Hybrid powertrain and apparatus

Abstract

The application provides a kind of hybrid power assembly and equipment, belongs to equipment technical field.The hybrid power assembly includes engine, first motor and second motor, sun gear, planet carrier, ring gear, first clutch, second clutch and reversing assembly.The first motor is connected with the sun gear, and the second motor is connected with the ring gear.The first clutch is connected with the engine and the planet carrier respectively, and the second clutch is connected with the first clutch in parallel through the reversing assembly, and the second clutch is connected with the engine and the planet carrier respectively through the reversing assembly.The hybrid power assembly provided by the application can realize the dynamic adjustment of engine power output direction by the cooperation of the switching of the closed state of the reversing assembly, the first clutch and the second clutch, so that the equipment can utilize the composite power output of the engine and the second motor under the reverse working condition, thereby facilitating the reduction of the power demand of the second motor and the reduction of the power consumption.

Description

Technical Field

[0001] This application relates to the field of equipment technology, and more particularly to a hybrid powertrain and equipment. Background Technology

[0002] Loaders, concrete pump trucks, and other similar equipment typically operate in complex environments such as construction sites, mines, and road construction sites. With the rapid development of new energy technologies, the powertrain of these machines needs to balance energy efficiency with adaptability to complex operating conditions.

[0003] In related technologies, the powertrain includes an engine, a generator, a drive motor, and a planetary gear set. The planetary gear set includes a planet carrier, a sun gear, and a ring gear. The engine is connected to the planet carrier, the generator is connected to the sun gear, and the drive motor is connected to the ring gear to achieve power output. During forward operation, the engine and drive motor work together, achieving power coupling through power splitting via the planetary gears.

[0004] However, when the powertrain is in reverse, it can only output reverse power through the drive motor, which increases the power demand of the drive motor and consumes a lot of electricity. Utility Model Content

[0005] This application provides a hybrid powertrain and device to address the shortcomings of related technologies.

[0006] On one hand, this application provides a hybrid powertrain, comprising:

[0007] The powertrain components include an engine, a first motor, and a second motor;

[0008] The planetary gear set includes a sun gear, a planet carrier, and a ring gear; the first motor is connected to the sun gear, and the second motor is connected to the ring gear.

[0009] The reversing mechanism includes a first clutch, a second clutch, and a reversing assembly. The first clutch is connected to the engine and the planetary carrier, respectively. The second clutch is connected in parallel with the first clutch via the reversing assembly and is also connected to the engine and the planetary carrier via the reversing assembly. The first clutch is configured to engage when the second clutch is disengaged to transmit the engine's power to the planetary carrier, causing the planetary carrier to rotate in a first rotation direction. The second clutch is configured to engage when the first clutch is disengaged to transmit the engine's power to the planetary carrier via the reversing assembly, causing the planetary carrier to rotate in a second rotation direction opposite to the first rotation direction.

[0010] In one possible implementation, the hybrid powertrain provided in this application includes a commutation assembly comprising a first gear pair; the first gear pair includes two meshing first gears, one of which is connected to the output shaft of the engine, and the other is connected to a second clutch.

[0011] In one possible implementation, the hybrid powertrain provided in this application further includes a second gear pair in the commutation assembly; the second gear pair includes three second gears meshing in sequence, one of the two second gears located on the outer edge being connected to the planet carrier and the other being connected to the second clutch.

[0012] In one possible implementation, the hybrid powertrain provided in this application further includes a transmission component, wherein both the first clutch and the second clutch are electrically connected to the transmission component, and the transmission component is used to adjust the engagement state of the first clutch and the second clutch.

[0013] In one possible implementation, the hybrid powertrain provided in this application further includes a brake. The hybrid powertrain includes a pure electric mode and a hybrid mode. In the pure electric mode, the brake fixes the planetary carrier, and at least one of the first motor and the second motor drives the gear ring. In the hybrid mode, the brake releases the planetary carrier, and the engine, the first motor, and the second motor jointly drive the gear ring.

[0014] In one possible implementation, the hybrid powertrain provided in this application further includes a brake disposed between the planetary carrier and the ring gear; or,

[0015] The brake is located between the first motor and the gear ring.

