Optimizing Design Of Excavator Backhoe Working Device And Machine Stability Analysis

Backhoe working device is one of the main functional units of excavator. The structure design of backhoe working device affects the performance and working sta-bility of excavator directly. Backhoe working device which has large working range and working force is the key component affecting the stability of the excavator. And the stability of excavator limits the working force of the device. The interacting between them made the traditional design method inefficient for extensive repeated calculation. Therefore, it is necessary to study efficient methods for optimizing design of working device and machine stability analysis. This paper focus on optimizing design of exca-vator backhoe working device and machine stability analysis.Optimization of backhoe working device is vital to improve the whole machine’s working property and efficiency. Static analysis of excavator backhoe working device has been done at first, then the D-H transformation matrix and virtual prototyping tech-nology was applied for kinematic analysis. MATLAB and ADAMS was used to calcu-late the force of each hinge point to ensure the accuracy of the virtual prototype. The results show that the virtual prototype model meets the requirements.Secondly, researching on optimization design methods of backhoe working device was done as to the problem that current backhoe working device cannot meet the oper-ating requirements, The working device was simplified into two groups:bucket mech-anism and boom arm mechanism, and optimized the bucket mechanism at first. Then the boom arm mechanism was optimized under bucket mechanism to achieve overall optimization of the device. The overall performance of the optimal model is better than the old design.Then, calculation methods for excavator stability analysis, especially for wheel excavator was studied, tipping stability factors was calculated by using ADAMS. The new method which can display the stability change of excavator during its working progress dynamically for stability analysis by using ADAMS software was proposed. The new method is more efficient and feasible. Finally, aiming at the problem that stability analysis involves amounts of mathe-matical modeling and mathematical analysis, the excavator performance and stability analysis software is developed by using the CMD language of ADAMS software. The software could offer enterprise designers rapid stability analysis method of excavator, make their design work simple and shorten trial production cycle effectively.