CN117028518A - Hydraulic-gear-multi-disc compound transmission device - Google Patents

Hydraulic-gear-multi-disc compound transmission device Download PDF

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Publication number
CN117028518A
CN117028518A CN202310933610.6A CN202310933610A CN117028518A CN 117028518 A CN117028518 A CN 117028518A CN 202310933610 A CN202310933610 A CN 202310933610A CN 117028518 A CN117028518 A CN 117028518A
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CN
China
Prior art keywords
gear
transmission
disc
clutch
hydraulic
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Pending
Application number
CN202310933610.6A
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Chinese (zh)
Inventor
朱镇
刘佳龙
陈龙
蔡英凤
张勤博
田翔
韩江义
孙晓东
朱建国
吴建民
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Zhejiang University ZJU
Jiangsu University
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Zhejiang University ZJU
Jiangsu University
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Priority to CN202310933610.6A priority Critical patent/CN117028518A/en
Publication of CN117028518A publication Critical patent/CN117028518A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
    • F16H47/02—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
    • F16H47/04—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type the mechanical gearing being of the type with members having orbital motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/04—Smoothing ratio shift

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)

Abstract

The invention provides a hydraulic-gear-multi-disc compound transmission device, which comprises an input member, a power splitting mechanism, a hydraulic transmission mechanism, a gear-multi-disc compound transmission mechanism, a power converging mechanism, an output member, a clutch assembly and a brake assembly, wherein the clutch assembly is arranged on the input member; the clutch assembly connects the power splitting mechanism with the input end of the hydraulic transmission mechanism and the gear-multi-disc composite transmission mechanism respectively; the clutch assembly is used for respectively connecting the output end of the hydraulic transmission mechanism and the gear-multi-disc composite transmission mechanism with the power converging mechanism; the gear-multi-disc compound transmission mechanism comprises 2 parallel transmission paths, wherein a multi-disc continuously variable transmission is arranged in one transmission path; the clutch assembly and the brake assembly provide a continuous gear ratio between the input member and the output member. The invention can realize multi-mode stepless speed change, meet different requirements under different working conditions and has higher fault tolerance rate.

Description

Hydraulic-gear-multi-disc compound transmission device
Technical Field
The invention relates to the field of variable speed transmission devices, in particular to a hydraulic-gear-multi-disc compound transmission device.
Background
The high horsepower tractor is widely used for large-scale and mechanized agricultural production, and can realize high-efficiency operation by matching with advanced agricultural equipment. The speed change system is an important component of a high horsepower tractor and has a great influence on the working efficiency of the high horsepower tractor.
The currently used transmission technologies are mainly gear transmission, hydraulic transmission and hydraulic-gear compound transmission. Gear transmission has higher transmission efficiency, but stepless speed change cannot be realized; the hydraulic transmission torque is large, stepless speed change can be realized, but the transmission efficiency is low, and the hydraulic transmission is not suitable for long-time operation; the hydraulic-gear compound transmission has both high torque of hydraulic transmission and high efficiency of gear transmission, but has higher requirements on a variable pump, a quantitative motor and a hydraulic system.
The prior art has the defects of more single-flow transmission modes, fewer gears and modes, difficulty in meeting various requirements on a speed change system under different working conditions and smaller application range.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a hydraulic-gear-multi-disc composite transmission device, which realizes the switching of multiple modes of hydraulic transmission, gear transmission, multi-disc transmission, gear-multi-disc composite transmission, hydraulic-gear-multi-disc split transmission, hydraulic-gear confluence transmission and hydraulic-gear-multi-disc confluence transmission by switching clutch assemblies and brake assemblies, and meets the operation requirements of multiple working conditions.
The present invention achieves the above technical object by the following means.
A hydraulic-gear-multi-disc compound transmission device comprises an input member, a power splitting mechanism, a hydraulic transmission mechanism, a gear-multi-disc compound transmission mechanism, a power converging mechanism, an output member, a clutch assembly and a brake assembly; the clutch assembly is used for connecting the power splitting mechanism with the input end of the hydraulic transmission mechanism and the gear-multi-disc composite transmission mechanism respectively; the clutch assembly is used for respectively connecting the output end of the hydraulic transmission mechanism and the gear-multi-disc composite transmission mechanism with the power converging mechanism; the gear-multi-disc compound transmission mechanism comprises 2 parallel transmission paths, wherein a multi-disc continuously variable transmission is arranged in one transmission path; the clutch assembly and brake assembly provide a continuous gear ratio between the input member and the output member.
