Six-speed hybrid gearbox and speed shifting method

Abstract

The present invention discloses a six-speed hybrid gearbox and a speed shifting method. The six-speed hybrid gearbox comprises a housing, a main shaft, a first planetary mechanism, a second planetary mechanism, a third planetary mechanism, a motor, a third clutch, a first brake and a second brake. The main shaft is rotatably connected in the housing. The main shaft is transmission-connected with a first clutch and a second clutch. The first clutch and the second clutch are used to transmit the power of the main shaft. The motor is arranged in the housing. The motor stator is connected to the shell. The rotor is used as a rotating component in the housing. The rotor shaft is connected to the first planet carrier. The size limitation of the series distribution of two devices is reduced, and the space utilization rate of the reduction box and the output power of the motor are increased. The second planetary mechanism is used as an intermediate component. The first planetary mechanism and the third planetary mechanism are arranged on both sides of the second planetary mechanism to reduce the support length. The three planetary mechanisms are linked to each other. The mechanism is simple and convenient for processing and installation.

Description

Technical Field

[0001] The present invention relates to the technical field of gearboxes, and in particular to a six-speed hybrid gearbox and a speed shifting method. Background Art

[0002] The gearbox is a common automotive accessory, which is usually installed in the car for power transmission.

[0003] Traditional gearboxes mainly use a nine-speed transmission route, which uses at least four planetary mechanisms, and the transmission route and installation structure are complex. Traditional gearboxes are not easy to produce, assemble, install and use. In addition, the transmission relationship of each planetary mechanism in the previous gearbox is connected in series, and the final output power gear is easily affected by axial force. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a six-speed hybrid transmission that can reduce the impact of the transmission axial size on the motor size and simplify the transmission structure.

[0005] The present invention also provides a speed changing method.

[0006] According to a first aspect of an embodiment of the present invention, a six-speed hybrid transmission comprises a housing, a main shaft, a first planetary mechanism, a second planetary mechanism, a third planetary mechanism, a motor, a third clutch, a first brake, and a second brake, the main shaft being rotatably connected in the housing, the main shaft being transmission-connected with a first clutch and a second clutch, the first clutch and the second clutch being used to transmit power of the main shaft, the main shaft being used to transmission-connect an output shaft of an engine; the first planetary mechanism comprising a first sun gear, a first planetary row, a first planetary carrier, and a first ring gear, the first sun gear being connected to the first clutch, the first planetary row being meshed and connected between the first ring gear and the first sun gear, and the first planetary carrier being connected to the first planetary row; the second planetary mechanism comprising a second sun gear, a second planetary row, a second planetary carrier, and a second ring gear, the second sun gear being connected to the first ring gear, the second planetary row being meshed and connected between the second ring gear and the second sun gear, the second planetary carrier being connected to the second planetary row, and the second planetary carrier being used to transmission-connect The third planetary mechanism includes a third sun gear, a third planetary row, a third planetary carrier and a third ring gear, the third sun gear is fixedly connected to the housing, the third planetary row is meshed and connected between the third ring gear and the third sun gear, the third planetary carrier is connected to the third planetary row, the third planetary carrier is connected to the first planetary carrier, and the second clutch is connected to the third ring gear; the motor is arranged in the housing, the output end of the motor is connected to the first planetary carrier; the third clutch is arranged between the first planetary carrier and the first ring gear, one end of the third clutch is connected to the first planetary carrier, and the other end of the third clutch is connected to the first ring gear; one end of the first brake is connected to the housing, the other end of the first brake is connected to the first sun gear, and the first brake is used to brake or release the first sun gear; one end of the second brake is connected to the housing, the other end of the second brake is connected to the second sun gear, and the second brake is used to brake or release the second sun gear.

