Negative Compressibility in the Monoclinic Octahedron Model Constructed by Hinging Wine‐Rack Mechanism

2020 ◽  
pp. 2000389
Author(s):  
Meng Ma ◽  
Xiaoqin Zhou ◽  
Hao Liu ◽  
Haocheng Wang
Keyword(s):  
Rack Mechanism

Study on Mechanical Automation with Design of Rapid Milk Detector Based on Freezing Point

2013 ◽  
Vol 703 ◽  
pp. 282-286
Author(s):  
Ren Cai Zhang ◽  
Xiang Yu ◽  
Xing Ju Liu ◽  
Jin Hai Zhai ◽  
Zhen Wu Ning
Keyword(s):  
Integrated Circuit ◽  
Temperature Sensor ◽  
High Efficiency ◽  
Freezing Point ◽  
Electronic Control ◽  
Freezing Point Depression ◽  
Electronic Control System ◽  
Freezing Curve ◽  
Rack Mechanism

An efficient automated milk detector based on freezing point depression is designed. This detector shares characters of high efficiency and good stability with accuracy and automation. Its main parts include temperature sensor of IC (Integrated Circuit), pinion-rack mechanism and crank-rocker mechanism and electronic control system. Monitoring in-situ change of milk freezing curve and developing efficiency of sampling can be available by means of pinion-rack mechanism and IC temperature sensor mechatronics design. As a result, adulterating status of milk can be discriminated in a rapid and accurate and automated way. The detector may be employed to detect liquid foods other than milk as well.

A New Portable Toilet Design and Optimization

2011 ◽  
Vol 287-290 ◽  
pp. 2888-2891
Author(s):  
Chun Jie Yang
Keyword(s):  
Cost Analysis ◽  
Practical Application ◽  
Design And Optimization ◽  
Rack Mechanism ◽  
Application Prospects

This paper introduced a new toilet design that can be moved conveniently and adjust the height of the pedestal pan to suit the needs for different customers. The main driving device in the support consists of gear and rack mechanism. The product satisfied the needs through testing of a prototype in the laboratory. The principle of the design and structure of the toilet are illustrated and provided ProE simulation. The possibility of practical application and cost analysis and application prospects are developed in this paper.

scholarly journals INCREASING THE RIGIDITY OF THE SELF-CENTERING DEVICES OF LATHES

2021 ◽  
Vol 6 (2) ◽  
pp. 100-106
Author(s):  
A. Seregin ◽  
I. Nikitina ◽  
S. Krylova
Keyword(s):  
Load Distribution ◽  
Structural Changes ◽  
Engineering Problem ◽  
The Self ◽  
Elastic Displacement ◽  
Adjacent Pair ◽  
Complex Engineering ◽  
Technical Solutions ◽  
Rack Mechanism ◽  
Positive Results

Increasing the rigidity of universal self-centering devices is one of the topical trends in the design of machine tooling. Calculation of the load distribution between the turns and teeth of a spiral rack and pinion mechanism is a complex engineering problem. When working on the article, it was revealed that an adjacent pair of turns and teeth that are in engagement does not always coincide with a geometrical adjacent pair due to the error in the execution of turns and teeth along the pitch and profile. This is based on experimental data and the proposition that errors in the pitch and profile of the spiral determine the nature of the working pressures in the engagement of the turns and teeth. The article discusses technical solutions in which the rigidity of self-centering devices increases without significant structural changes due to the establishment of the correspondence of the algorithm for changing the elastic properties of parts of the spiral-rack mechanism to the algorithm for changing the load between the bearing elements. Constructive solutions based on the implementation of elastic displacement of the first most loaded turn are proposed, which allows to reduce the interference between the tooth of the cam rack and the turn of the disk spiral. This circumstance contributes to the redistribution of the load in the engagement of the bearing elements of the spiral-rack mechanism. The tests of the developed structures were carried out, which gave positive results.

Design and implementation of a variable stiffness actuator based on flexible gear rack mechanism

Robotica ◽  
2017 ◽  
Vol 36 (3) ◽  
pp. 448-462 ◽  
Author(s):  
Wei Wang ◽  
Xiaoyue Fu ◽  
Yangmin Li ◽  
Chao Yun
Keyword(s):  
Joint Stiffness ◽  
Variable Stiffness ◽  
Power Cost ◽  
Linear Elastic ◽  
Mechanics Model ◽  
Angular Deflection ◽  
Rotational Joint ◽  
Gear Rack ◽  
Rack Mechanism ◽  
Flexible Gear

SUMMARYVariable stiffness can improve the capability of human–robot interacting. Based on the mechanism of a flexible rack and gear, a rotational joint actuator named vsaFGR is proposed to regulate the joint stiffness. The flexible gear rack can be regarded as a combination of a non-linear elastic element and a linear adjusting mechanism, providing benefits of compactness. The joint stiffness is in the range of 217–3527 N.m/rad, and it is inversely proportional to the 4th-order of the gear displacement, and nearly independent from the joint angular deflection, providing benefits of quick stiffness regulation in a short displacement of 20 mm. The gear displacement with respect to the flexible gear rack is perpendicular to the joint loading force, so the power required for stiffness regulating is as low as 14.4 W, providing benefits of energy saving. The working principles of vsaFGR are elaborated, followed by presentation on the mechanics model and the prototype. The high compactness, great stiffness range and low power cost of vsaFGR are proved by simulations and experiments.

Design of Variable Stiffness Actuator Based on Modified Gear–Rack Mechanism

2016 ◽  
Vol 8 (6) ◽  
Author(s):  
Wei Wang ◽  
Xiaoyue Fu ◽  
Yangmin Li ◽  
Chao Yun
Keyword(s):  
Mechanical Design ◽  
Joint Stiffness ◽  
Elastic Beam ◽  
Variable Stiffness ◽  
Uncertain Environments ◽  
Mechanics Model ◽  
Speed Reducer ◽  
Stiffness Profile ◽  
Gear Rack ◽  
Rack Mechanism

Variable stiffness actuators (VSAs) can improve the robot's performance during interactions with human and uncertain environments. Based on the modified gear–rack mechanism, a VSA with a third-power stiffness profile is designed. The proposed mechanism, used to vary the joint stiffness, is placed between the output end and the joint speed reducer. Both the elastic element and the regulating mechanism are combined into the modified gear–rack (MGR), which is modeled as an elastic beam clamped at the middle position. Two pairs of spur gears are engaged with the rack and considered as the variable acting positions of supporting forces. The joint stiffness is inversely proportional to the third power of the gear displacement, independent from the joint position and the joint deflection angle. The gear displacement is perpendicular to the loading torque, so the power consumed by the stiffness-regulating action is low (14.4 W). The working principle and the mechanics model are illustrated, and then, the mechanical design is presented. The validity of the VSA is proved by simulations and experiments.

scholarly journals Eco-friendly innovation gripping systems actuated by pneumatic muscles

2019 ◽  
Vol 3 (2) ◽  
pp. 8-13
Author(s):  
Keyword(s):  
Industrial Robot ◽  
Pneumatic Muscle ◽  
Pneumatic Muscles ◽  
Rack Mechanism

The paper focuses on the development of innovative, bionic, eco-friendly and light gripping systems. Within this broader context the paper presents and discusses four innovative constructive solutions for a gripping system mountable on an industrial robot, based on actuation by a linear pneumatic muscle and transmission of motion by gear and rack mechanism. The method underlying the development of these novel

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