Novel Torus-Involute Gear Transmission

2012 ◽  
Vol 155-156 ◽  
pp. 1050-1055
Author(s):  
Lei Liu ◽  
Zhu Qing Huang
Keyword(s):  
Design Method ◽  
Gear Transmission ◽  
Transmission Ratio ◽  
Gear Drive ◽  
Involute Gear ◽  
Involute Gears ◽  
Shaft Angle

A novel torus-involute gear transmission is presented in this paper. There are two types of tooth profiles for torus-involute gears: convex tooth and concave tooth. Torus-involute gears are non-sensitive to axial misalignments and allow variable shaft angle without meshing interference. Based on revealing of essence for tooth profiles, introducing the parameter t and discretizing this type of gear into tiny linear continuous corrected gears, a design method is proposed. To testify whether the transmission ratio of torus-involute gear transmission is constant, simulation is implemented in commercial codes ADAMS. The computed results show that this novel gear drive can achieve a constant transmission ratio with variable shaft angle.

Spiral involutes and their application in gear transmission

2011 ◽  
Vol 225 (12) ◽  
pp. 2981-2990 ◽  
Author(s):  
L Liu ◽  
Y H Huang
Keyword(s):  
Gear Transmission ◽  
Transmission Ratio ◽  
Tooth Surface ◽  
Helical Gears ◽  
Gear Drive ◽  
Uniform Velocity ◽  
Solid Models ◽  
Involute Gears ◽  
New Type ◽  
Cylindrical Spiral

Involute helical gears mesh based on the intersections of involute helicoids. However, spiral involutes on the tooth surface do not participate in meshing directly. A new type of gear drive, the spiral involute gear drive, is proposed that works on the contact of spiral involutes. The generation of tooth profile is introduced in detail. Through relative-stagnation method, spiral involutes prove to have conjugation characteristics. To testify whether the transmission ratio of cylindrical spiral involute gears is constant, simulation is implemented in commercial codes ADAMS based on solid models of a pair of spiral involute gears. The computed results show that this novel gear drive can achieve a constant transmission ratio. Due to transmission with uniform velocity, cylindrical spiral involute gears can be used in transmission between intersecting axes. Milling and grinding apply to manufacturing of spiral involute gears.

Spiral Involutes and its Application in Gear Transmission

2011 ◽  
Vol 228-229 ◽  
pp. 106-113 ◽  
Author(s):  
Yin Hui Huang ◽  
Liu Lei
Keyword(s):  
Gear Transmission ◽  
Transmission Ratio ◽  
Tooth Surface ◽  
Helical Gears ◽  
Gear Drive ◽  
Solid Models ◽  
Involute Gears ◽  
New Type ◽  
Cylindrical Spiral ◽  
Generating Grinding

Involute helical gears mesh based on the intersections of involute helicoids. However, spiral involutes on the tooth surface do not participate in meshing directly. A new type of gear drive, the spiral involute gear drive is proposed that works on contact of spiral involutes. The generation of tooth profile is introduced in detail. Through relative-stagnation method spiral involutes prove to have conjugation characteristics. To testify whether the transmission ratio of cylindrical spiral involute gears is constant, simulation is implemented in commercial codes ADAMS based on solid models of a pair of spiral involute gears. The computed results show that this novel gear drive can achieve a constant transmission ratio. Due to transmission with uniform velocity, cylindrical spiral involute gears can be used in transmission between intersecting axes, so that generating milling and generating grinding can be achieved.

Effect of tooth waist order parameters of double involute gears on lubrication performance of gear drive

2016 ◽  
Vol 68 (6) ◽  
pp. 671-675 ◽  
Author(s):  
Zhimin Fan ◽  
Wanfeng Zhou ◽  
Ruixue Wang ◽  
Na Wang
Keyword(s):  
Elastohydrodynamic Lubrication ◽  
Reference Value ◽  
Tooth Profile ◽  
Order Parameters ◽  
Content Type ◽  
Oil Film ◽  
Gear Drive ◽  
Involute Gear ◽  
Lubrication Performance ◽  
Involute Gears

Purpose The purpose of this paper is to derive a new lubrication model of double involute gears drive and study the effect of the tooth waist order parameters of double involute gears on lubrication performance. Design/methodology/approach The new lubrication model of double involute gears drive was established according to the meshing characteristics of double involute gears drive and the finite length line contact elastohydrodynamic lubrication theory. Numerical calculation of the lubrication model of gear drive was conducted using the multigrid method. Findings The results show that the oil film necking phenomenon and the oil film pressure peak emerged at the tooth waist order area and the tooth profile ends, and when compared with involute gear, the lubrication performance at the tooth waist order area is better than that at the tooth profile ends. The effect of tooth waist order parameters on lubrication performance at the tooth waist order area was greater than that at other areas. Originality/value This research will promote the application of the double involute gear as soon as possible, and it has the reference value for other types of gears.

