TRANSMISSION DEVICE FOR HYBRID VEHICLES

Abstract

A transmission device of a hybrid vehicle, the transmission device comprising an input shaft assembly, a power generation motor input shaft assembly, a drive motor input shaft assembly, an output shaft assembly, a clutch, a step-up planetary gear set, a step-down planetary gear set, and a parking mechanism, wherein the input shaft assembly is located at a front end of the transmission device; the power generation motor input shaft assembly is located between the step-up planetary gear set and the drive motor input shaft assembly; the drive motor input shaft assembly is located between the power generation motor input shaft assembly and the reduction planetary gear set; the output shaft assembly is located at a rear end of the transmission device; the clutch is located between the power generation motor (5) and a drive motor (8); the input shaft arrangement is constructed from an input shaft (2) and a transmission planetary gear set planetary carrier (3.2); the input shaft (2) is connected to a power source; the input shaft (2) is provided with the transmission planetary gear set planetary carrier (3.2); the power generation motor input shaft assembly is comprised of a power generation motor input shaft (4), a transmission planetary gear set sun gear (3.1), and a clutch hub (6.1); the power generation motor input shaft (4) is provided with the transmission planetary gear set sun gear (3.1) and the clutch hub (6.1); the drive motor input shaft assembly is constructed from a drive motor input shaft (7), a clutch holder (6.2), and a reduction planetary gear set sun gear (9.1); the drive motor input shaft (7) is provided with the clutch holder (6.2) and the reduction planetary gear set sun gear (9.1); the output shaft arrangement is constructed from an output shaft (11), a parking gear (10.1), and a reduction planetary gear set planetary carrier (9.2); the output shaft (11) is provided with the parking gear (10.1) and with the reduction planetary gear set planetary carrier (9.2); the clutch is constructed from the clutch hub (6.1) and the clutch holder (6.2); the clutch hub (6.1) is rigidly connected to the power generation motor input shaft (4); the clutch holder (6.2) is connected to the drive motor input shaft (7); the transmission planetary gear set is constructed from a transmission planetary gear set planetary gear, a transmission planetary gear set ring gear (3.3), the transmission planetary gear set planetary carrier (3.2), and the transmission planetary gear set sun gear (3.1); the transmission planetary gear set ring gear (3.3) is fastened to a housing (12); the transmission planetary gear set planetary gear is fastened to the transmission planetary gear set planetary carrier (3.2); the transmission planetary gear set planetary gear meshes internally with the transmission planetary gear set ring gear (3.3); the transmission planetary gear set planetary gear meshes externally with the transmission planetary gear set planetary carrier (3.2); the reduction planetary gear set is constructed from a reduction planetary gear set planetary gear, a reduction planetary gear set ring gear (9.3), the reduction planetary gear set planetary carrier (9.2), and the reduction planetary gear set sun gear (9.1); the reduction planetary gear set ring gear (9.3) is attached to the housing (12); the reduction planetary gear set planetary gear is attached to the reduction planetary gear set planetary carrier (9.2); the reduction planetary gear set planetary gear meshes internally with the reduction planetary gear set ring gear (9.3) and meshes externally with the reduction planetary gear set sun gear (9.1); the parking mechanism is constructed from the parking gear (10.1) and a parking pawl (10.2); the parking pawl (10.2) is fixed to the housing (12); and the parking gear (10.1) is integrated with the reduction planetary gear set holder.

