EMU hybrid box and hybrid power transmission system

Abstract

The present invention discloses a hybrid transmission system for an electric multiple unit (EMU). The hybrid transmission system comprises a hybrid transmission housing, a diesel engine clutch dry chamber, a hybrid transmission wet chamber, and a planetary gear clutch dry chamber. The diesel engine clutch dry chamber houses a diesel engine clutch for connecting to the diesel engine. The planetary gear clutch dry chamber houses a planetary gear clutch for controlling planetary gear differentials and connecting to a transmission. The hybrid transmission wet chamber houses a planetary gear set comprising a sun gear train component, a planetary gear train component, and an outer ring gear train component. The diesel engine clutch and the planetary gear clutch are both connected to the planetary gear train component, and the outer ring gear train component is connected to the planetary gear clutch. The hybrid transmission wet chamber also houses a speed control motor gear shaft and a torque-increasing motor gear shaft. The outer ring gear train component is in transmission connection with the torque-increasing motor gear shaft, and the sun gear train component is in transmission connection with the speed control motor gear shaft. The present invention reduces the size and weight of the hybrid transmission system, making it suitable for installation under the EMU vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission for electric multiple units (EMUs), and in particular to a hybrid box and a hybrid power transmission system for an EMU. Background Art

[0002] With the promotion and implementation of energy conservation, environmental protection and dual carbon concepts, diesel EMUs are gradually developing towards hybrid EMUs, with power batteries and traditional diesel engines serving as the power sources of the EMUs at the same time. The diesel engine charges the power battery while driving the vehicle, enabling functions such as pure electric starting, hybrid acceleration, coasting and brake charging.

[0003] While parallel-parallel hybrid systems are widely used in passenger cars (such as the Toyota Prius), railway EMUs are significantly heavier, have greater traction power, and greater torque than passenger cars. Therefore, the power transmission methods used in passenger cars, such as multi-planetary gearbox combinations, multiple wet clutch and brake combinations, and integrated hybrid transmissions with transmissions and motors, are unable to meet the requirements of EMUs. Existing hybrid systems for EMUs utilize a separate hybrid transmission with a matching transmission and motor. However, due to the limited space under the EMU, the hybrid transmission's size and weight are extremely demanding. Therefore, a hybrid transmission that can fit under the EMU's installation space is needed. Summary of the Invention

[0004] The present invention provides a hybrid box and a hybrid power transmission system for an EMU to solve the above technical problems.

[0005] In order to achieve the above object, the technical solution of the present invention is:

[0006] A hybrid box for an electric train comprises a hybrid box body, wherein the hybrid box body comprises a diesel engine clutch dry chamber, a hybrid box wet chamber, and a planetary gear clutch dry chamber arranged in sequence;

[0007] The diesel engine clutch dry chamber is the input end, in which the diesel engine clutch for connecting to the diesel engine is arranged;

[0008] The planetary gear clutch dry chamber is the output end, in which the planetary gear clutch for controlling the planetary gear differential and connecting the gearbox is set;

[0009] A planetary gear set is provided in the wet chamber of the hybrid box. The planetary gear set includes: a sun gear train component, a planetary gear train component, and an outer ring gear system component; the diesel engine clutch and the planetary gear clutch are both connected to the planetary gear train component, and the outer ring gear system component is connected to the planetary gear clutch;

[0010] The hybrid box wet chamber is also provided with a speed regulating motor gear shaft for connecting to the speed regulating motor and a torque increasing motor gear shaft for connecting to the torque increasing motor; the outer ring gear system components are also transmission connected to the torque increasing motor gear shaft, and the sun gear system components are transmission connected to the speed regulating motor gear shaft.

[0011] Preferably, the sun gear train components include a sun gear and a sun gear; the inner teeth of the sun gear mesh with the drum teeth of the sun gear, and the sun gear is in driving connection with the gear shaft of the speed regulating motor;

[0012] The planetary gear train components include: a planetary carrier shaft, a planetary carrier, a planetary shaft, and a planetary gear; the planetary carrier is fixedly sleeved on the planetary carrier shaft, the planetary shaft is fixedly mounted on the side of the planetary carrier away from the planetary gear clutch dry chamber, and the planetary gear is rotatably mounted on the planetary shaft and meshes with the sun gear;

[0013] The outer gear ring system includes an outer gear ring and an outer gear ring support assembly for supporting the outer gear ring. The inner teeth of the outer gear ring are engaged with the planetary gear, and the outer teeth are connected to the gear shaft of the torque-increasing motor.

[0014] Preferably, the diesel engine clutch comprises: a diesel engine connection side fixedly connected to the diesel engine flywheel, a first planetary carrier connection side transmission-connected to the planetary carrier shaft, and a first electromagnetic coil controlling the engagement and separation of the diesel engine connection side and the first planetary carrier connection side.

[0015] Preferably, a hybrid box input end support and seal are provided between the hybrid box wet chamber and the diesel engine clutch dry chamber; the hybrid box input end support and seal include: an input end large end cover, an input end small end cover, an input end oil seal, an input end oil baffle plate and a planetary carrier support bearing; the input end large end cover is fixedly arranged in the hybrid box body, and the input end large end cover supports the sun gear; the planetary carrier support bearing is arranged between the input end large end cover and the planetary carrier shaft; the input end small end cover is fixedly arranged on the input end large end cover, the input end oil seal is fixedly sleeved on the planetary carrier shaft, and the input end oil baffle plate and the input end oil seal form a dynamic seal.

[0016] Preferably, the planetary gear clutch includes: a second planetary carrier connection side fixedly connected to the planetary carrier shaft, an outer ring gear connection side fixedly connected to the outer ring gear support assembly, and a second electromagnetic coil that controls the engagement and separation of the second planetary carrier connection side and the outer ring gear connection side, and the side of the outer ring gear connection side away from the planetary gear set is fixedly connected to the input end of the gearbox.

[0017] Preferably, the planetary gear train component further comprises a planet carrier flange, which is fixedly sleeved on the planet carrier shaft and located on a side of the planet carrier facing the planetary gear clutch, and is fixedly connected to the second planet carrier connection side.

[0018] Preferably, the outer ring gear support assembly includes: an outer ring gear end cover, an outer ring gear oil seal, an outer ring gear output small flange and an outer ring gear output large flange; the outer ring gear is fixedly connected to the outer ring gear connection side through the outer ring gear end cover, the outer ring gear output small flange and the outer ring gear output large flange; the outer ring gear oil seal is arranged between the outer ring gear end cover and the planetary carrier flange, and a labyrinth sealing structure is formed between the outer ring gear end cover and the planetary carrier.

[0019] Preferably, a hybrid case output end support and seal is provided between the hybrid case wet chamber and the planetary gear clutch dry chamber; the hybrid case output end support and seal include: an output end large end cover, an output end small end cover, an output end oil seal and an output end oil baffle plate; the output end large end cover is fixedly arranged in the hybrid case body, and the output end large end cover supports the outer gear ring output small flange; the output end small end cover is fixedly arranged on the output end large end cover, and the output end oil seal is fixedly sleeved on the outer gear ring output small flange, and the output end oil baffle plate and the output end oil seal form a dynamic seal.

[0020] Preferably, an intermediate support is also provided in the wet chamber of the hybrid box, and the intermediate support is located between the sun gear and the planetary carrier; the side of the planetary carrier away from the dry chamber of the planetary gear clutch is connected to the intermediate support through a copper oil seal; an intermediate lubricating oil circuit is opened among the intermediate support, the copper oil seal, the planetary carrier and the planetary shaft.

