Transmission, powertrain, and vehicle

Abstract

The application relates to a transmission, a power assembly and a vehicle. The transmission comprises a planetary mechanism, a first shaft connected with the planetary carrier and an engine, a locking disc arranged opposite to the sun gear, a second shaft coaxially arranged with the first shaft and arranged on the side of the planetary mechanism away from the first shaft, a shifting mechanism assembled on the second shaft and comprising a first part and a second part connected with each other, the first part being used for connecting a first motor, and the second part being arranged in the planetary mechanism and used for switching the matching relationship between the sun gear and the locking disc or the planetary carrier, a third shaft arranged at intervals with the first shaft, and a gear assembly assembled on the third shaft and selectively matched with the ring gear. In this way, the planetary mechanism can be used as a reduction mechanism, a fixed gear or realize a power split function, the partial transmission function is adjusted to the planetary mechanism, the setting of external speed regulating gears is reduced, and the structure of the reducer is simplified and the volume of the reducer is reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more specifically, to transmissions, powertrains, and vehicles. Background Technology

[0002] Currently, in hybrid transmissions for vehicles, planetary mechanisms generally only have two working states: power splitting and direct engine drive. The gear shifting function is achieved through multiple sets of gears outside the planetary mechanism, which results in a large number of parts, complex structure, and large size. Utility Model Content

[0003] This application provides a transmission and powertrain to solve the aforementioned technical problems.

[0004] The embodiments of this application are implemented as follows: A transmission includes: a planetary mechanism including a sun gear, a planet carrier, and a ring gear; a first shaft connected at one end to the planet carrier and at the other end to an engine; a locking disc disposed opposite to the sun gear and fixed in a preset position; a second shaft coaxially disposed with the first shaft and located on the side of the planetary mechanism away from the first shaft; a shifting mechanism mounted on the second shaft, the shifting mechanism including a first part and a second part connected to each other, the first part being used to connect to a first motor, and the second part being disposed within the planetary mechanism for switching the engagement relationship between the sun gear and the locking disc or the planet carrier; a third shaft spaced apart from the first shaft; and a transmission gear assembly mounted on the third shaft, the transmission gear assembly being selectively engaged with the ring gear.

[0005] The transmission of this application sets up a shifting mechanism inside the planetary mechanism to switch the engagement relationship between the sun gear and the locking disc or planet carrier, so that the planetary mechanism can be used as a reduction mechanism, a fixed gear, or to realize the power splitting function. Some of the speed change function is adjusted to the planetary mechanism, which works in conjunction with the speed change gear assembly to realize multi-gear speed regulation, reduce the number and structure of external speed regulating gears, and help to simplify the reducer structure and reduce the size of the reducer.

[0006] Specifically, when the second part of the shift mechanism engages with the sun gear and locking disc drive, the sun gear and locking disc remain relatively fixed. The planetary mechanism can then function as a reduction mechanism, and the engine's output power can be transmitted and output via the planetary carrier, ring gear, and transmission gear assembly. When the second part of the shift mechanism engages with the sun gear drive, the sun gear and the first motor can be connected via the second shaft. In this case, the planetary mechanism can achieve power splitting; a portion of the engine's output power can be distributed to the sun gear and the first motor via the planetary carrier, while the remaining power is transmitted and output via the ring gear and transmission gear assembly. When the second part of the shift mechanism engages with the sun gear and planetary carrier drive, keeping the sun gear and planetary carrier relatively fixed, the planetary mechanism can function as a fixed gear. The engine's output power is then output via the planetary carrier, ring gear, and transmission gear assembly at a different speed ratio (transmission ratio).

[0007] In one possible implementation: the locking disc has a first mating structure, the sun gear has a second mating structure, and the planet carrier has a third mating structure. When the shifting mechanism is in the first state, the second part is connected to both the first and second mating structures, and the sun gear is relatively fixed to the locking disc. When the shifting mechanism is in the second state, the second part is connected to the second mating structure for power transmission between the sun gear and the first motor. When the shifting mechanism is in the third state, the second part is connected to both the second and third mating structures, and the sun gear is relatively fixed to the planet carrier.

