scott russell mechanism application
ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SASAKI, HIROMICHI;SHIMIZU, MIKIO;ICHIKAWA, YASUNORI;REEL/FRAME:031303/0431, Free format text: A pivoting unit having a pivoting part that is pivotable centering on an axis in parallel to the pivoting axis of the joint unit may be coupled to the rotor of the rotation unit. One of the ends is then connected to something that can generate linear motion, such as a rolling or sliding connection, or another straight line mechanism. In certain design requirements such as design of production machinery it is desirable to have more accurate straight line paths or sometimes it becomes inevitable to have exact straight line trajectories of mechanisms. The construction of this mechanism is such that the point which is connected to the crank moves in a circular path and the point traversing the straight line is selected as the output point. Grasshopper Mechanism: This mechanism is a modification of the Scott-Russell Mechanism. Therefore, compared to the case of coupling the units in an order different from above, the pivoting unit positioned at the farthest tip end can perform the postural displacement in a different range. This mechanism is called as Peaucellier Exact Straight Line Mechanism and commonly more as Peaucelliers linkage. Design, analysis and testing of a novel decoupled 2-DOF flexure-based A Scott Russell linkage is a linkage which translates linear motion through a right angle. Thus, the degree of posturing freedom of the rotor of the rotation unit positioned to the farthest tip end increases, and the application of the Scott Russell mechanism device according to the present invention further expands. Therefore, even if the main arm member and the sub arm member are not arranged to offset from each other, interference between the arm members at the coupling position of both of the arm members can be subsided, and compared to the conventional device without an offset arrangement, the tip end part of the main arm member can be drawn close to the sub arm member. In order to solve the above problem, a Scott Russell mechanism device according to the present invention includes a main arm member, a sub arm member pivotably coupled to the main arm member, and an angle changer for changing a coupling angle between the main arm member and the sub arm member. The Scott Russell mechanism device of, 15. Moreover, in the present invention, the base end part of either one of the sub arm member or the main arm member is linearly movable by the second ball screw. Includes bibliographical references and index. cartesian coordinate type, Programme-controlled manipulators characterised by movement of the arms, e.g. In the present invention, either one of the base end parts of both of the arm members is linearly moved by the rotation of the first ball screw, and the pivots (turnings) of both of the arm members are driven about the virtual straight line connecting the base end parts of both arm members therebetween as the pivoting axis thereof, resulting in only both of the arm members turning. In the present invention, the base end part of either one of the sub arm member or the main arm member is linearly movable by the second ball screw. Any in SPE Disciplines (4) Conference. One link is double the size of the other, and is connected to the smaller link by its midpoint. Further, Patent Document 2 discloses a Scott Russell mechanism applied to a positioning transport device. An interesting mechanism to consider in designing leverage devices with flextensional joints is the Scott -Russel, also known as half beam mechanism, which is described geometrically in Fig.. Moreover, in the Scott Russell mechanism device according to the present invention, a joint unit may be pivotably coupled to the tip end part of the main arm member. Patent Document 1 discloses a Scott Russell mechanism applied to a industrial robot. The bridge-type mechanism is one of the most widely used displacement ampliers in micro- scale applications. Moreover, in the present invention, the pivot of the joint unit pivotably coupled to the tip end part of the main arm member is driven by the pivot driving unit. A Scott Russell mechanism is a mechanism where a linear main arm member is pivotably coupled to a sub arm member, a distance from a base end part of the main arm member to a coupling position thereof, a distance from the coupling position of the main arm member to a tip end part thereof, and a distance from a coupling position of the sub arm member to a base end part thereof are all equal to each other, and in a case where a coupling angle between both of the arm members is changed, the tip end part of the main arm member linearly moves along a straight line connecting the tip end part of the main arm member and the based end part of the sub arm member. 1 (b), where the condition that the motion of the point B follows a vertical motion when the driving point A moves along horizontal direction is that the links AC=BC=OC. Scott-Russell Exact Straight Line Mechanism The complexity of the mechanisms to generate exact straight lines can be reduced by introduction of one or more slider crank linkages. a second ball screw arranged in parallel to the first ball screw; and, a second linearly-moving unit for being linearly moved by a rotation of the second ball screw, and, wherein either one of the base end part of the sub arm member or the base end part of the main arm member is pivotably coupled to the second linearly-moving unit about the virtual straight line as the pivoting axis thereof. Therefore, a plurality of variations can be provided to the method of moving the base end part of both of the arm members, resulting in being able to flexibly perform the moving of the tip end part of the main arm member. Machine Kinematics Question Papers - Sanfoundry Moreover, in the present invention, the gripping unit is attached to the tip end side of the pivoting unit. Further, Patent Document 5 discloses a Scott Russell mechanism in a modified example where the coupling between the main arm member and the sub arm member is in a crank shape, the Scott Russell mechanism applied to a transport device. Design and Analysis of a Modified Scott Russell Straight-Line Mechanism Further, in the present invention, the gripping unit is attached to the rotor of the rotation unit. The first exact straight line generating mechanism was invented by a French army officer Charles Nicolas Peaucellier in 1864. a first ball screw arranged in parallel to the virtual straight line; and, a first linearly-moving unit for being linearly moved by a rotation of the first ball screw, and, wherein either one of the base end part of the main arm member or the base end part of the sub arm member is pivotably coupled to the first linearly-moving unit about the virtual straight line as the pivoting axis thereof, and. It is possible to generate an exact straight line using the slider crank mechanism but the range of motion is limited. This paper will discuss the mechanical design theoretical modeling and analyses, finite element analysis and experimental verification. a sub arm member