[0007] According to an embodiment of the present invention, a six-speed hybrid transmission has at least the following beneficial effects: the motor is arranged inside the box, the motor stator is connected to the shell, and the rotor serves as a rotating component in the box, so that the motor and the transmission body are combined into one, reducing the size limitation of the two motors distributed in series, increasing the space utilization rate of the reduction box and the output power of the motor, the present invention adopts a simple planetary mechanism, with the second planetary mechanism as the middle component, the first planetary mechanism and the third planetary mechanism are arranged on both sides of the second planetary mechanism, reducing the influence of the axial force when outputting power, thereby reducing the influence on the output gear bearing, the three planetary mechanisms The mechanisms are interconnected, with the third planetary carrier, the first planetary carrier and the second ring gear connected as a whole, to realize four driving modes: pure electric, hybrid, continuously variable transmission and direct drive, so as to achieve continuous switching of different modes under different road conditions, greatly improving fuel economy and comfort. The mechanism is simple and easy to manufacture and install. In addition, the structure of the six-speed hybrid transmission is simpler in layout because it only uses three simple planetary gear structures, which is also conducive to the production of parts and components. It is also simpler in implementation. It adopts a three-degree-of-freedom system, and only two clutches or one brake and one clutch are involved in the engagement each time it works. The operation is simple, thus achieving higher efficiency.

[0008] According to some embodiments of the present invention, the motor and the second ring gear are both connected to an end of the first planetary carrier away from the second planetary mechanism, and an end of the first planetary carrier close to the second planetary mechanism is connected to the third planetary carrier. The two ends of the first planetary carrier are respectively used to connect corresponding components, so that the force on the first planetary carrier is stable and the mechanical structure strength is stable.

[0009] According to some embodiments of the present invention, the first planetary carrier is connected to the motor via a fourth clutch, and the fourth clutch is used to close or separate the first planetary carrier and the motor. The provision of the fourth clutch enables the motor to perform power intervention as needed, thereby reducing losses caused by the first planetary carrier driving the motor to rotate.

[0010] According to some embodiments of the present invention, the second planetary mechanism is arranged between the first planetary mechanism and the third planetary mechanism.

[0011] According to some embodiments of the present invention, the first planet carrier and the third planet carrier are integrally formed.

[0012] A speed shifting method according to a second aspect of an embodiment of the present invention includes a six-speed hybrid transmission according to the first aspect of the present invention, comprising the following steps:

[0013] S1, engaging the first clutch with the main shaft, braking the second sun gear with the second brake, disengaging the other clutches, and deactivating the first brake to achieve first gear transmission;

[0014] S2, engaging the second clutch with the main shaft, braking the second sun gear with the second brake, disengaging the other clutches, and deactivating the first brake to achieve transmission of the second gear ratio;

[0015] S3, engaging the first clutch and the second clutch with the main shaft, disengaging the other clutches, and disabling the first brake and the second brake, so as to achieve transmission of the third gear ratio;

[0016] S4, engaging the second clutch and the third clutch with the main shaft, disengaging the other clutches, and deactivating all brakes to achieve transmission of the fourth gear ratio;

[0017] S5, engaging the first clutch with the main shaft, engaging the first planetary carrier with the first ring gear with the third clutch, all brakes are in an inoperative state, and other clutches are in a disengaged state, so as to achieve transmission of the fifth gear ratio;

[0018] S6, engaging the second clutch with the main shaft, the first brake is in a working state, the other clutches are in a disengaged state, and the second brake is in a non-working state, so as to realize the transmission of the sixth gear.

[0019] A shifting method according to a third aspect of an embodiment of the present invention includes a six-speed hybrid transmission according to the first aspect of the present invention, comprising the following steps:

[0020] S1, applying the second brake to the second sun gear, disengaging all clutches, and deactivating the first brake to achieve electric drive first gear power transmission;

[0021] S2, engaging the third clutch with the main shaft, disengaging the other clutches, and deactivating the second brake to achieve second-gear power transmission of the electric drive;

[0022] S3, the first brake is engaged, all clutches are in a disengaged state, and the second brake is not working, so as to realize the transmission of the third gear of the electric drive.

[0023] A shifting method according to a fourth aspect of an embodiment of the present invention includes a six-speed hybrid transmission according to the first aspect of the present invention, comprising the following steps:

[0024] The first clutch is engaged with the main shaft, the other clutches are in a disengaged state, the first brake and the second brake are not in operation, and the transmission of continuously variable power is achieved.