Description

The present disclosure relates to a power transmission device, particularly a transmission device of a hybrid vehicle, including a transmission planetary gear set, a reduction planetary gear set, and a clutch capable of achieving connection and disconnection of two motors.While the global and Chinese Domestic Carbon Peak Targets (2030) and Carbon Neutrality Targets (2060) are presented and the pressure on energy saving and emissions reduction increases, it is expected that after the commercial implementation of the national VI light vehicle emissions regulations of 2020, the four-level fuel consumption regulations for light commercial vehicles are fully implemented in 2025. Up to 2035, in China, half of annual sales are all for the energy saving vehicles and new energy vehicles, while all passenger cars operated with conventional energy are switched to hybrid vehicles, thus achieving the comprehensive electrification transition of the automotive industry.In recent years, with the rapid development and technology innovation of the automotive industry, hybrid drive assemblies with new energies are increasingly widely applied to the field of transmissions, so that various power combination forms of an engine, a power generator and a motor can be satisfied and the respective advantages of the engine and the motor are fully made valid. The hybrid drive assemblies with new energies, like a vehicle with conventional fuel, can meet the requirement for continuous driving performance and have low requirements for infrastructures. The hybrid drive assemblies with new energies can meet the economic requirement like a pure electric vehicle. In the few next years, they are an important development direction for vehicles with new energies.Hybrid electric vehicles have the advantage of conserving fuel. Hybrid electric vehicles do not have the range concern of pure electric vehicles and battery loss in extreme climates, and may meet the needs of users in all scenarios. Hybrid electric vehicles are very promising.In recent years, in order to reduce fuel consumption and meet energy saving and environmental protection, a multi-speed automatic transmission driven by an internal combustion engine serving as a single power source has been gradually developed, and attempts to reduce fuel consumption by increasing the number of speeds. However, this method causes problems as follows. The first problem is that the structure of the transmission becomes more and more complex, and the transmission is difficult to develop and manufacture and has high maintenance costs. The second problem is that the cost of a power transmission unit is increased, and the complex structure also involves higher development cost. The third problem is that increasing the number of speeds does not usually obviously achieve a fuel consumption reducing effect. This causes the input and output to not achieve an ideal balance.Patent Literature citedCN 1 06 183 779 A discloses a dual clutch propulsion system configuration for a hybrid electric vehicle. The configuration consists of an engine, a front planetary gear set, a power generator, a brake, a first clutch, a rear planetary gear set, a drive axle assembly, an engine, a second clutch, and an energy storage device. According to the dual clutch drive system configuration for a hybrid electric vehicle, the engine is connected to a ring gear, planet carriers are connected to the engine to serve as an output, and the output torque is large; the two clutches are additionally arranged, whereby disconnection of the engine and the front planetary gear set and auxiliary drive of the electric generator to the engine can be achieved.JP 2019-034 608 A discloses a hybrid drive apparatus which increases the number of speed ratios of an engine used for running or power generation and a motor in a wide speed range. In a power transmission path, a first planetary gear mechanism in which a first rotating element, a second rotating element, and a third rotating element are aligned in this order in a speed diagram; a second planetary gear mechanism in which a fourth rotating element, a fifth rotating element, and a sixth rotating element are aligned in this order in the speed diagram; and a first connection and disconnection mechanism and a second connection and disconnection mechanism that connect and disconnect a first output path and a second output path that connect an engine and an output shaft are provided.US 2013 / 0 151 048 A discloses a control system and a method for controlling starting of an engine in a hybrid vehicle.CN 1 06 183 780 A discloses a coaxial clutch drive system comprising double planetary gearing and double motors. The coaxial clutch drive system includes the dual motors, the dual planetary gears, and the like. Each planetary gear includes a ring gear, a planet carrier and a sun gear. A rotor of the first motor is connected to the ring gear of the first planetary gear. A rotor of the second motor is connected via synchronizers to the sun gear of the first planetary gear and the sun gear of the second planetary gear, respectively.In order to overcome the disadvantages in the related art, the purpose of the present disclosure is to provide a compact-structured light transmission device of a hybrid vehicle that can achieve energy saving and emission reduction and also can achieve 8 types of power transmission modes.The object of the present disclosure is achieved by the following technical solutions:A transmission device of a hybrid vehicle includes an input shaft assembly, a power generation motor input shaft assembly, a drive motor input shaft assembly, an output shaft assembly, a clutch, a planetary gear set, a reduction planetary gear set, and a parking mechanism, the input shaft assembly located at a front end of the transmission device; the