Motor train unit hybrid power box and hybrid power transmission system

Abstract

The invention discloses a motor train unit hybrid power box and a hybrid power transmission system, and the motor train unit hybrid power box comprises a hybrid power box body which comprises a diesel engine clutch dry chamber, a hybrid power box wet chamber and a planetary gear clutch dry chamber; a diesel engine clutch for connecting a diesel engine is arranged in the diesel engine clutch dry chamber; a planetary gear clutch used for controlling differential motion of a planetary gear and connected with a gearbox is arranged in the planetary gear clutch dry chamber; a planetary gear set is arranged in the hybrid box wet chamber and comprises a sun gear train component, a planetary gear train component and an outer gear ring system component; the diesel engine clutch and the planetary gear clutch are both connected with the planetary gear train component, and the outer gear ring system component is connected with the planetary gear clutch. An adjustable-speed motor gear shaft and a torque-increasing motor gear shaft are further arranged in the hybrid box wet chamber; the outer gear ring system component is in transmission connection with a torque increasing motor gear shaft, and the sun gear system component is in transmission connection with a speed regulating motor gear shaft. The size and weight of the hybrid power box are reduced, and the hybrid power box can be matched with the under-train installation space of the motor train unit.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission of EMUs, and particularly to an EMU hybrid box and a hybrid power transmission system. Background Art

[0002] With the promotion and implementation of energy conservation, environmental protection and the dual-carbon concept, diesel-powered EMUs are gradually developing towards hybrid EMUs. The power sources of the EMUs are the power battery and the traditional diesel engine at the same time. While driving the vehicle, the diesel engine charges the power battery, enabling functions such as pure-electric start, hybrid acceleration, coasting and braking charging.

[0003] Although the parallel hybrid system is widely used in the field of passenger cars (such as Toyota Prius), since railway EMUs are far larger than passenger cars in terms of vehicle weight, traction power, traction torque, etc., the power transmission methods adopted in the field of passenger cars, such as the combination of multiple planetary rows, the combination of multiple wet clutches and brakes, and the integration of the hybrid box with the gearbox and the motor, cannot meet the requirements of EMUs. The existing publicly disclosed hybrid system in the EMU field adopts the form of a separate hybrid box supporting the gearbox and the motor. However, due to the limited space under the vehicle of the EMU, extremely high requirements are imposed on the volume and weight of the hybrid box of the hybrid system. Therefore, it is necessary to design a hybrid box that can match the installation space under the vehicle of the EMU. Summary of the Invention

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

[0005] To achieve the above object, the technical solution of the present invention is as follows: An EMU hybrid box includes a hybrid box body, which includes a diesel engine clutch dry chamber, a hybrid box wet chamber and a planetary gear clutch dry chamber arranged in sequence; The diesel engine clutch dry chamber is the input end, and a diesel engine clutch for connecting the diesel engine is arranged therein; The planetary gear clutch dry chamber is the output end, and a planetary gear clutch for controlling planetary gear differential and connecting the gearbox is arranged therein; A planetary gear set is arranged in the hybrid box wet chamber, and the planetary gear set includes: a sun gear system component, a planetary gear system component and an outer gear ring system component; both the diesel engine clutch and the planetary gear clutch are connected to the planetary gear system component, and the outer gear ring system component is connected to the planetary gear clutch; A speed regulation motor gear shaft for connecting the speed regulation motor and a torque increasing motor gear shaft for connecting the torque increasing motor are also arranged in the hybrid box wet chamber; the outer gear ring system component is also in transmission connection with the torque increasing motor gear shaft, and the sun gear system component is in transmission connection with the speed regulation motor gear shaft.

[0006] Preferably, the sun gear train components include a sun gear and a large sun gear; the internal teeth of the large sun gear mesh with the crowned teeth of the sun gear, and the large sun gear is drivingly connected to the gear shaft of the speed regulation motor; The planetary gear train components include: a planetary carrier shaft, a planetary carrier, planetary shafts and planetary gears; the planetary carrier is fixedly sleeved on the planetary carrier shaft, the planetary shafts are fixedly arranged on the side of the planetary carrier away from the dry chamber of the planetary gear clutch, and the planetary gears are rotatably arranged on the planetary shafts and mesh with the sun gear; The external gear ring system components include an external gear ring and an external gear ring support assembly for supporting the external gear ring. The internal teeth of the external gear ring mesh with the planetary gears, and the external teeth are drivingly connected to the gear shaft of the torque increasing motor.

[0007] Preferably, the diesel engine clutch includes: a diesel engine connection side fixedly connected to the diesel engine flywheel, a first planetary carrier connection side drivingly connected to the planetary carrier shaft, and a first electromagnetic coil for controlling the engagement and separation of the diesel engine connection side and the first planetary carrier connection side.

[0008] Preferably, there is a support and seal for the input end of the hybrid transmission between the wet chamber of the hybrid transmission and the dry chamber of the diesel engine clutch. The support and seal for the input end of the hybrid transmission includes: an input end large end cover, an input end small end cover, an input end oil seal, an input end oil baffle and a planetary carrier support bearing; the input end large end cover is fixedly arranged in the hybrid transmission housing, and the input end large end cover supports the large 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 and the input end oil seal form a dynamic seal.

[0009] Preferably, the planetary gear clutch includes: a second planetary carrier connection side fixedly connected to the planetary carrier shaft, an external gear ring connection side fixedly connected to the external gear ring support assembly, and a second electromagnetic coil for controlling the engagement and separation of the second planetary carrier connection side and the external gear ring connection side. The side of the external gear ring connection side away from the planetary gear set is fixedly connected to the input end of the transmission.

[0010] Preferably, the planetary gear train components further include a planetary carrier flange. The planetary carrier flange is fixedly sleeved on the planetary carrier shaft and is located on the side of the planetary carrier facing the planetary gear clutch. The planetary carrier flange is fixedly connected to the second planetary carrier connection side.

[0011] Preferably, the external gear ring support assembly includes: an external gear ring end cover, an external gear ring oil seal, an external gear ring output small flange and an external gear ring output large flange; the external gear ring is fixedly connected to the external gear ring connection side through the external gear ring end cover, the external gear ring output small flange and the external gear ring output large flange; the external gear ring oil seal is arranged between the external gear ring end cover and the planetary carrier flange, and a labyrinth seal structure is formed between the external gear ring end cover and the planetary carrier.

[0012] Preferably, a support and seal for the output end of the hybrid transmission case are provided between the wet chamber of the hybrid transmission case and the dry chamber of the planetary gear clutch; the support and seal for the output end of the hybrid transmission case include: a large end cover at the output end, a small end cover at the output end, an oil seal at the output end, and an oil baffle at the output end; the large end cover at the output end is fixedly arranged inside the hybrid transmission case body, and the large end cover at the output end supports the small flange of the output of the external gear ring; the small end cover at the output end is fixedly arranged on the large end cover at the output end, the oil seal at the output end is fixedly sleeved on the small flange of the output of the external gear ring, and the oil baffle at the output end and the oil seal at the output end form a dynamic seal.

