 and the first motor 40 .

[0061] In addition, the limiting unit 50 is configured to limit the torque of the first motor 40 from being transmitted to the engine 10, and to form a torque transmission path between the first motor 40 and the driving shaft 20, so that when the first motor 40 rotates, the output end of the engine 10 can be prevented from rotating, and the torque of the first motor 40 can be transmitted to the driving shaft 20, so that the vehicle can be driven simultaneously by the first motor 40 and the second motor 60.

[0062] Therefore, according to the hybrid drive system 100 of the embodiment of the utility model, the torque of the first motor 40 can be limited to be transmitted to the engine 10 through the setting of the limiting unit 50, so that when the first motor 40 rotates, the first of the first rotating member 31, the second rotating member 32 and the third rotating member 33 is in a stationary state, and the torque of the first motor 40 can be efficiently transmitted to the driving shaft 20 to rotate it. In the pure electric mode, the vehicle can be driven by the first motor 40 and the second motor 60 at the same time, which can ensure the power of the vehicle, and the second motor 60 can use a low-power motor, which is conducive to the second motor 60 entering the high-efficiency zone, thereby ensuring the economy of the vehicle.

[0063] In some embodiments of the present invention, the first motor 40 is configured as a driving element and a power generating element.

[0064] That is to say, the first motor 40 can not only serve as a driving component to drive the driving shaft 20 to rotate, but also serve as a power generation component to generate electricity, so that the vehicle can directly drive the first motor 40 to generate electricity through the engine 10, and can also use the first motor 40 to recover power to generate electricity.

[0065] According to an embodiment of the present invention, the limiting unit 50 is configured to limit the output end of the engine 10 and / or the first rotation.

[0066] Specifically, the limiting unit 50 has the function of limiting rotation. The limiting unit 50 can limit the rotation of the output end of the engine 10, and / or the limiting unit 50 can limit the rotation of the first rotating member 31, the second rotating member 32 and the third rotating member 33, thereby limiting the torque of the first motor 40 from being transmitted to the engine 10, and ensuring that the torque of the first motor 40 can be transmitted to the driving shaft 20.

[0067] In some embodiments of the present invention, the limiting unit 50 is a one-way lock, and the limiting unit 50 is suitable for cooperating with the first motor 40 and / or the first.

[0068] That is, the limiting unit 50 has a one-way locking function. For example, the limiting unit 50 is configured as a one-way locker (for example, a ratchet pawl structure, etc.). The setting position of the limiting unit 50 includes but is not limited to the following situations:

[0069] Case 1: The first part of the limiting unit 50 can be disposed on the main body of the engine 10, and the second part of the limiting unit 50 can be disposed on the output end of the engine 10, or on a component connected to the output end of the engine 10 (e.g., the first one connected to the generator 10), and the output end of the engine 10 can be limited from rotating in the reverse direction by the cooperation between the first part and the second part of the limiting unit 50;

[0070] Case 2: The limiting unit 50 is disposed on the external housing 90 , and the output end of the engine 10 or a component connected to the output end of the engine 10 is provided with a mating portion, and the limiting unit 50 cooperates with the mating portion to limit the output end of the engine 10 from rotating in the opposite direction.

[0071] Therefore, the locking member 50 provided can limit the reverse rotation of the output end of the engine 10, so that when the first motor 40 rotates forward, the output end of the engine 10 and the first rotating member 31 are in a stationary state, and the torque of the first motor 40 can be efficiently transmitted to the driving shaft 20 to rotate it, and there is no need to control the limiting unit 50, which has good reliability and is easy to use.

[0072] In some optional examples of the present invention, the limiting unit 50 can be switched between an open state and a locked state. When the limiting unit 50 is in the open state, the output end of the engine 10 and the first party can rotate freely. When the limiting unit 50 is in the locked state, the limiting unit 50 limits the rotation of the output end of the engine 10 and / or the first party.

