Continuously variable transmission integrated drive system and vehicle

Abstract

This application relates to the field of vehicle technology, and in particular to a continuously variable transmission (CVT) integrated drive system and a vehicle. The CVT integrated drive system includes a first motor, a second motor, a planetary assembly, a superstructure pump assembly, and an output shaft. The planetary assembly includes a sun gear, a ring gear, and a planet carrier, with the planet carrier located between the sun gear and the ring gear. The planet carrier is connected to the output shaft. The first motor is driveably connected to the superstructure pump assembly and is also driveably connected to the output shaft, or the first motor is connected to or disconnected from the output shaft via a power switching assembly. The second motor is driveably connected to the output shaft. The first motor outputs power to maintain the rotational speed of the superstructure pump assembly within a first range and the rotational speed of the sun gear within a second range. The second motor outputs power to change the rotational speed of the ring gear, thereby changing the rotational speed of the output shaft. This allows for the simultaneous fulfillment of the different rotational speed requirements of the superstructure pump assembly and the vehicle's travel assembly, with interconnected power transmission paths, achieving transmission coupling.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a continuously variable transmission (CVT) integrated drive system and vehicle. Background Technology

[0002] Because the speed requirements of the superstructure drive motor and the travel drive motor differ, the vehicle's superstructure drive motor and travel drive system are two independent systems, each controlled separately. The two power systems are essentially uncoupled, or physically integrated but unable to be coupled. While this solves their respective power requirements, the total power output suffers from system over-matching, preventing full utilization of the system's capabilities. The travel system and pump drive system are arranged separately, lacking a unified hardware structure. Even if integrated, the transmission paths are unrelated and cannot achieve continuously variable transmission, only fixed-gear power transmission. This results in complex layouts and high costs.

[0003] Therefore, in view of the above situation, there is a need to provide a continuously variable transmission (CVT) integrated drive system and vehicle to at least partially solve the existing problems. Summary of the Invention

[0004] The summary of this application introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] This application provides a continuously variable transmission (CVT) integrated drive system, which includes a first motor, a second motor, a planetary assembly, a superstructure pump assembly, and an output shaft. The planetary assembly includes a sun gear, a ring gear, and a planet carrier, with the planet carrier located between the sun gear and the ring gear. The planet carrier is connected to the output shaft.

[0006] The first motor is driven to the upper pump assembly, and the first motor is also driven to the output shaft, or the first motor is connected to or disconnected from the output shaft through a power switching assembly. The sun gear is disposed in the first power transmission path between the first motor and the output shaft. The second motor is connected to the output shaft via a drive, and the gear ring is disposed in the second power transmission path between the second motor and the output shaft. Specifically, the first motor outputs power to adjust the speed of the upper pump assembly to a first speed and the speed of the sun gear to a second speed, while the second motor outputs power to change the speed of the gear ring, thereby changing the speed of the output shaft.

[0007] According to the continuously variable transmission (CVT) integrated drive system of this application, the CVT integrated drive system includes a first motor, a second motor, a planetary assembly, an upper-mounted pump assembly, and an output shaft. The planetary assembly includes a sun gear, a ring gear, and a planet carrier. The planet carrier is located between the sun gear and the ring gear and is connected to the output shaft. The first motor is driven by the upper-mounted pump assembly and is also driven by the output shaft, or the first motor is connected to or disconnected from the output shaft through a power switching assembly. The sun gear is located in a first power transmission path between the first motor and the output shaft. The second motor is driven by the output shaft, and the ring gear is located in a second power transmission path between the second motor and the output shaft. The first motor outputs power to adjust the speed of the upper-mounted pump assembly to a first speed and the speed of the sun gear to a second speed. The second motor outputs power to change the speed of the ring gear, thereby changing the speed of the output shaft. In this way, the continuously variable transmission integrated drive system can meet both the needs of the superstructure pump assembly and the vehicle's movement. It can simultaneously satisfy the different speed requirements of the superstructure pump assembly and the movement assembly. The power of the first motor flows into the superstructure pump assembly and the sun gear respectively, maintaining a stable output power. The transmission ratio between the superstructure pump assembly and the sun gear is fixed, and the speeds of the superstructure pump assembly and the sun gear change proportionally. The power output of the second motor is sent to the planetary carrier so that the speed of the output shaft can match the changing speed requirements of the vehicle. In terms of hardware, it achieves an integrated structure, with interconnected power transmission paths, enabling transmission coupling, simple layout, and low cost.

[0008] Optionally, the continuously variable transmission integrated drive system further includes a power switching component, which is disposed between the first motor and the planetary assembly on the first power transmission path.

[0009] Optionally, the power switching component is used to connect the first motor to the sun gear or disconnect the first motor from the sun gear; When the power switching component disconnects the first motor from the sun gear, the power of the first motor is only transmitted to the upper pump assembly; When the power switching assembly connects the first motor and the sun gear, the power of the first motor is transmitted to the superstructure pump assembly and the sun gear, respectively.

[0010] Optionally, when the power switching component disconnects the first motor from the sun gear, the sun gear is fixedly connected to the planet carrier and the ring gear, and the power of the second motor is transmitted to the output shaft; When the power switching component connects the first motor and the sun gear, the power of the first motor is transmitted to the planet carrier through the sun gear, and the power of the second motor is transmitted to the planet carrier through the ring gear. The power of the first power transmission path and the power of the second power transmission path are coupled at the planet carrier, so that both the first motor and the second motor drive the output shaft to rotate, thereby achieving stepless transmission.

[0011] Optionally, the gear ring includes internal teeth and external teeth, the internal teeth being connected to the sun gear and the external teeth being connected to the second motor. The first motor outputs power to adjust the speed of the sun gear from zero to the second speed, and the second motor reverses to adjust the speed of the external gear from zero to the third speed, so that the speed of the output shaft is zero and the vehicle is stationary.

[0012] Optionally, the line connecting the second rotational speed, the zero rotational speed of the planetary carrier, and the third rotational speed together forms the neutral speed line.

[0013] Optionally, the first motor outputs power to maintain the rotational speed of the sun gear at a second speed, and the second motor outputs power to reduce the rotational speed of the external gear from a third speed to zero speed, so that the output shaft rotates and the vehicle moves forward.

[0014] Optionally, after the external gear reaches zero speed, the second motor rotates forward to adjust the speed of the external gear from zero speed to a fourth speed, thereby increasing the speed of the output shaft.

[0015] Optionally, the line connecting the second speed and the fourth speed together forms the maximum speed line for the forward gear.

[0016] Optionally, the first motor outputs power to maintain the rotational speed of the sun gear at a second rotational speed, and the second motor outputs power to increase the rotational speed of the external gear from a third rotational speed to a fifth rotational speed, so that the output shaft rotates and the vehicle reverses.

[0017] Optionally, the line connecting the second speed and the fifth speed together forms the highest reverse speed line.

[0018] This application also provides a vehicle that includes the aforementioned continuously variable transmission (CVT) integrated drive system.

[0019] According to this application, the vehicle includes the aforementioned continuously variable transmission (CVT) integrated drive system. The CVT integrated drive system includes a first motor, a second motor, a planetary assembly, a superstructure pump assembly, and an output shaft. The planetary assembly includes a sun gear, a ring gear, and a planet carrier. The planet carrier is located between the sun gear and the ring gear and is connected to the output shaft. The first motor is driven by the superstructure pump assembly and is also driven by the output shaft, or the first motor is connected to or disconnected from the output shaft via a power switching assembly. The sun gear is located in a first power transmission path between the first motor and the output shaft. The second motor is driven by the output shaft, and the ring gear is located in a second power transmission path between the second motor and the output shaft. The first motor outputs power to adjust the rotational speed of the superstructure pump assembly to a first rotational speed and to adjust the rotational speed of the sun gear to a second rotational speed. The second motor outputs power to change the rotational speed of the ring gear, thereby changing the rotational speed of the output shaft. In this way, the continuously variable transmission integrated drive system can meet the needs of the superstructure pump assembly and the vehicle's movement. It can simultaneously meet the different speed requirements of the superstructure pump assembly and the walking assembly. The first motor maintains a stable output power, and the power output of the second motor is adjusted to regulate the vehicle's walking speed and state. It achieves an integrated structure in terms of hardware, with related power transmission paths, enabling transmission coupling. It is simple to arrange and has low cost. Attached Figure Description

[0020] The following figures are included as part of this application for understanding the application. The figures illustrate embodiments of the application and their descriptions, explaining the apparatus and principles of the application. In the figures, Figure 1 A schematic diagram of a continuously variable transmission integrated drive system according to a preferred embodiment provided in this application; Figure 2 for Figure 1 The diagram shows a simplified layout of a continuously variable transmission (CVT) integrated drive system, with the power switching component located on the right. Figure 3 for Figure 1 The diagram shows a simplified layout of a continuously variable transmission (CVT) integrated drive system, with the power switching component located on the left. Figure 4 A schematic diagram of a continuously variable integrated drive system according to another preferred embodiment provided in this application; Figure 5 A speed collinearity diagram for the continuously variable integrated drive system provided in this application; Figure 6 Another speed collinearity diagram for the continuously variable integrated drive system provided in this application.