Further, the power splitting mechanism comprises a power splitting mechanism planet carrier, a power splitting mechanism sun gear and a power splitting mechanism gear ring, wherein the power splitting mechanism planet carrier is connected with an input member, and the power splitting mechanism sun gear is connected with the input end of the hydraulic transmission mechanism;
the gear-multi-disc composite transmission mechanism comprises a gear-multi-disc composite transmission mechanism front planet carrier, a multi-disc continuously variable transmission, a gear-multi-disc composite transmission mechanism front sun gear, a gear-multi-disc composite transmission mechanism front gear ring, a gear-multi-disc composite transmission mechanism rear sun gear, a gear-multi-disc composite transmission mechanism rear planet carrier and a gear-multi-disc composite transmission mechanism output gear pair; the front gear ring of the gear-multi-disc composite transmission mechanism is connected with the rear planet carrier of the gear-multi-disc composite transmission mechanism; the front sun gear of the gear-multi-disc composite transmission mechanism is connected with the rear sun gear of the gear-multi-disc composite transmission mechanism;
the power converging mechanism comprises a power converging mechanism gear ring, a power converging mechanism planet carrier and a power converging mechanism sun gear; the power converging mechanism gear ring is connected with the rear gear ring of the gear-multi-disc compound transmission mechanism; the power converging mechanism sun gear is connected with the output member; the power converging mechanism planet carrier is connected with the output end of the hydraulic transmission mechanism;
the clutch assembly includes a clutch C 1 Clutch C 2 Clutch C 3 Clutch C 4 Clutch C 5 And clutch C 6 The method comprises the steps of carrying out a first treatment on the surface of the The clutch C 1 For selectively connecting the power splitting mechanism planet carrier with the power splitting mechanism sun gear for common rotation; the clutch C 2 For selectively connecting the front planet carrier of the gear-multi-disc compound transmission with the ring gear of the power splitting mechanism for common rotation; the clutch C 3 For selectively connecting the input of the multi-disc continuously variable transmission with the power split mechanism ring gear for common rotation; the clutch C 4 The rear sun gear of the gear-multi-disc composite transmission mechanism is selectively connected with the rear planet carrier of the gear-multi-disc composite transmission mechanism to rotate together; the clutch C 5 For selectively connecting the power combiner planetary carrier with the power combiner sun for common rotation; the clutch C 6 For selectively connecting the hydraulic drive output to the power combiner planet carrier for common rotation;
the brake assembly comprises a brake B 1 Brake B 2 Brake B 3 Brake B 4 And a brake B 5 The method comprises the steps of carrying out a first treatment on the surface of the The brake B 1 For selectively connecting the power splitting mechanism ring gear with the mount; the brake B 2 The power splitting mechanism sun gear is used for selectively connecting the power splitting mechanism sun gear with the fixing piece; the brake B 3 The front sun gear is used for selectively connecting the front sun gear of the gear-multi-disc compound transmission mechanism with the fixing piece; the brake B 4 For selectively converging powerThe mechanism planet carrier is connected with the fixing piece; the brake B 5 For selectively connecting the power combiner gear ring with the fixing member.
Further, by adjusting the displacement ratio of the hydraulic drive mechanism, adjusting the gear ratio of the multiple disc continuously variable transmission, and selectively controlling the engagement of the clutch assembly and the brake assembly, a single flow, compound, split and compound drive mode between the input member and the output member is provided.
Further, the single-flow transmission comprises a hydraulic transmission H, a gear transmission G and a multi-disc transmission B;
by adjusting the displacement ratio of the hydraulic transmission and selectively engaging the clutch C 6 Brake B 1 And a brake B 5 Providing a hydraulic transmission H between an input assembly and an output assembly;
by selectively engaging the clutch C 2 Clutch C 5 Brake B 2 And a brake B 3 Providing a gearing G between the input assembly and the output assembly;
by controlling gear ratio and selectively engaging the clutch C of a multiple disc continuously variable transmission 3 Clutch C 4 Brake B 2 And a brake B 4 A multi-disc drive B between the input assembly and the output assembly is provided.
Further, by controlling the gear ratio of the multiple disc continuously variable transmission and selectively engaging the clutch C 2 Clutch C 3 Clutch C 5 And a brake B 2 A gear-multiple disc compound transmission GB between an input assembly and an output assembly is provided.
Further, by adjusting the displacement ratio of the hydraulic transmission, adjusting the gear ratio of the multiple disc continuously variable transmission, and selectively engaging the clutch C 2 Clutch C 3 Clutch C 5 And clutch C 6 A hydraulic-gear-multi-disc split transmission HGB1 is provided between an input assembly and an output assembly.
Further, the confluence transmission mode includes a hydraulic-gear confluence transmission HG and a hydraulic-gear-multi-plate confluence transmission HGB2;
by adjusting the displacement ratio of the hydraulic transmission and selectively engaging the clutch C 1 Clutch C 2 Clutch C 6 And a brake B 3 Providing a hydraulic-gear confluence transmission HG between an input assembly and an output assembly;
by adjusting the displacement ratio of a hydraulic transmission, adjusting the gear ratio of a multiple disc continuously variable transmission and selectively engaging the clutch C 1 Clutch C 2 Clutch C 3 And clutch C 6 A hydraulic-gear-multi-disc split transmission HGB2 is provided between the input and output assemblies.
Further, stepless speed regulation switching between the hydraulic transmission H, the gear transmission G, the multi-disc transmission B, the gear-multi-disc compound transmission GB and the hydraulic-gear-multi-disc split transmission HGB1 is provided by adjusting the displacement ratio of the hydraulic transmission mechanism, adjusting the transmission ratio of the multi-disc continuously variable transmission and selectively controlling engagement of the clutch and the brake.
Further, stepless speed regulation switching between the hydraulic transmission H, the hydraulic-gear confluence transmission HG and the hydraulic-gear-multi-disc confluence transmission HGB2 is provided by adjusting the displacement ratio of the hydraulic transmission mechanism, adjusting the transmission ratio of the multi-disc continuously variable transmission and selectively controlling the engagement of the clutch and the brake.
The invention has the beneficial effects that:
1. according to the hydraulic-gear-multi-disc composite transmission device, through switching the clutch assembly and the brake assembly, the switching of multiple modes of hydraulic transmission, gear transmission, multi-disc transmission, gear-multi-disc composite transmission, hydraulic-gear-multi-disc split transmission, hydraulic-gear confluence transmission and hydraulic-gear-multi-disc confluence transmission is realized, different requirements of different working conditions are met, and the fault tolerance is high.
2. The hydraulic-gear-multi-disc compound transmission device can realize stepless speed regulation switching among multiple gears, reduce gear shifting impact, enlarge speed ratio regulating range, and meet the requirements of large-range linear and nonlinear stepless speed regulation and fine operation.
3. The hydraulic-gear-multi-disc compound transmission device is provided with the reverse gear, and can meet the requirement of high torque or high speed during reverse gear running.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described, in which the drawings are some embodiments of the invention, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic diagram of a hydraulic-gear-multi-disc compound transmission according to the present invention.
FIG. 2 is a schematic power flow diagram of a hydraulic drive H-range of the present invention.
FIG. 3 is a schematic diagram of the power flow of gear G-stage of the present invention.
