Company Profile Founded in 2004, located in Zhangqiu City Industrial Park Township shallow wells. Company employees in a "standardized management, quality, customer satisfaction," the quality, our company will strive hard work, high efficiency and high standards to fulfill their commitments, inexpensive high-quality products and excellent service with You embark on the cause of Tengda road. The company dedicated to working closely with the broad masses of people, and seek common cause, create brilliant. Contact: Jiajing Li Mobile: 15098766773 Website: www.zqhaihua.com Address: Zhangqiu City Industrial Park Township Asai mechanical transmission, power can be provided by way of motion, to change direction or speed, had been a purpose utilized. Ancient actuator type of lot of applications, in addition to the above described, like seismograph, blowers, etc., are the product of a mechanical transmission mechanism. China's ancient transmission, mainly gear, rope drive and chain drive. Gear. It appears no later than the Western Han Dynasty, the Western Han Dynasty guide car, recording drum car on hydraulic Han astronomical instruments invented by Zhang Heng, gear used quite complex gear system. The gear is used to transmit motion, strength less demanding. As for the production of gear used to transmit large power, force generally larger, higher strength requirements. When using the ancient animal, hydro and wind were carrying water, food processing, etc., should be the application of such gear. For example, in the roll-over, to be applied in stage gear transmission mechanism to change the position and movement of the transfer, adaptation overturned job requirements. Tower crane models tip the upper arm function is to bear the rope and the rope came load balancing arm and by rotating turret tower, bearing blocks and other structural components of the formula is passed directly through to the turret tower structure. Since there is a truncated cone-liter overhead-column, after forward or backward truncated cone column, Renzi Jia style and bracing frame. Those who are required to set up the rotary tower crane counterweight, its function is to support the counterweight to constitute a role opposite direction and lifting torque design balance required torque. In addition to the counterweight, but also often installed in its tail lifting mechanism. The reason why lifting mechanism with a counterweight mounted trailing arms together in the balance, you can assign a weight to play the role of the Ministry and, secondly, increasing the distance between the rope reel and the spire of the guide wheel between rows to facilitate rope around and avoid arbitrary justice phenomenon. Counterweight inversely related to the amount and length of the balance arm, and then there is a certain proportion between the balance arm length and boom length. A considerable amount of counterweight, light tower machines generally at least 3 ~ 4t, heavy to nearly 30t. Slewing ring is nearly four decades the gradual rise in the world of new mechanical parts, which have inner and outer rings, rolling, etc., at present, China's production of slewing ring shape, mainly in the early 1980s designated by the Ministry of Machinery Industry Tianjin Engineering Machinery Institute organized the introduction of the former Federal Republic of Germany Rothe Erde company's design and manufacturing technology. December 20, 1984 issued the People's Republic of China Machinery Industry Standard: JB / 2300-84 "slewing ring type, basic parameters and technical requirements", mainly by machinery and electronics industry in Tianjin Institute of Mechanical Engineering, Xuzhou rotary bearing plant is responsible drafting, and later the state has issued building mechanical standards in 1991: JB36.1-36.3-91, in 1999 and 2011 has released new mechanical industry standard JB / 2300-1999 and JB / 2300-2011.