[0021] Explanation of reference numerals in the attached figures: 1: Continuously variable transmission (CVT) integrated drive system; 11: First motor; 111: First input shaft; 112: First drive gear; 113: Upper reduction gear; 114: First driven gear; 115: Pump shaft; 12: Second motor; 121: Second input shaft; 122: Second drive gear; 13: Planetary components; 131: Sun gear; 132: Ring gear; 133: Planet carrier; 134: Planet gear; 14: Upper pump assembly; 141: Working oil pump; 142: Lubricating oil pump; 15: Output shaft; 151: Front output flange; 152: Rear output flange; 16: Power switching component; 17: Braking components. Detailed Implementation

[0022] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0023] To fully understand this application, detailed portions will be set forth in the following description in order to illustrate it. Obviously, implementation of this application is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this application are described in detail below; however, other embodiments may exist besides these detailed descriptions, and should not be construed as being limited to the embodiments set forth herein.

[0024] It should be understood that the terminology used herein is intended only to describe particular embodiments and is not intended to limit the scope of this application. The singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. The terms “upper,” “lower,” “front,” “rear,” “left,” “right,” and similar expressions used in this application are for illustrative purposes only and are not intended to be limiting.

[0025] The ordinal numbers such as "first" and "second" used in this application are merely identifiers and have no other meaning, such as a specific order. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] The specific embodiments of this application will be described in more detail below with reference to the accompanying drawings, which illustrate representative embodiments of this application and are not intended to limit this application.

[0027] like Figures 1 to 3 As shown, this application provides a continuously variable transmission (CVT) integrated drive system 1. The CVT integrated drive system 1 can drive the upper structure pump assembly 14 and the traveling assembly, simultaneously meeting the different speed requirements of the upper structure pump assembly 14 and the traveling assembly. It achieves an integrated hardware structure with interconnected power transmission paths, enabling transmission coupling. It is simple to arrange and low in cost. The CVT integrated drive system 1 can be used in vehicles, such as electric loaders. It can also drive the pump. Of course, the CVT integrated drive system 1 can also be used in tractors.

[0028] The continuously variable transmission (CVT) integrated drive system 1 includes a first motor 11 and a second motor 12, both of which are capable of outputting power. The first motor 11 and the second motor 12 can be located on opposite sides of the vehicle. The first motor 11 includes a first input shaft 111, which is rotatable, thereby outputting power. The second motor 12 includes a second input shaft 121, which is rotatable, thereby outputting power. The axial direction of the first input shaft 111 is parallel to the axial direction of the second input shaft 121. Preferably, the axial direction of the first input shaft 111 is parallel to the length direction of the vehicle. The axial direction of the second input shaft 121 is parallel to the length direction of the vehicle. The first motor 11 and the second motor 12 are located on opposite sides of the vehicle.

[0029] The continuously variable transmission (CVT) integrated drive system 1 also includes a superstructure pump assembly 14, which is mounted on the chassis beam for specialized operations. For example, the superstructure pump assembly 14 may be used for a hydraulic drive. The vehicle can be configured as a loader. The superstructure pump assembly 14 and the first motor 11 may be located on the same side of the vehicle. The superstructure pump assembly 14 includes a working oil pump 141, which hydraulically drives the bucket at the front end. The superstructure pump assembly 14 may also include a lubricating oil pump 142, which pressurizes engine oil and delivers it to various parts of the engine requiring lubrication.

[0030] The continuously variable transmission (CVT) integrated drive system 1 also includes an output shaft 15 for outputting power. The axial direction of the output shaft 15 is parallel to the axial direction of the first input shaft 111. The axial direction of the output shaft 15 is also parallel to the axial direction of the second input shaft 121. The CVT integrated drive system 1 includes an output shaft 15 for outputting power to multiple wheels. For example, the output shaft 15 is connected to multiple wheels. The vehicle includes a front output flange 151 and a rear output flange 152, which are located at opposite ends of the output shaft 15. The front output flange 151 is fixedly connected to one end of the output shaft 15 along its length. The rear output flange 152 is fixedly connected to the other end of the output shaft 15 along its length. The CVT integrated drive system 1 also includes a braking assembly 17 connected to the rear output flange 152. The braking assembly 17 can be configured as a brake caliper. The braking assembly 17 is used to brake the rotation of the rear output flange 152 to achieve parking.

[0031] The continuously variable transmission (CVT) integrated drive system 1 also includes a planetary assembly 13, which is located between the first motor 11 and the output shaft 15, and also between the output shaft 15 of the second motor 12. The planetary assembly 13 is positioned upstream of the output shaft 15. The planetary assembly 13 is used to transmit the power output from the first motor 11 to the output shaft 15. The planetary assembly 13 is also used to transmit the power output from the second motor 12 to the output shaft 15. Both the first motor 11 and the second motor 12 are connected to the output shaft 15 via the same planetary assembly 13. The respective power of the first motor 11 and the second motor 12 is transmitted to the output shaft 15 via the same planetary assembly 13.

[0032] In the embodiments of this application, the power of the first motor 11 is divided into two paths, which are transmitted to the upper pump assembly 14 and to the output shaft 15 via the planetary assembly 13, respectively. The power of the first motor 11 can meet the operation of the upper pump assembly 14 and also match the power requirements of the output shaft 15. The power of the second motor 12 can be transmitted to the output shaft 15 via the planetary assembly 13. The planetary assembly 13 can receive the different power from the first motor 11 and the second motor 12, and balance the different power from the first motor 11 and the second motor 12, ultimately outputting the power required for vehicle operation. In particular, the planetary assembly 13 can receive the different speeds of the first motor 11 and the second motor 12, and balance the different speeds of the first motor 11 and the second motor 12, ultimately outputting the speed required for vehicle operation to the output shaft 15.

[0033] Specifically, the planetary assembly 13 includes a sun gear 131, a ring gear 132, and a planet carrier 133. The sun gear 131 is connected to the first motor 11, and the ring gear 132 is connected to the second motor 12. The sun gear 131 and the ring gear 132 are spaced apart. The sun gear 131 is spaced apart from the ring gear 132 along its radial direction. The planet carrier 133 is located between the sun gear 131 and the ring gear 132. The planet carrier 133 is connected to the output shaft 15. Rotation of the planet carrier 133 can drive the output shaft 15 to rotate.

[0034] The axial direction of the sun gear 131 is parallel to the axial direction of the ring gear 132. The sun gear 131 is loosely fitted on the output shaft 15. The axial direction of the sun gear 131 is parallel to the axial direction of the output shaft 15. Planet gears 134 are mounted on the planet carrier 133. The axial direction of the planet gears 134 is parallel to the axial direction of the sun gear 131. The axial direction of the planet gears 134 is parallel to the axial direction of the ring gear 132. The planet gears 134 are located between the sun gear 131 and the ring gear 132. The planet gears 134 are located radially between the sun gear 131 and the ring gear 132. The planet gears 134 mesh with the sun gear 131. The planet gears 134 also mesh with the ring gear 132.

[0035] The first motor 11 is connected to the upper pump assembly 14 via a drive mechanism. The first motor 11 outputs power to the upper pump assembly 14 via direct drive. The first motor 11 is directly coupled to the upper pump assembly 14. The operation of the first motor 11 can directly drive the upper pump assembly 14. There is no power switching component between the first motor 11 and the upper pump assembly 14. The power output by the first motor 11 is directly transmitted to the upper pump assembly 14. Starting the first motor 11 will drive the upper pump assembly 14 to operate.