power generation motor input shaft assembly located between the planetary gear set and the drive motor input shaft assembly; the drive motor input shaft assembly located between the power generation motor input shaft assembly and the reduction planetary gear set; the output shaft assembly located at a rear end of the transmission device; the clutch located between the power generation motor and a drive motor;said input shaft assembly is constructed of an input shaft and a planetary gear set planet carrier; said input shaft is connected to a power source; said input shaft is provided with said planetary gear set planet carrier;the power generation motor input shaft assembly is constructed of an engine input shaft, a planetary gear set sun gear, and a clutch hub; the engine input shaft is provided with the planetary gear set sun gear and the clutch hub;said drive motor input shaft assembly is constructed of a drive motor input shaft, a clutch holder, and a reduction planetary gear set sun gear; said drive motor input shaft is provided with said clutch holder and said reduction planetary gear set sun gear;said output shaft assembly is constructed of an output shaft, a park gear and a reduction planetary gear set planet carrier; said output shaft is provided with said park gear and said reduction planetary gear set planet carrier;the clutch is constructed of the clutch hub and the clutch holder; the clutch hub is connected to the engine input shaft; the clutch holder is connected to the engine input shaft;the planetary gear set is constructed of a planetary gear set planet gear, a planetary gear set ring gear, a planetary gear set planet carrier, and a planetary gear set sun gear; the planetary gear set ring gear is fixed to a housing; the planetary gear set planet gear is fixed to the planetary gear set planet carrier; the planetary gear set planet gear internally meshes with the planetary gear set ring gear; the planetary gear set planet gear externally meshes with the planetary gear set planet carrier;the reduction planetary gear set is constructed of a reduction planetary gear set planet gear, a reduction planetary gear set ring gear, a reduction planetary gear set planet carrier, and a reduction planetary gear set sun gear; the reduction planetary gear set ring gear is fixed to a housing; the reduction planetary gear set planet gear is fixed to the reduction planetary gear set planet carrier; the reduction planetary gear set planet gear internally meshes with the reduction planetary gear set ring gear and externally meshes with the reduction planetary gear set sun gear;the parking mechanism is configured of a parking gear and a parking pawl; the parking pawl is fixed to the housing; and the parking gear is integrated with the reduction planetary gear set holder.Compared with the prior art, the present disclosure has the following advantages.1. The present disclosure provides the transmission device of the hybrid vehicle including the accelerating planetary gear train], the decelerating planetary gear train], and the clutch capable of achieving the connection and disconnection of two motors. The planetary gear set has a higher output speed than an input speed. In contrast, the reduction planetary gear set has a lower output speed than an input speed, thereby achieving a deceleration and torque-up function. The clutch may connect the drive motor to the power generation motor and disconnect the drive motor from the power generation motor according to control of a fuel pressure. An output device driving in combination with the motor and the engine can achieve hybrid fuel-electricity transmission performance.2. The transmission device of the hybrid vehicle of the present disclosure has a simple structure and a reasonable design, is convenient to repair, and has lower parts cost and machining difficulty. Based on the simple planetary gear set structure and the components of mature products on the market, an electric vehicle mode, two direct drive modes, and two parallel connection modes are achieved by two motors and one clutch. The parallel mode can effectively improve the operating state of the engine. Along with the direct drive mode of the engine, fuel economy and dynamic property of a vehicle can be effectively solved at a high speed. The engine may always be in an efficient zone. The fuel consumption of the entire vehicle is excellent. FIG. 1 is a schematic structural diagram of a transmission device of a hybrid vehicle.The technical solutions of the present invention will be further described below together with the accompanying drawings.The present disclosure provides a transmission device suitable for application to an engine rear drive vehicle. As shown in FIG. 1, the transmission device includes an input shaft assembly, a power generation motor input shaft assembly, a drive motor input shaft assembly, an output shaft assembly, a clutch, a planetary gear set, a planetary gear set, and a parking mechanism. The input shaft assembly is located at a front end of the transmission device. The power generation motor input shaft assembly is located between the planetary gear set and the drive motor input shaft assembly. The drive motor input shaft assembly is located between the power generation motor input shaft assembly and the reduction planetary gear set. The output shaft assembly is located at a rear end of the transmission device. The clutch is located between a power generation motor and a drive motor.In the present disclosure, the input shaft arrangement is constructed from an input shaft 2 and from an accelerating planetary gear set planetary carrier [Engl.: "accelerating planetary gear train planetary frame"] 3.2. The input shaft 2 is connected to a power source. The input shaft 2 is provided with the transmission planetary gear set planetary carrier 