[0073] Specifically, the limiting unit 50 can be a brake, the main body of the brake can be installed on the outside of the box 90 or the engine 10, the brake pad of the brake can be installed at the output end of the engine 10, the disengaged state of the brake is the open state of the limiting unit 50, and the closed state of the brake is the locked state of the limiting unit 50, so that the output end of the engine 10 can be limited or released by switching the state of the limiting unit 50.

[0074] According to one embodiment of the utility model, the hybrid drive system 100 also includes: a clutch assembly 70, the clutch assembly 70 transmission connection driving shaft 20 and the second party, the clutch assembly 70 can be switched between a closed state and a separated state, wherein, when the clutch assembly 70 is in the closed state, a torque transmission path is formed between the second party and the driving shaft 20, and when the clutch assembly 70 is in the separated state, the torque transmission path between the second party and the driving shaft 20 is disconnected.

[0075] Specifically, Figure 1 As shown, the second end of the driving shaft 20 is fixedly connected to the second gear 22, the output end of the second motor 60 is fixedly connected to the second output shaft 61, the second output shaft 61 is fixedly connected to the third gear 611, and the second gear 22 is meshed with the third bevel gear, thereby realizing the transmission connection between the rotating shaft and the second motor 60, so that the driving shaft 20 can be driven by the second motor 60, so that the vehicle can be directly driven by the second motor 60, and can also be driven by the first motor 40 and the second motor 60 together, and the power of the vehicle can be guaranteed in the pure electric mode.

[0076] Furthermore, if Figure 1As shown, the driving shaft 20 and the second motor 40 can be connected together by a clutch assembly 70, and the clutch assembly 70 has a closed state and a separated state, and the clutch assembly 70 can switch between the closed state and the separated state. When the clutch assembly 70 is in a closed state, a torque transmission path is formed between the second motor 20 and the driving shaft 20, and the torque generated by the first motor 40 can be transmitted to the driving shaft 20 through the second motor 40, so as to drive the vehicle; when the clutch assembly 70 is in a separated state, the torque transmission path between the second motor 20 and the driving shaft 20 is disconnected, and the second motor 20 cannot transmit torque, so that when the second motor 60 drives the driving shaft 20 to rotate, the planetary gear mechanism 30, the engine 10 and the first motor 40 will not rotate with the second motor 60, which can reduce the drag loss of the hybrid drive system 100, thereby reducing the energy consumption of the vehicle when it is driven by the second motor 60 in the pure electric mode.

[0077] In some specific embodiments of the present invention, the clutch assembly 70 includes: an intermediate shaft 71 and a first clutch 72, the intermediate shaft 71 has a first functional segment and a second functional segment that rotate relative to each other, the first functional segment is transmission-connected to the second segment, the second functional segment is transmission-connected to the driving shaft 20, the first clutch 72 can be switched between a closed state and a separated state, the first clutch 72 is arranged on the intermediate shaft 71, when the first clutch 72 is in a closed state, the first functional segment and the second functional segment are coupled, when the first clutch 72 is in a separated state, the first functional segment and the second functional segment are decoupled.

[0078] That is to say, Figure 1 As shown, the clutch assembly 70 mainly includes an intermediate shaft 71 and a first clutch 72, wherein the intermediate shaft 71 can be composed of a first functional section and a second functional section arranged coaxially, the first functional section and the second functional section can rotate relative to each other, the first functional section is fixedly connected with a fourth gear 711, the outer periphery of the second is provided with meshing teeth matched with the fourth gear 711, the fourth gear 711 meshes with the meshing teeth to realize the transmission connection between the second and the first functional section, the second functional section is fixedly connected with a fifth gear 712, the driving shaft 20 is fixedly connected with a sixth gear 23 matched with the fifth gear 712, the fifth gear 712 meshes with the sixth gear 23 to realize the transmission connection between the second functional section and the driving shaft 20.

