Power confluence composite shaft system of continuously variable transmission

Abstract

The utility model provides a continuously variable transmission power confluence composite shaft system which comprises a second power input shaft and a third power input shaft which are coaxially connected through a spline to form a mechanical power transmission path. The first power input shaft and the fifth power input shaft are coaxially connected through a spline of the connecting sleeve to form a hydraulic power transmission path; during working, hydraulic flow and mechanical flow transmit power through different shafts, stepless speed change is achieved through convergence of the planet row, input paths can be switched to achieve multi-section speed change, and the input rotating speed of the mechanical flow is changed through gears with different speed ratios. The problem of shafting structure design during multi-power coupling input is solved, the structure is simple, the design is compact, the space utilization rate of the transmission is improved, and the advantages of low cost and high reliability are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of stepless speed change, and relates to a stepless speed change power confluence composite shafting. BACKGROUND

[0002] As an important technology of modern automobile transmission system, continuously variable transmission (CVT) is favored for its unique fuel economy and driving comfort. Compared with traditional step transmission, continuously variable transmission can realize continuous change of transmission ratio, so that the engine always works in the most efficient speed range, greatly reducing fuel consumption and improving the fuel economy of the vehicle. At the same time, due to the smoothness of continuously variable transmission, the vehicle hardly feels the impact of gear shifting during acceleration and deceleration, providing a more quiet and comfortable ride experience for the driver and passengers.

[0003] Among the many ways to realize stepless speed change, it is undoubtedly an extremely important technical approach to realize power confluence output through coupling structure after multiple input power. This design ingeniously allows power from different power sources (such as engine, motor or other power sources in hybrid power system) to be efficiently coupled inside the transmission, and then output to the wheels in an optimized way. This coupling structure not only greatly improves the efficiency of power transmission, but also significantly enhances the power performance and response speed of the vehicle, making the vehicle perform well in various driving conditions.

[0004] However, in order to meet the needs of different driving speeds, continuously variable transmission usually needs to be set with multiple working zones to realize stepless speed change. These working zones are divided according to various factors such as vehicle speed, engine load and driver's intention, and each working zone corresponds to a specific range of transmission ratio change. Although this multi-zone design improves the adaptability and flexibility of the transmission, it also makes the design of the transmission system, especially the shafting structure, extremely complex. The design of multi-zone, multi-power coupling input requires the transmission system to have high integration and coordination. The shafting structure not only needs to withstand the torque and speed changes from different power sources, but also needs to realize smooth transition and switching between multiple working zones. This requires the shafting structure to have sufficient strength and stiffness to ensure stable and reliable performance under extreme conditions such as high speed and high load. At the same time, the design of the shafting structure also needs to consider factors such as transmission efficiency, noise control and vibration suppression, making the design difficulty and implementation cost greatly increased.

[0005] In summary, the implementation of multi-zone, multi-power coupling input in the prior art will result in complex design of the transmission system, especially the shafting structure, and difficult implementation. UTILITY MODEL CONTENT

[0006] In order to solve the problems in the prior art, the utility model provides a continuously variable transmission power confluence composite shaft system, solves the problems of complex structure design and great implementation difficulty of the multi-section and multi-power power confluence continuously variable transmission gearbox shaft system.

[0007] The utility model is realized through the following technical schemes:

[0008] A continuously variable transmission power confluence composite shaft system, comprising,

[0009] The first power input shaft, the second power input shaft, the third power input shaft, the fourth power input shaft and the fifth power input shaft are coaxially connected through the spline,

[0010] The second power input shaft and the third power input shaft are coaxially connected through the spline, forming a mechanical power transmission path,

[0011] The first power input shaft and the fifth power input shaft are coaxially connected through the spline of the connecting sleeve, forming a hydraulic power transmission path,

[0012] The second power input shaft, the third power input shaft and the fourth power input shaft are respectively sleeved on the first power input shaft, the fifth power input shaft and the third power input shaft.