[0036] The continuously variable transmission (CVT) integrated drive system 1 also includes a first drive gear 112, which is fixedly connected to a first input shaft 111. Rotation of the first input shaft 111 drives the first drive gear 112 to rotate. The first input shaft 111 and the first drive gear 112 are centrally connected. The axial direction of the first input shaft 111 is parallel to the axial direction of the first drive gear 112. The first drive gear 112 is located in the upper power transmission path between the first motor 11 and the upper pump assembly 14. The first drive gear 112 can transmit the power output from the first motor 11 to the upper pump assembly 14.

[0037] The continuously variable transmission (CVT) integrated drive system 1 also includes an upper reduction gear 113, which is fixedly connected to the upper pump assembly 14. Both the lubricating oil pump 142 and the working oil pump 141 are connected to the upper reduction gear 113. The upper reduction gear 113 is located in the upper power transmission path between the first motor 11 and the upper pump assembly 14. The upper reduction gear 113 meshes with the first drive gear 112. Rotation of the first drive gear 112 drives the upper reduction gear 113 to rotate. The upper reduction gear 113 can transmit the power output from the first motor 11 to the upper pump assembly 14.

[0038] Furthermore, the continuously variable transmission (CVT) integrated drive system 1 also includes a pump shaft 115, which connects the lubricating oil pump 142 and the working oil pump 141. The pump shaft 115 is located in the upper power transmission path between the first motor 11 and the upper pump assembly 14. The pump shaft 115 can transmit the power output from the first motor 11 to the upper pump assembly 14. The axial direction of the pump shaft 115 is parallel to the axial direction of the first input shaft 111. The axial direction of the pump shaft 115 is parallel to the axial direction of the second input shaft 121. The upper reduction gear 113 is fixedly connected to the pump shaft 115. The upper reduction gear 113 simultaneously drives both hydraulic pumps. The pump shaft 115 is centrally connected to the upper reduction gear 113. The axial direction of the upper reduction gear 113 is parallel to the axial direction of the pump shaft 115. Rotation of the upper reduction gear 113 can drive the pump shaft 115 to rotate, thereby driving the lubricating oil pump 142 and the working oil pump 141 to operate. The lubricating oil pump 142 and the working oil pump 141 operate at the same speed. For example, the speed of both the lubricating oil pump 142 and the working oil pump 141 can be 1500 rpm.

[0039] The upper-mount reduction gear 113 can reduce the rotational speed of the first drive gear 112, thereby transmitting the reduced speed to the upper-mount pump assembly. The first drive gear 112 and the upper-mount reduction gear 113 are disposed between the first motor 11 and the upper-mount pump assembly 14. The first drive gear 112 and the upper-mount reduction gear 113 can adjust the output speed and torque of the first motor 11, ensuring that the output speed and torque meet the requirements of the upper-mount pump assembly 14. In an optional embodiment, only the first drive gear 112, the upper-mount reduction gear 113, and the pump shaft 115 are disposed between the first motor 11 and the upper-mount pump assembly 14.

[0040] Combination Figure 5 and Figure 6 As shown, the continuously variable transmission (CVT) integrated drive system 1 can achieve stepless speed regulation. The first motor 11 outputs power to adjust the speed of the upper pump assembly 14 to a first speed n2. The change in the speed of the first motor 11 can continuously change the speed of the upper pump assembly 14. When the first motor 11 starts, the first input shaft 111 rotates. The speed of the first input shaft 111 is transmitted to the upper reduction gear 113 through the first drive gear 112, and then to the upper pump assembly 14. The speed of the first motor 11 is determined by the upper pump reduction ratio. In this embodiment, the "upper pump reduction ratio" refers to the reduction ratio from the first motor 11 to the upper pump assembly 14, that is, the ratio of the input speed of the first motor 11 to the output speed of the pump shaft 115. The upper pump reduction ratio is the ratio between the speed of the first drive gear 112 and the speed of the upper reduction gear 113.

[0041] The output power of the first motor 11 adjusts the speed of the upper pump assembly 14 to a first speed n2. The first motor 11 starts and outputs power. The speed of the first motor 11 is adjusted from zero to a first motor speed n1. The zero speed of the first motor corresponds to the zero speed of the upper pump assembly 14. The first motor speed n1 corresponds to the first speed n2. For example, if the first motor speed n1 is 8000 rpm, the corresponding first speed n2 of the upper pump assembly 14 is 1500 rpm.

[0042] Now return Figure 1 The first motor 11 is also connected to the output shaft 15 via a drive transmission, or the first motor 11 is connected to or disconnected from the output shaft 15 via a power switching assembly 16. A sun gear 131 is disposed in the first power transmission path between the first motor 11 and the output shaft 15. The continuously variable transmission integrated drive system 1 also includes a first driven gear 114, which meshes with a first driving gear 112. Rotation of the first driving gear 112 can drive the first driven gear 114 to rotate.

[0043] The first driven gear 114 can reduce the rotational speed of the first driven gear 112, and then transmit the reduced speed to the output shaft 15. The first driven gear 112 and the first driven gear 114 are arranged between the first motor 11 and the output shaft 15. The first driven gear 112 and the first driven gear 114 can adjust the output speed and torque of the first motor 11, and the output speed and torque meet the requirements of the output shaft 15.

[0044] In one alternative implementation, such as Figure 4 As shown, the first motor 11 is driven by the output shaft 15. The first motor 11 outputs power to the output shaft 15 via direct drive. The first motor 11 is directly coupled to the output shaft 15. The first motor 11 is directly connected to the output shaft 15. The operation of the first motor 11 can directly drive the output shaft 15 to rotate. There is no power switching component between the first motor 11 and the output shaft 15. The power output by the first motor 11 is directly transmitted to the output shaft 15. The sun gear 131 can transmit power in the first power transmission path. The rotation of the first driven gear 114 can drive the sun gear 131 to rotate. The sun gear 131 can transmit the power output by the first motor 11 to the output shaft 15. The first motor 11 can drive the output shaft 15 to move as soon as it starts. The power of the first motor 11 is divided into two paths. One path of the power of the first motor 11 drives the upper pump assembly 14 to move, and the other path of the power of the first motor 11 is coupled to the power of the second motor 12 at the planetary assembly 13.

[0045] In another alternative implementation, such as Figures 1 to 3 As shown, the first motor 11 is connected to or disconnected from the output shaft 15 via the power switching assembly 16. In this embodiment, when the first motor 11 is connected to the output shaft 15 via the power switching assembly 16, the planetary assembly 13 is in a coupled state, and the two power inputs are coupled at the planetary assembly 13. The power of the first motor 11 is divided into two paths. One path of the power of the first motor 11 drives the upper pump assembly 14 to operate, and the other path of the power of the first motor 11 is coupled to the power of the second motor 12 at the planetary assembly 13 via the power switching assembly 16. That is, the power of the first motor 11 can both drive the upper pump assembly 14 to operate and can also couple with the power of the second motor 12 at the planetary assembly 13.

[0046] In this embodiment, "disconnected state" refers to the first motor 11 being disconnected from the output shaft 15. When the first motor 11 is in the disconnected state, it is connected to the upper pump assembly 14 in a fixed transmission state, disconnected from the sun gear 131 in an interrupted state, the first drive driven gear 114 is in an idling state, and the second motor 12 is connected to the output shaft 15. This ensures that even when the power output from the first motor 11 is only provided to the upper pump assembly 14, the continuously variable transmission integrated drive system 1 (second motor 12) still has power to drive the vehicle. Thus, the planetary assembly 13 has only one power input (the power input of the second motor 12) and is not in a coupled state.

[0047] When the first motor 11 is connected to the output shaft 15 via the power switching assembly 16, the power of the first motor 11 can be transmitted to the output shaft 15, and the sun gear 131 transmits power in the first power transmission path. The sun gear 131 is connected to the power switching assembly 16. The rotation of the first driven gear 114 can drive the power switching assembly 16 to rotate, thereby driving the sun gear 131 to rotate. When the first motor 11 is disengaged from the output shaft 15 via the power switching assembly 16, the power of the first motor 11 is only transmitted to the upper pump assembly 14, and is disconnected from the sun gear 131. The first power transmission path is in a disconnected state, the power of the first motor 11 is not transmitted to the sun gear 131, and therefore does not drive the output shaft 15 to rotate.

