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Actuator

A technology of actuators and moving parts, which is applied in the direction of electric components, AC motor control, electrical components, etc., and can solve the problems of workpiece damage and inability to absorb workpieces, etc.

Active Publication Date: 2021-05-28
THK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, when the workpiece is attracted to the shaft, if there is a gap between the workpiece and the shaft, the workpiece may collide violently with the shaft and the workpiece may be damaged, or the workpiece may not be adsorbed.
On the other hand, when the force pressing the workpiece is too large, the workpiece may be damaged

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0037] figure 1 It is an external view of the actuator 1 according to this embodiment. The actuator 1 has a housing 2 having an approximately rectangular parallelepiped shape, and a cover 200 is attached to the housing 2 . figure 2 It is a schematic configuration diagram showing the internal structure of the actuator 1 according to the present embodiment. Part of the shaft 10 is accommodated inside the housing 2 . The front end portion 10A side of the shaft 10 is formed hollow. The material of the shaft 10 and the housing 2 can be, for example, metal (for example, aluminum), but resin or the like can also be used. In addition, in the following description, an XYZ rectangular coordinate system is set, and the position of each member is demonstrated referring this XYZ rectangular coordinate system. Let the long side direction of the largest surface of the housing 2, that is, the direction of the central axis 100 of the shaft 10 be the Z-axis direction, and the short side di...

no. 2 approach

[0082] In the first embodiment, the influence of the phase delay is reduced by disabling the function of the low-pass filter 72 . On the other hand, in this embodiment, the phase delay is reduced by changing the cutoff frequency of the low-pass filter 72 . That is, in the present embodiment, when the workpiece W is picked up, after the shaft 10 comes into contact with the workpiece W, the cutoff frequency of the low-pass filter 72 is lowered than before the contact. In addition, in the present embodiment, when the workpiece is set, the cutoff frequency of the low-pass filter 72 is lowered after the workpiece W comes into contact with other members than before it comes into contact with other members. Here, by lowering the cutoff frequency, the phase delay becomes larger, and on the other hand, the influence of noise is reduced. Therefore, after the shaft 10 comes into contact with the workpiece W, by lowering the cutoff frequency of the low-pass filter 72 than before the cont...

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PUM

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Abstract

In this actuator, a shaft and a workpiece are prevented from taking more than the necessary load. This actuator is provided with a force sensor which gives an output corresponding to the force applied to a connection member connected to the shaft, an amplifier which amplifies output of the force sensor, and a low pass filter. Until the shaft or a member that follows the shaft contacts another member, the load applied to the shaft is detected on the basis of output from the amplifier, and thereafter, the load on the shaft is detected on the basis of output from the low-pass filter.

Description

technical field [0001] The present invention relates to actuators. Background technique [0002] By making the interior of the shaft a negative pressure in a state where the hollow shaft is pressed against the workpiece, the workpiece can be attracted to the shaft to pick up the workpiece. Here, when the workpiece is adsorbed to the shaft, if there is a gap between the workpiece and the shaft, the workpiece may collide violently with the shaft and the workpiece may be damaged, or the workpiece may not be adsorbed. On the other hand, when the force pressing the workpiece is too large, the workpiece may be damaged. Therefore, it is desirable to press the shaft against the workpiece with an appropriate load. Also, if the speed of the shaft is high when the shaft is in contact with the workpiece, the workpiece may be damaged due to the impact when the shaft collides with the workpiece, so it is desirable to alleviate the impact. Conventionally, an adsorption member is provide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K41/03B25J19/00
CPCH02P25/06H02K41/031H05K13/0409B25J15/06H02K41/03
Inventor 福岛克也石井正志丹羽弘树铃木明大贺和人和久田翔悟原聪史水野智史林茂树
Owner THK CO LTD