[0008] In one possible implementation: the transmission further includes a first drive gear and a synchronizer. The first drive gear is mounted on a first shaft and connected to a gear ring. The diameter of the first drive gear is different from the diameter of the gear ring. The gear assembly includes a first gear and a second gear with different diameters. The first gear is correspondingly arranged with the first drive gear, and the second gear is correspondingly arranged with the gear ring. The synchronizer is mounted between the first gear and the second gear and is used to switch the transmission engagement relationship between the first gear and the first drive gear, and to switch the transmission engagement relationship between the second gear and the gear ring.

[0009] In one possible implementation: the gear shift assembly further includes a first synchronized position, a second synchronized position, and a third synchronized position. When the synchronizer is in the first synchronized position, the first gear shifts into contact with the first drive gear, and the second gear shifts out of contact with the ring gear. When the synchronizer is in the second synchronized position, the second gear shifts into contact with the ring gear, and the first gear shifts out of contact with the first drive gear. When the synchronizer is in the third synchronized position, the gear shift assembly is no longer engaged with either the ring gear or the first drive gear.

[0010] In one possible implementation: the transmission further includes a first speed regulating gear mechanism, mounted on the third shaft, the first speed regulating gear mechanism being spaced apart from the transmission gear assembly, and the first speed regulating gear mechanism being used to connect to the second motor.

[0011] In one possible implementation: the transmission further includes a fourth shaft, a differential, a second drive gear, and a second speed regulating gear mechanism. The fourth shaft is spaced apart from the third shaft on the side away from the first shaft. The differential is driven by the transmission gear assembly. The second drive gear is mounted on the fourth shaft and is driven by the differential. The second speed regulating gear mechanism is mounted on the fourth shaft and the third shaft, and is located between the transmission gear assembly and the first speed regulating gear mechanism; the second speed regulating gear mechanism is driven by the differential.

[0012] In one possible implementation: the transmission further includes a one-way clutch disposed on the first shaft, and the one-way clutch is spaced apart on the side of the planetary mechanism away from the shift mechanism.

[0013] In one possible implementation: the shifting mechanism includes a first clutch and a second clutch. A portion of the first clutch is used to connect to a first motor, and another portion is used to switch the transmission connection between the locking disc and the sun gear. A portion of the second clutch is used to connect to the first motor, and another portion is used to switch the transmission connection between the sun gear and the planet carrier.

[0014] Embodiments of this application also provide a powertrain, including the transmission, engine, first motor, and second motor described in the above embodiments. The engine is connected to a first shaft of the transmission. The first motor is connected to the shift mechanism of the transmission. The second motor is connected to the transmission gear assembly.

[0015] Embodiments of this application also provide a vehicle, including a body and the powertrain described in the above embodiments, the powertrain being disposed on the body. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a powertrain structure with a transmission according to an embodiment of this application.

[0018] Figure 2 for Figure 1 The diagram shows the structure in another state.

[0019] Figure 3 for Figure 1 The diagram shows the structure in another state.

[0020] Figure 4 This is a schematic diagram of a powertrain structure with a transmission according to another embodiment of this application.

[0021] Figure 5 This is a structural schematic diagram of a vehicle in one embodiment.

