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, second motor, sun gear, planet carrier, ring gear and reversing mechanism;First motor is connected with sun gear, engine is connected with planet carrier, and second motor is used to be connected with the output shaft of vehicle.Reversing mechanism includes first clutch, second clutch and reversing assembly, and first clutch and second clutch are connected in parallel between ring gear and output shaft through reversing assembly.The hybrid power assembly provided by the application, in the reverse working condition, when first clutch is disconnected and second clutch is attracted, engine power is transmitted to ring gear through planetary row, and then transmitted to output shaft after changing the rotation direction through reversing assembly, so that engine can participate in the power output of reversing;At the same time, the second motor can provide auxiliary power or adjust the speed, and the composite power output mode is beneficial to reduce the power demand of second motor and reduce 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, the engine is connected to the planet carrier, and the second motor is used to connect to the vehicle's output shaft.

[0009] A reversing mechanism includes a first clutch, a second clutch, and a reversing assembly. The first clutch and the second clutch are connected in parallel between a gear ring and an output shaft via the reversing assembly. The first clutch is configured to engage when the second clutch is disengaged to transmit power from the gear ring to the output shaft, causing the output shaft 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 gear ring to the output shaft via the reversing assembly, causing the output shaft 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 a first end of a first clutch and an output shaft, and the other is connected to a first end of a second clutch.

[0011] In one possible implementation, the hybrid powertrain provided in this application further includes an idler wheel and a second gear pair in the commutation assembly; the second gear pair includes two meshing second gears, the idler wheel is disposed between two first gears, the two first gears are driven by the idler wheel meshing, one of the two second gears is connected to the gear ring and the second end of the first clutch, and the other is connected to the second end of the second clutch.

[0012] In one possible implementation, the hybrid powertrain provided in this application has a first gear ring on the outer periphery of the gear ring, and the commutation assembly further includes a third gear and a fourth gear. The first gear ring meshes with the third gear, the third gear is connected to the second end of the first clutch, and the fourth gear meshes with one of the two first gears. One of the two first gears is used to connect to the output shaft through the fourth gear.

[0013] In one possible implementation, the hybrid powertrain provided in this application further includes a second gear ring on the outer periphery of the gear ring, and the commutation assembly also includes a fifth gear; the second gear ring meshes with the fifth gear, and the fifth gear is connected to the second end of the second clutch.

[0014] In one possible implementation, the hybrid powertrain provided in this application has a second motor that is a hollow shaft motor located between a gear ring and a first clutch. The rotor of the hollow shaft motor is used to connect to the output shaft, and the output end of the gear ring passes through the central cavity of the hollow shaft motor to connect to one of the two second gears.

[0015] In one possible implementation, the hybrid powertrain provided in this application further includes a sixth gear and a drive shaft in the commutation mechanism, with the second motor connected to the sixth gear and the sixth gear connected to the fourth gear via the drive shaft.

[0016] In one possible implementation, the hybrid powertrain provided in this application further includes a brake disposed between the ring gear and the planetary carrier;

[0017] The hybrid powertrain includes a rigid drive mode and a hybrid mode. In the rigid drive mode, the brake locks the ring gear and planetary carrier to transmit power to the output shaft through at least one of the engine, the first motor, and the second motor. In the hybrid mode, the brake disengages the ring gear and planetary carrier, allowing the engine and the first motor to drive the ring gear together.

[0018] In one possible implementation, the hybrid powertrain provided in this application further includes a reversing mode, in which the brake disengages the ring gear and planetary carrier, the first clutch disengages and the second clutch engages to transmit the engine's power to the output shaft, causing the output shaft to rotate in a second rotation direction, and the first motor drives the ring gear to rotate in the second rotation direction.

[0019] On the other hand, this application provides a device including a device body and a power assembly as 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 mechanism. 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 first motor is connected to the sun gear, the engine is connected to the planet carrier, and the second motor is connected to the vehicle's output shaft. The commutation mechanism includes a first clutch, a second clutch, and a commutation assembly. The first and second clutches are connected in parallel between the ring gear and the output shaft via the commutation assembly. The first clutch is configured to engage when the second clutch is disengaged to transmit power from the ring gear to the output shaft, causing the output shaft 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 ring gear to the output shaft via the commutation assembly, causing the output shaft to rotate in a second rotation direction opposite to the first rotation direction.