[0013] Preferably, the output end of the fifth power input shaft is provided with a first gear connected with the right side sun gear of the planetary gear set, and the output end of the third power input shaft is provided with a second gear connected with the left side sun gear of the planetary gear set.

[0014] Preferably, the fourth power input shaft is provided with a spline connected with the ring gear of the planetary gear set.

[0015] Preferably, the first power input shaft is supported by the first bearing and the second bearing.

[0016] Preferably, the second power input shaft is supported by the second bearing and the third bearing.

[0017] The inner ring of the second bearing is sleeved on the first power input shaft, and the second power input shaft is sleeved on the outer ring of the second bearing.

[0018] Preferably, the fourth power input shaft is supported by the fourth bearing and the fifth bearing.

[0019] Preferably, the second power input shaft is a hollow shaft and is sleeved on the first power input shaft.

[0020] Preferably, the third power input shaft is a hollow shaft and is sleeved on the fifth power input shaft.

[0021] Preferably, the fourth power input shaft is a hollow shaft, which is sleeved on the third power input shaft.

[0022] Preferably, the second power input shaft and the fourth power input shaft are provided with gears with different speed ratios.

[0023] Compared with the prior art, the power flow composite shaft system has the following beneficial technical effects:

[0024] The utility model provides a kind of continuously variable transmission power flow composite shaft system, including the coaxial connection of second power input shaft and third power input shaft by spline, forming mechanical power transmission path;First power input shaft and fifth power input shaft are coaxially connected by the spline of connecting sleeve, forming hydraulic power transmission path;When working, hydraulic flow and mechanical flow pass through different shafts to transmit power, and realize continuously variable speed by planetary array flow, and also can switch input path to realize multi-section variable speed, and mechanical flow changes input rotation speed by gear with different speed ratios.Solve the problem of shaft system structure design when multiple power coupling input, structure is simple, design is compact, improve the utilization rate of transmission space, with the advantages of low cost and high reliability.The multi-shaft nested composite shaft system of the utility model can realize multiple power coupling input and realize continuously variable speed of transmission;Multi-shaft nested composite shaft system can realize multi-section continuously variable speed, meet the speed range requirement;And multi-shaft nested composite shaft system has the advantage of compact structure while realizing function, which is beneficial to reducing the volume of transmission.

[0025] Further, the composite shaft system proposed in the utility model realizes input of no more than three kinds of power into one composite shaft system by three-shaft nesting, and the output position can be connected to coupling structure to realize power flow, thereby realizing continuously variable speed, and the composite shaft system uses bearing and other structures to support each hollow shaft and ensure the relative movement between each shaft. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a kind of continuously variable transmission power flow composite shaft system structure schematic diagram;

[0027] Figure 2 It is a kind of composite shaft system output position schematic diagram;

[0028] In the drawing: first bearing 1, first power input shaft 2, second bearing 3, second power input shaft 4, connecting sleeve 5, third bearing 6, fourth bearing 7, third power input shaft 8, fourth power input shaft 9, fifth bearing 10, fifth power input shaft 11, spline 12, first gear 14, second gear 15. DETAILED DESCRIPTION

[0029] The utility model will be further explained in detail in combination with specific embodiment, and it is the explanation of the utility model but not limitation.

[0030] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0031] In view of the problems of complex design and difficult implementation of the shafting structure of the multi-section, multi-power power confluence continuously variable transmission, the present application provides a continuously variable transmission power confluence composite shafting which is composed of a three-shaft nested shafting. The composite shafting can input no more than three powers into the composite shafting, and the output position can be connected with a coupling structure to realize power confluence, thereby realizing continuously variable transmission. The design is ingenious, has the advantages of compact structure, and is beneficial to reducing the volume of the transmission.