3.2. The input shaft assembly may input a transmission input to the planetary gear set.The power generation motor input shaft assembly in the present disclosure is constructed of a power generation motor input shaft 4, a planetary gear set sun gear 3.1, and a clutch hub 6.1. The power generation motor input shaft 4 is provided with the planetary gearset sun gear 3.1 and the clutch hub 6.1. The power generation motor input shaft assembly may input a planetary gear set input to the clutch or to the power generation motor 5.The drive motor input shaft assembly in the present invention is constructed from a drive motor input shaft 7, a clutch holder 6.2, and a reduction planetary gearset sun gear 9.1. The drive motor input shaft 7 is provided with the clutch holder 6.2 and with the reduction planetary gearset sun gear 9.1. The drive motor input shaft assembly may input a clutch input to the reduction planetary gear set or may input a drive motor input to the reduction planetary gear set.The output shaft assembly in the present disclosure is constructed of an output shaft 11, a park gear 10.1, and a reduction planetary gearset planet carrier 9.2. A center line of the output shaft 11 is consistent with an axial direction of the input shaft 2. The output shaft 11 is provided with the parking gear 10.1 and with the reduction planetary gear set planet carrier 9.2. The output shaft assembly can input a reduction planetary gear set input to the output shaft 11 and ultimately output it to the vehicle.The clutch is constructed of the clutch hub 6.1 and the clutch holder 6.2 in the present disclosure. The clutch hub 6.1 is connected to the power generation motor input shaft 4. The clutch holder 6.2 is connected to the drive motor input shaft. According to various operating state modes, the clutch achieves disconnection and connection according to a fuel pressure, and can disconnect the power generation motor input shaft 4 from the drive motor input shaft 7 and connect the power generation motor input shaft 4 to the drive motor input shaft 7. When power is transmitted from the input shaft 2 to the clutch hub 6.2, a power flow is divided according to an actual working state. One part may be input to the power generation motor 5 to cause the motor to generate power to charge a storage battery, and the other part. If the clutch is engaged at this time, the power flow from the input shaft 2 is transmitted through the clutch to the output shaft 11 at the rear end of the transmission device. If the clutch is disengaged at this time, the power flow from the input shaft is interrupted at the clutch.The planetary gear set in the present disclosure is composed of a planetary gear set planetary gear, an accelerating planetary gear set ring gear [3.3, a planetary gear set planetary carrier 3.2, and a planetary gear set sun gear 3.1, and can speed up the transmission input. The planetary gear set ring gear 3.3 is fixed to the housing 12 with its rotational speed fixed. The planetary gear set planetary gear is fixed to the planetary gear set planetary carrier 3.2. The planetary gearset planetary gear may be rotatably supported by the planetary gearset planetary carrier 3.2. The transmission planetary gear set planetary gear is internally engaged with the transmission planetary gear set ring gear 3.3 and is externally engaged with the transmission planetary gear set planetary carrier 3.2. The electrical phase of the hybrid phase is selected from the group consisting of:The planetary gear set planet carrier 3.2 has the same rotational speed as the input shaft 2. After being accelerated by the planetary gear set, the rotational speed is transmitted to the sun gear 3.1 of the planetary gear set. Since the planetary gear set is simultaneously constructed of a single planetary gear set, an efficient power output interval of the engine can be easily optimized as long as a proper speed increase ratio is determined. In particular, the engine may continuously output power according to a working state with the highest fuel economy.According to the present disclosure, the reduction planetary gear set is configured of a reduction planetary gear set planetary gear, a reduction planetary gear set ring gear 9.3, a reduction planetary gear set planetary carrier 9.2, and a reduction planetary gear set sun gear 9.1, and can speed up transmission input. The reduction planetary gear set ring gear 9.3 is fixed to the housing 12 with its rotation speed fixed. The transmission planetary gear set planetary gear is fixed to the transmission planetary gear set planetary carrier 9.2. The reduction planetary gear set planetary gear can be rotatably supported by the reduction planetary gear set planetary carrier 9.2. The planetary gear is internally engaged with the reduction planetary gear set ring gear 9.3 and externally engaged with the reduction planetary gear set sun gear 9.1. The reduction planetary gear set sun gear 9.1 has the same rotational speed as the drive motor input shaft 7. After being decelerated by the reduction planetary gear set, the rotational speed of the reduction planetary gear set sun gear 9.1 is transmitted to the reduction planetary gear set planet carrier 9.2. At the same time, the reduction planetary gear set is constructed of a single planetary gear set as well as the transmission planetary gear set, so that extremely high torque output can be obtained by deceleration and torque increase, which is very advantageous for the ascent and acceleration. The parking pawl 10.2 is fixed to the housing 12. The parking gear 10.1 is integrated with the reduction planetary gear set holder 9.2. When the parking gear 10.1 and the parking pawl 10.2 are combined, the hybrid device transmission component stops rotating and the vehicle is stopped at this time.The rotation of the input shaft assembly is