After completing the virtual assembly of hypoid gear pair, enter the simulation analysis module Pro / mechanism to set relevant parameters to complete the establishment of motion model of hypoid gear pair simulation mechanism.
1. Parameter introduction of simulation model
The setting of simulation parameters is directly related to the simulation results. The meshing condition of hypoid gear pair is complex, so a large number of parameters are required, which can be divided into the following categories: model geometric parameters, operating environment parameters, overall technical parameters, mass characteristic parameters, mechanical characteristic parameters (stiffness, damping and other characteristics).
In the process of mechanism motion model simulation, the motion model itself has the characteristic parameters such as mass, center of gravity and moment of inertia, which have a decisive impact on the simulation results. The mass characteristic parameters of each moving part in the mechanism, such as center of gravity and moment of inertia, depend on the reference coordinate system selected by the simulation model.
2. Establishment of motion model of hypoid gear pair
The establishment of motion simulation model must connect each component of the mechanism with various constraints in the “predefined connection set” given in advance by the Pro / mechanism module of Pro / E software, so that the component can move or rotate in a certain direction in the assembly mechanism to complete the simulation. Constraint refers to the relative restriction of motion between components in the mechanism. The constraint relationship between components is also known as hinge or kinematic pair.
To simulate the real motion of the whole mechanism, the corresponding motion pairs must be abstracted and added to the mechanism to complete the motion model. In the process of simulation, the motion of components is interrelated and restricted each other. In the motion model of hypoid gear mechanism pair, the motion pair between two gears is defined as hypoid gear connection, the pinion shaft is defined as the motion shaft, and the big gear shaft is defined as the driven shaft. In addition, the operation of the simulation mechanism depends on the drive and load.
Adding drive is to control the remaining degrees of freedom on the basis that the motion pair has constrained some degrees of freedom to make the system move according to the required state. In the Pro / E simulation module, the drive can be added on the kinematic pair or between two points of different components. Pro / E software automatically adopts speed to drive, and the driving displacement and acceleration can be selected according to different simulation conditions. The design is the simulation of hypoid gear pair mechanism. The servo motor is added to the driving hypoid gear pair to meet the needs of mechanism operation. In Pro / mechanism, loads are mainly divided into external loads, i.e. force, moment and gravity. Internal loads mainly refer to some flexible connection relations between components and special loads, such as friction on contact and constraint.