[0013] Preferably, an intermediate support is also arranged inside the wet chamber of the hybrid transmission case, and the intermediate support is located between the large sun gear and the planet carrier; one side of the planet 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 path is provided in the intermediate support, the copper oil seal, the planet carrier, and the planet shaft.

[0014] A hybrid power transmission system includes the aforementioned EMU hybrid transmission case, and also includes a diesel engine, a power battery, a speed regulating motor, a torque increasing motor, a gearbox, and an electric control system; the diesel engine, the speed regulating motor, the torque increasing motor, the gearbox, and the electric 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 an axle gearbox; the power battery is integrated with a battery pack and installed on the roof of the EMU, and the power battery stores energy and drives the EMU purely electrically or in a hybrid mode through the hybrid power pack.

[0015] Beneficial effects: First, the EMU hybrid transmission case disclosed in this application sets the hybrid transmission case body as a dry chamber of the diesel engine clutch, a wet chamber of the hybrid transmission case, and a dry chamber of the planetary gear clutch. A diesel engine clutch is arranged in the dry chamber of the diesel engine clutch, a planetary gear clutch is arranged in the dry chamber of the planetary gear clutch, and a planetary gear set is arranged in the wet chamber of the hybrid transmission case to realize the connection of the diesel engine clutch, the planetary gear clutch, the gear shaft of the speed regulating motor, and the gear shaft of the torque increasing motor, thereby realizing the hybrid output of power; reducing the volume and weight of the hybrid transmission case, and being able to match the installation space under the EMU. Second, the hybrid power transmission system disclosed in this application can realize driving the EMU purely by the diesel engine, purely electrically, or in a hybrid mode. Description of the drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic structural diagram of the EMU hybrid transmission case disclosed in Embodiment 1 of the present invention; Figure 2 Cross-sectional schematic of the hybrid box of the EMU disclosed in Embodiment 1 of the present invention Figure 1 ; Figure 3 is Figure 2 Partial enlarged view of A in Figure 4 Cross-sectional schematic of the hybrid box of the EMU disclosed in Embodiment 1 of the present invention Figure 2 ; Figure 5 is Figure 4 Partial enlarged view of B in Figure 6 Cross-sectional schematic of the hybrid box of the EMU disclosed in Embodiment 1 of the present invention Figure 3 ; Figure 7 is Figure 6 Partial enlarged view of C in Figure 8 Cross-sectional schematic of the hybrid box of the EMU disclosed in Embodiment 1 of the present invention Figure 4 ; Figure 9 is Figure 8 Partial enlarged view of D in Figure 10 Structural schematic of the planet carrier of the hybrid box of the EMU disclosed in Embodiment 1 of the present invention Figure 1 ; Figure 11 Structural schematic of the planet carrier of the hybrid box of the EMU disclosed in Embodiment 1 of the present invention Figure 2 ; Figure 12 Cross-sectional schematic of the planet carrier of the hybrid box of the EMU disclosed in Embodiment 1 of the present invention; Figure 13 Structural schematic of the hybrid power transmission system disclosed in Embodiment 2 of the present invention; Figure 14 Structural schematic of the hybrid power pack of the hybrid power transmission system disclosed in Embodiment 2 of the present invention.

[0018] 1. Hybrid box housing; 11. Dry chamber of diesel engine clutch; 12. Wet chamber of hybrid box; 121. Input end fixed flange; 122. Output end fixed flange; 13. Dry chamber of planetary gear clutch 2. Diesel engine clutch; 21. Diesel engine connection side; 22. First planet carrier connection side; 221. First planet carrier connection part; 222. First planet carrier engagement part; 23. First electromagnetic coil; 24. Diesel engine flywheel connection part; 25. Diesel engine connection side support bearing 3. Planetary gear clutch; 31. Second planet carrier connection side; 32. Ring gear connection side; 321. Ring gear connection portion; 322. Ring gear engagement portion; 33. Second electromagnetic coil; 34. Transmission connection location; 35. Electromagnetic coil support bearing; 36. Second planet carrier support bearing; 4. Hybrid box input end support and sealing; 41. Input end large end cover; 411. Input end large end cover connection portion; 412. Input end large end cover sealing and installation portion; 413. Large gear support bearing installation 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 sealing ring; 5. Sun gear train components; 501. Sun large gear; 502. Large gear support bearing; 503. Sun gear; 5031. Sun gear gear portion; 5032. Sun gear connection portion; 5033. Sun gear crowned tooth portion; 504. Half ring; 505. Speed control motor intermediate gear; 506. Intermediate shaft bearing; 507. Intermediate shaft bushing; 508. Intermediate shaft; 509. Intermediate shaft spacer one; 510. Intermediate shaft end cover; 511. Speed control motor gear shaft; 512. Speed control motor gear shaft bearing; 513. Set screw; 61. Intermediate support; 611. Intermediate support fixing portion; 612. Intermediate support installation portion; 613. Intermediate support connection portion; 62. Copper oil seal; 7. Planet gear train components; 71. Planet carrier shaft; 72. Planet carrier; 721. Planet carrier fixing sleeve; 722. First support disk; 723. Second support disk; 7231. Oil groove; 724. Side support; 7241. Planet gear relief 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. Relief installation space; 8. Ring gear train components; 801. Ring gear support bearing seat; 802. Ring gear support bearing; 803. Ring gear; 804. Ring gear end cover; 8041. Ring gear end cover fixing portion; 8042. Ring gear end cover connection portion; 8043. Ring gear end cover sealing portion; 805. Ring gear oil seal; 806. Ring gear output small flange; 8061. Small flange first connection portion; 8062. Small flange second connection portion; 807. Ring gear output large flange; 8071. Large flange first connection portion; 8072. Large flange second connection portion; 808. Torque increasing motor intermediate gear; 809. Intermediate shaft spacer two; 810. Lubricating pump driving gear; 811. Torque increasing motor gear shaft; 812. Torque increasing motor gear shaft bearing; 9. Output end support and seal of the hybrid transmission case; 91. Large end cover of the output end; 911. Connection part of the large end cover of the output end; 912. Sealed installation part of the large end cover of the output end; 913. Shielding part of the large end cover of the output end; 92. Small end cover of the output end; 93. Output end oil seal; 94. Output end oil baffle plate; 10. Lubrication system of the hybrid transmission case; 1001. Lubrication pump; 1002. Suction oil pipeline; 1003. Lubricating oil pipeline at the output end; 1004. Lubricating oil pipeline at the input end; 1005. Lubricating pipeline for the intermediate planetary gear train; 1006. Oil pipeline of the case; 1007. Intermediate lubricating oil pipeline; 20. Diesel engine; 30. Gearbox; 40. Speed control motor; 60. Power battery; 70. Electric control system. Detailed implementation manners

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment 1: A hybrid transmission case for a multiple unit train, in combination with Figures 1 - 14 as shown, includes a hybrid transmission case body 1. The hybrid transmission case body 1 includes a diesel engine clutch dry chamber 11, a hybrid transmission case wet chamber 12, and a planetary gear clutch dry chamber 13 arranged in sequence. The diesel engine clutch dry chamber 11 is the input end, and a diesel engine clutch 2 for connecting the diesel engine 20 is arranged therein. The planetary gear clutch dry chamber 13 is the output end, and a planetary gear clutch 3 for connecting the gearbox 30 is arranged therein. A planetary gear set is arranged in the hybrid transmission case wet chamber 12. The planetary gear set includes: a sun gear train component 5, a planetary gear train component 7, and an external gear ring train component 8. Both the diesel engine clutch 2 and the planetary gear clutch 3 are connected to the planetary gear train component 7, and the external gear ring train component 8 is connected to the planetary gear clutch 3. A speed control motor gear shaft 511 for connecting the speed control motor 40 and a torque increasing motor gear shaft 811 for connecting the torque increasing motor are further arranged in the hybrid transmission case wet chamber 12. The external gear ring train component 8 is also in transmission connection with the torque increasing motor gear shaft 811, and the sun gear train component 5 is in transmission connection with the speed control motor gear shaft 511.