[0021] Thus, in reversing mode, when the second clutch engages, the engine power is transmitted to the ring gear through the planetary gear set, and then transmitted to the output shaft after the rotation direction is changed by the reversing assembly, enabling the engine to participate in reversing power output; at the same time, the second motor can provide auxiliary power or adjust the speed. The composite power output mode helps to reduce the power demand of the second motor and reduce power 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] Explanation of reference numerals in the attached figures:

[0026] 100 - Power assembly; 110 - Engine; 120 - First motor; 130 - Second motor;

[0027] 200 - Planetary gear set; 210 - Sun gear; 220 - Planet carrier; 230 - Gear ring; 231 - First gear ring; 232 - Second gear ring;

[0028] 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; 333 - Idler gear; 334 - Third gear; 335 - Fourth gear; 336 - Fifth gear; 340 - Sixth gear; 350 - Drive shaft;

[0029] 400 - Automatic mechanical transmission; 500 - Brake;

[0030] 600 - Output shaft. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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 mechanism. 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 first motor is connected to the sun gear, the engine is connected to the planet carrier, and the second motor is connected to the output shaft of the vehicle. The commutation mechanism includes a first clutch, a second clutch, and a commutation assembly. The first clutch and the second clutch are connected in parallel between the ring gear and the output shaft via the commutation assembly. The first clutch is configured to engage when the second clutch is disengaged to transmit power from the ring gear to the output shaft, causing the output shaft 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 ring gear to the output shaft via the commutation assembly, causing the output shaft to rotate in a second rotation direction opposite to the first rotation direction.

[0039] Thus, in reversing mode, when the second clutch engages, the engine power is transmitted to the ring gear through the planetary gear set, and then transmitted to the output shaft after the rotation direction is changed by the reversing assembly, enabling the engine to participate in reversing power output; at the same time, the second motor can provide auxiliary power or adjust the speed. The composite power output mode helps to reduce the power demand of the second motor and reduce power consumption.

[0040] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0041] See Figure 1 The 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, the engine 110 is connected to the planet carrier 220, and the second motor 130 is used to connect to the output shaft 600 of the vehicle.

[0042] The reversing mechanism 300 includes a first clutch 310, a second clutch 320, and a reversing assembly 330. The first clutch 310 and the second clutch 320 are connected in parallel between the gear ring 230 and the output shaft 600 via the reversing assembly 330. The first clutch 310 is configured to engage when the second clutch 320 is disengaged, so as to transmit the power of the gear ring 230 to the output shaft 600, causing the output shaft 600 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 gear ring 230 to the output shaft 600 via the reversing assembly 330, so as to cause the output shaft 600 to rotate in a second rotation direction opposite to the first rotation direction.

[0043] Specifically, the planetary gear set 200, serving as the core of the power coupling, comprises three basic components: a sun gear 210, a planet carrier 220, and a ring gear 230. It connects the first output shaft of the first motor 120 to the sun gear 210. By precisely adjusting the speed and torque of the sun gear 210, the transmission ratio and power distribution of the entire planetary gear set 200 can be controlled. When the engine 110 is operating, the first motor 120 can convert some mechanical energy into electrical energy for storage, while simultaneously adjusting its own speed to keep the engine 110 within its optimal operating range. During low-speed, pure electric operation, the first motor 120 can also be used as a drive motor, improving energy efficiency in urban conditions.

[0044] Furthermore, the second output shaft of the engine 110 is connected to the planetary carrier 220, so that the power of the engine 110 can be efficiently input to the planetary gear set 200, forming a stable power input structure; the third output shaft of the second motor 130 is connected to the output shaft 600 of the equipment, ensuring that the electric drive force can be efficiently transmitted to the wheels of the equipment.

[0045] The reversing mechanism 300 is a key component for achieving bidirectional power output, including a first clutch 310, a second clutch 320, and a reversing assembly 330. In terms of mechanical layout, the first clutch 310 and the second clutch 320 form two parallel power transmission paths through the reversing assembly 330. These two paths are jointly located between the ring gear 230 of the planetary gear set 200 and the output shaft 600 of the device.

