In my extensive research on precision mechanical systems, I have consistently focused on the critical role of harmonic drive gears in applications requiring high accuracy and compact design. The harmonic drive gear, a unique type of gear system, comprises three primary components: a circular spline (rigid outer ring), a flexspline (thin-walled cup-shaped element with external… Read more: Finite Element Analysis and Structural Parameter Optimization of Flexspline in Harmonic Drive Gears

As a lead designer specializing in precision electromechanical systems, I have encountered numerous challenges in ensuring the reliability of worm gear mechanisms under harsh operational conditions. One persistent issue—self-locking failure during vibrational loading—prompted an in-depth investigation. This article synthesizes my team’s research, analytical methodologies, and innovative solutions to address this critical problem. Through rigorous simulations,… Read more: Enhancing the Self-Locking Performance of Worm Gear Mechanisms Under Vibrational Conditions

In modern manufacturing, gear grinding plays a critical role in achieving high precision and surface quality for transmission components. Among various methods, worm wheel gear grinding stands out due to its efficiency in generating involute profiles through continuous engagement between the grinding wheel and the gear. However, challenges such as grinding cracks and suboptimal surface… Read more: Gear Grinding Optimization and Roughness Modeling

This study investigates the dynamic characteristics of Gleason spiral bevel gears under free and contact conditions through finite element analysis. The modal parameters and stress distribution patterns reveal critical insights for optimizing gear design in high-precision grinding applications. 1. Dynamic Equation and Contact Modal Theory The fundamental dynamics of spiral bevel gear systems can be… Read more: Modal Analysis of Spiral Bevel Gear with and without Contact in Grinding Machine

Spiral bevel gears represent a specialized category of conical gears where tooth profiles follow circular arcs. During meshing, teeth engage progressively from one end to another, with multiple teeth simultaneously in contact. Compared to straight bevel gears, spiral bevel gears offer superior performance characteristics including higher overlap coefficients, reduced tooth surface pressure, smoother transmission, lower… Read more: Research and Development of CNC Spiral Bevel Gear Milling and Grinding Machine

Fatigue pitting on tooth surfaces is a critical failure mode affecting helical gears in automotive transmissions and industrial machinery. This study combines dynamic simulation with experimental validation to establish a diagnostic framework for single-tooth and multi-tooth pitting faults. A helical gear pair from a 7-speed dual-clutch transmission serves as the research object, with parameters listed… Read more: Dynamic Simulation and Diagnosis of Fatigue Pitting Fault of Helical Gear

In the realm of mechanical engineering, gear transmission systems are ubiquitous, serving as critical components in a wide array of machinery. Among these, the helical gear stands out due to its ability to transmit motion smoothly and quietly, thanks to the angled teeth that engage gradually. However, designing helical gears often involves repetitive modeling tasks… Read more: Parametric Design and Secondary Development of Helical Gears in SolidWorks Using Visual Basic

In the automotive industry, the gear shaft serves as a critical component, functioning not only as a support element but also as a primary carrier for transmitting torque and bending moments. These parts operate under severe conditions, enduring various loads and shear stresses, which necessitate high strength, toughness, surface hardness, and wear resistance. Traditional machining… Read more: Research and Simulation Optimization on Forging Process for Automotive Gear Shaft

In this study, I focus on the dynamic behavior of the planetary roller screw assembly, a critical component in linear motion systems. The planetary roller screw assembly is renowned for its high load capacity, precision, fast frequency response, and low vibration and noise at high speeds, making it indispensable in aerospace, military equipment, petroleum化工, food… Read more: Dynamic Characteristic Analysis of Planetary Roller Screw Assembly During Operation

The machining of spiral gear components, particularly those with a large prime number of teeth, presents a unique set of challenges in gear hobbing. The core difficulty lies in the simultaneous requirement for indexing (dividing) and generating the helical tooth flank. When the tooth count is a prime number greater than 100, standard indexing plates… Read more: Precise Calculation of Differential Change Gears for Large Prime Spiral Gears