pivotably coupled to the main arm member; and. The First World War brought about much destruction and horror to extents that the world had never before seen. Moreover, in each of the above-described patent documents, various kinds of units, such as the holder, the arm, and the hand, are attached to the tip end of the main arm member. The present invention relates to a device applied with a Scott Russell mechanism where a main arm member and a sub arm member are coupled to each other and a coupling angle therebetween is changeable, and particularly relates to a Scott Russell mechanism device that can allow a tip end part of a main arm member to approach a sub arm member without interfering even in a case where the coupling angle of the base end parts of the main arm member and the sub arm member is changed so that the base end parts are spaced from each other, and can attach various kinds of units to the tip end side of the main arm member and change postures of the units in a wide range. Simply download our free CAD . Straight and Parallel line Mechanism - Studocu [Solved] A Scott-Russell mechanism consists of- - Testbook The design criteria of the Scott-Russell mechanism are to achieve large amplification factor and minimum motion deviation. Further, in the Scott Russell mechanism device according to the present invention, the main arm member and the sub arm member may be pivotable about the virtual straight line as a pivoting axis thereof. Further, in the Scott Russell mechanism device according to the present invention, a gripping unit may be attached to the rotor of the rotation unit. 10, 2015, Germany, 6 pages. Furthermore, in the Scott Russell mechanism device according to the present invention, a rotation unit having a rotor may be coupled to the joint unit. It consists of both sliding and turning pairs Download Solution PDF Share on Whatsapp Moreover, in the present invention, the pivoting member is pivotably coupled to the joint unit and the rotation unit having the rotor is coupled to the pivoting member. [1][2], A different form of the linkage has been used in a front-wheel-drive vehicle with solid rear axle to control lateral movement, and with a flexing elastomeric connection instead of the rolling or sliding connection. Exact dimensions of scott russell mechanism - caqweoutlet . A straight-line mechanism causes a point to travel in a straight line, or in a nearly straight line, without being guided by a plane surface. A Scott Russell mechanism is a mechanism where a linear main arm member is pivotably coupled to a sub arm member, a distance from a base end part of the main arm member to a coupling position thereof, a distance from the coupling position of the main arm member to a tip end part thereof, and a distance from a coupling position of the sub arm member to a base end part thereof are all equal to each other, and in a case where a coupling angle between both of the arm members is changed, the tip end part of the main arm member linearly moves along a straight line connecting the tip end part of the main arm member and the based end part of the sub arm member. Either one of the base end part of the sub arm member or the base end part of the main arm member may be pivotably coupled to the second linearly-moving unit about the virtual straight line as the pivoting axis thereof. 1. PATENTED CASE, Free format text: In the present invention, the pivoting member is pivotably coupled to the joint unit and the rotation unit having the rotor is coupled to the pivoting member. mechanism of machinery straight and parallel line mechanism table of contents straight line mechanism introduction history different mechanism used for In the present invention, the joint unit pivotably coupled to the tip end part of the main arm member can be pivoted in a total of two kinds of manners including the pivot cooperating with the angle change between both of the arm members at the coupling position and the pivot independent of the angle change. A pivoting axis of the pivot of the joint unit may be in parallel to an axis of the pivots of the main arm member and the sub arm member at the coupling position. Manufacturing methods for gripping devices, robot devices, control methods, control programs, recording media, and articles. Furthermore, a Scott-Russell mechanism and lever mechanism are arranged in series for constituting a two-grade displacement amplifier to conquer the small displacement of PZTs in each axis. cylindrical coordinate type or polar coordinate type, Programme-controlled manipulators characterised by positioning means for manipulator elements, Programme-controlled manipulators characterised by positioning means for manipulator elements with articulated links, MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING, ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL, Gearings comprising primarily only links or levers, with or without slides, Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane, Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for conveying or interconverting oscillating or reciprocating motions, GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS, TECHNICAL SUBJECTS COVERED BY FORMER USPC, TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS, TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION, Multiple controlling elements for single controlled element, United Kingdom Atomic Energy Authority, London, Gilman Engineering & Manufacturing Co., Llc, The United States Of America As Represented By The Secretary Of The Navy, The Regents Of The University Of Michigan. US 9,505,138 B2 10 45 . a pivot driving unit for pivoting the joint unit via the pivoting mechanism unit independently from the angle change by the angle changer. The mechanism with bridge-type flexure hinges is developed and optimized to amplify the displacement of a multilayer piezostack by Kim et al. In each of the applets, drag the sliders to change the shape of the path of the free point to obtain the longest possible straight path. Therefore, by the rotor of the rotation unit where the amount of the postural displacement is increased compared to the conventional device, the Scott Russell mechanism device according to the present invention can be applied to the application of performing the gripping while flexibly responding to the orientation of a workpiece as a gripping target. HVAC: Heating, Ventilation & Air-Conditioning, Peaucellier Exact Straight Line Mechanism, Scott-Russell Exact Straight Line Mechanism, This post is part of the series: Kinematics - Design of Mechanisms, How to Calculate Cement, Sand and Aggregates in a Beam | Step by Step, Kinematics - Design of Mechanisms: Introduction, Kinematics Design of Mechanisms: Kinematic Inversion, Kinematics Actuation of Machines: Part I Electrical Actuation, Kinematics Actuation of Machines: Part II Hydraulic Actuation, Kinematics Actuation of Machines: Part III Pneumatic Actuation, Kinematics - Analysis of Mechanisms: Methods and Techniques, Kinematics - Synthesis of Mechanisms: Methods and Techniques, Kinematics - Special Mechanisms: Straight Line Mechanisms - II.
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