[0046] The first clutch 310 is configured as a direct power transmission path. When the second clutch 320 is disengaged, the first clutch 310 engages, directly transmitting the rotational power of the gear ring 230 to the output shaft 600, causing the output shaft 600 to rotate in the first rotation direction, i.e., the forward direction of normal equipment travel. The second clutch 320 works in conjunction with the reversing assembly 330. When the first clutch 310 disengages, the second clutch 320 engages, and the power of the gear ring 230 is transmitted to the output shaft 600 after changing its rotational direction through the direction-changing mechanism in the reversing assembly 330, such as the idler gear 333 or the reverse gear set, thereby causing the output shaft 600 to rotate in the reverse direction of the equipment, which is opposite to the first rotation direction.

[0047] For example, under the forward operating condition of normal equipment operation, the first clutch 310 is engaged and the second clutch 320 is disengaged. The power of the engine 110 is input through the planetary carrier 220. Through the power splitting effect of the planetary gear 200, part of the power is transmitted to the ring gear 230 and directly transmitted to the output shaft 600 through the first clutch 310. At the same time, the second motor 130 can provide auxiliary power or generate electricity as needed.

[0048] In the reverse driving mode, the second clutch 320 engages, the first clutch 310 disengages, and the power from the engine 110 is also input to the planetary carrier 220. After being transmitted through the planetary gear set 200 to the ring gear 230, the direction is changed by the reversing assembly 330, allowing the power from the engine 110 to participate in the reverse drive, thereby reducing the load on the second motor 130. At this time, the second motor 130 can be used to adjust the speed of the output shaft 600 and provide additional torque, reducing power consumption.

[0049] In summary, the hybrid powertrain provided in this application embodiment, when the second clutch 320 is engaged in reversing mode, transmits power from the engine 110 to the ring gear 230 via the planetary gear set 200, and then transmits it to the output shaft 600 after the rotation direction is changed by the reversing assembly 330, enabling the engine 110 to participate in reversing power output; at the same time, the second motor 130 can provide auxiliary power or adjust the speed. The combined power output mode helps to reduce the power demand of the second motor 130 and reduce electricity consumption.

[0050] The following, combined with Figure 1The first structure of the commutation component 330 in the embodiments of this application will be described.

[0051] In some examples, 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 a first end of a first clutch 310 and an output shaft 600, and the other is connected to a first end of a second clutch 320.

[0052] Thus, the arrangement of the two first gears 3311 forms the basic structure of the reversing assembly 330, which helps to improve the smoothness of gear shifting and the system response speed, ensure the high efficiency of power transmission, and reduce energy loss.

[0053] One of the two first gears 3311 can be fixedly connected to the first end of the first clutch 310 by a spline connection, and the output end of the first gear 3311 is connected to the output shaft 600 of the vehicle to form a direct power transmission path; the other first gear 3311 is firmly connected to the first end of the second clutch 320 to form the starting end of the reversing power transmission path.

[0054] To further improve the power transmission link, the reversing assembly 330 also includes an idler wheel 333 and a second gear pair 332; the second gear pair 332 includes two meshing second gears 3321, the idler wheel 333 is disposed between the two first gears 3311, the two first gears 3311 are driven by the idler wheel 333, one of the two second gears 3321 is connected to the gear ring 230 and the second end of the first clutch 310, and the other is connected to the second end of the second clutch 320.

[0055] Specifically, one of the second gears 3321 is rigidly connected to the ring gear 230 of the planetary gear set 200 via a connecting shaft, and the second gear 3321 is also fixedly connected to the second end of the first clutch 310, forming a direct power transmission path; the other second gear 3321 is fixedly connected to the second end of the second clutch 320, forming a reversing power transmission path.

[0056] In this embodiment, when the first clutch 310 is engaged, the power transmission sequentially passes through: the gear ring 230, one of the two second gears 3321, the second end of the first clutch 310, the first end of the first clutch 310, one of the two first gears 3311, and the output shaft 600. It is understood that the power direction in this power transmission path remains unchanged, causing the output shaft 600 to rotate along the first rotation direction.