[0021] In this application, the hybrid box housing 1 is set as the dry chamber 11 of the diesel engine clutch, the wet chamber 12 of the hybrid box, and the dry chamber 13 of the planetary gear clutch, realizing a structure with dry and wet chambers separated. A diesel engine clutch 2 is arranged in the dry chamber 11 of the diesel engine clutch, a planetary gear clutch 3 is arranged in the dry chamber 13 of the planetary gear clutch, and a planetary gear set is arranged in the wet chamber 12 of the hybrid box to realize the connection of the diesel engine clutch 2, the planetary gear clutch 3, the speed regulation motor gear shaft 511, and the torque increasing motor gear shaft 811, thereby realizing the hybrid output of power; reducing the volume and weight of the hybrid box, and being able to match the installation space under the EMU car body.

[0022] Specifically, since the traction power and torque of the EMU are much larger than those of ordinary passenger cars, and restricted by the space under the EMU car body, the diesel engine clutch 2 and the planetary gear clutch 3 are selected as dry-type electromagnetic clutches, which can meet the requirements of the installation space under the EMU car body for volume and weight while realizing the traction power and torque. Due to the limitation of the external dimension of the dry-type electromagnetic clutch, in this application, the hybrid box housing 1 is set as three parts: the dry chamber 11 of the diesel engine clutch, the wet chamber 12 of the hybrid box, and the dry chamber 13 of the planetary gear clutch. A set of planetary gear sets is installed in the wet chamber 12 of the hybrid box, and the planetary gear sets are respectively connected to the speed regulation motor gear shaft 511 and the torque increasing motor gear shaft 811 through two sets of parallel shaft gear sets. The diesel engine clutch 2 is installed in the dry chamber 11 of the diesel engine clutch to realize the access of the power of the diesel engine 20, and the planetary gear clutch 3 is installed in the dry chamber 13 of the planetary gear clutch to realize the differential control of the planetary gear.

[0023] Specifically, the wet chamber 12 of the hybrid box includes a cylindrical section and a square section, which are in through connection. The cylindrical section, the dry chamber 11 of the diesel engine clutch, and the dry chamber 13 of the planetary gear clutch form a cylindrical structure with an equal outer diameter, and its outer diameter is the same as the connection flange sizes of the flywheel housing of the diesel engine 20 and the transmission 30.

[0024] Preferably, the sun gear system component 5 includes a sun gear 503 and a sun large gear 501; the internal teeth of the sun large gear 501 are in internal engagement with the crowned teeth of the sun gear 503, and the sun large gear 501 is in transmission connection with the speed regulation motor gear shaft 511; The planetary gear system 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 sleeved on the planetary carrier shaft 71, the planetary shaft 74 is fixedly arranged on the planetary carrier 72, and the planetary gear 75 is rotatably arranged on the planetary shaft 74 through a planetary gear support bearing 76 and meshes with the sun gear 503; The external gear ring system component 8 includes an external gear ring 803 and an external gear ring support assembly for supporting the external gear ring 803. The internal teeth of the external gear ring 803 mesh with the planetary gear 75, and the external teeth are in transmission connection with the torque increasing motor gear shaft 811.

[0025] 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 planet carrier connection side 22 drivingly connected to the planet 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 planet carrier connection side 22. When the first electromagnetic coil 23 is energized, the diesel engine connection side 21 and the first planet carrier connection side 22 are engaged, and the diesel engine 20 is connected to the system; when the first electromagnetic coil 23 is de-energized, the diesel engine connection side 21 and the first planet carrier connection side 22 are separated, and the diesel engine 20 is disconnected from the system.

[0026] Specifically, the diesel engine clutch 2 further includes: a diesel engine flywheel connection portion 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 engagement portion 222. The first planet carrier connection portion 221 is installed at the input end of the planet carrier shaft 71 (i.e., the end located inside the dry chamber 11 of the diesel engine clutch) in a form of surface connection 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 through a spline structure. The diesel engine connection side 21 and the first electromagnetic coil 23 are located on both sides of the first planet carrier engagement portion 222, and the first electromagnetic coil 23 is located on the side of the first planet carrier engagement 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. The diesel engine flywheel connection portion 24 is provided on the diesel engine connection side 21 so that the diesel engine connection side 21 is bolted to the flywheel of the diesel engine 20.

[0027] Preferably, a hybrid transmission input support and seal 4 is provided between the wet chamber 12 of the hybrid transmission and the dry chamber 11 of the diesel engine clutch; the hybrid transmission input support and seal 4 includes: an input large end cover 41, an input small end cover 42, an input oil seal 43, an input oil baffle 44, and a first planet carrier support bearing 45; the input large end cover 41 is fixedly provided in the hybrid transmission housing 1, and the input large end cover 41 supports the sun large gear 501; the first planet carrier support bearing 45 is provided between the input large end cover 41 and the planet carrier shaft 71; the input small end cover 42 is fixedly provided on the input large end cover 41, the input oil seal 43 is fixedly sleeved on the planet carrier shaft 71, and the input oil baffle 44 and the input oil seal 43 form a dynamic seal.

[0028] Specifically, the large end cover 41 at the input end includes a connection portion 411 of the large end cover at the input end, a sealing and mounting portion 412 of the large end cover at the input end, and a mounting portion 413 for the large gear support bearing. The connection portion 411 of the large end cover at the input end is fixedly connected to the fixed flange 121 at the input end of the wet chamber 12 of the hybrid box by screws. The first planet carrier support bearing 45 is installed between the sealing and mounting portion 412 of the large end cover at the input end and the planet carrier shaft 71 for supporting the rotation of the planet carrier shaft 71. A large gear support bearing 502 is provided between the mounting portion 413 for the large gear support bearing and the large sun gear 501 for rotational connection. The small end cover 42 at the input end is fixedly connected to the connection portion 411 of the large end cover at the input end, and an input end sealing ring 46 is provided between the small end cover 42 at the input end and the sealing and mounting portion 412 of the large end cover at the input end to form a static seal. The input end oil seal 43 and the input end oil baffle 44 are both located on the side of the first planet carrier support bearing 45 facing the small end cover 42 at the input end. The small end cover 42 at the input end presses the input end oil baffle 44 against the outer ring of the first planet carrier support bearing 45, and the input end oil baffle 44 and the input end oil seal 43 form a dynamic seal; and a labyrinth seal structure is formed between the input end oil seal 43 and the small end cover 42 at the input end.

