Your Selections

Universal joints
Show Only

Collections

File Formats

Content Types

Dates

Sectors

Topics

Authors

Publishers

Affiliations

Committees

Events

   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Kinematic Analysis and Simulation of the Double Roller Tripod Joint

South China University of Technology-Yinyuan Qiu, Wen-Bin Shangguan
Published 2019-06-05 by SAE International in United States
The kinematic model of the double roller tripod joint is established in order to analyze its kinematic characteristics and provide theoretical basis for its application and improvement. By means of spatial coordinate transformation, the translational and rotational motion equations of the rollers relative to the tracks and trunnions, the motion equation of the center of the tripod and the equations of the input/output angular displacement error and bending angle are derived. The motion simulation of the double roller tripod universal joint was carried out in ADAMS so as to verify the established kinematic model. The results show that the rollers of the double roller tripod joint only have periodic translational motions relative to the tracks while the rollers have both periodic translational and rotational motions relative to the trunnions. The tripod’s center does the circular motion on the tripod plane with the angular velocity 3 times of the input angular velocity. The input/output angular displacement error and bending angle have volatility, and their fluctuating frequency are 3 times of the input rotational frequency. Hence, the…
This content contains downloadable datasets
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Optimizing Steering Column Layout and UJ Phase Angle to Enhance Vehicle Dynamics Performance

Tata Motors Ltd.-Praneeth Puvvula, Ajit Dubal, Swapnil Salunkhe
Tata Technologies Ltd.-Susheel Ravuri
Published 2019-02-05 by SAE International in United States
Vehicle dynamics is one of the most important vehicle attributes. It is classified into three domains, the longitudinal, vertical, and lateral dynamics. This paper focuses on optimizing the lateral vehicle dynamics which is driven by the straight ahead controllability and cornering controllability of the vehicle. One of the important parameters that dictates these sub-attributes is the steering ratio. Therefore, designing the right steering ratio is critical to meet the vehicle “specific” targets. Significant amount of work has been done by many researchers on variable steering ratio by implementing variable gear ratio (VGR) rack, active steering, and steer-by-wire systems. This paper discusses the methodology and considerations to optimize the steering ratio for a constant gear ratio rack by optimizing the steering column layout, viz., orientation and the phase angle in universal joints. A detailed analysis of steering system layout is done to optimize the steering ratio to enhance the vehicle dynamics performance. Full vehicle-level multibody dynamics (MBD) simulations are done in ADAMS® to compare the vehicle response behavior for different steering ratios in the open-loop objective…
This content contains downloadable datasets
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Optimization of Propeller Shaft Vibrations in Truck Segment through Physical and Virtual Simulations

VE Commercial Vehicles Ltd-Jeevan Jathar, Sonu Paroche, Kunal Kamal, Suresh Kumar Kandreegula
Published 2018-07-09 by SAE International in United States
This paper presents theoretical calculation, analysis and simulation (validation and verification) of driveshaft torsion vibration. The vibration measurement validation verification has been carried out on vehicle (4x2) having four cylinder engine 85kw@2800 rpm and six speed manual transmission for getting correlation between values of theoretical calculations and CAE results.This analysis has been done in order to achieve vehicle good performance in terms of driving comfort as well as smooth functionality with zero vibration frequency at high speed. The propeller shaft series selection and refinement has been done using theoretical iteration with operating angle of prop shaft which exits in between the universal joint planes. A frequency of vibration analysis has evaluated at different propeller shaft layout and duty cycle.The vibration performance predictions for vehicles with these design is rigorously done. The required parameters are recorded, compared in tabulated form shown in graphical way. The lowest operating angle of drive shaft design leads to optimize the vibration and provide better overall vehicle performance at different speed. An effective selection of drive shaft layout has been done…
This content contains downloadable datasets
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Handles and Attachments for Hand Socket Wrenches

EG-1B Hand Tools Committee
  • Aerospace Standard
  • AS4283C
  • Current
Published 2017-12-07 by SAE International in United States
This SAE International Standard covers handles and attachments for use with sockets and crowfoot wrenches in aerospace applications involving high torque, limited clearances, and generally clean conditions. This document provides additional requirements beyond ASME B107.110, Category 10 appropriate for aerospace use. Inclusion of dimensional data in this document is not intended to imply all of the products described therein are stock production sizes. Consumers are requested to consult with manufacturers concerning lists of stock production sizes.
This content contains downloadable datasets
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Gear Whine Noise Investigation of a Bus Rear Axle - Todays Possibilities and Outlook