[0048] Figure 5 and Figure 6 The diagram illustrates the speed collinearity of a continuously variable transmission (CVT) integrated drive system, showing the maximum speed lines for forward, neutral, and reverse gears. The endpoint values ​​of each speed line represent a fixed rotational speed of the sun gear. Different rotational speeds of the ring gear correspond to different speed lines, ultimately resulting in different rotational speeds of the planetary carrier and output shaft. Specifically, different rotational speeds of the ring gear correspond to the maximum speed lines for forward, neutral, and reverse gears, respectively.

[0049] The first motor 11 outputs power to adjust the rotational speed of the sun gear 131 to a second rotational speed n3. The change in the rotational speed of the first motor 11 continuously alters the rotational speed of the sun gear 131. When the first motor 11 starts, the first input shaft 111 rotates. The rotational speed of the first input shaft 111 is transmitted through the first drive gear 112 to the first drive driven gear 114, and then to the output shaft 15. The rotational speed of the first motor 11 is determined by the reduction ratio of the first motor. In this embodiment, the "first motor reduction ratio" refers to the reduction ratio from the first motor 11 to the sun gear 131, that is, the ratio of the input rotational speed of the first motor 11 to the output rotational speed of the sun gear 131. The first motor reduction ratio is the ratio between the rotational speed of the first drive gear 112 and the rotational speed of the first drive driven gear 114.

[0050] The output power of the first motor 11 adjusts the rotational speed of the sun gear 131 to a second rotational speed n3. The first motor 11 starts and outputs power. The rotational speed of the first motor 11 is adjusted from zero to its first motor speed n1. The zero rotational speed of the first motor corresponds to the zero rotational speed of the sun gear 131. The first motor speed n1 corresponds to the second rotational speed n3. For example, if the first motor speed n1 is 8000 rpm, the corresponding second rotational speed n3 of the sun gear 131 is 2500 rpm.

[0051] The first motor 11 can also output power only to the upper pump assembly 14. The first motor 11 outputs a first motor speed n1, which corresponds only to the first speed n2 of the upper pump assembly 14.

[0052] In one implementation, Figure 5 and Figure 6 In the collinear velocity diagram shown, the first motor 11 can also output power to the upper pump assembly 14 and the sun gear 131 respectively. The first motor 11 outputs a first motor speed n1, which corresponds to the first speed n2 of the upper pump assembly 14 and the second speed n3 of the sun gear 131.

[0053] For example, the speed range of the first motor n1 can be 0~8000 rpm, the speed range of the first speed n2 of the superstructure pump assembly 14 is 0~1500 rpm, and the speed range of the second speed n3 of the sun gear 131 is 0~2500 rpm. When the first motor outputs a stable first motor speed n1, the speed of the superstructure pump assembly 14 can be maintained at the first speed n2, and the speed of the sun gear 131 can be maintained at the second speed n3. The second motor 12 outputs power. When the operating range of the superstructure pump assembly 14 is narrow and the speed range of the vehicle is wide, the planetary assembly 13 can couple different input power and can output the power required by the output shaft 15. The first motor 11 outputs the same speed, which can make the speed of the sun gear 131 different from the speed of the superstructure pump assembly 14, or the same. The planetary assembly 13 of the continuously variable transmission integrated drive system 1 of this application can play a differential role to meet the power requirements. The continuously variable transmission integrated drive system 1 of this application includes a planetary assembly 13. When the operating range of the superstructure pump assembly 14 is narrow and the vehicle speed range is wide, the power output of the first motor 11 can meet the needs of both the superstructure pump assembly 14 and the output shaft 15. The planetary assembly 13 adjusts the speed, allowing the power output of the first motor 11 to simultaneously meet two different needs.

[0054] The second motor 12 is connected to the output shaft 15 via a drive mechanism. The second motor 12 directly drives the output shaft 15. The second motor 12 is directly coupled to the output shaft 15. The operation of the second motor 12 directly drives the output shaft 15. No power switching component is provided between the second motor 12 and the output shaft 15. The power output by the second motor 12 is directly transmitted to the output shaft 15. The second motor 12 can drive the output shaft 15 to rotate simply by starting it.

[0055] Now return Figure 1 The continuously variable transmission (CVT) integrated drive system 1 also includes a second drive gear 122, which is fixedly connected to a second input shaft 121. Rotation of the second input shaft 121 drives the second drive gear 122 to rotate. The second input shaft 121 and the second drive gear 122 are centrally connected. The axial direction of the second input shaft 121 is parallel to the axial direction of the second drive gear 122. The second drive gear 122 is located in the second power transmission path between the second motor 12 and the output shaft 15. The second drive gear 122 can transmit the power output from the second motor 12 to the output shaft 15.

[0056] A gear ring 132 is disposed in the second power transmission path between the second motor 12 and the output shaft 15. The gear ring 132 is connected to the second motor 12. The power of the second motor 12 is transmitted to the output shaft 15 through the gear ring 132. Preferably, the gear ring 132 meshes with the second drive gear 122. Rotation of the second drive gear 122 can drive the gear ring 132 to rotate. The gear ring 132 is connected to the output shaft 15 through a planet carrier 133. Rotation of the gear ring 132 can drive the output shaft 15 to rotate. Further, the gear ring 132 includes internal teeth and external teeth. The internal teeth are connected to the sun gear, and the external teeth are connected to the second motor. The internal teeth are connected to the sun gear 131 through planet gears 134. The internal teeth mesh with the planet gears 134. The planet gears 134 mesh with the sun gear 131. The internal teeth are constructed as part of the gear ring, forming a planetary transmission assembly. The external teeth are connected to the second motor through the second drive gear 122. The external teeth mesh with the second drive gear 122. The second drive gear 122 is connected to the second input shaft. Rotation of the second drive gear 122 drives the external gear to rotate. Rotation of the gear ring 132 drives the planetary gear 134 to rotate, which in turn drives the planet carrier 133 to rotate, and the planet carrier 133 drives the output shaft 15 to rotate. The external gear of the gear ring 132 acts as a speed reducer, and its rotation drives the internal gear to rotate, achieving power coupling and thus realizing stepless speed regulation.

[0057] The second motor 12 outputs power to change the rotational speed of the gear ring 132, which in turn changes the rotational speed of the output shaft 15. The change in the rotational speed of the second motor 12 can continuously alter the rotational speed of the gear ring 132. The second motor 12 outputs power to increase the rotational speed of the gear ring 132, thereby increasing the rotational speed of the output shaft 15. The second motor 12 outputs power to decrease the rotational speed of the gear ring 132, thereby decreasing the rotational speed of the output shaft 15. Specifically, the second motor 12 outputs power to change the rotational speed of the external teeth of the gear ring 132, which in turn changes the rotational speed of the output shaft 15.

[0058] The first motor 11 outputs constant power to ensure the stable operation of the superstructure pump assembly 14, while the second motor 12 outputs varying power to adjust the rotational speed of the output shaft 15. Thus, the continuously variable transmission (CVT) integrated drive system 1 can meet both the needs of the superstructure pump assembly 14 and the vehicle's movement. The power requirements for both vehicle movement and the superstructure pump assembly 14 can originate from the same motor. The power from the first motor 11 can drive both the superstructure pump assembly 14 and the vehicle. In particular, the transmission device of the CVT integrated drive system 1 can transmit power to both the superstructure pump assembly 14 and the wheels.