Dynamic Simulation Analysis of Asymmetric Involute Gear Drive System

2012 ◽  
Vol 215-216 ◽  
pp. 974-977 ◽  
Author(s):  
Li Ming Lian ◽  
Gui Min Liu
Keyword(s):  
Dynamic Simulation ◽  
Dynamic Characteristics ◽  
Simulation Analysis ◽  
Dynamic Performance ◽  
Transmission System ◽  
Drive System ◽  
Gear Transmission ◽  
Gear Drive ◽  
Involute Gear ◽  
Gear Transmission System

The dynamic performance of asymmetric involute gear transmission system is analyzed by the MSC.ADAMS software during the paper. By comparative analyzed with the traditional dynamic characteristics of symmetrical involute straight gear transmission, it can be summarized that the asymmetric involute gear transmission system has better vibration characteristics in the course of transmission.

Gearing principle and geometric design of conical involute gear pairs with crossed axes

2004 ◽  
Vol 218 (12) ◽  
pp. 1517-1526 ◽  
Author(s):  
J He ◽  
X Wu ◽  
Y Cui
Keyword(s):  
Helix Angle ◽  
Design Methods ◽  
Reference Plane ◽  
Gear Drive ◽  
Involute Gear ◽  
Involute Gears ◽  
Crossed Axes ◽  
Gear Drives ◽  
Design And Manufacture ◽  
Reverse Methods

A group of formulae for the geometric parameters, such as the gear mounting distance, crossed-axes angle, centre distance and helix angle of the tooth projection on the reference plane of a reference rack, of a crossed-axes gear drive of different arrangements are derived based on the analysis of the spatial mesh relationship between conjugate gears and their reference rack. A set of geometrical design methods for conical involute gear pairs with crossed axes (non-intersecting and non-parallel axes) is presented. The formulae can be applied not only to all of the possible independent forms of crossed-axes gear drives but also to the case of gearing with parallel axes and intersecting axes. The design methods consist of two parts, the sequential and the reverse methods. The former is used to determine the mounting dimensions when the basic dimensions of a pair of conical involute gears are given, while the latter is used to determine basic dimensions of a pair of gears when the mounting dimensions are known. The formulae and the methods are verified through the design and manufacture of a set of testing gears.

scholarly journals Bidirectional modification of gears in the generalized theory of meshing

2019 ◽  
Vol 287 ◽  
pp. 01006
Author(s):  
Ognyan Alipiiev
Keyword(s):  
New Classification ◽  
Gear Drive ◽  
Involute Gear ◽  
Different Types ◽  
Involute Gears ◽  
Proposed Modification ◽  
Gear Drives ◽  
Tangential Directions

An important part of “Generalized theory”, developed by the author of this article, is the “bidirectional modification” of involute gears. The main point of the proposed modification is that together with the traditional “radial modification” of the basic rack, an additional “tangential modification” of the side profiles of the rack-cutters is introduced. As a result, the area of possible existence of involute gear drives in the generalized theory is considerably extended. Based on the bidirectional modification, a new classification of involute gears at their meshing with a rack cutter is proposed. The classification is characterized by a significant variety, which is composed of thirteen different types of gears: a zero gear; two radially modified gears; two tangentially modified gears and eight two-way modified gears. Based on the bidirectional modification in radial and tangential directions, a new classification of the involute gear drives is proposed. The classification is composed of sixteen different types of gear drives: a zero gear drive, three equally-modified gear drives; two balanced gear drives; five positive gear drives and five negative gear drives.

Study and Experimental Analysis of Oval Bevel Gear Transmission

2011 ◽  
Vol 121-126 ◽  
pp. 2263-2267 ◽  
Author(s):  
Chao Lin ◽  
Yu Jie Hou ◽  
Qing Long Zeng ◽  
Hai Gong ◽  
Ling Nie ◽  
...  
Keyword(s):  
Parametric Design ◽  
Design Method ◽  
Bevel Gear ◽  
Gear Transmission ◽  
Transmission Ratio ◽  
Motor Speed ◽  
Spherical Coordinate ◽  
Profile Equation ◽  
Pitch Curve ◽  
Check Experiment