FIG. 4 is a schematic diagram of a multi-disk drive B-range power flow of the present invention.
Fig. 5 is a schematic diagram of the power flow of the gear-multi-disc compound transmission GB gear of the present invention.
FIG. 6 is a schematic diagram of the hydraulic-gear-multi-disk split drive HGB1 gear power flow according to the present invention.
FIG. 7 is a schematic diagram of hydraulic-gear confluence transmission HG gear power flow according to the present invention.
FIG. 8 is a schematic diagram of the hydraulic-gear-multi-plate confluence transmission HGB2 gear power flow of the present invention.
Fig. 9 is a graph of output rotation speed and input rotation speed between H gear, G gear, B gear, GB gear, HGB1 gear according to the present invention.
Fig. 10 is a graph of output rotation speed and input rotation speed between H gear, HG gear and HGB2 gear according to the present invention.
In the figure:
1-an input shaft; 2-a power splitting mechanism; 2-1-a power splitting mechanism planet carrier; 2-2-Clutch C 1 The method comprises the steps of carrying out a first treatment on the surface of the 2-3-power splitting mechanism sun gear; 2-4-brake B 1 The method comprises the steps of carrying out a first treatment on the surface of the 2-5-power splitting mechanism gear ring; 3-a hydraulic transmission mechanism; 3-1-brake B 2 The method comprises the steps of carrying out a first treatment on the surface of the 3-2-variable pump; 3-3-hydraulic piping; 3-4-quantifying motor; 3-5-Clutch C 6 The method comprises the steps of carrying out a first treatment on the surface of the 3-6-brake B 4 The method comprises the steps of carrying out a first treatment on the surface of the 4-gear-multi-disc compound transmission mechanism; the 4-1-gear-multi-disc compound transmission mechanism is provided with an input gear pair; 4-2-Clutch C 2 The method comprises the steps of carrying out a first treatment on the surface of the Front planet carrier of 4-3-gear-multi-disc compound transmission mechanism; 4-4-Clutch C 3 The method comprises the steps of carrying out a first treatment on the surface of the 4-5-multiple disc continuously variable transmission; front sun gear of 4-6-gear-multi-disc composite transmission mechanism; 4-7-gear-multi-disc compound transmission mechanism front gear ring; 4-8-brake B 3 The method comprises the steps of carrying out a first treatment on the surface of the A rear gear ring of the 4-9-gear-multi-disc compound transmission mechanism; rear sun gear of 4-10-gear-multi-disc composite transmission mechanism; a rear planet carrier of the 4-11-gear-multi-disc compound transmission mechanism; 4-12-Clutch C 4 The method comprises the steps of carrying out a first treatment on the surface of the 4-13-gear-multi-disc compound transmission mechanism output gear pair; 5-a power combiner; 5-1-a power confluence mechanism gear ring; 5-2-power combiner planetary frame; 5-3-Clutch C 5 The method comprises the steps of carrying out a first treatment on the surface of the 5-4 of a sun gear of a 5-4-power converging mechanism; 5-5-brake B 5 The method comprises the steps of carrying out a first treatment on the surface of the 6-output shaft.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1, the hydraulic-gear-multi-disc compound transmission device of the invention comprises an input shaft 1, a power splitting mechanism 2, a hydraulic transmission mechanism 3, a gear-multi-disc compound transmission mechanism 4, a power converging mechanism 5, an output shaft 6, a clutch assembly and a brake assembly;
the power splitting mechanism 2 comprises a power splitting mechanism planet carrier 2-1, a power splitting mechanism sun gear 2-3 and a power splitting mechanism gear ring 2-5. The power splitting mechanism planet carrier 2-1 is fixedly connected with the input shaft 1; the sun gear 2-3 of the power splitting mechanism is fixedly connected with the input end of the hydraulic transmission mechanism 3; the gear ring 2-5 of the power splitting mechanism is connected with the input gear pair 4-1 of the gear-multi-disc compound transmission device;
the hydraulic transmission mechanism 3 comprises a variable pump 3-2, a hydraulic pipeline 3-3 and a quantitative motor 3-4. The power transmitted by the sun gear 2-3 of the power splitting mechanism is output to the variable pump 3-2, the variable pump 3-2 outputs oil to the quantitative motor 3-4 through the hydraulic pipeline 3-3 to drive the quantitative motor 3-4 to rotate, and the power of the quantitative motor 3-4 is output through the power converging mechanism planet carrier 5-2.
The gear-multi-disc composite transmission mechanism 4 comprises a gear-multi-disc composite transmission mechanism input gear pair 4-1, a gear-multi-disc composite transmission mechanism front planet carrier 4-3, a multi-disc continuously variable transmission 4-5, a gear-multi-disc composite transmission mechanism front sun gear 4-6, a gear-multi-disc composite transmission mechanism front gear ring 4-7, a gear-multi-disc composite transmission mechanism rear gear ring 4-9, a gear-multi-disc composite transmission mechanism rear sun gear 4-10, a gear-multi-disc composite transmission mechanism rear planet carrier 4-11 and a gear-multi-disc composite transmission mechanism output gear pair 4-13. The front planet carrier 4-3 of the gear-multi-disc compound transmission mechanism, the front sun gear 4-6 of the gear-multi-disc compound transmission mechanism and the front gear ring 4-7 of the gear-multi-disc compound transmission mechanism form a front planet gear train of the gear-multi-disc compound transmission mechanism, the rear gear ring 4-9 of the gear-multi-disc compound transmission mechanism, the rear sun gear 4-10 of the gear-multi-disc compound transmission mechanism and the rear planet carrier 4-11 of the gear-multi-disc compound transmission mechanism form a rear planet gear train of the gear-multi-disc compound transmission mechanism, 2 parallel transmission paths are arranged between the rear planet gear train of the gear-multi-disc compound transmission mechanism and the input gear pair 4-1 of the gear-multi-disc compound transmission mechanism, one is the front planet gear train of the gear-multi-disc compound transmission mechanism, and the other is the multi-disc continuously variable transmission 4-5; the front gear ring 4-7 of the gear-multi-disc composite transmission mechanism is fixedly connected with the rear planet carrier 4-11 of the gear-multi-disc composite transmission mechanism; the front sun gear 4-6 of the gear-multi-disc composite transmission mechanism is fixedly connected with the rear sun gear 4-10 of the gear-multi-disc composite transmission mechanism; the rear gear ring 4-9 of the gear-multi-disc composite transmission mechanism is fixedly connected with the power converging mechanism gear ring 5-1 through an output gear pair 4-13 of the gear-multi-disc composite transmission mechanism;
the power converging mechanism 5 comprises a power converging mechanism gear ring 5-1, a power converging mechanism planet carrier 5-2 and a power converging mechanism sun gear 5-4. The power converging mechanism gear ring 5-1 is connected with the gear-multi-disc compound transmission mechanism output gear pair 4-13; the power converging mechanism planet carrier 5-2 is connected with the output end of the hydraulic transmission mechanism 3; the sun gear 5-4 of the power converging mechanism is fixedly connected with the output shaft 6.
