Recent Patents on Mechanical Engineering - Volume 14, Issue 4, 2021

Background: Search and rescue in high-risk situations and searches in unknown environments pose certain threats to human life. The development of mobile robots with exploratory capabilities that can be adapted to complex sites with high mobility and high obstacle-crossing capabilities is, therefore, a research trend. Existing wheeled and tracked mobile robots have excellent locomotion, but they are less adaptable and less Read More

Background: Angular contact ball bearings are the most popular bearing type used in the high speed spindle for machining centers. The performance of the bearing directly affects the machining efficiency of the machine tool, obtaining a higher dm136;™n value is the direction of its research and development. Objective: By analyzing the research achievements and patents of electric spindle angular contact bearings, Read More

Background: Completing the transition from a sitting position to a standing position is a major activity in people’s daily lives and is crucial for independent living. Lower limb dysfunction will bring many inconveniences into a person’s life and greatly affect their quality of life. Patients with lower limb dysfunction are a specialized group, and nursing problems for this group are becoming increasingly serious. Helping patients Read More

Background: The overflow valve, as an essential pressure control element, is widely applied in various hydraulic transmission systems because of its characteristics of constant pressure overflow, stable pressure, system’s unloading and safety protection. The research on the structure and working principle of the overflow valve is beneficial to improve the working efficiency and operating stability of pressure control of the h Read More

Background: The collection of temperature is very important in life. Thermistor temperature sensors are an important part of the temperature acquisition system. Thermistor temperature sensors can convert the temperature signal into an electrical signal for output. Due to the different application fields and technical requirements, the shape, function, and structure of thermistor temperature sensors are very different. O Read More

Background: With the rapid development of automobile technology, the problem of abnormal door-closing noise has attracted more and more attention. The abnormal door-closing noise is an important factor for judging the quality of a car, so accurate identification of abnormal noise is the premise of fundamentally solving the abnormal noise. Objective: To accurately identify the abnormal sound of car closing through the im Read More

Background: Shock absorbers are the main damping component of vehicle suspension system, whose excellent passive characteristics can greatly improve and guarantee the ride comfort and handling stability of vehicles. Therefore, it is of great significance to research and develop a shock absorber with excellent passive characteristics. Objective: The purpose of this paper is to propose and design a bionic three-link tube sh Read More

Background: Demands for Precise positioning systems are dramatically increasing in various fields. So, it is crucial to find and address their issues in order to improve their performances. In this regard, scholars have tried to detect the challenges with which these systems are faced. Some most important problems introduced by scholars are short stroke, low dexterity, complicated structure, lack of compact size, low output force Read More

Background: Three-dimensional (3D) printing is an emerging technology, capable of manufacturing a solid layer by layer. With the advancements of materials for 3D printing, this technology is applicable in almost every sector. But in accordance with the product requirements, we need to modify the mechanical properties of the material. To achieve a good surface finishing we require coating of filament. For this purpose, an appar Read More

Aim: The aim of this study is to develop machine learning models for the performance of refrigerator and air-conditioning system. Background: The Coefficient Of Performance (COP) of Refrigerator and Air-Conditioning (RAC) is a complex function of evaporative temperature and concentration of nanoparticles in lubricants. In recent years, researchers have focused on experimental studies for the improvement of COP. Further, few Read More

Background: The increased global obesity rate presents a major public health issue for people of every age group belonging to all regions. Obesity increases health risks, such as cardiovascular disease, cancer, diabetes, osteoarthritis, and chronic kidney diseases. At present, we have all faced the impact of the damage caused by COVID-19. All past researches and traditional weight machines were found to be either plate-loade Read More