[0079] like Figure 1As shown, the active part of the first clutch 72 can be set in the first functional section, and the driven part of the first clutch 72 can be set in the second functional section. The first clutch 72 has a closed state and a separated state, and the first clutch 72 can be switched between the closed state and the separated state. When the first clutch 72 is in the closed state, the active part of the first clutch 72 cooperates with the driven part, the first functional section and the second functional section are coupled, and the first functional section and the second functional section rotate synchronously, so that a torque transmission path is formed between the second and the driving shaft 20; when the first clutch 72 is in the separated state, the active part of the first clutch 72 is separated from the driven part, the first functional section and the second functional section are decoupled, the first functional section and the second functional section will not rotate with each other, and the torque transmission path between the second and the driving shaft 20 is disconnected.

[0080] According to an embodiment of the present invention, the hybrid driving system 100 further includes: a switching device 80, which is configured to controllably restrict the rotation of the third party or prevent the first party, the second party and the third party from rotating relative to each other.

[0081] like Figure 1 and Fig.12 As shown, in order to facilitate switching of the working mode of the hybrid drive system 100, the hybrid drive system 100 is also provided with a switching device 80. When in use, the switching device 80 can be used to control whether the third party rotates, and at least two of the first rotating member 31, the second rotating member 32 and the third rotating member 33 can be combined together through the switching device 80, so that the first rotating member 31, the second rotating member 32 and the third rotating member 33 do not rotate relative to each other, but rotate synchronously at the same speed. Users can switch different working modes according to actual needs.

[0082] In some specific embodiments of the present invention, the switching device 80 includes: a first brake 81 and a second clutch 82, the first brake 81 is suitable for limiting the rotation of a third party in a closed state, and the second clutch 82 is suitable for coupling any two of the first rotating member 31, the second rotating member 32 and the third rotating member 33 in a closed state, so that the first rotating member 31, the second rotating member 32 and the third rotating member 33 will not rotate relative to each other.

[0083] Specifically, Figure 1As shown, the switching device 80 mainly includes a first brake 81. The main body of the first brake 81 can be fixedly mounted on the box body 90. The brake pad of the first brake 81 is arranged and fixed on the first output shaft 41. The first brake 81 has a closed state and a separated state, and the first brake 81 can switch between the closed state and the separated state; when the first brake 81 is in the closed state, the brake caliper on the main body of the first brake 81 cooperates with the brake pad on the first output shaft 41 to limit the rotation of the first output shaft 41, thereby limiting the rotation of a third party.

[0084] like Figure 1 As shown, the switching device 80 also includes a second clutch 82, which has a closed state and a released state, and the second clutch 82 can switch between the closed state and the released state. The second clutch 82 is suitable for coupling any two of the first rotating member 31, the second rotating member 32 and the third rotating member 33 in the closed state. The coupling of the second rotating member 32 and the third rotating member 33 is taken as an example for specific description below.

[0085] like Figure 1 As shown, the active part of the second clutch 82 can be fixed to the second rotating member 32, and the driven part of the second clutch 82 can be fixedly connected to the third rotating member 33 through the first output shaft 41. When the second clutch 82 is in a closed state, the first part of the second clutch 82 cooperates with the second part to achieve the coupling of the second rotating member 32 and the first output shaft 41. Since the first output shaft 41 is fixedly connected to the third rotating member 33, the coupling of the second rotating member 32 and the third rotating member 33 can also be achieved, so that the first rotating member 31, the second rotating member 32 and the third rotating member 33 will not rotate relative to each other.

[0086] In this embodiment, the switching device 80 is composed of a second clutch 82 and a first brake 81. The working mode of the hybrid drive system 100 can be switched by switching the states of the second clutch 82 and the first brake 81. Its structure is relatively simple and easy to produce and assemble.

[0087] In some optional examples of the present invention, the first motor 40 is connected to a third party through the first output shaft 41 , the second clutch 82 is disposed between the second rotating member 32 and the first output shaft 41 , and the first brake 81 is disposed on the first output shaft 41 .