The clutch assembly includes a clutch C 1 2-2, clutch C 2 4-2, clutch C 3 4-4, clutch C 4 4-12, clutch C 5 5-3 and Clutch C 6 3-5; the clutch C 1 2-2 for selectively connecting the power splitting mechanism carrier 2-1 for common rotation with the power splitting mechanism sun gear 2-3; by a means ofThe clutch C 2 4-2 is used for selectively connecting the front planet carrier 4-3 of the gear-multi-disc compound transmission mechanism with the gear ring 2-5 of the power splitting mechanism through the input gear pair 4-1 of the gear-multi-disc compound transmission mechanism for common rotation; the clutch C 3 4-4 is used for selectively connecting the input end of the multi-disc continuously variable transmission 4-5 with the gear ring 2-5 of the power splitting mechanism through the input gear pair 4-1 of the gear-multi-disc compound transmission mechanism for common rotation; the clutch C 4 4-12 for selectively connecting the rear sun gear 4-10 of the gear-multi-disc compound transmission mechanism with the rear planet carrier 4-9 of the gear-multi-disc compound transmission mechanism for common rotation; the clutch C 5 5-3 for selectively connecting the power combiner planetary carrier 5-2 with the power combiner sun gear 5-4 for common rotation; the clutch C 6 3-5 for selectively connecting the output of the hydraulic transmission 3 with the power combiner carrier 5-2 for common rotation;
the brake assembly comprises a brake B 1 2-4, brake B 2 3-1, brake B 3 4-8, brake B 4 3-6 and brake B 5 5-5; the brake B 1 2-4 for selectively connecting the power splitting mechanism ring gear 2-5 with the mount; the brake B 2 3-1 for selectively connecting the power splitting mechanism sun gear 2-3 with the fixture; the brake B 3 4-8 is used for selectively connecting the front sun gear 4-6 of the gear-multi-disc compound transmission mechanism with a fixing piece; the brake B 4 3-6 for selectively connecting the power combiner carrier 5-2 with the fixture; the brake B 5 5-5 are used to selectively connect the power combiner gear ring 5-1 with the mount.
By adjusting the displacement ratio of the hydraulic transmission mechanism 3, the gear ratio of the multi-disc continuously variable transmission 4-5 and selectively controlling the engagement of the clutch assembly with the brake assembly, a switching of the modes of the hydraulic transmission H, the gear transmission G, the multi-disc transmission B, the gear-multi-disc compound transmission GB, the hydraulic-gear-multi-disc split transmission HGB1, the hydraulic-gear confluence transmission HG and the hydraulic-gear-multi-disc confluence transmission HGB2 between the input shaft 1 and the output shaft 6 is provided. The engagement elements for each transmission mode are shown in table 1. The method comprises the following steps:
table 1 mode switching element engaged state
Wherein: represents the actuator in the engaged state, n 0 The rotation speed of the output shaft 6; n is n i The rotation speed of an input shaft 1 of the engine; e is the displacement ratio of the hydraulic transmission mechanism; k (k) 1 The characteristic parameters of the planetary gear of the power splitting mechanism are; k (k) 2 The characteristic parameters of the front planetary gear of the gear-multi-disc compound transmission mechanism are as follows; k (k) 3 The characteristic parameters of the rear planetary gear are the characteristic parameters of the gear-multi-disc compound transmission mechanism; k (k) 4 The characteristic parameters of the planetary gears of the power converging mechanism are; i.e s The transmission ratio of the multi-disc type continuously variable transmission is only the transmission ratio, and the actual transmission direction is reverse; i.e 1 Inputting the transmission ratio of a gear pair for a gear-multi-disc compound transmission mechanism; i.e 2 The transmission ratio of the gear pair is output for the gear-multi-disc compound transmission mechanism.