[0057] When the second clutch 320 engages, the power transmission proceeds sequentially through: the gear ring 230, one of the two second gears 3321, the other of the two second gears 3321, the second end of the second clutch 320, the first end of the second clutch 320, the other of the two first gears 3311, the idler gear 333, one of the two first gears 3311, and the output shaft 600. It can be understood that due to the intervention of the idler gear 333, the power transmission direction is reversed, thereby causing the output shaft 600 to rotate in a second rotation direction opposite to the first rotation direction.

[0058] For example, both the first clutch 310 and the second clutch 320 can be wet clutches. The powertrain can integrate an automatic mechanical transmission 400, which 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.

[0059] 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.

[0060] 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.

[0061] In a specific implementation, the second motor 130 is a hollow shaft motor, which is located between the gear ring 230 and the first clutch 310. The rotor of the hollow shaft motor is used to connect with the output shaft 600. The output end of the gear ring 230 passes through the central cavity of the hollow shaft motor to connect with one of the two second gears 3321.

[0062] This allows for an optimized layout of the second motor 130, improving the integration of the powertrain. Integrating the planetary gear set 200 and the commutation mechanism 300 within the gearbox also helps reduce the gearbox size.

[0063] The rotor of the hollow shaft motor is precision-machined to form a hollow channel. The outer circumference of the rotor is rigidly fixed to the output shaft 600 via a spline or flange connection, ensuring that the motor power can be directly and efficiently transmitted to the output shaft 600. Simultaneously, the output end of the gear ring 230 can be configured as an extension shaft structure. The extension shaft passes through the central cavity of the hollow shaft motor rotor and connects to one of the two second gears 3321, providing the engine 110 with a power transmission path that causes the output shaft 600 to rotate in the first direction.

[0064] The following, combined with Figure 2 The second structure of the commutation component 330 in the embodiments of this application will be described.

[0065] 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 first end of the first clutch 310 and the output shaft 600, and the other is connected to the first end of the second clutch 320.

[0066] The arrangement of the two first gears 3311 is the same as in the previous embodiment, and will not be described again in this embodiment.

[0067] To further improve the power transmission link, the outer periphery of the gear ring 230 is provided with a first gear ring 231. The reversing assembly 330 also includes a third gear 334 and a fourth gear 335. The first gear ring 231 meshes with the third gear 334. The third gear 334 is connected to the second end of the first clutch 310. The fourth gear 335 meshes with one of the two first gears 3311. One of the two first gears 3311 is used to connect to the output shaft 600 through the fourth gear 335.

[0068] The meshing method between the first gear ring 231 and the third gear 334 is conducive to optimizing the spatial layout, avoiding the reduction of structural strength caused by opening a hole in the center of the gear ring 230, and improving the load-bearing capacity and durability of the planetary gear set 200 structure, so that the power of the engine 110 can be efficiently transmitted to the first clutch 310.

[0069] In this embodiment, when the first clutch 310 engages and the second clutch 320 disengages, the power transmission path is as follows: the power from the engine 110 is input to the planetary gear set 200 via the planetary carrier 220, and transmitted to the ring gear 230 through power splitting. The first gear ring 231 on the outer circumference of the ring gear 230 drives the third gear 334 to rotate. The third gear 334 transmits power to the second end of the first clutch 310, and then transmits it through the interior of the first clutch 310 to its first end, which then drives the first gear 3311 connected to it. The first gear 3311 drives the fourth gear 335, and the fourth gear 335 drives the output shaft 600 to rotate. It can be understood that the power transmission direction remains unchanged in this path, and the output shaft 600 rotates along the first rotation direction, corresponding to the forward operating condition of the equipment.

[0070] Furthermore, the outer periphery of the gear ring 230 is also provided with a second gear ring 232, and the reversing assembly 330 also includes a fifth gear 336; the second gear ring 232 meshes with the fifth gear 336, and the fifth gear 336 is connected to the second end of the second clutch 320.