[0088] That is to say, Figure 1As shown, the output end of the first motor 40 is fixedly connected with the third party through the first output shaft 41, the active part of the second clutch 82 can be installed on the second rotating member 32, and the driven part of the second clutch 82 can be installed on the first output shaft 41. When the second clutch 82 is in a closed state, the second clutch 82 can achieve the coupling of the second rotating member 32 with the first output shaft 41, thereby achieving the coupling of the second rotating member 32 with the third rotating member 33; the brake pad of the first brake 81 can be installed on the first output shaft 41, and the main body of the first brake 81 can be installed on the box body 90. When the first brake 81 is in a closed state, the first brake 81 can limit the rotation of the first output shaft 41, thereby limiting the rotation of the third rotating member 33.

[0089] According to one embodiment of the utility model, the first motor 40 is connected to the third party through the first output shaft 41, and the hybrid drive system 100 also includes a fixed part. The switching device 80 is a synchronizer, and the synchronizer is arranged on the first output shaft 41. The synchronizer is movable between a first position, a second position and a third position, wherein when the synchronizer is in the first position, the synchronizer is spaced apart from the fixed part and the planetary gear mechanism 30, and when the synchronizer is in the second position, the synchronizer is coupled to the first or the second so that the first rotating part 31, the second rotating part 32 and the third rotating part 33 will not rotate relative to each other, and when the synchronizer is in the third position, the synchronizer is coupled to the fixed part to limit the rotation of the third party.

[0090] Specifically, Fig.12 As shown, the output end of the first motor 40 is fixedly connected with the third party through the first output shaft 41, the switching device 80 is a synchronizer, and the synchronizer is movably arranged on the first output shaft 41 between the first position, the second position and the third position along the axial direction of the first output shaft 41, and the second position and the third position are located on both sides of the first position. The synchronizer will not rotate relative to the first output shaft 41, and a first matching portion is provided on the first or the second, and a second matching portion is provided on the fixing member, wherein the fixing member is a fixed position structure, for example, the fixing member can be an external box 90 or The housing of the first motor 40, etc.; when the synchronizer is in the first position, the synchronizer is located between the first matching portion and the second matching portion and is separated from them, and the first rotating member 31, the second rotating member 32 and the third rotating member 33 can rotate relative to each other; when the synchronizer moves to the second position, the synchronizer is coupled with the first matching portion on the second or third party, so that the first rotating member 31, the second rotating member 32 and the third rotating member 33 will not rotate relative to each other; when the synchronizer moves to the third position, the synchronizer is coupled with the second matching portion on the fixed member, thereby limiting the rotation of the third party.

[0091] It should be noted that when the synchronizer itself has a moving function, the position of the synchronizer can be switched by controlling the synchronizer. In addition, the synchronizer can also be driven by an external driving structure, which can be determined according to actual conditions and will not be described in detail in this embodiment.

[0092] In this embodiment, the switching device 80 is a synchronizer with high reliability. Compared with the above-mentioned embodiment, the switching device 80 of this embodiment has a simple structure and fewer structural parts, which is conducive to subsequent assembly.

[0093] In some specific embodiments of the present invention, the first rotating member 31 is configured as a planetary carrier, the second rotating member 32 is configured as a ring gear, and the third rotating member 33 is configured as a sun gear, wherein the planetary carrier is connected to the output end of the engine 10, the ring gear is transmission-connected to the driving shaft 20, and the sun gear is connected to the first motor 40.

[0094] That is to say, Figures 1 to 11 As shown, the output end of the engine 10 is fixedly connected to the planet carrier, the ring gear is transmission-connected to the first functional section of the intermediate shaft 71, and one end of the first output shaft 41 is fixedly connected to the sun gear.

