Parallel device based on Delta mechanism and 3D printer adopting same

Abstract

The invention provides a parallel device based on a Delta mechanism and a 3D printer adopting the same. The parallel device based on the Delta mechanism comprises a first-grade motion mechanism, a second-grade motion mechanism, a bearing main platform, a support platform and a terminal actuation platform. The 3D printer comprises a monitoring module, a control module and a feeding module. The feeding module is mounted in the middle position of the lower side of the bearing main platform; the monitoring module is connected with the control module; and the control module is respectively connected with the first-grade motion mechanism and the second-grade motion mechanism. The parallel device based on the Delta mechanism and the 3D printer adopting the same have the following beneficial effects: besides of overcoming the defects in the prior art, when the working space of the 3D printer is enlarged, the complex degree of the printer mechanical structure is reduced; and the 3D printer based on the Delta parallel mechanism is simple in structure, and is higher in precision and efficiency.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a parallel device based on a Delta mechanism and a 3D printer using the same. Background technique [0002] At present, most 3D printers adopt a series open chain structure. The end effector of this structure is supported by a driving rod. The error on the end effector is the cumulative error of each joint, so the accuracy is relatively low and the practicability is limited. Since the traditional series mechanism has the defects of weak load capacity, low transmission efficiency, and low precision of the end effector, scholars and experts have gradually proposed the concept of parallel mechanism since the late 20th century. Compared with the series mechanism, the parallel mechanism has higher bearing capacity, higher rigidity, and more stable performance; the parallel mechanism does not accumulate and magnify the errors of the series mechanism, and the errors of e...

AI Technical Summary

Problems solved by technology

For example, the three translation degrees of freedom parallel mechanism is the Delta mechanism. Although the parallel mechanism is better than the series mechanism to a large extent, it is limited by the input space, the shape and size of the platform and the base, and the space between the platform and the base and its rods. Constraints such as mutual interference and singular positions lead to a relatively small working space

[0003] In order to solve the shortcomings of the small working space of 3D printers with parallel structure, someone designed a method of combining two kinds of kinematic chains to increase the working space

The patent with application number 201410371262.9 and titled "A Delta Structure Parallel Manipulator Capable of Precise Three-Dimensional Movement" proposed a method of combining the structure based on the 3-PUU kinematic chain with the Delta parallel mechanism, which enlarged the mechanism to a certain extent. working space, but the design of the invention in the Delta parallel mechanism is relatively complicated. The transmission module uses a transmission four-bar mechanism, which increases the design difficulty of the control system, and later maintenance becomes troublesome; The slider-double guide rail structure needs to continue to design the drive module, which is not designed in this invention, which greatly increases the workload

[0004] In the patent with the application number 201410801070.7 and the name "A 3D Printer Based on Delta Parallel Mechanical Structure", the movement of the pulley is controlled by the movement of the belt. The belt transmission is a flexible transmission component with certain creep properties. The efficiency is low, the life of the belt is short, and elastic sliding cannot be avoided during operation, and the accurate transmission ratio cannot be guaranteed, and the belt transmission is prone to slipping. When slipping, it will not work normally and cause the transmission to fail.

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