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Gauge for checking radial dimensions of mechanical pieces

Through the combination of air ducts and internal sealing rings, the problem of insufficient sealing and performance of existing gauges in small-size inspections is solved, and a compact gauge design is achieved, which is suitable for accurate inspection of small crank pins and other mechanical parts.

Active Publication Date: 2009-03-11
MARPOSS SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a gauge with a small overall size, while ensuring excellent performance when detecting the radial dimension of a mechanical workpiece, thus overcoming the problem of limited margins of existing gauges relative to the measured parts in applications question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The figure shows a gauge 1 according to the invention for detecting the radial dimensions of a mechanical workpiece, more specifically a so-called "caliper gauge". Said gauge 1 comprises a support system having a housing 2 of long and narrow shape, and a V-shaped reference 4 which is adjustably connected to the end of the housing 2, for example by means of a screw, which is shown in FIG. 1 Indicated by reference numeral 3 . The V-shaped reference object 4 includes a pair of contact surfaces formed at an angle for resting on the surface of the workpiece to be measured. The housing 2 has a through axial hole 6 in which the rod 8 is arranged and can be guided in longitudinal translation by guide means with a first bushing 12 and a second bushing 14 . The end 10 of the rod 8 has a reduced diameter and protrudes from the housing 2 at the end of the axial hole 6 corresponding to the V-shaped reference 4 . Towards the opposite end, the axial bore 6 delimits an enlarged area ...

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PUM

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Abstract

A gauge (1) for checking radial dimensions of a workpiece (60), e.g. the diameter of a crankpin orbitally rotating during grinding operations, includes a casing, a V-shaped reference device (4) and a rod that can move within the casing (2) with respect to the reference device, an end of the rod projecting from the casing and carrying a feeler (20) for touching the surface of the workpiece to be checked and transmitting the movements of the feeler to a transducer (22). A sealing system for preventing coolant, dust or other foreign matter from getting inside the casing includes a pneumatic conduit (6) for allowing compressed air to be blown from inside the casing to outside, and an internal seal that - in the non-operative condition - seals the opening through which the rod projects from the casing. According to an advantageous embodiment, the seal is fastened into a bushing guiding the rod and cooperates with a surface of the rod in order to get the tightness.

Description

technical field [0001] The invention relates to a gauge for detecting the radial dimension of a workpiece characterized by a cylindrical surface, the gauge comprising a housing, a V-shaped reference, a feeler, a transmission element, a sensor, and a sealing system, wherein the The V-shaped reference object is connected to the housing for matching with the cylindrical surface of the workpiece; the feeler gauge is used for contacting the cylindrical surface of the workpiece and performing linear displacement; the transmission element is movably arranged in the housing and supported the feeler gauge; the sensor for providing a signal indicative of the position of the feeler gauge relative to the V-shaped reference, the sensor comprising a movable element connected to the transmission element; the sealing system located in the transmission between the element and the case. Background technique [0002] Gauges having the above characteristics are well known in the art. An examp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B5/42B24B49/04
CPCB24B49/045B24B5/42B24B49/04
Owner MARPOSS SPA
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