[0095] In this embodiment, when the first brake 81 and the second clutch 82 are both in the disconnected state, the engine 10, the first motor 40 and the ring gear form a power split working mode; when the first brake 81 is in the disconnected state and the second clutch 82 is in the closed state, the sun gear and the planetary carrier on the planetary gear mechanism 30 are locked, so that the rotation speeds of the sun gear, the planetary carrier and the ring gear are the same, when the first clutch 72 is in the disconnected state, the engine 10 drives the first motor 40 to generate electricity, and when the first clutch 72 is in the closed state, the engine 10 directly drives the vehicle at a first gear speed ratio; when the first brake 81 is in the closed state and the second clutch 82 is in the disconnected state, the first motor 40 and the housing 90 are fixedly connected and do not rotate, and the engine 10 directly drives the vehicle at a second gear speed ratio.

[0096] The operation modes of the hybrid drive system 100 according to the embodiment of the utility model include a pure electric single motor drive mode, a pure electric dual motor drive mode, a series power generation mode, a power split mode, a parallel first gear mode, a parallel second gear mode, and a braking energy recovery mode. The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0097] 1) When the hybrid drive system 100 is in the pure electric mode and low load operation, its mode diagram is as follows Figure 2As shown, the first clutch 72 is in a disconnected state, and the second motor 60 transmits power to the differential 25 through the second output shaft 61, the second gear 22, the third gear 611, the driving shaft 20, the first gear 21, and the driven gear 24, so that the second motor 60 drives the vehicle alone. The engine 10, the first motor 40, the planetary gear mechanism 30, the fourth gear 711, the first functional end of the intermediate shaft 71, and the active part of the first clutch 72 are all kept stationary.

[0098] 2) When the hybrid drive system 100 is in pure electric mode and high load operation, its mode diagram is as follows: Figure 3 As shown, the first clutch 72 is in a closed state, the locking member 50 is in a locked state, the engine 10 is stopped, the planet carrier is fixed, and the second clutch 82 and the first brake 81 are both in a disconnected state. The first motor 40 transmits power to the differential 25 through the first motor 40 shaft, the sun gear, the ring gear, the intermediate shaft 71, the driving shaft 20, the first gear 21, and the driven gear 24, and the second motor 60 transmits power to the differential 25 through the second output shaft 61, the second gear 22, the third gear 611, the driving shaft 20, the first gear 21, and the driven gear 24, so that the first motor 40 and the second motor 60 drive the vehicle together.

[0099] 3) When the hybrid drive system 100 is in the series power generation mode, its mode diagram is as follows: Figure 4 As shown, the first clutch 72 is in a disconnected state, the output end of the engine 10 can rotate freely in the forward direction, the second clutch 82 is in a closed state, the first brake 81 is in a disconnected state, the sun gear of the planetary gear mechanism 30 is locked with the planet carrier, so that the sun gear, the planet carrier and the ring gear have the same rotation speed, and the engine 10 drives the first motor 40 to generate electricity. The second motor 60 transmits power to the differential 25 through the second output shaft 61, the second gear 22, the third gear 611, the driving shaft 20, the first gear 21, and the driven gear 24, and the vehicle is driven by the second motor 60.

[0100] 4) When the hybrid drive system 100 is in the power split mode, its mode diagram is as follows: Figure 5 As shown, the first clutch 72 is in a closed state, the output end of the engine 10 can rotate freely in the forward direction, and the second clutch 82 and the first brake 81 are both in a disconnected state (or, when the synchronizer is in the first position). The engine 10 drives the vehicle through the planetary carrier, the ring gear, the intermediate shaft 71, the driving shaft 20 and the differential 25. At the same time, the engine 10 drives the first motor 40 through the planetary carrier and the sun gear, so that the first motor 40 generates electricity, and the second motor 60 selectively drives or generates electricity to participate in the work.