[0021] A hybrid power transmission system includes the aforementioned EMU hybrid box, and also includes a diesel engine, a power battery, a speed regulating motor, a torque increasing motor, a gearbox and an electronic control system; the diesel engine, speed regulating motor, torque increasing motor, gearbox and electronic control system are integrated into a hybrid power pack through a mounting frame and a suspension system and suspended under the EMU, and directly drive the EMU through the axle gearbox; the power battery integrated battery pack is installed on the roof of the EMU, the power battery stores energy and drives the EMU purely electrically or hybrid-driven through the hybrid power pack.

[0022] Beneficial effects:

[0023] First, the hybrid box of the EMU disclosed in the present application is configured as a diesel engine clutch dry chamber, a hybrid box wet chamber, and a planetary gear clutch dry chamber. A diesel engine clutch is disposed in the diesel engine clutch dry chamber, a planetary gear clutch is disposed in the planetary gear clutch dry chamber, and a planetary gear set is disposed in the hybrid box wet chamber to connect the diesel engine clutch, the planetary gear clutch, the speed regulating motor gear shaft, and the torque increasing motor gear shaft, thereby achieving hybrid power output. This reduces the size and weight of the hybrid box and can fit into the installation space under the EMU vehicle.

[0024] Second, the hybrid power transmission system disclosed in this application can realize pure diesel engine drive, pure electric drive or hybrid drive EMU. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0026] Figure 1 This is a schematic structural diagram of the hybrid box of an EMU disclosed in Example 1 of the present invention;

[0027] Figure 2 This is a cross-sectional diagram of the hybrid box of the EMU disclosed in Example 1 of the present invention. Figure 1 ;

[0028] Figure 3 for Figure 2 A partial enlarged view of middle A;

[0029] Figure 4 This is a cross-sectional diagram of the hybrid box of the EMU disclosed in Example 1 of the present invention. Figure 2 ;

[0030] Figure 5 for Figure 4 A partial enlarged view of middle B;

[0031] Figure 6 This is a cross-sectional diagram of the hybrid box of the EMU disclosed in Example 1 of the present invention. Figure 3 ;

[0032] Figure 7 for Figure 6 A partial enlarged view of center C;

[0033] Figure 8 This is a cross-sectional diagram of the hybrid box of the EMU disclosed in Example 1 of the present invention. Figure 4 ;

[0034] Figure 9 for Figure 8 A partial enlarged view of middle D;

[0035] Figure 10 Schematic diagram of the structure of the planetary carrier of the hybrid box of the EMU disclosed in Example 1 of the present invention Figure 1 ;

[0036] Figure 11 Schematic diagram of the structure of the planetary carrier of the hybrid box of the EMU disclosed in Example 1 of the present invention Figure 2 ;

[0037] Figure 12 This is a schematic cross-sectional view of the planetary carrier of the hybrid gearbox of an EMU disclosed in Example 1 of the present invention;

[0038] Figure 13This is a schematic structural diagram of a hybrid power transmission system disclosed in Example 2 of the present invention;

[0039] Figure 14 This is a schematic structural diagram of a hybrid power pack of a hybrid power transmission system disclosed in embodiment 2 of the present invention.

[0040] 1. Hybrid case body; 11. Diesel engine clutch dry chamber; 12. Hybrid case wet chamber; 121. Input end fixing flange; 122. Output end fixing flange; 13. Planetary gear clutch dry chamber;

[0041] 2. Diesel engine clutch; 21. Diesel engine connection side; 22. First planetary carrier connection side; 221. First planetary carrier connection portion; 222. First planetary carrier joint portion; 23. First electromagnetic coil; 24. Diesel engine flywheel connection; 25. Diesel engine connection side support bearing;

[0042] 3. Planetary gear clutch; 31. Second planet carrier connection side; 32. Outer ring gear connection side; 321. Outer ring gear connection portion; 322. Outer ring gear joint portion; 33. Second electromagnetic coil; 34. Gearbox connection portion; 35. Electromagnetic coil support bearing; 36. Second planet carrier support bearing;

[0043] 4. Hybrid case input end support and seal; 41. Input end large end cover; 411. Input end large end cover connection; 412. Input end large end cover seal mounting portion; 413. Large gear support bearing mounting portion; 414. Input end large end cover shielding portion; 42. Input end small end cover; 43. Input end oil seal; 44. Input end oil baffle; 45. First planet carrier support bearing; 46. Input end seal ring;

[0044] 5. Sun gear system components; 501. Sun gear; 502. Gear support bearing; 503. Sun gear; 5031. Sun gear gear portion; 5032. Sun gear connection portion; 5033. Sun gear drum gear portion; 504. Semicircular retaining ring; 505. Speed ​​regulating motor transition gear; 506. Transition shaft bearing; 507. Transition shaft sleeve; 508. Transition shaft; 509. Transition shaft spacer sleeve 1; 510. Transition shaft end cap; 511. Speed ​​regulating motor gear shaft; 512. Speed ​​regulating motor gear shaft bearing; 513. Set screw;

[0045] 61. Intermediate support; 611. Intermediate support fixing portion; 612. Intermediate support mounting portion; 613. Intermediate support connecting portion; 62. Copper oil seal;

[0046] 7. Planetary gear train components; 71. Planet carrier shaft; 72. Planet carrier; 721. Planet carrier fixing sleeve; 722. First support plate; 723. Second support plate; 7231. Oil groove; 724. Side support; 7241. Planet gear clearance opening; 73. Planet carrier flange; 731. Planet carrier flange fixing portion; 732. Planet carrier flange connection portion; 74. Planet shaft; 75. Planet gear; 76. Planet gear support bearing; 78. Clearance installation space;

[0047] 8. Outer gear ring system components; 801. Outer gear ring support bearing seat; 802. Outer gear ring support bearing; 803. Outer gear ring; 804. Outer gear ring end cover; 8041. Outer gear ring end cover fixing portion; 8042. Outer gear ring end cover connecting portion; 8043. Outer gear ring end cover sealing portion; 805. Outer gear ring oil seal; 806. Outer gear ring output small flange; 8061. Small flange first connecting portion; 8062. Small flange second connecting portion; 807. Outer gear ring output large flange; 8071. Large flange first connecting portion; 8072. Large flange second connecting portion; 808. Torque-increasing motor transition gear; 809. Transition shaft spacer sleeve (II); 810. Lubrication pump driving gear; 811. Torque-increasing motor gear shaft; 812. Torque-increasing motor gear shaft bearing;

[0048] 9. Hybrid box output end support and seal; 91. Output end large end cover; 911. Output end large end cover connection; 912. Output end large end cover seal mounting portion; 913. Output end large end cover shielding portion; 92. Output end small end cover; 93. Output end oil seal; 94. Output end oil baffle;

[0049] 10. Hybrid transmission lubrication system; 1001. Lubrication pump; 1002. Oil suction line; 1003. Output lubrication oil line; 1004. Input lubrication oil line; 1005. Intermediate planetary gear train lubrication line; 1006. Transmission oil line; 1007. Intermediate lubrication oil line;

[0050] 20. Diesel engine; 30. Gearbox; 40. Speed ​​regulating motor; 60. Power battery; 70. Electronic control system. DETAILED DESCRIPTION

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0052] Example 1:

[0053] A hybrid box for EMU, combined with Figures 1-14 As shown, it includes a hybrid case body 1, which includes a diesel engine clutch dry chamber 11, a hybrid case wet chamber 12 and a planetary gear clutch dry chamber 13 arranged in sequence; the diesel engine clutch dry chamber 11 is an input end, in which a diesel engine clutch 2 for connecting to the diesel engine 20 is arranged; the planetary gear clutch dry chamber 13 is an output end, in which a planetary gear clutch 3 for connecting to the transmission 30 is arranged; a planetary gear set is arranged in the hybrid case wet chamber 12, and the planetary gear set includes: a sun gear train component 5, a planetary gear train component 7 and an outer ring gear system component 8; the diesel engine clutch 2 and the planetary gear clutch 3 are both connected to the planetary gear train component 7, and the outer ring gear system component 8 is connected to the planetary gear clutch 3; the hybrid case wet chamber 12 is also provided with a speed regulating motor gear shaft 511 for connecting to the speed regulating motor 40 and a torque increasing motor gear shaft 811 for connecting to the torque increasing motor; the outer ring gear system component 8 is also transmission-connected to the torque increasing motor gear shaft 811, and the sun gear system component 5 is transmission-connected to the speed regulating motor gear shaft 511.