[0016] In one possible implementation, the hybrid powertrain provided in this application further includes a reverse mode in which the brake releases the planetary carrier, the first clutch disengages and the second clutch engages to transmit the power of the engine to the planetary carrier, causing the planetary carrier to rotate in a second rotational direction, and the first motor drives the ring gear to rotate in the second rotational direction.

[0017] In one possible implementation, the hybrid powertrain provided in this application further includes two transmission components, wherein a first motor is rotatably connected to a sun gear via one of the two transmission components, and a second motor is rotatably connected to a ring gear via the other of the two transmission components.

[0018] In one possible implementation, the hybrid powertrain provided in this application includes a transmission component comprising a drive shaft and two transmission gears, which are respectively disposed at both ends of the drive shaft. One of the two transmission gears is connected to a corresponding first motor or second motor, and the other meshes with a gear ring on a corresponding sun gear or gear ring.

[0019] On the other hand, this application provides a device including a device body and any of the hybrid powertrains described above disposed on the device body.

[0020] The hybrid powertrain and equipment provided in this application include a power assembly, a planetary gear set, and a commutation assembly. The power assembly includes an engine, a first motor, and a second motor. The planetary gear set includes a sun gear, a planet carrier, and a ring gear. The commutation structure includes a first clutch, a second clutch, and a commutation assembly. The first motor is connected to the sun gear, and the second motor is connected to the ring gear. The first clutch is connected to both the engine and the planet carrier. The second clutch is connected in parallel with the first clutch via the commutation assembly and is also connected to both the engine and the planet carrier via the commutation assembly. The first clutch is configured to engage when the second clutch is disengaged to transmit power from the engine to the planet carrier, causing the planet carrier to rotate in a first rotation direction. The second clutch is configured to engage when the first clutch is disengaged to transmit power from the engine to the planet carrier via the commutation assembly, causing the planet carrier to rotate in a second rotation direction opposite to the first rotation direction.

[0021] In this way, by coordinating the switching of the reversing component with the closing states of the first and second clutches, the direction of engine power output can be dynamically adjusted, allowing the engine to participate in power output in reversing conditions. This enables the equipment to utilize the combined power output of the engine and the second motor simultaneously, thereby reducing the power demand of the second motor and reducing electricity consumption. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0023] Figure 1 Schematic diagram of the hybrid powertrain provided in this application Figure 1 ;

[0024] Figure 2 Schematic diagram of the hybrid powertrain provided in this application Figure 2 ;

[0025] Figure 3 Schematic diagram of the hybrid powertrain provided in this application Figure 3 .

[0026] Explanation of reference numerals in the attached figures:

[0027] 100 - Power assembly; 110 - Engine; 120 - First motor; 130 - Second motor;

[0028] 200 - Planetary gear set; 210 - Sun gear; 220 - Planet carrier; 230 - Gear ring; 231 - Gear ring;

[0029] 300 - Reversing mechanism; 310 - First clutch; 320 - Second clutch; 330 - Reversing assembly; 331 - First gear pair; 3311 - First gear; 332 - Second gear pair; 3321 - Second gear;

[0030] 400 - Transmission component; 500 - Brake; 600 - Housing;

[0031] 700 - Transmission assembly; 710 - Drive shaft; 720 - Transmission gear. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0036] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0037] As stated in the background section, the powertrain in related technologies includes an engine, a generator, a drive motor, and a planetary gear set. The planetary gear set includes a planet carrier, a sun gear, and a ring gear. The engine is connected to the planet carrier, the generator is connected to the sun gear, and the drive motor is connected to the ring gear to achieve power output. During forward operation, the engine and drive motor work together, achieving power coupling through power splitting via the planetary gears.

[0038] However, when the powertrain is in reverse, it can only output reverse power through the drive motor, which increases the power demand of the drive motor and consumes a lot of electricity.

[0039] In view of this, embodiments of this application provide a hybrid powertrain and device. The hybrid powertrain comprises a power assembly, a planetary gear set, and a commutation assembly. The power assembly includes an engine, a first motor, and a second motor. The planetary gear set includes a sun gear, a planet carrier, and a ring gear. The commutation mechanism includes a first clutch, a second clutch, and a commutation assembly. The first motor is connected to the sun gear, and the second motor is connected to the ring gear. The first clutch is connected to both the engine and the planet carrier. The second clutch is connected in parallel with the first clutch via the commutation assembly and is also connected to both the engine and the planet carrier via the commutation assembly. The first clutch is configured to engage when the second clutch is disengaged to transmit power from the engine to the planet carrier, causing the planet carrier to rotate in a first rotation direction. The second clutch is configured to engage when the first clutch is disengaged to transmit power from the engine to the planet carrier via the commutation assembly, causing the planet carrier to rotate in a second rotation direction opposite to the first rotation direction.