AVL LIST GmbH-Martin Sopouch
AVL-AST d.o.o-Josip Hozmec
Published 2017-06-05 by SAE International in United States
This paper presents a simulation environment and methodology for noise and vibration analyses of a driven rear axle in a bus application, with particular focus on medium to high frequency range (400 Hz to 3 kHz). The workflow demonstrates structure borne noise and sound radiation analyses. The fully flexible Multi-Body Dynamics (MBD) model - serving to cover the actual mechanical excitation mechanisms and the structural domain - includes geometrical contacts of hypoid gear in the central gear and planetary gear integrated at hubs, considering non-linear meshing stiffness. Contribution of aforementioned gear stages, as well as the propeller shaft universal joint at the pinion axle, on overall axle noise levels is investigated by means of sensitivity analysis. Based on the surface velocities computed at the vibrating axle-housing structure the Wave Based Technique (WBT) is employed to solve the airborne noise problem and predict the radiated sound. Actual capabilities and limitations of the applied hypoid gear contact model are identified by comparing simulated and measured housing surface acceleration as well as sound pressure levels. Finally, a superior…
This content contains downloadable datasets
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Parameter Sensitivity Analysis of a Light Duty Truck Steering Returnability Performance

Dong Feng Automobile Co.,Ltd.-Yan Wang
Huazhong University of Science and Technology-Tianqi Lv, Xingxing Feng, Yunqing Zhang
Published 2017-03-28 by SAE International in United States
Steering returnability is an important index for evaluating vehicle handling performance. A systematic method is presented in this paper to reduce the high yaw rate residue and the steering response time for a light duty truck in the steering return test. The vehicle multibody model is established in ADAMS, which takes into consideration of the frictional loss torque and hydraulically assisted steering property in the steering mechanism, since the friction, which exists in steering column, spherical joint, steering universal joint, and steering gear, plays an important role in vehicle returnability performance. The accuracy of the vehicle model is validated by road test and the key parameters are determined by executing the sensitivity analysis, which shows the effect of each design parameter upon returnability performance. Analysis results indicate that the key parameters are the steering gear internal fluid resistance, mechanical friction, the caster angle and the torsion bar stiffness, which greatly influence the yaw rate residue and steering response time.
This content contains downloadable datasets
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Hazard Reduction for Horizontal Earthboring Machines

MTC9, Trenching and Horizontal Earthboring Machines
  • Ground Vehicle Standard
  • J2305_201701
  • Current
Published 2017-01-18 by SAE International in United States
This SAE standard applies to horizontal earthboring machines (SAE J2022) of the following types: a Auger boring machines; b Rod pushers; c Rotary rod machines; d Impact machines. This document does not apply to specialized horizontal directional drills, mining machines, conveyors, tunnel boring machines, pipe jacking systems, micro tunnelers, or well drilling machines.
This content contains downloadable datasets
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Balancing Machines: Tooling Design Criteria

EG-1A Balancing Committee
  • Aerospace Standard
  • ARP4163
  • Current
Published 2016-05-20 by SAE International in United States
This document establishes general design criteria, tolerances, and limits of application for tooling, fixtures and accessories for mounting and driving gas turbine engine rotors on horizontal and vertical balancing machines. For your own safety, while using balancing tooling, regard the safety instructions of the individual supplier.
This content contains downloadable datasets
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Methodology to Analyze the Suspension Influence on Propeller Shaft Efforts

MAN Latin America-Vitor Braga Ferreira de Souza
Published 2016-05-11 by SAE International in United States
With the constant evolution of vehicle systems becomes increasingly challenging the Components project. The demand for mass and cost optimization in a challenging project schedule scenario generates a great challenge to the engineering teams, who look for design and development methods more assertive. In order to reduce the risk of failure, testing time and design cost, simulation tools are being increasingly used. A major challenge in the component project for trucks and buses is the knowledge of the real loads that the components are subjected. In the case of propeller shaft bearings several factors should influence the magnitude of the efforts. The biggest influent factors that has been studied and discussed widely for many years are the torque and joints angles. The “SAE Universal joint and drive shaft design manual” depicts masterfully some formulations to determine the bearing efforts considering effects of geometry and torque, however, with the practical experience, we are faced in some specific situations, with components lifetime lower than expected and even with components plastically deformed demonstrating that the real efforts were…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Companion Flanges, Type A (External Pilot) and Type S (Internal Pilot)

Drivetrain Standards Committee
  • Ground Vehicle Standard
  • J1946_201601
  • Current
Published 2016-01-26 by SAE International in United States
This SAE Standard specifies the nominal dimensions and tolerances which affect the interchangeability between companion flanges and mating parts. The flanges covered by this document are designated type A and type S. The type A flanges are equivalent to type A ISO 7646. The type S flanges are equivalent to the type S ISO 7647. Type A is an external (male) pilot construction and type S is an internal (female) pilot construction. These flanges are not interchangeable. Dimensions not specified are left to the discretion of the component manufacturer.
This content contains downloadable datasets
Annotation ability available