A ten-speed automatic transmission

Abstract

The present application provides a kind of ten-gear automatic transmission, including four planetary gear set structures arranged in turn along the input to output direction;Clutch in torque transfer device connects input and planetary gear train, brake in torque transfer device connects transmission housing and planetary gear train, two combinations in each clutch and each brake are selectively engaged, and ten forward gear ratios and one reverse gear ratio are established between input and output.The beneficial effects of the present application are: using fewer planetary gear sets and combining elements to achieve more gears, small overdrive gear step ratio, more stable gear shifting when driving at high speed;To some extent, reduce the difficulty of transmission control and the corresponding volume;The control of each gear only needs to combine the clutch or brake of the components of two torque transfer devices, and only needs to change a pair of torque transfer components when changing between adjacent gears, and the control is simple;Simple and compact, small volume, mature manufacturing process.

Description

Technical Field

[0001] This invention relates to the field of vehicle transmission technology, and more particularly to a ten-speed automatic transmission. Background Technology

[0002] With the continuous development of the automotive industry, automatic transmissions, as one of the core components of the transmission systems of special vehicles and engineering machinery, play a crucial role in improving driving comfort, reducing fuel consumption, and enhancing fuel economy. Currently, most automatic transmissions on the market are 4 to 9 gears, but these traditional transmissions have some limitations in meeting driving needs.

[0003] First, traditional automatic transmissions have a relatively limited number of gears, which restricts their adaptability to different driving conditions. Fewer gears may cause the engine to operate in an unfavorable RPM range, affecting acceleration performance and fuel economy. Second, with continuous advancements in automotive engineering, the demand for vehicles with higher gear counts is gradually increasing to meet fuel efficiency and low noise requirements during highway cruising. Furthermore, the rise of new energy vehicles, hybrid vehicles, and electric vehicles also places higher demands on multi-gear automatic transmissions. Summary of the Invention

[0004] In view of this, in order to address the problem that the number of gears in current automatic transmissions is relatively limited, thus restricting their adaptability to different driving conditions, embodiments of the present invention provide a ten-speed automatic transmission.

[0005] Embodiments of the present invention provide a ten-speed automatic transmission, including

[0006] Input items;

[0007] Output components;

[0008] A planetary gear set assembly, comprising a first planetary gear set, a second planetary gear set, a third planetary gear set, and a fourth planetary gear set sequentially mounted along the direction from the input member to the output member;

[0009] The first planetary gear set includes a first sun gear, a first planet carrier, first planet gears, and a first ring gear. The first sun gear and the first planet gears are externally meshed for transmission, and the first planet gears and the first ring gears are internally meshed for transmission. The first planet gears are rotatably supported on the first planet carrier.

[0010] The second planetary gear set includes a second sun gear, a second planet carrier, a second planet gear, and a second ring gear. The second sun gear and the second planet gear engage externally for transmission, while the second planet gear and the second ring gear engage internally for transmission. The second planet gear is rotatably supported on the second planet carrier.

[0011] The third planetary gear set includes a third sun gear, a third planet carrier, a third planet gear, and a third ring gear. The third sun gear and the third planet gear engage externally for transmission, while the third planet gear and the third ring gear engage internally for transmission. The third planet gear is rotatably supported on the third planet carrier.

[0012] The fourth planetary gear set includes a fourth sun gear, a fourth planet carrier, a fourth planet gear, and a fourth ring gear. The fourth sun gear and the fourth planet gear are externally meshed for transmission, and the fourth planet gear and the fourth ring gear are internally meshed for transmission. The fourth planet gear is rotatably supported on the fourth planet carrier.

[0013] The input component is fixedly connected to the first sun gear, the second ring gear is fixedly connected to the third planet carrier, the third ring gear is fixedly connected to the second planet carrier and the fourth sun gear, the third sun gear is fixedly connected to the fourth ring gear, and the fourth planet carrier is connected to the output component.

