Younger brother, I now ride the mountain bike is 21 speed, uphill ride, most of the road in front of small cap [24T], behind the flywheel [24T], barely can ride up, and occasionally after the use of 34T. Now I want to change the sramx7 10 Speed kit, but I don't know whether it will be on the 20 speed or the 30 speed I don't know. 20 speed front small 28T, with flywheel 36T climbing, and now 21 speed, front small 24T with flywheel 24T which is easier?
Combining the advantages of both CATIA and ADAMS, 3D modeling using CATIA reducer, it is put into the ADAMS virtual simulation analysis by SimDesigner to get the reliable data, provide the basis for the optimization design of gear reducer. 1 virtual prototype modeling the parametric modeling of 1.1 helical gears, the model of helical gear should be established, the key is to determine the involute and spiral of gear, and to use parametric and formula to describe parametric design as much as possible. First (FX) set the following parameters: ` ` ` modulus calculation method, method of addendum coefficient of ` ` ` deformation coefficient of type rea (L, real); ` tooth number z`, type integer (integer); ` ` ` pressure angle, helix angle, and type angle (angle); ` ` ` ` tooth height, pitch, type length (length), and according to the nature of the specific numerical input gear. Then set the parameters as follows: ` pitch radius `, ` ` the radius of base circle radius of addendum, ` `, ` ` root diameter, type length (length), and enter the following formula: 'the pitch radius `=` modulus `*` tooth number z`/2/cos beta *1mm` radius `=` pitch radius `*co (s` the pressure angle of ` `) radius of addendum `=` pitch radius `+` modulus method `*` addendum coefficient `*cos beta *1mm+` `*1mm` `*` modulus deformation coefficient of tooth root radius `=` tip radius `-` tooth pitch `=2*PI*` ` ` pitch radius r`/tan (` ` spiral angle) to draw involute, the need to determine the coordinate equation involute.
Keywords: virtual prototype; two helical gear reducer; CATIA; SimDesigner; ADAMS reducer is applied to a kind of transmission device to reduce speed and increase torque of the work on the prime mover and work machine, is widely used in various types of machinery, has a very important position in the machinery manufacturing industry. In order to improve the design efficiency and ensure the smooth operation of the reducer, it is necessary to model and analyze the dynamics of the reducer. CATIA IBM of the United States and the French Dassault (Dassault System) the development of a good 3D design software, its powerful function of surface design make it become the vehicles, ships and aerospace and other fields of the mainstream CAD software parametric design good design also makes the job easier. ADAMS is a dynamic simulation analysis software developed by American MSC company. It can analyze the statics, kinematics and dynamics of the virtual prototype. SimDesigner is a data interface between CATIA and ADAMS developed by MSC company, which can realize seamless connection between the two.
I think the speed reducer CATIA and ADAMS two stage helical gear based on Virtual Prototype Modeling and dynamic simulation of the three-dimensional model using CATIA 3D modeling software to create two helical gear reducer, through the SimDesigner conversion of the model, and realize the seamless connection of ADAMS dynamic mechanical simulation software, a virtual prototype model in ADAMS and the dynamic simulation of the gear, the rotation speed of the shaft and gear meshing force between the comparison and analysis, to obtain reliable results
