A power system

Abstract

The invention discloses a power system, which relates to the field of automobile power. The power system includes a first power source, a second power source, a planetary gear train and an output shaft, and the planetary gear train includes a sun gear, a planetary gear, a planetary carrier and a ring gear; the first power source is transmission-connected to the planetary carrier, the second power source is transmission-connected to the sun gear, and the planetary carrier can be transmission-connected or disconnected with the output shaft. The power system transmission-connects the first power source to the planetary carrier, the second power source to the sun gear, and the planetary carrier can be transmission-connected or disconnected with the output shaft. When the planetary carrier is transmission-connected to the output shaft, torque coupling can be achieved; when the planetary carrier is disconnected from the output shaft, speed coupling can be achieved. The power system provided by the invention has a simple structure, high transmission efficiency, and low cost; it has important scientific significance and practical value for the development of automobile technology.

Description

Technical Field

[0001] The present invention relates to the field of automobile power technology, and in particular to a power system. Background Art

[0002] The research on automobile power system has made a lot of significant progress in many developed countries or regions such as the United States, Europe, and Japan. Among them, the powertrain system technology with planetary gears as power splitting and power coupling mechanisms is the top priority.

[0003] The current single planetary gear power system coupling scheme can only achieve one of the speed coupling and torque coupling. For example, the first and second generation Toyota Puris both use single planetary gears to achieve speed coupling, but cannot achieve torque coupling. Although the power coupling device of the single row planetary gear in the prior art can achieve torque coupling, it has a complex structure, low efficiency and high cost. Summary of the invention

[0004] The object of the present invention is to provide a power system to solve the problems of complex structure, low efficiency and high cost of the power system in the prior art.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A power system, comprising a first power source, a second power source, a planetary gear train and an output shaft, wherein the planetary gear train comprises a sun gear, planetary gears, a planet carrier and a ring gear;

[0007] The first power source is drivingly connected to the planet carrier, the second power source is drivingly connected to the sun gear, and the planet carrier can be drivingly connected or disconnected from the output shaft.

[0008] Optionally, the power system further includes a brake and a first connecting component, wherein the brake is used to brake or release the ring gear, and the first connecting component is capable of connecting and disconnecting the planet carrier and the output shaft.

[0009] Optionally, the ring gear can be drivingly connected or disconnected from the output shaft.

[0010] Optionally, the power system further comprises a second connecting component, and the second connecting component is capable of connecting and disconnecting the ring gear and the output shaft.

[0011] Optionally, the first connecting component is a first clutch; or a first gear pair and a first synchronizer.

[0012] Optionally, the second connecting component is a second clutch; or a second gear pair and a second synchronizer.

[0013] Optionally, the first power source is any one of an engine and a motor.

[0014] Optionally, the second power source is any one of an engine and a motor.

[0015] Optionally, the power system further includes a drive axle, and the output shaft is connected to the drive axle.

[0016] Optionally, the first power source and the second power source are located on the same side of the planetary gear train; or the first power source and the second power source are located on two sides of the planetary gear train, respectively.

[0017] Beneficial effects of the present invention:

[0018] The power system provided by the present invention has a first power source connected to a planetary carrier by transmission, a second power source connected to a sun gear by transmission, and the planetary carrier can be connected or disconnected to an output shaft by transmission. When the planetary carrier is connected to the output shaft by transmission, torque coupling can be achieved; when the planetary carrier is disconnected from the output shaft, speed coupling can be achieved. The power system provided by the present invention has a simple structure, high transmission efficiency, and low cost; it has important scientific significance and practical value for the development of automobile technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a first structural schematic diagram of a power system provided by an embodiment of the present invention;

[0020] Figure 2 is a second structural schematic diagram of a power system provided by an embodiment of the present invention;

[0021] Figure 3 This is a third structural schematic diagram of the power system provided by an embodiment of the present invention.