[0022] Explanation of key component symbols: Powertrain 100 Engine 1 One-way clutch 2 First driving gear 3 Planetary mechanism 4 Sun Chakra 41 Gear ring 42 Planetary Carrier 43 Locking disc 5 First motor 6 Gear shifting mechanism 7 Part 1, Chapter 71 Part 2, 72 First Clutch 701 Second clutch 702 Second motor 8 First speed regulating gear mechanism 9 First speed regulating drive gear 91 First speed regulating driven gear 92 Second gear 10 Second speed regulating gear mechanism 11 Second speed regulating drive gear 111 Second speed regulating driven gear 112 Second drive gear 12 Differential 13 Synchronizer 14 First gear 15 Transmission gear assembly 16 First Axis 101 Second axis 102 Third axis 103 Fourth axis 104 200 vehicles Body 201 The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0023] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0024] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] See Figures 1 to 4This application provides a transmission, including a planetary mechanism 4, a first shaft 101, a locking disc 5, a second shaft 102, a shifting mechanism 7, a third shaft 103, and a transmission gear assembly 16. The planetary mechanism 4 includes a sun gear 41, a planet carrier 43 (containing planetary gears), and a ring gear 42. The sun gear 41 engages with the inner side of the planet carrier 43, and the ring gear 42 engages with the outer side of the planet carrier 43. One end of the first shaft 101 is connected to the planet carrier 43, and the other end is used to connect to an engine 1. The locking disc 5 is disposed opposite to the sun gear 41 and is fixed in a preset position. This preset position can be located on the transmission housing, or at a certain position within the cavity of the transmission housing, allowing the locking disc 5 to be directly connected to the transmission housing, or indirectly connected via other adapters; this application is not limited to this. The second shaft 102 is coaxially disposed with the first shaft 101, and the second shaft 102 is located on the side of the planetary mechanism 4 away from the first shaft 101. The shifting mechanism 7 is mounted on the second shaft 102. The shifting mechanism 7 includes a first part 71 and a second part 72 connected to each other. The first part 71 is used to connect the first motor 6, and the second part 72 is disposed within the planetary mechanism 4, used to switch the engagement relationship between the sun gear 41 and the locking disc 5 or the planet carrier 43. The third shaft 103 is spaced apart from the first shaft 101. The transmission gear assembly 16 is mounted on the third shaft 103, and the transmission gear assembly 16 selectively engages with the ring gear 42.

[0028] The transmission of this application, by setting a partial shifting mechanism 7 inside the planetary mechanism 4, switches the engagement relationship between the sun gear 41 and the locking disc 5 or the planet carrier 43, so that the planetary mechanism 4 can be used as a reduction mechanism, a fixed gear, or to realize the power splitting function. Part of the speed change function is adjusted to the planetary mechanism 4, which works in conjunction with the speed change gear assembly 16 to realize multi-gear speed regulation, reduce the number and structure of external speed regulating gears, and help simplify the reducer structure and reduce the size of the reducer.

[0029] Specifically, when the second part 72 of the shift mechanism 7 is switched to drive engagement with the sun gear 41 and the locking disc 5, the sun gear 41 and the locking disc 5 can remain relatively fixed. The planetary mechanism 4 can act as a reduction mechanism, and the power output from the engine 1 can be transmitted and output through the planetary carrier 43, the ring gear 42, and the transmission gear assembly 16. When the second part 72 of the shift mechanism 7 is switched to drive engagement with the sun gear 41, the sun gear 41 and the first motor 6 can be connected through the second shaft 102. At this time, the planetary mechanism 4 can realize the power splitting function. The power output from the engine 1 can be distributed partly to the sun gear 41 and the first motor 6 through the planetary carrier 43, and the other part of the power can be transmitted and output through the ring gear 42 and the transmission gear assembly 16. When the second part 72 of the shift mechanism 7 is switched to drive engagement with the sun gear 41 and the planet carrier 43, and the sun gear 41 and the planet carrier 43 are kept relatively fixed, the planetary mechanism 4 can be used as a fixed gear, and the power output by the engine 1 is output at another speed ratio (transmission ratio) through the planet carrier 43, the ring gear 42 and the transmission gear assembly 16.

[0030] In some implementations, such as Figures 1 to 4 As shown, the locking disc 5 has a first mating structure A, the sun gear 41 has a second mating structure B, and the planet carrier 43 has a third mating structure C. Specifically, the first mating structure A is located on the inner ring of the locking disc 5, the second mating structure B is located on the inner ring of the sun gear 41, and the third mating structure C is located on the inner side of the planet carrier 43. The first mating structure A, the second mating structure B, and the third mating structure C are arranged side by side and coaxially along the extension direction of the first shaft 101, so that the second part 72 of the shifting mechanism 7 can move smoothly among the three to achieve different transmission mating relationships.

[0031] When the shift mechanism 7 is in the first state, the second part 72 is connected to the first mating structure A and the second mating structure B, and the sun gear 41 is fixed relative to the locking disc 5. In the embodiments of this application, the locking disc 5 can be fixedly connected to the transmission housing, thus locking the sun gear 41, and the power output by the engine 1 is not transmitted through the sun gear 41. At this time, the planetary mechanism 4 can serve as a reduction mechanism. The power output by the engine 1 is transmitted to the ring gear 42 through the planet carrier 43, achieving initial deceleration and transmitting the power to the transmission gear assembly 16, which then outputs power at different speed ratios (transmission ratios).