[0054] The present application realizes a dry and wet chamber structure by configuring the hybrid case body 1 as a diesel engine clutch dry chamber 11, a hybrid case wet chamber 12 and a planetary gear clutch dry chamber 13; a diesel engine clutch 2 is arranged in the diesel engine clutch dry chamber 11, a planetary gear clutch 3 is arranged in the planetary gear clutch dry chamber 13, and a planetary gear set is provided in the hybrid case wet chamber 12 to realize the connection between the diesel engine clutch 2, the planetary gear clutch 3, the speed regulating motor gear shaft 511 and the torque increasing motor gear shaft 811, thereby realizing a mixed power output; the volume and weight of the hybrid case are reduced, and it can match the installation space under the EMU vehicle.

[0055] Specifically, because the traction power and torque of an EMU far exceed those of a typical passenger car and are limited by the space under the EMU, dry electromagnetic clutches are used for the diesel engine clutch 2 and planetary gear clutch 3. This achieves both traction power and torque while meeting the volume and weight requirements of the EMU's undercarriage installation space. Due to the dimensional limitations of the dry electromagnetic clutch, this application configures the hybrid transmission housing 1 as a three-part system: a diesel engine clutch dry chamber 11, a hybrid engine wet chamber 12, and a planetary gear clutch dry chamber 13. The hybrid engine wet chamber 12 houses a planetary gear set, which is connected to the speed control motor gear shaft 511 and the torque multiplier motor gear shaft 811 via two parallel shaft gear sets. The diesel engine clutch dry chamber 11 houses the diesel engine clutch 2 to connect the power of the diesel engine 20, while the planetary gear clutch dry chamber 13 houses the planetary gear clutch 3 to achieve differential control of the planetary gears.

[0056] Specifically, the hybrid box wet chamber 12 includes a cylindrical section and a square section, which are interconnected. The cylindrical section, the diesel engine clutch dry chamber 11 and the planetary gear clutch dry chamber 13 form a cylindrical structure with equal outer diameters, and its outer diameter is consistent with the size of the connecting flange of the flywheel housing of the diesel engine 20 and the gearbox 30.

[0057] Preferably, the sun gear train component 5 includes a sun gear 503 and a sun gear 501; the internal teeth of the sun gear 501 are meshed with the drum-shaped teeth of the sun gear 503, and the sun gear 501 is in transmission connection with the speed regulating motor gear shaft 511;

[0058] The planetary gear train component 7 includes a planetary carrier shaft 71, a planetary carrier 72, a planetary shaft 74, and a planetary gear 75. The planetary carrier 72 is fixedly mounted on the planetary carrier shaft 71, the planetary shaft 74 is fixedly mounted on the planetary carrier 72, and the planetary gear 75 is rotatably mounted on the planetary shaft 74 via a planetary gear support bearing 76 and meshes with the sun gear 503.

[0059] The outer gear ring system component 8 includes an outer gear ring 803 and an outer gear ring support assembly for supporting the outer gear ring 803 . The inner teeth of the outer gear ring 803 are engaged with the planetary gear 75 , and the outer teeth are transmission-connected to the torque-increasing motor gear shaft 811 .

[0060] Preferably, the diesel engine clutch 2 includes: a diesel engine connection side 21 fixedly connected to the flywheel of the diesel engine 20, a first planetary carrier connection side 22 drivingly connected to the planetary carrier shaft 71, and a first electromagnetic coil 23 that controls the engagement and disengagement of the diesel engine connection side 21 and the first planetary carrier connection side 22. When the first electromagnetic coil 23 is energized, the diesel engine connection side 21 and the first planetary carrier connection side 22 engage, connecting the diesel engine 20 to the system; when the first electromagnetic coil 23 is de-energized, the diesel engine connection side 21 and the first planetary carrier connection side 22 disengage, disconnecting the diesel engine 20 from the system.

[0061] Specifically, the diesel engine clutch 2 also includes a diesel engine flywheel connection 24 and a diesel engine connection-side support bearing 25. The first planet carrier connection side 22 includes a first planet carrier connection portion 221 and a first planet carrier joint portion 222. The first planet carrier connection portion 221 is mounted to the input end of the planet carrier shaft 71 (i.e., the end located within the diesel engine clutch dry chamber 11) via a form fit or key connection. In this embodiment, the first planet carrier connection portion 221 is connected to the input end of the planet carrier shaft 71 via a spline structure. The diesel engine connection side 21 and the first electromagnetic coil 23 are located on either side of the first planet carrier joint portion 222, with the first electromagnetic coil 23 located on the side of the first planet carrier joint portion 222 facing the planetary gear set. A diesel engine connection-side support bearing 25 is provided between the diesel engine connection side 21 and the first planet carrier connection portion 221 for rotational connection. A diesel engine connection-side support bearing 25 is provided between the first electromagnetic coil 23 and the first planet carrier connection portion 221 for rotational connection. A diesel engine flywheel connection portion 24 is provided on the diesel engine connection side 21 so that the diesel engine connection side 21 is connected to the flywheel of the diesel engine 20 via bolts.

[0062] Preferably, a hybrid box input end support and seal 4 is provided between the hybrid box wet chamber 12 and the diesel engine clutch dry chamber 11; the hybrid box input end support and seal 4 includes: an input end large end cover 41, an input end small end cover 42, an input end oil seal 43, an input end oil baffle plate 44 and a first planetary carrier support bearing 45; the input end large end cover 41 is fixedly arranged in the hybrid box body 1, and the input end large end cover 41 supports the sun gear 501; the first planetary carrier support bearing 45 is arranged between the input end large end cover 41 and the planetary carrier shaft 71; the input end small end cover 42 is fixedly arranged on the input end large end cover 41, the input end oil seal 43 is fixedly sleeved on the planetary carrier shaft 71, and the input end oil baffle plate 44 and the input end oil seal 43 form a dynamic seal.

[0063] Specifically, the input end cover 41 includes a large input end cover connection portion 411, a large input end cover sealing mounting portion 412, and a large gear support bearing mounting portion 413. The large input end cover connection portion 411 is fixedly connected to the input end fixed flange 121 of the hybrid case wet chamber 12 via screws. A first planetary carrier support bearing 45 is installed between the large input end cover sealing mounting portion 412 and the planetary carrier shaft 71 to support the rotation of the planetary carrier shaft 71. A large gear support bearing 502 is provided between the large gear support bearing mounting portion 413 and the sun gear 501 for rotational connection. The small input end cover 42 is fixedly connected to the large input end cover connection portion 411 via screws. An input end sealing ring 46 is provided between the small input end cover 42 and the large input end cover sealing mounting portion 412 to form a static seal. The input end oil seal 43 and the input end oil baffle plate 44 are both located on the side of the first planetary carrier support bearing 45 facing the input end small end cover 42. The input end small end cover 42 presses the input end oil baffle plate 44 against the outer ring of the first planetary carrier support bearing 45. The input end oil baffle plate 44 and the input end oil seal 43 form a dynamic seal; and a labyrinth sealing structure is formed between the input end oil seal 43 and the input end small end cover 42.

[0064] Specifically, the input end large end cover 41 also includes an input end large end cover shielding portion 414, which is located at the end of the input end large end cover sealing mounting portion 412 away from the input end small end cover 42. The input end large end cover shielding portion 414 has a gap with the outer periphery of the planetary carrier shaft 71 and shields the end face of the first planetary carrier support bearing 45.