[0025] A speed shifting method according to an embodiment of the present invention has at least the following beneficial effects: the present invention adopts a simple planetary mechanism, with the second planetary mechanism as the middle component, and the first planetary mechanism and the third planetary mechanism are arranged on both sides of the second planetary mechanism, so as to reduce the influence of axial force when outputting power, thereby reducing the influence on the output gear bearing, and the three planetary mechanisms are linked to each other, with the third planetary carrier, the first planetary carrier and the second ring gear connected as a whole, so as to realize four driving modes of pure electric, hybrid, continuously variable transmission and direct drive, so as to realize continuous switching of different modes for different road conditions, greatly improving fuel economy and comfort; in addition, the structure of the six-speed hybrid transmission is simpler in layout because it only adopts three simple planetary gear structures, and is also conducive to the production of parts and components, and is also simpler in implementation. It adopts a three-degree-of-freedom system, and only two clutches or one brake and one clutch are involved in the engagement each time it works, which is simple to operate and thus has higher efficiency.

[0026] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0028] Figure 1 Schematic diagram of the structure of a six-speed hybrid transmission according to an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A schematic diagram showing the connection of the planetary mechanisms of a six-speed hybrid transmission;

[0030] Figure 3 for Figure 1 A schematic structural diagram of the six-speed hybrid transmission case is shown.

[0031] Box body 100, coolant interlayer 110, inlet 120, outlet 130, heat absorbing sheet 140, copper plate 150, groove 151;

[0032] Main shaft 200, first clutch 210, second clutch 220;

[0033] A first sun gear 310 , a first planetary row 320 , a first planetary carrier 330 , a fourth clutch 331 , and a first ring gear 340 ;

[0034] The second sun gear 410, the second planetary gear row 420, the second planetary carrier 430, the second ring gear 440, and the output gear 450;

[0035] A third sun gear 510 , a third planetary gear row 520 , a third planetary carrier 530 , and a third ring gear 540 ;

[0036] Motor 600 , third clutch 700 , first brake 800 , second brake 900 . DETAILED DESCRIPTION

[0037] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0038] In the description of the present invention, "several" means one or more, "more" means two or more, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] Reference Figures 1 to 3 A six-speed hybrid transmission according to an embodiment of the first aspect of the present invention includes a case 100, a main shaft 200, a first planetary mechanism, a second planetary mechanism, a third planetary mechanism, a motor 600, a third clutch 700, a first brake 800 and a second brake 900.

[0041] The main shaft 200 is rotatably connected to the housing 100. The main shaft 200 is connected to a first clutch 210 and a second clutch 220. The first clutch 210 and the second clutch 220 are used to transmit power to the main shaft 200. The main shaft 200 is used to be connected to the output shaft of the engine.

[0042] The first planetary mechanism includes a first sun gear 310, a first planet row 320, a first planet carrier 330, and a first ring gear 340. The first sun gear 310 is connected to the first clutch 210. The first planet row 320 is meshed and connected between the first ring gear 340 and the first sun gear 310. The first planet carrier 330 is connected to the first planet row 320.

[0043] The second planetary mechanism includes a second sun gear 410, a second planet row 420, a second planet carrier 430, and a second ring gear 440. The second sun gear 410 is connected to the first ring gear 340. The second planet row 420 is meshedly connected between the second ring gear 440 and the second sun gear 410. The second planet carrier 430 is connected to the second planet row 420 and is used for transmission connection to the output gear 450. The second ring gear 440 is connected to the first planet carrier 330.

[0044] The third planetary mechanism includes a third sun gear 510, a third planet row 520, a third planet carrier 530, and a third ring gear 540. The third sun gear 510 is fixedly connected to the housing 100. The third planet row 520 is meshedly connected between the third ring gear 540 and the third sun gear 510. The third planet carrier 530 is connected to the third planet row 520. The third planet carrier 530 is connected to the first planet carrier 330. The second clutch 220 is connected to the third ring gear 540.

[0045] The motor 600 is disposed in the housing 100 , and the output end of the motor 600 is connected to the first planetary carrier 330 . It can be understood that the housing 100 serves as the mounting location for the stator, and the motor rotor is disposed in the housing 100 . The motor rotor is cylindrically shaped to avoid other mechanisms and components.

[0046] The third clutch 700 is disposed between the first planet carrier 330 and the first ring gear 340 . One end of the third clutch 700 is connected to the first planet carrier 330 , and the other end of the third clutch 700 is connected to the first ring gear 340 .

[0047] One end of the first brake 800 is connected to the housing 100 , and the other end of the first brake 800 is connected to the first sun gear 310 . The first brake 800 is used to brake or release the first sun gear 310 .