[0032] As shown in Figure 1 , Figure 2 , the present embodiment provides a continuously variable transmission power confluence composite shafting which can be used in a mechanical-hydraulic power split continuously variable transmission. The continuously variable transmission power confluence composite shafting comprises a first power input shaft 2, a second power input shaft 4, a third power input shaft 8, a fourth power input shaft 9, and a fifth power input shaft 11. The second power input shaft 4 is connected with the third power input shaft 8 through a spline. The first power input shaft 2 and the fifth power input shaft 11 are connected through a spline on the connecting sleeve 5. The second power input shaft 4 is a hollow shaft which is sleeved on the first power input shaft 2. The third power input shaft 8 is a hollow shaft which is sleeved on the fifth power input shaft 11. The fourth power input shaft 9 is a hollow shaft which is sleeved on the third power input shaft 8. The first power input shaft 2 is supported by the first bearing 1 and the second bearing 3. The second power input shaft 4 is supported by the second bearing 3 and the third bearing 6. The inner ring of the second bearing 3 is sleeved on one end of the first power input shaft 2, and one end of the second power input shaft 4 is sleeved on the outer ring of the second bearing 3, that is, the second bearing 3 supports the first power input shaft 2 and the second power input shaft 4 at the same time. The fourth power input shaft 9 is supported by the fourth bearing 7 and the fifth bearing 10. The first bearing 1 and the second bearing 3 are respectively sleeved on both ends of the first power input shaft 2. The third bearing 6 is sleeved on the other end of the second power input shaft 4.

[0033] The fourth bearing 7 and the fifth bearing 10 are respectively sleeved on both ends of the fourth power input shaft 9.

[0034] The output end of the fifth power input shaft 11 is provided with a first gear 14 which is connected with a sun gear on the right side of a planetary gear set. The output end of the third power input shaft 8 is provided with a second gear 15 which is connected with a sun gear on the left side of the planetary gear set.

[0035] The fourth power input shaft 9 is provided with a spline 12 connected with a planet gear ring;

[0036] The power flow composite shaft of the continuously variable transmission can transmit the power on the first power input shaft 2, the second power input shaft 4 and the fourth power input shaft 9 to the first gear 14 and the second gear 15 on the right side of the shaft system and the spline 12, which can be used as the input of the coupled structure planet gear row to realize power flow and continuously variable transmission.

[0037] The second power input shaft 4 and the fourth power input shaft 9 are respectively provided with gear sets with different speed ratios to adjust the input rotating speed of mechanical power flow.

[0038] The connecting sleeve 5 is a sleeve structure with internal splines at both ends, which is engaged with the external splines of the first power input shaft 2 and the fifth power input shaft 11.

[0039] The third bearing 6 and the fourth bearing 7 are radial bearings, which support the axial middle sections of the second power input shaft 4 and the fourth power input shaft 9 respectively.

[0040] The fifth power input shaft 11 and the first gear 14 are integrally formed or connected through spline / interference fit.

[0041] When the mechanical hydraulic power split continuously variable transmission works, the hydraulic flow power is transmitted to the spline sleeve 5 and the fifth power input shaft 11 through the gears on the first power input shaft 2, and the first gear 14 on the right side of the fifth power input shaft 11 can be used as the right side sun gear of the double planet gear row; the mechanical flow power is transmitted to the third power input shaft 8 through the gears on the second power input shaft 4, and the second gear 15 on the right side of the third power input shaft 8 can be used as the left side sun gear of the double planet gear row, or the mechanical flow power is transmitted to the fourth power input shaft 9 through the gears on the fourth power input shaft 9, and the spline 12 on the fourth power input shaft 9 can be connected with the gear ring of the planet gear row; the power flow is realized through the planet gear row to achieve continuously variable transmission; in actual work, the mechanical flow can be transmitted through the second gear 15 and the spline 12 alternately to realize multi-section continuously variable transmission. At the same time, the mechanical flow can be transmitted through the gears with different speed ratios on the second power input shaft 4 and the fourth power input shaft 9 to change the input rotating speed of the mechanical flow.

[0042] The application of the utility model on the mechanical hydraulic power split continuously variable transmission can realize the power flow of the mechanical flow and the hydraulic flow, and the alternative input of the mechanical flow, and further realize the multi-section mechanical hydraulic power split continuously variable transmission, which can significantly improve the power transmission performance, fuel economy and comfort of the vehicle, and the mechanical structure is simple and compact, which is conducive to improving the space utilization rate of the transmission.

