Power coupling device, power system and engineering vehicle

Abstract

The utility model relates to the technical field of engineering vehicles, and discloses a power coupling device, a power system and an engineering vehicle, and the power coupling device comprises a shell, an input shaft, a planetary gear train, a clutch, a first transmission hub and an output shaft. The input shaft is rotationally connected with the shell and used for being connected with a first power machine. An outer hub of the clutch is in transmission connection with the input shaft on the side of the sun gear close to the clutch, and an inner hub is connected with the planet carrier. The first transmission hub is rotationally connected with the shell, the first transmission hub is connected with the sun gear and used for being connected with a second power machine, and the output shaft is in transmission connection with the gear ring. The first power machine is an engine, and the second power machine is a motor. Due to the fact that the input shaft sequentially penetrates through the penetrating holes in the first transmission hub and the sun gear, the clutch can be arranged on the side, away from the first transmission hub, of the sun gear while being connected to the input shaft. At the moment, the motor and the engine serving as the first power machine are located on the same side, the structure is more compact, and the overall occupied space is small.

Description

Technical Field

[0001] This application relates to the field of engineering vehicle technology, specifically to a power coupling device, a power system, and an engineering vehicle. Background Technology

[0002] Engineering vehicles are specialized vehicles used for various engineering construction and operational tasks, such as excavators, bulldozers, road rollers, and loaders. Because engineering vehicles are primarily used for various tasks, they require faster and stronger torque output during operation. For this reason, an increasing number of engineering vehicles use electric motors for power output. However, electric motors are limited by their electrical storage capacity, making it difficult to continuously output power. To compensate for this problem, a hybrid power output system that couples the engine and electric motor is often used.

[0003] To improve coupling smoothness, in existing engineering vehicle power systems, the engine and motor are coupled via a planetary gear system consisting of a sun gear, planetary gears, a ring gear, and a planet carrier. Typically, the motor is connected to the sun gear, the engine is connected to the planet carrier via a clutch, and the ring gear is connected to the output shaft used for power delivery. Furthermore, for fuel economy, the engine is often connected to the planet carrier via a clutch as well.

[0004] However, since both the clutch and the motor need to be connected to the planetary gear system, the motor needs to be located on the side of the planetary gear system away from the clutch. Since the engine is connected to the planetary carrier through the clutch, the engine needs to be located on the side of the clutch away from the planetary gear system. This results in the engine and motor, which are both power units, being set up separately on both sides of the planetary gear system, making the structure relatively dispersed and occupying a large space overall.

[0005] Therefore, how to solve or improve the problem that the engine and motor need to be separately set on both sides of the planetary gear system when coupled through the planetary gear system has become an important technical problem to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, this application provides a power coupling device, a power system, and an engineering vehicle to solve or improve the problem that the engine and the motor need to be separately installed on both sides of the planetary gear system when they are coupled through the planetary gear system.

[0007] In a first aspect, this application provides a power coupling device, comprising:

[0008] case;

[0009] An input shaft, rotatably connected to the housing, is used to connect to the first power unit;

[0010] A planetary gear train includes a sun gear, planetary gears, a planet carrier, and a ring gear. The sun gear meshes with the planetary gears, which are rotatably connected to the planet carrier. The ring gear meshes with the planetary gears. A through hole is provided at the center of the sun gear's shaft, through which the input shaft passes.

[0011] The clutch, which is sequentially arranged with the planetary gear train along the extension direction of the input shaft, includes an outer hub and an inner hub. The outer hub and the inner hub can engage or disengage from each other. The outer hub is connected to the portion of the input shaft located on the sun gear near the clutch. The inner hub is connected to the planet carrier.

[0012] The first transmission hub is rotatably connected to the housing and is located on the side of the sun gear away from the clutch. The first transmission hub is connected to the sun gear and is used to connect to the second power unit.

[0013] The output shaft is connected to the gear ring drive.

[0014] Optionally, a second transmission hub is provided on the output shaft, and an extension is provided on the gear ring. The extension is connected to the second transmission hub so that the gear ring is connected to the output shaft in a transmission manner. A receiving space for accommodating the clutch is formed between the planetary gear train, the extension, the second transmission hub, and the input shaft.

[0015] Optionally, the clutch further includes:

[0016] An outer friction plate is disposed in the inner circumference of the outer hub and is slidably connected to the inner circumferential surface of the outer hub, so that the outer friction plate can slide along the axial direction of the outer hub and rotate together with the outer hub;

[0017] An internal friction plate is sleeved around the outer periphery of the inner hub and slidably connected to the outer circumferential surface of the inner hub, so that the internal friction plate can slide along the axial direction of the inner hub and rotate together with the inner hub.

[0018] The driving component has an outer hub coaxially sleeved around the outer hub. Along the axial direction, the outer friction plate and the inner friction plate partially overlap. The driving component is adapted to drive the outer friction plate or the inner friction plate to slide so that the outer friction plate and the inner friction plate approach and abut against each other.