[0048] One end of the second brake 900 is connected to the housing 100 , and the other end of the second brake 900 is connected to the second sun gear 410 . The second brake 900 is used to brake or release the second sun gear 410 .

[0049] It should be understood that the motor is set inside the box, the box is used as the stator of the motor 600, and the rotor is used as the rotating component inside the box, so that the motor 600 and the gearbox are integrated into one, reducing the size limitation of the two devices in series distribution, increasing the space utilization rate of the reduction box and the output power of the motor, the present invention adopts a simple planetary mechanism, with the second planetary mechanism as the middle component, the first planetary mechanism and the third planetary mechanism are arranged on both sides of the second planetary mechanism, reducing the influence of the axial force when outputting power, thereby reducing the influence on the bearing of the output gear 450, the three planetary mechanisms are linked to each other, with the third planetary carrier 5 30. The first planetary carrier 330 and the second ring gear 440 are connected as one, realizing four driving modes: pure electric, hybrid, continuously variable transmission and direct drive, so as to achieve continuous switching of different modes for different road conditions, greatly improving fuel economy and comfort. The structure is simple and easy to manufacture and install. In addition, the structure of the six-speed hybrid transmission is simpler in layout because it only uses three simple planetary gear structures, which is also conducive to the production of parts and components. It is also simpler in implementation. It adopts a three-degree-of-freedom system, and only two clutches or one brake and one clutch are involved in the engagement each time. The operation is simple, thus achieving higher efficiency.

[0050] As can be understood, this transmission offers six engine direct drive gears, three pure electric drive gears, and one continuously variable transmission gear. This primarily addresses the complex transmission layout and structure of a nine-speed system. This transmission utilizes a shorter drive chain, resulting in a simpler structural layout, making it easier to implement in a vehicle. This shorter drive chain also results in higher efficiency. This transmission utilizes fewer components and is less expensive than conventional transmissions, making it suitable for vehicles with lower quality or stricter overall cost controls. Compared to other single-motor hybrid transmissions, this transmission utilizes three simple planetary mechanisms. The first and third planetary mechanisms supply the planetary carrier, forming an integral unit that can also be connected to the motor and integrated with the second ring gear. This significantly reduces the axial dimension of the entire transmission. The first ring gear 340 is connected to the second sun gear for compact output. The second planetary carrier 430 is connected to the output gear 450, preventing axial forces and minimizing their impact on the bearings of the output gear 450.

[0051] It should be noted that the current mainstream hybrid single-motor transmission usually adds a motor between the transmission and the engine, forming a series structure of engine-motor-transmission. The size of the motor is limited by the axial size of the transmission, and the motor cannot be too large, that is, the motor power will also be smaller. This results in a low pure electric operating frequency when the vehicle is driving on a crowded road. Therefore, the motor is set inside the box, and the box is used as the stator connecting the motor 600, and the rotor is used as the rotating component inside the box, so that the motor 600 and the transmission body are combined into one, reducing the size limitation of the series distribution of the two devices and increasing the space utilization of the reduction gearbox and the output power of the motor.

[0052] It should be understood that a 5-speed gearbox on a hybrid gearbox is realized by using 5 shifting elements, namely 3 clutches and 2 brakes. The first clutch 210 and the second clutch 220 can be connected to the engine, the first brake 800 and the second brake 900 brake the first sun gear 310 and the second sun gear 410 respectively, and the third clutch 700 connects the first ring gear 340 with the first planetary carrier 330.

[0053] Reference Figure 3 The inner wall of the box body 100 is provided with a coolant interlayer 110, an inlet 120 and an outlet 130. The coolant interlayer 110 is used to accommodate coolant. The inlet 120 and the outlet 130 are both connected to the coolant interlayer 110. The inlet 120 and the outlet 130 are respectively used to introduce coolant and discharge coolant. The coolant interlayer 110 is provided to facilitate the filling of coolant, so that the coolant flows on the box body 100 to absorb the heat generated in the box body 100, thereby ensuring the stable operation of the gearbox. It can be understood that the wall thickness of the box body 100 and the thickness of the coolant interlayer 110 can be made as needed.

[0054] In some embodiments, a heat absorbing sheet 140 is provided in the box body 100, and the heat absorbing sheets 140 are distributed on the inner wall of the box body 100. There are several heat absorbing sheets 140, and the heat absorbing sheets 140 are arranged at intervals. The arranged heat absorbing sheets 140 can increase the inner surface area of ​​the box body 100 and improve the heat absorption efficiency.

