Gravity force balancing apparatus

Abstract

The invention introduces a gravity balancing device. A first cylinder (2) is arranged above a connecting piece (4) on a bracket (1) thereof is provided with, and a principal axis box (3) ia arranged below the connecting piece (4). The first cylinder (2) is connected with a second cylinder (21) and is matched with a first air valve (24) and a second air valve (214). A first decelerating mechanism (31) is connected between one end of the connecting piece (4) and the principal axis box (3), and a second decelerating mechanism (32) is connected between the other end of the connecting piece (4) and the principal axis box (3). The second decelerating mechanism is respectively assembled at the bracket (1) by a slide block (33) which can slide freely in a reciprocating way. The gravity balancing device has the characteristics as follows: 1) the gravity balancing device can transform the high speed vertical motion of a gravity component into the low speed motion of the connecting piece; 2) the gravity balancing device ensures that two cylinders always keep the pressure difference, so as to balance the gravity of a component with the high speed vertical motion; and 3) the gravity balancing device has good synchronous performance, simple structure and easy implement.

Description

Technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a device for performing gravity balance on parts moving up and down at high speed on a machine tool. Background technique [0002] As we all know, during machining, the parts moving up and down on the machine tool are accompanied by a certain degree of gravity. Most machine tools are driven by ball screws or linear motors. Because they have no self-locking function, when the control system loses power, the parts moving up and down will slide down due to gravity, which can easily cause accidents. Therefore, if these components are not subjected to gravity balance treatment, it will directly affect the smoothness of their movement, which in turn affects the accuracy of machine tool processing. At present, the most commonly used method of gravity balance is to use balance weights for counterweight balance, and some use hydraulic balance or pneumatic balance. How...

AI Technical Summary

Problems solved by technology

Since the connection between the above-mentioned up and down moving parts and the balance weight is a non-rigid connection, the inertial impact generated by the balance weight during operation also affects the accuracy of the machine tool, and also limits the speed and acceleration of the moving parts; However, the response speed of the hydraulic balance is low, and the high-speed moving parts cannot be balanced synchronously, and the balance accuracy is low; if the air pressure balance is used, this method can make the balanced moving parts reach a higher speed, but it still cannot maintain synchronization performance and stability, and make the overall volume of the machine tool larger

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