[0040] In this way, by coordinating the switching of the reversing component with the closing states of the first and second clutches, the direction of engine power output can be dynamically adjusted, allowing the engine to participate in power output in reversing conditions. This enables the equipment to utilize the combined power output of the engine and the second motor simultaneously, thereby reducing the power demand of the second motor and reducing electricity consumption.

[0041] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0042] See Figure 1The hybrid powertrain provided in this application includes a power assembly 100, a planetary gear set 200, and a commutation mechanism 300. The power assembly 100 includes an engine 110, a first motor 120, and a second motor 130. The planetary gear set 200 includes a sun gear 210, a planet carrier 220, and a ring gear 230. The first motor 120 is connected to the sun gear 210, and the second motor 130 is connected to the ring gear 230. The commutation mechanism 300 includes a first clutch 310, a second clutch 320, and a commutation assembly 330. The first clutch 310 is connected to the engine 110 and the planet carrier 220, respectively. The second clutch 320 is connected in parallel with the first clutch 310 through the commutation assembly 330, and is also connected to the engine 110 and the planet carrier 220 through the commutation assembly 330.

[0043] The first clutch 310 is configured to engage when the second clutch 320 is disengaged, so as to transmit the power of the engine 110 to the planetary carrier 220, causing the planetary carrier 220 to rotate in a first rotation direction; the second clutch 320 is configured to engage when the first clutch 310 is disengaged, so as to transmit the power of the engine 110 to the planetary carrier 220 through the reversing assembly 330, causing the planetary carrier 220 to rotate in a second rotation direction opposite to the first rotation direction.

[0044] The planetary gear set 200 adopts a standard planetary gear mechanism design, including three basic components: sun gear 210, planet carrier 220, and ring gear 230. These three components maintain independent rotational degrees of freedom and realize power transmission and distribution through gear meshing.

[0045] The output shaft of the first motor 120 is connected to the sun gear 210, allowing the first motor 120 to be directly driven or driven by the sun gear 210. The output shaft of the second motor 130 is connected to the ring gear 230, responsible for outputting power to the drive system of the equipment. The reversing mechanism 300 consists of a first clutch 310, a second clutch 320, and a reversing assembly 330. The input end of the first clutch 310 is connected to the output shaft of the engine 110, and the output end of the first clutch 310 is connected to the planetary carrier 220, forming a direct power transmission path.

[0046] The second clutch 320 is connected in parallel with the first clutch 310. Its input end is connected to the engine 110 through the reversing assembly 330, and its output end is also connected to the planetary carrier 220 through the reversing assembly 330, forming an indirect power transmission path.

[0047] For example, the hybrid powertrain can be integrated into a housing 600, which is made of high-strength die-cast aluminum alloy and has three chambers: front, middle, and rear. The front chamber is used to install the engine 110 connecting flange, the first clutch 310, the second clutch 320, and the commutation assembly 330; the middle chamber forms the mounting space for the planetary gear set 200, and its inner wall is provided with precision bearing seats to support the front and rear bearings of the planetary carrier 220; the rear chamber is mainly used for the connection structure of the second motor 130 and the arrangement of the output shaft.

[0048] Furthermore, the housing 600 is internally designed with multiple reinforcing ribs and mounting bosses to provide rigid support for each rotating component. The output shaft of the first motor 120 passes through a sealed bearing at the front of the housing 600 into the central chamber and connects to the sun gear 210. The output shaft of the second motor 130 extends from the rear of the housing 600 and connects to the outer edge of the gear ring 230 via a spline structure. The first clutch 310 is directly mounted on a fixed bracket in the front chamber of the housing 600, with its input hub connected to the output shaft of the engine 110 and its output hub connected to the front end of the planetary carrier 220.

