Browse Topic: Cardan joint

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Rotational Vibration Test Apparatus for Laser Vibrometer Verification2021-01-109608/31/2021
Prior to making rotational vibration measurements with a laser vibrometer, it is good practice to establish that the instrument is operating properly. This can be accomplished by comparative measurement of a rotational vibration source with known amplitude and frequency. This paper describes the design and development of a rotational vibration apparatus with known amplitude and frequency to be used as a reference for comparison to concurrent and co-located measurements made by a rotational laser vibrometer (RLV). The comparative measurements acquired with the apparatus are helpful to verify proper laser vibrometer operation in between regular calibration intervals, and/or whenever the functionality of the vibrometer is suspect. In the subject apparatus, a Cardan shaft with variable input speed and angle is used to provide output torsional vibration with variable frequency and amplitude. Previously derived equations of motion for Cardan joints are used to estimate operating amplitude
Gehringer, Mark
Journal Article
CAE Predictions for Cardan Joint Induced Driveline NVH2017-01-113603/28/2017
Automotive vehicles equipped with Cardan joints may experience low frequency vehicle launch shudder vibration (5-30Hz) and high frequency driveline moan vibration (80-200Hz) under working angles and speeds. The Cardan joint introduces a 2nd order driveshaft speed variation and a 4th order joint articulation torque (JAT) causing the vehicle shudder and moan NVH issues. Research on the Cardan joint induced low frequency vehicle shudder using a Multi-Body System (MBS) method has been attempted. A comprehensive MBS method to predict Cardan joint induced high frequency driveline moan vibration is yet to be developed. This paper presents a hybrid MBS and Finite Element Analysis (FEA) approach to predict Cardan joint induced high frequency driveshaft moan vibration. The CAE method considers the elastically coupled driveshaft bending and engine block vibration due to Cardan joint excitation. Detailed driveshaft, joints, slip mechanism, differential, axle and wheels were modeled using a MBS
Liu, Jack S.P., Remisoski, Natalie, Iqbal, Javed, Egenolf, Robert
Technical Paper
Development of an Analytical Modeling Method and Testing Procedures to Aid in the Design of Cardan Joints for Front Steerable Beam Axles2013-01-081904/08/2013
The Cardan joint of a steerable beam front axle is a complicated mechanical component. It is subjected to drive torque, speed fluctuations, and joint articulation due to powertrain inputs, steering, and suspension kinematics. This combination of high torque and speed fluctuations of the Cardan joint, due to high input drive torque and/or high steer angle maneuvers, can result in premature joint wear. Initially, some observations of premature wear were not well understood based on the existing laboratory and road test data. The present work summarizes a coordinated program of computer modeling, vehicle Rough Road data acquisition, and physical testing used to predict the joint dynamics and to develop advanced testing procedures. Results indicate analytical modeling can predict forces resulting from Cardan joint dynamics for high torque/high turn angle maneuvers, as represented by time history traces recorded in rough road data acquisition. This new approach can then be used to size the
Thom, Gerald, Sheets, Alan, Brendel, Frederick F., Long, Kah Wah
Technical Paper
Development of a Multi-Body Systems Approach for Analysis of Launch Shudder in Rear Wheel Driven Vehicles2009-01-207305/19/2009
Driveline shudder is a low-frequency (10 Hz - 30 Hz) vibration issue of vehicles that can occur under various test conditions. Specifically, launch shudder is an issue that can be prevalent under vehicle take-off conditions. Factors that typically contribute to launch shudder include stick-slip excitation of friction materials (clutches) and driveline excitations, in particular, on rear wheel drive (RWD) vehicles. Shudder caused by the driveline excitation is generally related to the universal joints (Cardan joints) in the driveline system. In this case, the u-joint forces and kinematics induce a 2nd order excitation when operated under a driveline angle. This document focuses on launch shudder phenomena resulting from driveline system excitation on a RWD vehicle. An initial treatment of the physics governing launch shudder and typical factors influencing the shudder levels in vehicle are provided. Following this, the development of a multi-body systems (MBS) based approach is
Wellmann, Thomas, Govindswamy, Kiran
Technical Paper
Universal Joints and Driveshafts—Nomenclature—Terminology—ApplicationJ901_200701 (Current)01/30/2007
The following definitions and illustrations are intended to establish common nomenclature and terminology for universal joints and driveshafts used in various driveline applications. In addition, useful guidelines are included for the application of universal joints and driveshafts. For more specific details, see Universal Joint and Driveshaft Design Manual, AE-7
Drivetrain Standards Committee
Recommended Practice
Extraordinary and Special Purpose Landing Gear SystemsAIR4846 (Historical)05/19/2006
A landing gear system comprises the most compelling assembly of engineering skills. Its importance to the successful design of an aircraft can be favorably compared with that of the aircraft's wings and engines. A landing gear system consists of several different engineering disciplines, and is continually in the public eye especially with regard to safety. The primary objective of AIR4846 is to present a record of a variety of interesting gears, gear/aircraft systems and patents, and to discuss wherever possible the lessons learned, and the reasons for the design. Thus, the document is not only a historical account, but a means of recording technical knowledge for the practical benefit of future landing gear designers. Commendable efforts have been made over the years by several individuals to make such recordings, and AIR4846 will make continual reference to them. This applies to all books, papers, or specifications that have the approval of the SAE A-5 Committee. AIR4846 also
