RU2085828C1 - Device measuring diameters and linear quantities - Google Patents

Abstract

FIELD: measurement technology. SUBSTANCE: case of device houses pulling mechanism carrying lever moving in longitudinal through groove. Case carries rest, measuring members, tips which can be rearranged to necessary kind of measurement and indicator. Rectangular groove with holes for rearrangement of one of measuring members to expand range of measurement operations is made in wall of case. EFFECT: expanded measurement range of device. 2 dwg

Description

 The invention relates to the field of measuring equipment, namely for measuring the outer and inner diameters of holes, grooves, grooves and linear quantities.

 A device of the linear bracket type is known (MG Shemetov et al. Metrological support of turning works, reference book, M. Mashinostroenie, 1989, p. 74 75, Fig. 22).

 The linear bracket has a micrometer head and an indicator with a bracket that moves along the pipe. In the required position, the brackets are fixed with screws.

The disadvantages of this device:
measuring only the outer diameter;
when reading the readings of the size of the measured part, it is necessary to take into account the readings of the indicator and the micrometer;
the use of linear brackets is only possible to control the end of the part due to structural design;
for adjustment to each measured value, a set of control rings is required, which creates inconvenience in operation and increases the time for the measurement process;
laborious to manufacture.

 The closest in technical essence to the proposed one is a device (prospectus of the company Johansson, Sweden, 1977, p. 18, mod. 8828K), containing a cylindrical body, measuring elements in the form of sponges mounted in parallel on it, one of which is mounted on an arm mounted on the housing with the ability to move it, another on the rod of the traction mechanism, the contacting elements, which are tips, mounted coaxially to each other at the ends of the jaws of the measuring elements.

The disadvantages of this device:
limited in application since allows measuring only external diameters;
for each setting, a set of control rings is required, which complicates the process of adjustment to the measured value, creates inconvenience in operation, increases the measurement time;
the range of height measurements is limited due to the constructive implementation of jaws and contacting elements, the impossibility of their rearrangement and replacement with the necessary type of measurement;
there are no elements of a discrete installation of a movable sponge, which makes it possible to expand metrological characteristics;
difficult to manufacture.

 The purpose of the invention is the expansion of applicability, simplification of tuning to a measured value and ease of operation.

 The goal is achieved in that in a device for measuring diameters and linear values, containing a cylindrical body with a traction mechanism in it in the form of a rod with a spring, connected to the indicator, measuring elements installed in parallel with each other, made in the working part in the form of jaws, of which is mounted on the traction mechanism, and the contacting elements in the form of a tip placed coaxially to each other at the ends of the jaws of the measuring elements are equipped with a lever and an emphasis, while the lever is fixed to the head with a traction mechanism and with the possibility of providing movement, it is placed in a longitudinal through groove made in the wall of the housing, and the emphasis is fixed on the outside of the housing and mounted in a longitudinal plane opposite the lever and near the through groove, another measuring element is fixed with the possibility of fixed rearrangement in a rectangular longitudinal groove made outside in the wall of the housing, and the contacting elements are removable and installed in the jaws with the possibility of their rearrangement to the desired type of measurement. In addition, the measuring elements are made interchangeable with the range of measured depths, holes and grooves.

 In FIG. 1 shows a device, section; in FIG. 2 shows a rectangular longitudinal groove made on a housing with fixing and fixing holes.

 A device for measuring diameters and linear quantities contains a cylindrical housing 1, in which a traction mechanism is placed in the form of a rod 2 with a spring 3, providing reciprocating motion. Outside, in the wall of the housing 1, a longitudinal rectangular groove 4 is made with through holes for fastening and the possibility of a fixed rearrangement of the measuring element 5, in the fastening part of which similar holes are made, and the working part is made in the form of a sponge. The measuring element 6 is fixed by means of a pin 7 on the rod 2 of the traction mechanism, the sponge of which is installed parallel to the sponge of the measuring element 5. In the working part of each measuring element, contacting elements are fixed coaxially to each other in the form of interchangeable tips 8, the location of which (outward or inward) depends on the type measured surfaces.

 The device is equipped with a lever 9, which moves in a through longitudinal groove 10, made on the outer side of the housing 1 in the longitudinal plane opposite the lever 9 and near the groove 10, mounted on the rod 2 with a pin 11, an emphasis 12. The indicator 13 is installed in the housing 1 of the device.

 To fix the axial position of the measuring element in the housing 1, a locking screw 14 is provided.

 The device operates as follows. Before starting the measurement, the indicator 13 is installed, loosening the screw 14 so that the arrow of the small scale stood at a division multiple of the measurement limit of the indicator. For example, if an indicator with a measuring range of 0-10 mm is used, then the arrow of the small scale should be at the number 10 until the moment of measurement.

