Movement guiding device, table device, and damping method for movement guiding device

A guide device and workbench technology, applied in the direction of linear motion bearings, bearings, shafts and bearings, etc., to achieve the effects of low load, improved oil retention characteristics, and small braking force

Inactive Publication Date: 2007-12-05
THK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conversely, the disadvantage is that since the sliding guide does not generate damping force such as frictional resistance, once vibration occurs, it is difficult to dampen it

Method used

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  • Movement guiding device, table device, and damping method for movement guiding device
  • Movement guiding device, table device, and damping method for movement guiding device
  • Movement guiding device, table device, and damping method for movement guiding device

Examples

Experimental program
Comparison scheme
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Embodiment

[0111] Mathematical formula 1 below shows the formula for calculating the viscous resistance of oil. FIG. 22 is a schematic diagram showing parameters used in this calculation formula.

[0112] [number 1]

[0113] γ(1 / s)=V(m / s) / h(m)

[0114] τ(Pa)=F(N) / A(m 2 )

[0115] η(Pa·s)=τ(Pa) / γ(1 / s)

[0116] ε(mm 2 / s)=η(Pa·s) / 10 3 / ρ(g / cm 3 )

[0117] thus

[0118] F(N)=η(Pa·s)·A(m 2 )·V(m / s) / h(m)

[0119] =ε(mm 2 / s)·ρ(g / cm3)·A(m 2 )·V(m / s)·10 3 / h(m)

[0120] γ: cutting speed

[0121] V: speed

[0122] h: height

[0123] τ: shear stress

[0124] F: Viscous resistance

[0125] A: contact area

[0126] η: Viscosity

[0127] ε: dynamic viscosity

[0128] ρ: density

[0129] One parameter of the viscous resistance F is the velocity V. The faster the moving part 2 moves, the greater the viscous resistance F. The height h is the height of the oil layer, that is, the size of the gap 16 between the end damping part 5 and the track guide rail 1 . The narrower the...

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Abstract

A movement guiding device having a damping structure different from a conventional damping structure, a table device, and a damping method for the movement guiding device. The movement guiding device comprises a rail member (1) having a rolling element rolling part (1a), a movement member (2) having a loaded rolling element rolling part (2a) facing the rolling element rolling part (1a) and capable of performing a linear or curve movement relative to the rail member (1), and a plurality of rolling elements (3) interposed between the rolling element rolling part (1a) of the rail member (1) and the rolling element rolling part (2a) of the movement member (2). The layer of an oil in contact with the rail member (1) and the movement member (2) is filled in a clearance (16) between the rail member (1) and the movement member (2). A braking force in proportion to a speed is provided to the movement member (2) or the rail member (1) by utilizing the viscosity resistance of the oil.

Description

technical field [0001] The present invention relates to a motion guiding device such as a linear guide rail, a ball spline, a ball screw, etc., in which rolling bodies such as balls and rollers are interposed between rail components and moving components. Background technique [0002] Conventionally, for workbenches that move linearly on a machine frame, the following rolling guide type motion guides are generally used, in which rolling elements such as balls or rollers are interposed in the guiding part of the moving object that performs linear motion, and by means of The rolling motion of the rolling elements realizes the guiding function. The motion guide device of the rolling guide type is composed of a track rail that forms a moving track of the moving body, a moving block that moves relatively to the track rail, and a rolling element interposed between the track rail and the moving block. [0003] The advantage of rolling guides compared to slide guides is that there ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C29/06
Inventor 道冈英一芳野雅彦本间光明永井知
Owner THK CO LTD
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