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Linear Motion Units with Lifetime Monitoring

A linear motion and linear technology, applied in the direction of measuring devices, electrical devices, mechanical measuring devices, etc., can solve problems such as drift drama

Active Publication Date: 2021-10-08
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, however, it should be taken into account that, with long-term, static loads, the signals of the strain gauges are subject to significant drift, which is exacerbated by temperature influences

Method used

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  • Linear Motion Units with Lifetime Monitoring
  • Linear Motion Units with Lifetime Monitoring
  • Linear Motion Units with Lifetime Monitoring

Examples

Experimental program
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Embodiment Construction

[0050] figure 1 A roughly schematic cross-section through a prestressed linear rolling guide 20 according to the first embodiment is shown. The linear rolling guide 20 has a guide rail 21 extending with a constant cross-sectional shape along a longitudinal axis 11 perpendicular to figure 1 The drawing plane orientation of . The guide rail 21 is preferably made of steel and is hardened in the region of the track for the rolling elements 22 . Currently, the rolling bodies 22 are designed as balls made of hardened steel, wherein cylindrical or barrel-shaped rolling bodies are also conceivable. Viewed in cross section, the guide carriage 30 is U-shaped. It has a fastening portion 32 from which two legs 31 project at right angles. fastening part 32 with workbench (in figure 2The label 12) is fixedly connected. The leg 31 surrounds the guide rail 21 , wherein the rolling bodies are arranged between the guide rail 21 and the leg 31 . Presently, two rows of bearing rolling bod...

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PUM

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Abstract

The invention relates to a linear motion device with a table and a base, wherein the table is movably guided in the direction of the longitudinal axis by at least one linear rolling guide at the base, wherein each linear rolling guide It comprises a guide rail fastened to the base and at least one guide carriage fastened to the worktable, wherein each guide carriage surrounds the respectively associated guide rail with two legs in a U-shape. According to the invention, at least one displacement sensor is provided with which a deformation of at least one associated leg of the guide vehicle can be measured, the deformation being transverse to the longitudinal axis, wherein the at least one displacement sensor can be fastened on or Attached to the table or to the base, wherein an evaluation device is provided, which is configured in such a way that, using at least one displacement sensor, a change in the pretension of at least one respectively assigned guide carriage can be determined.

Description

technical field [0001] The invention relates to a linear motion device. Background technique [0002] A linear rolling guide is known from EP 1719 992 B1, which is provided for use in a linear motion device. The guide carriage is provided with strain gauges, by means of which the deformation of the strain gauges due to external loads is firstly to be measured. It is also known that the pretension of the guide carriage decreases due to wear, wherein the resulting deformations can also be measured using strain gauges. However, it should be taken into consideration here that, with long-term, static loads, the signals of the strain gauges are subject to significant drift, which is exacerbated by temperature influences. Contents of the invention [0003] The advantage of the invention is that the occurrence of wear on the linear rolling guide and thus the approaching end of service life can be reliably detected. The corresponding measurements are not affected by drift phenom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C29/04G01B7/02G01B7/24
CPCF16C29/04G01B7/02G01B7/24B23Q1/58B23Q17/008F16C19/522F16C29/0638F16C29/0645F16C29/12F16C2233/00G01B5/0004G01B5/0009G01B5/0014G01B7/023G01B7/16
Inventor H.罗斯托伊舍M.伦佩尔
Owner ROBERT BOSCH GMBH
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