Investigation into the structure and transmission mechanism of a novel multistage face gear transmission based on battery discharge current constant of an electric vehicle

2019 ◽  
Vol 81 (3/4) ◽  
pp. 115
Author(s):  
Xingbin Chen ◽  
Qingchun Hu ◽  
Zhongyang Xu ◽  
Xiaofeng Liang ◽  
Jianying Li ◽  
...  
Keyword(s):  
Electric Vehicle ◽  
Discharge Current ◽  
Gear Transmission ◽  
Transmission Mechanism ◽  
Face Gear ◽  
Battery Discharge

Study on the compound transmission mechanism of the curve-face gear based on screw theory

2017 ◽  
Vol 232 (17) ◽  
pp. 3115-3124 ◽  
Author(s):  
Chao Lin ◽  
Yanqun Wei ◽  
Zhiqin Cai
Keyword(s):  
Screw Theory ◽  
Transmission Mechanism ◽  
Tooth Surface ◽  
Design Parameters ◽  
Gear Pair ◽  
Face Gear ◽  
Cylindrical Gear ◽  
Cam Mechanism ◽  
Conjugate Surfaces ◽  
Curve Face

The compound transmission mechanism of curve-face gear is a new type of gear transmission based on the cam mechanism and the curve-face gear pair. It combines the transmission characteristics of the cam mechanism and noncircular bevel gear. When the compound transmission mechanism of curve-face gear is engaged in the meshing transmission, the rotating center of the cylindrical gear is fixed and used as the driving wheel, and the curve-face gear can generate the helical motion around the axis. In this paper, the meshing characteristics and motion laws of the compound transmission mechanism of the curve-face gear are studied based on the theory of screw. Based on the meshing theory of gears, the coordinate system of conjugate surfaces is established, the basic meshing theory and equation are obtained. On this basis, combined with the principle of the cam, the transmission principle is analyzed by the screw theory. The tooth surface equation of the compound transmission mechanism of curve-face gear is deduced based on the meshing theory and the related knowledge of geometry. The motion law of the curve-face gear and the change of the motion law with the change of the basic parameters of the gear pair with different design parameters are calculated and analyzed. An experimental platform is built to verify the law of motion, and the experimental results are compared with the theoretical values. The correctness of the theoretical analysis is verified, which provides a new way for the research of the compound transmission mechanism of the curve-face gear.

Design for NGW Type Planetary Gear Transmission

2012 ◽  
Vol 479-481 ◽  
pp. 876-879
Author(s):  
Xian Zhi Li ◽  
Bao Lin Yin ◽  
Chun Shan Liu ◽  
Si Yu Chen
Keyword(s):  
Computer Program ◽  
Optimization Model ◽  
Optimization Design ◽  
Planetary Gear ◽  
Gear Transmission ◽  
Transmission Mechanism ◽  
Design Parameters ◽  
Boundary Constraint ◽  
And Mathematics ◽  
Drawing Program

This article analyzes the NGW type planetary gear transmission mechanism and structure, establishes boundary constraint conditions and mathematics optimization model in view of the smallest volume's project objective. It can realize the NGW type planetary gear transmission optimization design through compiling corresponding computer program, obtain the optimization design parameters. In optimization design's foundation, it applies the CAD technology to establish drawing program, realizes the parametric drawing.

Design of Cotton-Picking Laptop Machine without Winding

2011 ◽  
Vol 467-469 ◽  
pp. 593-596
Author(s):  
Feng Luo ◽  
Ke Qiu
Keyword(s):  
Cotton Fiber ◽  
Gear Transmission ◽  
Transmission Mechanism ◽  
Labor Intensity ◽  
Direct Drive ◽  
Improve Efficiency ◽  
Cotton Picking ◽  
Fiber Winding

The cotton fiber winding has always been a problem for a picking cotton machine to conquer. This design theoretically pointed out the reasons, at the same time around launched a mechanical cotton-pickers laptop without transmission mechanism, but with a flexible helicopter. This machine is made of cotton picking a direct drive of micro-motors to rotate, the protection cover to picking cotton, and gear transmission by the wind, thus instantly complete cotton flower of picking cotton, improve efficiency, but also greatly reduce the labor intensity of cotton.

Analysis of tooth stiffness of nutation face gear

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Guangxin Wang ◽  
Lili Zhu ◽  
Peng Wang
Keyword(s):  
Gear Transmission ◽  
Time Varying ◽  
Mesh Stiffness ◽  
Face Gear ◽  
Content Type ◽  
Gear Teeth ◽  
Meshing Stiffness ◽  
Single Tooth ◽  
Tooth Stiffness ◽  
External Face

