SU1416854A1 - Measuring head - Google Patents

Abstract

The invention relates to technical measurements in mechanical engineering and can be used on coordinate measuring machines. The aim of the invention is to improve the measurement accuracy by installing electrical contacts on the long arms of unequal-arm contact levers II mounted on the body 1 of the head and contacting the fungus 7 with their short arms 12. The electrical contacts 13 on the levers 11 interact with the corresponding electrical contacts in the form of segments located on a glass fixed on the fungus 7. The fungus 7 is mounted on one end of the measuring rod 5, at the second end of which there is a measuring tip 6, which interacts with the measured object measured emym. The measuring rod 5 of the fungus 7 is moved and the contact lever 11 is rotated. In this case, the electrical contacts are broken and an electrical signal is generated which is processed by the logic element. 1 h. n. f-ly, 3 ill.

Description

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 The invention relates to technical measurements in mechanical engineering and can be used to measure objects of complex shape on coordinate measuring machines.

The purpose of the invention is to improve the measurement accuracy.

FIG. 1 shows a measuring head, a section; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. one.

The measuring head comprises a hollow body 1 with a supporting flange 2 at one end and a cover 3 with a cylindrical protrusion 4 at the other end, a measuring rod 5 with a measuring tip 6 at one end and with a fungus 7 at the other end. A mold 8 with insulated electrical contacts in the form of segments 9 is fixed on the fungus 7. On the housing 1, unequal arm contact levers 11 are installed with the possibility of rotation around the axes 10, which contact their short shoulders 12 with the fungus 7 and electrical contacts 13 that carry the ends of the long shoulders and interact with corresponding electrical contacts 9. The spring 14 with adjustable force provides clamping of the fungus 7 to the support flange 2 through ball bearings 15.

Two contact levers 11 are connected via terminals D and D to the logic element of electric signal processing, while the remaining contact levers are connected to each other by pairwise flexible conductors 16. Holes with a diameter equal to 2/3 of the ball diameter are drilled in the fungus 7 and the supporting flange 2. supports 15, fixed in the support flange 2 with glue.

The measuring head works as follows.

Using the cover 3, the measuring head is fixed to the quillies of the coordinate measuring machine and the head is brought to the object to be measured before touching it.

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the measuring tip 6. After touching, the measuring rod 5 and the fungus 7 are spatially displaced. At the same time, the short arm 12, on which the fungus acts, rotates the contact lever 11 around the axis 10. The contacts 13 with the contacts 9 open and the logic element operates electrical signal. When the radial movement of the measuring tip 6 occurs the simultaneous movement of the electrical contacts 13 and 9 in the opposite direction relative to one another. The movement of the measuring tip 6 in the radial direction is limited by the protrusion 4 of the cover 3.

Claims (2)

Invention Formula . A measuring head comprising a hollow body with a support flange at one end and a lid at the other end, mounted with the possibility of spatially moving the measuring rod with a measuring tip at one end and with a fungus at the other end and a spring with adjustable force for pressing the fungus to the support flange, characterized in that, in order to improve the accuracy of measurement, it is equipped with a cup fixed on the fungus and mounted on the body with the possibility of rotation by unequal shoulder contact arms, tiruyuschimi their short arms with the fungus and bearing on the ends of the long arms of electrical contacts which interact with corresponding electrical contacts which are mounted on the glass. 2. The measuring head according to claim 1, characterized in that in order to limit the movement of the measuring tip on the lid there is a cylindrical protrusion located concentrically to the inner surface of the glass with a radial clearance. (pas. 2 VNIIPIZakaz 4058/40 Circulation 680 Subscription Production and printing company, Uzhgorod, st. Design. four fig.Z