[0049] The second clutch 320 is also installed in the front chamber of the housing 600, arranged side-by-side with the first clutch 310. The reversing assembly 330 is integrally integrated within the front chamber and may include a reversing wheel, an input gear, and an output gear (not shown). The reversing wheel is mounted in a bearing housing on the side wall of the front chamber of the housing 600 via a reversing shaft. The reversing shaft is supported at both ends by needle roller bearings to ensure rotational accuracy. The input gear is linked to the output shaft of the engine 110. The input end of the second clutch 320 is connected to the input gear, and the output end is connected to the reversing shaft. The output gear is linked to the planetary carrier 220, and the reversing wheel meshes with the output gear. Thus, when the second clutch 320 is closed to engage the input gear and the reversing wheel shaft, power is transmitted through this path, and the reversing wheel, acting as an intermediate transmission element, changes the direction of rotation.

[0050] In practical implementation, the hybrid powertrain has two main operating modes: forward and reverse. In the forward mode, the first clutch 310 engages while the second clutch 320 disengages. The power from the engine 110 is directly transmitted to the planetary carrier 220 via the first clutch 310, causing the planetary carrier 220 to rotate in the first rotation direction. At this time, the engine 110 and the second electric motor 130 work together, achieving efficient power coupling output through the power splitting characteristics of the planetary gear set 200.

[0051] In reverse operation, the first clutch 310 disengages while the second clutch 320 engages. Power from the engine 110 enters the reversing assembly 330 via the second clutch 320. After the reversing wheel of the reversing assembly 330 changes its rotation direction, the power is transmitted to the planetary carrier 220, causing it to rotate in a second rotation direction opposite to the first rotation direction. At this time, the engine 110 and the second motor 130 simultaneously provide opposite power to the ring gear 230, forming a compound power output.

[0052] It should be noted that the first motor 120 has flexible operating modes under different working conditions. In forward operation, the first motor 120 usually works as a generator, converting part of the power from the engine 110 into electrical energy; in reverse operation, the first motor 120 can selectively work as a motor or a generator according to system requirements, providing the system with additional control freedom.

[0053] The hybrid powertrain provided in this application embodiment can dynamically adjust the power output direction of the engine 110 by cooperating with the switching of the closed state of the commutation component 330 with the first clutch 310 and the second clutch 320. This allows the engine 110 to participate in power output in the reversing condition, so that the device can simultaneously utilize the combined power output of the engine 110 and the second motor 130, thereby helping to reduce the power demand of the second motor 130 and reduce power consumption.

[0054] The specific structure and connection method of the commutation component 330 according to the embodiments of this application will be described below.

[0055] Continue reading Figure 1 In some embodiments, the reversing assembly 330 includes a first gear pair 331; the first gear pair 331 includes two meshing first gears 3311, one of which is connected to the output shaft of the engine 110 and the other is connected to the second clutch 320.

[0056] Specifically, a first gear 3311 is fixedly connected to the output shaft of the engine 110. The connection method can be a conventional mechanical connection method such as spline fit, key connection or interference fit, to ensure that the first gear 3311 can be driven to rotate synchronously when the output shaft of the engine 110 rotates.

[0057] Another first gear 3311 is connected to the input end of the second clutch 320, allowing the power of the first gear 3311 to be directly transmitted to the second clutch 320. The engagement or disengagement of the second clutch 320 controls the on / off transmission of power. Through the two meshing first gears 3311, the power output from the engine 110 undergoes its first change in rotation direction during transmission to the second clutch 320, providing a basis for the subsequent reverse rotation of the planetary carrier 220.

[0058] Furthermore, to optimize the commutation effect and improve the stability of power transmission, the commutation assembly 330 also includes a second gear pair 332; the second gear pair 332 includes three sequentially meshing second gears 3321, one of the two second gears 3321 located on the outer edge is connected to the planet carrier 220, and the other is connected to the second clutch 320.

[0059] In this embodiment, the three second gears 3321 are arranged linearly, with the teeth of adjacent second gears 3321 meshing with each other to form a continuous power transmission chain. The two second gears 3321 located on the outer edge of the second gear pair 332 respectively undertake the functions of power input and output. One of them establishes a transmission connection with the planetary carrier 220, and the connection position can correspond to the power input shaft extending from the front end of the planetary carrier 220. Through spline connection or other means, it is ensured that the power can be effectively transmitted to the planetary carrier 220.