Purpose The purpose of this paper is to obtain the single-tooth stiffness, single-tooth time-varying meshing stiffness and comprehensive meshing stiffness of the internal and external face gears and to analyze the influence of the modulus, pressure angle and tooth width of each face gear on the single-tooth stiffness of the gear in nutation face gear transmission. Design/methodology/approach From the point of view of material mechanics, the gear teeth of nutation face gear are simplified as spacial variable cross-section beams. The shear deformation of gear teeth, the bending deformation of tooth root and the additional elastic deformation caused by the base deformation are gotten by simplified trapezoidal section method, thus the stiffness of nutation face gear teeth can be obtained. The comparison with finite element method results verifies the rationality of simplified trapezoidal section method for calculating the tooth stiffness of nutation face gear. Findings The variation of stiffness of internal and external face gears along the meshing line and tooth height in nutation face gear transmission is studied, and the variation laws of single tooth stiffness, single-tooth-pair mesh stiffness and single tooth time-varying meshing stiffness of nutation face gear teeth are obtained. Originality/value Nutation face gear transmission is a new type of transmission. The stiffness of face gear teeth is analyzed, and the variation rules of single tooth stiffness, single-tooth-pair mesh stiffness and single tooth time-varying meshing stiffness of nutation face gear teeth are obtained, which not only enriches the research of nutation face gear transmission but also has important guiding significance for the application of nutation face gear in engineering practice.

Novel Gear Transmission Mechanism With Twice Unequal Amplitude Transmission Ratio

2019 ◽  
Vol 141 (9) ◽  
Author(s):  
Gaohong Yu ◽  
Zhipeng Tong ◽  
Liang Sun ◽  
Junhua Tong ◽  
Xiong Zhao
Keyword(s):  
Structural Characteristics ◽  
Angular Displacement ◽  
Planetary Gear ◽  
Gear Transmission ◽  
Transmission Mechanism ◽  
Gear Train ◽  
Transmission Ratio ◽  
Gear Pair ◽  
Pitch Curve ◽  
Gear Rack

The operation effectiveness of multi-bar transplanting mechanisms is low, and the specific changing law of the transmission ratio (the curve of the transmission ratio has twice unequal amplitude [TUA] fluctuation.), which is needed in vegetable pot seedling transplanting, is difficult to fulfill using a planetary gear train with noncircular gears and a single-planet carrier. To address this problem, we propose a noncircular gear pair that comprises an incomplete noncircular gear, rack, partial noncircular gear, and elliptical gear. The structural characteristics and the working principle of the TUA gear pair were analyzed. The pitch curve equation of the noncircular TUA gears was derived from the relationship of the angular displacement of the corresponding pitch curves. The influence of central angle α and eccentricity k on the shape of the pitch curve, angular displacement, and transmission ratio of the TUA gear pair was analyzed. The TUA gear pair was applied to a proposed vegetable seedling pickup mechanism (SPM) considering the design requirements. Finally, the feasibility of the new noncircular TUA gear transmission mechanism was verified by an SPM test.

Battery Discharge Strategies for Energy Management in Electrified Truck for Pickup and Delivery Application

2018 ◽  
Author(s):  
Mukilan T. Arasu ◽  
Qadeer Ahmed ◽  
Giorgio Rizzoni
Keyword(s):  
Fuel Consumption ◽  
Electric Vehicle ◽  
Energy Management ◽  
Hybrid Electric Vehicle ◽  
Pickup And Delivery ◽  
Vehicle Speed ◽  
Fuel Savings ◽  
Battery State Of Charge ◽  
Discharge Profile ◽  
Battery Discharge

Fuel economy in a hybrid electric vehicle is significantly affected by the battery discharge strategy. This paper investigates the blended battery discharge strategy with four possible battery State of Charge (SOC) profiles to compare the fuel savings possible over a default Charge Discharge – Charge Sustaining strategy, given that the vehicle’s duty cycle is known. A pickup & delivery truck with Range Extended Electric Vehicle (REEV) powertrain architecture has been modeled. Vehicle speed control is implemented using a distance-based driver that matches the distance traveled from every start to stop in the drivecycle. On-board energy management is implemented using the Energy Consumption Minimization Strategy (ECMS). It is found that a predicted power consumption-based battery discharge profile results in the least fuel consumption. A distance based discharge has relatively higher fuel consumption but is quite close.

Identification of Mechanical Sources of Noise in a Diesel Engine: Sound Emitted from the Valve Mechanism

1966 ◽  
Vol 181 (1) ◽  
pp. 437-451 ◽  
Author(s):  
B. J. Fielding ◽  
J. Skorecki
Keyword(s):  
Diesel Engine ◽  
Vibration Analysis ◽  
Noise Signal ◽  
Gear Transmission ◽  
Transmission Mechanism ◽  
Single Frequency ◽  
Noise Generation ◽  
Valve Mechanism ◽  
Standard Methods ◽  
Valve Gear

The sound emitted from the valve mechanism of a diesel engine was investigated by standard methods of sound and vibration analysis augmented by correlation of incidence of individual transient components. This latter technique makes use of information obtained from the tuned output of the noise signal focusing attention on the incidence of single-frequency transients. Three distinct sources of noise were exposed: valve-gear transmission mechanism, valve impact, and the flow of air through the valve gaps. The characteristics, relative contributions, and effects of these sources are discussed in detail, and insight is gained into the mechanism of noise generation and radiation.

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