[0014] And a torque transmission device, comprising:

[0015] A first clutch connects the second gear ring to the input element;

[0016] The second clutch connects the fourth gear ring to the input element;

[0017] The third clutch connects the first planetary carrier to the second gear ring;

[0018] The fourth clutch connects the first planetary carrier to the second planetary carrier;

[0019] The fifth clutch connects the first planetary carrier to the second sun gear;

[0020] A first brake, which is connected to the fourth sun gear;

[0021] The first clutch, second clutch, third clutch, fourth clutch, fifth clutch and first brake are selectively engaged to establish ten forward gear ratios and one reverse gear ratio between the input and output components.

[0022] Furthermore,

[0023] By engaging the third clutch and the fourth clutch, a gear ratio is established between the input and the output components;

[0024] By engaging the third clutch and the first brake, a second gear ratio is established between the input and the output components;

[0025] By engaging the third clutch and the second clutch, a three-speed gear ratio is established between the input and the output components;

[0026] By engaging the first brake and the second clutch, a four-speed gear ratio is established between the input and the output.

[0027] By engaging the second clutch and the fourth clutch, a five-speed gear ratio is established between the input and the output.

[0028] By engaging the second clutch and the fifth clutch, a six-speed gear ratio is established between the input and the output.

[0029] By engaging the second clutch and the first clutch, a seven-speed gear ratio is established between the input and the output.

[0030] By engaging the fifth clutch and the first clutch, an eight-speed gear ratio is established between the input and the output.

[0031] By engaging the fourth clutch and the first clutch, a nine-speed gear ratio is established between the input and the output.

[0032] By engaging the first clutch and the first brake, a ten-speed gear ratio is established between the input and the output.

[0033] By engaging the first brake and the fifth clutch, a reverse gear ratio is established between the input and the output.

[0034] Furthermore, it also includes a transmission housing, the planetary gear set and the torque transmission device are disposed inside the transmission housing, and the input component and the output component are respectively disposed at both ends of the transmission housing.

[0035] Furthermore, the input component is an input shaft, and the output component is an output shaft.

[0036] Furthermore, the first brake is fixedly connected to the transmission housing.

[0037] Furthermore, the first clutch, the second clutch, the third clutch, the fourth clutch, and the fifth clutch are multi-plate wet clutches.

[0038] Furthermore, the first clutch, the second clutch, the third clutch, the fourth clutch, and the fifth clutch are dog clutches.

[0039] Furthermore, the first brake is a drum brake.

[0040] Furthermore, the first brake is a multi-plate wet brake.

[0041] The beneficial effects of the technical solutions provided by the embodiments of the present invention are as follows:

[0042] 1. A ten-speed automatic transmission of the present invention comprises four planetary gear sets arranged sequentially along the direction from the input component to the output component; a clutch in the torque transmission device connects the input component and the planetary gear train, and a brake in the torque transmission device connects the transmission housing and the planetary gear train. Two combinations of each clutch and each brake are selectively engaged, establishing ten forward gear ratios and one reverse gear ratio between the input shaft and the output component 2. The transmission ratios of each gear are 3.85, 1.78, 1.41, 1.34, 1.23, 1.11, 1.0, 0.81, 0.54, 0.46, and -4.89, respectively. More gears are achieved using fewer planetary gear sets and engagement elements, the overdrive step ratio is small, and gear shifting is more stable at high speeds.

[0043] 2. The present invention provides a ten-speed automatic transmission with fewer torque transmission components, employing five torque transmission components, which reduces the difficulty of transmission control and the corresponding size to a certain extent.

[0044] 3. The present invention provides a ten-speed automatic transmission in which the control of each gear only requires the engagement or disengagement of two torque transmission components, namely clutch or brake, and the shift between adjacent gears only requires the engagement or disengagement of a pair of torque transmission components, making the control simple.

