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. This paper will discuss the mechanical design theoretical modeling and analyses, finite element analysis and experimental verification. The structural application of flexure hinges in the SR mechanism is especially important to practically play a powerful role in the positioning stage and precision cutting. 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. A Scott Russell mechanism device is formed into a boomerang-like shape such that a main arm member coupled to a sub arm member is curved to detour a coupling position. Straight Line Mechanisms | iamchaitanya For this description to be true the acting length of the short link, the blue one, needs to be half as long as the active length of the green one and the pin that connects them must be . Two equal length length links are connected to the opposite corners of the rhombus at one end and to a common fixed point at the other ends. An 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. This mechanism is a modification of modified Scott-Russel'smechanism with the difference that the point Pdoes not slide along a straight line, but moves in a circular arc with centre O. The Bricard inversor directly incorporates the Scott Russell's links, replacing the previously required straight line connection and allowing for two exact straight line outputs at right angles. 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. The Scott Russell mechanism device of. Thus, when the coupling angle is changed so that a base end part of the main arm member and a base end part of the sub arm member are most separated from each other, a tip end . ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). The dynamic equations of a micro-positioning Scott-Russell (SR) mechanism associated with . It is possible to generate an exact straight line using the slider crank mechanism but the range of motion is limited. 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. 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. 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. The requirements of the design are identified and the modelling phases of the mechanism are described. Therefore, compared to the conventional device, a drive torque caused by the turning can be reduced, and both of the arm members can be turned smoothly. 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. cylindrical coordinate type or polar coordinate type, 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, The United States Of America As Represented By The Secretary Of The Navy, Gilman Engineering & Manufacturing Co., Llc, The Regents Of The University Of Michigan, ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SASAKI, HIROMICHI;SHIMIZU, MIKIO;ICHIKAWA, YASUNORI;REEL/FRAME:031303/0520, PAYMENT OF MAINTENANCE FEE, 4TH YR, SMALL ENTITY (ORIGINAL EVENT CODE: M2551); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY, Motor-driven articulated arm with cable capstan including a brake, Substrate transfer unit, substrate treating apparatus including the same, and substrate treating method, Drive mechanism and manufacturing apparatus, Based on the collapsible explorer mechanical arm of triangle configuration link transmission, Device for carrying out a phase-locked linear displacement of two shafts arranged in parallel, Picking mechanism with metamorphic function, Bending apparatus for material testing and micro-ct imaging, mechanical arm with synchronous belt transmission device, Suitable for the lifting mechanism of disk-like accessory, STRIP CUTTING SYSTEM BY HELICOIDAL KNIVES AND CORRESPONDING CUTTING PROCESS, Motorized manipulator of the cable transmission type having an increased field of action, Scara type robot with counterbalanced arms, Pick and place device having two parallel axes, Improvements in or relating to overhead electric traction systems, Joint structure of arm, etc. ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SASAKI, HIROMICHI;SHIMIZU, MIKIO;ICHIKAWA, YASUNORI;REEL/FRAME:031303/0431, PAYMENT OF MAINTENANCE FEE, 4TH YR, SMALL ENTITY (ORIGINAL EVENT CODE: M2551); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY. Scott Russell linkage - Wikipedia The device may include a pivoting mechanism unit for automatically pivoting the joint unit cooperating with the angle change by the angle changer, a pivot driving unit for pivoting the joint unit via the pivoting mechanism unit independently from the angle change by the angle changer. Scott Russell has filed for patents to protect the following inventions. 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. 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. Moreover, Patent Document 3 discloses a Scott Russell mechanism applied to a drive structure of a feed arm. Therefore, the first ball screw will be excluded from the turning targets, compared to the turnings of both of the arm members of the industrial robot relating to the reference document 1 described above, a drive torque caused by the turn is reduced, and both of the arm members can be turned smoothly. 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. The linkage is named after John Scott Russell (1808-1882), although watchmaker William Freemantle had already patented it in 1803. 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. This paper presents the structural design and analysis of a novel compliant gripper based on the Scott-Russell (SR) mechanism. 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. In the present invention, the joint unit, the rotation unit, and the pivoting unit are coupled to each other in this order. wherein a pivoting axis of the pivot of the joint unit is in parallel to an axis of the pivots of the main arm member and the sub arm member at the coupling position, and. Moreover, Patent Document 3 discloses a Scott Russell mechanism applied to a drive structure of a feed arm. wherein the main arm member is formed linearly in a first section extending from the base end part to the part corresponding to the coupling position and in a second section extending from the part corresponding to the coupling position to the tip end part, and the part corresponding to the coupling position is curved, and. 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. 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. 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. A standard Scott Russell straight- mechanism was invented by a French army officer, line mechanism provides an exact straight-line mo- Charles Nicolas Peaucellier, in 1864. In the present invention, the rotation unit is coupled to the joint unit. wherein the degree of the curve of the main arm member is defined such that the second section of the main arm member becomes at a substantially parallel angle to the sub arm member when the angle changer changes the coupling angle so that the base end parts of the main arm member and the sub arm member are most separated from each other. Structure design of a new compliant gripper based on Scott-Russell 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. 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.