[0029] Specifically, the large end cover 41 at the input end further includes a shielding portion 414 of the large end cover at the input end. The shielding portion 414 of the large end cover at the input end is located at the end of the sealing and mounting portion 412 of the large end cover at the input end away from the small end cover 42 at the input end. A gap is left between the shielding portion 414 of the large end cover at the input end and the outer periphery of the planet carrier shaft 71, and the end face of the first planet carrier support bearing 45 is shielded.

[0030] Preferably, the planetary gear clutch 3 includes: a second planet carrier connection side 31 fixedly connected to the planet carrier shaft 71, a ring gear connection side 32 fixedly connected to the ring gear support assembly, and a second electromagnetic coil 33 for controlling the engagement and separation of the second planet carrier connection side 31 and the ring gear connection side 32. The side of the ring gear connection side 32 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 planet carrier connection side 31 and the ring gear connection side 32 are engaged, and the differential planetary function of the planetary gear set is lost; when the second electromagnetic coil 33 is de-energized, the second planet carrier connection side 31 and the ring gear connection side 32 are separated, and the differential planetary function of the planetary gear set is restored.

[0031] Specifically, the planetary gear clutch 3 further includes: a transmission connection portion 34, an electromagnetic coil support bearing 35, and a second planet carrier support bearing 36. The outer ring connection side 32 includes an outer ring connection portion 321 and an outer ring engagement portion 322. The outer ring connection portion 321 is coaxially arranged with the planet carrier shaft 71 and is located at the output end of the planet carrier shaft 71 (i.e., the end located inside the dry chamber 13 of the planetary gear clutch). The second planet carrier connection side 31 and the second electromagnetic coil 33 are located on both sides of the outer ring engagement portion 322, and the second electromagnetic coil 33 is located on the side of the outer ring engagement portion 322 away from the planetary gear set. A second planet carrier support bearing 36 is provided between the second planet carrier connection side 31 and the outer ring connection portion 321 for rotational connection. An electromagnetic coil support 35 is provided between the second electromagnetic coil 33 and the outer ring connection portion 321 for rotational connection. A transmission connection portion 34 is provided at the center of the end of the outer ring connection portion 321 away from the planet carrier shaft 71 to realize the fixed connection between the outer ring connection portion 321 and the input end of the transmission 30.

[0032] Preferably, the planetary gear train component 7 further includes a planet carrier flange 73. The planet carrier flange 73 is fixedly sleeved 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.

[0033] Preferably, the outer ring support assembly includes: an outer ring end cover 804, an outer ring oil seal 805, an outer ring output small flange 806, and an outer ring output large flange 807; the outer ring 803 is fixedly connected to the outer ring connection side 32 through the outer ring end cover 804, the outer ring output small flange 806, and the outer ring output large flange 807; the outer ring oil seal 805 is provided between the outer ring end cover 804 and the planet carrier flange 73 to realize static sealing when the outer ring end cover 804 and the planet carrier flange 73 are relatively stationary and auxiliary dynamic sealing when the outer ring end cover 804 and the planet carrier flange 73 rotate relative to each other. A labyrinth seal structure is formed between the outer ring end cover 804 and the planet carrier 72 to realize dynamic sealing when the outer ring end cover 804 and the planet carrier 72 rotate relative to each other.

[0034] Preferably, a hybrid transmission wet chamber output end support and seal 9 is provided between the hybrid transmission wet chamber 12 and the planetary gear clutch dry chamber 13; the hybrid transmission wet chamber 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 94; the output end large end cover 91 is fixedly provided in the hybrid transmission housing 1, and the output end large end cover 91 supports the outer ring output small flange 806; the output end small end cover 92 is fixedly provided on the output end large end cover 91, the output end oil seal 93 is fixedly sleeved on the outer ring output small flange 806, and the output end oil baffle 94 forms a dynamic seal with the output end oil seal 93.

[0035] Specifically, the large end cover 91 of the output end includes a connection portion 911 of the large end cover of the output end and a sealed mounting portion 912 of the large end cover of the output end. The connection portion 911 of the large end cover of the output end is fixedly connected to the fixed flange 122 at the output end of the wet chamber 12 of the hybrid transmission box by screws. The outer ring support bearing 802 is installed between the sealed mounting portion 912 of the large end cover of the output end and the small output flange 806 of the outer ring for the rotation of the small output flange 806 of the outer ring. The small end cover 92 of the output end is fixedly connected to the connection portion 911 of the large end cover of the output end by screws, and an input end sealing ring 46 is arranged between the small end cover 92 of the output end and the sealed mounting portion 912 of the large end cover of the output end to form a static seal. The output end oil seal 93 and the output end oil baffle 94 are both located on the side of the outer ring support bearing 802 facing the small end cover 92 of the output end. The small end cover 92 of the output end presses the output end oil baffle 94 against the outer ring of the outer ring support bearing 802, and 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 small end cover 92 of the output end.

[0036] Specifically, the large end cover 91 of the output end further includes a shielding portion 913 of the large end cover of the output end. The shielding portion 913 of the large end cover of the output end is located at the end of the sealed mounting portion 912 of the large end cover of the output end away from the small end cover 92 of the output end. A gap is left between the shielding portion 913 of the large end cover of the output end and the outer periphery of the small output flange 806 of the outer ring, and the end face of the outer ring support bearing 802 is shielded.

[0037] Specifically, the planetary gear clutch 3 is installed in the dry chamber 13 of the planetary gear clutch. The planet carrier 72 and the outer ring 803 connected thereto are both located in the wet chamber 12 of the hybrid transmission box. The connection of the planetary gear clutch 3 to the planet carrier 72 and the outer ring 803 needs to enter the dry chamber 13 of the planetary gear clutch from the wet chamber 12 of the hybrid transmission box. Therefore, in terms of structure, both transmission and sealing need to be ensured. In this application, the planet carrier shaft 71 and the planet carrier flange 73 are provided to realize the connection between the planet carrier 72 and the connection side 31 of the second planet carrier, and the outer ring end cover 804, the small output flange 806 of the outer ring and the large output flange 807 of the outer ring are provided to realize the connection between the outer ring 803 and the connection side 32 of the outer ring, so as to bypass the support and sealing 9 at the output end of the hybrid transmission box, and at the same time ensure the sealing between the wet chamber 12 of the hybrid transmission box and the dry chamber 13 of the planetary gear clutch, the locking and differential of the planetary gear set.

[0038] Preferably, an intermediate support 61 is further arranged in the wet chamber 12 of the hybrid transmission box. The intermediate support 61 is located between the large sun gear 501 and the planet carrier 72; one side of the planet carrier 72 away from the dry chamber 13 of the planetary gear clutch is connected to the intermediate support 61 through a copper oil seal 62; an intermediate lubricating oil path 1007 is provided in the intermediate support 61, the copper oil seal 62, the planet carrier 72 and the planet shaft 74. The copper oil seal 62 ensures that lubricating oil enters from the oil passage in the stationary box body to lubricate the rotating planet gears 75, the planet gear support bearings 76, the sun gears 503 and the outer ring 803.