supported by a bearing in the present disclosure; the input shaft 2 of the input shaft assembly is rigidly connected to the transmission planetary gearset planet carrier 3.2. At this time, when the power is transmitted from the power source to the input shaft 2, the input shaft assembly can input the transmission input to the planetary gear set.The joining methods include, but are not limited to, welding, riveting, spline connection, press fit, knuckle connection, integrated machining, and the like in the present disclosure.The rotation of the power generation motor input shaft assembly is supported by a bearing in the present disclosure. The power generation motor input shaft 4 of the power generation motor input shaft assembly is connected to the planetary gearset sun gear 3.1 and to the clutch hub 6.1. At the same time, the power generation motor input shaft assembly is detachably connected to the power generation motor 5. The power generation motor input shaft assembly is detachably connected to the power generation motor 5 in the present disclosure. At the same time, since the power generation motor input shaft 4 is detachably connected to the power generation motor 5, defective parts can be easily repaired when the power generation motor input and the power generation motor 5 fail, which lowers maintenance costs.The rotation of the drive motor input shaft assembly is supported by a bearing in the present disclosure. The drive motor input shaft 7 of the drive motor input shaft assembly is rigidly connected to the clutch holder 6.2 and to the reduction planetary gearset sun gear 9.1. At the same time, the drive motor input shaft arrangement is detachably connected to the drive motor 8. At the same time, as in the detachable connection between the power generation motor input shaft 4 and the power generation motor 5, only the defective part is easily repaired when the drive motor input shaft or the drive motor 8 fails, which lowers the maintenance cost.The rotation of the output shaft assembly is supported by a bearing in the present disclosure. The output shaft 11 of the output shaft arrangement is rigidly connected to the reduction planetary gear set planet carrier 9.2 and the parking gear 10.1 is integrated on the reduction planetary gear set planet carrier 9.2.Since the axial size is much larger than the radial size in the present disclosure, the hybrid transmission device can be well applicable to a vehicle whose output shaft 11 (crankshaft) of the engine is configured relative to a forward direction of the vehicle in the longitudinal direction.The clutch is located between the power generation motor 5 and the drive motor 8 in the present disclosure, so that the clutch can easily connect and disconnect the two motors. At the same time, the two motors are separately arranged, which can also reduce the thermal field disturbance between the motors and is more convenient for heat dissipation. The tooth shape of the parking gear 10.1 is simple and easy to machine, so that the parking gear 10.1 can be integrated to the reduction planetary gear set holder 9.2. Along the radial direction, the parking gear 10.1 and the reduction planetary gear set holder overlap in the axial direction. Thus, the parking gear 10.1 and the reduction planetary gear set holder can be compactly arranged without being stacked, and the entire structure of the transmission device is compact.In the present disclosure, there are three cases for the power input of the output shaft 11: A: The total power comes from the engine 1; B: The total power comes from the drive motor 8; C: The power comes from both the engine 1 and the drive motor 8; When the vehicle is in a moving, reversing, rising, and other state at this time, the needs of the driver can be easily satisfied by selecting different power sources.The transmission device of the present disclosure can achieve the following 8 transmission modes in various operating states of the clutch, the engine 1, the drive motor 8, and the power generation motor 5.Mode 1 - Electric vehicle (EV): As shown in Table 1, the engine 1 and the power generation motor 5 do not operate in this mode; the clutch is disengaged; and the drive motor 8 independently outputs power serving as a power source of the transmission device. A power transmission line: The drive motor 8 implements the running and implements the transmission with the drive motor input shaft assembly to transmit the power to the reduction planetary gear set sun gear 9.1. According to the reduction planetary gearset fixed ring gear 9.3, the rotational speed (relative to the reduction planetary gearset sun gear) transmitted from the reduction planetary gearset sun gear 9.1 to the reduction planetary gearset carrier 9.2 is decelerated and output, so that power is eventually transmitted to the output shaft 11.Mode 2 - Series connection: As shown in Table 1, in this mode, the engine 1 transmits the power to the power generation motor 5. the power generation motor 5 converts the power of the engine 1 into electric power, which is stored in a battery. The clutch is disengaged and the drive motor 8 generates power. A power transmission line: The power from the engine 1 is transmitted to the planetary gear set planet carrier 3.2 via the input shaft 2. According to the action of the fixed planetary gearset ring gear 3.3, rotation from the planetary gearset planet carrier 3.2 is accelerated by the planetary gearset sun gear 3.1 (relative to the speed input by the engine). Simultaneously, the power is output to the power generation motor input shaft assembly. The power generation motor input shaft 4 and the power generation motor 5 rotate together. At this time, the power generation motor 5 converts the power into electric energy that is stored in the battery. Since the clutch is disengaged in this mode, power