[0071] In this embodiment, when the second clutch 320 engages and the first clutch 310 disengages, the power transmission path changes as follows: the second gear ring 232 on the outer circumference of the gear ring 230 drives the fifth gear 336, which transmits power to the second end of the second clutch 320. Power is then transmitted through the second clutch 320 to the first end, driving the connected first gear 3311 to rotate. This first gear 3311, through meshing, drives another first gear 3311, which in turn drives the fourth gear 335, ultimately transmitting power to the output shaft 600. It is understood that in this path, the power transmission direction is reversed, and the output shaft 600 rotates in the second rotation direction, corresponding to the reversing operation of the equipment.

[0072] Overall, the embodiments of this application enable the engine 110 to participate in reversing drive, avoiding the power depletion problem that occurs when reversing relies entirely on the motor, which helps to reduce power consumption and extend the pure electric reversing range.

[0073] In a specific implementation, the reversing mechanism 300 also includes a sixth gear 340 and a transmission shaft 350. The second motor 130 is connected to the sixth gear 340, and the sixth gear 340 is connected to the fourth gear 335 through the transmission shaft 350.

[0074] Thus, when driven purely by the second motor 130, the sixth gear 340 and the drive shaft 350 provide driving torque to the fourth gear 335, which can more precisely adjust the speed of the output shaft 600, so that the equipment accelerates smoothly and avoids the jerking caused by sudden changes in speed.

[0075] The output end of the second motor 130 can be rigidly fixed to the sixth gear 340 through a spline or flange connection. The sixth gear 340 is connected to the fourth gear 335 through a transmission shaft 350. Both ends of the transmission shaft 350 can be supported by bearings to ensure the stability and concentricity of the sixth gear 340 and the fifth gear 336 when rotating at high speed.

[0076] See Figure 1 and Figure 2 In some examples, the hybrid powertrain also includes a brake 500 disposed between the ring gear 230 and the planetary carrier 220; the hybrid powertrain includes a rigid drive mode and a hybrid mode, in which the brake 500 locks the ring gear 230 and the planetary carrier 220 to transmit power to the output shaft 600 via at least one of the engine 110, the first motor 120 and the second motor 130; in the hybrid mode, the brake 500 disengages the ring gear 230 and the planetary carrier 220, allowing the engine 110 and the first motor 120 to jointly drive the ring gear 230.

[0077] For example, the brake 500 can selectively lock and disengage the engine 110 and the first motor 120 through hydraulic or electromagnetic drive, and the embodiments of this application do not limit this.

[0078] In the rigid transmission mode, the brake 500 can lock the gear ring 230 and the planetary carrier 220 into a whole by pressing the friction plate assembly, so that the planetary gear set 200 loses its differential function. At this time, the power of the engine 110 can be directly transmitted to the reversing mechanism 300 through the planetary carrier 220 and the locked gear ring 230. At the same time, the first motor 120 and the second motor 130 can provide auxiliary power or generate electricity as needed, so as to be suitable for stable working conditions such as high-speed cruising, reduce system energy conversion loss, and improve transmission efficiency.

[0079] In hybrid mode, the vehicle control system sends a release command to the brake 500 according to power demand. The brake 500 separates the ring gear 230 and the planetary carrier 220, restoring their respective rotational degrees of freedom. At this time, the power of the engine 110 is transmitted to the planetary carrier 220 through the transmission path, driving it to rotate. Simultaneously, the first motor 120 can switch to electric motor mode according to operating conditions, and its output torque works in conjunction with the power of the planetary carrier 220. Through the power coupling effect of the planetary gear set 200, they jointly drive the ring gear 230 to rotate, forming a superimposed output with the power of the second motor 130.

[0080] 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.

[0081] Furthermore, the hybrid powertrain also includes a reverse mode, in which the brake 500 disengages the gear ring 230 and 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 output shaft 600, causing the output shaft 600 to rotate in the second rotation direction, and the first motor 120 drives the gear ring 230 to rotate in the second rotation direction.

[0082] 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 output shaft 600, providing the output shaft 600 with a continuous and sufficient reverse driving force, achieving stable reversing.