[0059] According to the continuously variable transmission (CVT) integrated drive system 1 of this application, the CVT integrated drive system 1 includes a first motor 11, a second motor 12, a planetary assembly 13, an upper pump assembly 14, and an output shaft 15. The planetary assembly 13 includes a sun gear 131, a ring gear 132, and a planet carrier 133. The planet carrier 133 is located between the sun gear 131 and the ring gear 132 and is connected to the output shaft 15. The first motor 11 is driven by the upper pump assembly 14. The first motor 11 is also driven by the output shaft 15, or the first motor 11 is connected to the power switching assembly 1. The first motor 11 is connected to or disconnected from the output shaft 15. The sun gear 131 is located in the first power transmission path between the first motor 11 and the output shaft 15. The second motor 12 is connected to the output shaft 15, and the gear ring 132 is located in the second power transmission path between the second motor 12 and the output shaft 15. The first motor 11 outputs power to adjust the speed of the upper pump assembly 14 to the first speed and the speed of the sun gear 131 to the second speed. The second motor 12 outputs power to change the speed of the gear ring 132, thereby changing the speed of the output shaft 15. In this way, the continuously variable transmission integrated drive system 1 can meet the needs of both the upper pump assembly 14 and the vehicle's movement. It can simultaneously meet the different speed requirements of the upper pump assembly 14 and the walking assembly. The first motor 11 maintains a stable output power, and the power output of the second motor 12 is adjusted to regulate the vehicle's speed and state. It achieves an integrated structure in hardware, with interconnected power transmission paths, enabling transmission coupling, simple layout, and low cost.

[0060] exist Figures 1 to 3 In the illustrated embodiment, the continuously variable transmission integrated drive system 1 further includes a power switching component 16, through which the first motor 11 is connected to or disconnected from the output shaft 15. Figure 2 As shown, when the first motor 11 is connected to the output shaft 15 through the power switching component 16, the power of the first motor 11 can be transmitted to the sun gear 131, and the sun gear 131 can then transmit the power output by the first motor 11 to the output shaft 15. The operation of the first motor 11 can drive the output shaft 15 to operate through the power switching component 16.

[0061] A power switching assembly 16 is disposed between a first motor 11 and a planetary assembly 13 on a first power transmission path. The planetary assembly 13 is located on the first power transmission path. Preferably, the sun gear 131 is located on the first power transmission path. The power switching assembly 16 can be moved to different positions to allow power from the first motor 11 to be transmitted to the planetary assembly 13 via the first power transmission path, or to interrupt power transmission in the first power transmission path.

[0062] The power switching assembly 16 includes a movable component, a first tooth, a second tooth, and a third tooth. The movable component is movable. The first tooth is connected to the first motor 11, the second tooth is connected to the sun gear 131, and the third tooth is connected to the output shaft 15. The first tooth is connected to the first driven gear 114. Rotation of the first driven gear 114 can drive the first tooth to rotate.

[0063] The first tooth is loosely fitted outside the output shaft 15. The first tooth is connected to the first driven gear 114. The first driven gear 114 is loosely fitted outside the output shaft 15. The rotation of the first driven gear 114 drives the first tooth to rotate.

[0064] The second tooth is loosely fitted outside the output shaft 15. The power switching assembly 16 also includes a second gear, the second tooth being the external tooth of the second gear. The second gear is loosely fitted outside the output shaft 15. Rotation of the second tooth does not directly drive the output shaft 15 to rotate. The second tooth is connected to the sun gear 131. Rotation of the second tooth can drive the sun gear 131 to rotate.

[0065] The third tooth is connected to the output shaft 15. The power switching assembly 16 also includes a third gear, the third tooth being the external tooth of the third gear. Rotation of the third tooth can drive the output shaft 15 to rotate.

[0066] The power switching assembly 16 is used to connect or disconnect the first motor 11 from the sun gear 131. The moving member is capable of moving between left and right positions. The moving member is capable of moving along the axial direction of the output shaft 15. Figure 3 As shown, the moving member located on the left is connected to both the second and third gears. The first motor 11 and the sun gear 131 are disconnected via the moving member located on the left, and the sun gear 131 is fixed to the planet carrier 133. At this time, the sun gear 131, planet gears 134, and planet carrier 133 are all fixed together. The sun gear 131, planet gears 134, and planet carrier 133 do not participate in the transmission; their speeds are all the same, and they do not rotate relative to each other. The sun gear 131, planet gears 134, and planet carrier 133 do not rotate relative to the ring gear; the entire planetary assembly is a single unit. The sun gear 131, planet gears 134, and planet carrier 133 rotate as a whole with the ring gear. Figure 2 As shown, the right-hand moving member is connected to both the first tooth and the second tooth. The first motor 11 and the sun gear 131 are connected via the right-hand moving member. Rotation of the first tooth can drive the second tooth to rotate via the right-hand moving member, thereby driving the sun gear 131 to rotate.

[0067] like Figure 3As shown, when the power switching assembly 16 disconnects the first motor 11 from the sun gear 131, the power of the first motor 11 is only transmitted to the upper pump assembly 14. The rotational speed of the upper pump assembly 14 is the first rotational speed n2. When the moving member moves to the left position, the power switching assembly 16 disconnects the first motor 11 from the sun gear 131, and the sun gear 131 is fixed together with the planetary carrier 133. When the power switching assembly 16 disconnects the first motor 11 from the sun gear 131, the sun gear 131 and the ring gear 132 are fixed together with the planetary carrier 133. That is, the sun gear 131, the planetary carrier 133, and the ring gear 132 rotate synchronously. The moving member in the left position disconnects the first motor 11 from the sun gear 131, and the sun gear 131 is fixed together with the planetary carrier 133. The sun gear 131 is not connected to the first driven gear 114. All the power of the first motor 11 is transmitted to the upper pump assembly 14. The power of the first motor 11 is sufficient to maintain the rotational speed of the upper pump assembly 14 at a first speed n2. In this way, the first power transmission path is disconnected, while the upper transmission path remains intact. Even if the first motor 11 is disconnected from the output shaft 15, it will not affect the first motor 11's ability to drive the upper pump assembly 14.

[0068] like Figure 2 As shown, when the power switching component 16 connects the first motor 11 and the sun gear 131, the power of the first motor 11 is transmitted to the superstructure pump assembly 14 and the sun gear 131 respectively. When the moving member moves to the right position, the power switching component 16 connects the first motor 11 and the sun gear 131. The moving member in the right position connects the first motor 11 and the sun gear 131. The moving member in the right position is connected to both the first gear and the second gear. The first driven driven gear 114 drives the sun gear 131 to rotate. The power of the first motor 11 is transmitted to the superstructure pump assembly 14 and the sun gear 131 respectively. The first motor 11 can both drive the superstructure pump assembly 14 to move and drive the sun gear 131 to rotate, thereby driving the output shaft 15 to rotate, and thus driving the vehicle to move. The power of the first motor 11 can both adjust the speed of the superstructure pump assembly 14 to the first speed n2 and adjust the speed of the sun gear 131 to the second speed n3. In this way, the first power transmission path is maintained, and the superstructure transmission path is maintained.

[0069] like Figure 3As shown, when the power switching assembly 16 disconnects the first motor 11 from the sun gear 131, the planet carrier 133 and the ring gear 132 are fixedly connected, and the power of the second motor 12 is transmitted to the output shaft 15. When the moving member is in the left position, the power switching assembly 16 disconnects the first motor 11 from the sun gear 131. The moving member in the left position is connected to both the second and third gears. Thus, the first power transmission path is disconnected, and the first driven gear 114 does not drive the sun gear 131 to rotate, and therefore does not drive the output shaft 15 to rotate through the planet carrier 133. The planet carrier 133 is connected to the internal teeth of the ring gear 132 through the planet gears 134. The power output of the second motor 12 can drive the external teeth of the ring gear 132 to rotate. The rotation of the internal teeth of the ring gear 132 can drive the planet carrier 133 to rotate through the planet gears 134. The rotation of the planet carrier 133 drives the output shaft 15 to rotate. Thus, the second motor 12 drives the output shaft 15 to rotate, thereby making the vehicle move.

[0070] like Figure 2 As shown, when the power switching assembly 16 connects the first motor 11 and the sun gear 131, the power of the first motor 11 is transmitted to the planet carrier 133 through the sun gear 131. When the moving member is in the right position, the power switching assembly 16 connects the first motor 11 and the sun gear 131. The first driven gear 114 is connected to the sun gear 131 through the power switching assembly 16. The moving member in the right position is connected to both the first and second gears. Thus, the first power transmission path is connected, and the first driven gear 114 can drive the sun gear 131 to rotate, thereby driving the output shaft 15 to rotate through the planet carrier 133. The power of the second motor 12 is transmitted to the planet carrier 133 through the ring gear 132. The output power of the second motor 12 can drive the ring gear 132 to rotate, thereby driving the planet carrier 133 to rotate through the planet gear 134.