from the engine 1 terminates at the clutch hub 6.1. At the same time, in this mode of operation, the drive motor 8 implements driving and implements transmission with the drive motor input shaft assembly to transmit power to the reduction planetary gearset sun gear 9.1. According to the reduction planetary gearset fixed ring gear 9.3, the rotational speed (relative to the reduction planetary gearset sun gear) transmitted from the reduction planetary gearset sun gear 9.1 to the reduction planetary gearset planet carrier 9.2 is decelerated and output, so that power is eventually transmitted to the output shaft 11.Mode 3 - Direct Drive 1: As shown in Table 1, in this mode, the engine 1 operates; the power generation motor 5 and the drive motor 8 do not operate; and the clutch is engaged. According to this operating state, the battery has enough electricity so that it is not necessary to charge the battery by the power generation motor 5. A power transmission line: The power from the engine 1 is transmitted to the planetary gear set planet carrier 3.2 via the input shaft 2. According to the action of the fixed planetary gearset ring gear 3.3, the rotational input of the planetary gearset planet carrier 3.2 is accelerated by the planetary gearset sun gear 3.1 (relative to the engine input speed). At the same time, the clutch is engaged. The clutch connects the power generation motor input shaft assembly to the drive motor input shaft assembly. Power from the power generation motor input shaft assembly is transmitted via the engaged clutch to the reduction planetary gearset sun gear 9.1 in the drive motor input shaft assembly. According to the action of the fixed reduction planetary gearset ring gear 9.3, the speed transmitted from the reduction planetary gearset sun gear 9.1 to the reduction planetary gearset planet carrier 9.2 is decelerated and output (relative to the deceleration sun planet carrier). Finally, the power is transmitted to the output shaft 11.Mode 4 - Direct Driving 2: As shown in Table 1, in this mode, the engine 1 operates; the power generation motor 5 generates power; the drive motor 8 does not operate; and the clutch is engaged. According to this operating state, the battery does not have enough electricity so that the power generation motor 5 needs to charge the battery. A power transmission line: The power from the engine 1 is transmitted to the planetary gear set planet carrier 3.2 via the input shaft 2. According to the action of the fixed planetary gearset ring gear 3.3, the rotational input of the planetary gearset planet carrier 3.2 is accelerated by the planetary gearset sun gear 3.1 (relative to the engine input speed). Simultaneously, the power is output to the power generation motor input shaft assembly. In addition, since the power generation motor 5 operates, the power on the power generation motor input shaft assembly is partially transmitted to the power generation motor 5. At the same time, the power generation motor 5 charges the battery. The other part of the power from the input shaft is transmitted via the engaged clutch to the reduction planetary gearset sun gear 9.1 in the drive motor input shaft assembly. According to the action of the fixed reduction planetary gearset ring gear 9.3, the speed transmitted from the reduction planetary gearset sun gear 9.1 to the reduction planetary gearset planet carrier 9.2 (relative to the reduction planetary gearset sun gear) is decelerated and output. Finally, the power is transmitted to the output shaft 11.Mode 5 - Parallel Connection 1: As shown in Table 1, in this mode, the engine 1 operates; the power generation motor 5 does not operate; the drive motor 8 operates; and the clutch is engaged. According to this operating state, the battery has enough electricity so that it is not necessary to charge the battery by the power generation motor 5. A power transmission line: The power from the engine 1 is transmitted to the planetary gear set planet carrier 3.2 via the input shaft 2. According to the action of the fixed planetary gearset ring gear 3.3, the rotational input of the planetary gearset planet carrier 3.2 is accelerated by the planetary gearset sun gear 3.1 (relative to the engine input speed). Simultaneously, the power is output to the power generation motor input shaft assembly. At this time, the clutch is engaged. The clutch connects the power generation motor input shaft assembly to the drive motor input shaft assembly. Power from the power generation motor input shaft assembly is transmitted via the engaged clutch to the reduction planetary gearset sun gear 9.1 in the drive motor input shaft assembly. At the same time, the drive motor 8 operates to transmit power also to the reduction planetary gearset sun gear 9.1 via the drive motor input shaft 7. After the two parts of the power are coupled by the reduction planetary gearset sun gear 9.1, according to the action of the reduction planetary gearset fixed ring gear 9.3, the speed transmitted from the reduction planetary gearset sun gear 9.1 to the reduction planetary gearset planet carrier 9.2 is decelerated and output (relative to the reduction planetary gearset sun gear). Finally, the power is transmitted to the output shaft 11.Mode 6 - Parallel Connection 2: As shown in Table 1, in this mode, the engine 1; the power generation motor 5 and the drive motor 8 operate; and the clutch is engaged. According to this operating state, the battery does not have enough electricity so that the power generation motor 5 needs to charge the battery. A power transmission line: The power from the engine 1 is transmitted to the planetary gear set planet carrier 3.2 via the input shaft 2. According to the action of the fixed planetary gearset ring gear 3.3, the rotational input of the planetary gearset planet carrier 3.2 is accelerated