Rotary and stepping torsional-vibration composite-motion mechanism

Abstract

The invention provides a rotary and stepping torsional-vibration composite-motion mechanism, comprising an axle A, a rotary cylinder, a main axle, an oscillating bar and an axle B parallel to an axial line in the rotary cylinder. The axle A and the main axle are respectively positioned at the upper side and the lower side of the rotary cylinder and are positioned on a central axial line of the rotary cylinder at the same time; one end of the axle A is fixedly connected with a first pulley, and the other end is fixedly connected with the rotary cylinder; a second pulley and a gear A are hollowly sleeved on the axle A between the first pulley and the rotary cylinder; a gear B is engaged outside the gear A; and one end of the axle B is fixedly connected with the gear B, and the other end is fixedly connected with a double eccentric cam. The composite-motion mechanism has the advantages of simple transmission, compact structure, less quantity of components, and is easy to adjust the high speed ratio, the speed and the torsional vibration frequency with convenient adjustment of amplitude of the torsional vibration.

Description

technical field [0001] The invention belongs to the technical field of mechanism transmission, and relates to a kinematic mechanism combined with rotation and stepping torsional vibration. Background technique [0002] At present, in the field of mechanical transmission, the methods for realizing the combination of rotation and torsional vibration can be roughly divided into the following three types: [0003] (1) Single power source mechanical motion synthesis method based on eccentric sheave mechanism: This method uses a single power source to divide a rotary motion into two branches through two kinematic chains, respectively realizing the low-speed rotation required for compound motion and high-speed rotary motion, and then through a motion synthesis mechanism, these two motions are synthesized into a compound motion form of low-speed revolution and high-speed rotation, and finally through an eccentric sheave output mechanism, the compound motion is converted into low-spe...

AI Technical Summary

Problems solved by technology

[0007] (1) The principle of single power transmission is that one power source realizes the required low-speed rotation and high-speed rotation through two transmission chains, and then the two movements are synthesized, and finally the rotation and torsional vibration are realized by the eccentric sheave output mechanism The output of compound motion, this method is characterized by the combination of low-speed rotation and high-frequency torsional vibration, the disadvantage is that the transmission chain is long, the structure is complex, the volume is large, the synthesis mechanism assembly and manufacturing structure are poor, and the low-speed rotation and torsion The speed ratio between vibrating high-speed transmission chains is determined by the number of gear teeth, which is difficult to adjust

[0008] (2) The planetary motion synthesis mechanism omits two transmission chains and the synthesis mechanism, and directly synthesizes the rotation and revolution to the planetary gear through the planetary transmission, which greatly simplifies the structural complexity, but the speed ratio of low-speed rotation and high-frequency torsional vibration It is very limited, so this mechanism is less used in production

[0009] (3) The motion synthesizing mechanism based on the small tooth difference transmission adopts one power source, the mechanism is simple, but the relationship between the revolution and rotation speed of the pinion is determined by the structure, which is difficult to change; the wear between the fork pin and the fork groove is relatively small large; it is difficult to adjust the eccentric distance of the fork pin; in addition, the mechanism adopts internal gear transmission, and the manufacturing cost is high

Therefore, there are still some difficulties in practical application

[0010] It can be seen that there are still many problems in the realization of the mechanism of the existing rotary and torsional vibration compound motion, which makes it difficult to produce advanced vibration cutting processes such as vibration tapping, reaming, drilling and grinding that require this motion. be effectively promoted

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