Straight line mechanism

About: Straight line mechanism is a research topic. Over the lifetime, 36 publications have been published within this topic receiving 175 citations.

A Synthesis and Optimal Method for Straight Line Mechanism with Burmester Points

Abstract: When a Burmester point coincides with the Ball point at the inflection circle pole, given a fixed joint and the point, which is on the expecting straight-line and direction can synthesize an infinite number of mechanisms with coupler curve having a five-point contacts with its tangent, namely, Burmester point. Any displacement is corresponding to three four-bar straight-line linkages with the synthesis formulations given. The property charts, which include the bar ratio, the sum of bars, the relative straight-line length, mechanism types, and so on, are drawn by developing a mechanism software based on vc++6.0 with the solution region method. So the users can find out the involved linkages information intuitively, and also the aimlessness in choosing optimal mechanisms is avoided effectively.

Machine is gone into to fill up by one three type orthoscopic bottle lid

Abstract: The utility model discloses a machine is gone into to fill up by one three type orthoscopic bottle lid, involving vibrations dish, frame, straight line mechanism, advance gasket mechanism, pressure pad piece mechanism, unloading mechanism, slide mechanism and positioning mechanism, the vibration dish sets up in frame one side, and the bottle lid is placed in the vibration dish, and straight line mechanism installs in the frame, is provided with the track groove on the vibration dish, and dock with the one end of direct mechanism in the track groove, enter gasket mechanism and pressure pad piece mechanism sets gradually in the frame, and lie in same one side of straight line mechanism, and slide mechanism installs in the frame, and positioning mechanism sets up on slide mechanism, and slide mechanism and positioning mechanism lie in straight line mechanism's opposite side, and the setting of unloading mechanism is at the other end of direct mechanism, entering gasket mechanism and including gasket seat and pressure head seat, the interval is provided with three gasket groove on the gasket seat, and vacuum pressure head on the pressure head seat is the same with the quantity in gasket groove The utility model discloses can realize " one three ", further improve production efficiency

Intermittent feeding device for work

Abstract: PURPOSE:To provide a feeding device capable of fine adjustment to secular change of the feed rate of a running work by moving a movable pin lineally with an approximate straight line mechanism for the intermittent feed of the work and connecting the movable pin with a reciprocating member. CONSTITUTION:In a work feeding device, the work 3 is transferred by rotating a clamp member intermittently round a support member. The movable pin is moved lineally with an approximate linear mechanism composed of a link mechanism. The approximate linear movable pin is connected with the reciprocating member. The work 3 is clamped by a pair of roller members 10, 20, rotated intermittently and transferred. By this method, it is possible to obtain the feeding device capable of fine adjustment to the secular change of the feed rate of the running work 3.

Design of compliant micro-stage based on Peaucellier-Lipkin straight-line mechanism

Abstract: Design of small robotic positioning devices is required for some special tasks in field of robotics. In the case that workspace is smaller as 1mm then only compact compliant devices could be utilized. But in the case that straight-line output motion is required too; the design of such devices is more complicated, because the parasitic deformations must be minimized. As suitable solution is seemed combination of principles straight-line devices and compliant mechanisms in design process. This paper deals with design procedures for device based on compact compliant mechanical structure, where kinematical structure of Peaucellier-Lipkin straight-line mechanism was utilized. Design problems of transformation between straight-line mechanisms and flexure structures are discussed.

Design of Compliant Mechanism Microgripper Utilizing the Hoekens Straight Line Mechanism

Abstract: Precision engineering industries demand devices with high-precision motion, the manipulation of micro-objects in particular, which is a highly challenging task. The microgripper is an essential device during the micromanipulation of objects. Precision manipulations of objects entirely depend on the design of the microgripper and are complicated to achieve using the conventional rigid link mechanism. The compliant mechanism is found to overcome the complexities of the rigid link mechanism in precision applications. The micro-object may slip or slide during gripping and releasing, which can be controlled through parallel movement of the gripping jaws. This research article focuses on the design of a compliant microgripper with parallel moving jaws by employing the Hoekens straight line mechanism. The Hoekens mechanism consists of binary and ternary revolute joints, which demand a special type of flexure hinges. Hence, the article introduces the cartwheel type of flexure hinges, as cartwheel-type flexure hinges are more suitable to achieve rotational deformation, values approximating nearly to that of the traditional revolute joint when it transfers motion between fixed and moving links. The outer rim of the cartwheel is modified to allow ternary and binary joints between moving links. Cartwheel is designed with curved flexure arms that are limited to eight numbers of flexures. The structural behavior of the cartwheel is analyzed by varying numbered flexures from 1 to 8. The minimum number of flexure arms required for having better rotational performance is determined through Finite Element Analysis (FEA). An appropriate type of cartwheel is positioned in the mechanism. The structural performance of the designed microgripper is carried out through FEA, and its parallel movement is verified. The microgripper is fabricated from structural steel through wire Electrical Discharge Machining (EDM) technique and actuated using Shape Memory Alloy wire. The displacement of the microgripper jaw is experimentally measured, and the results show a promising improvement.