[0101] 5) When the hybrid drive system 100 is in the parallel first gear mode, its mode diagram is as follows: Figure 6 As shown. The first clutch 72 is in a closed state, the output end of the engine 10 can rotate freely in the forward direction, the second clutch 82 is in a closed state, the first brake 81 is in a disconnected state (or, the synchronizer is in the second position), and the sun gear of the planetary gear mechanism 30 is locked with the planet carrier, so that the sun gear, the planet carrier and the ring gear have the same speed, and the engine 10 directly drives (or parallels) the first gear. When the torque in the high-efficiency zone of the engine 10 does not meet the wheel side requirements, the first motor 40 and the second motor 60 assist and drive the vehicle together with the engine 10; when the torque in the high-efficiency zone of the engine 10 exceeds the wheel side requirements, the first motor 40 and the second motor 60 generate electricity to charge the battery pack. The first motor 40 and the second motor 60 "peak shaving and valley filling" of the torque enable the engine 10 to operate in the high-efficiency zone.

[0102] 6) When the hybrid drive system 100 is in the parallel second gear mode, its mode diagram is as follows: Figure 7 As shown. The first clutch 72 is in a closed state, the output end of the engine 10 can rotate freely in the forward direction, the second clutch 82 is in a disconnected state, the first brake 81 is in a closed state (or, the synchronizer is in the third position), the sun gear and the first motor 40 are locked and fixed with the housing 90 and do not participate in the work, and the engine 10 realizes direct drive (or parallel) second gear through the planetary carrier and the ring gear, and realizes a transmission speed ratio different from the parallel first gear. When the torque in the high-efficiency zone of the engine 10 does not meet the wheel side requirements, the second motor 60 assists and drives the vehicle together with the engine 10; when the torque in the high-efficiency zone of the engine 10 exceeds the wheel side requirements, the second motor 60 generates electricity to charge the battery pack. The second motor 60 enables the engine 10 to work in the high-efficiency zone by "peak shaving and valley filling" of the torque.

[0103] 7) When the hybrid drive system 100 is in the braking energy recovery mode, based on the opening and closing states of the first clutch 72, the second clutch 82 and the first brake 81, there are the following four different braking energy recovery situations:

[0104] a) When the first clutch 72 is in the disconnected state, the second motor 60 generates negative torque to recover kinetic energy to the power battery. The schematic diagram of the mode is as follows: Figure 8 The engine 10 may be in a stopped or idling state, and the vehicle may be in a pure electric or series mode before braking. When the brake is applied, the vehicle may enter this braking energy recovery state;

[0105] b) When the first clutch 72 is in the closed state, and the second clutch 82 and the first brake 81 are both in the open state, the second motor 60 generates negative torque to recover kinetic energy to the power battery, and a part of the energy is transmitted to the engine 10 through the planetary gear mechanism 30 to overcome the reverse drag of the engine 10. The schematic diagram of the mode is shown in FIG. Fig. 9Before braking, the vehicle is in power split mode, and braking will enter this braking energy recovery state.

[0106] c) When the first clutch 72 is in the closed state, the second clutch 82 is in the closed state, and the first brake 81 is in the open state, the second motor 60 generates negative torque to recover kinetic energy to the power battery, and a part of the energy is transmitted to the engine 10 through the planetary gear mechanism 30 to overcome the reverse drag of the engine 10. The schematic diagram of the mode is shown in Figure 11. Before braking, the vehicle is in the direct drive first gear mode, and stepping on the brake will enter this braking energy recovery state.

[0107] d) When the first clutch 72 is in the closed state, the second clutch 82 is in the open state, and the first brake 81 is in the closed state, the second motor 60 generates negative torque to recover kinetic energy to the power battery, and a part of the energy is transmitted to the engine 10 through the planetary gear mechanism 30 to overcome the reverse drag of the engine 10. The schematic diagram of the mode is shown in Figure 12. Before braking, the vehicle is in the direct drive second gear mode, and stepping on the brake will enter this braking energy recovery state.

