Crank block type mechanism arm

Abstract

The invention discloses a mechanism arm, in particular to a crank block type mechanism arm of a robot for transmitting workpieces among vacuum chambers of vacuum filming equipment. The structure is as follows: a supporting plate is arranged on a hollow shaft; a roll ball track is arranged on the end part of the supporting plate; a vertical shaft positioned on the lower part of a dead center extracting device is matched with a circular hole of the supporting plate in a sliding way, a slide block, an arm lever seat and an arm lever which can slide on the roll ball track are connected together, a connecting bar is connected with the arm lever, one end of a pendulum bar is fixedly connected with a main shaft, the other end of the pendulum bar is articulated with the connecting bar, the connecting bar is provided with a concave-shaped guiding groove which is matched with a shifting pin positioned on the dead center extracting device, and the front end of the arm lever is provided with a mechanical hand. The invention has the advantages of simple structure, little using materials, small occupying motion space, convenient processing and manufacture, stable property, high reliability, maintenance free and high practicability, can obviously reduce the manufacturing and using cost of the equipment and can also be applied to other fields except the vacuum filming equipment.

Description

Technical field [0001] The invention relates to a mechanical arm, in particular to a crank slider type mechanical arm of a robot that completes transfer of workpieces between vacuum suffocations of vacuum coating equipment. Background technique [0002] The robot arm of the robot that completes the transfer of the workpiece between the vacuum suffocation of the vacuum coating equipment has many structural methods. The mechanical arm with cylinder or hydraulic cylinder drive can seriously damage the vacuum environment due to its inevitable micro leakage, so it cannot be used in vacuum asphyxiation. There are also mechanical arms driven by gears and racks. Because they wear quickly under high vacuum without lubrication, and because the machining accuracy must be high, they are not economical. Therefore, such mechanical arms are rarely used. At present, a kind of mechanical arm composed of gears and connecting rods is used more frequently. Its performance is better, but it requires...

AI Technical Summary

Problems solved by technology

First: the connecting rod 5 must be twice the length of the swing rod, and at the same time, the bracket plate is also doubled accordingly, which increases the amount of materials and processing costs

Second: Since the radius of gyration of the support plate is doubled, the too large one occupies the limited space of the vacuum block, which makes it difficult to install other functional components. Sometimes the diameter of the vacuum block has to be increased and a larger vacuum pump

This will increase the equipment cost accordingly

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