[0032] When the shift mechanism 7 is in the second state, the second part 72 is connected to the second mating structure B for transmission connection between the sun gear 41 and the first motor 6. At this time, the sun gear 41 is not locked and can rotate with the planetary carrier 43, and the planetary mechanism 4 can realize the power splitting function. That is, part of the power output by the engine 1 is transmitted from the planetary carrier 43 to the sun gear 41, and the sun gear 41 drives the first motor 6 to rotate through the shift mechanism 7, so that the first motor 6 can generate electricity, which can power other components of the vehicle 200 or charge the battery of the vehicle 200. The other part of the power output by the engine 1 is transmitted from the planetary carrier 43 to the ring gear 42, and then to the transmission gear assembly 16, and then output by the transmission gear assembly 16 at different speed ratios (transmission ratios).

[0033] When the shift mechanism 7 is in the third state, the second part 72 is connected to the second mating structure B and the third mating structure C, and the sun gear 41 is relatively fixed to the planet carrier 43. At this time, the positions of the planetary gears, sun gear 41, and ring gear 42 on the planet carrier 43 are relatively fixed, and the planetary mechanism 4 can be used as a fixed gear. The power output by the engine 1 is transmitted from the planet carrier 43 to the ring gear 42, and then to the transmission gear assembly 16, which outputs power at different speed ratios (transmission ratios).

[0034] In the embodiments of this application, the shifting mechanism 7 may be, but is not limited to, a dog clutch, a synchronizer 14, or other structures with shifting functions. A set of dog clutches may be provided, one part of which is connected to the first motor 6, and the other part can switch the transmission connection relationship between the first mating structure A, the second mating structure B, and the third mating structure C.

[0035] Please see Figure 1-4In other embodiments, the shifting mechanism 7 may include a first clutch 701 and a second clutch 702. The first clutch 701 and the second clutch 702 may be, but are not limited to, dog clutches. A portion of the first clutch 701 (the first part of the first clutch 701) is used to connect the first motor 6, and the other portion (the second part of the first clutch 701) can switch the transmission connection between the first mating structure A of the sun gear 41 and the second mating structure B of the locking disc 5, thereby connecting the sun gear 41 and the locking disc 5, or connecting the sun gear 41 and the first motor 6. A portion of the second clutch 702 (the first part of the second clutch 702) is used to connect the first motor 6, and the other portion (the second part of the second clutch 702) can switch the transmission connection between the second mating structure B of the locking disc 5 and the third mating structure C of the planetary carrier 43, thereby connecting the first motor 6 and the planetary carrier 43 without engaging the sun gear 41, or connecting the sun gear 41 and the planetary carrier 43, thus achieving the same function as in the above embodiments. The first clutch 701 and the second clutch 702 work together to satisfy the transmission relationship between the locking disc 5, the sun gear 41, and the planet carrier 43 under different states. This application is not limited to this.

[0036] In some implementations, such as Figures 1 to 4 As shown, the transmission also includes a first drive gear 3, which is mounted on the first shaft 101 and connected to a gear ring 42. The diameter of the first drive gear 3 is different from the diameter of the gear ring 42. In the embodiments of this application, the diameter of the first drive gear 3 is smaller than the diameter of the gear ring 42. In other embodiments, the diameter of the first drive gear 3 can also be larger than the diameter of the gear ring 42, as long as different gear shifting requirements are met; this application is not limited to this. The gear shifting assembly 16 includes a first gear shifting gear 15 and a second gear shifting gear 10 with different diameters. The first gear shifting gear 15 is correspondingly arranged with the first drive gear 3, and the second gear shifting gear 10 is correspondingly arranged with the gear ring 42. In the embodiments of this application, the diameter of the first gear shifting gear 15 is larger than the diameter of the second gear shifting gear 10. In other embodiments, the diameter of the first gear shifting gear 15 can also be smaller than the diameter of the second gear shifting gear 10, and the diameters of the gear ring 42 and the first drive gear 3 are also adjusted accordingly to meet different gear shifting requirements; this application is not limited to this. The transmission also includes a synchronizer 14, which is mounted between the first gear 15 and the second gear 10. The synchronizer 14 is used to switch the transmission engagement relationship between the first gear 15 and the first drive gear 3, and to switch the transmission engagement relationship between the second gear 10 and the gear ring 42, thereby achieving different speed ratios (transmission ratios) of output.