[0019] Optionally, it further includes a third transmission hub, which is connected to the input shaft and located on the side of the inner hub opposite to the planetary gear train. The third transmission hub is connected to the outer hub, and the inner hub is rotatably connected to the input shaft.

[0020] The driving component includes:

[0021] The piston has a piston groove on the side of the third transmission hub near the inner hub. The piston is slidably connected in the piston groove and can slide along the axial direction of the input shaft. The sliding direction of the piston at least partially coincides with the outer friction plate and the inner friction plate, so that when the piston slides near the outer friction plate and the inner friction plate, it can push the outer friction plate or the inner friction plate to slide.

[0022] An elastic element is provided, through which the piston is connected to the input shaft. Under the elastic force of the elastic element, the piston tends to slide away from the outer friction plate or the inner friction plate.

[0023] Optionally, a first oil port is provided on the inner wall of the piston groove. The first oil port is located on the side of the piston away from the outer friction plate. A first oil passage and a first channel are provided inside the input shaft. One end of the first channel is connected to the first oil passage, and the other end is connected to the first oil port.

[0024] Optionally, the output shaft is provided with a rotating hole, and the input shaft portion extends into the rotating hole and is rotatably configured.

[0025] Optionally, a first annular groove is provided on the outer wall of the portion of the input shaft that extends into the rotating hole;

[0026] A second annular groove is provided on the outer wall of the output shaft, and a second channel is opened inside the output shaft. One end of the second channel is connected to the first annular groove, and the other end is connected to the second annular groove.

[0027] The portion of the input shaft that extends into the rotating hole has a third channel inside. One end of the third channel is connected to the first annular groove, and the other end is connected to the first oil passage.

[0028] Optionally, an oil cavity is formed between the portion of the input shaft that extends into the rotating hole and the bottom of the rotating hole. A second oil port is provided on the inner wall of the oil cavity, and a fourth channel is provided on the output shaft, the fourth channel communicating with the second oil port.

[0029] The input shaft is provided with a lubricating oil passage and a fifth channel. The lubricating oil passage is connected to the oil cavity, and the fifth channel is connected to the lubricating oil passage. A sixth channel is provided inside the first transmission hub.

[0030] The planet carrier has a seventh channel, which connects to the connection between the planetary gear and the planet carrier;

[0031] One end of the sixth channel is connected to the fifth channel, and the other end is connected to the seventh channel.

[0032] Secondly, this application also provides a power system, comprising:

[0033] Any of the above-mentioned power coupling devices;

[0034] A first power unit is connected to the input shaft and can drive the input shaft to rotate;

[0035] The second power unit is connected to the first transmission hub and can drive the first transmission hub to rotate.

[0036] Thirdly, this application also provides an engineering vehicle, including any of the power coupling devices or power systems described above.

[0037] This application provides a power coupling device, comprising: a housing, an input shaft, a planetary gear train, a clutch, a first transmission hub, and an output shaft. The input shaft is rotatably connected to the housing and is used to connect to a first power unit. A through hole is provided at the center of the sun gear of the planetary gear train, through which the input shaft passes. The clutch and the planetary gear train are arranged sequentially along the extension direction of the input shaft. The outer hub and inner hub of the clutch can engage or disengage. The outer hub is drive-connected to the portion of the input shaft located on the sun gear near the clutch, and the inner hub is connected to the planet carrier. The first transmission hub is rotatably connected to the housing and is located on the side of the sun gear away from the clutch. The first transmission hub is connected to the sun gear and is used to connect to a second power unit. The output shaft is drive-connected to a ring gear.

[0038] The first power unit drives the input shaft to rotate, which in turn drives the outer hub of the clutch to rotate. With the outer and inner hubs of the clutch engaged, the outer hub drives the inner hub to rotate, which in turn drives the planetary carrier to rotate. Meanwhile, the second power unit drives the first transmission hub to rotate, which in turn drives the sun gear to rotate. Thus, the power from the first and second power units couples at the planetary gear train. The coupling of the sun gear rotation and the planetary carrier rotation drives the ring gear to rotate, which in turn drives the output shaft to rotate and output power.