[0039] Specifically, the planet carrier 72 includes: a planet carrier fixing sleeve 721, a first support disk 722, a second support disk 723, and a side support 724. The planet carrier fixing sleeve 721 is fixedly sleeved on the planet carrier shaft 71 by interference fit. The first support disk 722 is arranged around the planet carrier fixing sleeve 721 and fixed to the outer periphery of the planet carrier fixing sleeve 721. The second support disk 723 is located on one side of the planet carrier fixing sleeve 721 and is arranged opposite to the first support disk 722. The side support 724 is fixedly arranged between the first support disk 722 and the second support disk 723 and is used for connecting and supporting the first support disk 722 and the second support disk 723. A plurality of planet gear relief openings 7241 are formed on the side support 724. Taking four planet gears 75 as an example, there are four planet gear relief openings 7241 for installing the planet gears 75. A blind hole is formed on the first support disk 722, and a mounting through hole coaxial with the blind hole is formed on the second support disk 723. The planet gear 75 extends in from the planet gear relief opening 7241. After the planet shaft 74 passes through the mounting through hole and then passes through the planet gear support bearing 76 in the middle of the planet gear 75, the end of the planet shaft 74 is fixedly arranged in the blind hole by interference fit, thereby realizing the installation of the planet gear 75. A sun gear relief hole coaxial with the planet carrier fixing sleeve 721 is formed on the second support disk 723, so that the sun gear 503 can enter from the sun gear relief hole and mesh with the planet gear 75. The planet carrier 72 is integrally formed, with a compact structural design, which is beneficial to reducing the volume and weight of the planetary gear set; and it has good structural stiffness, ensuring the stable operation of the planet gear 75. At the same time, the planet gear 75, the planet shaft 74, and the planet carrier 72 can be assembled into one body and then installed on the planet carrier shaft 71, making the assembly simpler, and it is easy to ensure the accuracy through processing, reducing the assembly and debugging difficulty.

[0040] Specifically, the intermediate support 61 includes: 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 installed on the box wall at the through - hole of the cylindrical section and the square section of the wet chamber 12 of the hybrid box by screws. A large gear support bearing 502 is arranged between the intermediate support mounting portion 612 and the sun large gear 501 to achieve relative rotation, and a large gear support bearing 502 is arranged between the large gear support bearing mounting portion 413 and the sun large gear 501 for rotational connection.

[0041] Specifically, on the side of the outer gear ring 803 away from the dry chamber 13 of the planetary gear clutch, an outer gear ring support bearing seat 801 is fixedly provided by screws, that is, on the side of the outer gear ring 803 away from the outer gear ring end cover 804, an outer gear ring support bearing seat 801 is fixedly provided by screws. An outer gear ring support bearing 802 is arranged between the outer gear ring support bearing seat 801 and the intermediate support mounting portion 612 to achieve rotational connection and support for the outer gear ring 803.

[0042] Specifically, the sun gear train component 5 further includes a large gear support bearing 502 and a semi-circular snap ring 504. The sun gear 503 includes a sun gear tooth part 5031, a sun gear connection part 5032, and a sun gear crowned tooth part 5033. After the sun gear tooth part 5031 enters from the sun gear relief hole, its teeth mesh with the planet gear 75, and the crowned teeth of the sun gear crowned tooth part 5033 mesh with the internal teeth of the sun large gear 501. An annular groove is provided on the sun gear connection part 5032, and two semi-circular snap rings 504 are snapped into the annular groove. The semi-circular snap rings 504 are fixedly connected to the sun large gear 501 by screws respectively, realizing the axial positioning of the sun large gear 501 on the sun gear 503. The sun gear 503 is sleeved on the planet carrier shaft 71 in a floating manner, and the sun gear 503 adopts a floating structure, which can eliminate assembly errors. The floating structure is a conventional technical means for the hybrid system and will not be elaborated here.

[0043] Specifically, the external teeth of the sun large gear 501 are in power transmission with the speed regulation motor gear shaft 511 through a transition shaft component. The transition shaft component includes: a speed regulation motor transition gear 505, a transition shaft bearing 506, a transition shaft sleeve 507, a transition shaft 508, a first transition shaft spacer 509, a transition shaft end cover 510, and a set screw 513. The transition shaft 508 is installed at the square section of the wet chamber 12 of the hybrid box through a through hole provided on the box wall on one side of the input end of the square section of the wet chamber 12 of the hybrid box. The transition shaft sleeve 507 is sleeved on the transition shaft 508 and is connected by a spline. The first transition shaft spacer 509 is sleeved on the transition shaft 508 and axially compresses the transition shaft sleeve 507. The first transition shaft spacer 509 and the transition shaft 508 are connected by a set screw 513 to prevent the first transition shaft spacer 509 from rotating. The transition shaft end cover 510 is installed at the through hole provided on the box wall on one side of the input end of the square section by screws. The transition shaft end cover 510 compresses the first transition shaft spacer 509 and the transition shaft 508 to perform axial positioning. The speed regulation motor transition gear 505 is rotatably arranged on the transition shaft sleeve 507 through a transition shaft bearing 506. The speed regulation motor transition gear 505 meshes with the external teeth of the sun large gear 501, and the speed regulation motor transition gear 505 meshes with the teeth of the speed regulation motor gear shaft 511.

[0044] Specifically, the power of the external teeth of the external gear ring 803 is transmitted to the torque increasing motor gear shaft 811 through a transition shaft component. The transition shaft component further 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 arranged on the transition shaft sleeve 507 through the transition shaft bearing 506, and 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 external teeth of the external gear ring 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 of fixing the shaft and rotating the gear to ensure the installation of the transition shaft component, simplify the structure of the hybrid box housing 1 of the box body, and make full use of the internal space of the speed regulation motor transition gear 505 and the torque increasing motor transition gear 808, reducing the weight and volume.

[0045] Specifically, the transmission ratio of the speed regulation motor transition gear 505 to the speed regulation motor gear shaft 511 is equal to the transmission ratio of the torque increasing motor transition gear 808 to the torque increasing motor gear shaft 811, ensuring that the speed regulation motor 40 and the torque increasing motor are fully powered during pure electric drive.

[0046] Specifically, the number of teeth of the speed regulation motor gear shaft 511 and the torque increasing motor gear shaft 811 is the same and both are right-handed. The number of teeth of the speed regulation motor transition gear 505 and the torque increasing motor transition gear 808 is the same and both are left-handed. The number of teeth of the sun large gear 501 and the external teeth of the external gear ring 803 is the same and both are right-handed. The internal teeth of the external gear ring 803 and the teeth of the planet gear 75 are left-handed, and the teeth of the sun gear 503 are right-handed.

