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针对目前已有的行星轮式爬楼小车的爬楼机构没有统一设计标准的问题,对四轮式行星轮爬楼机构进行尺寸优化设计,将标准要求几何化、参数化。基于欧几里得几何学,确定了行星轮爬楼机构的外形尺寸与轮胎尺寸。通过使用AutoCAD中的几何约束进行了尺寸校核,通过SolidWorks进行了运动仿真。研究了优化设计后的爬楼机构在不同尺寸楼梯下的重心起伏。研究结果表明,经过优化设计后的四轮组行星轮式爬楼小车的通过性强,可以满足所有符合标准设计的楼梯。小车的整体体积合适,重心起伏小,安全性高。 相似文献
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为了解决老户型无电梯小区搬运大件物品不便的问题,设计了基于滑块机构电助力爬楼机,采用曲柄滑块机构作为助力爬楼机的主要运动机构,以24 V锂电池及减速电机作为爬楼机的动力提供和动力输出机构。通过UG软件的motion进行滑块导路倾角的优化分析,模拟出滑块在运动过程中最低点与最高点之间的距离差为17.674 cm,表明爬楼车的运动满足我国建筑楼梯模数协调标准,物理样机的实验也验证了这一点;通过ANSYS分析,表明小车爬楼运动过程中强度满足受力要求,爬楼机可在楼梯上平稳运行,爬楼过程中的安全性和可靠性将通过机械结构做保障。 相似文献
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设计了一种链脚式电动爬楼载物车,通过固定在链条上的链条脚与楼梯接触的同时链条脚随链条做周期循环运动来实现爬升越障的功能。从使用要求及经济性因素考虑,爬升系统采用齿轮传动和链传动相结合的方式,使得整体结构设计紧凑、传动过程平稳。对链传动参数确定及爬升链脚进行了设计计算,并对所设计的爬楼载物车实物进行了爬楼梯试验验证,结果表明整体结构合理,运行过程平稳,能够满足设计要求。 相似文献
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针对老年人和身体残障人士安全地爬楼和在地面上高效移动的需求,设计了一种行星轮式电动爬楼梯轮椅,详细介绍了该轮椅机构组成、控制系统及其功能特点。通过建立基于拉格朗日方程的行星轮组动态模型,研究了不同等效转矩下行星轮组的角加速度曲线,详细分析了轮椅在爬楼梯过程中的稳定裕度。研究表明,防倾翻支架能有效地提高轮椅爬楼的稳定性。该行星轮式爬楼梯轮椅能够安全有效地帮助老年人和身体残障人士,满足日常出行与攀爬楼梯的实际需求。 相似文献
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《现代制造技术与装备》2020,(2)
针对我国目前生产的轮椅爬越能力不强的难题,研究并设计一种适用于行动能力有缺陷的老年人和残疾人等人群的新型智能爬楼轮椅。首先,对智能爬楼轮椅的运动过程进行分析,并确定了设计方案包括动力驱动机构、行驶机构、行驶机构伸展装置、座椅调平机构等。其次,阐述了整体机构及工作原理,并用SolidWorks软件对智能爬楼轮椅进行三维建模。再次,对动力驱动机构和行驶机构等关键部分进行了理论测算,并通过Simulation、Motion模块进行静力学应力、位移特性和运动特性的仿真分析。最后,对智能爬楼轮椅的控制系统进行设计和简单分析。本智能爬楼轮椅具有爬楼能力强、自动调平等特点,可以克服现实生活中爬楼难的问题,可在医疗器械、助老领域推广应用。 相似文献
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通过对现有的三叉构件式阶梯面运行装置的结构,运动和受力分析,探讨一处既能推行又能驱动自行,运动平稳,受力良好,应用广泛的新型啮合轮式阶梯面运行装置。 相似文献
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Dynamic stair walking of biped humanoid robots 总被引:1,自引:0,他引:1
Seungchul Lim 《Journal of Mechanical Science and Technology》2007,21(6):970-975
Biped humanoid robots are expected to move around human-centered setting that includes stairs as a major terrain. Reportedly,
however, only few of them can walk up and down stairways as of now. Making it worse, even the successful ones carry out such
motions either barely in terms of speed or fast enough but in an undisclosed technical manner. In this context, a dynamic
gait pattern is proposed anew suitable for stair walks along with a transient pattern and verified by means of a multi-body
dynamics analysis software. 相似文献
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Wheelchair.q, a motorized wheelchair with stair climbing ability 总被引:1,自引:0,他引:1
Giuseppe QuagliaAuthor Vitae Walter Franco Author VitaeRiccardo Oderio Author Vitae 《Mechanism and Machine Theory》2011,46(11):1601-1609
The paper deals with Wheelchair.q, a concept for a stair climbing wheelchair capable of moving in structured and unstructured environments, climbing over obstacles and going up and down stairs.The design of the wheelchair, consisting of a frame, a seat and a four-bar linkage mechanism that connects frame and seat, is presented.The four-bar linkage moves and rotates the chair to prevent the wheelchair from overturning and to guarantee a comfortable posture to the passenger during different operations. The kinematic synthesis of the linkage mechanism is discussed using an algebraic method. When the wheelchair faces an obstacle such as a step or a stair, it can passively change locomotion mode, from rolling on wheels to walking on rotating legs, thanks to its self-adaptive locomotion units. The function of the locomotion unit is described and modeled using kinematic equations. The locomotion unit requires only one motor, for both wheeled and legged locomotion. Tests on a scale prototype were conducted in order to evaluate the effectiveness of this locomotion. 相似文献
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In a recent paper, the Ritz method with simple algebraic polynomials as trial functions was used to obtain an eigenvalue equation for the free vibration of a class of homogeneous solids with cavities. The method presented is here extended to the study of a class of non-homogeneous solids, in which each solid is composed of a number of isotropic layers with different material properties. The Cartesian coordinate system is used to describe the geometry of the solid which is modelled by means of a segment bounded by the yz, zx and xy orthogonal coordinate planes and by two curved surfaces which are defined by fairly general polynomial expressions in the coordinates x, y and z. The surface representing the interface between two material layers in the solid is also described by a polynomial expression in the coordinates x, y and z. In order to demonstrate the accuracy of the approach, natural frequencies are given for both a two- and three-layered spherical shell and for a homogeneous hollow cylinder, as computed using the present approach, and are compared with those obtained using an exact solution. Results are then given for a number of two- and three-layered cylinders and, to demonstrate the versatility of the approach, natural frequencies are given for a five-layered cantilevered beam with a central circular hole as well as for a number of composite solids of more general shape. 相似文献
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通过分析膨胀套在实际使用产生滑移受阻现象、卡死现象原因的实质,并在分析产生问题原因的基础上提出了改进措施即:增加导向机构。 相似文献
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设计了磨粉机快辊轴承座的加工工艺和具体的工装夹具.利用卧式加工中心加工磨粉机快辊轴承座,辅以能够高效快速夹紧的夹具,既可以保证加工精度,又能够提高加工效率. 相似文献