Views: 0 Author: Site Editor Publish Time: 2022-09-26 Origin: Site
The old tramcar traction mode is to pull the screw through the contact to transfer the force to the hook frame, and drive the motor car through the hook frame. The most vulnerable parts are the screw and nut for pulling the screw. The screw diameter is 50mm, and M48 is equipped × 4. Nuts and screws mainly bear axial tension. The maximum traction force of the tramcar is 60 kN. After flaw detection, the screw can fully bear the tension if there is no internal crack or damage. However, due to the limitation of processing quality, the force between the screws after tightening is often uneven. If the force bearing part is small, the wire may fall off.
The traction device of the new mining car has changed the style of the head and the end bracket. The head is connected with the end bracket and the car body through the traction pin shaft. The lower part of the end bracket is square box type, which can not only be used as the bearing part of the buffer spring, but also increase the contact area with the traction pin shaft. The end bracket and the car body are riveted together. The traction force is transmitted to the end bracket through the head and the pin shaft to drive the car body to run. Among the main force bearing components, the weakest link is the traction pin, which is made of 45 # steel with a diameter of 50 mm. The shear force it can withstand is about 600 kN, which is far greater than the maximum traction force borne by the tramcar. It fully meets the mine safety requirements. Therefore, the tramcar will not drop due to the damage of the traction device during its operation. At the same time, the coupler frame, pull screw and other components are omitted, saving production costs.
Recently, the Jining High-tech Zone General Trade Union and the Human Resources Department of Jining High-tech Zone jointly announced the 2024 'High-tech Craftsman' list. Li Zhenbo, General Manager of Information Technology at China Coal Group and General Manager of Zhongyun Group, was awarded the title of 'High-tech Craftsman' for his outstanding contributions and innovative spirit.
On September 30th, China Coal Group held a grand cultural performance to celebrate the 75th anniversary of the founding of the People's Republic of China with the theme of 'Forging Ahead to Celebrate the Birthday of the People's Republic of China' in the conference center. The chairman of China Coal Group, Mr. Qiu Qing, the general manager of China Coal Group, Mr. Han Yong, and all the members of the leadership team of China Coal Group attended the event and witnessed the grand celebration together with more than 1,000 employees on the spot. The cultural performance was conducted in the way of 'on-site + webcast', aiming to show the spirit of the cadres and workers of China Coal Group and express the love and blessing to the great motherland through colorful cultural programs.
On September 29th, in this season of autumn and fruitfulness, China Coal Group, full of joy and pride, participated in the ‘Harvest Celebration and National Day’, which was jointly organized by Jining Hi-Tech District Federation of Trade Unions and Jiezhuang Street to welcome the 75th anniversary of the founding of New China and the Farmer's Harvest Festival.