A-5B Gears, Struts and Couplings Committee
Information Report
Universal Joints and Driveshafts—Nomenclature—Terminology—ApplicationJ901_200012 (Historical)12/01/2000
The following definitions and illustrations are intended to establish common nomenclature and terminology for universal joints and driveshafts used in various driveline applications. In addition, useful guidelines are included for the application of universal joints and driveshafts. For more specific details, see Universal Joint and Driveshaft Design Manual, AE-7
Driveline Standards Committee
Recommended Practice
Trunnion-Type Double Cardan onstant Velocity Steering Joint93301611/01/1993
The parameters of a well designed vehicle steering system include a consistent torque effort at the steering wheel, a crisp and symmetric return to the straight ahead position, and a pleasing on-center feel. Historically, these features were more easily attained with a straight-line placement of the steering column relative to the gear connection. The trend toward vehicle downsizing, along with new vehicle requirements for crush zones and tighter package restraints, have necessitated the incorporation of multiple universal joint steering systems, thus making the features above more difficult to obtain. Moreover, operating angles continue to increase with the reduction of packaging space and imposed government motor vehicle safety standards. The solution presented herein introduces a small diameter, simplified double Cardan joint that, unlike multiple joint, high angle, single Cardan systems, will transmit rotational motion at near constant velocity with little or no torque variation
Boyden, David E., Doyle, Thomas J., Frutig, Edward A., Riccitelli, Martin G.
Technical Paper
New Variations of the Cardan Concept Increase Universal Joint Performance91177709/01/1991
An increased demand for greater performance of universal joints has prompted the development of joints capable of long life at high speeds, high angles, and high loads. The Cardan joint has proven to be the only design capable of meeting all these demands. New variations of the Cardan and double Cardan concepts have shown the ability to increase universal joint performance. The purpose of this paper is to define the advantages of a new universal joint design based on the Cardan concept. By changing the shape and location of component parts of the Cardan and double Cardan designs, improvements in lubrication, vibration and misalignment can be obtained. Advantages in lubrication can be accomplished by replacing the internal Cardan cross or “spider” with an external ring. Vibration improvements over the double Cardan joint are obtained by replacing the external connecting yoke with an internal connecting member. Misalignment angles up to 90° are possible with less sacrifice to joint
Cornay, Paul J., Britton, James S.
Technical Paper
Noise and Vibration Control Measures in the Powertrain of Passenger Cars91105305/01/1991
The paper describes a theoretical and experimental approach to solve vibration and noise problems in the powertrain with vibration control products on an elastomer basis. Crankshaft dampers can reduce the torsional, and - if properly tuned and designed - also the bending vibrations. The paper compares the crankshaft vibrations for different damper designs which shows the potential for further vibration and noise reductions. Shafts in the drivetrain are excited to torsional and bending vibrations by the inertia and gas forces of the engine, cardan joints and gear mesh. For the following two problems vibrations and noise are investigated: 1. A torsional resonance of a driveshaft 2. A bending resonance of a halfshaft Measurements show that noise and vibrations from the drivetrain can also be reduced significantly with tuned elastomer dampers
Schwibinger, Peter, Hendrick, David, Wu, Wei, Imanishi, Yasuhiro
Technical Paper
Reduction of Vibration and Noise in the Powertrain of Passenger Cars with Elastomer Dampers91061602/01/1991
The paper describes a theoretical and experimental approach to solve vibration and noise problems in the powertrain with vibration control products on an elastomer basis. Crankshaft dampers can reduce the torsional, and - if properly tuned and designed - also the bending vibrations. The paper compares the crankshaft vibrations for different damper designs which shows the potential for further vibration and noise reductions. Shafts in the drivetrain are excited to torsional and bending vibrations by the inertia and gas forces of the engine, cardan joints and gear mesh. For the following two problems vibrations and noise are investigated: 1 A torsional resonance of a driveshaft 2 A bending resonance of a halfshaft Measurements show that noise and vibrations from the drivetrain can also be reduced significantly with tuned elastomer dampers
Schwibinger, Peter, Hendrick, David, Wu, Wei, Imanishi, Yasuhiro
Technical Paper
UNIVERSAL JOINTS AND DRIVESHAFTS—NOMENCLATURE—TERMINOLOGY—APPLICATION GUIDELINESJ901_198503 (Historical)03/01/1985
Driveline Standards Committee
Recommended Practice
Computer-Aided Analysis of a Steering Column Using Cardan Universal Joints84120409/01/1984
The methodology has been developed to analyze the forces and stresses in a steering column with any arbitrary Cardan univeral joint system. Various forces and moments in a two Cardan joint system supported by two anti-friction radial bearings on both the input and output shaft have been determined as a function of shaft rotational angle. It is assumed that the torque and axial force in the input shaft are given. With this assumption, 30 unknowns are solved from 30 simultaneous force and moment equilibrium equations for the three shafts and two crosses. This general analysis will determine bearing loadings, torque variations within the system, and allow calculation of stress fields within critical components. A more efficient design for the system can be realized with the results of such an analysis
Cowles, John H., Chiu, Y. P.