[0047] Specifically, an installation hole is provided on one side of the box body wall at the output end of the square section of the wet chamber 12 of the hybrid box. Both the speed regulation motor gear shaft 511 and the torque increasing motor gear shaft 811 are installed at the square section of the wet chamber 12 of the hybrid box through the installation hole. At one end of the speed regulation motor gear shaft 511 and the torque increasing motor gear shaft 811 inserted into the square section of the wet chamber 12 of the hybrid box, a speed regulation motor gear shaft bearing 512 is installed, so as to be rotatably installed on one side of the box body wall at the input end of the square section of the wet chamber 12 of the hybrid box. At one end of the speed regulation motor gear shaft 511 and the torque increasing motor gear shaft 811 corresponding to the output end of the square section of the wet chamber 12 of the hybrid box, they are rotatably installed on the motor shaft bearing seat 813 through the torque increasing motor gear shaft bearing 812. The motor shaft bearing seat 813 is installed at the installation hole through screws, and the rotation is prevented by setting a set screw 513.

[0048] Specifically, the speed regulation motor gear shaft 511 and the torque increasing motor gear shaft 811 are arranged vertically, with the speed regulation motor gear shaft 511 on the upper part and the torque increasing motor gear shaft 811 on the lower part. Furthermore, the speed regulation motor 40 and the torque increasing motor are arranged vertically, making full use of the installation space under the EMU car body, reducing the volume and weight of the hybrid box housing 1.

[0049] Specifically, the carrier shaft 71 is supported on the large end cover 41 of the input end by the first carrier support bearing 45, and the carrier flange 73 is supported on the outer ring connection side 32 by the second carrier support bearing 36. The small flange 806 of the outer ring output is supported on the large end cover 91 of the output end by the outer ring support bearing 802, thereby realizing the stable support of the entire planetary gear train component 7. Both the carrier 72 and the carrier flange 73 are installed on the carrier shaft 71 by oil pressure taper fit, and the planetary shaft 74 is connected to the carrier 72 by liquid nitrogen interference fit, saving space to the maximum extent and making the structure more compact.

[0050] Specifically, the carrier flange 73 includes a carrier flange fixing portion 731 and a carrier flange connecting portion 732. The carrier flange fixing portion 731 is installed on the carrier shaft 71 by oil pressure taper fit, and the carrier flange connecting portion 732 is connected to the second carrier connection side 31 by screws. The first support disk 722 of the carrier 72 is located on the side of the planetary gear 75 facing the carrier flange connecting portion 732, and the carrier flange connecting portion 732 and the first support disk 722 form an annular groove-shaped relief installation space 78.

[0051] The outer ring end cover 804 includes: an outer ring end cover fixing portion 8041, an outer ring end cover connecting portion 8042, and an outer ring end cover sealing portion 8043. The outer ring end cover fixing portion 8041 is fixedly connected to the side of the outer ring 803 facing the dry chamber 13 of the planetary gear clutch by screws, and the outer ring end cover connecting portion 8042 is fixedly connected to the small flange 806 of the outer ring output by screws; the outer ring end cover sealing portion 8043 extends into the relief installation space 78, and an outer ring oil seal 805 is provided between the outer ring end cover sealing portion 8043 and the carrier flange fixing portion 731 for sealing, and a labyrinth seal structure is formed between the relative portions of the outer ring end cover sealing portion 8043 and the first support disk 722 of the carrier 72.

[0052] The small flange 806 of the outer ring output includes a first flange connecting portion 8061 and a second flange connecting portion 8062. The first flange connecting portion 8061 and the second flange connecting portion 8062 are in an "L" shape. The first flange connecting portion 8061 is arranged around the carrier flange connecting portion 732 and the relief installation space 78, and the outer ring end cover connecting portion 8042 is fixedly installed at the end of the first flange connecting portion 8061 by screws to make the structure more compact. The second flange connecting portion 8062 is located on the side of the small end cover 92 of the output end away from the outer ring support bearing 802, enhancing the sealing effect of the labyrinth seal structure formed between the output end oil seal 93 and the small end cover 92 of the output end and pressing the output end oil seal 93 against the inner ring of the outer ring support bearing 802.

[0053] 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.

[0054] Specifically, a hybrid box lubrication system 10 is also provided in the wet chamber 12 of the hybrid box. The hybrid box lubrication system 10 includes: a lubricating pump 1001, an oil suction pipeline 1002, and an intermediate planetary gear train lubrication pipeline 1005. An oil pipeline 1006 is provided on the box body of the square section of the wet chamber 12 of the hybrid box.

[0055] An input end lubricating oil pipeline 1004 is provided on the box body at the input end of the wet chamber 12 of the hybrid box, at the output end of the intermediate shaft 508, on the intermediate shaft sleeve 507, on the input end fixing flange 121, and in the input end large end cover 41; the input end lubricating oil pipeline 1004 is provided with an oil outlet for the governor motor gear shaft bearing, an oil outlet for the intermediate shaft bearing, an oil outlet for the large gear support bearing, an oil outlet for the sun gear drum tooth part, and an oil outlet for the first planetary carrier support bearing.

[0056] An output end lubricating oil pipeline 1003 is provided on the box body at the output end of the wet chamber 12 of the hybrid box, on the motor shaft bearing seat 813, at the input end of the intermediate shaft 508, on the intermediate shaft sleeve 507, on the output end fixing flange 122, and in the output end large end cover 91; the output end lubricating oil pipeline 1003 is provided with an oil outlet for the torque increasing motor gear shaft bearing, an oil outlet for the intermediate shaft bearing, and an oil outlet for the outer gear ring support bearing.

[0057] An intermediate lubricating oil pipeline 1007 is provided in the intermediate support 61, the copper oil seal 62, the second support disc 723, and the planetary shaft 74. The intermediate lubricating oil pipeline 1007 is provided with an oil outlet for the outer gear ring support bearing, an oil outlet for the large gear support bearing, and an oil outlet for the planetary gear support bearing.

[0058] The lubricating pump 1001 sends lubricating oil into the oil suction pipeline 1002. The oil suction pipeline 1002 is connected to the oil pipeline 1006 of the box body through a connection joint. The oil pipeline 1006 of the box body is connected to the input end lubricating oil pipeline 1004 and the output end lubricating oil pipeline 1003; the oil suction pipeline 1002 sends lubricating oil into the input end lubricating oil pipeline 1004 and the output end lubricating oil pipeline 1003 through the oil pipeline 1006 of the box body and then sprays out from each oil outlet for lubrication. One end of the intermediate planetary gear train lubrication pipeline 1005 is connected to the oil pipeline 1006 of the box body through a connection joint, and the other end is connected to the intermediate lubricating oil pipeline 1007 through a connection joint. The lubricating oil enters the intermediate lubricating oil pipeline 1007 through the intermediate planetary gear train lubrication pipeline 1005 and then sprays out from each oil outlet for lubrication.