[0037] In some embodiments, the gear assembly 16 further includes a first synchronization position F, a second synchronization position D, and a third synchronization position E. Specifically, the first synchronization position F is located on the side of the first gear 15 facing the second gear 10. The second synchronization position D is located on the side of the second gear 10 facing the first gear 15. The third synchronization position E is located between the first synchronization position F and the second synchronization position D.

[0038] When synchronizer 14 is in the first synchronized position F, the first gear 15 meshes with the first drive gear 3, and the second gear 10 disengages from the ring gear 42. At this time, the power output via the ring gear 42 is transmitted to the first gear 15 through the first drive gear 3, outputting at a fixed speed ratio (transmission ratio). When synchronizer 14 is in the second synchronized position D, the second gear 10 meshes with the ring gear 42, and the first gear 15 disengages from the first drive gear 3. At this time, the power output via the ring gear 42 is output through the second drive gear 12 at another fixed speed ratio (transmission ratio). When synchronizer 14 is in the third synchronized position E, the gear assembly 16 disengages from the ring gear 42 and the first drive gear 3. At this time, the power output by engine 1 cannot be transmitted to gear assembly 16 through planetary mechanism 4. This is suitable for the engine 1 starting phase, preventing the impact force during starting from being transmitted to the wheels, thus reducing starting vibration of vehicle 200 and improving the user experience.

[0039] In some implementations, such as Figures 1 to 4 As shown, the transmission also includes a first speed regulating gear mechanism 9, which is mounted on the third shaft 103. The first speed regulating gear mechanism 9 is spaced apart from the transmission gear assembly 16 and is used to connect the second motor 8. Thus, the second motor 8 can be driven to the transmission gear assembly 16 via the first speed regulating gear mechanism 9 and the third shaft 103. In electric drive mode, the second motor 8 acts as the power source, outputting power to the transmission gear assembly 16 and transmitting power to the wheels.

[0040] In one embodiment, the first speed-regulating gear mechanism 9 includes a first speed-regulating driving gear 91 and a first speed-regulating driven gear 92. The diameter of the first speed-regulating driven gear 92 is larger than the diameter of the first speed-regulating driving gear 91 to achieve a speed reduction function. The first speed-regulating driving gear 91 is connected to the output shaft of the second motor 8, and the first speed-regulating driven gear 92 is mounted on the third shaft 103 and meshes with the first speed-regulating driving gear 91. The power output by the high-speed rotation of the second motor 8 is transmitted to the first speed-regulating driven gear 92 through the first speed-regulating driving gear 91 to reduce the speed, and then transmitted to the speed-changing gear assembly 16 through the third shaft 103.

[0041] In non-electric drive mode, when the power output from engine 1 is transmitted to transmission gear assembly 16 via planetary mechanism 4, transmission gear assembly 16 can drive second motor 8 to rotate via coaxially arranged first speed regulating gear mechanism 9. Second motor 8 can generate electricity, drive, or not output torque as needed. In other embodiments, when there is a speed increase requirement, the diameter of first speed regulating driven gear 92 can be set to be smaller than the diameter of first speed regulating driving gear 91 to meet design requirements; this application is not limited to this.

[0042] In some implementations, such as Figures 1 to 4 As shown, the transmission also includes a fourth shaft 104, a differential 13, a second drive gear 12, and a second speed regulating gear mechanism 11. The fourth shaft 104 is spaced apart from the third shaft 103 on the side away from the first shaft 101. The differential 13 is driven by the transmission gear assembly 16. The second drive gear 12 is mounted on the fourth shaft 104 and is driven by the differential 13. The second speed regulating gear mechanism 11 is mounted on the fourth shaft 104 and the third shaft 103, and is located between the transmission gear assembly 16 and the first speed regulating gear mechanism 9. The second speed regulating gear mechanism 11 is driven by the differential 13. Thus, on the one hand, the power transmitted by the transmission gear assembly 16 can be transmitted to the differential 13 through the second speed regulating gear mechanism 11 to drive the wheels; on the other hand, the second motor 8 can also output power to the differential 13 through the first speed regulating gear mechanism 9, the third shaft 103, the second speed regulating gear mechanism 11, and the fourth shaft 104 to drive the wheels to rotate.

