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Applied friction driving device and flexible hinge apparatus for precision movement working platform

A precision motion and worktable technology, applied in installation, instrumentation, metal processing, etc., can solve the speed limit of precision motion system, increase the weight, cost, size and complexity of precision motion system, etc.

Inactive Publication Date: 2003-11-05
PANASONIC HEALTHCARE HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, backup rolls add weight, cost, size and complexity to the precision motion system
Precision motion systems are also speed limited in order to maintain a consistent preload force on the friction drive

Method used

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  • Applied friction driving device and flexible hinge apparatus for precision movement working platform
  • Applied friction driving device and flexible hinge apparatus for precision movement working platform
  • Applied friction driving device and flexible hinge apparatus for precision movement working platform

Examples

Experimental program
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Embodiment Construction

[0016] Referring now to the drawings, wherein like reference numerals refer to like elements throughout the several views, FIG. 1 shows a friction drive system according to the prior art. The electric motor 30 serves to rotate the drive shaft 10 in the direction of rotation 14 . The follower 20 has a friction surface 22 , a part of which is in contact with the contact area 11 of the shaft 10 . The backup roller 40 exerts a preload force 46 on the follower 20 , thereby pressing the friction surface 22 against the shaft 10 . The drive shaft 10 is defined in a fixed position relative to the follower 20 , eg by bearings (not shown). Thus, the drive shaft 10 acts as a transmission member, which generates friction or thrust 26 by rotation of the drive shaft 10 pressed against the friction surface 22 . The thrust 26 acts on the friction surface 22 of the follower 20 to push the follower 20 to move. The thrust force 26 is proportional to the preload force 46 and the movement of the...

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PUM

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Abstract

A friction drive is disclosed comprising a rotationally moving drive shaft which is in frictional contact with a driven member in a contact region. The drive shaft transmits thrust in the contact area. The follower is adapted to receive the thrust and provide motion in response to the thrust. A flexible hinge connects the drive shaft to the follower with constant force while limiting movement of the contact area in the thrust direction.

Description

technical field [0001] The present invention relates generally to precision motion systems and, more particularly, to a method and apparatus using friction drives with flexible hinges to provide low cost, high speed and compact nanoscale resolution Precision Motion Workbench. Background technique [0002] Precision motion systems with sub-10nm accuracy are required in many manufacturing applications including assembly and alignment of light transmission and processing equipment. Typically, precision motion is provided by a combination of DC or AC servo motors, high precision feedback encoders, high precision linear bearings or guide blocks. However, 6-axis motion consoles incorporating these subsystems are very expensive. These subsystems are also complex and have high part counts, which can cause reliability issues. Another issue with these systems is that they often require reduction devices, such as gear sets or lead screws, to provide sufficient torque for many precis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B21/26G02B7/02H02N2/00H10N30/20
CPCG02B7/023H02N2/123H02N2/126
Inventor 大原彻雄
Owner PANASONIC HEALTHCARE HLDG CO LTD