[0065] Preferably, the planetary gear clutch 3 includes: a second planetary carrier connecting side 31 fixedly connected to the planetary carrier shaft 71, an outer ring gear connecting side 32 fixedly connected to the outer ring gear support assembly, and a second electromagnetic coil 33 that controls the engagement and disengagement of the second planetary carrier connecting side 31 and the outer ring gear connecting side 32. The outer ring gear connecting side 32, facing away from the planetary gear set, is fixedly connected to the input end of the transmission 30. When the second electromagnetic coil 33 is energized, the second planetary carrier connecting side 31 and the outer ring gear connecting side 32 engage, disabling the differential planetary function of the planetary gear set. When the second electromagnetic coil 33 is de-energized, the second planetary carrier connecting side 31 and the outer ring gear connecting side 32 disengage, restoring the differential planetary function of the planetary gear set.

[0066] Specifically, the planetary gear clutch 3 also includes a transmission connection 34, an electromagnetic coil support bearing 35, and a second planetary carrier support bearing 36. The outer ring gear connection side 32 includes an outer ring gear connection portion 321 and an outer ring gear engagement portion 322. The outer ring gear connection portion 321 is coaxial with the planetary carrier shaft 71 and is located at the output end of the planetary carrier shaft 71 (i.e., the end within the planetary gear clutch dry chamber 13). The second planetary carrier connection side 31 and the second electromagnetic coil 33 are located on either side of the outer ring gear engagement portion 322, with the second electromagnetic coil 33 located on the side of the outer ring gear engagement portion 322 away from the planetary gear set. A second planetary carrier support bearing 36 is provided between the second planetary carrier connection side 31 and the outer ring gear connection portion 321 for rotational connection. An electromagnetic coil support 35 is provided between the second electromagnetic coil 33 and the outer ring gear connection portion 321 for rotational connection. A transmission connection 34 is provided at the center of the outer ring gear connection portion 321, away from the planetary carrier shaft 71, to securely connect the outer ring gear connection portion 321 to the input end of the transmission 30.

[0067] Preferably, the planetary gear train component 7 also includes a planet carrier flange 73, which is fixedly mounted on the planet carrier shaft 71 and is located on the side of the planet carrier 72 facing the planetary gear clutch 3. The planet carrier flange 73 is fixedly connected to the second planet carrier connection side 31 by screws to realize the output of the planet carrier 72.

[0068] Preferably, the outer ring gear support assembly includes: an outer ring gear end cover 804, an outer ring gear oil seal 805, an outer ring gear output small flange 806, and an outer ring gear output large flange 807. The outer ring gear 803 is fixedly connected to the outer ring gear connection side 32 via the outer ring gear end cover 804, the outer ring gear output small flange 806, and the outer ring gear output large flange 807. The outer ring gear oil seal 805 is disposed between the outer ring gear end cover 804 and the planetary carrier flange 73, providing a static seal when the outer ring gear end cover 804 and the planetary carrier flange 73 are relatively stationary, and assisting in dynamic sealing when the outer ring gear end cover 804 and the planetary carrier flange 73 are relatively rotating. A labyrinth seal structure is formed between the outer ring gear end cover 804 and the planetary carrier 72, providing a dynamic seal when the outer ring gear end cover 804 and the planetary carrier 72 are relatively rotating.

[0069] Preferably, a hybrid box output end support and seal 9 is provided between the hybrid box wet chamber 12 and the planetary gear clutch dry chamber 13; the hybrid box output end support and seal 9 includes: an output end large end cover 91, an output end small end cover 92, an output end oil seal 93 and an output end oil baffle plate 94; the output end large end cover 91 is fixedly arranged in the hybrid box body 1, and the output end large end cover 91 supports the outer ring gear output small flange 806; the output end small end cover 92 is fixedly arranged on the output end large end cover 91, and the output end oil seal 93 is fixedly sleeved on the outer ring gear output small flange 806, and the output end oil baffle plate 94 and the output end oil seal 93 form a dynamic seal.

[0070] Specifically, the output end cap 91 includes a large output end cap connection portion 911 and a large output end cap sealing mounting portion 912. The large output end cap connection portion 911 is fixedly connected to the output end fixing flange 122 of the hybrid case wet chamber 12 via screws. The outer ring gear support bearing 802 is mounted between the large output end cap sealing mounting portion 912 and the small outer ring gear output flange 806, ensuring rotation of the small outer ring gear output flange 806. The small output end cap 92 is fixedly connected to the large output end cap connection portion 911 via screws. An input end sealing ring 46 is positioned between the small output end cap 92 and the large output end cap sealing mounting portion 912 to form a static seal. The output end oil seal 93 and the output end oil baffle plate 94 are both located on the side of the outer ring gear support bearing 802 facing the output end small end cover 92. The output end small end cover 92 presses the output end oil baffle plate 94 against the outer ring of the outer ring gear support bearing 802. The output end oil baffle plate 94 and the output end oil seal 93 form a dynamic seal; and a labyrinth sealing structure is formed between the output end oil seal 93 and the output end small end cover 92.

[0071] Specifically, the output end large end cover 91 also includes an output end large end cover shielding portion 913, which is located at the end of the output end large end cover sealing mounting portion 912 away from the output end small end cover 92. The output end large end cover shielding portion 913 has a gap with the outer periphery of the outer gear ring output small flange 806 and shields the end face of the outer gear ring support bearing 802.

[0072] Specifically, the planetary gear clutch 3 is mounted in the planetary gear clutch dry chamber 13. The planetary carrier 72 and outer ring gear 803 connected to it are both located within the hybrid case wet chamber 12. The connection between the planetary gear clutch 3, the planetary carrier 72, and the outer ring gear 803 requires access from the hybrid case wet chamber 12 to the planetary gear clutch dry chamber 13. Therefore, the structure must ensure both transmission and sealing. This application utilizes a planetary carrier shaft 71 and a planetary carrier flange 73 to connect the planetary carrier 72 to the second planetary carrier connection side 31. Furthermore, an outer ring gear end cap 804, an outer ring gear output small flange 806, and an outer ring gear output large flange 807 are provided to connect the outer ring gear 803 to the outer ring gear connection side 32. This bypasses the hybrid case output end support and seal 9, while ensuring sealing between the hybrid case wet chamber 12 and the planetary gear clutch dry chamber 13, as well as locking and differential operation of the planetary gear set.

[0073] Preferably, an intermediate support 61 is also provided within the hybrid transmission wet chamber 12, located between the sun gear 501 and the planetary carrier 72. The side of the planetary carrier 72 facing away from the planetary clutch dry chamber 13 is connected to the intermediate support 61 via a copper oil seal 62. An intermediate lubricating oil passage 1007 is defined among the intermediate support 61, the copper oil seal 62, the planetary carrier 72, and the planetary shafts 74. The copper oil seal 62 ensures that lubricating oil enters the stationary oil passage within the transmission to lubricate the rotating planetary gears 75, the planetary gear support bearings 76, the sun gear 503, and the outer ring gear 803.