1. Introduction​ As a researcher focused on improving automotive transmission efficiency, I aimed to address the churning power losses in hypoid gear systems of passenger vehicle rear axles. The primary challenge lies in the exposed bolt heads connecting the hypoid gear to the differential housing, which act as paddles during rotation, agitating the lubricant and… Read more: Numerical Simulation of Churning Losses in Hypoid Gear Systems

In this article, we explore the critical aspects of accuracy control in cycloidal-pinwheel transmission systems, which are fundamental to the performance of rotary vector reducers. As a key component in industrial robotics, the rotary vector reducer demands high precision, compact design, and robust dynamics. The focus here is on the cycloidal-pinwheel mechanism, as its transmission… Read more: Accuracy Control in Cycloidal-Pinwheel Transmission for Rotary Vector Reducers

In modern mechanical transmission systems, herringbone gears are widely adopted due to their high load-bearing capacity, large contact ratio, and balanced axial forces. However, manufacturing and assembly errors inevitably introduce asymmetries, particularly in tooth pitch deviations, which can significantly affect the dynamic performance of herringbone gear transmissions. In this study, we investigate the large-period three-dimensional… Read more: Analysis of Large-Period Three-Dimensional Vibration Characteristics in Herringbone Gears with Asymmetric Tooth Pitch Deviation

The spur gear is one of the most fundamental and widely used components in mechanical power transmission systems. Its popularity stems from a compelling set of advantages: high reliability, long service life, constant instantaneous velocity ratio, excellent transmission efficiency, compact design, and suitability for a broad range of power and speed applications. The involute tooth… Read more: Tooth Profile Modification in Low Contact Ratio Spur Gears

In the rapidly evolving automotive industry, the demand for high-performance and durable components has led to the widespread adoption of advanced manufacturing techniques. Among these, precision forging has become a cornerstone for producing miter gears, which are essential in transmission systems due to their ability to transmit motion between intersecting shafts at right angles. However,… Read more: Chamfering of Miter Gears: A First-Person Technical Perspective

In the field of mechanical engineering, spiral bevel gears play a crucial role due to their superior performance in power transmission systems. The spiral bevel gear, characterized by its curved tooth line on the pitch cone, offers significant advantages over straight bevel gears, including higher overlap ratios, increased load-bearing capacity, and smoother operation. These attributes… Read more: Research on a Simplified NC Machining Method for Spiral Bevel Gears

This study investigates the transmission error characteristics of hypoid gears by reconstructing real tooth surfaces through NURBS fitting and finite element analysis. The methodology bridges the gap between theoretical simulations and physical roll testing evaluations, providing insights into installation error sensitivity and vibration mechanisms. 1. Real Tooth Surface Reconstruction The real tooth surface coordinates are… Read more: Research on Transmission Error of Hypoid Gear Based on Real Tooth Surface

In modern mechanical systems, straight bevel gears play a critical role in transmitting power between intersecting shafts, particularly in applications requiring high efficiency and durability. The performance of these gears, especially their wear resistance, is heavily influenced by manufacturing parameters, with forging temperature being a key factor. Forging temperature, comprising the initial and final forging… Read more: Effect of Forging Temperature on Wear Resistance of Straight Bevel Gears

The efficient and reliable transmission of power is a cornerstone of mechanical design, particularly in demanding applications such as aerospace and heavy machinery. Among various gear types, bevel gears are indispensable for transmitting motion and power between intersecting axes. Their unique geometry, especially in the case of spiral bevel gears which offer high contact ratio… Read more: Modeling and Analysis of Instantaneous Sliding Friction Power Loss in Bevel Gears

In the field of mechanical engineering, non-circular gear mechanisms represent a fascinating area where the instantaneous transmission ratio varies according to a specific law. Based on the fundamental law of gearing, there is theoretically no restriction on the shape of the pitch curve, with common curves including ellipses, modified ellipses, and logarithmic spirals. Among these,… Read more: Simplified Closed Condition Algorithm for High-Order Multi-Segment Modified Elliptical Helical Gears

