Jack is a very common light and small lifting equipment with a wide range of applications. It is not only the main lifting tool indispensable for car maintenance and repair, but also has a wide range of applications in construction, railways, bridges, and emergency rescue. With the development of my country’s national economy and automobile industry, automobiles have generally entered the households of ordinary people, and the output of passenger cars has increased year by year. The increase in the number of cars has made the demand for jacks increasing.
Jack technology in our country started late. Around the 1970s, we gradually came into contact with foreign jack technology, but the level and technology of domestic manufacturers at that time were uneven and lacked a unified plan. After several rounds of national joint design, the establishment of industry standards and national standards, the standardization, serialization and generalization of domestic jack production have been implemented. Take the vertical hydraulic jack as an example. According to national standards, common general-purpose parts have basically been professionally produced, the output has been increasing, and the product cost has been reduced.
With the application of technologies such as fast lifting and slow oil return, my country’s jack products have been greatly improved in terms of bearing strength, service life, safety performance, cost control, etc., and the product quality has gradually approached and surpassed most similar foreign products. Products, and further open the European and American markets.
At present, the jack series exported by our country are complete in categories and specifications, with stable product performance and strong international competitiveness.
“The principle of the jack is a light and small lifting device that pushes heavy objects within a small stroke of the top bracket or the bottom claw. Different types of jacks have different principles. Common hydraulic jacks use Pascal’s law, and That is, the pressure of the liquid is consistent throughout, so that the piston can be kept still. The screw jack uses the reciprocating handle to push the ratchet gap to rotate, and the gear rotates to raise and lower the sleeve to achieve the function of lifting and pulling force.