[0071] The first motor 11 outputs power along a first power transmission path to the planetary carrier 133, serving as one input to drive the planetary assembly 13. The second motor 12 outputs power along a second power transmission path to the planetary carrier 133, serving as another power input for speed regulation of the planetary assembly 13. The power from the first and second power transmission paths is coupled at the planetary carrier 133, causing both the first motor 11 and the second motor 12 to drive the output shaft 15 to rotate. This achieves stepless transmission. The power of the upper pump assembly 14 originates from the first motor 11. The power of the output shaft 15 originates from the first motor 11 and the second motor 12. The power of the first motor 11 and the second motor 12 is coupled at the planetary assembly. Specifically, the sun gear 131 meshes with the internal teeth of the planetary carrier 133. The internal teeth of the ring gear 132 mesh with the external teeth of the planetary carrier 133. In this embodiment, the "internal teeth of the planetary carrier 133" refers to the teeth in the region near the sun gear 131 of the planetary gear 134 connected to the planetary carrier 133, and the "external teeth of the planetary carrier 133" refers to the teeth in the region near the gear ring 132 of the planetary gear 134 connected to the planetary carrier 133. The power of the first motor 11 and the power of the second motor 12 can be coupled at the planetary carrier 133. The internal and external teeth of the planetary carrier 133 enable the two sets of power to be coupled, and the coupled power is transmitted to the output shaft 15. Thus, the continuously variable transmission integrated drive system 1 can ensure both the normal needs of the superstructure pump assembly 14 and the normal rotation of the output shaft 15, ensuring the normal movement of the vehicle. Whether the moving component is in the left or right position, the first motor 11 can drive the superstructure pump assembly 14 to move.

[0072] Power transmission path of the upper structure: the first motor 11 rotates → the first drive gear 112 rotates → the upper structure reduction gear 113 rotates → the upper structure pump assembly 14 operates.

[0073] When the moving component is in the right position, the first power transmission path is: first motor 11 rotates → first drive gear 112 rotates → first drive driven gear 114 rotates → power switching component 16 rotates → sun gear 131 rotates → planet gear 134 rotates → planet carrier 133 rotates → output shaft 15 rotates. The second power transmission path is: second motor 12 rotates → second drive gear 122 rotates → ring gear 132 rotates → planet gear 134 rotates → planet carrier 133 rotates → output shaft 15 rotates.

[0074] When the moving component is in the left position, the first motor 11 does not output power to the output shaft 15. The first power transmission path disconnects the connection between the first motor 11 and the output shaft 15. The sun gear 131 engages with the planetary carrier 133. The planetary assembly 13 is integrally fixed and rotates. The continuously variable transmission integrated drive system 1 is driven by the second motor 12 as a single motor. The upper pump assembly 14 is entirely driven by the first motor 11. Thus, power decoupling is achieved. The second power transmission path is: the second motor 12 rotates → the second drive gear 122 rotates → the gear ring 132 rotates → the planetary gear 134 rotates → the planetary carrier 133 rotates → the output shaft 15 rotates.

[0075] like Figure 5 and Figure 6 As shown, both the first motor 11 and the second motor 12 are started and capable of outputting power. Simultaneously, the second motor 12 also outputs power. When the first motor 11 starts, it rotates forward. At the same time, the second motor 12 starts and rotates in reverse.

[0076] The first motor 11 outputs power to rotate the sun gear 131, and the second motor 12 outputs power to rotate the external teeth of the gear ring 132. The first motor 11 adjusts the speed of the sun gear 131 from zero to a second speed n3. Simultaneously, the second motor 12 reverses direction, adjusting the speed of the external teeth from zero to a third speed n4. The relationship between the second speed n3 and the third speed n4 conforms to the lever principle. Figure 5 and Figure 6 In this configuration, the gear ratio between the sun gear 131 and the planet carrier 133 is X, and the gear ratio between the planet carrier 133 and the ring gear 132 is Y, where X:Y = 2.6. The rotational speed of the sun gear 131 and the rotational speed of the external teeth of the ring gear 132 are coupled at the planet carrier 133, resulting in zero rotational speed of the planet carrier 133. This ensures that the output shaft 15 rotates at zero speed, and the vehicle remains stationary.

[0077] The rotational speed of the external teeth of the ring gear 132 corresponds to the rotational speed of the sun gear 131, ensuring that the planet carrier 133 always maintains a zero rotational speed. The second rotational speed n3 and the third rotational speed n4 correspond. For example, if the second rotational speed n3 is 2500 rpm and the third rotational speed n4 is -900 rpm, the planet carrier 133's rotational speed is 0, the output shaft 15's rotational speed is 0, and the vehicle remains stationary. In this embodiment, "-900 rpm" refers to the rotational speed of the external teeth of the ring gear 132 being 900 rpm when the second motor 12 reverses, and "-" indicates that the second motor 12 reverses. Of course, the second rotational speed n3 of the sun gear 131 can also be any value between 0 and 2500 rpm, and the third rotational speed n4 of the external teeth of the ring gear 132 can be any value between 0 and -900 rpm, with the two values ​​corresponding to each other.

[0078] Furthermore, the line connecting the second speed n3, the zero speed of the planetary carrier 133, and the third speed n4 together forms the neutral speed line. The zero speed of the planetary carrier 133 is always on the neutral speed line. The zero speed of the output shaft 15 is always on the neutral speed line. The second speed n3 can be any value between 0 and 2500 rpm, and the third speed n4 can be any value between 0 and -900 rpm. The relationship between the two values ​​conforms to the lever principle, and the line connecting the two values ​​can form the neutral speed line, with the zero speed of the planetary carrier 133 on the neutral speed line after the connection.

[0079] After the vehicle is started, both the first motor 11 and the second motor 12 start. The first motor 11 outputs power to make the speed of the sun gear 131 vary between 0 and 2500 rpm. The second motor 12 reverses and outputs power to make the speed of the external teeth of the ring gear 132 vary between 0 and -900 rpm. The speed of the planet carrier 133 is 0, the speed of the output shaft 15 is 0, and the vehicle does not move and remains stationary.

[0080] After the vehicle comes to a standstill, the first motor 11 outputs power to maintain the rotational speed of the sun gear 131 at the second speed n3. While the sun gear 131 maintains the rotational speed at the second speed n3, the rotational speed of the external gear changes, the rotational speed of the planet carrier 133 is no longer zero, the rotational speed of the output shaft 15 is no longer zero, and the vehicle moves (e.g., forward or backward). The sun gear 131 maintains the rotational speed at the second speed n3, and the power output of the second motor 12 changes, causing the rotational speed of the external gear to change, so that the rotational speed of the external gear is no longer the third speed n4, the rotational speed of the planet carrier 133 is no longer zero, and the output shaft 15 rotates.

[0081] The second motor 12 continues to reverse and reduces power output. The power output of the second motor 12 decelerates the external gear's speed from the third speed n4 to zero. The line connecting the second speed n3 and the external gear's speed is no longer the neutral speed line. The external gear's speed can be any value between the third speed n4 and zero speed. At this time, the absolute value of the external gear's speed is less than the absolute value of the third speed n4. For example, if the third speed n4 is -900 rpm, the external gear's speed is adjusted to -800 rpm, the second speed n3 remains at 2500 rpm, the planetary carrier 133 rotates, the output shaft 15 rotates, and the vehicle moves forward.

[0082] Furthermore, the line connecting the second rotational speed n3 and the rotational speed of the external gear together forms the forward gear speed line. The second rotational speed n3 remains constant, for example, at 2500 rpm or a value between 0 and 2500 rpm. The rotational speed of the external gear is selected from any value between -900 rpm and 0 rpm. The relationship between these two values ​​conforms to the lever principle, and the line connecting them forms the forward gear speed line. At this time, the rotational speed of the planetary carrier 133 is not zero, the rotational speed of the output shaft 15 is not zero, the output shaft 15 rotates, and the vehicle moves forward.