In mechanical engineering, the worm gear drive stands out as a crucial mechanism for transmitting motion and power between non-intersecting, perpendicular shafts. As an engineer, I have frequently encountered and utilized worm gear drives in various applications, from heavy machinery to precision instruments. This drive system, composed of a worm (similar to a screw) and… Read more: Comprehensive Analysis of Worm Gear Drive

In modern precision servo transmission systems, such as robotic joints, the demand for compact and reliable strain wave gear mechanisms has increased significantly. Lubrication plays a critical role in ensuring the longevity and efficiency of these systems. By introducing a lubricant between two moving surfaces, a lubricating film is formed, separating the surfaces and transforming… Read more: Design of a Vane-Type Active Lubrication System for Strain Wave Gears

Spiral bevel gears are indispensable components in power transmission systems, renowned for their high overlap ratio, load-bearing capacity, and transmission efficiency. These reverse gear systems transmit full engine loads in helicopter main reducers, serving as core components. Traditional manual rounding of gear tooth tips using pneumatic grinders results in inconsistent geometry, burrs, and sharp edges.… Read more: Research on Automated Tooth Tip Rounding for Spiral Bevel Gears via Reverse Gear Modeling

In this study, I focus on the modeling and static analysis of large module rack and pinion gear systems, which are critical components in low-speed, heavy-duty applications such as ship lifts, mining machinery, and offshore platforms. The rack and pinion mechanism is renowned for its high transmission efficiency, precision, compact structure, and long service life.… Read more: Modeling and Static Analysis of Large Module Rack and Pinion Gears

The analysis and prediction of power loss in mechanical transmissions, particularly those involving bevel gears, is a critical aspect of design for efficiency, reliability, and thermal management. Bevel gears, especially spiral bevel gears, are fundamental components in numerous applications where power must be transmitted between intersecting axes. Their advantages, including high load capacity, smooth operation… Read more: A Comprehensive Analysis of Time-Varying Sliding Friction Power Loss in Bevel Gear Transmissions

The pursuit of reliable and efficient power transmission in mechanical systems places significant demands on the health and integrity of their core components. Among these, helical gears are ubiquitous due to their superior characteristics, such as higher load capacity, smoother operation, and reduced noise compared to their spur gear counterparts. This smoothness stems from their… Read more: Dynamics Modeling and Analysis of Spalling Defects in Helical Gears

In modern mechanical transmission systems, the cycloidal pin wheel planetary transmission, as a type of K-H-V planetary gear transmission, offers significant advantages over conventional gear systems. Its key features include a wide transmission ratio range, compact structure, reduced weight, smooth operation with low noise, and high transmission efficiency. The gear shaft, as a critical component… Read more: Analysis and Design of Gear Shaft in Cycloidal Pin Wheel Planetary Transmission

In my extensive experience with bulk material handling equipment, the bucket wheel reclaimer stands as a critical and complex machine. Its operation depends on a symphony of subsystems, one of the most vital being the control cable reel drive. This system ensures continuous power and signal transmission between the moving machine and the fixed plant… Read more: Engineering a Robust Fix for Worm Gear Reducer Axial Drift

In the field of precision mechanical transmission, the planetary roller screw assembly has garnered significant attention due to its superior load-bearing capacity, high transmission speed, and enhanced accuracy compared to traditional ball screw systems. As a device that converts rotational motion to linear motion and vice versa, the planetary roller screw assembly finds applications in… Read more: Elastic Contact Deformation Calculation and Analysis for Planetary Roller Screw Assembly

In gear design, ensuring that the bending stress at the tooth root does not exceed the allowable bending stress is critical to prevent tooth breakage and ensure reliable operation of spur gears. Traditional methods often model the tooth as a cantilever beam with a parabolic profile inscribed within the tooth geometry. However, these approaches may… Read more: Finite Element Analysis of Bending Stress in Asymmetric Involute Spur Gears