[0045] 4. The present invention provides a ten-speed automatic transmission that uses a single planetary gear set for transmission. The four planetary gear sets have a simple and compact structure, small size, and mature manufacturing process. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the structure of a ten-speed automatic transmission according to the present invention;

[0047] Figure 2 This is a diagram showing the speed ratio step and engagement state of the engagement element of a ten-speed automatic transmission according to the present invention.

[0048] In the diagram: 1. Input component; 2. Output component; 0. Transmission housing; 11. First ring gear; 12. First planetary gear; 13. First planetary carrier; 14. First sun gear; 21. Second ring gear; 22. Second planetary gear; 23. Second planetary carrier; 24. Second sun gear; 31. Third ring gear; 32. Third planetary gear; 33. Third planetary carrier; 34. Third sun gear; 41. Fourth ring gear; 42. Fourth planetary gear; 43. Fourth planetary carrier; 44. Fourth sun gear; C1. First clutch; C2. Second clutch; C3. Third clutch; C4. Fourth clutch; C5. Fifth clutch; B1. First brake. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described below with reference to the accompanying drawings. The following description presents a preferred embodiment of the various possible embodiments of the present invention, intended to provide a basic understanding of the invention, but not intended to identify key or decisive elements of the invention or to limit the scope of protection sought.

[0050] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0051] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0052] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures. Also, it should be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale.

[0053] In the description of this invention, it should be noted that the circuits, electronic components and modules involved in this invention are all prior art, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this invention does not involve improvements to the internal structure and method.

[0054] It should be further noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0055] Please refer to Figure 1 The present invention provides a ten-speed automatic transmission, which is applied to automobiles, special vehicles, construction machinery, etc. It mainly includes a transmission housing 0 and an input component 1, an output component 2, a planetary gear set and a torque transmission device installed inside the transmission housing 0.

[0056] The planetary gear set includes a first planetary gear set, a second planetary gear set, a third planetary gear set, and a fourth planetary gear set installed sequentially from front to back. Each planetary gear set consists of a sun gear, a planet carrier, planet gears, and a ring gear. The torque transmission device includes a first clutch C1, a second clutch C2, a third clutch C3, a fourth clutch C4, a fifth clutch C5, and a first brake B1. The first brake B1 is fixedly connected to the transmission housing O.

[0057] The first planetary gear set consists of a first sun gear 14, a first planet carrier 13, a first planet gear 12, and a first ring gear 11. The first sun gear 14 and the first planet gear 12 are externally meshed for transmission, and the first planet gear 12 and the first ring gear 11 are internally meshed for transmission. The first planet gear 12 is rotatably supported on the first planet carrier 13.

[0058] The second planetary gear set consists of a second sun gear 24, a second planet carrier 23, a second planet gear 22, and a second ring gear 21. The second sun gear 24 and the second planet gear 22 are externally meshed for transmission, while the second planet gear 22 and the second ring gear 21 are internally meshed for transmission. The second planet gear 22 is rotatably supported on the second planet carrier 23.

[0059] The third planetary gear set is composed of a third sun gear 34, a third planet carrier 33, a third planet gear 32, and a third ring gear 31. The third sun gear 34 and the third planet gear 32 are externally meshed for transmission, and the third planet gear 32 and the third ring gear 31 are internally meshed for transmission. The third planet gear 32 is rotatably supported on the third planet carrier 33.

[0060] The fourth planetary gear set is composed of a fourth sun gear 44, a fourth planet carrier 43, a fourth planet gear 42, and a fourth ring gear 41. The fourth sun gear 44 and the fourth planet gear 42 are externally meshed for transmission, and the fourth planet gear 42 and the fourth ring gear 41 are internally meshed for transmission. The fourth planet gear 42 is rotatably supported on the fourth planet carrier 43.

[0061] The first gear ring 11 is fixedly connected to the transmission housing 0, the first sun gear 14 is fixedly connected to the input component 1, the second gear ring 21 is fixedly connected to the third sun gear 34, the third gear ring 31 is fixedly connected to the second planet carrier 23 and the fourth sun gear 44 respectively, and the third sun gear 34 is fixedly connected to the fourth gear ring 41.

