ULTRASOUND SYSTEM FRONT-END CIRCUIT FOR A 128-ELEMENT ARRAY PROBE Publication number: 20220381890 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 . It is evident from the figure that this mechanism is made up of isosceles triangles, AB, AC and AO2 are of equal lengths. Moreover, by providing a pivot driving unit to the main arm member, as well as providing a fourth motor and a drive transmission mechanism unit to the sub arm member, the Scott Russell mechanism device can switch between pivoting the joint unit associatively a change of a coupling angle of the arm members and and pivoting the joint unit by the drive of the fourth motor. [3], The linkage does not share the disadvantages of the asymmetric Panhard rod, and although more compact than Watt's linkage, it has all the forces concentrated in one link.[4]. 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. STRAIGHT LINE MOTION MECHANISM Converts rotary motion into a straight line motion. The Scott Russell mechanism device of, 14. 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.. Peaucellier linkage can convert an input circular motion to the exact straight line motion. 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. KINEMATICS OF MECHANISMS FROM THE TIME OF WATT, Animation of a Scott-Russell linkage in action, https://en.wikipedia.org/w/index.php?title=Scott_Russell_linkage&oldid=1087282615, Short description is different from Wikidata, Pages using multiple image with auto scaled images, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 11 May 2022, at 14:35. 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. 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. The main arm member is formed into a boomerang-like shape such that the coupling position is curved to detour to an opposite side from the side where the sub arm member is positioned. 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. A systematic, if not rigorous, approach to the design of gears and cams also is usually presented in such a course. CORROSION 2003 (1) CORROSION 2004 (1) International Petroleum Technology Conference (1) Offshore Technology Conference Asia (1) Publisher. The mechanism with bridge-type flexure hinges is developed and optimized to amplify the displacement of a multilayer piezostack by Kim et al. The SR mechanism in combination with a parallelogram mechanism enables. Scott Russell has filed for patents to protect the following inventions. 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 attach units to the tip end side of the main arm member and change postures of the units variously. 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. Il permet de dtailler la liste des options de recherche, qui modifieront les termes saisis pour correspondre la slection actuelle. 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. Therefore, as for the application of the Scott Russell mechanism device according to the present . The requirements of the design are identified and the modelling phases of the mechanism are described. [0016]. The proposed stage showed the first natural frequency of 57 Hz and the maximum stroke of 122.84 m, 108.46 m, 0.685 mrad in the x-, y-, and -direction, respectively. The design criteria of the Scott-Russell mechanism are to achieve large amplification factor and minimum motion deviation. In the present invention, the gripping unit is attached to the tip end side of the pivoting unit. The linkage is named after John Scott Russell (18081882), although watchmaker William Freemantle had already patented it in 1803. The distance from the pivot driving unit to the joint unit becomes closer, and the transmission mechanism regarding the drive can be coordinated compactly. 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. 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, Improvements in or relating to overhead electric traction systems, Robot arm for use with injection moulding machine, Joint structure of arm, etc. Owner name: wherein a rotation unit having a rotor is coupled to the pivoting member. 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. 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. 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. Further, when both of the base end parts of both of the arm members are moved in the same direction by the same amount, both of the arm members can be moved entirely while keeping their postures. Therefore, the rotation unit attached to the joint unit via the pivoting member can displace its rotor independently of the displacement of the tip end part of the main arm member. Machines as simple as livers, machines such as James Watts steam engine and the industrial robots such as PUMA all are composed of mechanisms whether simple, complex or combination of many simple and complex mechanisms. 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. It contains solutions to the problems in the book and is available free of charge to adopters. In this mechanism, the slider is replaced by a link traveling . The linkage has a rhombic loop formed of the equal lenght members, 5, 6, 7 and 8. 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. If you need custom mechanical parts machined - eMachineShop can help. The Scott Russell mechanism device of. 