by the planetary gearset sun gear 3.1 (relative to the engine input speed). Simultaneously, the power is output to the power generation motor input shaft assembly. Also, since the power generation motor 5 operates, the power on the power generation motor input shaft assembly is partially transmitted to the power generation motor 5. At the same time, the power generation motor 5 charges the battery. The other part of the power from the input shaft is transmitted via the engaged clutch to the reduction planetary gear sun gear 9.1 in the drive motor input shaft assembly. Simultaneously, the drive motor 8 operates to also transmit power to the reduction planetary gearset sun gear 9.1 via the drive motor input shaft 7. After the two parts of the power are coupled by the reduction planetary gearset sun gear 9.1, the speed transmitted from the reduction planetary gearset sun gear 9.1 to the reduction planetary gearset planet carrier 9.2 is subject to deceleration and torque increase and output according to the action of the reduction planetary gearset fixed ring gear 9.3 (relative to the reduction planetary gearset sun gear). Finally, the power is transmitted to the output shaft 11.Mode 7 - Brake Recovery: As shown in Table 1, in this mode, the engine 1 and the power generation motor 5 do not operate. The drive motor 8 uses power generated by the acceleration braking of the vehicle to charge the battery, and the clutch is disengaged. A power transmission line: The output shaft 11 receives the power generated by the vehicle brake and transmits the power to the reduction planetary gear set planetary carrier 9.2. According to the action of the fixed reduction planetary gearset ring gear 9.3, the speed transmitted from the reduction planetary gearset planet carrier 9.2 to the reduction planetary gearset sun gear 9.1 (relative to the reduction planetary gearset planet carrier) is accelerated toward the drive motor input shaft assembly. During this time, the power is transmitted to the drive motor 8. The drive motor 8 converts this part of the power into electric energy which is stored in the battery.Mode 8 - Idle power generation: As shown in Table 1, in this mode, the engine 1 and the power generation motor 5 operate; the clutch is disengaged; and the drive motor 8 does not operate. A power transmission line: The power from the engine is transmitted to the planetary gear set planet carrier 3.2 via the input shaft 2. According to the action of the fixed planetary gearset ring gear 3.3, rotation from the planetary gearset planet carrier 3.2 is accelerated by the planetary gearset sun gear 3.1 (relative to the speed input by the engine). Simultaneously, the power is output to the power generation motor input shaft assembly. The power generation motor input shaft 4 and the power generation motor 5 rotate together. At this time, the power generation motor 5 operates to convert the power into electric energy stored in the battery. Since the clutch is disengaged in this mode, power from the engine terminates at the clutch hub 6.1. Table 1 Working mode table of transmission device Table 1 Working mode table of transmission deviceMode 1 - EVdoes not operatedoes not operateDisengaged disengaged disengaged disengaged disengaged disengagedDrive drivesMode 2 - Series connectionoperating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operatinggenerating powerDisengaged disengaged disengaged disengaged disengaged disengagedDrive drivesMode 3 - Direct Drive 1operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operatingdoes not operateEngaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engageddoes not operateMode 4 - Direct Drive 2operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operatinggenerating powerEngaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engageddoes not operateMode 5 - Parallel Circuit 1operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operatingdoes not operateEngaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged EngagedDrive drivesMode 6 - Series Circuit 2operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operatinggenerating powerEngaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged Engaged EngagedDrive drivesMode 7 - Brake Recoverydoes not operatedoes not operateDisengaged disengaged disengaged disengaged disengaged disengagedgenerating powerMode 8 - Idle Power Generationoperating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operating operatinggenerating powerDisengaged disengaged disengaged disengaged disengaged disengageddoes not operateReverse Gear Mode: The transmission device of the present disclosure is not provided with a reverse mechanical gear. The reverse gear function of the vehicle may be achieved by controlling the engine to rotate in a clockwise or counterclockwise direction according to operating characteristics of the engine according to the 1-EV mode.The kinematics and dynamics to be used in the hybrid transmission device of the present disclosure and the torque and speed relationships related to the energy efficiency that ignore the system transmission can be expressed as the following relationships: wherein Formulas (1), (2), (3), and (4) are applicable to the transmission planetary gear set and the reduction planetary gear set. Formula (1) is referred to as a planetary gear set rotational speed characteristic equation, and formula (4) is referred to as a planetary gear set characteristic parameter. In the formulae, Z refers to R or. Z S refers to the number of teeth of the ring gear and to the number of teeth of the sun gear; n S refers to the speed of the sun gear; n C refers to the speed of the planet carrier; n R refers to the speed of the ring gear; T S refers to the speed of the sun gear; T C refers to the torque of the planet carrier; and T R refers to the torque of the ring gear.