In the realm of mechanical transmission systems, spiral bevel gears stand out due to their superior performance characteristics. As a key component in applications such as aircraft engines and automotive drivetrains, spiral bevel gears offer smooth operation, high efficiency, low noise, and exceptional load-carrying capacity. My extensive experience in gear manufacturing has shown that the… Read more: Precision Manufacturing of Spiral Bevel Gears

In the realm of precision power transmission, the cycloidal drive stands out for its high torque capacity, compact design, and excellent overload protection. Traditional single-tooth difference cycloidal drives, where the number of pin teeth exceeds the number of cycloid gear teeth by one, face significant challenges at low reduction ratios (typically i≤17). These challenges include… Read more: Analysis of Pin Stock Bending Strength and Stiffness in Two-Tooth Difference Cycloidal Drives

In the development of wheeled vehicles, the straight bevel miter gear differential stands out due to its straightforward construction, ease of manufacturing, and simple maintenance. This system is central to distributing torque while allowing wheels to rotate at different speeds. Historically, the design process for such differentials, encompassing parameter calculation and detailed drafting, has been… Read more: Computer-Aided Design System for Straight Bevel Miter Gear Differentials: A Comprehensive Development Perspective

In the field of gear manufacturing, the need for high-precision straight bevel gears after heat treatment has driven the development of specialized grinding equipment. However, dedicated straight bevel gear grinding machines are often expensive and scarce, particularly in domestic markets. To address this challenge, I have explored the transformation of a standard Y7132 gear grinding… Read more: Transformation of Y7132 Gear Grinding Machine for Straight Bevel Gear Grinding Using Generating Method

In my extensive experience with precision motion control systems, the harmonic drive gear stands out as a cornerstone technology. Its unique operating principle, based on elastic deformation, enables exceptional performance in terms of high reduction ratios, compactness, and positional accuracy. However, the very flexibility that grants it these advantages also introduces complex error dynamics. Understanding… Read more: Precision Harmonic Drive Gear Transmission Error Analysis

In my extensive experience as a mold design engineer, the creation of injection molds for precision components like spiral gears represents one of the most challenging yet rewarding endeavors. Spiral gears, with their continuous helical tooth form, are critical for smooth, quiet power transmission in applications such as automotive instrument clusters, where the part discussed… Read more: Design of Injection Molding Die for Spiral Gears

In this comprehensive study, I delve into the intricate mechanical behavior of helical gears subjected to pitting corrosion damage, a prevalent issue in high-load applications such as those found in industrial machinery. Helical gears are widely utilized due to their smooth operation and noise reduction capabilities, but their inherent axial forces during meshing can exacerbate… Read more: Mechanical Characteristics Analysis of Pitting Damage in Helical Gears

In the manufacturing of straight bevel gears, the planing process is a common method used to generate tooth profiles. However, regardless of whether the cutting is based on the flat-top gear principle (producing ordinary tooth forms) or the plane gear principle (producing octoid tooth forms), the resulting profiles deviate from the ideal spherical involute tooth… Read more: Pressure Angle Correction in Straight Bevel Gear Planing

1. Introduction As a critical component in modern vehicles, the Electric Power Steering (EPS) system has replaced traditional hydraulic systems due to its energy efficiency and superior control performance. However, the increasing complexity of EPS components, particularly in Column-mounted EPS (C-EPS), introduces challenges such as friction-induced noise. Among these, noise generated by the worm gear and worm… Read more: Friction-Induced Noise in Worm Gear of Electric Power Steering System

Gear honing has become a critical finishing process for high-precision gears across industries. This study establishes a comprehensive model for predicting surface roughness in internal gear honing operations and analyzes its variation along the tooth profile. Based on kinematic analysis and classical grinding theory, we derive motion equations and curvature relationships to quantify roughness distribution… Read more: Prediction of Surface Roughness in Internal Gear Honing and Variation Analysis