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. In the present invention, the joint unit, the rotation unit, and the pivoting unit are coupled to each other in this order. The Scott Russell mechanism device of, 13. Scott-Russell variation #1. Schematic of a Scott-Russell mechanism using flexure hinges Open in viewer 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. The main arm member and the sub arm member may be pivotable about the virtual straight line as a pivoting axis thereof. Therefore, the application of the Scott Russell mechanism device according to the present invention expands. Moreover, in the present invention, the gripping unit is attached to the tip end side of the pivoting unit. cartesian coordinate type by rotating at least one arm, excluding the head movement itself, e.g. In the present invention, the rotation unit having the rotor is coupled to the joint unit. As detailed in the previous articles there are many four bar linkage based mechanisms which can generate straight lines. Table drive device and work system equipped with table drive device, Driving equipment and the Workpiece clamping unit equipped with the driving equipment. This paper describes the design of an exact straight line motion mechanism, commonly known as a Scott-Russell mechanism (SRM), for industrial application. Robert's Mechanism. 2- Approximate straight line mechanisms:- Modified . The length of the link 2 is equal to the distance between points O2 and O4. Therefore, the gripping unit can be pivoted proximally to the workpiece which is the gripping target, and the Scott Russell mechanism device including a gripping function suitable for such a gripping application can be provided. A Scott Russell linkage is a linkage which translates linear motion through a right angle. 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. 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. The locus of the straight line is the same as the travel of the slider for 90 degrees rotation of the crank. With the industrial robot according to Patent Document 1, a main arm member (the first arm 31 in Patent Document 1) and a sub arm member (the second arm 32 in Patent Document 1) have fixed thicknesses to secure a desired rigidity (have fixed width and thickness dimensions in cross-sections orthogonal to longitudinal directions of both of the arm members), and thus, as base end parts of both of the arm members (end parts on the screw shaft 21 side in Patent Document 1) are spaced from each other, the arm members interfere with each other at a coupling position of both of the arm members, and a problem arises that the tip end part of the main arm member (end part on the side where the holder H is provided in Patent Document 1) cannot be moved proximally to the sub arm member (a problem arises that the holder H is hard to be moved close at hand to the screw shaft 21 side). The Scott-Russell mechanismThe structural application of flexure hinges in the SR amplifying mechanism is especially important to practically play an important role in the positioning stage and precision cutting. SQUSE INC., JAPAN, Free format text: wherein a rotation unit having a rotor is coupled to the pivoting member. 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. 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, in the present invention, pivoting member is pivotably coupled to the joint unit and the rotation unit having the rotor is coupled to the pivoting member. The Scott-Russell mechanism gives a theoretically linear motion by using a linkage form with three portions of the links all equal, and a rolling or sliding connection. Lever Mechanisms," Published in "Mechanisms in Modern Engineering Design, Drive mechanism and manufacturing apparatus, Based on the collapsible explorer mechanical arm of triangle configuration link transmission, unit for transferring a substrate and apparatus and method for treating the substrate with the unit, Device for carrying out a phase-locked linear displacement of two shafts arranged in parallel. 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. The present invention can be switched, as for the joint unit attached to the tip end of the main arm, to the total of two ways of pivoting including the pivot cooperating with the angle change of the arm members at the coupling position and the pivot independent from the angle change, and thus the Scott Russell mechanism device can suitably be used for various applications. 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. It consists of both sliding and turning pairs Download Solution PDF Share on Whatsapp 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. In the present invention, the joint unit pivotably coupled to the tip end part of the main arm member can be pivoted in the 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 to the angle change. an angle changer for changing a coupling angle between the main arm member and the sub arm member. Moreover, in the present invention, the gripping unit is attached to the tip end side of the pivoting unit. 19, 2012, WIPO, 4 pages. Scott-Russell mechanism. 1. Freemantle straight-line linkage from British Patent 2741, November 17, 1803. 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. Therefore, the rotation unit attached to the joint unit via the pivoting member can displace its rotor independently of the displacement of the tip end part of the main arm member.