[0060] The other is fixedly connected to the output end of the second clutch 320, so that the power output by the second clutch 320 can be introduced into the second gear pair 332 through the second gear 3321. During the power transmission process, the three sequentially meshing second gears 3321 adjust the rotation direction of the power transmitted from the first gear pair 331 a second time through the reversing action of the intermediate gear, so that the direction of the power transmitted to the planetary carrier 220 is opposite to the direction of the power directly transmitted by the first clutch 310.

[0061] Overall, through the coordinated operation of the first gear pair 331 and the second gear pair 332, the reversing assembly 330 forms a stable and reliable reversing transmission path. When the second clutch 320 engages, the power from the engine 110 passes sequentially through the first gear pair 331, the second clutch 320, and the second gear pair 332. Under the reversing action of the two gear meshings, a precise change in the direction of rotation is achieved, ultimately driving the planetary carrier 220 to rotate along the second rotation direction, meeting the power requirements of the reversing operation.

[0062] In some examples, the hybrid powertrain also includes a transmission 400, to which both a first clutch 310 and a second clutch 320 are electrically connected, and the transmission 400 is used to adjust the engagement state of the first clutch 310 and the second clutch 320.

[0063] Among them, the transmission component 400, as the core control unit of the clutch, is electrically connected to both the first clutch 310 and the second clutch 320. It is used to precisely adjust the closing state of the first clutch 310 and the second clutch 320 according to the operating conditions of the hybrid powertrain, thereby realizing the switching of the power transmission path and the control of the power output direction.

[0064] In this embodiment, the transmission component 400 can be integrated inside the housing 600 of the hybrid powertrain. It is connected to the controller signal of the device through the control circuit and can receive the operating condition commands sent by the controller in real time, such as forward, reverse, and gear shifting operation signals. At the same time, it can collect the real-time working status feedback of the first clutch 310 and the second clutch 320 to form a closed-loop control logic to ensure the accuracy and timeliness of clutch status adjustment.

[0065] For example, the control logic of the transmission 400 follows the interlock principle, that is, the internal control program strictly limits the action sequence of the first clutch 310 and the second clutch 320 to ensure that only one clutch is in the closed state during forward and reverse driving conditions, so as to avoid the two clutches engaging at the same time, causing power path conflict and thus damaging core components such as the engine 110, planetary gear set 200 or reversing assembly 330.

[0066] Specifically, when the vehicle needs to enter forward driving mode, the transmission component 400 receives the corresponding command and sends a closing electrical signal to the first clutch 310, while simultaneously sending a disengagement electrical signal to the second clutch 320, so that the first clutch 310 can reliably engage to establish a direct power transmission path, while the second clutch 320 remains disengaged to cut off the reversing power path; when it needs to switch to reverse driving mode, the transmission component 400 outputs a control signal in the opposite direction to control the first clutch 310 to disengage and the second clutch 320 to engage, thereby changing the power direction through the reversing assembly 330.

[0067] In this embodiment, both the first clutch 310 and the second clutch 320 can be wet clutches, and the transmission component 400 can be an automatic mechanical transmission. The automatic mechanical transmission includes an electronic control unit, a hydraulic control unit, and two solenoid valves. Both solenoid valves are connected to the hydraulic control unit and are directly controlled by the electronic control unit. Each solenoid valve corresponds one-to-one with one of the two wet clutches, and the output oil circuit of each solenoid valve is connected to the hydraulic actuator of the corresponding clutch, such as the oil chamber of the clutch piston.

[0068] When the electronic control unit needs to engage the first clutch 310, it sends an electrical signal to the solenoid valve controlling the first clutch 310. Upon receiving the signal, the solenoid valve opens the oil passage to the oil chamber of the first clutch 310, allowing high-pressure hydraulic oil to flow in and push the piston to press the clutch friction plates together, thus engaging the clutch. Simultaneously, the electronic control unit ensures that the solenoid valve controlling the second clutch 320 is de-energized, its corresponding oil passage remains closed, and the second clutch 320 is in the disengaged state.

[0069] Conversely, when it is necessary to switch to the second clutch 320, the electronic control unit will cut off the power supply to the solenoid valve of the first clutch 310, causing its oil circuit to depressurize and the first clutch 310 to disengage; at the same time, it will energize the solenoid valve of the second clutch 320, causing its oil circuit to open and the second clutch 320 to engage under hydraulic action.

