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. demonstrated by a study of mechanisms already in existence, such as the linkage of a retractable landing gear, computing mechanisms, mechanisms used in an automobile, and the like. 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. A dialindicator is a precision measuring tool that uses a needle or pointer to display a measurement on a dial. Actuator mechanism and centrifuge having actuator mechanism, Multi-Functional Fixed Robot with Horizontal Maintenance Unit, Table drive device and work system equipped with table drive device, Driving equipment and the Workpiece clamping unit equipped with the driving equipment. Scott A. Russell has filed for patents to protect the following inventions. The linkage is named after John Scott Russell (1808-1882), although watchmaker William Freemantle had already patented it in 1803. 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. With the industrial robot according to Patent Document 1, both of the arm members are rotated (turned) about the screw shaft. This paper describes the design of an exact straight line motion mechanism, commonly known as a Scott-Russell mechanism (SRM), for industrial application. In this mechanism, the slider is replaced by a link traveling . The device may include a pivot driving unit provided at any portion from the coupling position toward the tip end side of the main arm member and for pivoting the joint unit. IPTC (1) NACE (2) OTC (1) Date. The mechanism with bridge-type flexure hinges is developed and optimized to amplify the displacement of a multilayer piezostack by Kim et al. 3. In the present invention, the pivoting of the joint unit pivotably coupled to the tip end part of the main arm member is driven by the pivot driving unit. Moreover, Patent Document 3 discloses a Scott Russell mechanism applied to a drive structure of a feed arm. 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. Therefore, the posture of the joint unit can be controlled freely, and additionally, since the pivot driving unit is provided from the coupling position toward the tip end side of the main arm member, the distance to the joint unit becomes close, and the drive transmission mechanism can be scaled down. If both ends are turned into sliding connections, you get a Trammel of Archimedes. Therefore, as for the application of the Scott Russell mechanism device according to the present invention, the posture of the joint unit can be changed in the total of two kinds of manners. This mechanism is called as Peaucellier Exact Straight Line Mechanism and commonly more as Peaucelliers linkage. A systematic, if not rigorous, approach to the design of gears and cams also is usually presented in such a course. Japanese Patent Office, International Search Report of PCT/JP2012/058634, Jun. SCOTT RUSSEL MECHANISM [THEORY OF MACHINES] 1,251 views Sep 9, 2018 A Scott Russell linkage gives a theoretically linear motion by using a linkage form with three portions of the links all. Therefore, the gripping (chucking) flexibly responding to the orientation of a workpiece as a gripping target can be performed by the rotor of the rotation unit of which the amount of the postural displacement is increased, and the Scott Russell mechanism device according to the present invention can suitably be used for the gripping application. 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. The SR mechanism in combination with a parallelogram mechanism enables the achievement of a pure translation of the gripper tips, which is attractive for practical micromanipulation and microassembly applications. In this mechanism, the centres Oand O1 are fixed.. US 9,505,138 B2 device. The commonly used displacement amplification compliant mechanism has plenty of categories of bridge-type mechanisms, lever mechanisms, Scott-Russell mechanisms, and many more (Xu and Li . Any in SPE Disciplines (4) Conference. With the suffering came a wave of change that saw millions after their opinions towards not only war, but life itself. wherein the main arm member is protrudingly provided with a convex part at a side coupled to the sub arm member on the coupling position, wherein the main arm member is formed into a boomerang shape such that the coupling position is curved to make the base end part of the main arm member, the coupling shaft of the convex part, and the tip end part of the main arm member positioned on a same straight line, and. This mechanism has eight members and six joints.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'brighthubengineering_com-large-mobile-banner-2','ezslot_15',179,'0','0'])};__ez_fad_position('div-gpt-ad-brighthubengineering_com-large-mobile-banner-2-0'); The complexity of the mechanisms to generate exact straight lines can be reduced by introduction of one or more slider crank linkages. 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. In the present invention, the main arm member is formed into the boomerang-like shape to detour to the opposite side of the side where the sub arm member is positioned. The linkage has a rhombic loop formed of the equal lenght members, 5, 6, 7 and 8. 10, 2015, Germany, 6 pages. It can be used to form a right-angle change of motion, linear-to-linear. wherein a base end part of the main arm member and a base end part of the sub arm member that is on the opposite side from the coupling side of the sub arm member are positioned on the same virtual straight line, and a first distance from the base end part of the main arm member to a coupling position of the main arm member to the sub arm member, a second distance from the coupling position of the main arm member to a tip end part thereof, and a third distance from the base end part of the sub arm member to the coupling position are equal to each other. In the present invention, when the coupling angle is changed so that the base end parts of the main arm member and the sub arm member are most separated from each other, the degree of the curve of the main arm member is defined such that the second section of