[0083] The second motor 12 reverses direction and reduces power output, gradually decreasing the speed of the external gear to zero. Once the external gear reaches zero speed, the second motor 12 reverses direction. The second motor 12 changes from reverse to forward rotation. That is, after the external gear reaches zero speed, the second motor 12 rotates forward, adjusting the external gear's speed from zero to the fourth speed n5. After the external gear reaches zero speed, the first motor 11 continues to output power, maintaining the sun gear 131's speed at the second speed n3. The second motor 12's forward rotation changes the external gear's speed. The second motor 12's speed is adjusted from zero to the fourth speed n5. The fourth speed n5 is greater than zero speed. The second motor 12 increases its output power, increasing the external gear's speed. The external gear's speed and the sun gear 131's speed are coupled at the planet carrier 133, increasing the planet carrier 133's speed, increasing the output shaft 15's speed, and accelerating the vehicle.

[0084] The first motor 11 outputs power to keep the sun gear 131 rotating at a second speed n3, while the second motor 12 outputs power to change the rotation of the external teeth of the ring gear 132. The forward rotation of the second motor 12 adjusts the speed of the external teeth from zero to a fourth speed n5. The relationship between the second speed n3 and the fourth speed n5 conforms to the lever principle. The speeds of the sun gear 131 and the external teeth of the ring gear 132 are coupled at the planetary carrier 133, causing the speed of the planetary carrier 133 to continue increasing. This allows the output shaft 15 to continue accelerating, propelling the vehicle forward and increasing its speed. For example, if the second speed n3 is 2500 rpm, and based on the first reduction ratio of the second motor, the fourth speed n5 is 3200 rpm. The planetary carrier 133 reaches its maximum speed, the output shaft 15 reaches its maximum speed, and the vehicle reaches its maximum forward speed.

[0085] Furthermore, the line connecting the second speed n3 and the fourth speed n5 forms the maximum speed line for the forward gear. The second speed n3 remains at 2500 rpm, while the fourth speed n5 increases from 0 rpm to 3200 rpm. The maximum speed line for the forward gear is formed at the points of the second speed n3 (0, 2500 rpm) and the fourth speed n5 (0, 3200 rpm). As the vehicle moves forward, the power of the second motor 12 gradually increases, causing the speed of the planetary carrier 133 to increase, the speed of the output shaft 15 to increase, and the vehicle speed to increase.

[0086] After the vehicle comes to a standstill, the first motor 11 outputs power to maintain the rotational speed of the sun gear 131 at the second speed n3. The second motor 12 continues to reverse and increases its power output. The power output of the second motor 12 increases the rotational speed of the external gear from the third speed n4 to the fifth speed n6. The line connecting the second speed n3 and the rotational speed of the external gear is no longer the neutral speed line. The rotational speed of the external gear can be any value between the third speed n4 and the fifth speed n6. The absolute value of the rotational speed of the external gear is greater than the absolute value of the third speed n4. According to the second reduction ratio of the second motor, the fifth speed n6 can be -2700 rpm. For example, if the third speed n4 is -900 rpm, the rotational speed of the external gear is adjusted to -1000 rpm, the second speed n3 is 2500 rpm, the planetary carrier 133 rotates, the output shaft 15 rotates, and the vehicle reverses.

[0087] Furthermore, the line connecting the second rotational speed n3 and the rotational speed of the external gear together forms the reversing speed line. The second rotational speed n3 remains constant, for example, at 2500 rpm or a value between 0 and 2500 rpm. The rotational speed of the external gear is selected from any value between -900 rpm and -2700 rpm. The relationship between these two values ​​conforms to the lever principle, and the line connecting them forms the reversing speed line. At this time, the rotational speed of the planetary carrier 133 is not zero, the rotational speed of the output shaft 15 is not zero, the output shaft 15 rotates, and the vehicle reverses.

[0088] The second motor 12 reverses and increases power output, gradually increasing the speed of the external gear to the fifth speed n6. The increased output power of the second motor 12 further increases the speed of the external gear. The speed of the external gear and the speed of the sun gear 131 are coupled at the planet carrier 133, causing the speed of the planet carrier 133 to increase, the speed of the output shaft 15 to increase, and the vehicle accelerates when reversing.

[0089] The first motor 11 outputs power to keep the sun gear 131 rotating at a second speed, while the second motor 12 outputs power to change the rotation of the external teeth of the ring gear 132. The second motor 12 reverses, adjusting the speed of the external teeth from a third speed n4 to a fifth speed n6. The relationship between the second speed n3 and the fifth speed n6 conforms to the lever principle. The speeds of the sun gear 131 and the external teeth of the ring gear 132 are coupled at the planet carrier 133, whose speed is not zero. This allows the output shaft 15 to rotate, and the vehicle to reverse. For example, if the second speed n3 is 2500 rpm and the fifth speed n6 is -2700 rpm, the planet carrier 133's speed is not zero, the output shaft 15's speed is not zero, and the vehicle reverses.

[0090] Furthermore, the line connecting the second speed n3 and the fifth speed n6 forms the maximum reversing speed line. The second speed n3 is maintained at 2500 rpm, and the fifth speed n6 is adjusted from -900 rpm to -2700 rpm. The maximum reversing speed line is formed through the points of the second speed n3 (0, 2500 rpm) and the fifth speed n6 (0, -2700 rpm). When the vehicle is reversing, the power of the second motor 12 gradually increases, which increases the speed of the planetary carrier 133, the speed of the output shaft 15, and the vehicle speed.

[0091] The continuously variable transmission (CVT) integrated drive system 1 achieves continuous, gearless, and seamless speed regulation through dual-motor electronic control and planetary assembly 13 speed adjustment. This results in a wider and stepless speed range, improved transmission efficiency, and a simplified structure. With the upper pump assembly 14 and sun gear 131 remaining stable, adjusting the speed of the second motor 12 adjusts the speed of the external teeth of the gear ring 132, thus enabling stepless speed regulation of the output shaft 15 for forward drive, parking, starting, acceleration, and reversing.

[0092] The speed of the first motor 11 is stabilized within the optimal operating range, ensuring stable operation of the upper pump assembly 14. Of course, the speed of the first motor 11 can also be adjusted according to the needs of the upper pump assembly 14. The electronic control system, by adjusting the speed of the second motor 12, can continuously change the rotation of the external teeth of the ring gear 132, thereby continuously changing the speed of the planetary carrier 133. One power transmission from the first motor 11 drives the working oil pump 141 and the lubricating oil pump 142. Another power transmission from the first motor 11 drives the sun gear 131 of the planetary assembly 13, and simultaneously, under the combined action of the second motor 12 driving the external teeth of the ring gear 132 of the planetary assembly 13, it continuously regulates the output speed of the planetary carrier 133. The upper pump assembly 14 is coupled with the drive power, ensuring it operates within the optimal speed range. Simultaneously, it also possesses decoupling and single-motor drive switching functions.

[0093] The continuously variable transmission integrated drive system 1 utilizes the transmission principle of multiple degrees of freedom to adjust the speed of the first motor 11 of the pump drive motor so that it is always within the optimal operating speed range of the oil pump, satisfying the function while ensuring that a portion of the power participates in the drive.

[0094] The continuously variable transmission (CVT) integrated drive system 1 integrates hardware, eliminating the transmission gearbox and hydraulic torque converter, and adopting a reduction gearbox transmission to improve transmission efficiency, simplify the transmission and pump drive system, reduce the number of parts, simplify the structure, improve reliability, reduce size, and lower costs. Simultaneously, the CVT integrated drive system 1 also features single-motor switching functionality and decoupling between the superstructure and drive, reducing energy consumption in relocation operations.

[0095] The continuously variable transmission (CVT) integrated drive system 1 integrates the walking drive system and pump drive system in hardware, sharing a single housing and hydraulic circuit, reducing usage and maintenance costs. The first motor 11 serves as the walking and superstructure drive motor. The second motor 12 is the walking speed-regulating motor. The power switching component 16 controls the working position of the moving components, decoupling the first motor 11 and the second motor 12 to achieve both dual-motor and single-motor drive modes. Under heavy loads and complex conditions, the dual motors provide strong power, while under light loads and simple conditions, the single motor operates, saving energy.

