Expansion coupling sleeve is abbreviated as expansion sleeve, which is an advanced basic component widely used for mechanical coupling under heavy loads in the world. "Jingji Technology" is one of the recommended enterprises for the heavy-duty standard of expanded sets of products and one of the manufacturers of heavy-duty standards. Adhering to the company's pioneering and innovative development ideas, it also strives for excellence in traditional products and continues to explore in order to meet the higher requirements of users. , Developed its own patented products Z25 and Z26 expansion coupling sleeves. At the same time, Jingji Enterprise has the most professional technical team, adopts more advanced design methods, selects high-quality raw materials, and uses advanced processing technology and processing equipment at home and abroad.

Three-phase permanent magnet synchronous motor for mine hoisting equipment is the first research and development product of our company in the industry. The motor is excited by permanent magnet materials to realize low-speed and high-torque power transmission. The frequency converter is used to control the motor, which can directly drive the mine hoisting equipment. It has simple structure, compact layout, gearless direct connection, four-quadrant operation, high efficiency and energy saving, large starting torque, strong overload capacity, soft start, soft stop, soft impact, The advantages of high control precision, high reliability, small size, convenient installation, and maintenance-free system.