Hydraulic transmission H: as shown in fig. 2, when clutch C is engaged 6 3-5, brake B 1 2-4 and brake B 5 5-5, the power transmitted by the input shaft 1 of the engine is output from the output shaft 6 through the power splitting mechanism planet carrier 2-1, the power splitting mechanism sun gear 2-3, the hydraulic transmission mechanism 3, the power converging mechanism planet carrier 5-2 and the power converging mechanism sun gear 5-4. At this time, the relationship between the input rotation speed and the output rotation speed is:
n o ＝e(1+k 1 )(1+k 4 )n i ；
wherein: n is n 0 The rotation speed of the output shaft 6; n is n i The rotation speed of an input shaft 1 of the engine; e is the displacement ratio of the hydraulic transmission mechanism; k (k) 1 The characteristic parameters of the planetary gear of the power splitting mechanism are; k (k) 4 Is a power converging mechanismPlanetary gear characteristic parameters;
gear transmission G: as shown in fig. 3, when clutch C is engaged 2 4-2, clutch C 5 5-3, brake B 2 3-1 and brake B 3 4-8, at this time, the power converging mechanism 5 is fixedly connected into a whole, the power transmitted by the input shaft 1 of the engine is output from the output shaft 6 through the power splitting mechanism planet carrier 2-1, the power splitting mechanism gear ring 2-5, the gear-multi-disc composite transmission mechanism input gear pair 4-1, the gear-multi-disc composite transmission mechanism front planet carrier 4-3, the gear-multi-disc composite transmission mechanism front gear ring 4-7, the gear-multi-disc composite transmission mechanism rear planet carrier 4-11, the gear-multi-disc composite transmission mechanism rear gear ring 4-9, the gear-multi-disc composite transmission mechanism output gear pair 4-13 and the power converging mechanism 5 which are fixedly connected into a whole. At this time, the relationship between the input rotation speed and the output rotation speed is:
wherein: k (k) 2 The characteristic parameters of the front planetary gear of the gear-multi-disc compound transmission mechanism are as follows; k (k) 3 The characteristic parameters of the rear planetary gear are the characteristic parameters of the gear-multi-disc compound transmission mechanism; i.e 1 Inputting the transmission ratio of a gear pair for a gear-multi-disc compound transmission mechanism; i.e 2 The transmission ratio of the gear pair is output for the gear-multi-disc compound transmission mechanism.
Multi-disc drive B: as shown in fig. 4, when clutch C is engaged 3 4-4, clutch C 4 4-12, brake B 2 3-1 and brake B 4 3-6, front and rear planetary gears of the gear-multi-disc compound transmission mechanism 4 are fixedly connected into a whole, and power transmitted by an input shaft 1 of the engine is output from an output shaft 6 through a power splitting mechanism planet carrier 2-1, a power splitting mechanism gear ring 2-5, a gear-multi-disc compound transmission mechanism input gear pair 4-1, a multi-disc continuously variable transmission 4-5, a gear-multi-disc compound transmission mechanism output gear pair 4-13, a power converging mechanism gear ring 5-1 and a power converging mechanism sun gear 5-4. At this time, the relationship between the input rotation speed and the output rotation speed is:
wherein: i.e s The gear ratio of the multi-disc continuously variable transmission is represented by the gear ratio, and the actual transmission direction is reverse.
Gear-multi-disc composite transmission GB: as shown in fig. 5, when clutch C is engaged 2 4-2, clutch C 3 4-4, clutch C 5 5-3 and brake B 2 3-1, the power convergence mechanism 5 is fixedly connected into a whole, the power transmitted by the input shaft 1 of the engine is converged into two paths through the power splitting mechanism planet carrier 2-1, the power splitting mechanism gear ring 2-5 and the gear-multi-disc compound transmission mechanism input gear pair 4-1, one path is transmitted to the gear-multi-disc compound transmission mechanism front planet carrier 4-3, the other path is further converged into two paths through the multi-disc continuously variable transmission 4-5, one path is transmitted to the gear-multi-disc compound transmission mechanism front sun gear 4-6, the other path is transmitted to the gear-multi-disc compound transmission mechanism rear sun gear 4-10, the power flow transmitted to the gear-multi-disc compound transmission mechanism front sun gear 4-6 is converged into a whole with the power flow transmitted to the gear-multi-disc compound transmission mechanism front planet carrier 4-7, the power flow is output from the gear-multi-disc compound transmission mechanism front gear ring gear 4-7, the power flow is converged into a whole with the power flow transmitted to the gear-multi-disc compound transmission mechanism rear sun gear 4-10, the power flow is converged into a whole from the gear-multi-disc compound transmission mechanism rear planet carrier 4-11, and the power flow is output from the gear-multi-disc compound transmission mechanism rear planet carrier 4-7, and the power flow is fixedly connected into an output shaft through the gear pair 13 from the gear-multi-disc compound transmission mechanism front gear 4-3. At this time, the relationship between the input rotation speed and the output rotation speed is:
hydraulic-gear-multi-disc split drive HGB1: as shown in fig. 6, when clutch C is engaged 2 4-2, clutch C 3 4-4, clutch C 5 5-3 and Clutch C 6 3-5, the power converging mechanism 5 is fixedly connected into a whole, and the power transmitted by the input shaft 1 of the engine passes through the planet carrier 2-1 of the power splitting mechanismOne path is transmitted to a power confluence mechanism planet carrier 5-2 through a power splitting mechanism sun gear 2-3 and a hydraulic transmission mechanism 3, the other path is divided into two paths after being input into a gear pair 4-1 of a gear-multi-disc composite transmission mechanism, the other path is transmitted to a gear-multi-disc composite transmission mechanism front sun gear 4-6, the other path is transmitted to a gear-multi-disc composite transmission mechanism rear sun gear 4-10, a power flow transmitted to the gear-multi-disc composite transmission mechanism front sun gear 4-6 is integrated with a power flow transmitted to a gear-multi-disc composite transmission mechanism front ring gear 4-7 and output from the gear-multi-disc composite transmission mechanism front ring gear 4-11 through the gear-multi-disc composite transmission mechanism rear planet carrier 4-11, the power flow transmitted to the gear-multi-disc composite transmission mechanism rear sun gear 4-10 is integrated with the power flow transmitted to the gear-multi-disc composite transmission mechanism rear sun gear 4-6, the power flow is integrated with the power flow transmitted to the gear-multi-disc composite transmission mechanism rear sun gear 4-9 through the gear pair 5, and the power flow is transmitted to the power confluence mechanism output shaft 4-5 from the gear pair 5 through the power confluence mechanism front ring gear 4-7. At this time, the relationship between the input rotation speed and the output rotation speed is:
