The application of the Scott Russell mechanism device according to the present invention expands by attaching various kinds of units corresponding to various applications to its rotor. [1] [2] Furthermore, Patent Document 4 discloses a Scott Russell mechanism applied to an industrial robot. Scott-Russell Exact Straight Line Mechanism: Scott-Russell The complexity of the mechanisms to generate exact straight lines can be reduced by introduction of one or more slider crank linkages. With the Scott Russell mechanism device, a moving range of the tip end side of the main arm member can be enlarged. 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. If you need custom mechanical parts machined - eMachineShop can help. This mechanism is called as Peaucellier Exact Straight Line Mechanism and commonly more as Peaucelliers linkage. 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, the rotation unit having the rotor is coupled to the joint unit. Bridge-type amplification mechanism Bridge-type mechanism, rhombic mechanism, double-rocker mechanism, scott-russell mechanism, honey comb mechanism, and lever mechanism are a few amplification mechanisms which have been used for micro/nano manipulation purposes [ 33, 34, 35, 36, 37 ]. Scott Russell Mechanism 2 | PDF | Line (Geometry) | Acceleration - Scribd (PDF) Mechanics of Machinery I | Tareq shaban - Academia.edu 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. 10. The main arm member and the sub arm member may be pivotable about the virtual straight line as a pivoting axis thereof. Moreover, with the industrial robot according to Patent Document 1, both of the arm members are rotated (turned) about the screw shaft 21 as a rotation center (turning center), then all of the industrial robot including the screw shaft 21 is turned, and thus a problem arises that a drive torque for the turning increases. The optimally-designed stage was fabricated by wire electrical discharge machining and tested to investigate its performance. Search Campbell, Scott: oil formation volume factor | SPE Freemantle straight-line linkage from British Patent 2741, November 17, 1803. Furthermore, in the Scott Russell mechanism device according to the present invention, 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. The linkage is named after John Scott Russell (18081882), although watchmaker William Freemantle had already patented it in 1803. A tip end part of a main arm member of a Scott Russell mechanism is enabled to be brought close to a base end part of a sub arm member. 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. 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. 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. Scott-Russell mechanism: The schematic of a flexure hinge-based Scott-Russell mechanism is depicted in Figure 3. The length of the link 2 is equal to the distance between points O2 and O4. 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. 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. 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. The Scott Russell mechanism device of, 18. European Patent Office, Extended European Search Report Issued in Application No. Therefore, the application of the Scott Russell mechanism device according to the present invention expands. Therefore, since the rotation unit has the rotor that is rotatable independently to the displacement of the tip end part of the main arm member, the degree of freedom of the posture of the rotor of the rotation unit provided to the tip end side of the main arm member improves. The First World War. - A-Level English - Marked by Teachers.com In the present invention, the joint unit, the rotation unit, and the pivoting unit are coupled to each other in this order. 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 first exact straight line generating mechanism was invented by a French army officer Charles Nicolas Peaucellier in 1864. 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, the rotation unit attached to the joint unit via the pivoting member can displace its rotor independently of the amount of the displacement of the tip end part of the main arm member, and the postural displacement of the rotor positioned at the farthest tip end increases much more. Japanese Patent Office, International Search Report of PCT/JP2011/058124, Jun. 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. Specifically, the tip end part of the main arm member can be moved by only moving the base end part of the main arm member, by only moving the base end part of the sub arm member, or by moving both of the base end parts of both of the arm members, respectively. Book - NIPS Thus, the tip end part of the main arm member can be drawn more to the base end part of the sub arm member. It is possible to generate an exact straight line using the slider crank mechanism but the range of motion is limited. an angle changer for changing a coupling angle between the main arm member and the sub arm member. Jasen Russell sur LinkedIn : The mystery of what's eating our plastic 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. wherein the device comprises 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. 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 . Part of the Lecture Notes in Electrical Engineering book series (LNEE,volume 505) Abstract This paper describes the design of an exact straight line motion mechanism, commonly known as a Scott-Russell mechanism (SRM), for industrial application. The angle changer may have 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. 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. There are many mechanisms based on slider crank linkage which can generate exact straight lines for limited intervals. The Scott Russel mechanism converts linear motion in one direction to another direction. 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. wherein the device comprises a pivoting drive source for driving the pivots of the main arm member and the sub arm member centering on the pivoting axis. 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. One link is double the size of the other, and is connected to the smaller link by its midpoint. 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. A dialindicator is a precision measuring tool that uses a needle or pointer to display a measurement on a dial. A systematic, if not rigorous, approach to the design of gears and cams also is usually presented in such a course. 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 mechanism applied to a drive structure of a feed arm. It is evident from the figure that this mechanism is made up of isosceles triangles, AB, AC and AO2 are of equal lengths. A mechanical linkage is an assembly of systems connected to manage forces and movement. The mechanism to the right can be refered to as the Scott Russell Mechanism or a more descriptive name is the Scott Russell Exact Straight Line Mechanism. Design, analysis and testing of a novel decoupled 2-DOF flexure-based 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. an angle changer for changing a coupling angle between the main arm member and the sub arm member, wherein a joint unit is pivotably coupled to the tip end part of the main arm member, and, 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, a pivoting mechanism unit for automatically pivoting the joint unit cooperating with the angle change by the angle changer; and. Relative motion angles other than 90 degrees are possible by simply rotating the fixed guide. Micromachines | Free Full-Text | Design and Analysis of a Hybrid 11. One such example is Scott-Russell Mechanism as shown in the figure. Scott Russell Mechanism - acculasopa 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. Scott Russell mechanism device - SQUSE Inc. Based on the geometry of the linkage the output motion is a simple sine function of the drive link or a simple harmonic motion. 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. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO). A Scott Russell linkage is a linkage which translates linear motion through a right angle. cartesian coordinate type, Programme-controlled manipulators characterised by movement of the arms, e.g. The application of the Scott Russell mechanism device according to the present invention expands by attaching various kinds of units corresponding to various applications to its rotor. Moreover, 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. 10, 2015, Germany, 6 pages. Therefore, since the rotor of the rotation unit can rotate independently of the displacement of the tip end part of the main arm member, the displacement amount of the rotor of the rotation unit coupled to the tip end side of the main arm member can be increased, and the application of the Scott Russell mechanism device according to the present invention further expands.
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