机械设计课程设计报告..docxVIP

机械设计课程设计报告指导教师 陆春晖 专业 机械工程及自动化 姓名 刘丹 学号 1061010502工作条件：单向运转，有轻微振动，经常满载，空载起动，单班制工作，使用期限10年，输送带速度容许误差正负5% 原始数据：输送带拉力F=900N 输送带速度V=1.2M/s滚筒直径D=360mm设计工作量：1.设计说明书一份 2.减速器装配图1张 3.减速器零件图2张摘 要齿轮箱作为一种基础设备，被广泛应用，其性能优劣直接影响着机械设备的运行状况。而目前许多工厂尚不具备制造高精度齿轮箱的加工设备。另一方面，再好的设备加工出的零件也存在误差，其累积误差仍会影响齿轮箱装配后的传动性能。本文提出的无侧隙传动技术，从新的角度提出了在设备条件不足的情况下，利用主副齿轮来实现飞剪机的无侧隙传动。“零侧间隙啮合”是：在尽量周到地考虑飞剪机工作条件下，将齿轮加工成在某一特定状态（例如温度，轴承游隙等）为“零侧间隙啮合”，事实上并非没有侧隙,只能说齿轮啮合的齿侧间隙是很小的。常消除齿隙有很多方法，如提高加工精度，利用圆锥齿轮，四个齿轮串联布置机构，利用主副齿轮。本设计就是采用主副齿轮。在某些飞剪机上，为了改善上下滚筒同步齿轮的工作性能，被动轴上的齿轮往往采用主副齿轮结构，以便齿轮在无侧隙情况下工作，减少和消除冲击负荷。利用主副齿轮则能有效消除齿侧间隙，并且在减速器突然制动时，仍然能实现无间隙传动。关键词: 飞剪机；减速器；间隙；主副齿轮AbstractReducer is widely used as a basic facility. It’s performance which is excellent or inferior has an impact on the running state of the mechanical equipment. But many factories don’t have machining equipment for manufacturing high-precision reducer at present . On the other hand, even though the part is manufactured by the best equipment, it also has error. And their accumulative errors still affect on the transmission performance of reducer after assembled.No lateral gap technology in this article put forward using main-second gear to achieve no lateral gap transmission of the flying shears at the state of having no adequate equipment by a new way. “No lateral gap ingear” is processing gear to a particular state(such as temperature, bearing clearance, etc.),considering the working conditions as much as possible. But in fact,it’s impossible that the gears have no lateral gap.The laterl gap of the gear is very small. Usually there are many ways to eliminate lateral gap,such as improving the processing accuracy,using bevel gear, using four tandem gears and using main-second gear.This design has used the main-second gear. In some flying shears the running performance of the top and bottom selsyn roller usually can be improved by using main-second gear on the gear of the driven shaft.It can make the gear working at no lateral gap and eliminate shock load.