hydraulic-gear confluence transmission HG: as shown in fig. 7, when clutch C is engaged 1 2-2, clutch C 2 4-2, clutch C 6 3-5 and brake B 3 4-8, the power splitting mechanism 5 is fixedly connected into a whole, the power transmitted by the input shaft 1 of the engine is divided into two paths after passing through the planetary frame 2-1 of the power splitting mechanism, one path is transmitted to the planetary frame 5-2 of the power converging mechanism through the sun gear 2-3 of the power splitting mechanism and the hydraulic transmission mechanism 3, and the other path is transmitted to the input gear pair 4-1 of the multi-disc compound transmission mechanism through the gear ring 2-5 of the power splitting mechanism, the front planetary frame 4-3 of the multi-disc compound transmission mechanism, the front gear ring 4-7 of the multi-disc compound transmission mechanism, the rear planetary frame 4-11 of the multi-disc compound transmission mechanism and the rear planetary frame 4-11 of the multi-disc compound transmission mechanismThe gear ring 4-9 and the output gear pair 4-13 of the gear-multi-disc compound transmission mechanism are transmitted to the gear ring 5-1 of the power converging mechanism, are converged into a whole through the power converging mechanism 5, and are output from the output shaft 6 through the sun gear 5-4 of the power converging mechanism. At this time, the relationship between the input rotation speed and the output rotation speed is:
hydraulic-gear-multi-disk confluence drive HGB2: as shown in fig. 8, when clutch C is engaged 1 2-2, clutch C 2 4-2, clutch C 3 4-4 and Clutch C 6 3-5, the power splitting mechanism 2 is fixedly connected into a whole, the power transmitted by the input shaft 1 of the engine is divided into two paths through the planetary frame 2-1 of the power splitting mechanism, one path is transmitted to the planetary frame 5-2 of the power converging mechanism through the sun gear 2-3 of the power splitting mechanism and the hydraulic transmission mechanism 3, the other path is divided into two paths through the gear ring 2-5 of the power splitting mechanism and the input gear pair 4-1 of the gear-multi-disc composite transmission mechanism, the other path is transmitted to the front planetary frame 4-3 of the gear-multi-disc composite transmission mechanism, the other path is divided into two paths again through the multi-disc continuously variable transmission 4-5, one path is transmitted to the front sun gear 4-6 of the gear-multi-disc composite transmission mechanism, the other path is transmitted to the rear sun gear 4-10 of the gear-multi-disc composite transmission mechanism, the power flow transmitted to the front sun gear 4-6 of the gear-multi-disc compound transmission mechanism and the power flow transmitted to the front planet carrier 4-3 of the gear-multi-disc compound transmission mechanism are integrated, output from the front gear ring 4-7 of the gear-multi-disc compound transmission mechanism and output through the rear planet carrier 4-11 of the gear-multi-disc compound transmission mechanism, and the power flow transmitted to the rear sun gear 4-10 of the gear-multi-disc compound transmission mechanism are integrated, output from the rear gear ring 4-9 of the gear-multi-disc compound transmission mechanism, transmitted to the gear ring 5-1 of the power converging mechanism through the output gear pair 4-13 of the gear-multi-disc compound transmission mechanism, and the power flow transmitted to the planet carrier 5-2 of the power converging mechanism are converged into a whole through the power converging mechanism 5 and converged through the sun gear 5-4 of the power converging mechanism, output from the output shaft 6. At this time, the relationship between the input rotation speed and the output rotation speed is:
as shown in fig. 9, stepless speed regulation switching between the hydraulic transmission H, the gear transmission G, the multi-disc transmission B, the gear-multi-disc compound transmission GB, and the hydraulic-gear-multi-disc split transmission HGB1 is provided by adjusting the displacement ratio of the hydraulic transmission mechanism 3, the gear ratio of the multi-disc continuously variable transmission 4-5, and selectively controlling the engagement of the clutches and the brakes.
As shown in fig. 10, stepless speed regulation switching among the hydraulic transmission H, the hydraulic-gear confluence transmission HG, and the hydraulic-gear-multiple disc confluence transmission HGB2 is provided by adjusting the displacement ratio of the hydraulic transmission mechanism 3, the gear ratio of the multiple disc continuously variable transmission 4-5, and selectively controlling the engagement of the clutches and the brakes.
Illustrating:
the main parameters are as follows: i.e 1 ＝1，i 2 ＝1，k 1 ＝3.5，k 2 ＝2.5，k 3 ＝2.5，k 4 ＝3.5，i s ∈[1.25，13.15],e∈[-1，1]
When e is E [0,1]When the hydraulic transmission H gear is in the transmission range of [0, 20.25 ]]n i The method comprises the steps of carrying out a first treatment on the surface of the The gear ratio of the gear transmission G gear is 2.52n i ；
The transmission range of the multi-disc transmission B gear is [0.34,3.6 ]]n i The method comprises the steps of carrying out a first treatment on the surface of the The transmission range of the gear-multi-disc compound transmission GB gear is [2.61,3.51 ]]n i The method comprises the steps of carrying out a first treatment on the surface of the The transmission range of the hydraulic-gear-multi-disc split transmission HGB1 gear is [0,1.97 ]]n i ；
When e is E [ -1,0]When the hydraulic transmission H gear is in the transmission range of [ -20.25,0]n i The method comprises the steps of carrying out a first treatment on the surface of the The transmission range of the hydraulic-gear confluence transmission HG gear is [ -11.36, -6.86]n i The method comprises the steps of carrying out a first treatment on the surface of the The transmission range of the hydraulic-gear-multi-disc confluence transmission HGB2 is [ -14.04, -7.11 [ -7.11 ]]n i ；
Starting by adopting hydraulic-gear-multi-disc split transmission HGB1 gear, wherein the output rotating speed is linearly increased along with the increase of the displacement ratio e of the hydraulic transmission mechanism, when the displacement ratio e=0.15 of the hydraulic transmission mechanism, the transmission ratio i of the multi-disc continuously variable transmission is simultaneously satisfied s At 8.35, as shown in FIG. 9, hydraulic-gear-multiple diskThe split gear HGB1 can be switched to the multi-disc gear B; at this time, the ratio of the output rotation speed to the input rotation speed is 0.54; stepwise adjustment of the gear ratio, n, of a multi-disc continuously variable transmission 4-5 o The nonlinear increase, when the transmission ratio of the multi-disc continuously variable transmission is adjusted to be 1.79, the multi-disc transmission B gear can be switched to the gear transmission G gear, and at the moment, the ratio of the output rotating speed to the input rotating speed is 2.52; when the transmission ratio of the multi-disc continuously variable transmission is adjusted to be 1.48, the multi-disc transmission B gear can be switched to the hydraulic transmission H gear, and at the moment, the ratio of the output rotating speed to the input rotating speed is 3.04; when the transmission ratio of the multi-disc continuously variable transmission is adjusted to be 1.30, the multi-disc transmission B gear can be switched to the gear-multi-disc compound transmission GB gear, and at the moment, the ratio of the output rotating speed to the input rotating speed is 3.47; when the transmission ratio of the multi-disc type continuously variable transmission is adjusted to be 2.39, the gear-multi-disc compound transmission GB gear can be switched to the hydraulic transmission H gear, at the moment, the ratio of the output rotating speed to the input rotating speed is 3.04, and the switching positions are different, so that the output values of the hydraulic-gear-multi-disc compound transmission are different, but the output rotating speed increases along with the displacement ratio e of the hydraulic transmission mechanism and the transmission ratio i of the multi-disc type continuously variable transmission s Is increased by a decrease in (c).