[0083] In a practical implementation, the brake 500 can also be positioned between the gear ring 230 and the housing of the device (not shown in the figure), that is, the brake 500 is fixed to the housing, and the locking and releasing of the gear ring 230 is controlled by the brake 500. Thus, when the brake 500 locks the gear ring 230, both the first clutch 310 and the second clutch 320 are disengaged, allowing the engine 110 to drive the first motor 120 to generate electricity, realizing the range-extending mode function.

[0084] This application also provides a device, including a device body and a powertrain as described in any of the above embodiments, disposed on the device body.

[0085] 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.

[0086] 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.

[0087] For example, the device body may include a vehicle control system and a power module. The vehicle control system can establish a signal connection with the automatic mechanical transmission 400, engine 110, first motor 120, and second motor 130 in the aforementioned embodiments. It can send control commands to the hybrid powertrain in real time according to the device's operating conditions, such as starting, accelerating, climbing, and reversing, to adjust the operating modes of the engine 110, first motor 120, and second motor 130, as well as the clutch engagement state, so as to achieve precise switching of power transmission path and output direction.

[0088] 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.

[0089] 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 by, 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, the engine is connected to the planetary carrier, and the second motor is used to connect to the vehicle's output shaft. A reversing mechanism includes a first clutch, a second clutch, and a reversing assembly. The first clutch and the second clutch are connected in parallel between the gear ring and the output shaft via the reversing assembly. The first clutch is configured to engage when the second clutch is disengaged to transmit power from the gear ring to the output shaft, causing the output shaft 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 gear ring to the output shaft via the reversing assembly, causing the output shaft to rotate in a second rotation direction opposite to the first rotation direction.

2. The hybrid assembly of claim 1, wherein, The reversing assembly includes a first gear pair; the first gear pair includes two meshing first gears, one of which is connected to a first end of the first clutch and the output shaft, and the other is connected to a first end of the second clutch.

3. The hybrid assembly of claim 2, wherein, The reversing assembly further includes an idler gear and a second gear pair; the second gear pair includes two meshing second gears, the idler gear is disposed between the two first gears, the two first gears are driven by meshing through the idler gear, one of the two second gears is connected to the gear ring and the second end of the first clutch, and the other is connected to the second end of the second clutch.

4. The hybrid assembly of claim 2, wherein, The outer periphery of the gear ring is provided with a first gear ring, and the reversing assembly further includes a third gear and a fourth gear. The first gear ring meshes with the third gear, the third gear is connected to the second end of the first clutch, and the fourth gear meshes with one of the two first gears. One of the two first gears is used to connect to the output shaft through the fourth gear.

5. The hybrid powertrain according to claim 4, characterized in that, The outer periphery of the gear ring is also provided with a second gear ring, and the reversing assembly further includes a fifth gear; the second gear ring meshes with the fifth gear, and the fifth gear is connected to the second end of the second clutch.

6. The hybrid assembly of claim 3, wherein, The second motor is a hollow shaft motor, which is located between the gear ring and the first clutch. The rotor of the hollow shaft motor is used to connect to the output shaft. The output end of the gear ring passes through the central cavity of the hollow shaft motor to connect to one of the two second gears.

7. The hybrid assembly of claim 4 or 5, wherein, The reversing mechanism also includes a sixth gear and a drive shaft. The second motor is connected to the sixth gear, and the sixth gear is connected to the fourth gear through the drive shaft.

8. The hybrid assembly of any one of claims 1-6, wherein, It also includes a brake disposed between the gear ring and the planet carrier; The hybrid powertrain includes a rigid drive mode and a hybrid mode. In the rigid drive mode, the brake locks the ring gear and the planetary carrier to transmit power to the output shaft via at least one of the engine, the first motor, and the second motor. In the hybrid mode, the brake disengages the ring gear and the planetary carrier, allowing the engine and the first motor to jointly drive the ring gear.

9. The hybrid assembly of claim 8, wherein, The hybrid powertrain also includes a reverse mode, in which the brake disengages the ring gear and the planetary carrier, the first clutch disengages and the second clutch engages to transmit the power of the engine to the output shaft, causing the output shaft to rotate in the second rotation direction, and the first motor drives the ring gear to rotate in the second rotation direction.

10. An apparatus, comprising: It includes the equipment body and the powertrain as described in any one of claims 1 to 9 disposed on the equipment body.

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