[0070] Continue reading Figure 1 In some embodiments, the hybrid powertrain also includes a brake 500. The hybrid powertrain includes a pure electric mode and a hybrid mode. In the pure electric mode, the brake 500 fixes the planetary carrier 220, and at least one of the first motor 120 and the second motor 130 drives the ring gear 230. In the hybrid mode, the brake 500 releases the planetary carrier 220, and the engine 110, the first motor 120, and the second motor 130 jointly drive the ring gear 230.

[0071] Thus, the brake 500 is set to correspond with the planetary carrier 220 to selectively fix the rotation state of the planetary carrier 220. In conjunction with the coordinated work of the engine 110, the dual motors and the planetary gear set 200, the hybrid powertrain has two core operating modes: pure electric mode and hybrid mode, which can adapt to the power requirements under different working conditions.

[0072] In pure electric mode, the brake 500 fixes the planetary carrier 220 and drives the gear ring 230 through the second motor 130, corresponding to the pure electric first gear working mode; or, the gear ring 230 is driven by the first motor 120 and the second motor 130 together, corresponding to the pure electric second gear working mode.

[0073] In hybrid mode, the vehicle control system sends a release command to the brake 500 according to the power demand. The brake 500 releases the fixation of the planetary carrier 220, allowing the planetary carrier 220 to regain its rotational freedom. At this time, the power of the engine 110 is transmitted to the planetary carrier 220 through the transmission path and drives it to rotate. At the same time, the output torque of the first motor 120 works in conjunction with the power of the planetary carrier 220, and together drive the ring gear 230 to rotate through the power coupling effect of the planetary gear set 200, forming a superimposed output with the power of the second motor 130.

[0074] In hybrid mode, the engine 110, the first motor 120 and the second motor 130 work together to provide stronger power reserves, which can be adapted to heavy-duty operations, climbing, high-speed driving and other scenarios that require high torque output, thus balancing power performance and operating efficiency.

[0075] It is understandable that, such as Figure 1 As shown, the brake 500 can be disposed between the housing 600 and the planetary carrier 220.

[0076] Furthermore, the hybrid powertrain also includes a reverse mode. In the reverse mode, the brake 500 releases the planetary carrier 220, the first clutch 310 disengages and the second clutch 320 engages, so as to transmit the power of the engine 110 to the planetary carrier 220, causing the planetary carrier 220 to rotate in the second rotation direction, and the first motor 120 drives the ring gear 230 to rotate in the second rotation direction.

[0077] In reverse mode, the first motor 120 operates as an electric motor, driving the ring gear 230 to rotate synchronously in the second rotation direction, causing the planetary carrier 220 and the ring gear 230 to rotate in the same direction. Thus, through the gear meshing of the planetary gear set 200, a power coupling is formed. The mechanical power provided by the engine 110 and the electric power provided by the first motor 120 are superimposed and act together on the ring gear 230, providing it with a continuous and sufficient reverse driving force, achieving stable reversing.

[0078] See Figure 2 In other embodiments, the hybrid powertrain also includes a brake 500 disposed between the planet carrier 220 and the ring gear 230.

[0079] In this design, the brake 500 is installed between the planetary carrier 220 and the ring gear 230. The fixed end of the brake 500 is connected to the extension structure of the planetary carrier 220, and the actuating end of the brake 500 is adapted to the corresponding mounting surface of the ring gear 230. Selective locking and disengagement of the two are achieved through hydraulic or electromagnetic drive. When the brake 500 is locked, the planetary carrier 220 and the ring gear 230 form a rigid connection and rotate synchronously. The planetary gear set 200 loses its power splitting function and transforms into a rigid transmission mechanism, which can be adapted to scenarios with high transmission efficiency requirements, such as high-speed cruising.

[0080] For example, by disengaging the brake 500, the gear ring 230 is driven by the second motor 130. Since the gear ring 230 can be connected to the output shaft of the device, power can be transmitted to the output shaft, enabling the device to operate in pure electric mode.

[0081] Furthermore, by disengaging the brake 500, the gear ring 230 is driven by the engine 110, the first motor 120, and the second motor 130, corresponding to the hybrid first gear working mode; by closing the brake 500, the gear ring 230 is driven by the engine 110, the first motor 120, and the second motor 130, corresponding to the hybrid second gear working mode.

[0082] See Figure 3 In other embodiments, the hybrid powertrain also includes a brake 500 disposed between the first motor 120 and the gear ring 230.

