A装配图
投影幕减速定位机构设计
摘要
就目前而言，市场上流行的投影幕结构其实都十分相似，但作用细分起来也有很大差别。通过电脑等外联结操控，可以将画面呈现到投影的幕布之上。投影的布如果与投影机能够合理组合，正确操作，电脑输入信息，能够看到清晰的画面。我们操控电脑，告诉幕布要提升。扭力弹簧就会工作，幕布就能缓缓上升。打开塑料保护壳，我们就能发现，隐藏在里面的是转管，他会转动，然后幕布会绕在转管的上面，幕布就能回收起来。以前，我们使用后的幕布回收的反弹力较大，而且幕布回收的速度相对较快，拉管就会来回荡动，然后狠狠地撞击到仪器的外面壳子。不仅拉管或外壳会有很大概率破损或者开裂。而且幕布受到各角度的力，幕布很容易的就会产生褶皱或弯曲，影响幕布的使用效果。好多使用投影仪的使用者，为了保护幕布，延长机器的使用寿命，大家就会考虑手动来控制速度。这样不仅会给使用仪器的人造成许多麻烦，也影响仪器使用寿命。本次设计属于投影屏幕领域，不改变外观，只在转动的管中加入一些结构，从而达到想要的效果。
关键字：行星齿轮组齿轮固定制动架离心制动机构能自锁的弹簧
Aabstract
At present, the popular projection screen structure in the market isvery similar, but the role of subdivision is alsovery different. Controlled by computer and other external links, the picture can be presented on the projection screen. If the projection of the clothwith the projector reasonable combination, correct operation, computer input information, can see a clear picture. We control the computer and tell the curtain to go up. The torsion springwillwork and the curtainwill rise slowly. Whenwe open the plastic case,we can see that the rotor that's hidden inside, he's going to rotate, and then the curtain is going to bewrapped around the top of the tube, and the curtain is going to be recycled. In the past,whenwe used the curtain, the recoilwas greater, and the curtainwas recovered so quickly that the pull pipewouldvibrate and hit the outer casing of the instrument hard. Not only do pull tubes or shells have a high probability of breakage or cracking. In addition, the curtain is subject to the force ofvarious angles, and the curtainwill easily fold or bend, affecting the effect of the curtain. To protect the curtain and extend the life of the machine, many userswho use projectorswill consider manually controlling the speed. Thiswill not only cause a lot of trouble to the peoplewho use the instrument, but also affect the service life of the instrument. This design belongs to the field of projection screen. It does not change the appearance, but only adds some structures to the rotating tube to achieve the desired effect.
Keyword: Planetary gear set Gears secure the brake rack Centrifugal brake mechanism self-locking spring
目录
摘要……………………………………………………………………3
Aabstract………………………………………………………………4
第1章综述…………………………………………………………5
第2章现状分析……………………………………………………6
第3章结构和工作原理……………………………………………8
第4章结构及装配图设计…………………………………………10
4.1行星轮系机构设计…………………………………………10
4.2行星齿轮传动比计算………………………………………11
4.3行星齿轮传动的几何尺寸和啮合参数计算………………15
4.4行星齿轮传动传动效率计算………………………………17
4.5选择和计算载荷分布不均匀系数KP………………………19
4.6行星齿轮传动的结构设计………………………………20
4.7行星齿轮运动的强/韧度验证………………………………23
4.8自锁弹簧、离心制动机构和棘轮机构结构设计…………26
第6章总结与思想体会……………………………………………30
致谢……………………………………………………………………31
参考文献………………………………………………………………32
齿轮
第二、三组行星轮机构中心轮及行星轮支架
第一组行星轮固定架机构
行星轴及中心轮
减速箱盖
壳体结构
离心制动蹄
密封圈压套
主轴
自锁弹簧及其轴芯结构
目录
设计所包含文件
摘要
字数