[0055] In some embodiments, a copper plate 150 is embedded on one side of the cooling liquid interlayer 110 close to the inner cavity of the box body 100, and the heat absorbing plate 140 and the copper plate 150 are integrally formed. The copper plate 150 is provided with a plurality of semicircular grooves 151 distributed in a matrix, and the grooves 151 are used to accommodate the cooling liquid. The copper plate 150 is provided to facilitate heat conduction, and the heat absorbing plate 140 can better absorb heat. The semicircular grooves 151 allow the cooling liquid to enter, forming a plurality of lattice-shaped liquid bumps, thereby increasing the heat absorption efficiency and the heat dissipation efficiency. It should be noted that the copper plate 150 and the heat absorbing plate 140 are first installed in the inner layer of the box body 100 by embedding, and the gap is sealed by argon arc welding, and then the outer shell of the box body 100 is packaged by welding to form the cooling liquid interlayer 110.

[0056] It can be understood that in a planetary mechanism, the so-called planetary gear refers to a group of parts composed of multiple planetary gears. This group of parts is called a planetary gear, but in fact, in a planetary mechanism, the sun gear, planetary carrier and ring gear are the main input or output components. One of the three is fixed, and the other two, one is used as input and the other is output. Generally speaking, the planetary carrier is used as output, but this is not entirely true. Even if the planetary carrier is used as input, power transmission can be generated. In addition, two of the three are used as input and the other is used as output. At this time, the output power can be adjusted by adjusting the power ratio of the two inputs, so that stepless speed change can be achieved.

[0057] Reference Figure 1 and Figure 2 The motor 600 and the second ring gear 440 are both connected to the end of the first planetary carrier 330 away from the second planetary mechanism, and the end of the first planetary carrier 330 close to the second planetary mechanism is connected to the third planetary carrier 530. The two ends of the first planetary carrier 330 are respectively used to connect corresponding components, so that the force on the first planetary carrier 330 is stable and the mechanical structure strength is stable.

[0058] It can be understood that the planetary mechanism mainly includes the sun gear, planetary gears, planetary carrier and outer ring gear. When the outer ring gear is fixed, the sun gear is driven and the planetary carrier will rotate; when the sun gear is fixed, the outer ring gear is driven and the planetary carrier will rotate. The planetary carrier generally serves as power output, while the sun gear and outer ring gear generally serve as power input.

[0059] In some embodiments, the first planetary carrier 330 is connected to the motor 600 through the fourth clutch 331. The fourth clutch 331 is used to close or separate the first planetary carrier 330 and the motor 600. The setting of the fourth clutch 331 enables the motor to intervene in power as needed, reducing the loss caused by the first planetary carrier 330 driving the motor to rotate. The second planetary mechanism is arranged between the first planetary mechanism and the third planetary mechanism.

[0060] In some embodiments, a reinforcement block is provided at the connection between the first planetary carrier 330 and the second ring gear 440. The reinforcement block is made of rubber and is used to enhance the strength of the first planetary carrier 330. The reinforcement block is used to enhance the strength of the first planetary carrier 330 to avoid deformation and damage to the first planetary carrier 330. The first planetary carrier 330 and the third planetary carrier 530 are integrally formed.

[0061] A speed shifting method according to a second aspect of an embodiment of the present invention includes a six-speed hybrid transmission according to the first aspect of the present invention, comprising the following steps:

[0062] S1, engage the first clutch 210 with the main shaft 200, the second brake 900 brakes the second sun gear 410, the other clutches are in the disengaged state, and the first brake 800 is in the non-operating state, so that the power of the engine is transmitted from the main shaft 200 to the output gear 450 through the first clutch 210. The external power is transmitted to the main shaft 200, and the main shaft 200 transmits the power to the first sun gear 310 through the first clutch 210. The first sun gear 310 transmits the power to the first planetary carrier 330 connected to the second ring gear 440. The second ring gear 440 and the first planetary carrier 330 rotate synchronously. Since the second sun gear 410 is fixed, the power is transmitted from the second ring gear 440 directly to the output gear 450 through the second planetary carrier 430, and then transmitted to the power output mechanism through the output gear 450 to realize the transmission of the first gear;