[0062] The torque transmission device includes:

[0063] The first clutch C1 connects the second gear ring 21 to the input element 1;

[0064] The second clutch C2 connects the fourth gear ring 41 to the input element 1;

[0065] The third clutch C3 connects the first planetary carrier 13 to the second gear ring 21;

[0066] The fourth clutch C4 connects the first planetary carrier 13 to the second planetary carrier 23;

[0067] The fifth clutch C5 connects the first planet carrier 13 to the second sun gear 24;

[0068] The first brake B1 is connected to the fourth sun gear 44, and the transmission housing 0 is connected to the fourth sun gear 44 through the first brake B1;

[0069] The first clutch C1, the second clutch C2, the third clutch C3, the fourth clutch C4, the fifth clutch C5, and the first brake B1 selectively engage to establish ten forward gear ratios and one reverse gear ratio between the input element 1 and the output element 2, including six reduction gears, one direct drive, and three overdrive gears. Please refer to [reference needed]. Figure 2 The specific implementation process is as follows:

[0070] By engaging the third clutch C3 and the fourth clutch C4, a first gear ratio is established between the input component 1 and the output component 2. Specifically, the third clutch C3 is engaged so that the first planetary carrier 13 and the second ring gear 31 rotate together. The fourth clutch C4 is engaged so that the first planetary carrier 13 and the second planetary carrier 23 rotate together. Thus, a first gear ratio of 3.85 is established between the input component 1 and the output component 2.

[0071] By engaging the third clutch C3 and the first brake B1, a second gear ratio is established between the input component 1 and the output component 2. Specifically, the third clutch C3 is engaged so that the first planetary carrier 13 and the second ring gear 31 rotate together. The first brake B1 is engaged so that the fourth sun gear 44 is connected to the transmission housing 0, preventing the fourth sun gear 44 from rotating relative to the transmission housing 0. Thus, a second gear ratio of 1.78 is established between the input component 1 and the output component 2, with a gear ratio step of 2.16.

[0072] By engaging the third clutch C3 and the second clutch C2, a three-speed gear ratio is established between the input component 1 and the output component 2. Specifically, the third clutch C3 is engaged so that the first planetary carrier 13 and the second ring gear 31 rotate together. The second clutch C2 is engaged so that the fourth ring gear 41 rotates together with the input component 1. Thus, a three-speed gear ratio of 1.41 is established between the input component 1 and the output component 2, with a speed ratio step of 1.26.

[0073] By engaging the first brake B1 and the second clutch C2, a fourth gear ratio is established between the input member 1 and the output member 2. Specifically, the first brake B1 is engaged to connect the fourth sun gear 44 to the transmission housing 3, preventing the fourth sun gear 44 from rotating relative to the transmission housing 0. The second clutch C2 is engaged to allow the fourth ring gear 41 to rotate together with the input member 1. Thus, a fourth gear ratio of 1.35 is established between the input member 1 and the output member 2, with a gear ratio step of 1.04.

[0074] By engaging the second clutch C2 and the fourth clutch C4, a five-speed gear ratio is established between the input component 1 and the output component 2. Specifically, the second clutch C2 is engaged so that the fourth ring gear 41 rotates together with the input component 1. The fourth clutch C4 is engaged so that the second planetary carrier 23 rotates together with the first planetary carrier 13. Thus, a five-speed gear ratio of 1.24 is established between the input component 1 and the output component 2, with a speed ratio step of 1.09.

[0075] By engaging the second clutch C2 and the fifth clutch C5, a six-speed gear ratio is established between the input component 1 and the output component 2. Specifically, the second clutch C2 is engaged so that the fourth ring gear 41 rotates together with the input component 1. The fifth clutch C5 is engaged so that the first planet carrier 13 rotates together with the second sun gear 24. Thus, a six-speed gear ratio of 1.11 is established between the input component 1 and the output component 2, with a speed ratio step of 1.12.