[0059] The lubricating oil path 1004 at the input end lubricates the bearing 512 of the gear shaft of the speed-regulating motor, the bearing 506 of the intermediate shaft of the torque-increasing motor idler gear 808, the bearing 502 of the large gear support installed on the large end cover 41 at the input end, the crowned tooth part 5033 of the sun gear, and the first planet carrier support bearing 45; The lubricating oil path 1003 at the output end lubricates the bearing 812 of the gear shaft of the torque-increasing motor, the bearing 506 of the intermediate shaft of the speed-regulating motor idler gear 505, and the bearing 802 of the external gear ring support installed on the large end cover 91 at the output end; The intermediate lubricating oil path 1007 lubricates the bearing 802 of the external gear ring support installed on the bearing seat 801 of the external gear ring, the bearing 502 of the large gear support installed on the intermediate support 61, and the planet gear support bearing 76; The support bearing 25 on the diesel engine connection side, the support bearing 35 of the electromagnetic coil, and the second planet carrier support bearing 36 are all self-lubricating bearings; the speed-regulating motor idler gear 505 and the torque-increasing motor idler gear 808 both adopt splash lubrication.

[0060] Specifically, the intermediate lubricating oil path 1007 includes: an intermediate support section, an oil ring, and a planet shaft section. An intermediate support section is provided in the intermediate support 61, and a planet shaft section is provided in the planet shaft 74; an oil groove 7231 is provided in the second support disk 723, and a copper oil seal 62 is inserted into the oil groove 7231 to form an oil ring; the copper oil seal 62 is provided with a communication port to communicate the intermediate support section with the oil ring. The intermediate lubricating oil path 1007 introduces the lubricating oil in the intermediate planetary gear train lubricating oil path 1005 into the inner side of the second support disk 723 for lubricating the planet gear support bearing 76, the planet gear 75, the sun gear 503, and the external gear ring 803.

[0061] Specifically, the lubricating pump 1001 is installed in the wet chamber 12 of the hybrid transmission from the bottom opening of the wet chamber 12 of the hybrid transmission, and then the bottom opening of the wet chamber 12 of the hybrid transmission is sealed with a sealing cover. The end of the torque-increasing motor idler gear 808 is coaxially fixed with a lubricating pump driving gear 810 by screws. The lubricating pump driving gear 810 rotates with the torque-increasing motor idler gear 808, and the lubricating pump driving gear 810 meshes with the lubricating pump driven gear on the lubricating pump 1001. Since regardless of the driving form, the torque-increasing motor idler gear 808 is always connected to the input and output of the hybrid transmission, the lubricating system 10 of the hybrid transmission can always work to supply oil when the hybrid transmission is running.

[0062] Embodiment 2: A hybrid drive system includes the EMU hybrid box in Embodiment 1, and also includes a diesel engine 20, a power battery 60, a speed regulation motor 40, a torque increasing motor, a gearbox 30 and an electronic control system 70; the diesel engine 20 includes a diesel engine and an auxiliary system, and the diesel engine adopts a 6-cylinder horizontal diesel engine; the power battery 60 includes a battery and a thermal management system. The gearbox 30 adopts a 6-speed automatic gearbox. Both the speed regulation motor 40 and the torque increasing motor adopt high-speed permanent magnet motors. The diesel engine 20, the speed regulation motor 40, the torque increasing motor, the gearbox 30 and the electronic control system 70 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 an axle gearbox; the power battery 60 is integrated with 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 in a hybrid manner through the hybrid power pack. The EMU hybrid box includes two sets of parallel shaft gear sets, one set of differential planetary gear sets and two sets of dry electromagnetic clutches; the speed regulation motor 40 and the torque increasing motor adopt high-speed permanent magnet motors, which are small in size and light in weight, and are decelerated and connected to the drive system by two sets of parallel shaft gear sets; the differential planetary gear set can adjust the speed of the speed regulation motor 40 to the diesel engine 20, and realize the speed decoupling between the diesel engine 20 and the gearbox 30. This application can not only realize the separate pure diesel and pure electric drives of the diesel engine 20, the speed regulation motor 40 and the torque increasing motor, but also meet the hybrid drive requirements; and has the functions of adjusting the speed of the diesel engine 20 through the speed regulation motor 40 and increasing the torque of the diesel engine 20 through the torque increasing motor, so that the diesel engine 20 always works in the high-efficiency, low-consumption, low-emission and high-torque area, achieving the goals of energy conservation, emission reduction and environmental protection. At the same time, it is ensured that the volume and weight are minimized to the greatest extent.

[0063] The assembly sequence of the device in this application: a Install and fix the lubricating pump driving gear 810 on the torque increasing motor intermediate gear 808; b Install the intermediate shaft bearings 506 in the speed regulation motor intermediate gear 505 and the torque increasing motor intermediate gear 808 respectively; c Install the two sets of assemblies assembled in step b and the intermediate shaft spacer two 809 on the intermediate shaft sleeve 507; d Place the output end of the hybrid box housing 1 downward and the input end upward, vertically; connect the assembly assembled in step c to the intermediate shaft 508 through a spline, and install it on the hybrid box housing 1 through the intermediate shaft spacer one 509 and the intermediate shaft end cover 510. Adjust the axial installation dimension by the intermediate shaft spacer one 509, the intermediate shaft spacer two 809 and the intermediate shaft end cover 510, and prevent the intermediate shaft 508, the intermediate shaft sleeve 507 and the intermediate shaft spacer one 509 from rotating by the set screw 513; e Place the output end of the hybrid box housing 1 upward and the input end downward, vertically; install the speed regulation motor gear shaft bearing 512 and the torque increasing motor gear shaft bearing 812 on the speed regulation motor gear shaft 511; 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 transmission housing 1. Prevent the motor shaft bearing seat 813 from rotating by using a set screw 513. Install the output end small end cover 92, the output end oil seal 93, the output end oil baffle 94, the ring gear support bearing 802, and the output end large end cover 91 on the ring gear output small flange 806 in sequence. Install the assembly assembled in step g on the output fixed flange 122 at the output end of the wet chamber 12 of the hybrid transmission housing 1 through the output end large end cover 91. Install the ring gear output large flange 807 on the ring gear output small flange 806. Install the planet carrier flange 73 on the planet carrier shaft 71 by hydraulic pressure. Connect the assembly assembled in step j to the second planet carrier connection side 31 of the planetary gear clutch 3 through the planet carrier flange 73. Install the assembly assembled in step k on the ring gear output large flange 807. Connect the ring gear output large flange 807 to the ring gear connection side 32 of the planetary gear clutch 3 to complete the installation of the planetary gear clutch 3. Install the ring gear end cover 804 on the ring gear 803, and install the ring gear oil seal 805 on the ring gear end cover 804. Place the hybrid transmission housing 1 vertically with the output end down and the input end up. Install the assembly assembled in step m on the ring gear output small flange 806 together through the ring gear end cover 804, and at the same time complete the installation between the ring gear oil seal 805 and the planet carrier flange 73 by using tools. Install the planet gear support bearing 76 on the planet gear 75, and install the planet shaft 74, the planet gear 75, and the planet gear support bearing 76 on the planet carrier 72 by liquid nitrogen. Install the assembly assembled in step o on the planet carrier shaft 71 through the planet carrier 72 by hydraulic pressure. Install the ring gear support bearing seat 801 on the ring gear 803. Install the ring gear support bearing 802 and the copper oil seal 62 on the intermediate support 61. Install the assembly assembled in step r on the hybrid transmission housing 1 through the intermediate support 61, so that the ring gear support bearing 802 is assembled onto the ring gear support bearing seat 801 and the copper oil seal 62 is assembled onto the second support disk 723. Install the large gear support bearing 502 on the large sun gear 501, and connect the sun gear 503 to the large sun gear 501 by using a semi-circular snap ring 504. 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; Install the large end cover 41 of the input end on the fixed flange 121 at the input end of the wet chamber 12 of the hybrid box, so that the large end cover 41 of the input end is connected to the large gear support bearing 502; 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 small end cover 42 of the input end between the planet carrier shaft 71 and the large end cover 41 of the input end in sequence; Install and fix the diesel engine clutch 2 on the spline at the end of the planet carrier shaft 71; After assembling the lubricating pump 1001 and the lubricating pump driven gear, install them into the hybrid box body 1 from the bottom of the hybrid box body 1; Connect the lubricating pump 1001, the oil suction pipeline 1002, the intermediate planetary gear train lubricating pipeline 1005, the box body oil pipeline 1006 and the intermediate lubricating oil pipeline 1007.

