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摘 要
随着现代工业的发展,机械化和自动化水平的不断提高,各工业部门需要大量减速器,并要求减速器的体积小、重量轻、传动比大、效率高、承载能力大、运转可靠以及寿命长等。减速器的种类虽然很多,但普通的圆柱齿轮减速器的体积大、结构笨重;普通的蜗轮减速器在大传动比时,效率较低;摆线针轮减速器虽能满足以上提出的要求,但其成本高,需要专用设备制造;而少齿差行星减速器不但基本上能满足以上提出的要求,并可用通用刀具在插齿机上加工,因而成本较低。
本次设计在洗衣机中使用行星轮系减速器正是利用了行星齿轮传动:体积小,质量小,结构紧凑,承载能力大;传动效率高;传动比较大;运动平稳、抗冲击和震动的能力较强、噪声低的特点。行星轮减速其实就是齿轮减速的原理,它有一个轴线位置固定的齿轮叫中心轮或太阳轮,在太阳轮边上有轴线变动的齿轮,即既作自转又作公转的齿轮叫行星轮,行星轮有支持构件叫行星架,通过行星架将动力传到轴上,再传给其它齿轮.它们由一组若干个齿轮组成一个轮系.只有一个原动件,这种周转轮系称为行星轮系.
设计内容主要是了解行星齿轮减速器发展;利用所学知识对其分析与研究,使学生能充分了解和掌握工具书使用、设计方法和步骤。了解国内外自动洗衣机行星齿轮减速器发展动态;自动洗衣机回转系统方案设计;行星齿轮减速器结构设计;回转机构设计计算等。
关键词:洗衣机;行星齿轮;减速器;回转系统;CAD
Absrtact
With the development of modern industry and the continuous improvement of mechanization and automation level,various industrial departments need a large number of reducers,and require that the reducer is small in size,light in weight,large in transmission ratio,high in efficiency,large in carrying capacity,reliable in operation and long in life. Although there are many kinds of reducers,the common cylindrical gear reducers are large in size and bulky in structure;the common worm gear reducers have low efficiency when the transmission ratio is large;the cycloidal needle-wheel reducers can meet the above requirements,but their cost is high and need special equipment to manufacture;and the planetary reducers with less tooth difference can not only basically meet the above requirements,but also can be used by universal cutting tools in gear inserts machine processing,so the cost is lower.
This design in the washing machine using planetary gear reducer is the use of planetary gear transmission: small size,small mass,compact structure,large bearing capacity;high transmission efficiency;relatively large transmission;smooth movement,strong ability to resist impact and vibration,low noise characteristics. The planetary gear deceleration is actually the principle of gear deceleration. It has a gear with fixed axis position called the central wheel or the sun wheel. It has a gear with change on the edge of the sun wheel,that is,the gear with both rotation and rotation is called the planetary wheel,and the planetary wheel has a supporting component called the planetary rack,through which the power is transmitted to the shaft and then to it It’s a gear. they consist of a set of several gears to form a gear train. There is only one prime mover,and this revolving gear train is called a planetary gear train.
The design content is mainly to understand the development of planetary gear reducer;to use the knowledge learned to analyze and study it,so that students can fully understand and master the use of reference books,design methods and steps. Understand the development of automatic washing machine planetary gear reducer at home and abroad;automatic washing machine rotary system scheme design;planetary gear reducer structure design;rotary mechanism design calculation.
Keywords:washing machine;planetary gear;reducer;rotary system;CAD
目 录
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