[0076] By engaging the first clutch C1 and the second clutch C2, a seven-speed gear ratio is established between the input component 1 and the output component 2. Specifically, the first clutch C1 is engaged so that the second gear ring 21 rotates together with the input component 1. The second clutch C2 is engaged so that the fourth gear ring 41 rotates together with the input component 1. Thus, a seven-speed gear ratio of 1.0 is established between the input component 1 and the output component 2, with a speed ratio step of 1.11.

[0077] By engaging the fifth clutch C5 and the first clutch C1, an eight-speed gear ratio is established between the input component 1 and the output component 2. Specifically, the fifth clutch C5 is engaged so that the first planetary carrier 13 and the second sun gear 24 rotate together. The first clutch C1 is engaged so that the second ring gear 21 rotates together with the input component 1. Thus, an eight-speed gear ratio of 0.81 is established between the input component 1 and the output component 2, with a speed ratio step of 1.37.

[0078] By engaging the fourth clutch C4 and the first clutch C1, a nine-speed gear ratio is established between the input component 1 and the output component 2. Specifically, the fourth clutch C4 is engaged so that the second planetary carrier 23 and the first planetary carrier 13 rotate together. The first clutch C1 is engaged so that the second ring gear 21 rotates together with the input component 1. Thus, a nine-speed gear ratio of 0.54 is established between the input component 1 and the output component 2, with a speed ratio step of 1.50.

[0079] By engaging the first clutch C1 and the first brake B1, a ten-speed gear ratio is established between the input member 1 and the output member 2. Specifically, the first clutch C1 is engaged so that the second ring gear 21 rotates together with the input member 1. The first brake B1 is engaged so that the fourth sun gear 44 is connected to the transmission housing 0, preventing the fourth sun gear 44 from rotating relative to the transmission housing 0. Thus, a ten-speed gear ratio of 0.46 is established between the input member 1 and the output member 2, with a speed ratio step of 1.17.

[0080] By engaging the first brake B1 and the fifth clutch C5, a reverse gear ratio is established between the input member 1 and the output member 2. Specifically, the fifth clutch C5 is engaged so that the first planetary carrier 13 and the second sun gear 24 rotate together. The first brake B1 is engaged so that the fourth sun gear 44 is connected to the transmission housing 0, preventing the fourth sun gear 44 from rotating relative to the transmission housing 0. Thus, a reverse gear ratio of -4.89 is established between the input member 1 and the output member 2.

[0081] The operation logic table for the first clutch C1, the second clutch C2, the third clutch C3, the fourth clutch C4, the fifth clutch C5, and the first brake B1 is as follows: Figure 2 As shown.

[0082] In this invention, input component 1 is an input shaft, output component 2 is an output shaft, first clutch C1, second clutch C2, third clutch C3, fourth clutch C4, and fifth clutch C5 are multi-plate wet clutches or jaw clutches, and first brake B1 is a drum brake or a multi-plate wet brake.

[0083] In this document, the directional terms such as front, back, top, and bottom are defined based on the position of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that these are relative concepts and can vary depending on different methods of use and placement; the use of these directional terms should not limit the scope of protection claimed in this application.