In the field of mechanical transmissions, the worm gear drive has long been recognized for its high load-carrying capacity and compact design. However, traditional worm gear drives suffer from significant drawbacks, such as high sliding friction, which leads to reduced efficiency, increased heat generation, and potential issues like wear and seizure. Over the years, various… Read more: Meshing Theory Analysis of the Modified Roller Enveloping Hourglass Worm Gear Drive

In the realm of precision linear motion transmission, the planetary roller screw assembly stands out as a pivotal mechanical component, renowned for its high load capacity, rigidity, and accuracy. As an alternative to ball screws, this assembly converts rotational motion into linear motion through rolling contact, minimizing friction and enhancing efficiency. My investigation focuses on… Read more: Study on Frictional Moment and Transmission Efficiency of Planetary Roller Screw Assembly

In mechanical transmission systems, helical gears are widely used due to their high load capacity, durability, smooth operation, and reduced impact vibration and noise. As a key component, the gear shaft plays a critical role in ensuring efficient power transmission and operational stability. Axial shaving is an economical and efficient finishing process for helical gears,… Read more: Research on Axial Shaving Machining and Dynamic Characteristics of Helical Gears

The ongoing pursuit of miniaturization and higher power density in mechanical drive systems has created a significant demand for high-ratio, compact, and robust speed reducers. In this landscape, high-ratio hypoid bevel gears are emerging as a superior alternative to traditional solutions like worm gears and planetary gear sets. Their defining characteristic—the offset between the axes… Read more: Design and Analysis of Parallel Tooth Depth High-Ratio Hypoid Bevel Gears

In the field of gear manufacturing, large modulus straight bevel gears present significant challenges due to their complex geometry and high load-bearing requirements. Traditional machining methods often rely on specialized equipment, which may not be readily available. This study explores an alternative approach using a finger-type milling cutter on a vertical milling machine. We focus… Read more: Machining and Modification of Large Modulus Straight Bevel Gears

In my extensive research into precision gear systems, I have focused on the rotary vector reducer, a compact and high-performance reduction device. The rotary vector reducer is renowned for its large reduction ratio, small volume, high efficiency, and strong load-bearing capacity, making it a critical component in robotics, aerospace, and industrial machinery. Despite these advantages,… Read more: Dynamic Modeling of Rotary Vector Reducers

In this article, I explore the development and implementation of a comprehensive computer-aided design (CAD) system for straight bevel gear differentials, which are widely used in wheeled vehicles due to their simple structure, ease of manufacturing, and maintenance convenience. The traditional design process for these differentials involves extensive parameter calculations and drafting, which is time-consuming… Read more: Research on the Computer-Aided Design System for Straight Bevel Gear Differentials

The pursuit of efficient, reliable, and quiet power transmission underpins much of mechanical engineering. Among the various solutions, gear drives stand out for their precision and versatility. While spur gears are conceptually simpler, the quest for smoother operation and higher load capacity in compact spaces has made helical gear systems a dominant choice in countless… Read more: Impact of Gear Backlash Function on the Dynamic Behavior of Helical Gear Transmission Systems

In this study, I focus on the heat treatment process of spiral bevel gears, which are critical components in transmission systems such as those used in helicopters and automotive applications. The performance and longevity of these spiral bevel gears heavily depend on their heat treatment, particularly carburizing and quenching, which induces residual stresses and deformation.… Read more: Analysis of Residual Stress and Deformation in Spiral Bevel Gear Heat Treatment Using DEFORM Finite Element Simulation

In modern precision engineering, strain wave gear transmission systems have become indispensable in applications ranging from aerospace and robotics to CNC machine tools and automated control systems. The unique working principle of strain wave gear, which relies on elastic deformation to achieve high reduction ratios and compact design, offers significant advantages. However, in configurations without… Read more: Optimization of Bionic Micro-dimple Texture Parameters on Cam Surface in Strain Wave Gear Transmission Without Flexible Bearing

