Reduction of PTO rattle noise of an agricultural tractor using an anti-backlash gear

Shim, Seung Bo; Park, Y.J.; Kim, K.U.

doi:10.1016/j.biosystemseng.2008.04.002

Cited by 14 publications

(8 citation statements)

References 3 publications

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“…In addition, the simulation and experimental models for the rattle phenomena have been developed for more than a decade [8][9][10][11][12][13][14]. For example, Barthod et al [8] have conducted rattling test by using the simplified gearbox with a parametric study given different gear inertia, backlash and excitation conditions.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of vibro-impacts in a torsional system under both wide open throttle and coast conditions with focus on the multi-staged clutch damper

Yoon

Kim

2015

J Mech Sci Technol

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Vibro-impacts of gear pairs in a torsion system inherently occur under the steady state torque input condition since clearance type nonlinearities are related to the torsional vibration induced by the firing stroke of an engine. In order to investigate the dynamic characteristics of gear rattle, front engine and front wheel drive configuration of the manual transmission is investigated under both wide open throttle and coast conditions. This configuration is examined using 6 degree-of-freedom system model, embedded by the relevant nonlinearities such as multi-staged clutch dampers, gear backlash and drag torques. This article focuses on the relationship of vibro-impacts with key parameters of clutch dampers, where the gear rattle phenomena are defined by "sing-sided", "double-sided" and "no-impact" along with different clutch dampers. Thus, the mathematical model of the multi-staged clutch dampers is developed by including the asymmetric transition angles and pre-load effect. Based upon this nonlinear model, three real-life clutch dampers are employed and simulated results are compared with limited experimental measurements conducted on a vehicle. Also, the dynamic characteristics of gear motions under the coast condition are investigated. This coast condition is explained corresponding to different input torque conditions and its simulations show the main reasons of vibro-impacts induced by the clutch stopper well. Finally, modified clutch damper concepts for rattle-free transmission are proposed along with dynamic clutch design guidelines.

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Section: Introductionmentioning

confidence: 99%

“…Wang et al [9] have used decoupling procedure by focusing on rattling gear pairs to develop the system model. Shim et al [10] have investigated an anti-backlash to reduce the rattle noise in an agricultural tractor's driveline. Rocca and Russo [11] have constructed the lab-experiment to examine the rattle phenomena in a gear box.…”

Section: Introductionmentioning

confidence: 99%

Analysis of vibro-impacts in a torsional system under both wide open throttle and coast conditions with focus on the multi-staged clutch damper

Yoon

Kim

2015

J Mech Sci Technol

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show abstract

“…As a result, precise and desirable output rotation or displacement is gained. The double electric motor method, double helical gear antibacklash method, adjusting center distance method, and the spring-loaded antibacklash method [1][2][3][4][5][6][7] are among the approaches used to eliminate backlash in gear, rack, and pinion systems.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Dynamic Analysis of a New Antibacklash Gear Mechanism Design for Reducing Dynamic Transmission Error

Besharati

Dabbagh

Amini

et al. 2015

Journal of Mechanical Design

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In this study, a new antibacklash gear mechanism design comprising three pinions and a rack is introduced. This mechanism offers several advantages compared to conventional antibacklash mechanisms, such as lower transmission error as well as lower required preload. Nonlinear dynamic modeling of this mechanism is developed to acquire insight into its dynamic behavior. It is observed that the amount of preload required to diminish the backlash depends on the applied input torque and nature of periodic mesh stiffness. Then, an attempt is made to obtain an approximate relation to find the minimum requiring preload to preserve the system’s antibacklash property and reduce friction and wear on the gear teeth. The mesh stiffness of the mated gears, rack, and pinion is achieved via finite element method. Assuming that all teeth are rigid and static transmission error is negligible, dynamic transmission error (DTE) would be zero for every input torque, which is a unique trait, not yet proposed in previous research.

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“…However, the gear backlash caused by side clearance leads to response lag in some servomechanism [1] which reduces the control accuracy seriously. Therefore, in order to improve the driving accuracy, some suitable methods of error control must be used in some fields which need to transfer high accuracy angle or position information, such as double electric motor method, double helical gear antibacklash method, adjusting center distance method, and spring-(or torsional spring-) loaded antibacklash method [2][3][4][5][6][7][8]. Among others, the spring-loaded antibacklash gear invented in 1952 or earlier [8] is extensively used in numerous fields of industrial robot [3], precision servos [5,6], radar antennas [7], and precision machine tools.…”

Section: Introductionmentioning

confidence: 99%

“…Boyuan and Zhiwu [7] analyzed the static force of the antibacklash gear in a transmission mechanism and estimated the composite transmission error. An antibacklash gear was used in a kind of farm tractor to reduce the noise of power takeoff system by Shim et al [4], and the vibration and noise were analyzed by a simulation model which was validated by experiment.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Dynamics Modeling and Analysis of Torsional Spring-Loaded Antibacklash Gear with Time-Varying Meshing Stiffness and Friction

Yang

Shang

Luo

et al. 2013

Advances in Mechanical Engineering

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Torsional spring-loaded antibacklash gear which can improve the transmission precision is widely used in many precision transmission fields. It is very important to investigate the dynamic characteristics of antibacklash gear. In the paper, applied force analysis is completed in detail. Then, defining the starting point of double-gear meshing as initial position, according to the meshing characteristic of antibacklash gear, single-or double-tooth meshing states of two gear pairs and the transformation relationship at any moment are determined. Based on this, a nonlinear model of antibacklash gear with time-varying friction and meshing stiffness is proposed. The influences of friction and variations of torsional spring stiffness, damping ratio and preload on dynamic transmission error (DTE) are analyzed by numerical calculation and simulation, and the results show that antibacklash gear can increase the composite meshing stiffness; when the torsional spring stiffness is large enough, the oscillating components of the DTE (ODTE) and the RMS of the DTE (RDTE) trend to be a constant value; the variations of ODTE and RDTE are not significant, unless preload exceeds a certain value.

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Reduction of PTO rattle noise of an agricultural tractor using an anti-backlash gear

Cited by 14 publications

References 3 publications

Analysis of vibro-impacts in a torsional system under both wide open throttle and coast conditions with focus on the multi-staged clutch damper

Analysis of vibro-impacts in a torsional system under both wide open throttle and coast conditions with focus on the multi-staged clutch damper

Nonlinear Dynamic Analysis of a New Antibacklash Gear Mechanism Design for Reducing Dynamic Transmission Error

Nonlinear Dynamics Modeling and Analysis of Torsional Spring-Loaded Antibacklash Gear with Time-Varying Meshing Stiffness and Friction

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