共查询到20条相似文献,搜索用时 125 毫秒
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采用选区激光熔化(SelectiveLaserMelting,SLM)快速成型设备与316L不锈钢粉末,得到的空间曲线啮合轮样品表面粗糙度值较大,主动轮与从动轮不能实现连续稳定的啮合传动。为了研究选区激光熔化成型的空间曲线啮合轮的表面后处理工艺,采用机械喷砂与电解抛光相结合的加工方法得到的主动轮与从动轮样品,表面粗糙度值达到Ra 1.0μm。实验结果表明,采用的后处理工艺和参数获得的主动轮与从动轮样品具有较高的形状精度与尺寸精度,能够实现连续稳定的啮合传动。此方法为空间曲线啮合轮提供了较好的制造思路。 相似文献
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本文在考虑齿面摩擦系数随啮合位置变化的前提下,假定从动轮的齿廓曲线为渐开线,利用切线极坐标,推导了主动轮齿廓曲线的计算式。 相似文献
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偏心-高阶椭圆锥齿轮副的强度计算方法 总被引:1,自引:0,他引:1
结合微分几何及空间齿轮啮合原理,将偏心-高阶椭圆锥齿轮副的空间节曲线在曲率半径相等的条件下展开到平面上,推导出齿轮副当量节曲线的计算公式,获得啮合传动过程中的压力角.对轮齿进行受力分析,建立偏心-高阶椭圆锥齿轮副的强度计算方法,获得轮齿接触应力及弯曲应力随主动轮转角的变化规律,确定啮合过程中最薄弱轮齿的位置.分析偏心-高阶椭圆锥齿轮副主动轮偏心率、模数、主动轮齿数及从动轮阶数等结构参数对轮齿强度的影响.建立偏心-高阶椭圆锥齿轮副有限元分析模型,利用五轴数控机床加工出齿轮副实体并搭建传动试验平台,通过有限元分析与传动试验,验证该齿轮副强度计算方法的正确性. 相似文献
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最近美国Alan Newton公司所设计的X-Y型减速器结构简单、紧凑,且可达到很高的变速比。减速器由三个主要零件组成:控制板、外齿轮和内齿环。在结构上可以外齿轮为主动轮也可以内齿环作为主动轮进行传动。控制板的作用是使行星轮只能按其轮心轨迹作平动,控制板本身只能在X方向左右移动。图1是X-Y型减速器以外齿轮作为主动轮、内齿环作为从动轮的传动简图,减速器零件分解图见《机械制造》1983第7期p.44。啮合机理分析 X-Y型减速器是一种新型传动装置,属于少齿差一类的行星减速器。图2是以内齿环作主动轮,外齿轮作从动轮的啮合过程。从图中可见,当输入偏心轴旋转时,主动内齿环在偏心轴和控制板的限制下,内齿环的圆心只能在X-Y平面中,围绕输入、输出轴轴心0, 相似文献
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为了克服被动轮驱动蛇形机器人运动能力弱的缺点,提出了一种新型三连杆主动轮驱动蛇形机器人。该蛇形机器人由多个被动关节连接的串联连杆组成,每个连杆的中心都有一个主动全向轮。全向轮的驱动力只作用于横向,而机器人则沿纵向运动。此外,针对该蛇形机器人具有非完整约束和欠驱动的特点,采用局部坐标系,设计了一种带有防滑功能的运动控制器,使运动和关节角度互不干涉。蛇形机器人蜿蜒爬行实验结果表明,所提出的设计是可行的,且运动控制器有效避免了全向车轮的打滑问题,提高了整个系统的稳定性。 相似文献
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An analysis is presented which proves the kinematic feasibility of a chain drive in which the driving and jockey wheels are eccentric and the driven wheel is concentric, the axes of rotation of all three wheels being fixed. Application of the analysis is found to confirm the findings of previous work. 相似文献
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Yang-zhi Chen En-yi He Zhen Chen 《The International Journal of Advanced Manufacturing Technology》2013,67(9-12):2387-2394
In this study, a novel finishing process named electrochemical brushing (ECB) is proposed, which integrates the merits of electrochemical polishing (ECP) and mechanical finishing (MF). It executes finishing for the space curve meshing wheel (SCMW), which was manufactured by the selective laser melting (SLM) rapid prototyping process. First, finishing experiments of ECP and ECB were carried out with optimal parameters, including an applied voltage of 10 V, a cathode and workpiece gap of 1 mm, and an ingredient electrolyte of NaNO3 (10 %)?+?Al2O3 (0.1 %)?+?H2O. Advantages of the ECB process were shown by analyzing the machining mechanism and comparing the experimental results. Furthermore, the cathode tools and finishing experimental rigs were designed to process SCMW samples. Finally, kinematics experiments were carried out, and the relation between the transmission ratio and the surface roughness of meshing tines is discussed. After ECB, as the surface roughness of meshing tines was reduced from 34 to 0.5 μm, the average transmission ratio of SCMW samples was improved from 3.922 to 3.993 and approached the theoretical value of 4, and its standard deviation was improved from 0.0317 to 0.0077. Therefore, the ECB process could be a feasible process to finish the SCMW to be able to perform precision meshing transmission. 相似文献
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设计并将永磁同步电动轮技术引入电动装载机轮边驱动行走系统中.先在台架上进行了永磁同步电动轮的特性试验,后在载重工况下对电动装载机进行了行驶、牵引和转向等试验.载重试验数据表明电动轮行驶效率达到95%以上,车速5 km.h-1左右;最大牵引力26 700 N左右,电动轮效率高达92.5%以上;电动轮能自适应差速,实现整机平稳转向. 相似文献
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Synchronous line-tracking robots based on STM32 总被引:1,自引:0,他引:1
A pair of synchronous line-tracking robots based on STM 32 are designed.Each robot is actually a small intelligent car with seven reflective infrared photoelectric sensors ST 188 installed in the front to track the line.Two rear wheels each driven by a moter are the driving wheels,while each moter is driven by an H-bridge circuit.The running direction is controlled by the turning of a servo fastened to the front wheel and the adjustment of speed difference between the rear wheels.Besides,the light-adaptive line-tracking can be performed.The speeds of the motors are controlled by adjusting pulse-width modulation(PWM)values and an angular displacement transducer is used to detect the relative position of the cars in real time.Thus,the speeds of the cars can be adjusted in time so that the synchronism of the cars can be achieved.Through experiments,the fast and accurate synchronous tracking can be well realized. 相似文献
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六独立轮驱动管内检测牵引机器人 总被引:28,自引:1,他引:27
研制了一种用于海底管道内检测系统的无缆自治型轮式牵引机器人模拟样机。介绍了机构组成及工作原理,并分析了动态行走特性。机器人采用内置电动机及传动机构的全主动轮杆式结构,包括六只驱动臂杆和机架杆。每只驱动臂杆的首端直接安装一对主动轮,由其内的一台电动机单独控制。六只驱动臂杆周向60°等间距排列在机架的外层空间,且首尾交替、轴向交错布置,形成六独立轮双截面驱动方式。位于内层中心的机架杆,两端布置力封闭可调机构,产生驱动轮与管壁的主动预紧或解锁。该机器人具有体积小、结构紧凑、牵引力大的特点。试验证明,适合作小直径管道检测系统的理想牵引装置。 相似文献