 By rotating the outer ring of the indicator 13 combine 0 large scale with a large arrow of the indicator 13. The sponges of the measuring elements 5 and 6 are introduced into the hole or groove of the measured part. By simultaneously pressing on the stop 12 and the lever 9, the jaws 5 and 6 are pushed apart until the tips 8 touch the wall of the measured part, the size value is counted on the scales of indicator 13. The distance between the outer ends of the tips 8 in the initial position is H, which is constant and is indicated in the passport on the measuring device with an accuracy of 0.01 mm. Thus, the actual size of the measured part will be equal to the size H plus the indications of the scales of indicator 13.

For instance:
The value of H is 12 mm, the readings of the small scale are 7 mm, the readings of the large scale are 0.82 mm, then the hole size of the part is:
12 + 7 + 0.82 19.82 (mm).

 The range of measured sizes for this example is a value equal to the size H 12 mm plus the limit (multiplicity) of measurement of the indicator 13, equal to 10 mm

Thus, the measuring range is:
12 + 10 22 (mm),
and the part size is 19.82 mm, which indicates that the part size is within the measuring range of indicator 13.

 Measurement of the outer size is as follows.

 Indicator 13 should be set in the same way as for measuring internal dimensions. The inner surfaces of the jaws of the measuring elements 5 and 6 were in close contact with the part. Press simultaneously on the stop 12 and the lever 9, pushing the jaws 5 and 6 and release them on the measured part. By releasing the stop 12 and the lever 9, they allow the rod 2 of the traction mechanism to come into contact with the measured part under the action of the spring 10, ensuring that the part is fixed between the jaws of the measuring elements 5 and 6, and the magnitude of the measured part is counted on the scales of the indicator 13. In this case, the value of H is absent, because the measurement is made by the inner surface of the jaws of the measuring elements 5 and 6, which are pressed against each other and the distance between them is zero.

For instance:
Indications of a small scale is equal to 7 mm;
The readings of the large scale are 0.82 mm.

 The size of the part is 7 + 0.82 7.82 mm.

 The range of measured dimensions of this example is 10 mm, and the part size is 7.82 mm, which indicates that the part size is within the measurement limit of indicator 13.

 To expand the measurement limits of the device (Fig. 2), it is necessary to rearrange the measuring element 5 in a rectangular groove 4, for which the screws 15 are released, the measuring element 5 is moved by a step: B or the number of steps, then fix its position with a pin 16 in the holes 17, depending on the size of the measured part. Then the screws 15 are tightened.

 The step is the distance between the holes into which the pin enters and it is a multiple of the measurement limit of indicator 13, i.e. if the measurement limit of the indicator 13 is, for example, a value from 0-10 mm, then the step between the fixing holes is 10 mm; if the measurement limit of indicator 13 is between 0-25 mm, then the pitch is 25 mm, etc.

 The proposed device allows the use of indicators with any measurement limit, and in this case also the limit of the measured dimensions is a multiple of the measurement limit of the indicator 13.

 Contacting elements in the form of interchangeable tips 8, depending on the measurement location, can be located on the lips of measuring elements 5 and 6 both outside and inside. Tip extension length depends on the depth of the groove. This allows us to measure the diameter of the internal grooves and, the deeper the groove, the longer the tip 8 is installed in the lips of the measuring elements 5, 6. In turn, the lips of the measuring elements 5 and 6 are also removable to the range of measured depths, holes and grooves.

 Using the proposed device in comparison with the prototype allows you to expand the applicability, because it measures the internal and external diameters of holes, grooves, grooves, and linear values due to the constructive implementation of interchangeable measuring elements and the possibility of their interchange depending on the type and size of the measured part and interchangeable tips of the contacting elements. It is distinguished by simplicity of design, ease and convenience of adjustment, measurement accuracy, equal to the accuracy of the indicator used. In the proposed device, you can apply various types of indicators with a corresponding change in the node of its clamp. The proposed device does not require large material costs for its manufacture. This device can be widely used in various industries.

Claims (1)

 A device for measuring diameters and linear quantities, comprising a cylindrical body with a traction mechanism in it in the form of a rod with a spring connected to an indicator, measuring elements installed in parallel with respect to each other, made in the form of jaws in the working part, one of which is mounted on the traction mechanism and contacting elements in the form of tips placed coaxially to each other at the ends of the jaws of the measuring elements, characterized in that it is provided with a lever and a stop, while the lever is fixed to the head the traction mechanism and is placed with the possibility of moving in a longitudinal through groove made in the wall of the housing, and the emphasis is fixed on the outside of the housing and mounted in a longitudinal plane opposite the lever near the through groove, another material element is fixed with the possibility of fixed permutation in a rectangular longitudinal groove made on the wall of the housing, and the contacting elements are removable and installed in the jaws with the possibility of their rearrangement to the desired type of measurement.

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