Eccentric balance mechanism

Abstract

The invention discloses an eccentric balance mechanism which comprises an eccentric shaft provided with a counterbalance and a balance wheel device, wherein the balance wheel device is in drive jointwith the eccentric shaft. The eccentric distance D of the eccentric balance mechanism is 15-30 mm; the eccentric balance mechanism is applied to a numerical control cutting bed, converts rotation motion of a motor into pushing a piston to do reciprocal rectilinear motion, and can change the existing problem that the working capacity of equipment is poor due to small eccentric distance. The eccentric balance mechanism is provided with the eccentric shaft provided with the counterbalance and the balance wheel device; the balance wheel device is in drive joint with the eccentric shaft; the resultant force point of a first balance gravity center A and a second balance gravity center B is the gravity center C of the balance mechanism, and the gravity center C is positioned on the circle centerof an eccentric spindle, wherein the counterbalance and a connecting rod component arranged on an eccentric inertia shaft in a sleeving manner constitute the first balance gravity center A, and the balance wheel device constitutes the second balance gravity center B, so that the situation that eccentric motion generates unbalanced force under the gravity action of the connecting rod component arranged on the eccentric inertia shaft is eliminated, and necessarily caused vibration and noise due to the action of the centrifugal force during the high-speed rotation process are reduced.

Description

technical field [0001] The invention relates to the technical field of shaft parts, in particular to an eccentric balance mechanism. Background technique [0002] CNC cutting machines currently on the market use an eccentric shaft body to convert the rotational motion of the motor into a reciprocating linear motion that pushes the piston. In the prior art, the eccentric radius of the eccentric shaft body is less than or equal to 12.5mm, which makes the working ability of the whole equipment not strong. Increasing the eccentric distance can improve the cutting of the equipment, but because the shaft is an eccentric mechanism with heavy objects attached to it, when rotating at high speed Due to the action of centrifugal force, vibration and noise will inevitably be caused. The larger the eccentric distance, the more obvious the noise and vibration, which cannot meet the noise standard of CNC cutting machines in GB / T14574-2000 "Indication and Verification of Noise Emission Valu...

AI Technical Summary

Problems solved by technology

In the prior art, the eccentric radius of the eccentric shaft body is less than or equal to 12.5mm, so that the working ability of the whole equipment is not strong. Increasing the eccentric distance can improve the cutting of the equipment. Due to the action of centrifugal force, vibration and noise will inevitably be caused. The larger the eccentric distance, the more obvious the noise and vibration, which cannot meet the noise standard of CNC cutting machines in GB / T14574-2000 "Indication and Verification of Noise Emission Values ​​of Machines and Equipment".

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