[0039] When the first power unit is an engine and the second power unit is an electric motor, the input shaft passes sequentially through holes in the first transmission hub and the sun gear, allowing the clutch to be positioned on the side of the sun gear away from the first transmission hub while connected to the input shaft. The electric motor, as the second power unit, can be positioned on the side of the sun gear away from the clutch and connected to the first transmission hub, allowing the motor to drive the sun gear to rotate via the first transmission hub. In this configuration, the electric motor and the engine (as the first power unit) are located on the same side, resulting in a more compact structure and a smaller overall footprint. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this application, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of a power coupling device according to an embodiment of this application;

[0042] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0043] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0044] Figure 4 This is a schematic diagram of the structure of a power system according to an embodiment of this application.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1. First power unit; 2. Input shaft; 21. First oil passage; 22. First channel; 23. First annular groove; 24. Third channel; 25. Lubricating oil passage; 26. Fifth channel; 27. Eighth channel; 28. Ninth channel; 3. Planetary gear train; 31. Sun gear; 32. Planetary gear; 33. Planet carrier; 331. Seventh channel; 34. Ring gear; 341. Extension; 4. Clutch; 41. Outer hub; 42. Inner hub; 43. Outer friction plate; 44. Internal friction plate 45. Drive component; 451. Piston; 452. Elastic component; 5. First transmission hub; 51. Sixth channel; 6. Output shaft; 61. Second annular groove; 62. Second channel; 63. Oil chamber; 631. Second oil port; 64. Fourth channel; 7. Second transmission hub; 71. Oil passage hole; 8. Third transmission hub; 81. Piston groove; 811. First oil port; 9. Second power unit; 10. Sealing ring; 11. First bearing; 12. Second bearing; 13. Thrust bearing. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] The following is combined Figures 1 to 2This describes an embodiment of the present application.

[0049] According to embodiments of this application, in one aspect, a power coupling device is provided, such as... Figure 1 As shown, it includes: housing, input shaft 2, planetary gear train 3, clutch 4, first transmission hub 5, and output shaft 6.

[0050] The input shaft 2 is rotatably connected to the housing and is used to connect the first power unit 1. When the input shaft 2 is connected to the first power unit 1, the first power unit 1 can drive the input shaft 2 to rotate.

[0051] The planetary gear train 3 includes a sun gear 31, planetary gears 32, a planet carrier 33, and a ring gear 34. The sun gear 31 meshes with the planetary gear 32, which is rotatably connected to the planet carrier 33. The ring gear 34 meshes with the planetary gear 32. A through hole is formed at the center of the sun gear 31. The input shaft 2 passes through the through hole, with its two ends located on opposite sides of the sun gear 31. The sun gear 31, planetary gears 32, planet carrier 33, and ring gear 34 are all coaxially arranged with the input shaft 2.

[0052] Along the extension direction of the input shaft 2, the clutch 4 and the planetary gear train 3 are arranged sequentially. The clutch 4 includes an outer hub 41 and an inner hub 42. The inner hub 42 is sleeved around the input shaft 2, and the outer hub 41 is sleeved around the inner hub 42. Both the outer hub 41 and the inner hub 42 are coaxially arranged with the input shaft 2. The outer hub 41 and the inner hub 42 of the clutch 4 can engage or disengage from each other.

[0053] The outer hub 41 is connected to the portion of the input shaft 2 located on the sun gear 31 near the clutch 4, so that when the input shaft 2 rotates, it drives the outer hub 41 to rotate around the axis of the input shaft 2. The inner hub 42 is connected to the planet carrier 33, so that when the inner hub 42 rotates, it drives the planet carrier 33 to rotate around the axis of the input shaft 2.

[0054] When the outer hub 41 and the inner hub 42 are engaged, the rotation of the input shaft 2 drives the outer hub 41 to rotate, which in turn drives the inner hub 42 to rotate. The inner hub 42 then drives the planetary carrier 33 to rotate around the axis of the input shaft 2. When the outer hub 41 and the inner hub 42 are disengaged, the rotation of the input shaft 2 drives the outer hub 41 to rotate, but the outer hub 41 cannot drive the inner hub 42 to rotate, thus preventing the planetary carrier 33 from rotating around the axis of the input shaft 2.

[0055] The first transmission hub 5 is cylindrical and sleeved around the input shaft 2, rotatably connected to the housing. The first transmission hub 5 is coaxial with the input shaft 2, allowing it to rotate around the axis of the input shaft 2. One end of the first transmission hub 5 is connected to the side of the sun gear 31 away from the clutch 4, and the other end is used to connect to the second power unit 9. After connecting the second power unit 9 to the first transmission hub 5, the second power unit 9 can drive the first transmission hub 5 to rotate, thereby driving the sun gear 31 to rotate.

[0056] The output shaft 6 is connected to the gear ring 34, so that when the gear ring 34 rotates, it can drive the output shaft 6 to rotate and output power.

[0057] Thus, the first power unit 1 drives the input shaft 2 to rotate, and the input shaft 2 drives the outer hub 41 of the clutch 4 to rotate. When the outer hub 41 and the inner hub 42 of the clutch 4 are engaged, the outer hub 41 of the clutch 4 drives the inner hub 42 to rotate, and the inner hub 42 of the clutch 4 drives the planetary carrier 33 to rotate. Meanwhile, the second power unit 9 drives the first transmission hub 5 to rotate, and the first transmission hub 5 drives the sun gear 31 to rotate.