[0084] Where there is no conflict, the embodiments and features described above can be combined with each other. The above descriptions are merely preferred embodiments of the present invention and are not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A ten-speed automatic transmission, characterized in that, include Input items; Output components; A planetary gear set assembly, comprising a first planetary gear set, a second planetary gear set, a third planetary gear set, and a fourth planetary gear set sequentially mounted along the direction from the input member to the output member; The first planetary gear set includes a first sun gear, a first planet carrier, first planet gears, and a first ring gear. The first sun gear and the first planet gears are externally meshed for transmission, and the first planet gears and the first ring gears are internally meshed for transmission. The first planet gears are rotatably supported on the first planet carrier. The second planetary gear set includes a second sun gear, a second planet carrier, a second planet gear, and a second ring gear. The second sun gear and the second planet gear engage externally for transmission, while the second planet gear and the second ring gear engage internally for transmission. The second planet gear is rotatably supported on the second planet carrier. The third planetary gear set includes a third sun gear, a third planet carrier, a third planet gear, and a third ring gear. The third sun gear and the third planet gear engage externally for transmission, while the third planet gear and the third ring gear engage internally for transmission. The third planet gear is rotatably supported on the third planet carrier. The fourth planetary gear set includes a fourth sun gear, a fourth planet carrier, a fourth planet gear, and a fourth ring gear. The fourth sun gear and the fourth planet gear are externally meshed for transmission, and the fourth planet gear and the fourth ring gear are internally meshed for transmission. The fourth planet gear is rotatably supported on the fourth planet carrier. The input component is fixedly connected to the first sun gear, the second ring gear is fixedly connected to the third planet carrier, the third ring gear is fixedly connected to the second planet carrier and the fourth sun gear respectively, the third sun gear is fixedly connected to the fourth ring gear, and the fourth planet carrier is connected to the output component; And a torque transmission device, comprising: A first clutch connects the second gear ring to the input element; The second clutch connects the fourth gear ring to the input element; The third clutch connects the first planetary carrier to the second gear ring; The fourth clutch connects the first planetary carrier to the second planetary carrier; The fifth clutch connects the first planetary carrier to the second sun gear; A first brake, which is connected to the fourth sun gear; The first clutch, second clutch, third clutch, fourth clutch, fifth clutch and first brake are selectively engaged to establish ten forward gear ratios and one reverse gear ratio between the input and output components.

2. A ten-speed automatic transmission as described in claim 1, characterized in that: By engaging the third clutch and the fourth clutch, a gear ratio is established between the input and the output components; By engaging the third clutch and the first brake, a second gear ratio is established between the input and the output components; By engaging the third clutch and the second clutch, a three-speed gear ratio is established between the input and the output components; By engaging the first brake and the second clutch, a four-speed gear ratio is established between the input and the output. By engaging the second clutch and the fourth clutch, a five-speed gear ratio is established between the input and the output. By engaging the second clutch and the fifth clutch, a six-speed gear ratio is established between the input and the output. By engaging the second clutch and the first clutch, a seven-speed gear ratio is established between the input and the output. By engaging the fifth clutch and the first clutch, an eight-speed gear ratio is established between the input and the output. By engaging the fourth clutch and the first clutch, a nine-speed gear ratio is established between the input and the output. By engaging the first clutch and the first brake, a ten-speed gear ratio is established between the input and the output. By engaging the first brake and the fifth clutch, a reverse gear ratio is established between the input and the output.

3. A ten-speed automatic transmission as described in claim 1, characterized in that: It also includes a transmission housing, the planetary gear set and the torque transmission device are disposed inside the transmission housing, and the input component and the output component are respectively disposed at both ends of the transmission housing.

4. A ten-speed automatic transmission as described in claim 3, characterized in that: The input component is an input shaft, and the output component is an output shaft.

5. A ten-speed automatic transmission as described in claim 3, characterized in that: The first brake is fixedly connected to the transmission housing.

6. A ten-speed automatic transmission as described in claim 1, characterized in that: The first clutch, the second clutch, the third clutch, the fourth clutch, and the fifth clutch are multi-plate wet clutches.

7. A ten-speed automatic transmission as described in claim 1, characterized in that: The first clutch, the second clutch, the third clutch, the fourth clutch, and the fifth clutch are dog clutches.

8. A ten-speed automatic transmission as described in claim 1, characterized in that: The first brake is a drum brake.

9. A ten-speed automatic transmission as described in claim 1, characterized in that: The first brake is a multi-plate wet brake.

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