scholarly journals Analysis of Planetary Gear of Toyota Rush AT 2012

2020 ◽  
Vol 5 (2) ◽  
pp. 57
Author(s):  
Adam Fathlevi ◽  
Rudi Suhradi Rachmat ◽  
Azhari Sastranegara
Keyword(s):  
Life Prediction ◽  
Power Transmission ◽  
Rotation Speed ◽  
Planetary Gear ◽  
Gear Ratio ◽  
Bending Stress ◽  
Gear Teeth ◽  
High Fatigue ◽  
Gear Mechanism ◽  
Planetary Gear Mechanism

Gear is one of the most important part of power transmission system in a vehicle, and as the time goes by there possibly some failure happened on the gears. However, there is no information provided by car manufacturer regarding the life and the material of the gears. This report presents the analysis of the planetary gear used in Toyota Rush AT year made of 2012. The objectives of the research are: to study the planetary gear mechanism and how it works; to analyze the force and stress acting on the gears; and to select a suitable gear material that can withstand against the loads that happen on the gear. The research methodology is started with finding the gear dimension and gear ratio. The force acting on gear is calculated based on the torque and rotation speed provided in car specification. Then the selection material is carried out based on the amount of stress applied on the gear teeth that were calculated using AGMA standard formulation. Finally, the fatigue life prediction of the gears is calculated based on the previous stress acting on the gears. The calculation result suggested AISI 1050 steel as the selected gear material that can carry the bending stress of 476 MPa and categorized as low to high fatigue cycle.

scholarly journals Development of a mathematical model of dynamic characteristics of a drive with a planetary mechanism

2021 ◽  
Vol 258 ◽  
pp. 08022
Author(s):  
Erkin Nematov ◽  
Mukhiddin Khudjaev ◽  
Botir Khasanov
Keyword(s):  
Mathematical Model ◽  
Dynamic Characteristics ◽  
Electric Motor ◽  
Equations Of Motion ◽  
Planetary Gear ◽  
Gear Teeth ◽  
Mechanism Research ◽  
Gear Mechanism ◽  
The Moment ◽  
Planetary Gear Mechanism

The article is devoted to the development of a mathematical model of dynamic characteristics of a drive with a planetary gear mechanism. The subject of research is a drive with a planetary gear mechanism. The following issues were considered in the article: the synthesis of a planetary gear mechanism; the development of a mathematical model that describes the dynamic characteristics of the system; the determination of the dynamic characteristics of a drive with a planetary gear mechanism. Research is based on the method of determining the number of gear teeth; the method of determining the kinetic energy of the James gearbox; the method of determining the dynamic characteristics of an electric motor. The possible number of satellites is given in the article; the pitch radii of the wheels for a given modulus are defined; the moment of inertia of the mechanism reduced to the movable central wheel is determined; a mathematical model of the motion of a drive with a planetary gear mechanism is developed. Equations of motion of a drive with a planetary gear mechanism were obtained. Assuming, in a particular case, all the links of the drive with the planetary gear mechanism as rigid links, a mathematical model was developed for this system, considering the dynamic characteristics of an electric motor. A mathematical model was developed that describes the dynamic characteristics of the system. Analytical solutions for the developed mathematical model are given.

Kinematic Analysis of an 8-Speed Bicycle Transmission Hub

2013 ◽  
Vol 479-480 ◽  
pp. 234-238 ◽  
Author(s):  
Yi Chang Wu ◽  
Pei Wun Ren ◽  
Li An Chen
Keyword(s):  
Kinematic Analysis ◽  
Power Flow ◽  
Planetary Gear ◽  
Speed Ratio ◽  
Flow Paths ◽  
Gear Teeth ◽  
Gear Mechanism ◽  
Flow Diagrams ◽  
Internal Gear ◽  
Planetary Gear Mechanism

A transmission hub is a speed changing mechanism which is an important device in the transmission system of bicycles. This paper presents the kinematic analysis of an 8-speed bicycle transmission hub by using the fundamental circuit method. First, a distributed-flow type planetary gear mechanism, which consists of two parallel-connected transmission units and one differential unit, and the corresponding clutch sequence table of an 8-speed transmission hub are introduced. Based on the fundamental circuits, four kinematic equations of the transmission hub are derived. Then, the speed ratio of each speed is formulated, which is a function of gear ratios of external and internal gear pairs. By submitting the numbers of gear teeth into these formulas, the value of speed ratio at each speed can be calculated. Finally, the power-flow diagrams at related speeds are presented to illustrate the power-flow paths of the transmission hub.