[0074] Specifically, the planet carrier 72 includes a planet carrier fixing sleeve 721, a first support plate 722, a second support plate 723, and a side support 724. The planet carrier fixing sleeve 721 is fixed to the planet carrier shaft 71 with an interference fit. The first support plate 722 is arranged around the planet carrier fixing sleeve 721 and fixed to the outer circumference of the planet carrier fixing sleeve 721. The second support plate 723 is located on one side of the planet carrier fixing sleeve 721 and is arranged opposite the first support plate 722. The side support 724 is fixed between the first support plate 722 and the second support plate 723 to connect and support the first support plate 722 and the second support plate 723. The side support 724 is provided with a plurality of planet gear clearance openings 7241. For example, corresponding to four planet gears 75, there are four planet gear clearance openings 7241 for mounting the planet gears 75. The first support plate 722 is provided with a blind hole, and the second support plate 723 is provided with a mounting hole coaxial with the blind hole. The planetary gear 75 extends through the planetary gear clearance opening 7241. The planetary shaft 74 passes through the mounting hole and then through the planetary gear support bearing 76 in the center of the planetary gear 75. The end of the planetary shaft 74 is fixed in the blind hole with an interference fit, thereby installing the planetary gear 75. The second support plate 723 is provided with a sun gear clearance hole coaxial with the planetary carrier fixing sleeve 721, allowing the sun gear 503 to enter through the sun gear clearance hole and mesh with the planetary gear 75. The planetary carrier 72 is integrally formed, with a compact structural design that helps reduce the size and weight of the planetary gear set; it also has good structural rigidity, ensuring the stable operation of the planetary gear 75. Furthermore, the planetary gear 75, planetary shaft 74, and planetary carrier 72 can be assembled into a single piece and then installed on the planetary carrier shaft 71, making assembly simpler and easier to ensure precision through machining, reducing the difficulty of assembly and debugging.

[0075] Specifically, the intermediate support 61 comprises an intermediate support fixing portion 611, an intermediate support mounting portion 612, and an intermediate support connecting portion 613. The intermediate support fixing portion 611 is screwed to the hybrid box wall at the intersection of the cylindrical and square sections of the wet chamber 12. A gearwheel support bearing 502 is provided between the intermediate support mounting portion 612 and the sun gear 501 to enable relative rotation. A gearwheel support bearing 502 is also provided between the gearwheel support bearing mounting portion 413 and the sun gear 501 for rotational connection.

[0076] Specifically, an outer ring gear support bearing seat 801 is screwed to the side of the outer ring gear 803 that is away from the planetary gear clutch dry chamber 13. Specifically, an outer ring gear support bearing seat 801 is screwed to the side of the outer ring gear 803 that is away from the outer ring gear end cover 804. An outer ring gear support bearing 802 is provided between the outer ring gear support bearing seat 801 and the intermediate support mounting portion 612 to achieve rotational connection and support the outer ring gear 803.

[0077] Specifically, the sun gear train component 5 also includes a large gear support bearing 502 and a semicircular retaining ring 504. The sun gear 503 includes a sun gear gear portion 5031, a sun gear connecting portion 5032, and a sun gear drum-shaped tooth portion 5033. After the sun gear gear portion 5031 enters the sun gear clearance hole, its teeth mesh with the planetary gears 75, and the drum-shaped teeth of the sun gear drum-shaped tooth portion 5033 mesh with the internal teeth of the sun gear 501. The sun gear connecting portion 5032 is provided with an annular groove, into which two semicircular retaining rings 504 are inserted. The semicircular retaining rings 504 are fixedly connected to the sun gear 501 via screws, thereby axially positioning the sun gear 501 relative to the sun gear 503. The sun gear 503 is loosely mounted on the planetary carrier shaft 71 and adopts a floating structure to eliminate assembly errors. The floating structure is a conventional technical method of hybrid systems and will not be described in detail here.

[0078] Specifically, the external teeth of the sun gear 501 transmit power to the speed control motor gear shaft 511 via a transition shaft assembly. The transition shaft assembly includes: a speed control motor transition gear 505, a transition shaft bearing 506, a transition shaft sleeve 507, a transition shaft 508, a transition shaft spacer 509, a transition shaft end cap 510, and a set screw 513. The transition shaft 508 is mounted on the square section of the hybrid case wet chamber 12 through a through-hole provided in the wall of the case on the input side of the square section. The transition shaft sleeve 507 is mounted on the transition shaft 508 and connected via a spline. The transition shaft spacer 509 is mounted on the transition shaft 508 and axially compresses the transition shaft sleeve 507. The transition shaft spacer 509 is connected to the transition shaft 508 via a set screw 513 to prevent the transition shaft spacer 509 from rotating. The transition shaft end cap 510 is screwed into a through-hole in the housing wall on the input side of the square segment. This cap compresses the transition shaft spacer 509 against the transition shaft 508, providing axial positioning. The speed regulating motor transition gear 505 is rotatably mounted on the transition shaft sleeve 507 via the transition shaft bearing 506. The speed regulating motor transition gear 505 meshes with the external teeth of the sun gear 501 and also with the teeth of the speed regulating motor gear shaft 511.

[0079] Specifically, the outer teeth of the outer ring gear 803 transmit power to the torque-increasing motor gear shaft 811 through the transition shaft component. The transition shaft component also includes: a torque-increasing motor transition gear 808, a transition shaft bearing 506, and a second transition shaft spacer 809. The second transition shaft spacer 809 is sleeved on the transition shaft sleeve 507. The torque-increasing motor transition gear 808 is rotatably mounted on the transition shaft sleeve 507 via the transition shaft bearing 506. The second transition shaft spacer 809 presses the inner ring of the transition shaft bearing 506. The torque-increasing motor transition gear 808 meshes with the outer teeth of the outer ring gear 803, and the torque-increasing motor transition gear 808 meshes with the teeth of the torque-increasing motor gear shaft 811. The transition shaft component adopts a structure in which the shaft is fixed and the gear rotates to ensure the installation of the transition shaft component. At the same time, it simplifies the structure of the hybrid box body 1 and fully utilizes the internal space of the speed regulating motor transition gear 505 and the torque-increasing motor transition gear 808, thereby reducing weight and volume.

[0080] Specifically, the transmission ratio between the speed regulating motor transition gear 505 and the speed regulating motor gear shaft 511 is equal to the transmission ratio between the torque increasing motor transition gear 808 and the torque increasing motor gear shaft 811, ensuring that the speed regulating motor 40 and the torque increasing motor are fully powered during pure electric drive.

[0081] Specifically, the speed regulating motor gear shaft 511 and the torque increasing motor gear shaft 811 have the same number of teeth and are both right-handed, the speed regulating motor transition gear 505 and the torque increasing motor transition gear 808 have the same number of teeth and are both left-handed, the sun gear 501 and the outer teeth of the outer ring gear 803 have the same number of teeth and are both right-handed, the inner teeth of the outer ring gear 803 and the teeth of the planetary gear 75 are left-handed, and the teeth of the sun gear 503 are right-handed.

[0082] Specifically, a mounting hole is provided in the wall of the hybrid box wet chamber 12 on the output side of the square section. The speed control motor gear shaft 511 and the torque-increasing motor gear shaft 811 are both mounted in the square section of the hybrid box wet chamber 12 through the mounting hole. The ends of the speed control motor gear shaft 511 and the torque-increasing motor gear shaft 811 that are inserted into the square section of the hybrid box wet chamber 12 are each mounted with a speed control motor gear shaft bearing 512, thereby rotatably mounting them in the wall of the hybrid box wet chamber 12 on the input side of the square section. The ends of the speed control motor gear shaft 511 and the torque-increasing motor gear shaft 811 corresponding to the output side of the square section of the hybrid box wet chamber 12 are rotatably mounted to a motor shaft bearing seat 813 via the torque-increasing motor gear shaft bearing 812. The motor shaft bearing seat 813 is screwed into the mounting hole and prevented from rotating by a set screw 513.

[0083] Specifically, the speed regulating motor gear shaft 511 and the torque increasing motor gear shaft 811 are arranged vertically, with the speed regulating motor gear shaft 511 being the upper portion and the torque increasing motor gear shaft 811 being the lower portion. This arrangement of the speed regulating motor 40 and the torque increasing motor 811 in a vertical manner fully utilizes the installation space under the EMU vehicle and reduces the volume and weight of the hybrid box body 1.