[0063] S2, the second clutch 220 is engaged with the main shaft 200, the second brake 900 brakes the second sun gear 410, the other clutches are in the disengaged state, and the first brake 800 is in the non-operating state, so that the engine power is transmitted to the output gear 450 through the second clutch 220, and the external power is transmitted to the main shaft 200. The main shaft 200 transmits the power to the third ring gear 540 through the second clutch 220. Since the third sun gear 510 is fixed, the power passes through the third planetary carrier 530 and the first planetary carrier 330 to the second ring gear 440. Since the second sun gear 410 is fixed by the second brake 900, the power is transmitted from the second ring gear 440 to the output gear 450 directly through the second planetary carrier 430. Finally, the output gear 450 transmits the power to the output mechanism to achieve the second gear ratio.

[0064] S3, the first clutch 210 and the second clutch 220 are engaged with the main shaft 200, the other clutches are in the disengaged state, and the first brake 800 and the second brake 900 are in the non-operating state, so that the engine power is simultaneously transmitted to the output gear 450 through the first clutch 210 and the second clutch 220. The external power is transmitted to the main shaft 200, and the main shaft 200 transmits part of the power to the first sun gear 310 through the first clutch 210, and the other part of the power is transmitted to the third ring gear 540 through the second clutch 220. The first sun gear transmits the power to the first planetary gear 320, and the power of the third ring gear 540 is transmitted to the first planetary gear 330 through the third planetary carrier 530. The two powers are mixed in the first planetary gear and then transmitted to the second planetary gear 420 through the first ring gear 340 and the second ring gear 440. The two powers are mixed and merged in the second planetary gear 420, and then transmitted to the output gear 450 by the second planetary carrier 430, and finally transmitted to the power output mechanism to achieve the third gear ratio.

[0065] S4, engage the second clutch 220 and the third clutch 700 with the main shaft 200, and keep the other clutches in the disengaged state and all brakes in the non-operating state, so that the engine power is transmitted to the output gear 450 through the second clutch 220. The engine transmits the power to the third ring gear 540 through the main shaft 200 via the second clutch 220. Since the third clutch 700 is engaged, the first planetary carrier 330 and the first ring gear 340 are connected as a whole. Since the first planetary carrier 330 and the third planetary carrier 530 are also integrated, the power is transmitted from the third planetary carrier 530 to the first ring gear 340 and the second ring gear 440. Since the first ring gear 340 and the second sun gear 410 are connected as a whole, the power is finally transmitted to the second planetary carrier 430 at the same speed by the second sun gear 410 and the second ring gear 440, and finally transmitted to the power output mechanism through the output gear 450, so as to realize the transmission of the fourth speed ratio;

[0066] S5, the first clutch 210 is engaged with the main shaft 200, the third clutch 700 is engaged with the first planetary carrier 330 and the first ring gear 340, all brakes are in the non-operating state, and other clutches are in the disengaged state. This allows the engine power to pass through the first clutch 210 and then be transmitted to the output gear 450. The external power is transmitted to the main shaft 200, and the main shaft 200 transmits the power to the first sun gear 310 through the first clutch 210. At this time, the third clutch 700 is engaged, and all parts of the first and second planetary mechanisms are fixed together. The power is directly transmitted to the output gear 450 after passing through the first sun gear 310, and finally transmitted to the power output device by the output gear 450, thereby achieving the transmission of the fifth speed ratio.

[0067] S6, the second clutch 220 is engaged with the main shaft 200, the first brake 800 is in the operating state, the other clutches are in the disengaged state, and the second brake 900 is in the non-operating state, so that the engine power is transmitted to the output gear 450 after passing through the second clutch 220. Since the second clutch 220 is in operation, the power is transmitted to the third ring gear 540 through the second clutch 220. Since the first sun gear 310 is fixed, the power is transmitted to the second ring gear 440 by the third planetary gear. Since the first sun gear 310 is braked, the power is directly transmitted to the output gear 450, and finally transmitted to the output mechanism by the output gear 450, thereby achieving the sixth gear transmission.