[0108] Therefore, according to the hybrid drive system 100 of the embodiment of the utility model, when the vehicle power demand is very high, the first motor 40 and the second motor 60 are driven together, which can reduce the power and torque of a single drive motor, reduce the cost of the whole vehicle, improve the electric drive efficiency, and take into account the power and economy of the whole vehicle; and the engine 10 has two gears (parallel first gear and parallel second gear) for speed regulation, and can enter parallel at a lower speed. When the discharge power of the battery pack meets the motor demand, the power of the whole vehicle is further improved; at the same time, the high-efficiency area of ​​the engine 10 covers a wider speed range, thereby improving the economy of the whole vehicle.

[0109] like Fig.13 and Fig.14 As shown, according to one embodiment of the utility model, the first rotating member 31 is configured as a ring gear, the second rotating member 32 is configured as a planet carrier, and the third rotating member 33 is configured as a sun gear; wherein, the ring gear is connected to the output end of the engine 10, the planet carrier is transmission-connected to the driving shaft 20, and the sun gear is connected to the first motor 40.

[0110] That is, the output end of the engine 10 is fixedly connected to the ring gear, the planet carrier is transmission-connected to the first functional section of the intermediate shaft 71, and one end of the first output shaft 41 is fixedly connected to the sun gear.

[0111] The functions and working modes of the hybrid drive system 100 according to the embodiment of the utility model are the same as those of the above-mentioned embodiment, including pure electric single motor drive, pure electric dual motor drive, series power generation, power splitting, parallel engine 10 two gears, and braking energy recovery working modes.

[0112] In this embodiment, the second clutch 82 is in a disconnected state, the first brake 81 is in a closed state, the sun gear and the first motor 40 are locked and fixed with the housing 90 and do not participate in the work, the speed of the engine 10 is higher than the speed of the planetary carrier, and the engine 10 is directly driven (or in parallel) in the first gear through the ring gear and the planetary carrier; the second clutch 82 is in a closed state, the first brake 81 is in a disconnected state, the sun gear and the planetary carrier of the planetary gear mechanism 30 are locked, so that the speeds of the sun gear, the planetary carrier and the ring gear are the same, the speed of the engine 10 is the same as the speed of the planetary carrier, and the engine 10 is directly driven (or in parallel) in the second gear.

[0113] In summary, according to the hybrid drive system 100 of the embodiment of the utility model, the torque of the first motor 40 can be limited from being transmitted to the engine 10 by the setting of the limiting unit 50, so that when the first motor 40 rotates in the forward direction, the first of the first rotating member 31, the second rotating member 32 and the third rotating member 33 is in a stationary state, and the torque of the first motor 40 can be efficiently transmitted to the driving shaft 20 to rotate it. In the pure electric mode, the vehicle can be driven by the first motor 40 and the second motor 60 at the same time, which can ensure the power of the vehicle, and the second motor 60 can use a low-power motor, which is beneficial for the second motor 60 to enter the high-efficiency zone, thereby ensuring the economy of the vehicle.

[0114] The embodiment of the utility model further provides a vehicle, comprising the hybrid power drive system 100 described in any of the above embodiments. Since the hybrid power drive system 100 according to the embodiment of the utility model has the above technical effects, the vehicle according to the embodiment of the utility model also has the above technical effects, which will not be described in detail in this embodiment.

[0115] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A hybrid power drive system, characterized in that: include: engine; Active shaft; First motor; A second motor, the second motor is drivingly connected to the driving shaft; a planetary gear mechanism, the planetary gear mechanism comprising a first rotating member, a second rotating member and a third rotating member that can rotate coaxially, wherein a first one of the first rotating member, the second rotating member and the third rotating member is connected to an output end of the engine, a second one is drivingly connected to the driving shaft, and the third one is connected to the first motor; A limiting unit is configured to limit the torque of the first motor from being transmitted to the engine and form a torque transmission path between the first motor and the driving shaft.