[0084] Specifically, the planet carrier shaft 71 is supported on the input end cap 41 via the first planet carrier support bearing 45. The planet carrier flange 73 is supported on the outer ring gear connection side 32 via the second planet carrier support bearing 36. The outer ring gear output small flange 806 is supported on the output end cap 91 via the outer ring gear support bearing 802, thereby providing stable support for the entire planetary gear train component 7. The planet carrier 72 and planet carrier flange 73 are both mounted on the planet carrier shaft 71 using a hydraulic taper fit. The planet shaft 74 is connected to the planet carrier 72 using a liquid nitrogen interference fit, which maximizes space savings and achieves a more compact structure.

[0085] Specifically, the planet carrier flange 73 includes a planet carrier flange fixing portion 731 and a planet carrier flange connecting portion 732. The planet carrier flange fixing portion 731 is mounted on the planet carrier shaft 71 via a hydraulic taper fit. The planet carrier flange connecting portion 732 is screwed to the second planet carrier connecting side 31. The first support plate 722 of the planet carrier 72 is located on the side of the planet gear 75 facing the planet carrier flange connecting portion 732. The planet carrier flange connecting portion 732 and the first support plate 722 form an annular groove-shaped clearance installation space 78.

[0086] The outer ring gear end cover 804 includes an outer ring gear end cover fixing portion 8041, an outer ring gear end cover connecting portion 8042, and an outer ring gear end cover sealing portion 8043. The outer ring gear end cover fixing portion 8041 is screwed to the side of the outer ring gear 803 facing the planetary gear clutch dry chamber 13. The outer ring gear end cover connecting portion 8042 is screwed to the outer ring gear output small flange 806. The outer ring gear end cover sealing portion 8043 extends into the clearance installation space 78. An outer ring gear oil seal 805 is installed between the outer ring gear end cover sealing portion 8043 and the planet carrier flange fixing portion 731 for sealing. The outer ring gear end cover sealing portion 8043 and the portion facing the first support plate 722 of the planet carrier 72 form a labyrinth seal structure.

[0087] The outer ring gear output flange 806 includes a first connecting portion 8061 and a second connecting portion 8062, which form an L-shape. The first connecting portion 8061 is positioned around the planetary carrier flange connecting portion 732 and the clearance installation space 78. The outer ring gear end cover connecting portion 8042 is screwed to the end of the first connecting portion 8061, making the structure more compact. The second connecting portion 8062 is located on the side of the output end cover 92 away from the outer ring gear support bearing 802. This strengthens the sealing effect of the labyrinth seal formed between the output end oil seal 93 and the output end cover 92, and presses the output end oil seal 93 against the inner ring of the outer ring gear support bearing 802.

[0088] The outer gear ring output large flange 807 includes a large flange first connection part 8071 and a large flange second connection part 8072. The large flange first connection part 8071 is connected to the small flange second connection part 8062 by screws, and the large flange second connection part 8072 is connected to the outer gear ring connection side 32 by screws.

[0089] Specifically, the hybrid box wet chamber 12 is provided with a hybrid box lubrication system 10, which includes a lubrication pump 1001, an oil suction line 1002, and an intermediate planetary gear train lubrication line 1005. A box oil line 1006 is provided in the square section of the hybrid box wet chamber 12.

[0090] An input end lubricating oil circuit 1004 is provided on the box body at the input end of the hybrid box wet chamber 12, the output end of the transition shaft 508, the transition shaft sleeve 507, the input end fixing flange 121 and the input end large end cover 41; the input end lubricating oil circuit 1004 is provided with an oil outlet for the speed regulating motor gear shaft bearing, an oil outlet for the transition shaft bearing, an oil outlet for the large gear support bearing, an oil outlet for the sun gear drum gear portion and an oil outlet for the first planetary carrier support bearing.

[0091] An output end lubricating oil circuit 1003 is provided on the box body at the output end of the hybrid box wet chamber 12, the motor shaft bearing seat 813, the input end of the transition shaft 508, the transition shaft sleeve 507, the output end fixing flange 122 and the output end large end cover 91; the output end lubricating oil circuit 1003 is provided with an oil outlet for the torque-increasing motor gear shaft bearing, an oil outlet for the transition shaft bearing and an oil outlet for the outer gear ring support bearing.

[0092] An intermediate lubricating oil passage 1007 is provided in the intermediate support 61 , the copper oil seal 62 , the second support plate 723 and the planetary shaft 74 . The intermediate lubricating oil passage 1007 is provided with an outer gear ring support bearing oil outlet, a large gear support bearing oil outlet and a planetary gear support bearing oil outlet.

[0093] Lubrication pump 1001 delivers lubricating oil to suction line 1002. Suction line 1002 connects to case oil circuit 1006 via a connector. Case oil circuit 1006 connects to input lubricating oil circuit 1004 and output lubricating oil circuit 1003. Suction line 1002 delivers lubricating oil to input lubricating oil circuit 1004 and output lubricating oil circuit 1003 via case oil circuit 1006, where it is then sprayed out of various oil outlets for lubrication. Intermediate planetary gear train lubricating line 1005 connects to case oil circuit 1006 via a connector at one end and to intermediate lubricating oil circuit 1007 via a connector at the other end. Lubricating oil enters intermediate lubricating oil circuit 1007 through intermediate planetary gear train lubricating line 1005 and is then sprayed out of various oil outlets for lubrication.

[0094] The input end lubricating oil circuit 1004 lubricates the speed regulating motor gear shaft bearing 512, the transition shaft bearing 506 of the torque increasing motor transition gear 808, the large gear support bearing 502 mounted on the input end large end cover 41, the sun gear drum gear portion 5033 and the first planet carrier support bearing 45;

[0095] The output end lubricating oil circuit 1003 lubricates the torque increasing motor gear shaft bearing 812, the transition shaft bearing 506 of the speed regulating motor transition gear 505, and the outer gear ring support bearing 802 installed on the output end large end cover 91;

[0096] The intermediate lubricating oil passage 1007 lubricates the outer gear ring support bearing 802 mounted on the outer gear ring support bearing seat 801, the large gear support bearing 502 mounted on the intermediate support 61, and the planetary gear support bearing 76;

[0097] The diesel engine connection side support bearing 25, the electromagnetic coil support bearing 35 and the second planetary carrier support bearing 36 are all self-lubricating bearings; the speed regulating motor transition gear 505 and the torque increasing motor transition gear 808 are both splash lubricated.

[0098] Specifically, the intermediate lubricating oil circuit 1007 comprises an intermediate support section, an oil ring, and a planetary shaft section. The intermediate support section is defined within the intermediate support 61, and the planetary shaft section is defined within the planetary shaft 74. An oil groove 7231 is defined within the second support plate 723, into which the copper oil seal 62 is inserted, forming an oil ring. A connecting port is defined within the copper oil seal 62, connecting the intermediate support section and the oil ring. The intermediate lubricating oil circuit 1007 directs lubricating oil from the intermediate planetary gear train lubrication line 1005 into the interior of the second support plate 723, where it is used to lubricate the planetary gear support bearings 76, the planetary gears 75, the sun gear 503, and the outer ring gear 803.

[0099] Specifically, the lubrication pump 1001 is installed within the hybrid box wet chamber 12 through the bottom opening. A sealing cap is then installed to seal the bottom opening. A lubrication pump driving gear 810 is coaxially secured to the end of the torque-increasing motor transition gear 808 via screws. The lubrication pump driving gear 810 rotates with the torque-increasing motor transition gear 808 and meshes with the lubrication pump driven gear on the lubrication pump 1001. Regardless of the drive mechanism, the torque-increasing motor transition gear 808 is always connected to the hybrid box's input and output, ensuring that the hybrid box lubrication system 10 remains operational and providing oil supply during hybrid box operation.