The hydraulic transmission H gear starting is adopted, the output rotating speed is linearly increased along with the increase of the displacement ratio e of the hydraulic transmission mechanism, and when the transmission ratio i of the multi-disc type continuously variable transmission is s When=1.25 and the hydraulic transmission displacement ratio e is satisfied at the same time as-0.44, as shown in fig. 10, the hydraulic transmission H stage may be shifted to the hydraulic-gear confluence transmission HG stage; at this time, the ratio of the output rotation speed to the input rotation speed is-8.82, when the displacement ratio e of the hydraulic transmission mechanism is regulated to be-0.61, the hydraulic transmission H gear can be switched to the hydraulic-gear-multi-disc confluence transmission HGB2 gear, and at this time, the ratio of the output rotation speed to the input rotation speed is-12.86.
It should be understood that although the present disclosure has been described in terms of various embodiments, not every embodiment is provided with a separate technical solution, and this description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and the technical solutions in the various embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.

Claims (9)

1. The hydraulic-gear-multi-disc compound transmission device is characterized by comprising an input member, a power splitting mechanism (2), a hydraulic transmission mechanism (3), a gear-multi-disc compound transmission mechanism (4), a power converging mechanism (5), an output member, a clutch assembly and a brake assembly; the clutch assembly is used for connecting the power splitting mechanism (2) with the input end of the hydraulic transmission mechanism (3) and the gear-multi-disc compound transmission mechanism (4) respectively; the clutch assembly is used for respectively connecting the output end of the hydraulic transmission mechanism (3) and the gear-multi-disc compound transmission mechanism (4) with the power converging mechanism (5); the gear-multi-disc compound transmission mechanism (4) comprises 2 parallel transmission paths, wherein a multi-disc continuously variable transmission (4-5) is arranged in one transmission path; the clutch assembly and brake assembly provide a continuous gear ratio between the input member and the output member.
2. The hydraulic-gear-multi-disc compound transmission device according to claim 1, characterized in that the power splitting mechanism (2) comprises a power splitting mechanism planet carrier (2-1), a power splitting mechanism sun gear (2-3) and a power splitting mechanism gear ring (2-5), the power splitting mechanism planet carrier (2-1) is connected with an input member, and the power splitting mechanism sun gear (2-3) is connected with an input end of the hydraulic transmission mechanism (3);
the gear-multi-disc composite transmission mechanism (4) comprises a front planet carrier (4-3) of the gear-multi-disc composite transmission mechanism, a multi-disc continuously variable transmission (4-5), a front sun gear (4-6) of the gear-multi-disc composite transmission mechanism, a front gear ring (4-7) of the gear-multi-disc composite transmission mechanism, a rear gear ring (4-9) of the gear-multi-disc composite transmission mechanism, a rear sun gear (4-10) of the gear-multi-disc composite transmission mechanism, a rear planet carrier (4-11) of the gear-multi-disc composite transmission mechanism and an output gear pair (4-13) of the gear-multi-disc composite transmission mechanism; the front gear ring (4-7) of the gear-multi-disc composite transmission mechanism is connected with the rear planet carrier (4-11) of the gear-multi-disc composite transmission mechanism; the front sun gear (4-6) of the gear-multi-disc composite transmission mechanism is connected with the rear sun gear (4-10) of the gear-multi-disc composite transmission mechanism;
the power converging mechanism (5) comprises a power converging mechanism gear ring (5-1), a power converging mechanism planet carrier (5-2) and a power converging mechanism sun gear (5-4); the power converging mechanism gear ring (5-1) is connected with the rear gear ring (4-9) of the gear-multi-disc compound transmission mechanism; the power converging mechanism sun gear (5-4) is connected with an output member; the power converging mechanism planet carrier (5-2) is connected with the output end of the hydraulic transmission mechanism (3);
the clutch assembly includes a clutch C 1 (2-2), clutch C 2 (4-2), clutch C 3 (4-4), clutch C 4 (4-12), clutch C 5 (5-3) and Clutch C 6 (3-5); the clutch C 1 (2-2) for selectively connecting the power splitting mechanism carrier (2-1) with the power splitting mechanism sun (2-3) for common rotation; the clutch C 2 (4-2) for selectively connecting the gear-multi-disc compound transmission front carrier (4-3) with the power split mechanism ring gear (2-5) for common rotation; the clutch C 3 (4-4) for selectively connecting the input of the multi-disc continuously variable transmission (4-5) with the power split mechanism ring gear (2-5) for common rotation; the clutch C 4 (4-12) for selectively connecting the gear-multi-disc compound transmission rear sun gear (4-10) with the gear-multi-disc compound transmission rear planet carrier (4-9) for common rotation; the clutch C 5 (5-3) for selectively connecting the power combiner planetary carrier (5-2) with the power combiner sun (5-4) for common rotation; the clutch C 6 (3-5) for selectively connecting the output of the hydraulic transmission (3) with the power combiner carrier (5-2) for common rotation;
the brake assembly comprises a brake B 1 (2-4), brake B 2 (3-1), brake B 3 (4-8), brake B 4 (3-6) and brake B 5 (5-5); the brake B 1 (2-4) for selectively connecting the power splitting mechanism ring gear (2-5) with the mount; the brake B 2 (3-1) for selectively connecting the power splitting mechanism sun gear (2-3) with the mount; the brake B 3 (4-8) for selectively connecting the front sun gear (4-6) of the gear-multi-disc compound transmission mechanism with the fixing member; the brake B 4 (3-6) for selectively connecting the power combiner planetary carrier (5-2) with the fixing member; the brake B 5 (5-5) for selectively connecting the power combiner gear ring (5-1) with the fixing member.