[0043] In one embodiment, the second speed-regulating gear mechanism 11 includes a second speed-regulating driving gear 111 and a second speed-regulating driven gear 112. The diameter of the second speed-regulating driving gear 111 is smaller than the diameter of the second speed-regulating driven gear 112 to meet the deceleration requirement. In other embodiments, when there is a speed-increasing requirement, the diameter of the second speed-regulating driving gear 111 can also be set to be larger than the diameter of the second speed-regulating driven gear 112, and this application is not limited thereto.

[0044] In the embodiments of this application, the first shaft 101, the third shaft 103, and the fourth shaft 104 are arranged approximately in parallel, and a parallelism error within 2° is considered parallel. The connection relationship described in the embodiments of this application can be a direct connection or an indirect transmission connection, as long as it meets the design requirements; this application is not limited to this.

[0045] In some implementations, such as Figures 1 to 4As shown, the transmission also includes a one-way clutch 2, which is located on the first shaft 101 and spaced apart from the planetary mechanism 4 on the side away from the shift mechanism 7. Specifically, the one-way clutch 2 can be located at the output end of the engine 1. Thus, when the first motor 6 is used as a drive motor and reverses, the one-way clutch 2 locks, and the torque output by the first motor 6 is not transmitted to the engine 1, but is transmitted to the wheels through the planetary mechanism 4, the transmission gear assembly 16, etc., to achieve drive. The first motor 6 can also work in conjunction with the second motor 8 to jointly achieve wheel drive function. This allows the driving capability of the entire vehicle to not be completely dependent on the engine 1, improving the overall driving capability of the vehicle 200.

[0046] Please refer to it again. Figures 1 to 4 This application also provides a powertrain 100, including the transmission, engine 1, and first motor 6 described in the above embodiments. The engine 1 is connected to the first shaft 101 of the transmission. The output shaft of the engine 1 can be directly connected to the first shaft 101, or it can be connected via a coupling or other structure for intermittent transmission; this application is not limited to this. The first motor 6 is connected to the shift mechanism 7 of the transmission. The output shaft of the first motor 6 can be connected to the shift mechanism 7 via a second shaft 102, or the output shaft of the first motor 6 can be used as the second shaft 102. In some embodiments, the powertrain 100 further includes a second motor 8, connected to the transmission gear assembly 16 of the transmission. The output shaft of the second motor 8 can be connected to the transmission gear assembly 16 via a coupling, a reduction gear set, a third shaft 103, etc. In other embodiments, the output shaft of the second motor 8 can also be coaxially arranged with the transmission gear assembly 16, as long as design requirements are met; this application is not limited to this.

[0047] The following will illustrate the power output of the powertrain 100 in some embodiments by describing the different states of the shift mechanism 7 and the different positions of the synchronizer 14.

[0048] Please see Figure 1 When the shift mechanism 7 is in the first state, that is, the second part 72 is connected to the first mating structure A and the second mating structure B, and the synchronizer 14 is in the second synchronous position D, the synchronizer 14 is connected to the second transmission gear 10. The shift mechanism 7 connects the sun gear 41 to the locking disc 5, which is fixed on the transmission housing. At this time, the planetary mechanism 4 acts as a reduction mechanism. The power output by the engine 1 is transmitted to the wheels through the planet carrier 43, the ring gear 42, the second transmission gear 10, the synchronizer 14, the second speed regulating gear mechanism 11, the second drive gear 12, and the differential 13, with the first fixed speed ratio (transmission ratio).

[0049] When the shift mechanism 7 is in the first state and the synchronizer 14 is in the first synchronized position F, the synchronizer 14 is connected to the first transmission gear 15. The shift mechanism 7 connects the sun gear 41 to the locking disc 5, which is fixed on the transmission housing. At this time, the planetary mechanism 4 acts as a reduction mechanism. The power output by the engine 1 is transmitted to the wheels through the planet carrier 43, the ring gear 42, the first drive gear 3, the first transmission gear 15, the synchronizer 14, the second speed regulating gear mechanism 11, the second drive gear 12, and the differential 13, with the second fixed speed ratio (transmission ratio).