[0068] S1, the second brake 900 brakes the second sun gear 410, all clutches are in the disengaged state, and the first brake 800 is not operated, so that the power of the motor 600 is transmitted to the output gear 450 through the second ring gear 440. When the second brake 900 is closed, the second sun gear 410 is braked. Since the motor 600 is directly connected to the second ring gear 440, the power is directly transmitted to the output gear 450 through the second planetary carrier 430. Finally, the output gear 450 transmits the power to the power output mechanism, thereby realizing the transmission of the electric drive first gear power.

[0069] S2, engage the third clutch 700 with the main shaft 200, disengage the other clutches, and deactivate the second brake 900, so that the power of the motor 600 is directly transmitted to the output gear 450. The third clutch 700 is engaged, fixing the first planetary mechanism and the second planetary mechanism together. The power of the motor 600 can be directly transmitted to the output gear 450 via the second ring gear 440, and finally transmitted to the power output mechanism via the output gear 450, thereby realizing the transmission of the electric drive second gear power.

[0070] S3, engage the first brake 800, disengage all clutches, and deactivate the second brake 900, so that the power of the motor 600 is transmitted to the output gear 450 via the second ring gear 440. The motor 600 is connected to the second ring gear 440 and the first planetary carrier 330. Since the first sun gear 310 is fixed, part of the power is transmitted to the second sun gear 410 via the first ring gear 340, and then merges with the power of the second ring gear 440 at the second planetary row 420. Finally, the power is transmitted to the output gear 450 by the second planetary carrier 430, and then transmitted to the power output mechanism by the output gear 450, thereby realizing the transmission of the third gear of the electric drive.

[0071] The first clutch 210 is engaged with the main shaft 200, and the other clutches are in the disengaged state. The first brake 800 and the second brake 900 are not working, so that the power of the motor 600 and the engine power are transmitted to the second ring gear 440 through the first ring gear 340 and the main shaft 200 respectively. The external power is transmitted to the main shaft 200, and the main shaft 200 is transmitted to the first sun gear 310 through the first clutch 210. The power of the motor 600 is transmitted to the second ring gear 440 and the first planetary carrier 330. The engine power is mixed with a part of the motor 600 in the first planetary mechanism and transmitted to the second sun gear 410 through the first ring gear 340. The power of the second ring gear 440 and the second sun gear 410 is mixed to the second planetary carrier 430 and transmitted to the output gear 450 through the second planetary carrier 430. Finally, it is transmitted to the power output mechanism by the output gear 450, realizing the transmission of continuously variable power.

[0072] It should be understood that the present invention adopts a simple planetary mechanism, with the second planetary mechanism as the middle component, and the first planetary mechanism and the third planetary mechanism are arranged on both sides of the second planetary mechanism to reduce the influence of axial force when outputting power, thereby reducing the influence on the bearing of the output gear 450. The three planetary mechanisms are linked to each other, with the third planetary carrier 530, the first planetary carrier 330 and the second ring gear 440 connected as a whole, to realize four driving modes of pure electric, hybrid, continuously variable transmission and direct drive, so as to realize continuous switching of different modes for different road conditions, greatly improving fuel economy and comfort; in addition, the structure of the six-speed hybrid transmission is simpler in layout because it only uses three simple planetary gear structures, and it is also conducive to the production of parts and components. It is also simpler in implementation. It adopts a three-degree-of-freedom system, and only two clutches or one brake and one clutch are involved in the engagement each time it works. The operation is simple, thereby achieving higher efficiency.

