another moving unit by the applied pressure, impact, and shearing or combine action on them. 
They are available in various sizes and capacities ranging from 0.3 ton/hr to 50 ton/hr. They are
classified based on different factors like product  size and mechanism used. Based on the
mechanism used crushers are of three types namely Cone crusher, Jaw crusher and Impact
crusher. 
 
Fracture occurs in the feed material when the strain developed in it due to sufficiently applied
impact forces, pressure or shearing effect exceeds  the elastic limit .Generally crushers are very
rugged, massive and heavy in design.  The contact surfaces are equipped with replaceable liners
made from high tensile manganese or other alloy steel sheet having either flat or corrugated
surfaces. Shearing pins or nest in heavy coiled springs are provided in the crusher to guard against
shock and over load.
 
A crusher may be considered as primary, secondary or fine crusher depending on the size
reduction factor. a)  Primary crusher – The raw material from mines is processed first in primary crushers..
The input of such crushers is relatively wider and the output products are coarser in size.
Example - Jaw crusher, Gyratory crusher.
b)  Secondary crusher- The crushed rocks from primary crusher are sent to secondary crusher
for further size reduction. Example - Cone crusher, reduction gyratory crusher, spring
rolls, disk crushers etc.
c)  Fine crushers- Fine crushers have relatively small openings, and are used to crush the feed
material into more uniform and finer product. Example - Gravity stamp.
 
The material to be crushed is dropped between two rigid pieces of metal, one of which then move
inwards towards the rock, and the rock is crushed as it has a lower breaking point than the
opposing metal piece. Jaw crusher movement is guided by pivoting one end of the swinging jaw.
and an eccentric motion located at the opposite end. [4] The size of a jaw crusher is designated by
the rectangular or square opening at the top of the jaws .For instance, a 22 x 30 jaw crusher has an
opening of 22" by 30", a 46 x 46 jaw crusher has a opening of 46" square. Generally primary jaw
crushers have the square opening design, and secondary jaw crushers have rectangular opening
design. Jaw crushers are used as primary crushers in a mine or ore processing plant or the first
step in the process of reducing rock. They follow “crush using compression” mechanism. 
 Abstract-Pro /工程师是一个参数化特征设计的3 d软件,用参数化建模功能。减少开发周期,提高设计质量,颚式破碎机,本文充分利用Pro / E的功能模块
关键词-。颚式破碎机;机制;Pro /工程师模拟;运动学分析23569
1.介绍
颚式破碎机是一种重要的破碎设备生产加工,由于其结构简单、可靠、易于制造和文护、适应性等等。论文网而被广泛应用于各种矿石和散装材料的破碎工作在矿山、冶炼、建材、公路、铁路、水利和化工等行业。 颚式破碎机的英文参考文献和翻译(3):http://www.youerw.com/fanyi/lunwen_16700.html