2. The hybrid drive system according to claim 1, characterized in that: The first motor is configured as a driving element and a power generating element.

3. The hybrid drive system according to claim 1, characterized in that: The limiting unit is configured to be capable of limiting the output end of the engine and / or the first one from rotating.

4. The hybrid drive system according to claim 1, characterized in that: The limiting unit is a one-way lock, and the limiting unit is suitable for cooperating with the first motor and / or the first one.

5. The hybrid drive system according to claim 1, characterized in that: The limiting unit is switchable between an open state and a locked state. When the limiting unit is in an open state, the output end of the engine and the first one can rotate freely. When the limiting unit is in a locked state, the limiting unit limits the rotation of the output end of the engine and / or the first one.

6. The hybrid drive system according to claim 1, characterized in that: Also includes: A clutch assembly, the clutch assembly transmission-connecting the driving shaft and the second one, the clutch assembly being switchable between a closed state and a disengaged state; Wherein, when the clutch assembly is in a closed state, a torque transmission path is formed between the second one and the driving shaft, and when the clutch assembly is in a disengaged state, the torque transmission path between the second one and the driving shaft is disconnected.

7. The hybrid drive system according to claim 6, characterized in that: The clutch assembly comprises: An intermediate shaft, the intermediate shaft having a first functional section and a second functional section that rotate relative to each other, the first functional section being transmission-connected to the second section, and the second functional section being transmission-connected to the driving shaft; a first clutch, the first clutch being switchable between a closed state and a released state, the first clutch being arranged on the intermediate shaft; When the first clutch is in a closed state, the first functional segment is coupled to the second functional segment, and when the first clutch is in a disengaged state, the first functional segment is decoupled to the second functional segment.

8. The hybrid drive system according to claim 1, characterized in that: Also includes: A switching device is configured to controllably restrict the third party from rotating or prevent the first party, the second party and the third party from rotating relative to each other.

9. The hybrid drive system according to claim 8, characterized in that: The switching device comprises: a first brake, wherein the first brake is adapted to restrict the third party from rotating in a closed state; The second clutch is adapted to couple any two of the first rotating member, the second rotating member and the third rotating member in a closed state so that the first rotating member, the second rotating member and the third rotating member will not rotate relative to each other.

10. The hybrid drive system according to claim 9, characterized in that: The first motor is connected to the third party via a first output shaft, the second clutch is arranged between the second rotating member and the first output shaft, and the first brake is arranged on the first output shaft.

11. The hybrid drive system according to claim 8, characterized in that: The first motor is connected to the third party via a first output shaft, the hybrid drive system further comprises a fixing member, the switching device is a synchronizer, the synchronizer is arranged on the first output shaft, and the synchronizer is movable between a first position, a second position and a third position; Wherein, when the synchronizer is located at the first position, the synchronizer is spaced apart from the fixing member and the planetary gear mechanism; When the synchronizer is located at the second position, the synchronizer is coupled with the first or the second so that the first rotating member, the second rotating member and the third rotating member do not rotate relative to each other; When the synchronizer is located at the third position, the synchronizer is coupled to the fixed member to restrict the third party from rotating.

12. The hybrid drive system according to any one of claims 1 to 11, characterized in that: The first rotating member is configured as a planet carrier, the second rotating member is configured as a ring gear, and the third rotating member is configured as a sun gear; Wherein, the planet carrier is connected to the output end of the engine, the ring gear is transmission-connected to the driving shaft, and the sun gear is connected to the first motor.

13. The hybrid drive system according to any one of claims 1 to 11, characterized in that: The first rotating member is configured as a ring gear, the second rotating member is configured as a planet carrier, and the third rotating member is configured as a sun gear; Wherein, the ring gear is connected to the output end of the engine, the planet carrier is transmission-connected to the driving shaft, and the sun gear is connected to the first motor.

14. A vehicle, characterized in that: A hybrid drive system comprising the hybrid drive system according to any one of claims 1 to 13.

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