[0083] The brake 500 has two ends connected to the output shaft of the first motor 120 and the gear ring 230 via flanges, splines and other structures, respectively, which can selectively lock or separate the two.

[0084] In the locked state, the first motor 120 and the gear ring 230 rotate synchronously. The first motor 120 can directly drive the gear ring 230 to output power, or it can drive the first motor 120 to generate electricity through the gear ring 230 during regenerative braking. In the unlocked state, the two operate independently. The first motor 120 can provide auxiliary drive, while the gear ring 230 receives power transmitted from the planetary carrier 220. In this way, the power relationship between the first motor 120 and the gear ring 230 can be flexibly adjusted to adapt to the power distribution needs under various operating conditions.

[0085] For example, by disengaging the brake 500, the gear ring 230 is driven by the second motor 130, corresponding to the pure electric first gear working mode; or, by closing the brake 500, the gear ring 230 is driven by the first motor 120 and the second motor 130 together, corresponding to the pure electric second gear working mode.

[0086] Furthermore, by disengaging the brake 500, the gear ring 230 is driven by the engine 110, the first motor 120, and the second motor 130, corresponding to the hybrid first gear working mode; by closing the brake 500, the gear ring 230 is driven by the engine 110, the first motor 120, and the second motor 130, corresponding to the hybrid second gear working mode.

[0087] See Figures 1 to 3 In some examples, the hybrid powertrain also includes two drive components 700, with a first motor 120 rotatably connected to a sun gear 210 via one of the two drive components 700, and a second motor 130 rotatably connected to a ring gear 230 via the other of the two drive components 700.

[0088] Thus, by setting two transmission components 700 as the power transmission medium between the first motor 120 and the sun gear 210, and between the second motor 130 and the gear ring 230, the high efficiency and stability of power transmission are ensured.

[0089] The transmission component 700 may adopt mechanical transmission structures such as gear transmission mechanism, spline transmission structure or pulley transmission mechanism according to the requirements of power transmission torque, installation space and transmission efficiency. The embodiments of this application do not limit this.

[0090] For example, taking the transmission component 700 as a spline transmission structure, the first motor 120 is rotatably connected to the sun gear 210 through the spline transmission structure. The spline transmission structure may include a spline shaft and a spline sleeve. The spline shaft is integrally formed or fixedly connected to the motor output shaft, and the spline sleeve is fixedly assembled to the sun gear 210. Power transmission is achieved through the meshing of the spline teeth, which has both reliable connection and convenient disassembly and assembly.

[0091] In a specific example, the transmission assembly 700 includes a transmission shaft 710 and two transmission gears 720. The two transmission gears 720 are respectively disposed at both ends of the transmission shaft 710. One of the two transmission gears 720 is connected to the corresponding first motor 120 or second motor 130, and the other meshes with the toothed ring 231 on the corresponding sun gear 210 or gear ring 230.

[0092] Among them, the drive shaft 710, as the core carrier of power transmission, can be a solid shaft structure formed in one piece; the drive gear 720 can be made of high-strength alloy material, and the gear teeth are precision ground and heat treated to have sufficient hardness, wear resistance and impact resistance.

[0093] Two transmission gears 720 are fixedly mounted at both ends of the transmission shaft 710. The fixing method can be key connection, spline fit or interference fit. At the same time, axial positioning can be achieved by shaft shoulder, elastic retaining ring or lock nut to prevent axial movement of the transmission gears 720 during transmission and ensure the stability of meshing.

[0094] For example, a transmission gear 720 serves as a power input end and establishes a transmission connection with the corresponding first motor 120 or second motor 130. Specifically, it can mesh with the drive gear on the motor output shaft through gear meshing, or be directly fixedly connected to the motor output shaft through a spline structure, so that the torque output by the motor can be completely transmitted to the transmission shaft 710.

[0095] Another transmission gear 720 serves as the power output end, precisely meshing with the corresponding planetary gear set 200 sun gear 210 or the gear ring 230. If connected to the sun gear 210, the transmission gear 720 directly meshes with the teeth on the outer edge of the sun gear 210, driving the sun gear 210 to rotate synchronously; if connected to the gear ring 230, it meshes with the gear ring 231 on the inner or outer side of the gear ring 230, realizing the transmission of power to the gear ring 230.

[0096] This application also provides a device, including a device body and a hybrid powertrain as described in any of the above embodiments disposed on the device body.