[0043] In the description of the utility model, it is necessary to understand that the orientation or positional relation indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relation based on the orientation or positional relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model indicated or implied by the device or element, which must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0044] It should be noted that the terms "first", "second", and the like in the description and claims of the utility model and the above drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a particular order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0045] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. When the assembly is referred to as "fixed to" another assembly, it can be directly on another assembly or there can be a middle assembly. When a component is considered to be "connected" to another component, it can be directly connected to another component or a middle component can exist at the same time. When a component is considered to be "set on" another component, it can be directly set on another component or a middle component can exist at the same time.

[0046] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include the first and second features directly contact, or can include the first and second features are not directly contact but contact through another feature between them. Moreover, the first feature is "on", "above" and "on the surface" of the second feature includes the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than the second feature. The first feature is "under", "below" and "under" the second feature includes the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is less than the second feature.

[0047] It should be understood that when used in the present specification and the appended claims, the terms "comprise" and "contain" indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein only for the purpose of describing specific embodiments of the present application, and is not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0049] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in any form; any person skilled in the art can easily implement the present application according to the drawings and the above description; however, any person skilled in the art can make some changes, modifications and equivalent changes of the above disclosed technical content without departing from the scope of the technical scheme of the present application; at the same time, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present application are still within the protection scope of the technical scheme of the present application.

Claims

1. A continuously variable transmission power merging compound shaft train, characterized by, Comprising, a first power input shaft (2), a second power input shaft (4), a third power input shaft (8), a fourth power input shaft (9), a fifth power input shaft (11); the second power input shaft (4) and the third power input shaft (8) are coaxially connected through the spline, forming a mechanical power transmission path; the first power input shaft (2) and the fifth power input shaft (11) are coaxially connected through the spline of the connecting sleeve (5), forming a hydraulic power transmission path; the second power input shaft (4), the third power input shaft (8), and the fourth power input shaft (9) are respectively sleeved on the first power input shaft (2), the fifth power input shaft (11), and the third power input shaft (8).

2. A continuously variable transmission power combining compound shafting according to claim 1, characterised in that, the output end of the fifth power input shaft (11) is provided with a first gear (14) connected with the right sun gear of the planetary gear set, and the output end of the third power input shaft (8) is provided with a second gear (15) connected with the left sun gear of the planetary gear set.

3. A continuously variable transmission power-combined shaft train according to claim 1, wherein, the fourth power input shaft (9) is provided with a spline (12) connected with the ring gear of the planetary gear set.

4. A continuously variable transmission power combining compound shafting according to claim 1, wherein, the first power input shaft (2) is supported by the first bearing (1) and the second bearing (3).

5. A continuously variable transmission power merging composite shaft arrangement according to claim 4, characterized in that the second power input shaft (4) is supported by the second bearing (3) and the third bearing (6); the inner ring of the second bearing (3) is sleeved on the first power input shaft (2), and the second power input shaft (4) is sleeved on the outer ring of the second bearing (3).

6. A continuously variable transmission power merging composite shaft assembly according to claim 1, wherein, the fourth power input shaft (9) is supported by the fourth bearing (7) and the fifth bearing (10).

7. A continuously variable transmission power merging composite shaft system according to claim 1, wherein the second power input shaft (4) is a hollow shaft, which is sleeved on the first power input shaft (2).

8. A continuously variable transmission power merging composite shaft system according to claim 1, wherein the third power input shaft (8) is a hollow shaft, which is sleeved on the fifth power input shaft (11).

9. A continuously variable transmission power merging composite shaft system according to claim 1, wherein the fourth power input shaft (9) is a hollow shaft, which is sleeved on the third power input shaft (8).

10. A continuously variable transmission power combining compound shaft train according to claim 1 wherein, different gear ratios are provided on the second power input shaft (4) and the fourth power input shaft (9).

Images