3. The hydraulic-gear-multi-disc compound transmission according to claim 2, characterized in that the manner of transmission of the uniflow transmission, compound transmission, split transmission and confluence transmission between the input member and the output member is provided by adjusting the displacement ratio of the hydraulic transmission (3), adjusting the gear ratio of the multi-disc continuously variable transmission (4-5) and selectively controlling the engagement of the clutch assembly and the brake assembly.
4. The hydraulic-gear-multi-disc compound transmission according to claim 3, wherein the single-flow transmission includes a hydraulic transmission H, a gear transmission G, and a multi-disc transmission B;
by adjusting the displacement ratio of the hydraulic transmission (3) and selectively engaging the clutch C 6 (3-5), brake B 1 (2-4) and brake B 5 (5-5) providing a hydraulic transmission H between the input assembly and the output assembly;
by selectively engaging the clutch C 2 (4-2), clutch C 5 (5-3), brake B 2 (3-1) and brake B 3 (4-8) providing a gearing G between the input assembly and the output assembly;
by controlling the gear ratio of a multi-disc continuously variable transmission (4-5) and selectively engaging the clutch C 3 (4-4), clutch C 4 (4-12), brake B 2 (3-1) and brake B 4 (3-6) providing an inputMulti-disc drive B between the input assembly and the output assembly.
5. The hydraulic-gear-multi-disc compound transmission according to claim 4, characterized in that the clutch C is selectively engaged by controlling the gear ratio of a multi-disc continuously variable transmission (4-5) 2 (4-2), clutch C 3 (4-4), clutch C 5 (5-3) and brake B 2 (3-1) providing a gear-multiple disc compound transmission GB between the input assembly and the output assembly.
6. The hydraulic-gear-multi-disc compound transmission according to claim 5, characterized in that the clutch C is selectively engaged by adjusting the displacement ratio of the hydraulic transmission (3), adjusting the gear ratio of the multi-disc continuously variable transmission (4-5) 2 (4-2), clutch C 3 (4-4), clutch C 5 (5-3) and Clutch C 6 (3-5) providing a hydraulic-gear-multi-disc split transmission HGB1 between the input and output assemblies.
7. The hydraulic-gear-multi-disc compound transmission device of claim 4, wherein the confluent transmission mode includes a hydraulic-gear confluent transmission HG and a hydraulic-gear-multi-disc confluent transmission HGB2;
by adjusting the displacement ratio of the hydraulic transmission (3) and selectively engaging the clutch C 1 (2-2), clutch C 2 (4-2), clutch C 6 (3-5) and brake B 3 (4-8) providing a hydraulic-gear confluence transmission HG between the input assembly and the output assembly;
by adjusting the displacement ratio of a hydraulic transmission (3), by adjusting the gear ratio of a multi-disc continuously variable transmission (4-5) and by selectively engaging the clutch C 1 (2-2), clutch C 2 (4-2), clutch C 3 (4-4) and Clutch C 6 (3-5) providing a hydraulic-gear-multi-disc split transmission HGB2 between the input and output assemblies.
8. The hydraulic-gear-multi-disc compound transmission device according to claim 6, characterized in that stepless speed regulation switching between hydraulic transmission H, gear transmission G, multi-disc transmission B, gear-multi-disc compound transmission GB and hydraulic-gear-multi-disc split transmission HGB1 is provided by adjusting the displacement ratio of the hydraulic transmission mechanism (3), adjusting the gear ratio of the multi-disc continuously variable transmission (4-5) and selectively controlling the engagement of the clutch with the brake.
9. The hydraulic-gear-multi-disc compound transmission according to claim 7, characterized in that continuously variable speed shifting between gear G, multi-disc transmission B and hydraulic-gear-multi-disc split transmission HGB2 is provided by adjusting the displacement ratio of the hydraulic transmission (3), adjusting the gear ratio of the multi-disc continuously variable transmission (4-5) and selectively controlling the engagement of the clutch with the brake.
CN202310933610.6A 2023-07-27 2023-07-27 Hydraulic-gear-multi-disc compound transmission device Pending CN117028518A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310933610.6A CN117028518A (en) 2023-07-27 2023-07-27 Hydraulic-gear-multi-disc compound transmission device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310933610.6A CN117028518A (en) 2023-07-27 2023-07-27 Hydraulic-gear-multi-disc compound transmission device

Publications (1)

Publication Number Publication Date
CN117028518A true CN117028518A (en) 2023-11-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310933610.6A Pending CN117028518A (en) 2023-07-27 2023-07-27 Hydraulic-gear-multi-disc compound transmission device

Country Status (1)

Country Link
CN (1) CN117028518A (en)

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