[0050] Please see Figure 2 When the shifting mechanism 7 is in the second state, that is, the second part 72 is connected to the second mating structure B and separated from the first mating structure A and the third mating structure C, and the synchronizer 14 is in the second synchronous position D, the synchronizer 14 is connected to the second transmission gear 10, the shifting mechanism 7 connects the sun gear 41 to the first motor 6, and the planetary mechanism 4 can realize the power splitting function, that is, the power of the engine 1 can be distributed to the sun gear 41 and the first motor 6 for power generation through the planet carrier 43. This electrical energy can drive the motor to drive the wheels, or supply power to other devices, or charge the battery; the other part of the power is distributed to the wheels through the gear ring 42, the second transmission gear 10, the synchronizer 14, the second speed regulating gear mechanism 11, the second drive gear 12, and the differential 13, with the third speed ratio (transmission ratio).

[0051] When the shift mechanism 7 is in the second state and the synchronizer 14 is in the first synchronized position F, the synchronizer 14 is connected to the first transmission gear 15. The shift mechanism 7 connects the sun gear 41 to the first motor 6. The planetary mechanism 4 can realize the power splitting function, that is, the power of the engine 1 can be distributed to the sun gear 41 and the first motor 6 through the planet carrier 43 for power generation. This electrical energy can drive the second motor 8 to drive the wheels, or supply power to other devices, or charge the battery. The other part of the power is distributed to the wheels through the gear ring 42, the first drive gear 3, the first transmission gear 15, the synchronizer 14, the second speed regulating gear mechanism 11, the second drive gear 12, and the differential 13, and output to the wheels at the fourth speed ratio (transmission ratio).

[0052] Please see Figure 3 When the shift mechanism 7 is in the third state, that is, the second part 72 is connected to the second mating structure B and the third mating structure C, and the synchronizer 14 is in the second synchronous position D, the synchronizer 14 is connected to the second transmission gear 10, and the shift mechanism 7 connects the sun gear 41 to the planet carrier 43. At this time, the planetary mechanism 4 acts as a fixed gear, and the power output by the engine 1 is output to the wheels through the planet carrier 43, the ring gear 42, the second transmission gear 10, the synchronizer 14, the second speed regulating gear mechanism 11, the second drive gear 12, and the differential 13, with the fifth fixed speed ratio (transmission ratio).

[0053] When the shift mechanism 7 is in the third state and the synchronizer 14 is in the first synchronized position F, the synchronizer 14 is connected to the first transmission gear 15, and the shift mechanism 7 connects the sun gear 41 to the planetary carrier 43. At this time, the planetary mechanism 4 acts as a fixed gear, and the power output by the engine 1 is output to the wheels through the planetary carrier 43, the ring gear 42, the first drive gear 3, the first transmission gear 15, the synchronizer 14, the second speed regulating gear mechanism 11, the second drive gear 12, and the differential 13, with the sixth fixed speed ratio (transmission ratio).

[0054] In pure electric mode, the first motor 6 rotates in reverse, at which point the one-way clutch 2 locks, and the first motor 6 can act as a drive motor, driving the wheels simultaneously with the second motor 8, significantly improving the overall power performance of the vehicle 200. Alternatively, the second motor 8 can also operate independently as a power source in pure electric mode to drive the wheels; the power transmission path is similar to the aforementioned embodiment and will not be repeated here.

[0055] When synchronizer 14 is in the third synchronization position E and shift mechanism 7 is in the third state, first motor 6 is directly connected to engine 1, and no torque impacts the wheel end when engine 1 is started.

[0056] The transmission and powertrain 100 of this application have a simple structure, low cost, and comprehensive functions, and can realize multiple working modes such as pure electric, power split, and multi-speed adjustment. In pure electric mode, it adopts dual motor drive, which has stronger power. The speed adjustment gears are diversified, which can better balance power and economy. When starting the engine 1, there will be no impact on the wheel end.