Differential planetary mechanism of reduction gear for robotic applications

2017 ◽  
Vol 232 (5) ◽  
pp. 799-803 ◽  
Author(s):  
Bumjoo Lee ◽  
Donghan Kim ◽  
Young-Dae Hong
Keyword(s):  
Three Dimensional ◽  
Planetary Gear ◽  
Gear Ratio ◽  
Drive System ◽  
Reduction Gear ◽  
Prototype System ◽  
Harmonic Drive ◽  
Differential Motion ◽  
Gear Mechanism ◽  
Planetary Gear Mechanism

This study proposes a novel planetary gear mechanism composed of normal spur gears. Similar to a harmonic drive system, one pair of gears generates differential angular motion to achieve a high reduction gear ratio. While a harmonic drive system utilizes slightly different number of gear teeth between the flex spline and the circular spline to induce differential motion, a planetary gear mechanism with different gear modules is adopted for this purpose in the proposed system. Since the manufacture of special components like the wave generator and flex spline in harmonic drive system is not required here, the machinability and usability are improved. In addition, the mechanism can be achieved with a flat shape, which is crucial for various applications such as robotic systems. After the basic concept and three-dimensional design are introduced, the prototype system is presented.

Precise and High Response Measuring Method of Meshing Force of Planetary Gear Mechanism

2012 ◽  
Vol 516 ◽  
pp. 469-474
Author(s):  
Yuta Morimoto ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Yasuhiro Uenishi
Keyword(s):  
Electric Vehicles ◽  
Automotive Industry ◽  
Differential Rotation ◽  
Planetary Gear ◽  
Measuring Method ◽  
Power Source ◽  
Hybrid Vehicles ◽  
Gear Noise ◽  
Gear Mechanism ◽  
Planetary Gear Mechanism

Recently, technology for electric vehicles (EV) and hybrid vehicles (HEV) has been focused on by the automotive industry to address environmental problems including CO2 reduction [. In particular, in HEV, planetary gears are used to control differential rotation of the motor, engine and generator. For these vehicles, the noise level inside the vehicle is low because the motor is used as the main power source. As a result, further decrease of gear noise is desired compared with the conventional planetary gear mechanism. However, research into the gear noise of the planetary gear mechanism is extremely scarce. Therefore, in this study, we focus on the three axes of I/O rotation, and a new method of measuring the meshing force of the planetary gear mechanism. In this report, a gear-driving device, which is able to make 3-axis differential rotation, was designed for experimentation.

Impact Bending Fatigue Strength of Gear Teeth Case-Hardened by Nitriding and Carburizing

2000 ◽  
Author(s):  
Koji Maenosono ◽  
Akira Ishibashi ◽  
Keiji Sonoda
Keyword(s):  
Fatigue Strength ◽  
Power Transmission ◽  
Plasma Nitriding ◽  
Impact Fatigue ◽  
Gear Teeth ◽  
High Tension ◽  
High Fatigue ◽  
Alloy Steels ◽  
Almost All ◽  
The Impact

Abstract Almost all gears used for power transmission of automobiles have been case-hardened by carburizing. Recently, strict demand for reducing running noise and vibration from the power transmission gears requires, in most cases, an additional finishing operation such as grinding and/or honing after carburizing. Nitriding is conducted at a temperature of about 820 K which is lower than the transformation temperature, and thus quenching is not required, resulting in smaller heat treatment deterioration. However, nitrided gears hardly used in practice as for power transmission gears. In the present investigation, experiments were conducted, using test gears case-hardened by two different methods, carburizing and plasma-nitriding. Test results showed that the fatigue strength of carburized gears was higher than that of nitrided gears in most cases when the test gears were made from the same steel. However, the impact fatigue strengths of nitrided gears made from a high tension steel with additional alloy elements Mo and V were higher than those of carburized gears made from the carbon and alloy steels which have been, used as for gear material. The other high tension steel containing neither Mo nor V could not bring about a sufficiently high fatigue strength in comparison with the conventional carburized gears. It should be noted that the impact fatigue strength of carburized gears made from the high tension steel was higher than the ones made of conventional carburizing steel.

S1120101 Research on durability of ultra-micro reduction gear using mechanical paradox planetary gear mechanism

2015 ◽  
Vol 2015 (0) ◽  
pp. _S1120101--_S1120101-
Author(s):  
Michimasa UCHIDATE ◽  
Kentaro SATO ◽  
Katsuya KOUNO ◽  
Yuuji OGAWA ◽  
Shigeko SASAKI ◽  
...  
Keyword(s):  
Planetary Gear ◽  
Reduction Gear ◽  
Gear Mechanism ◽  
Planetary Gear Mechanism

Research of Self-Locking in 2K-H type Planetary Gear Mechanism with External Gears

2000 ◽  
Vol 2000.2 (0) ◽  
pp. 433-434
Author(s):  
Kazuteru NAGAMURA ◽  
Tuneji YADA ◽  
Kiyotaka IKEJO ◽  
Kensei OOTA ◽  
Yoshiya KAGARI
Keyword(s):  
Planetary Gear ◽  
Gear Mechanism ◽  
Planetary Gear Mechanism
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