[0058] Thus, the power from the first power unit 1 and the power from the second power unit 9 are coupled at the planetary gear train 3. The rotation of the sun gear 31 and the rotation of the planet carrier 33, after coupling, drive the ring gear 34 to rotate, which in turn drives the output shaft 6 to rotate and output power.

[0059] like Figure 4 As shown, the first power unit 1 is configured as an engine, and the second power unit 9 is configured as an electric motor. Since the input shaft 2 passes sequentially through the holes in the first transmission hub 5 and the sun gear 31, the clutch 4, while connected to the input shaft 2, can be positioned on the side of the sun gear 31 facing away from the first transmission hub 5. The electric motor, serving as the second power unit 9, can be positioned on the side of the sun gear 31 facing away from the clutch 4 and connected to the first transmission hub 5, allowing the motor to drive the sun gear 31 to rotate via the first transmission hub 5. In this configuration, the electric motor and the engine (serving as the first power unit 1) are located on the same side, resulting in a more compact structure and a smaller overall footprint.

[0060] During power coupling, the outer hub 41 and inner hub 42 of clutch 4 are first disengaged, and then the engine is started, allowing it to operate at optimal power. Then, the outer hub 41 and inner hub 42 of clutch 4 are engaged, enabling the engine to drive the planetary carrier 33 to rotate via clutch 4. This engages with the sun gear 31 driven by the electric motor, driving the ring gear 34 to rotate, which in turn drives the output shaft 6 to output power. This ensures the engine maintains optimal power output at all times, resulting in better fuel economy.

[0061] As an optional embodiment, such as Figure 1As shown, a second transmission hub 7 is provided on the output shaft 6, so that the second transmission hub 7 rotates together with the output shaft 6. An extension 341 is provided at one end of the gear ring 34, and the extension 341 extends away from the gear ring 34. The end of the extension 341 opposite to the gear ring 34 is connected to the second transmission hub 7, so that when the gear ring 34 rotates, power can be transmitted sequentially through the extension 341 and the second transmission hub 7 to drive the output shaft 6 to rotate.

[0062] With this configuration, the planetary gear train 3, the extension 341, the second transmission hub 7, and the input shaft 2 enclose a receiving space. After the clutch 4 is placed in the receiving space, the planetary gear train 3 and the clutch 4 are arranged together, making the overall structure more compact.

[0063] In an optional embodiment, the clutch 4 is a friction plate clutch 4, which includes an outer hub 41 and an inner hub 42, as well as an outer friction plate 43, an inner friction plate 44, and a driving member 45. The outer hub 41 is sleeved around the inner hub 42 and is coaxial with the inner hub 42.

[0064] The outer friction plate 43 is disposed within the inner circumference of the outer hub 41. A first spline groove is formed axially on the inner circumferential surface of the outer hub 41, and a first spline is provided on the outer side of the outer friction plate 43. The spline is slidably disposed in the first spline groove. Thus, the outer friction plate 43 is slidably connected to the outer hub 41, can slide along the axial direction of the outer hub 41, and can rotate synchronously with the outer hub 41.

[0065] The inner friction plate 44 is sleeved on the periphery of the inner hub 42. A second spline groove is formed along the axial direction on the outer circumferential surface of the inner hub 42. A second spline is provided on the inner side of the second inner friction plate 44, and the second spline is slidably disposed in the second spline groove. Thus, the inner friction plate 44 is slidably connected to the inner hub 42, can slide along the axial direction of the inner hub 42, and can rotate synchronously with the inner hub 42.

[0066] Since the outer hub 41 is coaxially sleeved around the inner hub 42, the outer friction plate 43 and the inner friction plate 44 partially overlap in the axial direction. The driving member 45 drives the outer friction plate 43 or the inner friction plate 44 to slide along its own axial direction, so that the outer friction plate 43 and the inner friction plate 44 approach each other and abut against each other. When the outer friction plate 43 and the inner friction plate 44 abut against each other, a transmission connection is formed between the outer friction plate 43 and the inner friction plate 44, and they rotate synchronously. When the outer friction plate 43 and the inner friction plate 44 separate, the outer hub 41 and the inner hub 42 separate.

[0067] Specifically, when it is necessary to engage the outer hub 41 and inner hub 42 of the clutch 4, the outer friction plate 43 or the inner friction plate 44 of the drive component 45 is slid to bring the outer friction plate 43 and the inner friction plate 44 closer together and abut against each other. At this time, when the outer hub 41 rotates, it drives the outer friction plate 43 to rotate, the outer friction plate 43 drives the inner friction plate 44 to rotate, and the inner friction plate 44 drives the inner hub 42 to rotate, thereby realizing the engagement of the outer hub 41 and the inner hub 42.