Oval bevel gear is introduced as a new gear transmission type of intersecting axes, in which high-order, denaturing and eccentric one are included. Based on the theory of spatial engagement, spatial spherical coordinate system of the noncircular bevel gearing was developed and a generalized tooth profile equation of noncircular bevel gears was also proposed. The gear profile can be enveloped for the generating movement between conical cutter and oval bevel gear according to the envelope principle of conjugate profiles. Then a new and general parametric design method for oval bevel gear was founded. The classification and gear variability condition of oval bevel gear were discussed. Meanwhile, its pitch curve, addendum and dedendum curve were studied, and the corresponding equations were deduced. A roll check experiment is performed on the prototype workpiece. Then the influences of motor speed and load on transmission ratio were analyzed. Finally, the design method, profile generation method and manufacture method of oval bevel gear were certified as correct by comparing experimental curve of transmission ratio with theoretical one.

Simulation Research on Undercutting Properties of Involute Gears Based on VB

2013 ◽  
Vol 655-657 ◽  
pp. 408-411
Author(s):  
Jia Ning He ◽  
Yong Gao ◽  
Hai Bin Zhang ◽  
Chao Zhang ◽  
Xu Lei Deng
Keyword(s):  
Mathematical Model ◽  
Visual Basic ◽  
Gear Transmission ◽  
Dynamic Processes ◽  
Tooth Root ◽  
Simulation Research ◽  
Involute Gear ◽  
Generating Method ◽  
Involute Gears ◽  
Reliable Basis

Establishing the corresponding relationship between radius at tooth tip and tooth root fillet by the curvature of conjugate flank based on the generating method to manufacture for gears. According to the Visual Basic, a 2-D mathematical model of relationship between undercutting phenomena and modulus, teeth and modification coefficient of involute gear was built, and then simulated undercutting influence level caused by modulus, teeth and modification coefficient. The generating method dynamic processes, generating profile and the root drawing obtained by the simulation will directly reflect the influences that modulus, teeth and modification coefficient with gears meshing processions, and provided a reliable basis for design gear transmission and machining involute gears.

Tooth Profile Design for Translational Meshing Motor

2013 ◽  
Vol 365-366 ◽  
pp. 14-18
Author(s):  
Rui Hua Li
Keyword(s):  
Design Method ◽  
Coincidence Degree ◽  
Tooth Profile ◽  
Transmission Ratio ◽  
The Novel ◽  
Pressure Angle ◽  
Involute Gears ◽  
Profile Design ◽  
Center Distance ◽  
Internal Meshing

As the reason for large transmission ratio, small center distance and interference on translational motor body, the design method of involute gear for translational meshing motor was proposed. In order to get appropriate tooth profile parameters, the trail calculation considering the conditions of interference and coincidence degree were applied using the tooth profile parameters calculated from given module, number of teeth, pressure angle and modification coefficient. The internal meshing gears was designed and processed based on proposed method. The novel translational meshing motor using designed involute gears operates successfully and efficiently which testify the validity and feasibility of proposed method.

Meshing and Bearing Analysis of Nutation Drive with Face Gear

2020 ◽  
Vol 13 (4) ◽  
pp. 352-365
Author(s):  
Guangxin Wang ◽  
Lili Zhu ◽  
Peng Wang ◽  
Jia Deng
Keyword(s):  
Contact Stress ◽  
High Efficiency ◽  
Transmission Ratio ◽  
Contact Strength ◽  
Hertz Contact ◽  
Face Gear ◽  
Compact Structure ◽  
Gear Teeth ◽  
Gear Drive ◽  
Number Of Teeth

Background: Nutation drive is being extensively investigated due to its ability to achieve a high reduction ratio with a compact structure and the potential for low vibration, high efficiency and design flexibility. However, many problems including the difficulty to process the inner bevel gear, less number of teeth in engagement and not being suitable for high-power transmission have restricted its development. Objective: The purpose of this paper is to analyze the contact strength of a patent about a new nutation drive developed based on meshing between two face gears, which has the advantages of both face gear and nutation drive, including large transmission ratio, large coincidence, small size, compact structure and strong bearing capacity. Methods: Based on the meshing principle and basic structure of the nutation face gear drive, the contact strength of nutation face gear transmission is analyzed by the Hertz contact analysis method and FEM method. Results: The maximum stress values of nutation face gear teeth are compared by two methods, which verify the accuracy of Hertz contact analytical method in calculating the contact strength of nutation face gear teeth. Furthermore, nine groups of three-dimensional models for the nutation face gear drive with a transmission ratio of 52 and different cutter parameters are established. Conclusion: The study analyzes the contact stress of fixed and rotary face gears in meshing with planetary face gears, and obtains the distribution law of contact stress and the influence of the number of teeth and parameters of the cutter on the load-carrying capacity.

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