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Length sensor

A technology of length measurement and measuring head, which can be used in measuring devices, mechanical measuring devices, measuring gauges, etc., and can solve problems such as lateral bending and measuring head friction.

Inactive Publication Date: 2005-11-30
DR JOHANNES HEIDENHAIN GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The helical spring is placed in a hole in the measuring head, which limits a relatively thick measuring head
For the required large strokes of the measuring head and the application of long helical springs, there is also the problem of lateral bending here, which causes friction between the helical spring and the measuring head

Method used

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Examples

Experimental program
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Embodiment Construction

[0016] according to figure 1 and figure 2 The following describes an embodiment of a length measuring device designed according to the present invention. The figures schematically show a cross-sectional view of the entire length measuring device, which includes a base body 1 in which a rod-shaped measuring head 2 is supported, which is slidable in the measuring direction X.

[0017] measure a for contact figure 2 For the workpiece 5 shown, the end of the measuring head 2 is designed as a ball contact 6 . During an abutment process, the measuring head 2 is pressed with a force F by the abutment element 6 on the surface of the workpiece 5 to be measured. This force F is generated by helical springs 7 and 8 , which are arranged one behind the other in the measuring direction X and press the abutment element 6 against the workpiece 5 . In order to make the structure compact, the coils of the coil springs 7 and 8 extend around the circumference of the circular measuring head ...

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PUM

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Abstract

The probe has a probe pin (2) with a probe element (6) for scanning an object (5) by moving relative to a base body (1) against a spring force. The probe pin is biased in the measuring direction (X) by several spring elements (7,8). A guide element (4) is provided between each two spring elements. The guide element is displaceably mounted on the probe pin and on the base body.

Description

technical field [0001] The present invention relates to a length measuring device. Background technique [0002] This length measuring device is used to measure workpieces in manufacturing technology. For example, thickness, width, depth, length, and inner or outer diameter can be determined. [0003] US Pat. No. 5,072,174 describes a length-measuring device in which a measuring head is mounted slidably in the longitudinal direction in a base body by means of a guide in the form of a ball guide. The contact pressure required to touch the workpiece to be measured is generated by a coil spring, one end of which is fixed on the measuring head and the other end on the base. [0004] The length of the coil spring must be at least equal to the travel of the measuring head, but long coil springs have a tendency to bend sideways. The greater the desired stroke of the measuring head, the longer the ball guide must also be designed in order to be able to absorb the lateral forces t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B5/02G01B3/00G01B3/22G01B11/00G01B21/00
CPCG01B3/002G01B3/22G01B3/008G01B11/00
Inventor P·赫尔克特L·贝格
Owner DR JOHANNES HEIDENHAIN GMBH
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