[0022] In the figure:

[0023] 1. First power source; 2. Second power source; 3. Planetary gear train; 31. Sun gear; 32. Planet carrier; 33. Ring gear; 34. Planetary gear; 41. First clutch; 42. Second clutch; 5. Brake; 6. Output shaft; 7. Differential; 81. First gear pair; 82. Second gear pair; 91. First synchronizer; 92. Second synchronizer. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0026] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0029] like Figure 1-Figure 3 As shown, the power system provided by this embodiment includes a first power source 1, a second power source 2, a planetary gear train 3 and an output shaft 6, the planetary gear train 3 includes a sun gear 31, a planetary gear 34, a planetary carrier 32 and a ring gear 33, the sun gear 31 is meshed with the planetary gear 34, the planetary carrier 32 is used to connect the planetary gear 34, and the planetary gear 34 is meshed with the ring gear 33; the first power source 1 is transmission-connected to the planetary carrier 32, the second power source 2 is transmission-connected to the sun gear 31, and the planetary carrier 32 can be transmission-connected or disconnected with the output shaft 6.

[0030] The power system provided in this embodiment drives the first power source 1 to be connected to the planet carrier 32, the second power source 2 to be connected to the sun gear 31, and the planet carrier 32 can be connected to or disconnected from the output shaft 6. When the planet carrier 32 is connected to the output shaft 6, torque coupling can be achieved; when the planet carrier 32 is disconnected from the output shaft 6, speed coupling can be achieved. The power system provided in this embodiment has a simple structure, high transmission efficiency, and low cost; it has important scientific significance and practical value for the development of automobile technology.

[0031] Optionally, the power system further includes a brake 5 and a first connecting component, the brake 5 is used to brake or release the ring gear 33, and the first connecting component can connect and disconnect the planet carrier 32 with the output shaft 6. In this embodiment, when the first connecting component connects the planet carrier 32 with the output shaft 6, the planet carrier 32 is transmission-connected with the output shaft 6, the brake 5 brakes the ring gear 33, the output power of the first power source 1 is transmitted to the planet carrier 32, the output power of the second power source 2 passes through the sun gear 31, the sun gear 31 is meshed with the planet gear 34, the ring gear 33 is stationary, and the output power of the second power source 2 is transmitted to the planet carrier 32, the two power sources are coupled and output through the planet carrier 32, and finally transmitted to the output shaft 6 through the first connecting component to achieve torque coupling.

[0032] Optionally, the ring gear 33 can be connected or disconnected with the output shaft 6. Specifically, the power system further includes a second connecting component, which can connect or disconnect the ring gear 33 with the output shaft 6. In this embodiment, when the second connecting component combines the ring gear 33 with the output shaft 6, the ring gear 33 is connected to the output shaft 6 in transmission connection, the brake 5 is separated from the ring gear 33, and the ring gear 33 is released from the brake, and the first connecting component separates the planetary carrier 32 from the output shaft 6, and the planetary carrier 32 is disconnected from the output shaft 6. The output power of the first power source 1 passes through the planetary carrier 32, and the rotation of the planetary carrier 32 drives the planetary gear 34 to rotate, and the planetary gear 34 meshes with the ring gear 33, and the output power of the first power source 1 is transmitted to the ring gear 33; the output power of the second power source 2 passes through the sun gear 31, the sun gear 31 meshes with the planetary gear 34, the planetary gear 34 meshes with the ring gear 33, and is finally transmitted to the ring gear 33. The output power of the two power sources is coupled in the ring gear 33, and the ring gear 33 is connected to the output shaft 6 through the second connecting component, and finally the speed coupling is realized.

[0033] When the second connecting member disconnects the ring gear 33 from the output shaft 6, the ring gear 33 is disconnected from the output shaft 6, and the brake 5 brakes the ring gear 33. If the planet carrier 32 is connected to the output shaft 6 in a transmission manner, the power system realizes torque coupling; if the planet carrier 32 is disconnected from the output shaft 6, the power system can be in an idling state, and the idle charging function can be realized for the hybrid power system.

[0034] Optionally, the first power source 1 is any one of an engine and a motor; the second power source 2 is any one of an engine and a motor. In this embodiment, the first power source 1 is an engine and the second power source 2 is a motor. Of course, in other embodiments, the first power source 1 and the second power source 2 can be selected according to actual conditions.

