Performance Of The Manual Transmission Shift Mechanism Based On Virtual Prototype Technology

Shifting mechanisms are important components of the transmission, as the consumer marketmatures, customers requirements continue to improve the performance of the shift mechanism,shift mechanism, the performance of the research is becoming more and more important. Since theshifting process is a process that occurs in a very short time, and the many factors affecting theshifting performance, traditional analytical methods is difficult to analyze the impact of variousparameters on the shifting performance. The successful application of virtual prototypingtechnology in the engineering, not only can shorten the product development cycle, cost savings,and reduce reliance on physical prototypes through virtual simulation test, and achieved a highaccuracy of the simulation, to improve the performance of the products, and enhance thecompetitiveness of their products.This paper aims to build a virtual prototype of the shift mechanism, through virtual simulationto simulate the actual shift process, based on research at the same time the shifting mechanismshifting performance. The main work of this paper are as follows:Through the analysis of the working principle of the shift mechanism of the manualtransmission, a clear shift process in several typical process. In this paper, the existing set-shifting mechanism, so no need to design drawings, but due to the need to set up the various partsof the constraints, load and initial conditions in creating a virtual prototype, this paper, based ontheoretical analysis, deduced the relationship of a series of shift mechanism. These relationshipsare universal and can be applied to other transmission shift mechanism.Create a virtual prototype model of the shift mechanism. Build three-dimensional model ofthe shift mechanism in three-dimensional modeling software ProE, and complete the finalassembly. Will be assembled in ProE shifting mechanism3D model is to export Parasolid formatinto ADAMS ADAMS/VIEW able to identify. Then, according to the mutual movementrelationship between the various components of the working process of the shifting mechanism, toadd constraints, the contact force and the shifting force, and engaging theoretical derivationformula to calculate the practical constraints of this shift mechanism according to the designinformation, and its given the ADAMS dynamic model.Shifting mechanism established virtual prototype model, the first simulation synchronizationprocess in particular the friction coefficient and the shift force synchronous torque curve andsynchronization time synchronization process synchronization ring, engagement ring gear angularvelocity with time of the curve. Calculated from the simulation results measured synchronoustorque and synchronization time with the theoretical value of the difference is small, to verify thecorrectness of the model. Secondly, in order to study the influence of the synchronizing torque, the synchronization time of the friction coefficient and the shift force, respectively, to take differentvalues of the friction coefficient and the shift force simulation test, the tests showed that the greaterthe friction coefficient, the greater the synchronizing torque, the synchronization time shorter;shift the greater the force, the greater synchronizing torque, and the synchronization time isshorter. This conclusion is entirely consistent with the theoretical analysis. Final study of theimpact of the shift the positioning seat on shifting performance, achieved through the simulationtest the shift positioning seat at the contact force, contact torque curve, can very clearly see thatshift positioning a swapping files "suction feeling" the effect.