设计描述：

文档包括:
word版设计说明书一份，共73页，约20000字

CAD版本图纸，共9张

毕业设计任务书

毕业设计题目：仓库大门开闭机构设计

毕业设计专题题目：

毕业设计主要内容和要求：
    设计仓库大门，实现两扇门的同步开闭。主要传动形式为链传动，通过电机正反转实现大门的开与闭。在大门的两个极限有行程开关触点，从而可以使大门自动停在固定位置。在停电时能够用手动方式打开。
要求：1.完成零号图纸总计三张
      2.翻译英文文献，译成中文不少于3000字
      3.摘要译成英文，不少于300字
          4.说明书不少于70页

摘  要
    仓库大门主要是为了方便仓库内的贷物进出，为了达到此目的。此次设计中大门为对开式，每扇门宽4米、高6米，重900千克。大门开闭驱动方式为电机驱动，而且两扇门共用一个电机。电机带动一个圆柱直齿三级减速器，在减速器的输出轴上带链轮，大门的伸缩杆卡在链条的卡口内，当链轮转动时带动链运动从而使大门与链同步运动。为了使两个大门能实现同步开闭，在电机的输出轴上还带有一个齿轮，与另一扇门的链轮轴上同尺寸齿轮相啮合，使另一扇门的链轮与电机直接驱动的链轮转速相等而方向相反。门的开与闭由电机正反转控制。当大门开到极限位置时，会将大门导轨上的行程开关触点压开电机停止转动。整个机构中主要涉及的传动方式为链传动。由于每扇大门宽4米所以链传中系统中两个链轮的设计中心距为4.5米，为了防止中心距过大链产生下垂，采用增大中心距的办法对链进行张紧。而链轮轴都采用悬臂梁式轴，一端伸在预埋在墙上的钢板内，在轴表面车螺纹轴用螺母将其固定在钢板上。

关键词：链传动、 链张紧、 三级减速

ABSTRACT

Warehouse door is to facilitate the storage of the loan-to-access, in order to achieve this objective. The design of the off-door, the door of each four meters wide, six meters high, weight 900 kg. Closed the door open for the drive motor drive, and two doors share a motor. A cylindrical motor driven three straight teeth reducer, the output shaft in reducer with sprocket, the expansion-card door to the chain of cards in the mouth, when the rotation when the sprocket chain driven movement so that the door chain synchronization with the movement. In order to achieve the two doors can be opened simultaneously closed, the output shaft in the motor also has a gear, and another door of the same size gear sprocket axis of engagement so that another door of the motor and direct drive sprocket Moving the sprocket and the same speed in opposite directions. The doors opened and closed by the positive and motor control. When the door opened to the limit position, the door will guide the trip switch contact pressure to stop a motor rotation. The main agencies involved in the transmission mode for the chain drive. Since each door four meters wide in the so-linked system of the two sprocket design center distance of 4.5 metres, in order to prevent the center from a drop too much linked with increased distance to the chain tension. The chain axle-shaft cantilever used, in the end stretch of embedded in the wall plate, in the shaft surface car nut threaded shaft with its fixation on the plate.

Keywords：Chain drive、Chain tension、 Three reducer

目    录
1 绪论1
1.1 概述???????????????????????????????????????????????????????????????????????????????????1
1.2 链传动????????????????????????????????????????????????????????????????????????????????1
1.3 齿轮传动?????????????????????????????????????????????????????????????????????????????3
1.3.1 齿轮传动发展趋????????????????????????????????????????????????????????????????3
2 链传动部份的设计?????????????????????????????????????????????????????????????????????5
2.1 链的设计?????????????????????????????????????????????????????????????????????????????5                                                                                           
2.2 滚子链强度校核???????????????????????????????????????????????????????????????????7
3 减速机构的设计????????????????????????????????????????????????????????????????????????8
3.1 电机的选型??????????????????????????????????????????????????????????????????????????8
3.2 传动零件设计???????????????????????????????????????????????????????????????????????9
3.2.1 第一级传动??????????????????????????????????????????????????????????????????????9
3.2.2 第二级传动?????????????????????????????????????????????????????????????????????14
3.2.3 第三级传动?????????????????????????????????????????????????????????????????????19
3.3 轴的计算????????????????????????????????????????????????????????????????????????????24
3.3.1 高速轴????????????????????????????????????????????????????????????????????????????24
3.3.2 中间轴???????????????????????????????????????????????????????????????????????????28
3.3.3 中间轴???????????????????????????????????????????????????????????????????????????32
3.3.4 输出轴???????????????????????????????????????????????????????????????????????????36
3.4 滚动轴承的选择和计算????????????????????????????????????????????????????????40
3.5 键连接的计算?????????????????????????????????????????????????????????????????????43
3.6 减速器的润滑和密封形式?????????????????????????????????????????????????????45
3.7 减速器箱体、附件设计?????????????????????????????????????????????????????????47
3.8 出厂检验与试验??????????????????????????????????????????????????????????????????49
3.9 储运、安装、试动转、维护???????????????????????????????????????????????????51
3.10 试运转?????????????????????????????????????????????????????????????????????????????52
3.11 使用维护??????????????????????????????????????????????????????????????????????????53
4 链轮的具体尺寸设计???????????????????????????????????????????????????????????????54
4.1 整体尺寸???????????????????????????????????????????????????????????????????????????54
4.2 轴向齿廓及尺寸??????????????????????????????????????????????????????????????????55
5 链轮轴的设计与布置????????????????????????????????????????????????????????????????56
5.1 链条的竖直张紧与轴的设计??????????????????????????????????????????????????56
5.2 链轮的水平张紧与轴的设计??????????????????????????????????????????????????58
5.3 大门2的主动轮布置????????????????????????????????????????????????????????????59
结论??????????????????????????????????????????????????????????????????????????????????????????????61
参考文献??????????????????????????????????????????????????????????????????????????????????????62
翻译部分
英文原文??????????????????????????????????????????????????????????????????????????????64
中文译文??????????????????????????????????????????????????????????????????????????????69
致谢??????????????????????????????????????????????????????????????????????????????????????????????73