三曲柄的

The third is lubricous degree, symmetry and unsymmetry of knee and ankle joint track.

摘 要：在次最大强度下改变骑行变量坐角与坐高，结果表明：恢复阶段的曲柄角速度及膝、踝关节轨迹特征的理论论证与实际结果具有很好的一致性；参与本次实验的自行车运动员坐角不应小于72°、坐高不低于106%th的定位较为合理；初步确认了踏蹬技术的三种运动学诊断指标即提拉阶段的曲柄角速度、不同组合下踏蹬时上、下死点区域的大小，膝、踝关节中心轨迹的重叠程度、光滑程度、对称性与非对称性。

Once more, applys three-dimensional CAD software Pro/Engineer establishing the geometry models of all kinds of parts in the crank link mechanism, then useing the Pro/E software assembling function assembles the components of crank link into the piston module, the connecting rod module and the crank module, then using Pro/E software mechanism analysis module (Pro/Mechanism), establishes the multi-rigid dynamics model of the crank link, and carries on the kinematics analysis and the dynamics analysis simulation, and it studies the piston and the connecting rod movement rule as well as crank link motion gear movement envelopment. The analysis of simulation results shows that those simulation results are meet to true working state of engine.

再次，应用三维CAD软件：Pro/Engineer建立了曲柄连杆机构各零部件的几何模型，在此工作的基础上，利用Pro/E软件的装配功能，将曲柄连杆机构的各组成零件装配成活塞组件、连杆组件和曲轴组件，然后利用Pro/E软件的机构分析模块(Pro/Mechanism)，建立曲柄连杆机构的多刚体动力学模型，进行运动学分析和动力学分析模拟，研究了在不考虑外力作用并使曲轴保持匀速转动的情况下，活塞和连杆的运动规律以及曲柄连杆机构的运动包络。

After the force alalyses, the Parametric optimization design for the designed reducer is carried out.

在准确受力分析的基础上，对三齿轮联动双曲柄四环板式针摆行星传动进行了参数优化设计。

Another consideration is to buy a sports bike with a road racing frame and provision for triple cranks.

另一个要考虑的是购买运动自行车公路赛的框架，并提供三重曲柄。

Currently, the crank-guide triplex single-acting piston pumps have been difficult to fulfill the requirements of drilling technology.

现用的曲柄连杆式三缸单作用活塞式钻井泵已经很难满足钻井工艺的要求。

Two-degree-of-freedom parallel mechanism is dealt with by the definition of topo...

并对上述三种机构的类型进行了分析，同时给出 5R、4RP 机构存在曲柄的充要条件。

Taking crank slider mechanism as an exampl, the dynamic effects of clearance in tripod ball sliding joint has been considered.

以曲柄滑块机构为例，考虑三球销滑动副间隙对机构动力学特性的影响。

Then the numerical simulation is developed with the above dynamic model. The effects of the clearance on the dynamic characteristics are studied in detail. The influence of factors such as clearance size, driving speed, stiffness, coefficient of viscous damping of contact surface, and the gravity are discussed and the quantitative results are given.

利用本文建立的动力学模型对含间隙三球销移动副的曲柄滑块机构进行了动力学数值仿真，研究了运动副间隙对机构的运动和受力状况的影响，考察了间隙大小、曲柄转速、接触刚度、阻尼、外力矩等对机构动态特性的影响规律，给出了定量结果。

Theory basis provided to solve the problem of vibrationof the universl coupling of three-crank type and to increase the transmission of the universalcoupling of three-crank type.

由于三曲柄式万向联轴器的输人构件上各曲柄杆的轴线分别与输出构件上相应的导向滚道槽轴线相交，所以可根据其相交条件分析其运动关系。图1和图2分别表示三个曲柄杆及三条导向滚道槽轴线在图中所建立的坐标系中的位置tl。

This paper analyses the dwell kinematic and dynamic characteristics of a common used tri-geared crank-and rocker mechanism, offers the characteristic curves of the mechanism, and makes it convenient for analyzing and synthesising the mechanism.

本文对常用的三齿轮一曲柄摇杆机构的间歇运动特性及动力特性进行了分析研究，给出了机构的特性曲线图，为分析与综合这类机构提供了方便。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。