[0073] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. A six-speed hybrid gearbox, characterized in that: include: box(100); A main shaft (200) is rotatably connected in the housing (100), and a first clutch (210) and a second clutch (220) are transmission-connected to the main shaft (200); A first planetary mechanism, comprising a first sun gear (310), a first planet row (320), a first planet carrier (330) and a first ring gear (340), wherein the first sun gear (310) is connected to the first clutch (210), the first planet row (320) is meshedly connected between the first ring gear (340) and the first sun gear (310), and the first planet carrier (330) is connected to the first planet row (320); A second planetary mechanism, comprising a second sun gear (410), a second planet row (420), a second planet carrier (430) and a second ring gear (440), wherein the second sun gear (410) is connected to the first ring gear (340), the second planet row (420) is meshedly connected between the second ring gear (440) and the second sun gear (410), the second planet carrier (430) is connected to the second planet row (420), the second planet carrier (430) is used for transmission connection to an output gear (450), and the second ring gear (440) is connected to the first planet carrier (330); A third planetary mechanism, comprising a third sun gear (510), a third planet row (520), a third planet carrier (530) and a third ring gear (540), wherein the third sun gear (510) is fixedly connected to the housing (100), the third planet row (520) is meshedly connected between the third ring gear (540) and the third sun gear (510), the third planet carrier (530) is connected to the third planet row (520), the third planet carrier (530) is connected to the first planet carrier (330), and the second clutch (220) is connected to the third ring gear (540); A motor (600) is arranged in the housing (100), and an output end of the motor (600) is connected to the first planet carrier (330); A third clutch (700) is arranged between the first planet carrier (330) and the first ring gear (340), one end of the third clutch (700) is connected to the first planet carrier (330), and the other end of the third clutch (700) is connected to the first ring gear (340); A first brake (800), one end of which is connected to the housing (100), and the other end of which is connected to the first sun gear (310), and the first brake (800) is used to brake or release the first sun gear (310); A second brake (900) has one end connected to the housing (100), and the other end of the second brake (900) is connected to the second sun gear (410). The second brake (900) is used to brake or release the second sun gear (410).

2. A six-speed hybrid gearbox according to claim 1, characterized in that: The motor (600) and the second ring gear (440) are both connected to an end of the first planet carrier (330) away from the second planetary mechanism, and an end of the first planet carrier (330) close to the second planetary mechanism is connected to the third planet carrier (530).

3. A six-speed hybrid transmission according to claim 1, characterized in that: The first planet carrier (330) is connected to the motor (600) via a fourth clutch (331), and the fourth clutch (331) is used to close or separate the first planet carrier (330) and the motor (600).

4. A six-speed hybrid transmission according to claim 1, characterized in that: The second planetary mechanism is disposed between the first planetary mechanism and the third planetary mechanism.

5. The six-speed hybrid transmission according to claim 1, characterized in that: The first planet carrier (330) and the third planet carrier (530) are integrally formed.

6. A speed changing method, characterized in that: The six-speed hybrid transmission according to any one of claims 1 to 5 is used, comprising the following steps: S1, the first clutch (210) is engaged with the main shaft (200), the second brake (900) brakes the second sun gear (410), the other clutches are in a disengaged state, and the first brake (800) is in a non-operating state, so as to achieve transmission of a first gear ratio; S2, the second clutch (220) is engaged with the main shaft (200), the second brake (900) brakes the second sun gear (410), the other clutches are in a disengaged state, and the first brake (800) is in a non-operating state, so as to achieve transmission of a second gear ratio; S3, engaging the first clutch (210) and the second clutch (220) with the main shaft (200), while the other clutches are in a disengaged state, and the first brake (800) and the second brake (900) are in a non-operating state, so as to achieve transmission of a third gear ratio; S4, engaging the second clutch (220) and the third clutch (700) with the main shaft (200), disengaging the other clutches, and disengaging all brakes, so as to achieve transmission of a four-speed ratio; S5, the first clutch (210) is engaged with the main shaft (200), the third clutch (700) is engaged with the first planetary carrier (330) and the first ring gear (340), all brakes are in a non-operating state, and other clutches are in a disengaged state, so as to achieve transmission of a five-speed ratio; S6, the second clutch (220) is engaged with the main shaft (200), the first brake (800) is in a working state, the other clutches are in a disengaged state, and the second brake (900) is in a non-working state, so as to achieve transmission of the sixth gear.

7. A speed changing method, characterized in that: The six-speed hybrid transmission according to any one of claims 1 to 5 is used, comprising the following steps: S1, braking the second sun gear (410) with the second brake (900), with all clutches in a disengaged state and the first brake (800) not operating, so as to achieve transmission of electric drive first gear power; S2, the third clutch (700) is engaged with the main shaft (200), the other clutches are in a disengaged state, and the second brake (900) is not operated, so as to achieve transmission of electric drive second gear power; S3, the first brake (800) is engaged, all clutches are in a disengaged state, and the second brake (900) is not operated, so as to achieve the transmission of the third gear of the electric drive.

8. A speed changing method, characterized in that: The six-speed hybrid transmission according to any one of claims 1 to 5 is used, comprising the following steps: the first clutch (210) is engaged with the main shaft (200), the other clutches are in a disengaged state, the first brake (800) and the second brake (900) are not in operation, so as to realize the transmission of continuously variable power.

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