gear model technology small production diy material package primary and secondary school science toy chain tooth plate transmission experiment 齿轮模型 科技小制作DIY材料包中小学科学玩具 链条牙盘传动实验

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Product Name: KX19X8 Gear Model

Model Number: KX1938
Size: 150*75*27 mm
Weight: Approximately 100g
Material: wood + metal components + chains.
Color: Wood Tone
Battery usage: No
Packaging: 500 pcs
Box dimensions: 600*450*550mm

The main mechanism of the bicycle is that the force applied by the rider to the chainring drives the chain, which then exerts work on the rear cog. Next, let’s conduct this experiment together. In 1790, a Frenchman named Sifflatte was particularly inventive. One day, while walking on a street in Paris, the ground was covered with rainwater due to previous rain, making it difficult to walk. Suddenly, a four-wheeled carriage rushed towards him from behind. The street was narrow, and the carriage was wide, so Sifflatte managed to avoid being hit but still got covered in mud and rain. Others felt sorry for him and even cursed, trying to stop the carriage and negotiate. However, Sifflatte simply said, “Don’t shout, don’t shout—let them go.” After the carriage moved away, he stood there, thinking: With such a narrow road and many pedestrians, why couldn’t the carriage’s design be changed? Perhaps half of the carriage could be cut off, with two wheels at the front and two at the back... With this idea in mind, he went home and began designing it. After repeated experiments, the first “wooden horse wheel” bicycle was created in 1791. This earliest bicycle was made of wood, with a simple structure—no driving or steering mechanism. The rider had to push with both feet to move forward, and to change direction, he had to get off and move the bike around. Even so, when Sifflatte rode this bicycle around the park, everyone was amazed and impressed.

Cycling is a semi-mechanized sport. Coaches and athletes should understand certain mechanical principles and physics knowledge, effectively utilize transmission ratios, properly manage exercise intensity, and wisely conserve energy consumption, thereby enabling high-quality and efficient scientific training with abundant stamina. A bicycle is a mechanical device with transmission systems that include: the driving gear (commonly known as the wheel hub), the driven gear (commonly known as the cog), chains, and gearboxes. The gear ratio is related to the efficiency of cycling; coaches and athletes should know how to calculate and apply these data. The gear ratio refers to the ratio of the number of teeth on the driving gear to that on the driven gear.

If the number of teeth on both gears is the same, then with each pedal stroke, both the two gears and the rear wheel rotate one full turn. If the number of teeth on the driving gear is greater than that on the driven gear, then with each pedal stroke, the driven gear rotates more than one full turn, resulting in higher speed. Therefore, the gear ratio is directly proportional to the number of teeth on the driving wheel and inversely proportional to the number of teeth on the driven wheel. Let G represent the gear ratio, C represent the number of teeth on the driving gear, and F represent the number of teeth on the driven gear. Their relationship is expressed by the formula:

G=C÷F

For example: The gear train of ATX830 has 44 teeth (number 3), and the flywheel has 11 teeth (number 9). By substituting these values into the formula, the gear ratio can be calculated:

G=C÷F=44÷11=4

In other words, when the pedals move one full circle, the flywheel rotates four times.

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 scientific series in physics, chemistry, energy, geography, biology, art, and more 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 advance the development of “Teacher Xing.” 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!