promote the extension of strictly administering the party grass-roots, but also the educational practice of the mass line of the party and "three-three" special education results achieved further inherited and expanded. o realize "two a" learning education is a necessary solution to the present problems of party construction. Strengthen problem consciousness and insisted on problem-oriented, is full of strictly administering the party since the party's 18 a distinctive feature, a successful experience. Secretary Wang noted that some party members still have political awareness, lack of political responsibility issues, party awareness and consciousness of the problem belief does not really believe, slim does not actually fix problems, outspoken, and jump on the assessment of the party's policies, and so on. Bi Lifu Secretary pointed out that a quarter of the economic situation is very serious, there is pressure on environment, seasonal factors and other objective reasons, but mainly subjectiveproblem, is the problem of party members and cadres. Some depressed, negative slack, not responsible, ... Double six, one, and two took the lead, build energy burst, Hongshan district, economic prosperity, eco-livable, civilized and harmonious island. It certainly can not be separated from the whole area 646 grass-roots party organizations and 14,146 members of broad participation and support. Through the "two" study and education, so that every cell of the party health, every organization is strong, so that all members of the vanguard and exemplary role, all the fighting bastion role of grass-roots party organizations into full play so that we can cross the Rapids, overcome all difficulties and the smooth realization of the "Thirteen-Five" goal. Second, basic learning, focus on learning education must understand the learning content and learning styles "Foundation learning" these four words are important information inside is very large, capture profound work truth in life. For example,
1．凸缘联轴器，用六个普通螺栓联接，螺栓分布在mmD100的圆周上，接合面摩擦系数f=0.16，防滑系数1.2f，若联轴器传递扭矩为mN.150，试求螺栓螺纹小径。（螺栓MPa120）。
解： TKrfFfzii10
NrfTKFf3750)506(16.0101502.1)6(30
mmFd19.712037502.5][2.501
结论 取M10的螺栓
2．图示刚性联轴器，螺栓孔分布圆直径mmD160，其传递的扭矩mNT.1200，若使用16M的普通螺栓（螺纹内径mmd84.131），被联接件接合面的摩擦系数25.0f，防滑系数2.1f，螺栓材料的许用应力MPa80，问至少需要多少个螺栓才能满足联接的要求？
解：
强度条件：
302211332211.341.3240010[][]/441.324001041.31.22400107.77[]13.840.2516080ssFKddfzDKzdfD
至少需8个螺栓
3.已知气缸的工作总压力Q=29000N，螺栓材料为35号钢，许用应力[σ]=150N/mm2,螺栓个数Z = 8,剩余预紧力F'0=1.5 F, 试设计气缸盖螺栓联接。
公称直径d(mm) 大径d(mm) 中径d2(mm) 小径d1(mm)
6 6 5.350 4.917
8 8 7.188 6.647
10 10 9.026 8.376
12 12 10.863 10.106
16 16 14.701 13.835
20 20 18.376 17.294
mmdddFNFFFNFFNZQF000121999.101505.906243.1][43.15.90625.543736255.543736255.15.136258290001212100
.
1 / 21 第一章 机械设计基础概论
[复习题]
一、单项选择题
1．机器中各制造单元称为〔
A．零件 B．构件
C．机构 D．部件
2．机器中各运动单元称为〔
A．零件 B．部件
C．机构 D．构件
3．在卷扬机传动示意图中,
序号5、6所示部分属于〔
A.动力部分 B.传动部分
C.控制部分 D.工作部分
4．如图为卷扬机传动示意图,图中序号3
所示部分属于< >
A.动力部分
B.传动部分
C.控制部分
D.工作部分
5．在如图所示的单缸四冲程内燃机中,序号1和10的组合是〔
6．如图所示,内燃机连杆中的连杆体1是〔
A.机构
B.零件
C.部件
D.构件
7．在如图所示的齿轮—凸轮轴系中,
轴4称为< >
A.零件
B.机构
C.构件
D.部件
[参考答案]
一、单项选择题 .
2 / 21 1A,2D,3D,4B,5B,6B,7A
第二章 平面机构运动简图及自由度
[复习题]
一、单项选择题
1．在平面机构中,每增加一个高副将引入〔
A．0个约束 B．1个约束 C．2个约束 D．3个约束
2．在平面机构中,每增加一个低副将引入〔
A．0个约束 B．1个约束 C．2个约束 D．3个约束
3．平面运动副所提供的约束为〔
A.1 B.2 C.1或2 D.3
4．平面运动副的最大约束数为〔
A．1 B．2 C．3 D．5
第 1 页 共 28 页
答案参见我的新浪博客：/s/blog_3fb788630100muda.html
第一章 平面机构的自由度和速度分析
题1-1 在图示偏心轮机构中，1为机架，2为偏心轮，3为滑块，4为摆轮。试绘制该机构的运动简图，并计算其自由度。
题1—2 图示为冲床刀架机构，当偏心轮1绕固定中心A转动时，构件2绕活动中心C摆动，同时带动刀架3上下移动。B点为偏心轮的几何中心，构件4为机架。试绘制该机构的机构运动简图，并计算其自由度。
A B
C 1 2
3
4
a) 曲柄摇块机构 A B
C 1 2 3
4
b) 摆动导杆机构
题解1－1 图 第 2 页 共 28 页
答案参见我的新浪博客：/s/blog_3fb788630100muda.html
题1—3 计算题1－3图a）与 图b）所示机构的自由度（若有复合铰链，局部自由度或虚约束应明确指出）。
题1－3图a） 题1－3图b）
题1—4 计算题1—4图a、图b所示机构的自由度（若有复合铰链，局部自由度或虚约束应明确指出），并判断机构的运动是否确定，图中画有箭头的构件为原动件。
题1—5 计算题1—5图所示机构的自由度（若有复合铰链，局部自由度或虚约束应明确指出）,并标出原动件。
第 3 页 共 28 页
答案参见我的新浪博客：/s/blog_3fb788630100muda.html
题1—5图 题解1—5图
题1-6 求出图示的各四杆机构在图示位置时的全部瞬心。
第二章 连杆机构
题2-1在图示铰链四杆机构中，已知 lBC=100mm，lCD=70mm，lAD=60mm，AD为机架。试问：