[0100] Example 2:

[0101] A hybrid powertrain system includes the EMU hybrid transmission of Example 1, as well as a diesel engine 20, a power battery 60, a speed-regulating motor 40, a torque-increasing motor, a transmission 30, and an electronic control system 70. The diesel engine 20 comprises a six-cylinder horizontal diesel engine and auxiliary systems. The power battery 60 comprises a battery and a thermal management system. The transmission 30 employs a six-speed automatic transmission. The speed-regulating motor 40 and the torque-increasing motor both employ high-speed permanent magnet motors. The diesel engine 20, speed-regulating motor 40, torque-increasing motor, transmission 30, and electronic control system 70 are integrated into a hybrid power pack and suspended beneath the EMU via a mounting frame and suspension system, directly driving the EMU via an axle gearbox. The power battery 60 is integrated into a battery pack and mounted on the EMU roof. The power battery 60 stores energy and, through the hybrid power pack, drives the EMU in a purely electric or hybrid manner. The EMU hybrid transmission includes two parallel-shaft gear sets, one differential planetary gear set, and two dry electromagnetic clutches. The speed-regulating motor 40 and the torque-increasing motor utilize high-speed permanent magnet motors, which are compact and lightweight. They are connected to the transmission system via two parallel-shaft gear sets at reduced speed. The differential planetary gear set allows the speed-regulating motor 40 to regulate the speed of the diesel engine 20, achieving speed decoupling between the diesel engine 20 and the transmission 30. This application not only enables the diesel engine 20, the speed-regulating motor 40, and the torque-increasing motor to operate independently as pure diesel or pure electric, but also meets hybrid drive requirements. Furthermore, the speed-regulating motor 40 regulates the speed of the diesel engine 20, while the torque-increasing motor increases the torque of the diesel engine 20, ensuring that the diesel engine 20 always operates in a high-efficiency, low-consumption, low-emission, high-torque range, thereby achieving energy conservation, emission reduction, and environmental protection. This also ensures that the size and weight are minimized.

[0102] The assembly sequence of this application device is as follows:

[0103] a. Install and fix the lubrication pump driving gear 810 on the torque-increasing motor transition gear 808;

[0104] b. Install the transition shaft bearing 506 into the speed regulating motor transition gear 505 and the torque increasing motor transition gear 808 respectively;

[0105] c. Install the two sets of assemblies assembled in step b and the transition shaft spacer 809 onto the transition shaft sleeve 507;

[0106] d. Place the hybrid case 1 vertically with the output end facing downward and the input end facing upward. Connect the assembly assembled in step c to the transition shaft 508 via a spline, and install it on the hybrid case 1 via the transition shaft spacer 1 509 and the transition shaft end cover 510. The axial installation dimension is adjusted by the transition shaft spacer 1 509, the transition shaft spacer 2 809, and the transition shaft end cover 510. The stop screw 513 prevents the transition shaft 508, the transition shaft sleeve 507, and the transition shaft spacer 1 509 from rotating.

[0107] e. Place the hybrid box body 1 vertically with the output end facing upward and the input end facing downward; install the speed regulating motor gear shaft bearing 512 and the torque increasing motor gear shaft bearing 812 on the speed regulating motor gear shaft 511;

[0108] f. Install the speed regulating motor gear shaft bearing 512 and the torque increasing motor gear shaft bearing 812 on the torque increasing motor gear shaft 811, and install them together with the motor shaft bearing seat 813 in the hybrid box body 1. Use the set screw 513 to prevent the motor shaft bearing seat 813 from rotating;

[0109] g. Install the output end small end cover 92, output end oil seal 93, output end oil baffle 94, outer gear ring support bearing 802 and output end large end cover 91 on the outer gear ring output small flange 806 in sequence;

[0110] h. Install the assembly assembled in step g to the output end fixing flange 122 of the hybrid box wet chamber 12 through the output end large end cover 91;

[0111] i. Install the outer gear ring output large flange 807 onto the outer gear ring output small flange 806;

[0112] j Install the planet carrier flange 73 on the planet carrier shaft 71 by hydraulic pressure;

[0113] k. Connect the assembly assembled in step j to the second planet carrier connection side 31 of the planetary gear clutch 3 via the planet carrier flange 73;

[0114] l Install the assembly assembled in step k onto the outer gear ring output flange 807. Connect the outer gear ring output flange 807 to the outer gear ring connection side 32 of the planetary gear clutch 3 to complete the installation of the planetary gear clutch 3.

[0115] Install the outer gear ring end cover 804 on the outer gear ring 803, and install the outer gear ring oil seal 805 on the outer gear ring end cover 804;

[0116] n. Place the hybrid gearbox body 1 vertically with the output end facing downward and the input end facing upward; install the assembly assembled in step m on the outer gear output small flange 806 through the outer gear end cover 804, and simultaneously complete the installation between the outer gear oil seal 805 and the planet carrier flange 73 using tools;

[0117] Install the planetary gear support bearing 76 on the planetary gear 75, and install the planetary shaft 74, planetary gear 75, and planetary gear support bearing 76 on the planetary carrier 72 using liquid nitrogen;

[0118] p. Install the assembly assembled in step o on the planet carrier shaft 71 through the planet carrier 72 by hydraulic pressure;

[0119] q Install the outer gear ring support bearing seat 801 on the outer gear ring 803;

[0120] Install the outer gear ring support bearing 802 and the copper oil seal 62 on the intermediate support 61;

[0121] s. Install the assembly assembled in step r on the hybrid case 1 through the intermediate support 61, so that the outer ring gear support bearing 802 is assembled to the outer ring gear support bearing seat 801, and the copper oil seal 62 is assembled to the second support plate 723;

[0122] Install the gear support bearing 502 on the sun gear 501, and connect the sun gear 503 to the sun gear 501 through the semicircular retaining ring 504;

[0123] u Install the assembly assembled in step t on the intermediate support 61 through the large gear support bearing 502, so that the sun gear 503 is sleeved on the planet carrier shaft 71;

[0124] v Install the input end cover 41 on the input end fixing flange 121 of the hybrid box wet chamber 12, so that the input end cover 41 is connected to the large gear support bearing 502;

[0125] w Install the first planet carrier support bearing 45, the input end oil baffle 44, the input end oil seal 43, the input end sealing ring 46 and the input end small end cover 42 between the planet carrier shaft 71 and the input end large end cover 41 in sequence;

[0126] x Install and fix the diesel engine clutch 2 on the spline at the end of the planetary carrier shaft 71;

[0127] After assembling the lubrication pump 1001 and the driven gear of the lubrication pump, install them into the hybrid case 1 from the bottom of the hybrid case 1;

[0128] z connects the lubrication pump 1001, the oil suction pipeline 1002, the intermediate planetary gear train lubrication pipeline 1005, the box oil circuit 1006 and the intermediate lubrication oil circuit 1007.

[0129] Working principle of this application device:

[0130] 1. When the diesel engine clutch 2 and the planetary gear clutch 3 are engaged at the same time, the diesel engine 20 is connected to the system and the planetary gear set is locked. When the speed regulating motor 40 and the torque increasing motor controller lose power, pure diesel drive can be achieved.

[0131] 2. When the diesel engine clutch 2 and the planetary gear clutch 3 are engaged simultaneously, the diesel engine 20 is connected to the system, the planetary gear set is locked, and the speed regulating motor 40 and the torque increasing motor are engaged individually or simultaneously, a P2 type oil-electric hybrid drive can be achieved;

[0132] 3. When the diesel engine clutch 2 is disengaged and the planetary gear clutch 3 is engaged, the diesel engine 20 is disengaged from the system, the planetary gear set is locked, and the speed regulating motor 40 and the torque increasing motor are engaged individually or simultaneously, thereby achieving pure electric drive;

[0133] 4. When the diesel engine clutch 2 is engaged and the planetary gear clutch 3 is disengaged, the diesel engine 20 is connected to the system, the planetary gear set is differentially driven, and the speed regulating motor 40 and the torque increasing motor are engaged individually or simultaneously, achieving hybrid drive. When the speed regulating motor 40 is engaged, the speed of the diesel engine 20 can be adjusted, achieving speed decoupling between the EMU diesel engine 20 and the transmission 30, allowing the diesel engine 20 to always operate in a high-efficiency, low-consumption, low-emission, high-torque speed range, achieving the goals of energy conservation, emission reduction, and environmental protection. When the torque increasing motor is engaged, the output torque can be increased, improving the EMU's acceleration performance, and achieving the goal of optimizing the EMU's travel performance.

