stem science laboratory diy homemade hand crane crane technology small production small invention engineering science STEM科学实验室DIY自制手摇起重机吊机 科技小制作小发明工程科学

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Note: 1.8 yuan is the price for a small block, not the total package price

Product Name: KX1916 Hand Crank Crane (Lifting Machine)
Model Number: KX1916
Size: 270*70*230 mm
Weight: Approximately 100g
Material: plastic components + pulley + screws + binding wire + wire....
Color: Mixed red and yellow
Battery usage: No
Packaging: 200 pcs
Box dimensions: 600*450*550mm

The ancient Greeks classified pulleys as simple machines. As early as 400 BC, the ancient Greeks already knew how to use compound pulleys. Around 330 BC, Aristotle discussed the compound pulley system in his eighteenth problem in "On the Laws of Mechanics". Archimedes contributed much knowledge about simple machines and explained the kinematics theory of pulleys in detail. It is said that Archimedes alone used a compound pulley to pull a large ship loaded with goods and passengers. In the first century AD, Alexander the Great’s Hero analyzed and wrote down theories on compound pulleys, proving that the ratio of load to force applied is equal to the number of rope segments carrying the load, which is known as the "pulley principle".

The pe self-seal bag packaging should not come with colored instructions book

Experimental objectives: 1. Gain a basic understanding of mechanical and mechanical principles.
2.
Know the applications of cranes in daily life.

3. Understanding the structure of pulleys helps distinguish between fixed pulleys and movable pulleys.

Scientific Production:

1. Identify and prepare the materials required for the experiment.
2. Follow the instructions in the manual step by step for installation.
3. After installation, proceed with debugging.

Scientific Principles:

Pulley system: A pulley device composed of a fixed pulley and a movable pulley. It saves effort and can change the direction of force. However, it does not save work, as the pulley system uses more distance despite saving effort. To achieve both efficiency and the ability to change the direction of force, the fixed pulley and movable pulley can be combined into a pulley system.
A pulley system is composed of several fixed pulleys and moving pulleys, which can achieve both effort reduction and direction change of force. During use, the amount of effort reduction and the way the rope is wound depend on the performance of the pulley system.
Features: A pulley system hangs objects using several sections of rope. The force required to lift the object is only a fraction of the total weight. One section of the free end of the rope is counted when it passes around the moving pulley, while none is counted when it passes around the fixed pulley. Although the pulley system reduces effort, it increases the distance traveled; the distance moved by the power source is greater than the distance the load moves. The amount of increased distance depends mainly on the number of sections the fixed pulley creates with the rope. By conducting experiments with the pulley system, it is easy to see that although it saves effort, it increases the distance—the distance moved by the power source is greater than the height the load rises.

Knowledge Treasure:

A pulley is a simple machine used to lift heavy objects and reduce effort. A pulley is a small wheel with grooves around it that can rotate around a shaft. A simple machine that consists of a disc with grooves that can rotate around a central axis and a rope (cord, tape, wire, chain, etc.) crossing over the disc is called a pulley.

Scientific Expansion:

In mechanics, a typical pulley is a circular wheel that can rotate around its central axis. There are grooves on the circumferential surface of the wheel, and ropes are wound around these grooves. When either end of the rope is pulled forcefully, the friction between the rope and the pulley causes the pulley to rotate around the central axis. A pulley is essentially a modified, rotatable lever. Its primary functions include pulling loads, changing the direction of force application, and transmitting power, among others. A mechanism composed of multiple pulleys is called a "pulley system" or "multiple pulley". Pulley systems offer greater mechanical advantage and can handle heavier loads. Pulleys can also serve as components in chain or belt drives, transferring power from one rotating shaft to another. Based on whether the position of the pulley's central axis moves, pulleys are classified as "fixed pulleys" or "moving pulleys"; fixed pulleys have a stationary central axis, while moving pulleys have a movable central axis, each with its own advantages and disadvantages. By assembling a fixed pulley and a moving pulley together, a pulley system is created, which not only reduces effort but also allows the direction of force to be changed.

Below is the detailed installation diagram

Zhejiang Jianyi Education Technology Co., Ltd.
Zhejiang Jianyi Education Technology Co., Ltd. (formerly Yifei Toys Factory)Established in 2007, the current brand names include “XING TEACHER” and “JIAN YI”. Through 10 years of relentless effort, the company has gradually matured. Our firm is a member of the Ministry of Education’s Teaching Equipment Industry Association and a key enterprise in Zhejiang Province’s teaching equipment sector. For three consecutive years, it was recognized by Jinhua City as a “Contract-Abiding and Creditworthy” entity, and in 2014, it was awarded the title of “Advanced Enterprise in Jinhua Teaching Instruments Industry” by Zhejiang Province.
Zhejiang Jianyi Education Technology Co., Ltd. is a high-tech enterprise that integrates modern scientific research and development of educational equipment, curriculum design, integrated teaching resources, and technical services. With its high-tech products and modern educational equipment, Zhejiang Jianyi Education Technology Co., Ltd. sells its products across the country and to Europe, America, Japan, South Korea, and other regions. After years of accumulation, the company has reached a certain scale. In terms of technological innovation, the company has professional designers who develop complete sets of educational products and upgrade existing products. In terms of production, management, and installation services, the company strictly adheres to the standards of the ISO9001 international quality assurance system. In marketing, the “Teacher Xing” products have been introduced to many provinces and cities in China and enjoy a good reputation. Over the years, it has provided high-quality, advanced, and professional series of modern teaching equipment and specialized R&D and customization services for the education sector. With excellent, highly qualified professionals, comprehensive after-sales service, high product quality, and a positive corporate image, the “Teacher Xing” educational and physical science series, chemistry series, energy, wind, geography, biology, art, and more products have won multiple bids in education bureau tenders. Zhejiang Jianyi Education Technology Co., Ltd. continues to uphold the business philosophy of “ultimate quality, diligent service, and sincerity in people,” maintain the “Teacher Xing” culture, build the “Teacher Xing” brand, and pursue the development strategy of the “Teacher Xing” enterprise. It provides excellent equipment and high-quality services for school teaching and research. We are willing to cooperate wholeheartedly with new and old friends at home and abroad, work together, and serve education with all our efforts and contribute to the education industry.

Please check that the circuit is unobstructed and all components are intact before assembly, as well as ensure all contact points are properly aligned. During assembly, be careful not to let glue get on your clothes or skin. Keep the components out of reach for younger siblings to prevent them from accidentally swallowing them! Do not play with them on your head, as the model may fall and hurt you!