【作者】 刘磊；

【导师】 俞亚新；

【作者基本信息】 浙江理工大学 ， 机械工程， 2015， 硕士

【摘要】 在摩托车制动系统中,刹车片起着非常重要的作用。刹车片包括制动衬铁和刹车皮,刹车皮俗称为制动器衬皮。在摩托车刹车片加工成型的后期需要将刹车皮与制动衬铁胶合成一体,并维持刹车皮上一定的预紧力的同时在200℃以上的高温中保温一定的时间。为产生该预紧力,现在广泛使用的夹具是一种齿轮齿条机构。该机构虽然具有结构简单,精度高等优点,但是由于没有考虑夹具受保温箱中高温的影响,齿轮齿条机构会发生的形变,从而使得实际上夹紧行程每次都会大于松开行程,经过不断积累,最后会使刹车片所受夹紧力变大,并且松开行程不够,而致使刹车片不能松开。本文针对这一问题,考虑到高温对夹紧机构产生的影响,然后采用热-结构耦合的分析方法进行校核,设计了一种凸轮滑块的夹紧机构。主要研究内容如下:(1)查阅了国内外关于夹紧机构的相关研究文献,提出了一种凸轮滑块的摩托车刹车片夹紧机构;(2)完成了凸轮滑块夹紧机构的机械结构设计及其相关计算,重点对夹紧机构的传动系统、凸轮轮廓、楔块形状进行了设计;(3)利用Pro/E对夹紧机构进行了三维建模,并利用ADAMS对夹紧机构进行仿真分析研究;(4)夹紧机构热-结构耦合分析。通过ANSYS软件利用热-结构耦合分析法研究在温度场和应力场共同作用下刹车片所受夹紧力的变化。从而为夹紧机构进行进一步的优化设计提供了可行性支持。更多还原

【Abstract】 Brake block plays a rather important role in the brake system of motor bicycle. A whole set of brake block contains braking leather and brake pad which is usually called braking lining leather. In the latter machining process of the brakes block of motor bicycle, braking leather needs to be glued with the braking pad, and imposed on with a preload at a high temperature above 200℃ for a certain period of time. To get that preload, nowadays, the clamping apparatus in wide use is a kind of rack and pinion mechanism which has an advantage of simple structure and high transmission accuracy. However, because of ignoring the effect of high temperature in insulated cabinet on the clamping apparatus, the occurrence of deformation of rack and pinion mechanism is unavoidable, actually making the clamping stroke greater than the loosen stroke every time. After continuous accumulation, braking block suffers from a larger clamping force and a shorter loosen stroke, and as a result, braking block can not be loosen.To solve this problem, the effect of high temperature on the clamping mechanism is taken into the account. Based on the Thermal-Structure coupling analysis method, a new kind of cam-slider clamping mechanism is designed. Main study and research are as followed:(1)A kind of cam-slider clamping mechanism of motorcycle brakes is proposed, which can get away with the influence of high temperature in the insulated cabinet.(2)Mechanical design and related calculations of the cam-slider clamping mechanism is completed, and a focus is put on the design of transmission system of the clamping mechanism,the profile of the cam and the shape of the wedge.(3)Pro/E is used to conduct a three-dimensional modeling of the clamping mechanism.Through virtual prototyping software ADAMS, simulation analysis on the clamping mechanism is conducted to verify the usefulness of the design scheme of the clamping mechanism;(4)The Thermal-Structure coupling analysis of the clamping mechanism is studied.Through ANSYS, the variation of the clamping force of the brake block in the interaction of the temperature and stress field is studied with the method of thermal- structure coupling analysis,to provide support for the feasibility of the further optimization of clamping apparatus.更多还原