[0134] 5. When the diesel engine clutch 2 is engaged, the diesel engine 20 is connected to the system. Under the two hybrid drive conditions of 2 and 4, the speed regulating motor 40 and the torque increasing motor can generate electricity separately or simultaneously under the regulation of the controller to realize the system driving charging;

[0135] 6. When the diesel engine clutch 2 is disengaged and the planetary gear clutch 3 is engaged, the diesel engine 20 is disengaged from the system, the planetary gear set is locked, and the transmission system is in the pure electric drive condition 3. The speed regulating motor 40 and the torque increasing motor can generate electricity separately or simultaneously under the regulation of the controller to realize braking and charging of the EMU.

[0136] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hybrid box for an EMU, characterized in that: It comprises a hybrid box body (1), wherein the hybrid box body (1) comprises a diesel engine clutch dry chamber (11), a hybrid box wet chamber (12), and a planetary gear clutch dry chamber (13) arranged in sequence; The diesel engine clutch dry chamber (11) is an input end, in which a diesel engine clutch (2) for connecting to a diesel engine (20) is arranged; The planetary gear clutch dry chamber (13) is an output end, in which a planetary gear clutch (3) for controlling the differential of the planetary gears and connecting to the gearbox (30) is arranged; A planetary gear set is provided in the hybrid box wet chamber (12), the planetary gear set comprising: a sun gear train component (5), a planetary gear train component (7), and an outer ring gear system component (8); the diesel engine clutch (2) and the planetary gear clutch (3) are both connected to the planetary gear train component (7), and the outer ring gear system component (8) is connected to the planetary gear clutch (3); A speed regulating motor gear shaft (511) for connecting to the speed regulating motor (40) and a torque increasing motor gear shaft (811) for connecting to the torque increasing motor are also provided in the hybrid box wet chamber (12); the outer gear ring system component (8) is also in transmission connection with the torque increasing motor gear shaft (811), and the sun gear system component (5) is in transmission connection with the speed regulating motor gear shaft (511); The sun gear train component (5) comprises a sun gear (503) and a sun gear (501); the inner teeth of the sun gear (501) are meshed with the drum-shaped teeth of the sun gear (503); and the sun gear (501) is in transmission connection with the gear shaft (511) of the speed regulating motor; The planetary gear train component (7) comprises: a planetary carrier shaft (71), a planetary carrier (72), a planetary shaft (74) and a planetary wheel (75); the planetary carrier (72) is fixedly sleeved on the planetary carrier shaft (71), the planetary shaft (74) is fixedly arranged on the planetary carrier (72), and the planetary wheel (75) is rotatably arranged on the planetary shaft (74) and meshes with the sun wheel (503); The outer gear ring system component (8) includes an outer gear ring (803) and an outer gear ring support assembly for supporting the outer gear ring (803), wherein the inner teeth of the outer gear ring (803) are meshed with the planetary gear (75), and the outer teeth are in transmission connection with the torque-increasing motor gear shaft (811); The planetary gear clutch (3) comprises: a second planetary carrier connection side (31) fixedly connected to the planetary carrier shaft (71), an outer ring gear connection side (32) fixedly connected to the outer ring gear support assembly, and a second electromagnetic coil (33) for controlling the engagement and separation of the second planetary carrier connection side (31) and the outer ring gear connection side (32), wherein the outer ring gear connection side (32) is fixedly connected to the input end of the gearbox (30) on a side away from the planetary gear set; The planetary gear train component (7) further includes a planet carrier flange (73), the planet carrier flange (73) being fixedly sleeved on the planet carrier shaft (71) and located on a side of the planet carrier (72) facing the planetary gear clutch (3), and the planet carrier flange (73) being fixedly connected to the second planet carrier connection side (31); The outer gear ring support assembly comprises: an outer gear ring end cover (804), an outer gear ring oil seal (805), an outer gear ring output small flange (806) and an outer gear ring output large flange (807); the outer gear ring (803) is fixedly connected to the outer gear ring connection side (32) via the outer gear ring end cover (804), the outer gear ring output small flange (806) and the outer gear ring output large flange (807); the outer gear ring oil seal (805) is arranged between the outer gear ring end cover (804) and the planet carrier flange (73), and a labyrinth seal structure is formed between the outer gear ring end cover (804) and the planet carrier (72); A hybrid case output end support and seal (9) is provided between the hybrid case wet chamber (12) and the planetary gear clutch dry chamber (13); the hybrid case output end support and seal (9) comprises: an output end large end cover (91), an output end small end cover (92), an output end oil seal (93) and an output end oil baffle (94); the output end large end cover (91) is fixedly arranged in the hybrid case body (1), and the output end large end cover (91) supports the outer gear ring output small flange (806); the output end small end cover (92) is fixedly arranged on the output end large end cover (91), the output end oil seal (93) is fixedly sleeved on the outer gear ring output small flange (806), the output end oil baffle (94) and the output end oil seal (93) form a dynamic seal, and a labyrinth seal structure is formed between the output end oil seal (93) and the output end small end cover (92).

2. The hybrid box of the EMU according to claim 1, characterized in that: The diesel engine clutch (2) comprises: a diesel engine connection side (21) fixedly connected to a flywheel of a diesel engine (20), a first planetary carrier connection side (22) transmission-connected to a planetary carrier shaft (71), and a first electromagnetic coil (23) for controlling the engagement and separation of the diesel engine connection side (21) and the first planetary carrier connection side (22).

3. The hybrid box of the EMU according to claim 2, characterized in that: A hybrid box input end support and seal (4) is provided between the hybrid box wet chamber (12) and the diesel engine clutch dry chamber (11); the hybrid box input end support and seal (4) comprises: an input end large end cover (41), an input end small end cover (42), an input end oil seal (43), an input end oil baffle (44) and a first planetary carrier support bearing (45); the input end large end cover (41) is fixedly arranged in the hybrid box body (1), and the input end large end cover (41) supports the sun gear (501); the first planetary carrier support bearing (45) is arranged between the input end large end cover (41) and the planetary carrier shaft (71); the input end small end cover (42) is fixedly arranged on the input end large end cover (41), the input end oil seal (43) is fixedly sleeved on the planetary carrier shaft (71), and the input end oil baffle (44) and the input end oil seal (43) form a dynamic seal.

4. The hybrid box of an EMU according to claim 3, characterized in that: An intermediate support (61) is further provided in the hybrid box wet chamber (12), and the intermediate support (61) is located between the sun gear (501) and the planet carrier (72); the side of the planet carrier (72) away from the planetary gear clutch dry chamber (13) is connected to the intermediate support (61) via a copper oil seal (62); and an intermediate lubricating oil passage (1007) is provided among the intermediate support (61), the copper oil seal (62), the planet carrier (72) and the planet shaft (74).

5. A hybrid power transmission system, characterized in that: The EMU hybrid box comprises the EMU hybrid box according to any one of claims 1 to 4, and further comprises a diesel engine (20), a power battery (60), a speed regulating motor (40), a torque increasing motor, a gearbox (30) and an electronic control system (70); the diesel engine (20), the speed regulating motor (40), the torque increasing motor, the gearbox (30) and the electronic control system (70) are integrated into a hybrid power pack and suspended under the EMU through a mounting frame and a suspension system, and directly drive the EMU through an axle gearbox; the power battery (60) is integrated into a battery pack and installed on the roof of the EMU, and the power battery (60) stores energy and drives the EMU purely electrically or hybrid-driven through the hybrid power pack.

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