the main arm member is in a substantially parallel orientation to the linear sub arm member. Campbell, Scott SPE Disciplines. Note that, a direction of the X-axis illustrated in, About the above-described angle on the coupling position, When the coupling angle between the main arm member, In a case where the main and sub arm members, Therefore, for example, when the second motor M, Note that, in a case where the change of increasing the coupling angle is desired to be performed quickly, the rotations of the first and second motors M, Note that, the rotations of the first and second motors M, Note that, the Scott Russell mechanism device, Moreover, in a case where it is desired to point the gripping unit, Further, regarding the mechanism for pivoting the joint unit, Moreover, with the configuration as described above, it is suitable for the fourth motor M, Moreover, other than the application of gripping, for example, in a case of applying to the application of placing and moving the workpieces, a placing unit or the like is attached instead of the gripping unit, That is, the Scott Russell mechanism device, As for the Scott Russell mechanism device, Note that, also as for the Scott Russell mechanism device. Therefore, the gripping unit can be pivoted proximally to the workpiece which is the gripping target, and the Scott Russell mechanism device including a griping function suitable for such a gripping application can be provided. The Scott Russell mechanism device of, 17. Scott Russell's Mechanism - Special Mechanism - Kinematics of Machinery Ekeeda 914K subscribers Subscribe 44 2.1K views 7 months ago Subject - Kinematics of Machinery Video Name - Scott. Based on the geometry of the linkage the output motion is a simple sine function of the drive link or a simple harmonic motion. 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. The proposed mechanism is applied in an internal materials movement system using autonomous guided vehicles (AGVs) for supporting logistics processes along the supply chain, aiming to replace the current manual operations. Debates (Hansard) No. 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. 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 so as to turn only both of the arm members. Moreover, the present invention aims to provide a Scott Russell mechanism device that allows a main arm member and a sub arm member to pivot at a base end part of both of the arm members to reduce a drive torque for turning both of the arm members, and to increase in degree of freedom in postures of various kinds of units attached to a tip end of the main arm member compared to the conventional degree. 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. Scott-Russell mechanism: The schematic of a flexure hinge-based Scott-Russell mechanism is depicted in Figure 3. mechanism of machinery straight and parallel line mechanism table of contents straight line mechanism introduction history different mechanism used for The Scott Russell mechanism device of, 12. All Rights Reserved. With the Scott Russell mechanism device, a moving range of the tip end side of the main arm member can be enlarged. By the constraints of the geometry point A moves in a circular path and as the point A moves in a circle point P traverses an exact straight line path normal to the line joining O2 and O4.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'brighthubengineering_com-large-mobile-banner-1','ezslot_14',174,'0','0'])};__ez_fad_position('div-gpt-ad-brighthubengineering_com-large-mobile-banner-1-0'); From the construction of the Peaucellier linkage it is clear that this is a much more complex mechanism than the mechanisms generating approximate straight lines, which were simple four bar linkages. An axis of the pivot of the pivoting member may be in parallel to the pivoting axis of the joint unit. A base end part of the main arm member and a base end part of the sub arm member that is on the opposite side from the coupling side of the sub arm member are positioned on the same virtual straight line, and a first distance from the base end part of the main arm member to a coupling position of the main arm member to the sub arm member, a second distance from the coupling position of the main arm member to a tip end part thereof, and a third distance from the base end part of the sub arm member to the coupling position are equal to each other. This paper will discuss the mechanical design theoretical modeling and analyses, finite element analysis and experimental verification. 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. Application: Creates an approximate straight line if sliding along flat plane. Scott Russell has filed for patents to protect the following inventions. Scott Russell Business Consultant Santa Barbara, California, United States 2K followers 500+ connections Join to connect Proactivate Consulting LLC About A Senior Business Executive with a. Manufacturing methods for gripping devices, robot devices, control methods, control programs, recording media, and articles. ULTRASOUND SYSTEM FRONT-END CIRCUIT FOR A 128-ELEMENT ARRAY PROBE Publication number: 20220381890 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. A rotation unit having a rotor may be coupled to the pivoting member. The present invention is made in view of the above situations, and aims to provide a Scott Russell mechanism device that allows a main arm member and a sub arm member to pivot at a base end part of both of the arm members to reduce a drive torque for turning both of the arm members, and to increase the degree of freedom in postures of various kinds of units attached to a tip end of the main arm member compared to the conventional degree. Explanation: Scott Russell's mechanism is an exact straight line mechanism, however this mechanism is not so useful for practical purposes as friction and wear of sliding pair is more than that of turning pair. Therefore, as for the application of the Scott Russell mechanism device according to the present .

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