[0057] Please see Figure 5 The embodiments of this application also provide a vehicle 200, including a body 201 and a powertrain 100 as described in the above embodiments, the powertrain 100 being disposed on the body 201.

[0058] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A transmission, characterized in that, include: Planetary mechanism, including sun gear, planet carrier, and gear ring; A first shaft, one end of which is connected to the planetary carrier, and the other end of which is used to connect to the engine; A locking disc is disposed opposite to the sun gear and fixed in a preset position; The second axis is coaxial with the first axis and is located on the side of the planetary mechanism away from the first axis; A shifting mechanism is assembled on the second shaft. The shifting mechanism includes a first part and a second part connected to each other. The first part is used to connect to the first motor, and the second part is disposed in the planetary mechanism for switching the engagement relationship between the sun gear and the locking disc or the planet carrier. The third axis is spaced apart from the first axis; A gear assembly is mounted on the third shaft, and the gear assembly and the gear ring can be selectively engaged.

2. The transmission according to claim 1, characterized in that: The locking disc is provided with a first mating structure, the sun gear is provided with a second mating structure, and the planet carrier is provided with a third mating structure; When the shifting mechanism is in the first state, the second part is connected to the first mating structure and the second mating structure respectively, and the sun gear is fixed relative to the locking disc; When the shifting mechanism is in the second state, the second part is connected to the second mating structure for driving connection between the sun gear and the first motor; When the shifting mechanism is in the third state, the second part is connected to the second mating structure and the third mating structure respectively, and the sun gear is fixed relative to the planet carrier.

3. The transmission according to claim 1, characterized in that: The transmission also includes a first drive gear and a synchronizer. The first drive gear is mounted on the first shaft and is connected to the gear ring. The diameter of the first drive gear is different from the diameter of the gear ring. The gear assembly includes a first gear and a second gear with different diameters. The first gear is configured to correspond to the first drive gear, and the second gear is configured to correspond to the gear ring. The synchronizer is mounted between the first gear and the second gear and is used to switch the transmission engagement relationship between the first gear and the first drive gear, and to switch the transmission engagement relationship between the second gear and the gear ring.

4. The transmission according to claim 3, characterized in that: The gear assembly further includes a first synchronous position, a second synchronous position, and a third synchronous position; when the synchronizer is in the first synchronous position, the first gear meshes with the first drive gear, and the second gear disengages from the gear ring. When the synchronizer is in the second synchronized position, the second gear meshes with the gear ring, and the first gear disengages from the first drive gear. When the synchronizer is in the third synchronization position, the transmission gear assembly is disengaged from the gear ring and the first drive gear.

5. The transmission according to claim 1, characterized in that, The transmission also includes: A first speed regulating gear mechanism is assembled on the third shaft. The first speed regulating gear mechanism is spaced apart from the speed changing gear assembly. The first speed regulating gear mechanism is used to connect to the second motor.

6. The transmission according to claim 5, characterized in that, The transmission also includes: The fourth axis is spaced apart from the third axis on the side away from the first axis; The differential engages with the transmission gear assembly. The second drive gear is mounted on the fourth shaft and engages with the differential transmission. The second speed regulating gear mechanism is assembled on the fourth shaft and the third shaft, and the second speed regulating gear mechanism is located between the speed change gear assembly and the first speed regulating gear mechanism. The second speed regulating gear mechanism is in transmission cooperation with the differential.

7. The transmission according to claim 1, characterized in that: The transmission also includes: A one-way clutch is disposed on the first shaft, and the one-way clutch is spaced apart on the side of the planetary mechanism away from the shifting mechanism.

8. The transmission according to claim 1, characterized in that: The shifting mechanism includes a first clutch and a second clutch. A portion of the first clutch is used to connect the first motor, and the other portion is used to switch the transmission connection between the locking disc and the sun gear. A portion of the second clutch is used to connect the first motor, and another portion is used to switch the transmission connection between the sun gear and the planet carrier.

9. A powertrain, characterized in that, include: The transmission according to any one of claims 1-8; Engine, connected to the first shaft of the transmission; The first motor is connected to the shifting mechanism of the transmission; The second motor is connected to the transmission gear assembly.

10. A vehicle, characterized in that, include: Body; and, The powertrain of claim 9, wherein the powertrain is disposed on the vehicle body.

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