The analysis of epicyclic gear trains, particularly those incorporating bevel gears, is a fundamental task in mechanical design. These systems are prized for their compactness, high power density, and ability to provide complex speed relationships, making them indispensable in applications ranging from automotive differentials to aerospace transmissions and industrial machinery. The core challenge in their… Read more: Kinematic Analysis of Bevel Gear Epicyclic Trains

Traditional gear hobbing tooling design heavily relies on accumulated experience and trial-and-error methods, often lacking systematic analytical approaches. This results in extended design cycles and increased costs. To address these challenges, this study focuses on a disc-type cylindrical involute helical gear, utilizing Finite Element Analysis (FEA) tools to develop a set of quick-change gear hobbing… Read more: Research on Design and Optimization of Gear Hobbing Tooling Based on Finite Element Analysis

In my research, I focus on the development of high-performance miter gears, which are crucial for power transmission in intersecting shafts, especially in applications like automotive differentials, aerospace systems, and industrial machinery. Miter gears, typically straight bevel gears with a 90-degree shaft angle, offer advantages such as simplicity, low axial thrust, and ease of assembly.… Read more: Analysis and Optimization of Meshing Performance for Miter Gears Machined by Dual Interlocking Circular Cutters

In my extensive experience with precision plastic components, the injection molding of spiral gears presents a unique set of challenges and opportunities. These gears, characterized by their helical teeth, are critical in applications requiring smooth, quiet, and efficient torque transmission, such as in automotive instrument clusters. The design of the mold is paramount to achieving… Read more: Design and Engineering of Injection Molds for Spiral Gears

In my extensive experience within the powder metallurgy (PM) industry, the development of high-performance components for automotive systems presents both a significant challenge and a remarkable opportunity. Among these components, the spur gear stands out due to its critical role in power transmission, particularly in automotive engine and transmission systems. The transition from traditional forging… Read more: Powder Metallurgy Spur Gear Innovation for Automotive Applications

In modern mechanical transmission systems, helical gears play a critical role due to their smooth operation, high load capacity, and reduced noise compared to spur gears. As a researcher focused on gear design and analysis, I have extensively studied the contact strength of involute helical gears, particularly for high-speed applications such as electric multiple units… Read more: Contact Strength Analysis of Involute Helical Gears Using Finite Element Method

In mechanical transmission systems, straight bevel gears are critical components due to their ability to transmit power between intersecting shafts. However, nonlinear factors such as gear backlash, time-varying stiffness, and support clearances often induce chaotic vibrations, which can severely impact system performance and reliability. I investigate the chaotic motion control of a 7-degree-of-freedom straight bevel… Read more: Chaotic Control of Straight Bevel Gear Systems via Improved PSO-Optimized Fuzzy Neural Networks

Understanding the nonlinear dynamic behavior of worm gear transmission systems is crucial for enhancing their stability, reducing vibration, and minimizing noise in high-performance industrial applications. In this study, I establish a comprehensive nonlinear dynamic model that accounts for tooth-side clearance, time-varying meshing stiffness, and composite transmission errors. Using numerical simulations and bifurcation analysis, I explore… Read more: Nonlinear Dynamic Characteristics Analysis of Worm Gear Transmission Systems

In the field of power transmission, especially for intersecting axes, spiral bevel gears are a critical component due to their ability to transmit high loads smoothly and efficiently. The performance of a spiral bevel gear pair is predominantly evaluated through its contact pattern and transmission error under load. Tooth Contact Analysis (TCA) has thus become… Read more: Tooth Contact Analysis for Spiral Bevel Gears Manufactured by the Duplex Spread Blade Method

In the steel rolling industry, the durability of herringbone gears used in main drives of plate mills has long been a critical concern. These herringbone gears, essential for transmitting high torque under severe conditions, often suffer from premature failure, leading to frequent downtime and economic losses. This article details a comprehensive practice aimed at significantly… Read more: Enhancing the Service Life of Herringbone Gears in Plate Mill Drives: A Practical Approach