[0068] When it is necessary to separate the outer hub 41 and inner hub 42 of the clutch 4, the driving force of the drive component 45 is canceled, thereby canceling the clamping force between the outer friction plate 43 and the inner friction plate 44. At this time, when the outer hub 41 rotates, it drives the outer friction plate 43 to rotate, but there is no clamping force between the outer friction plate 43 and the inner friction plate 44, so they are separated and cannot be transmitted to the inner friction plate 44, thus realizing the separation of the outer hub 41 and the inner hub 42. The operation is convenient and reliable.

[0069] In some embodiments, such as Figure 1 and Figure 2 As shown, the driving component 45 includes a piston 451 and an elastic component 452. The power coupling device also includes a third transmission hub 8, which is connected to the input shaft 2, so that the input shaft 2 rotates and drives the third transmission hub 8 to rotate together. The third transmission hub 8 can be connected to the input shaft 2 as a whole.

[0070] The third transmission hub 8 is located on the side of the inner hub 42 away from the planetary gear train 3, and connects the outer hub 41 to the third transmission hub 8. Thus, the outer hub 41 is connected to the input shaft 2 through the third transmission hub 8. When the input shaft 2 rotates, it can drive the outer hub 41 to rotate through the third transmission hub 8.

[0071] A piston groove 81 is provided on the side of the third transmission hub 8 near the inner hub 42, and a piston 451 is slidably connected in the piston groove 81. The piston groove 81 is opened along the axial direction of the input shaft 2, so that the piston 451 can slide along the axial direction of the input shaft 2 when sliding in the piston groove 81. When the piston 451 slides along the piston groove 81, the piston 451 is at least partially overlapped with the outer friction plate 43 or the inner friction plate 44 in the sliding direction of the piston 451.

[0072] In this way, when the piston 451 slides close to the outer friction plate 43 or the inner friction plate 44, it can push the outer friction plate 43 or the inner friction plate 44 to slide along its own axis, thereby making the outer friction plate 43 and the inner friction plate 44 press together.

[0073] Meanwhile, piston 451 is connected to input shaft 2 via elastic element 452. Elastic element 452 can be a spring, and under the elastic force of elastic element 452, piston 451 tends to slide away from outer friction plate 43 or inner friction plate 44.

[0074] Thus, when it is necessary to engage the outer hub 41 and inner hub 42 of the clutch 4, the drive piston 451 slides close to the outer friction plate 43 or the inner friction plate 44, causing the outer friction plates 43 to approach and press against each other. At this time, when the outer hub 41 rotates, it drives the outer friction plate 43 to rotate, which in turn drives the inner friction plate 44 to rotate, and the inner friction plate 44 drives the inner hub 42 to rotate, thereby achieving engagement between the outer hub 41 and the inner hub 42. At this time, the sliding of the piston 451 overcomes the elastic force of the elastic element 452, causing the elastic element 452 to undergo elastic deformation.

[0075] When it is necessary to separate the outer hub 41 and inner hub 42 of the clutch 4, the driving force on the piston 451 is canceled, the elastic element 452 rebounds, and under the elastic force of the elastic element 452, the piston 451 is pushed away from the outer friction plate 43 or the inner friction plate 44 to slide, thereby canceling the clamping force between the outer friction plate 43 and the inner friction plate 44. At this time, when the outer hub 41 rotates, it drives the outer friction plate 43 to rotate, but there is no clamping force between the outer friction plate 43 and the inner friction plate 44 and they are separated, so it is impossible to transmit power to the inner friction plate 44, thus realizing the separation of the outer hub 41 and the inner hub 42. The operation is convenient and reliable.

[0076] Multiple outer friction plates 43 and inner friction plates 44 can be provided, and the outer friction plates 43 and inner friction plates 44 are arranged alternately. When the outer friction plate 43 is closest to the piston 451, the piston 451 pushes the outer friction plate 43 when it slides; when the inner friction plate 44 is closest to the piston 451, the piston 451 pushes the inner friction plate 44 when it slides.

[0077] In optional embodiments, such as Figure 1 and Figure 2 As shown, a first oil port 811 is provided on the inner wall of the piston groove 81. The first oil port 811 is located on the side of the piston 451 away from the outer friction plate 43. In this way, when oil enters the piston groove 81 from the first oil port 811, it pushes the piston 451 to slide closer to the outer friction plate 43.

[0078] A first oil passage 21 and a first channel 22 are provided inside the input shaft 2. One end of the first channel 22 is connected to the first oil passage 21, and the other end of the first channel 22 is connected to the first oil port 811, so that the first oil port 811 is connected to the first oil passage 21 through the first channel 22.