[0035] Optionally, the power system further includes a drive axle, and the output shaft 6 is connected to the drive axle. In this embodiment, the power system further includes a reducer (not shown in the figure) and a drive axle (not shown in the figure), a differential 7 is installed in the drive axle, and the differential 7 is connected to the drive wheel through a half shaft; the output shaft 6 is connected to the differential 7 through the reducer, and the power is adjusted through the reducer, the differential 7 and the half shaft in sequence and then transmitted to the drive wheel.

[0036] Optionally, the first power source 1 and the second power source 2 are located on the same side of the planetary gear train 3; or the first power source 1 and the second power source 2 are located on both sides of the planetary gear train 3. In this embodiment, the first power source 1 and the second power source 2 are coaxially arranged with the planetary gear train 3, and the first power source 1 and the second power source 2 are located on the same side of the planetary gear train 3, and the output shaft 6 is located on the other side of the planetary gear train 3; through reasonable layout, the layout of the entire power system is reasonable, the structure is simple, and it is easy to control and operate. Of course, in other embodiments, the first power source 1 and the second power source 2 can also be located on both sides of the planetary gear train 3.

[0037] Optionally, the first connecting component is the first clutch 41; or the first gear pair 81 and the first synchronizer 91; the second connecting component is the second clutch 42; or the second gear pair 82 and the second synchronizer 92. Preferably, as Figure 1 As shown, the first connecting component is a first clutch 41, and the second connecting component is a second clutch 42. The first clutch 41 is arranged between the planet carrier 32 and the output shaft 6, and the second clutch 42 is arranged between the ring gear 33 and the output shaft 6.

[0038] The power system provided in this embodiment further includes a controller for controlling the opening or closing of the first clutch 41 and the second clutch 42. By controlling the opening or closing of the first clutch 41 and the second clutch 42, speed coupling and torque coupling are achieved.

[0039] The first clutch 41 is opened, the second clutch 42 is closed, the brake 5 releases the brake of the ring gear 33, and the output power of the engine and the motor is coupled and output through the ring gear 33 to achieve speed coupling.

[0040] In this embodiment, when the first clutch 41 is opened and the second clutch 42 is closed, the brake 5 releases the brake on the ring gear 33, and the output power of the engine passes through the planetary carrier 32. The rotation of the planetary carrier 32 drives the planetary gear 34 to rotate, and the planetary gear 34 meshes with the ring gear 33, and the output power of the engine is transmitted to the ring gear 33; the output power of the motor passes through the sun gear 31, the sun gear 31 meshes with the planetary gear 34, the planetary gear 34 meshes with the ring gear 33, and is finally transmitted to the ring gear 33. The output power of the two power sources is coupled in the ring gear 33, and is finally transmitted to the output shaft 6 through the second clutch 42. The output shaft 6 is connected to the wheels on both sides through the differential 7 and the half shafts, thereby driving the vehicle to travel, so that the vehicle can obtain a high speed.

[0041] The first clutch 41 is closed, the second clutch 42 is opened, the brake 5 brakes the ring gear 33, and the output power of the engine and the motor is coupled and output through the planet carrier 32 to achieve torque coupling.

[0042] In this embodiment, when the first clutch 41 is closed and the second clutch 42 is opened, the brake 5 brakes the ring gear 33, and the output power of the engine is transmitted to the planetary carrier 32; the output power of the motor passes through the sun gear 31, the sun gear 31 is meshed with the planetary gear 34, the ring gear 33 is stationary, and the output power of the motor is transmitted to the planetary carrier 32. The two power sources are coupled and output through the planetary carrier 32, and finally transmitted to the output shaft 6 through the first clutch 41. The output shaft 6 is connected to the wheels on both sides through the differential 7, thereby driving the vehicle to move, so that the vehicle obtains a large torque.

[0043] The power system provided in this embodiment realizes the switching between speed coupling and torque coupling by controlling the opening and closing of the first clutch 41 and the second clutch 42, which can better meet the driver's driving needs. When the driver needs the vehicle to output high torque at low speed, torque coupling is performed (such as climbing a hill), and when high-speed driving is required, speed coupling can be performed. This has important scientific significance and practical value for the development of automobile technology.

[0044] like Figure 2 As shown, the first connecting component may also be the first gear pair 81 and the first synchronizer 91, and the second connecting component may be the second gear pair 82 and the second synchronizer 92. The first gear pair 81 is disposed between the planet carrier 32 and the output shaft 6, and the second gear pair 82 is disposed between the ring gear 33 and the output shaft 6; the controller can control whether the first synchronizer 91 is combined with the first gear pair 81, and control whether the second synchronizer 92 is combined with the second gear pair 82.

