Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C29/00—Bearings for parts moving only linearly
  • F16C29/005—Guide rails or tracks for a linear bearing, i.e. adapted for movement of a carriage or bearing body there along
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
  • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
  • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
  • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
  • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
  • G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
  • G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation

Definitions

• the invention relates to an arrangement for fastening a length measuring device and can be used, for example, for combined positioning and measuring devices in machine tool construction and in general machine construction.
• positioning and measuring devices are known from the prior art, which enable a length measuring device to be attached to a machine tool.
• the positioning and measuring devices represent completely independent units that are also manufactured independently of one another (DE-C-27 12 421).
• the guide of a base frame and the associated slide are usually mounted independently of one another and aligned separately from one another.
• special prerequisites and conditions must be met in order to bring the positioning device and the measurement system into the operative context.
• specially machined mounting surfaces must be created on the machine both on the basic bed and on the slide, and special adjustment means are required to align the measuring system with the slide run. The installation of the measuring system on the machine is very time consuming.
• Another type of measuring system is known from WO 90/02919.
• a self-adhesive steel tape rule is aligned with the applicator to guide the slide and glued onto the machine bed or a base body.
• This type of measuring system solution is also very complex to assemble and the basic measuring system accuracy that can be achieved is relatively poor, since the inherent stability of the measuring tape is relatively low, and the slightest mechanical stresses or voltage differences, which are unavoidable during the gluing process, lead to a deterioration in the scale.
• the object of the invention is to provide an arrangement for fastening a length measuring device, with which simple and time-saving installation of the measuring system, for example on a linear guide unit, is achieved.
• the measuring process should not be negatively influenced.
• a scale is positively, detachably and directly coupled to the guide rail directly or via a scale carrier connected to it.
• the scale or the scale support with its longitudinal edges can be inserted into corresponding recesses made on the guide rail.
• the recesses and the shaped rail are formed from one piece.
• the recesses are designed as grooves or folds.
• the recesses are advantageously formed continuously.
• the recesses are designed as blocks.
• the scale is designed as a flexible metal strip and can be aligned and stabilized with respect to the guide rail via the positive connection.
• the scale is fixed at one point in a form-fitting and detachable manner to the guide rail in the longitudinal direction.
• the arrangement can be designed in such a way that the scale is fixed at one end to the guide rail.
• the user is provided with a combination of positioning unit and measuring system as a unit, with which a simple, time-saving and thus cost-effective mounting of the measuring system on machine tools is achieved.
• the user only has to provide mounting surfaces for the positioning system, since the measuring system installed is already aligned with the management unit.
• the measuring system is interchangeable as an independent unit, independent of the positioning unit. Thus, in the event of service, both the positioning unit and the measuring system can be replaced independently of one another and can therefore also be repaired independently.
• Fig. 1 a schematic diagram of the invention
• a longitudinally movable guide carriage 2 is arranged in a guide rail 1.
• the guide carriage 2 is firmly connected to a measuring head 3, but detachably, for example via a screw connection.
• a scale 4 is received by an elongated scale carrier body 5.
• the scale 4 is advantageously connected to the scale support body 5 via an elastic adhesive.
• other types of fastening which are generally known to the experts, are also possible.
• the measuring head 3 is connected to an evaluation unit, not shown, by means of connecting elements generally used in electrical engineering, by means of which the guide carriage is controlled and the measuring signals are evaluated.
• the scale support body 5 is designed so that it in the longitudinal extension has two contact surfaces 6, 7, for example in the form of folds. In the longitudinal direction there are recesses 8, 9 which are dimensioned in such a way that a form-fitting reception of the scale carrier body, as is customary in precision mechanics, can take place.
• the recesses 8, 9 can be made in one piece with the guide rail 1, the recesses 8, 9 as a groove or fold can be continuous or interrupted as blocks on the guide rail 1 with fastening methods generally used in measurement technology, for example by means of an adhesive connection.
• the recesses 8, 9 are designed in the longitudinal direction in such a way that after insertion of the scale support body 5, the measuring system, which consists of the measuring head 3, the scale 4 and the scale support body 5, is adjusted for a measurement.
• the scale support body 5 is firmly connected to the guide rail 1 via a fastening element 10, for example a screw.
• the stop elements 11, 12 and 13 are dimensioned in such a way that the measuring head 3, when attached to the guide carriage 2, only rests against the stops in order to ensure the assignment of the measuring head 3 to the scale 4 without further adjustments.
• the contact surfaces 6, 7 and the recesses 8, 9 are made continuously in the longitudinal direction.
• the division of the scale 14 is on the scale support body 5 according to FIG. 1 or the body of the scale 14 is so stiff that it has a positive fit in the longitudinal direction, as described in FIG Recesses 8, 9 can slide.
• the contact surfaces 15, 16 of the scale 14 take over the function of the contact surfaces 6, 7, the scale support body 5, as described in Fig. 1.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Length Measuring Devices With Unspecified Measuring Means (AREA)
• Transmission And Conversion Of Sensor Element Output (AREA)
• Length Measuring Devices By Optical Means (AREA)
• Optical Transform (AREA)
• A Measuring Device Byusing Mechanical Method (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7767346

Family Applications (1)

Country Status (5)

Cited By (3)

Families Citing this family (29)

Citations (2)

Family Cites Families (13)

• 1995
  • 1995-07-20 DE DE19526517A patent/DE19526517C2/de not_active Expired - Fee Related
• 1996
  • 1996-07-15 EP EP96926350A patent/EP0782696A1/de not_active Withdrawn
  • 1996-07-15 US US08/809,033 patent/US5987768A/en not_active Expired - Fee Related
  • 1996-07-15 WO PCT/EP1996/003094 patent/WO1997004286A1/de not_active Ceased
  • 1996-07-15 JP JP50627597A patent/JP4073480B2/ja not_active Expired - Fee Related

Patent Citations (2)

Non-Patent Citations (1)

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