[0079] When oil is introduced into the first oil passage 21, it flows through the first channel 22 to the first oil port 811, then enters the piston groove 81 and pushes the piston 451 closer to the outer friction plate 43. After oil supply to the first oil passage 21 stops, the piston 451 is no longer pushed by the oil. Under the rebound action of the elastic element 452, the elastic element 452 pushes the piston 451 closer to the first oil port 811. The oil on the side of the piston 451 away from the outer friction plate 43 returns to the first oil passage 21 through the first channel 22 and is discharged.

[0080] In a further embodiment, a rotating hole is provided on the end face of the output shaft 6, and the end portion of the input shaft 2 facing away from the first power unit 1 extends into the rotating hole, so that the input shaft 2 is rotatably connected in the rotating hole.

[0081] With this configuration, since the output shaft 6 can be partially fitted onto the input shaft 2, the distance between the second transmission hub 7 and the planetary gear train 3 is shortened, thereby shortening the length of the extension 341 and making the overall structure more compact.

[0082] The distance between the second transmission hub 7 and the planetary gear train 3 should ensure that the clutch 4 can be arranged.

[0083] The second drive hub 7 can be connected to the third drive hub 8 via the thrust bearing 13.

[0084] Furthermore, a first annular groove 23 is provided on the outer wall of the input shaft 2. After the input shaft 2 extends into the rotating hole, the first annular groove 23 is located inside the rotating hole.

[0085] A second annular groove 61 is provided on the outer wall of the output shaft 6, and a second channel 62 is provided inside the output shaft 6, such that one end of the second channel 62 penetrates the wall of the rotating hole and communicates with the first annular groove 23, and the other end of the second channel 62 communicates with the second annular groove 61. A third channel 24 is provided inside the input shaft 2, and after the input shaft 2 partially extends into the rotating hole, the third channel 24 is located inside the rotating hole. One end of the third channel 24 communicates with the first annular groove 23, and the other end of the third channel 24 communicates with the first oil passage 21.

[0086] In this way, when the oil is introduced into the second annular groove 61, it can flow through the second channel 62 to the first annular groove 23, and then through the third channel 24 to the first oil passage 21. This allows oil to be introduced into the first oil passage 21 when the input shaft 2 and the output shaft 6 rotate relative to each other.

[0087] After the output shaft 6 is rotatably connected to the mounting hole on the housing, the second annular groove 61 is connected to the oil inlet hole on the housing, so that oil can be introduced into the second annular groove 61 through the oil inlet hole.

[0088] A sealing ring 10 should be installed between the outer wall of the input shaft 2 and the inner wall of the output shaft 6. Sealing rings 10 should also be installed on both sides of the first annular groove 23.

[0089] In optional embodiments, such as Figure 1 and Figure 3 As shown, an oil cavity 63 is formed between the portion of the input shaft 2 that extends into the rotating hole and the bottom of the rotating hole. A second oil port 631 is provided on the inner wall of the oil cavity 63, and a fourth channel 64 is provided on the output shaft 6, such that one end of the fourth channel 64 is connected to the second oil port 631.

[0090] A lubricating oil passage 25 and a fifth channel 26 are provided on the input shaft 2. The lubricating oil passage 25 extends out of the end face of the input shaft 2 and communicates with the oil cavity 63. The end of the fifth oil passage opposite to the second oil port 631 is connected to the lubricating oil passage 25. Thus, lubricating oil can be introduced into the fourth channel 64, and the lubricating oil flows through the second oil port 631 into the oil cavity 63 and then into the lubricating oil passage 25.

[0091] A sixth channel 51 is provided on the first transmission hub 5, and a seventh channel 331 is provided in the planetary carrier 33, such that one end of the sixth channel 51 is connected to the fifth channel 26, and the other end of the sixth channel 51 is connected to the seventh channel 331. The air channel is connected to the connection between the planetary gear 32 and the planetary carrier 33.

[0092] In this way, the lubricating oil in the lubrication channel 25 can enter the seventh channel 331 through the fifth channel 26 and the sixth channel 51 in sequence, and then flow to the connection between the planetary gear 32 and the planet carrier 33, thereby lubricating the entire planetary gear train 3.

[0093] An eighth channel 27 is provided on the input shaft 2, with one end of the eighth channel 27 communicating with the lubricating oil passage 25 and the other end communicating with the receiving space. Oil passage holes are provided through both the outer hub 41 and the inner hub 42.

[0094] In this way, the lubricating oil in the lubrication passage 25 can enter the receiving space through the eighth channel 27, and then enter the space between the outer hub 41 and the inner hub 42 through the oil passage on the inner hub 42, so as to lubricate the outer friction plate 43 and the inner friction plate 44, forming a wet clutch 4, reducing wear and increasing service life.

[0095] The lubricating oil that enters the accommodating space can also flow through the first bearing 11, which is rotatably connected between the inner hub 42 and the input shaft 2, for lubrication. After flowing through the first bearing 11, it can also lubricate the planetary gear train 3.