Claims

A transmission device of a hybrid vehicle, the transmission device comprising an input shaft assembly, a power generation motor input shaft assembly, a drive motor input shaft assembly, an output shaft assembly, a clutch, a transmission planetary gear set, a reduction planetary gear set, and a parking mechanism, wherein the input shaft assembly is located at a front end of the transmission device; the power generation motor input shaft assembly is located between the transmission planetary gear set and the drive motor input shaft assembly; the drive motor input shaft assembly is located between the power generation motor input shaft assembly and the reduction planetary gear set; the output shaft assembly is located at a rear end of the transmission device; the clutch is located between the power generation motor (5) and a drive motor (8); the input shaft assembly is constructed of an input shaft (2) and a transmission planetary gear set planetary carrier (3.2); the input shaft (2) is connected to a power source; the input shaft (2) is provided with the planetary gear set planet carrier (3.2); the power generation motor input shaft assembly is made up of a power generation motor input shaft (4), a planetary gear set sun gear (3.1) and a clutch hub (6.1); the power generation motor input shaft (4) is provided with the planetary gear set sun gear (3.1) and with the clutch hub (6.1); the drive motor input shaft assembly is made up of a drive motor input shaft (7), a clutch holder (6.2) and a planetary gear set sun gear (9.1); the drive motor input shaft (7) is provided with the clutch holder (6.2) and with the planetary gear set sun gear (9.1); the output shaft arrangement is made up of an output shaft (11), a park gear (10.1) and a reduction planetary gear set planet carrier (9.2); the output shaft (11) is provided with the park gear (10.1) and with the reduction planetary gear set planet carrier (9.2); the clutch is made up of the clutch hub (6.1) and the clutch holder (6.2); the clutch hub (6.1) is rigidly connected to the power generation motor input shaft (4); the clutch holder (6.2) is connected to the drive motor input shaft (7); the transmission planetary gear set is made up of a transmission planetary gear set planet gear, a transmission planetary gear set ring gear (3.3), the transmission planetary gear set planet carrier (3.2) and the transmission planetary gear set sun gear (3.1); the transmission planetary gearset ring gear (3.3) is fixed to a housing (12); the transmission planetary gearset planet gear is fixed to the transmission planetary gearset planet carrier (3.2); the transmission planetary gearset planet gear internally meshes with the transmission planetary gearset ring gear (3.3); the transmission planetary gearset planet gear externally meshes with the transmission planetary gearset planet carrier (3.2); the reduction planetary gearset is made up of a reduction planetary gearset planet gear, a reduction planetary gearset ring gear (9.3), the reduction planetary gearset planet carrier (9.2), and the reduction planetary gearset sun gear (9.1); the reduction planetary gearset ring gear (9.3) is fixed to the housing (12); the reduction planetary gearset planetary gear is fixed to the reduction planetary gearset planetary carrier (9.2); the reduction planetary gearset planetary gear meshes internally with the reduction planetary gearset ring gear (9.3) and meshes externally with the reduction planetary gearset sun gear (9.1); the park mechanism is made up of the park gear (10.1) and a park pawl (10.2); the park pawl (10.2) is fixed to the housing (12); and the park gear (10.1) is integrated with the reduction planetary gearset holder.Transmission device of a hybrid vehicle according to claim 1, wherein the input shaft (2) is connected to the planetary gear set planet carrier (3.2).The transmission device of a hybrid vehicle according to claim 1, wherein the power generation motor input shaft (4) is connected to the transmission planetary gear set sun gear (3.1) and to the clutch hub (6.1).The transmission device of a hybrid vehicle according to claim 1, wherein the power generation motor input shaft assembly is detachably connected to the power generation motor (5).The transmission device of a hybrid vehicle according to claim 1, wherein the drive motor input shaft (7) is connected to the clutch holder (6.2) and to the reduction planetary gear set sun gear (9.1).A transmission device of a hybrid vehicle according to claim 1, wherein the drive motor input shaft assembly is detachably connected to the drive motor (8).A transmission device of a hybrid vehicle according to claim 1, wherein the output shaft (11) is connected to the reduction planetary gear set planetary carrier (9.2).The hybrid vehicle transmission device according to any one of claims 1, 2, 3, 5 or 7, wherein the joining methods include, but are not limited to, welding, riveting, spline connection, press fitting, knuckle connection, and integrated machining.The transmission device of a hybrid vehicle according to claim 1, wherein a center line of the output shaft (11) is consistent with an axial direction of the input shaft (2).

Images