With the widespread recognition of industrial robots in various industries, in recent years, more and more companies have begun to increase the application of industrial robots in production lines. The industry fields and production line processes they cover, It has also gradually extended from the original concentrated automobiles, food, medicines, welding, etc. to more areas. The performance of industrial robots is therefore challenged by more diverse process requirements.
As an important industrial robot mechanism, the parallel robot has many advantages such as small motion inertia, small footprint, small cumulative error, high control accuracy, and fast speed due to its structural advantages. In industries such as food, medicine, 3C electronics, and printing that have strict requirements on production capacity improvement, processing accuracy, and hygienic conditions, parallel robots have become the best choice for rapid packaging, sorting, transfer, and other processes.
The mechanical structure of the parallel robot consists of a static platform, a driving arm, a driven arm, a moving platform and an intermediate shaft. Among them, the moving platform (also called a movable plate), which is an important part of the parallel robot, It is a direct output mechanism for parallel robots to realize motion trajectories. The spatial range that the moving platform can reach directly affects the path span during the end picking and placing process, and even the incoming material speed and conveyor belt running speed. The design at the end of the intermediate shaft not only serves as a mechanism to connect the fixed disk and the rotating disk, but also directly affects the angle and accuracy during the rotation process. That is to say, when the parallel robot is completing a certain sorting and sorting process, the larger the moving platform space is, the robot can pick up and place materials in a wider range. If the incoming materials are in various positions, the rotation of the intermediate shaft will The high speed makes it more flexible for handling items on the conveyor belt, switching lines, and picking and placing under high-speed operation.
In short, the stability and flexibility of the structure will directly determine the accuracy of the end movement and the functions that the robot can achieve.
In practical market applications, we often encounter customer demands for large angles of end rotation, which is an important issue for parallel robots. Because after the pneumatic device is installed on the movable plate, it is restricted by the trachea. During the rotation, the trachea will become entangled and the trachea interface will loosen and fall off due to rotation. During the reciprocating process of high-speed pick-up, placement, and rotation of the parallel robot's movable disk, the winding, loosening, and shedding of the trachea are aggravated. Not only that, while these problems exist, the wear of the trachea is also more serious. In the process of realizing flexible operation of the end of a series of movable discs, inevitable problems occur frequently. In actual production, it not only becomes a constraint on the rotation angle of the movable discs, but also becomes a constraint on the rotation angle of the movable discs. It addresses customers’ concerns when choosing to use parallel robots.
Bekent, which "works side by side with customers and is customer-oriented", has already carried out structural optimization on this in 2017 and started to develop a rotatable movable plate with an air path - a closed air slide. Ring, that is, on the basis of ensuring the airtightness of the air path, the movable plate can rotate at any angle.
The closed air slip ring integrates the air path into the rotatable movable plate. Through the structural modification of the movable plate and the lower rotating plate, the air path is integrated into the closed pneumatic device. The air from the intermediate shaft enters through the air inlet on the fixed plate, passes through the sealed space between the movable plate and the lower rotating plate, and is transmitted to the air outlet on the lower rotating plate. At the same time, the upper and lower ends of the sealed space are sealed by O-rings. Sealing realizes the connection of air paths, solves the problem that the rotation angle of the existing movable plate is limited by the air pipe when installing a pneumatic device, reduces the impact of the winding of the air pipe on the large rotation angle of the movable plate, and increases the flexibility of the movable plate.
This structure is one of the important standard structural configurations of Bekent’s parallel two plus one axis and three plus one axis. The flexible rotating structure allows customers to get more convenience during use, thereby reducing the need for assembly. The design of the line is concerned about the angle of incoming and outgoing materials. As Bekent's flagship product, the parallel robot series with three plus one axis has been greatly recognized by customers for its solid structural design and performance level. It has become Bekent's star product in 2018, and sales have continued to rise.
While constantly iterating and innovating the robot body according to market demand, Bekent has always adhered to the attitude of excellence and meticulous attention to every problem that arises in the actual application of customers, not only in terms of the overall structure A number of new breakthroughs have been achieved, more than 60 national patents have been obtained in two years, and product performance has been continuously improved. The Polyhedron standard beat has been extended to 400 times/minute, and the speed has been converted into production capacity benefits and returned to customers.
As industrial production continues to move towards intelligence, we firmly believe that parallel robots will become an indispensable and important role in the development of industrial robots due to their high speed, high precision and flexibility. And Bekent will also race against time to bring more and better products to the market, and fully contribute to the arrival of China's Industry 4.0 era!