[0045] When the first gear pair 81 is combined with the first synchronizer 91, and the second gear pair 82 and the second synchronizer 92 are not combined, the power is output through the planet carrier 32 to achieve torque coupling; when the second gear pair 82 and the second synchronizer 92 are combined, and the first gear pair 81 and the first synchronizer 91 are not combined, the power is output through the ring gear 33, and the speed coupling can also be achieved. However, the structure of controlling the combination of the synchronizer and the gear pair is more complicated than controlling the opening or closing of the clutch.

[0046] like Figure 3 As shown, the first connecting component may also be the first gear pair 81 and the first synchronizer 91, and the second connecting component is the second clutch 42. The first gear pair 81 is disposed between the planet carrier 32 and the output shaft 6, and the controller controls whether the first synchronizer 91 is engaged with the first gear pair 81, and the second clutch 42 is disposed between the ring gear 33 and the output shaft 6, and the controller controls the opening and closing of the second clutch 42.

[0047] By disengaging the first gear pair 81 from the first synchronizer 91 and closing the second clutch 42, the output power of the two power sources is coupled and output through the ring gear 33, thereby realizing speed coupling; by engaging the first gear pair 81 with the first synchronizer 91 and opening the second clutch 42, the output power of the two power sources is coupled and output through the planetary carrier 32, thereby realizing torque coupling.

[0048] Of course, in other embodiments, the first connecting component can also be the first clutch 41, and the second connecting component can be the second gear pair 82 and the second synchronizer 92. The first clutch 41 is arranged between the planetary carrier 32 and the output shaft 6 to control the transmission connection and disconnection between the planetary carrier 32 and the output shaft 6; the second gear pair 82 is arranged between the ring gear 33 and the output shaft 6, and the controller controls whether the second synchronizer 92 is engaged with the second gear pair 82, and can also realize the switching of speed coupling and torque coupling.

[0049] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A power system, characterized in that: The power system is a single planetary gear power system, comprising a first power source (1), a second power source (2), a planetary gear train (3) and an output shaft (6), wherein the planetary gear train (3) comprises a sun gear (31), planetary gears (34), a planet carrier (32) and a ring gear (33); The first power source (1) is drivingly connected to the planet carrier (32), the second power source (2) is drivingly connected to the sun gear (31), and the planet carrier (32) can be drivingly connected to or disconnected from the output shaft (6); The power system further comprises a brake (5) and a first connecting component, wherein the brake (5) is used to brake or release the ring gear (33), and the first connecting component is capable of connecting and disconnecting the planet carrier (32) and the output shaft (6); The ring gear (33) can be drivingly connected to or disconnected from the output shaft (6); The power system further comprises a second connecting component, wherein the second connecting component is capable of connecting and disconnecting the ring gear (33) and the output shaft (6); When the first connecting component connects the planet carrier (32) to the output shaft (6), the brake (5) brakes the ring gear (33), and the second connecting component separates the ring gear (33) from the output shaft (6), thereby achieving torque coupling; When the second connecting component connects the ring gear (33) to the output shaft (6), the brake (5) releases the brake on the ring gear (33), and the first connecting component separates the planet carrier (32) from the output shaft (6), thereby achieving speed coupling; The power system also includes a drive axle, and the output shaft (6) is connected to the drive axle.

2. The power system according to claim 1, characterized in that: The first connecting component is a first clutch (41); or a first gear pair (81) and a first synchronizer (91).

3. The power system according to claim 1, characterized in that: The second connecting component is a second clutch (42); or a second gear pair (82) and a second synchronizer (92).

4. The power system according to claim 1, characterized in that: The first power source (1) is any one of an engine and a motor.

5. The power system according to claim 1, characterized in that: The second power source (2) is any one of an engine and a motor.

6. The power system according to claim 1, characterized in that: The first power source (1) and the second power source (2) are located on the same side of the planetary gear train (3); or the first power source (1) and the second power source (2) are located on two sides of the planetary gear train (3), respectively.

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