以过约束空间机构构造的汽车侧门锁变模式电动开启支链  

Variable Mode Power Release Branch Chain of Vehicle Side Door Latch Constructed with Over-constrained Spatial Mechanism

作　　者：曲志洋 杭鲁滨 钟传磊 QU Zhiyang;HANG Lubin;ZHONG Chuanlei(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;Shanghai Collaborative Innovation Center of Intelligent Manufacturing Robot Technology for Large Components,Shanghai 201620,China)

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海201620 [2]上海市大型构件智能制造机器人技术协同创新中心,上海201620

出　　处：《机械科学与技术》2023年第8期1221-1228,共8页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51475050);上海市大型构件智能制造机器人技术协同创新中心开放基金项目(ZXY20211101)。

摘　　要：面向汽车侧门锁轻量化及空间有效利用的需求,基于方位特征集提出一种空间过约束机构构型方案,对其拓扑结构及尺度约束类型进行机构解耦特征综合,构造两簇互相垂直的旋转副({R_(A)||R_(B)||R_(F)⊥R_(E)||R_(C)||R_(D)});对空间解耦过约束机构尺度特征进行优化,综合出可用于车门锁电动开启的空间RRURR解耦少杆过约束机构;在此基础上增设由滑槽与扭簧组合的柔顺副,构建具有柔顺性的单回路变模式空间RRUPRR机构。其不同驱动模式、限位边界可实现多种运动模式及其模式切换,包括空间6R过约束机构运动、空间5R1P机构运动和平面3R1P四杆机构运动模式。将柔顺单回路变模式机构嵌入车门锁电动开启支链,实现了电动开启、手动开启等功能;动力学仿真得到手动开启工况中齿轮曲柄仅发生0.042°的微小转动角度,验证了电动开启支链与手动开启支链的运动兼容。To meet the requirements of a lightweight vehicle side door latch and its effective space utilization,the configuration scheme of its over-constrainedspatial mechanism is proposed based on its position and orientation characteristics.The mechanismsfor decoupling feature synthesis are carried out for its topology and dimensional constraint types,and two clusters of mutually perpendicular rotational pairs are constructed({R_(A)||R_(B)||R_(F)⊥R_(E)||R_(C)||R_(D)}).The dimensional characteristics of the decoupled over-constrainedspatial mechanisms are optimized,and the RRURR decoupled over-constrainedspatial mechanism which can be used for power release of the vehicle door latch is synthesized.The compliant pair composed of a groove and a compliant torsion spring is added to construct a compliant single-loop and variable-mode RRUPRR spatialmechanism.Its different driving modes and limited boundaries can realize a variety of motion modes andswitch modes,including the 6R overconstrainedspatial mechanism motion mode,the 5R1P spatialmechanism motionmode and the planar 3R1P four-barspatial mechanism motion mode.The flexible single-loop and variable-mode spatialmechanism is embedded into the power release branch of the vehicle door latch to realize the functions of power release and manual release.The dynamic simulation results show that the gear crank has only a small rotational angle of 0.042°in the manual release condition,thus verifying the motion compatibility between the power release branch and the manual release branch.

关 键 词：汽车侧门锁 过约束机构 复合柔顺副 变模式空间机构 动力学仿真 

分 类 号：TG112[金属学及工艺—物理冶金]