[0096] An oil passage hole 71 is provided on the second transmission hub 7. The lubricating oil that enters between the outer hub 41 and the inner hub 42 flows out from the oil passage hole on the outer hub 41 into the receiving space, and then flows out of the receiving space through the oil passage hole 71. At this time, the second bearing 12, which is rotatably connected between the output shaft 6 and the housing, can be lubricated.

[0097] A ninth channel 28 is provided on the input shaft 2, such that one end of the ninth channel 28 is connected to the lubricating oil passage 25, and the other end is connected to the space between the third transmission hub 8 and the second transmission hub 7.

[0098] In this way, the lubricating oil in the lubrication channel 25 can enter the space between the third transmission hub 8 and the second transmission hub 7 through the ninth channel 28, thereby lubricating the thrust bearing 13 connected between the third transmission hub 8 and the second transmission hub 7, and also lubricating the space between the outer wall of the input shaft 2 and the inner wall of the rotating hole.

[0099] For the connection between the fifth channel 26 and the sixth channel 51, a portion of the housing is located between the input shaft 2 and the first transmission hub 5, and a tenth channel is provided. The input shaft 2 and the first transmission hub 5 are rotatably connected to this portion of the housing. Both the input shaft 2 and the first transmission hub 5 have annular oil grooves on their circumferential surfaces close to each other. The fifth channel 26 communicates with the annular oil groove on the input shaft 2, and the sixth channel 51 communicates with the annular oil groove on the first transmission hub 5 near the input shaft 2. The tenth channel communicates with both the input shaft 2 and the annular oil groove on the first transmission hub 5 near the input shaft 2, thus allowing the oil in the fifth channel 26 to flow into the annular oil groove on the input shaft 2 and then into the tenth channel on the housing. Similarly, the oil in the tenth channel flows into the annular oil groove on the first transmission hub 5 near the input shaft 2 and then into the sixth channel 51, achieving the connection between the fifth channel 26 and the sixth channel 51.

[0100] For the connection between the sixth channel 51 and the seventh channel 331, a portion of the housing is located between the first transmission hub 5 and the planetary carrier 33, and an eleventh channel is provided. The first transmission hub 5 and the planetary carrier 33 are rotatably connected to this portion of the housing. Annular oil grooves are provided on the adjacent circumferential surfaces of the first transmission hub 5 and the planetary carrier 33. The sixth channel 51 communicates with the annular oil groove on the first transmission hub 5 near the planetary carrier 33, and the seventh channel 331 communicates with the annular oil groove on the planetary carrier 33. The eleventh channel communicates with the annular oil grooves on the input shaft 2 and the first transmission hub 5 near the planetary carrier 33, respectively. Thus, the oil in the sixth channel 51 can flow to the annular oil groove on the first transmission hub 5 near the planetary carrier 33 and then to the eleventh channel on the housing. The oil in the eleventh channel can flow to the annular oil groove on the planetary carrier 33 and then to the seventh channel 331, achieving the connection between the sixth channel 51 and the seventh channel 331.

[0101] According to embodiments of this application, another aspect provides a power system, such as... Figure 4 As shown, it includes any of the above-mentioned power coupling devices, as well as the first power unit 1 and the second power unit 9.

[0102] The first power unit 1 is connected to the input shaft 2 and can drive the input shaft 2 to rotate, while the second power unit 9 is connected to the first transmission hub 5 and can drive the first transmission hub 5 to rotate.

[0103] The technical effects of this power system are the same as those of the power coupling device, so they will not be described in detail here.

[0104] The power system can also be connected in series with a third power unit to achieve stronger power output.

[0105] According to an embodiment of this application, in another aspect, an engineering vehicle is also provided, including any of the above-mentioned power coupling devices or power systems. The technical effects brought by this engineering vehicle are the same as those of the power coupling devices or power systems, and therefore will not be described in detail.

[0106] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A power coupling device, characterized in that, include: case; The input shaft (2) is rotatably connected to the housing and is used to connect the first power unit (1); The planetary gear train (3) includes a sun gear (31), a planetary gear (32), a planet carrier (33), and a ring gear (34). The sun gear (31) meshes with the planetary gear (32), the planetary gear (32) is rotatably connected to the planet carrier (33), and the ring gear (34) meshes with the planetary gear (32). A through hole is provided at the center of the shaft of the sun gear (31), and the input shaft (2) passes through the through hole. The clutch (4), which is arranged sequentially with the planetary gear train (3) along the extension direction of the input shaft (2), includes an outer hub (41) and an inner hub (42). The outer hub (41) and the inner hub (42) can engage or disengage from each other. The outer hub (41) is connected to the portion of the input shaft (2) located on the side of the sun gear (31) near the clutch (4). The inner hub (42) is connected to the planet carrier (33). The first transmission hub (5) is rotatably connected to the housing and is located on the side of the sun gear (31) away from the clutch (4). The first transmission hub (5) is connected to the sun gear (31) and is used to connect the second power unit (9). The output shaft (6) is connected to the gear ring (34) for transmission.