[0097] The specific structure and working principle of the hybrid powertrain are the same as those in the previous embodiments, and will not be described again in this application.

[0098] In this embodiment, the equipment can be construction machinery, such as excavators, loaders, bulldozers, forklifts, stackers, pallet trucks, road rollers, pavers, milling machines, etc. Alternatively, the equipment can also be other types of vehicles such as trucks, cars, and passenger vehicles. This embodiment does not impose any limitations on this.

[0099] For example, the device body may include a vehicle control system and a power module. The vehicle control system establishes a signal connection with the transmission component 400, the first motor 120, and the second motor 130 of the hybrid powertrain. It can send control commands to the hybrid powertrain in real time according to the operating conditions of the device, such as starting, accelerating, climbing, and reversing, to adjust the working mode of the engine 110 and the dual motors, as well as the clutch engagement state, so as to achieve precise switching of power transmission path and output direction.

[0100] The power module can provide electrical power to components such as the first motor 120 and the second motor 130. It can also receive and store the electrical energy generated by the first motor 120 when it acts as a generator, thus forming an energy recovery and recycling mechanism.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A hybrid powertrain, characterized in that, include: The powertrain components include an engine, a first motor, and a second motor; The planetary gear set includes the sun gear, planet carrier, and gear ring; The first motor is connected to the sun gear, and the second motor is connected to the gear ring; The reversing mechanism includes a first clutch, a second clutch, and a reversing assembly. The first clutch is connected to the engine and the planetary carrier, respectively. The second clutch is connected in parallel with the first clutch via the reversing assembly and is also connected to the engine and the planetary carrier via the reversing assembly. The first clutch is configured to engage when the second clutch is disengaged to transmit power from the engine to the planetary carrier, causing the planetary carrier to rotate in a first rotation direction. The second clutch is configured to engage when the first clutch is disengaged to transmit power from the engine to the planetary carrier via the reversing assembly, causing the planetary carrier to rotate in a second rotation direction opposite to the first rotation direction.

2. The hybrid powertrain according to claim 1, characterized in that, The reversing assembly includes a first gear pair; the first gear pair includes two meshing first gears, one of which is connected to the output shaft of the engine and the other is connected to the second clutch.

3. The hybrid powertrain according to claim 1, characterized in that, The reversing assembly further includes a second gear pair; the second gear pair includes three sequentially meshing second gears, one of the two second gears located on the outer edge being connected to the planet carrier, and the other being connected to the second clutch.

4. The hybrid powertrain according to claim 1, characterized in that, It also includes a transmission component, to which both the first clutch and the second clutch are electrically connected. The transmission component is used to adjust the engagement state of the first clutch and the second clutch.

5. The hybrid powertrain according to any one of claims 1 to 4, characterized in that, It also includes a brake, and the hybrid powertrain includes a pure electric mode and a hybrid mode. In the pure electric mode, the brake fixes the planetary carrier, and at least one of the first motor and the second motor drives the ring gear. In the hybrid mode, the brake releases the planetary carrier, and the engine, the first motor, and the second motor jointly drive the gear ring.

6. The hybrid powertrain according to any one of claims 1 to 4, characterized in that, It also includes a brake disposed between the planetary carrier and the ring gear; or, The brake is positioned between the first motor and the gear ring.

7. The hybrid powertrain according to claim 5, characterized in that, The hybrid powertrain also includes a reverse mode, in which the brake releases the planetary carrier, the first clutch disengages and the second clutch engages to transmit the power of the engine to the planetary carrier, causing the planetary carrier to rotate in the second rotation direction, and the first motor drives the ring gear to rotate in the second rotation direction.

8. The hybrid powertrain according to any one of claims 1 to 4, characterized in that, It also includes two transmission components. The first motor is rotatably connected to the sun gear through one of the two transmission components, and the second motor is rotatably connected to the gear ring through the other of the two transmission components.

9. The hybrid powertrain according to claim 8, characterized in that, The transmission assembly includes a transmission shaft and two transmission gears. The two transmission gears are respectively disposed at both ends of the transmission shaft. One of the two transmission gears is connected to the corresponding first motor or second motor, and the other meshes with the corresponding sun gear or the gear ring on the gear ring.

10. A device, characterized in that, It includes a device body and a hybrid powertrain as described in any one of claims 1 to 9 disposed on the device body.

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