[0064] The working principle of the device of this application: 1. When the diesel engine clutch 2 and the planetary gear clutch 3 are engaged simultaneously, the diesel engine 20 is connected to the system, and the planetary gear set is locked. Under the condition that the speed regulating motor 40 and the torque increasing motor controller are powered off, pure diesel drive can be realized; 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, and the planetary gear set is locked. Under the condition that the speed regulating motor 40 and the torque increasing motor are put into operation separately or simultaneously, P2 type hybrid electric drive can be realized; 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, and the planetary gear set is locked. Under the condition that the speed regulating motor 40 and the torque increasing motor are put into operation separately or simultaneously, pure electric drive can be realized; 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, and the planetary gear set is differential. Under the condition that the speed regulating motor 40 and the torque increasing motor are put into operation separately or simultaneously, hybrid electric drive can be realized. When the speed regulating motor 40 is put into operation, the speed of the diesel engine 20 can be adjusted to realize the speed decoupling of the diesel engine 20 of the EMU and the gearbox 30, so that the diesel engine 20 can always work in the high-efficiency, low-consumption, low-emission and high-torque speed region, achieving the goals of energy conservation, emission reduction and environmental protection. When the torque increasing motor is put into operation, the output torque can be increased to improve the acceleration performance of the EMU and achieve the goal of optimizing the travel performance of the EMU; 5. When the diesel engine clutch 2 is engaged, the diesel engine 20 is connected to the system. In the two hybrid drive working conditions of 2 and 4 of the drive system, the speed regulating motor 40 and the torque increasing motor can generate electricity separately or simultaneously under the regulation of the controller to realize on-vehicle charging of the system; 6. When the diesel engine clutch 2 is disengaged and the planetary gear clutch 3 is engaged, the diesel engine 20 is disconnected from the system, the planetary gear set is locked, and in the pure electric drive mode of 3 for the drive system, the speed regulating motor 40 and the torque increasing motor can generate electricity separately or simultaneously under the regulation of the controller, realizing braking and charging for the EMU.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and 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 multiple unit trains, characterized in that, It includes a hybrid transmission case body (1), and the hybrid transmission case body (1) includes a diesel engine clutch dry chamber (11), a hybrid transmission wet chamber (12), and a planetary gear clutch dry chamber (13) arranged in sequence; The diesel engine clutch dry chamber (11) is the input end, and a diesel engine clutch (2) for connecting a diesel engine (20) is arranged therein; The planetary gear clutch dry chamber (13) is the output end, and a planetary gear clutch (3) for controlling planetary gear differential and connecting to a transmission (30) is arranged therein; A planetary gear set is arranged in the hybrid transmission wet chamber (12), and the planetary gear set includes: a sun gear system component (5), a planetary gear system component (7), and an outer gear ring system component (8); the diesel engine clutch (2) and the planetary gear clutch (3) are both connected to the planetary gear system component (7), and the outer gear ring system component (8) is connected to the planetary gear clutch (3); A speed regulation motor gear shaft (511) for connecting a speed regulation motor (40) and a torque increasing motor gear shaft (811) for connecting a torque increasing motor are further arranged in the hybrid transmission 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 regulation motor gear shaft (511).

2. The EMU hybrid box according to claim 1, wherein The sun gear system component (5) includes a sun gear (503) and a large sun gear (501); the inner teeth of the large sun gear (501) are in meshing connection with the drum teeth of the sun gear (503), and the large sun gear (501) is in transmission connection with the speed regulation motor gear shaft (511); The planetary gear system 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 sleeved on the planetary carrier shaft (71), the planetary shaft (74) is fixedly arranged on the planetary carrier (72), and the planetary gear (75) is rotatably arranged on the planetary shaft (74) and meshes with the sun gear (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), and the inner teeth of the outer gear ring (803) mesh with the planetary gear (75), and the outer teeth are in transmission connection with the torque increasing motor gear shaft (811).

3. The EMU hybrid box according to claim 2, wherein, 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) in transmission connection with the 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).

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

5. The EMU hybrid box according to claim 4, characterized in that, The planetary gear clutch (3) includes: a second planet carrier connection side (31) fixedly connected to the planet carrier shaft (71), an outer gear ring connection side (32) fixedly connected to the outer gear ring support assembly, and a second electromagnetic coil (33) for controlling the engagement and separation of the second planet carrier connection side (31) and the outer gear ring connection side (32), and the side of the outer gear ring connection side (32) away from the planetary gear set is fixedly connected to the input end of the gearbox (30).

6. The EMU hybrid box according to claim 5, characterized in that, The planetary gear train component (7) further includes a planet carrier flange (73), the planet carrier flange (73) is fixedly sleeved on the planet carrier shaft (71) and is located on the side of the planet carrier (72) facing the planetary gear clutch (3), and the planet carrier flange (73) is fixedly connected to the second planet carrier connection side (31).

7. The EMU hybrid box according to claim 6, wherein, The outer gear ring support assembly includes: 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) through 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).

8. The EMU hybrid box according to claim 7, characterized in that A hybrid box output end support and seal (9) is provided between the wet chamber (12) of the hybrid box and the dry chamber (13) of the planetary gear clutch; 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 (94); the output end large end cover (91) is fixedly arranged in the hybrid box housing (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), and the output end oil baffle (94) and the output end oil seal (93) form a dynamic seal.

9. The hybrid box of the multiple unit train according to claim 8, characterized in that, An intermediate support (61) is further provided in the wet chamber (12) of the hybrid gearbox. The intermediate support (61) is located between the sun gear (501) and the planet carrier (72). One side of the planet carrier (72) away from the dry chamber (13) of the planetary gear clutch is connected to the intermediate support (61) through a copper oil seal (62). The intermediate support (61), the copper oil seal (62), the planet carrier (72) and the planet shaft (74) are provided with an intermediate lubricating oil path (1007).

10. A hybrid powertrain system, characterized in that, The EMU hybrid gearbox according to any one of claims 1-9 further includes 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 through a mounting frame and a suspension system and suspended under the EMU, 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. The power battery (60) stores energy and drives the EMU purely electrically or in a hybrid manner through the hybrid power pack.

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