2. The power coupling device according to claim 1, characterized in that, The output shaft (6) is provided with a second transmission hub (7), and the gear ring (34) is provided with an extension (341). The extension (341) is connected to the second transmission hub (7) so that the gear ring (34) is connected to the output shaft (6) for transmission. A receiving space for accommodating the clutch (4) is formed between the planetary gear train (3), the extension (341), the second transmission hub (7) and the input shaft (2).

3. The power coupling device according to claim 1, characterized in that, The clutch (4) also includes: An outer friction plate (43) is disposed in the inner circumference of the outer hub (41) and is slidably connected to the inner circumferential surface of the outer hub (41) so that the outer friction plate (43) can slide along the axial direction of the outer hub (41) and can rotate together with the outer hub (41); An inner friction plate (44) is sleeved around the outer periphery of the inner hub (42) and slidably connected to the outer circumferential surface of the inner hub (42), so that the inner friction plate (44) can slide along the axial direction of the inner hub (42) and rotate together with the inner hub (42). The driving member (45) is coaxially sleeved around the outer hub (41) and the outer friction plate (43) and the inner friction plate (44) partially overlap in the axial direction. The driving member (45) is adapted to drive the outer friction plate (43) or the inner friction plate (44) to slide so that the outer friction plate (43) and the inner friction plate (44) come closer and abut against each other.

4. The power coupling device according to claim 3, characterized in that, It also includes a third transmission hub (8), which is connected to the input shaft (2) and located on the side of the inner hub (42) away from the planetary gear train (3). The third transmission hub (8) is connected to the outer hub (41), and the inner hub (42) is rotatably connected to the input shaft (2). The drive unit (45) includes: The piston (451) has a piston groove (81) on the side of the third transmission hub (8) near the inner hub (42). The piston (451) is slidably connected in the piston groove (81) and can slide along the axial direction of the input shaft (2). The piston (451) at least partially overlaps with the outer friction plate (43) and the inner friction plate (44) in the sliding direction, so that when the piston (451) slides near the outer friction plate (43) and the inner friction plate (44), it can push the outer friction plate (43) or the inner friction plate (44) to slide. The piston (451) is connected to the input shaft (2) via the elastic element (452). Under the elastic force of the elastic element (452), the piston (451) tends to slide away from the outer friction plate (43) or the inner friction plate (44).

5. The power coupling device according to claim 4, characterized in that, The piston groove (81) has a first oil port (811) on its inner wall. The first oil port (811) is located on the side of the piston (451) away from the outer friction plate (43). The input shaft (2) has a first oil passage (21) and a first channel (22). One end of the first channel (22) is connected to the first oil passage (21), and the other end is connected to the first oil port (811).

6. The power coupling device according to claim 5, characterized in that, The output shaft (6) is provided with a rotating hole, and the input shaft (2) is partially inserted into the rotating hole and can be rotatably configured.

7. The power coupling device according to claim 6, characterized in that, The outer wall of the portion of the input shaft (2) that extends into the rotating hole is provided with a first annular groove (23); The output shaft (6) has a second annular groove (61) on its outer wall and a second channel (62) inside the output shaft (6). One end of the second channel (62) is connected to the first annular groove (23) and the other end is connected to the second annular groove (61). The input shaft (2) has a third channel (24) inside the part that extends into the rotating hole. One end of the third channel (24) is connected to the first annular groove (23), and the other end is connected to the first oil passage (21).

8. The power coupling device according to claim 6, characterized in that, The portion of the input shaft (2) that extends into the rotating hole forms an oil cavity (63) between the bottom of the rotating hole and the oil cavity (63). A second oil port (631) is provided on the inner wall of the oil cavity (63). A fourth channel (64) is provided on the output shaft (6). The fourth channel (64) is connected to the second oil port (631). The input shaft (2) is provided with a lubricating oil passage (25) and a fifth channel (26). The lubricating oil passage (25) is connected to the oil cavity (63), and the fifth channel (26) is connected to the lubricating oil passage (25). A sixth channel (51) is provided in the first transmission hub (5). The planet carrier (33) has a seventh channel (331) inside, which connects to the connection between the planetary gear (32) and the planet carrier (33); One end of the sixth channel (51) is connected to the fifth channel (26), and the other end is connected to the seventh channel (331).

9. A power system, characterized in that, include: The power coupling device according to any one of claims 1-8; The first power unit (1) is connected to the input shaft (2) and can drive the input shaft (2) to rotate; The second power unit (9) is connected to the first transmission hub (5) and can drive the first transmission hub (5) to rotate.

10. An engineering vehicle, characterized in that, include: The power coupling device according to any one of claims 1-8 or the power system shown in claim 9.

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