Balancer mechanism for rotating shaft

Abstract

A balancer mechanism (8) for a rotating shaft capable of easily and surely reducing a torque acting on the rotating shaft by allowing a balancing torque offsetting at least a part of the torque acting on the rotating shaft to act on the rotating shaft by using a gas spring, comprising the gas spring (20), a first connection part (40) for rotatably connecting the lower end part of the gas spring (20) to a shaft supporting mechanism (5) side stationary member (10) and a second connection part (45) for rotatably connecting the upper end part of the gas spring (20) to a rotating member (15) fixed to the left end part of the rotating shaft (3) at a position eccentric to the axis (A) of the rotating shaft (3).

Description

technical field [0001] The present invention relates to a balancer mechanism for reducing the rotational torque of a member supported on a rotating shaft rotatably supported on a shaft supporting portion, and the member is supported by the rotating shaft. Background technique [0002] Conventionally, in an indexer (Japanese: Japanese: INDEXA) device, a crank press device, an automatic robot arm, and the like, the rotating shaft is rotatably supported on a shaft support portion, and the table unit is supported on the rotating shaft. Components such as the moving plate and the arm. [0003] For example, in an indexer device, a pair of rotating shafts fixed to a table unit are rotatably supported by a shaft support portion, and a driving force is input to the rotating shafts from a motor to rotationally drive the table unit. [0004] On the workbench unit, there is provided a turntable that can rotate around an axis perpendicular to the axis of the rotation shaft and its drive...

AI Technical Summary

Problems solved by technology

[0010] However, in this rotary table, it is necessary to form a pneumatic hole at the end of the rotary shaft, form the first and second pressure receiving surfaces on the wall surface of the hole, install an air supply member, insert the air supply member into the pneumatic hole, and There must also be an air channel and a pressurized air supply device, so the structure is complex and the production cost is high

In addition, in order to cope with the rotational torque that changes according to the rotational angle of the rotational shaft, although an air valve and a control device are provided to adjust the pressure of the pressurized air supplied to the pneumatic hole, it is also possible to adjust the rotational torque for balance, but further make the structure Complicated and costly

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