A Variable Amplitude Cleaning Device Based on Planar Link Mechanism

Abstract

The invention provides an amplitude variable screening device based on a planar linkage mechanism. The amplitude variable screening device based on the planar linkage mechanism is composed of a material feeding part, a material screening part and a driving control part. A screening box of the material screening part is located below a material feeding device, one end of the screening box is connected with a triangular support through a fixed-point hanging rod, the other end of the screening box is hinged to a moving-point hanging rod, the moving-point hanging rod is connected with a control connecting rod, and the control connecting rod is connected with an output shaft of a control motor. The bottom of the screening box is hinged to a drive connecting rod, the drive connecting rod is hinged to a drive crank, and the drive crank is connected with an output shaft of a screening box drive motor. The driving control part comprises a drive motor controller and a control motor controller, the screening box drive motor is connected with the drive motor controller, and the control motor is connected with the control motor controller. According to the amplitude variable screening device based on the planar linkage mechanism, the amplitude of the front end of the screening box is changed by adjusting the hanging positions and the initial dip angles of a front-arranged hanging rod of the screening box in real time, and the situation that materials are stacked at the front end of the screening box when the feeding amount of the materials changes is avoided.

Description

technical field [0001] The invention belongs to the field of agricultural machinery, in particular to a variable amplitude cleaning device based on a plane linkage mechanism. Background technique [0002] In the traditional reciprocating screening mechanism, its classic design idea is: hang and fix the two ends of the screen surface with suspenders respectively, and use a crank linkage mechanism to connect the screen surface to drive the screen surface to reciprocate. Due to the limited swing range of the suspenders at both ends of the screen surface, when analyzing this reciprocating cleaning mechanism in practice, it can be approximately considered that the screen surface performs linear reciprocating motion with a fixed amplitude along the excitation direction. This reciprocating screening mechanism has the advantages of simple structure and reliable operation, and is especially common in cleaning and screening operations of agricultural materials. However, because it al...

AI Technical Summary

Problems solved by technology

The cleaning screen diversifies the vibration direction of the screen surface through the action of the eccentric wheel and the connecting rods with inconsistent series, but the technical scheme of the patent shows that the function of the cleaning screen is when the material is more and thicker. In order to prevent the material from colliding and scattering, the "swing range of the screen surface is relatively small", and when the material layer is thin and fully scattered, "the swing range of the screen surface is relatively large", the idea of ​​the invention is just the opposite, and the cleaning The sieve does not have the possibility of timely adjustment in the face of fluctuations in the amount of material fed

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