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Slider-crank mechanism is one of the first widely available linkage , inertial forces generated during the operation of each component will cause forced vibration machine seat , increased wear of machine components and noise pollution, reduce and smooth motion accuracy institutions sex . Therefore , the study of such institutions balance is necessary. In theory , the use of mass substitution method enables the inertial force of this organization perfectly balanced . However, this method will result in a balance of mechanical and structural complexity increase the quality , particularly when the counterweight is mounted on the rod, the mechanism is more negative. Therefore , the inertial force people to use more part -balanced approach to reduce the vibration mechanism.
Slider-crank mechanism includes a slider for reciprocating movement and as complex as the rotating rod and equipment condition monitoring and fault diagnosis of major operations crank , they centroid acceleration and angular acceleration will lead to cyclical changes in the presence of vibration force and vibration torque. This will result in mechanical forces and moments of intense vibration and noise , increased wear and fatigue mechanical failure , reducing movement precision and smooth motion mechanism , limiting the improvement of mechanical properties. Vibration force study of sports institutions and vibration torque balance is mainly focused on two aspects : the vibration force and vibration torque balancing methods and analysis methods balance problems.
Currently the machine transmission of slider-crank mechanism vibration force and vibration torque balance method are: ( 1 ) the quality of re- distribution method , this method is applied by the member counterweight approach , bringing the total centroid position institutions always in the frame , not the total body center of mass with the movement of the movement member, so as to achieve complete balance vibrational force ; ( 2 ) balance mechanism balance, i.e., adding another mechanism to balance the inertia of the mechanism of the original bodies. Analysts vibration force and vibration torque balance method are: ( 1 ) quality alternative method is based on the principles of quality and quality of the components before and after the replacement moment invariant mass member on behalf of the mass corresponding point. This approach is conducive to research institutions vibration and vibration moment equilibrium ; ( 2 ) linearly independent vectors method, this method is to first establish institutions overall centroid position vector expression , and then use the agency to make an expression of the vector loop equation linearly independent , the final centroid position is trying to make the total does not move , even though the expression of all the coefficients of all the time-dependent zero .
摘要本文提出了一种可调曲柄滑块机构的运动分析，所提出的机构是由输出件即滑块，通过连接杆和曲柄构成，包括一对相同的齿轮和一个链传动机构组装成一个典型的行星系统。行星齿轮沿外摆线路径移动，其他齿轮保持静止，并且行星臂围绕一个固定的铰链旋转。这样外摆线运动被转换成就像传统的曲柄滑块机构中滑块通过连杆装置做往复运动一样。通过调整整个机构来实现这样一种状态，即保持行星臂固定和修改两个齿轮的相对角位置，这样当整个机构再次运转时，滑块就按照新的运动规律运动。论文网
关键词：可调机构、曲柄滑块机构、可变行程机构
介绍在设计中分析和综合考虑机械结构的功能、路径或运动轨迹是机械工程师的目标之一。许多工业应用中，灵敏性是系统的要求。可编程机器人被用来完成各种不同的动作。但有一个缺点是不太灵活。更简单、更可靠的解决方案是通过可调节的机制来实现不同的动作，基本上这些机制都是单自由度系统，具有一个或几个可调节的参数，这些参数被称为控制输入。