[0096] exist Figure 4 In the illustrated embodiment, the first motor 11 outputs power to the output shaft 15 via direct drive. The first motor 11 is drive-connected to the output shaft 15. No power switching component is provided between the first motor 11 and the output shaft 15. The first driven gear 114 is fixedly connected to the sun gear 131. The first driven gear 114 and the sun gear 131 are integrally connected. The first driven gear 114 is located in the first power transmission path between the first motor 11 and the output shaft 15. Both the first motor 11 and the second motor 12 operate. The continuously variable transmission integrated drive system 1 achieves a continuously variable transmission effect with continuous gear ratio, no gears, and no jerking through dual-motor electronic control adjustment.

[0097] The power transmission path of the upper structure is as follows: the first motor 11 rotates → the first drive gear 112 rotates → the upper structure reduction gear 113 rotates → the upper structure pump assembly 14 operates.

[0098] The first power transmission path is as follows: the first motor 11 rotates → the first drive gear 112 rotates → the first drive driven gear 114 rotates → the sun gear 131 rotates → the planet gear 134 rotates → the planet carrier 133 rotates → the output shaft 15 rotates.

[0099] The second power transmission path is as follows: the second motor 12 rotates → the second drive gear 122 rotates → the gear ring 132 rotates → the planetary gear 134 rotates → the planetary carrier 133 rotates → the output shaft 15 rotates.

[0100] Both the first motor 11 and the second motor 12 operate. Neither the first nor the second power transmission path has a power switching component. There is no gear shifting action like in a traditional gearbox throughout the power transmission process. The electronic control system adjusts the speeds of the first motor 11 and the second motor 12 to ensure a continuous and smooth change in the transmission ratio, without any gear steps, achieving "stepless transmission".

[0101] The first motor 11 outputs a constant speed, while the speed of the second motor 12 is adjusted in coordination with the speed of the first motor 11. Increasing the speed of the second motor 12 achieves acceleration, with continuous power transmission without interruption or impact. Decreasing the speed of the second motor 12 achieves deceleration, with continuous power transmission without interruption or impact. Maintaining constant speeds for both the first and second motors achieves cruising, with continuous power transmission without interruption or impact. The upper-body pump assembly 14 always operates within its optimal operating range, unaffected by vehicle speed.

[0102] This application also provides a vehicle that includes the aforementioned continuously variable transmission integrated drive system 1.

[0103] According to this application, the vehicle includes the aforementioned continuously variable transmission (CVT) integrated drive system 1. The CVT integrated drive system 1 includes a first motor 11, a second motor 12, a planetary assembly 13, an upper-mount pump assembly 14, and an output shaft 15. The planetary assembly 13 includes a sun gear 131, a ring gear 132, and a planet carrier 133. The planet carrier 133 is located between the sun gear 131 and the ring gear 132 and is connected to the output shaft 15. The first motor 11 is drive-connected to the upper-mount pump assembly 14 and is also drive-connected to the output shaft 15, or the first motor 11 is connected to the output shaft 15 via a power cutter. The switching component 16 is connected to or disconnected from the output shaft 15. The sun gear 131 is located in the first power transmission path between the first motor 11 and the output shaft 15. The second motor 12 is connected to the output shaft 15, and the gear ring 132 is located in the second power transmission path between the second motor 12 and the output shaft 15. The first motor 11 outputs power to maintain the rotational speed of the upper pump assembly 14 within a first range and the rotational speed of the sun gear 131 within a second range. The second motor 12 outputs power to change the rotational speed of the gear ring 132, thereby changing the rotational speed of the output shaft 15. In this way, the continuously variable transmission integrated drive system 1 can meet both the needs of the upper pump assembly 14 and the vehicle's movement, simultaneously satisfying the different rotational speed requirements of the upper pump assembly 14 and the vehicle's movement. The first motor 11 maintains a stable output power, while the power output of the second motor 12 is adjusted to regulate the vehicle's speed and status. This achieves an integrated structure in hardware, with interconnected power transmission paths, enabling transmission coupling, simple layout, and low cost.

[0104] The continuously variable transmission (CVT) integrated drive system 1 can be used in vehicles, such as electric loaders. It can also drive a pump. Furthermore, it can be used in tractors.

[0105] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Terms such as “part” or “component” appearing herein can refer to a single part or a combination of multiple parts. Terms such as “installation” or “installation” appearing herein can refer to one component being directly attached to another component or one component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0106] This application has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Furthermore, those skilled in the art will understand that this application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed in this application. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A continuously variable transmission (CVT) integrated drive system, characterized in that, The continuously variable transmission (CVT) integrated drive system includes a first motor, a second motor, a planetary assembly, a superstructure pump assembly, and an output shaft. The planetary assembly includes a sun gear, a ring gear, and a planet carrier. The planet carrier is located between the sun gear and the ring gear and is connected to the output shaft. The first motor is driven to the upper pump assembly, and the first motor is also driven to the output shaft, or the first motor is connected to or disconnected from the output shaft through a power switching assembly. The sun gear is disposed in the first power transmission path between the first motor and the output shaft. The second motor is connected to the output shaft via a drive, and the gear ring is disposed in the second power transmission path between the second motor and the output shaft. Specifically, the first motor outputs power to adjust the speed of the upper pump assembly to a first speed and the speed of the sun gear to a second speed, while the second motor outputs power to change the speed of the gear ring, thereby changing the speed of the output shaft.

2. The continuously variable transmission integrated drive system according to claim 1, characterized in that, The continuously variable transmission integrated drive system further includes a power switching component, which is disposed between the first motor and the planetary assembly on the first power transmission path.

3. The continuously variable transmission integrated drive system according to claim 2, characterized in that, The power switching component is used to connect the first motor to the sun gear or disconnect the first motor from the sun gear; When the power switching component disconnects the first motor from the sun gear, the power of the first motor is only transmitted to the upper pump assembly; When the power switching assembly connects the first motor and the sun gear, the power of the first motor is transmitted to the superstructure pump assembly and the sun gear, respectively.

4. The continuously variable transmission integrated drive system according to claim 3, characterized in that, When the power switching component disconnects the first motor from the sun gear, the sun gear is fixedly connected to the planet carrier and the ring gear, and the power of the second motor is transmitted to the output shaft; When the power switching component connects the first motor and the sun gear, the power of the first motor is transmitted to the planet carrier through the sun gear, and the power of the second motor is transmitted to the planet carrier through the ring gear. The power of the first power transmission path and the power of the second power transmission path are coupled at the planet carrier, so that both the first motor and the second motor drive the output shaft to rotate, thereby achieving stepless transmission.

5. The continuously variable transmission integrated drive system according to claim 1, characterized in that, The gear ring includes internal teeth and external teeth, the internal teeth being connected to the sun gear, and the external teeth being connected to the second motor. The first motor outputs power to adjust the speed of the sun gear from zero to the second speed, and the second motor reverses to adjust the speed of the external gear from zero to the third speed, so that the speed of the output shaft is zero and the vehicle is stationary.

6. The continuously variable transmission integrated drive system according to claim 5, characterized in that, The line connecting the second rotational speed, the zero rotational speed of the planetary carrier, and the third rotational speed together forms the neutral speed line.

7. The continuously variable transmission integrated drive system according to claim 5, characterized in that, The first motor outputs power to maintain the rotational speed of the sun gear at a second speed, and the second motor outputs power to reduce the rotational speed of the external gear from a third speed to zero speed, so that the output shaft rotates and the vehicle moves forward.

8. The continuously variable transmission integrated drive system according to claim 7, characterized in that, After the external gear reaches zero speed, the second motor rotates forward to adjust the speed of the external gear from zero speed to the fourth speed, and the speed of the output shaft increases.

9. The continuously variable transmission integrated drive system according to claim 8, characterized in that, The line connecting the second speed and the fourth speed together forms the maximum speed line for the forward gear.

10. The continuously variable transmission integrated drive system according to claim 5, characterized in that, The first motor outputs power to maintain the rotational speed of the sun gear at a second speed, and the second motor outputs power to increase the rotational speed of the external gear from a third speed to a fifth speed, so that the output shaft rotates and the vehicle reverses.

11. The continuously variable transmission integrated drive system according to claim 10, characterized in that, The line connecting the second speed and the fifth speed together forms the highest reverse speed line.

12. A vehicle, characterized in that, The vehicle includes a continuously variable transmission integrated drive system according to any one of claims 1-11.

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