Technical Paper
Systematic Development of Universal and Constant Velocity Joints84056602/01/1984
A systematic procedure for finding approaches is presented in this paper for the development and design of new universal joint shafts in the field of drive technologies. Building upon known joint designs, including the universal joint, the double Cardan joint, and ball-type constant velocity joints based on the Rzeppa, Weiss, or Tripot principles, the work steps in this development methodology for finding new concepts are arranged in a design engineering analysis and a synthesis portion. Joint designs abstracted under these provisions can be distinctly cross-compared within the kinematic chains and examined for common features that, following this, can be summarized in one common basic joint model. The joint synthesis contains the same work steps as the joint analysis, however, the sequence is reversed, meaning that it proceeds from the abstract to the concrete, and it generates new concept approaches based on the basic joint model by, for example, number variation of the kinematic
Balken, Jochen F.
Technical Paper
Simulation of Torque Characteristics in Drivelines with Universal Joints82102702/01/1982
The variations of torque in drivelines with single and double cardan U-joints in a 4-wheel-drive articulated farm machine in motion have been studied by computer simulation. A mass elastic model for an engine, power train and the machine is used for the simulation. The effects of tire slips and traction parameters on torque variation of drive shafts have also been included in the study. The torque in drive train input drive shaft with single U-joints having large angular unequality for 40 deg. articulation and 15 deg. oscillation about center pivot has shown severe fluctuations with reversals. The yoke accelerations are also beyond acceptable values. The power train output shaft does not show much of a torque variation because of lower speed and effective inertias and stiffnesses. The driveline torque variation is reduced when the angular unequality is made smaller. The use of double cardan joints with as high a joint angle as 32.5 deg. is found to have lowered the torque fluctuation
Kar, Malay K.
Technical Paper
AEROSPACE VEHICLE CRYOGENIC DUCT SYSTEMSARP735 (Historical)09/01/1980
AC-9 Aircraft Environmental Systems Committee
Recommended Practice
Constant Velocity Joints and Their Applications78009802/01/1978
Various families of constant velocity joints have been developed and applied in mass production vehicles, to overcome limitations imposed by cardan joints in automotive drive line applications. The special requirements of front wheel, rear wheel and longitudinal drive lines, as well as the different construction principles are specified and analysed. Furthermore the individual characteristics and features of the main GKN fixed and plunging joints are described. Forecast vehicle design requirements are identified which led to the development of a new constant velocity joint family
Girguis, Sobhy L., Sankey, Ivor G., Schüler, Volker, Guimbretiere, Pierre
Technical Paper
Double Cardan Constant Velocity Universal Joint74067102/01/1974
The double Cardan joint is a solution for many driveline design configurations where the speed and included continuous operating universal joint angle requirements make it impossible to use a single Cardan joint. The basic design principals, dynamic operating characteristics, and the application of the double Cardan constant velocity universal joint are presented as a guide to the application of the double Cardan-type universal joint. Vehicle concepts are made possible with the preferred or most convenient location of components by using a double Cardan design. It offers an economical solution to driveline configurations that must operate at unequal compound angles
Cooney, Charles E.
Technical Paper
UNIVERSAL JOINT AND DRIVE SHAFT NOMENCLATURE AND TERMINOLOGYJ901A_196708 (Historical)08/01/1967
Driveline Standards Committee
Recommended Practice
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