20马力轮式拖拉机的半轴与制动器设计【优秀含6张CAD图纸+Word全套车辆类毕业设计】

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20马力轮式拖拉机的半轴与制动器设计（有cad图等）.doc

摘要 .doc

偏心轴.dwg

全套图纸6张.dwg

制动凸轮.dwg

制动蹄.dwg

制动蹄总成.dwg

制动鼓.dwg

半轴.dwg

操纵机构.dwg

翻译

20马力轮式拖拉机的半轴与制动器设计

摘  要

随着我国农业经济的发展，国内市场对拖拉机的需求不断增长，结合我国实情出发，特别是对中小型马力拖拉机的需求量更大。

本次设计是在吸收成熟产品优点的基础上优化设计处出半轴与制动器，拖拉机的制动装置分行车制动装置和驻车制动装置。行车制动装置使行驶中的拖拉机强制减速或停车，并使拖拉机在下短坡时保持适当的稳定速度；驻车制动装置使拖拉机能够在斜坡上停车并长时间保持稳定状态，它也有助于拖拉机在坡路上起步。制动器有盘式和鼓式之分。制动器的布置方式分半轴制动和轮边制动。制动器的驱动方式有液压驱动和机械驱动。此设计结合现有的中小型拖机，采用行车制动和驻车制动为一体，操纵机构为机械制动，制动器布置在轮边的鼓式制动器。半轴采用半浮式。

关键词：行车制动，驻车制动，制动力矩，制动蹄，制动鼓，摩擦衬片

20 horsepower wheeled tractor rear axles and brake design

ABSTRACT

Along with our country agricultural economy development , the domesticmarket unceasingly grows to the tractor demand, unifies our country agriculture truth to embark , is specially bigger to the middle and small scale tractor demand quantity 。

This design is optimizes in the absorption mature product meritfoundation designs axles has the driving arresting gear and in thevehicle arresting gear with the brake tractor arresting gear .The driving arresting gear causes in the travel the tractor to decelerateor to stop; Applies the brake in the vehicle to enable the tractor tostop and the long time in the pitch maintains the steady state.The brake has the drum type and the disc type division .The brake arrangement way has axles applies the brake with nearby turn to applythe brake, the brake drive type has the hydraulic pressure actuationand the machinery actuates. This design union existing middle andsmall scale tractorbrake installs the structure and the type, and theconsult correlation data carries on the optimized design, uses thedriving to apply the brake with to apply the brake in the vehicle is abody , The control mechanism machinery applies the brake the way. Thebrake arrangement the drum type brake which applies the brake nearbythe wheel. axles uses the semisubmersible type.

Key word:   The driving applies the brake, applies the brake in thevehicle, brake drum, brakeshoe

目 录

第一章  前 言…………………………………………………………………1

第二章 概述 …………………………………………………………3

§2.1制动系的功用和组成…………………………………………3

§2.2 制动器的工作情况.………………………………………………3

§2.3 制动器的设计要求………………………………………………4

§2.4制动力矩的确定………………………………………………6

  §2.4.1制动器的结构…………………………………………………6

§2.4.2拖拉机的结构参数…………………………………………7

§2.4.3 制动器的结构参数……………………………………….8

§2.4.4 制动器的力矩计算………………………………………10

第三章 制动蹄片上的制动力和踏板力的计算 ……………………………13

§3.1 制动蹄摩擦面的压力分布规律及径向变形规律………………13

§3.2 制动力的计算……………………………………………………15

§3.3制动器因数与制动蹄因数…………………………………………19

§3.3.1 制动器因数…………………………………………………19

§3.3.2 制动蹄因数…………………………………………………19

§3.4 踏板力的计算……………………………………………25

第四章 半轴的计算和弹簧结构的计算……………………………………28

§4.1 半轴的计算……………………………………………………28

§4.2 弹簧结构的主要几何参数………………………………………30

第五章  结 论…………………………………………………………………32

参考文献………………………………………………………………………33

致  谢 ………………………………………………………………………34