CN214951051U - Inner hole measuring device - Google Patents

Abstract

The utility model discloses an inner hole measuring device, which comprises two measuring arms and an angle display part, wherein one end of each measuring arm is hinged, and the other end of each measuring arm freely rotates; the angle display piece sets up the articulated position of two measuring arms for show the angle of opening of two measuring arms, through the rotation between two articulated measuring arms, turn into the record of angle with the diameter size of the hole of awaiting measuring, through the angle that the hole corresponds should be measured in angle display piece record, after the measurement, take out this interior accuse measuring device, measure the hole diameter that this angle corresponds, simple structure easily operates, measuring range is big, do not receive the influence of hole position, therefore, the commonality is strong, can measure the hole of arbitrary shape, measurement accuracy is higher.

Description

Inner hole measuring device

Technical Field

The utility model belongs to the technical field of measure the utensil, specifically speaking relates to a hole measuring device.

Background

At present, in practical engineering applications, a vernier caliper is generally used for measuring an inner hole (as shown in fig. 1), however, the measuring process of the vernier caliper has many limitations, for a large-diameter hole, accurate measurement cannot be performed due to the limitation of a size range, for a small-diameter closed inner hole, measurement cannot be performed due to the fact that the vernier caliper cannot penetrate into the inner hole, and some irregular inner diameters cannot be measured; the corresponding inner hole size needs to be accurately measured in the process of equipment installation, and the targeted processing or the purchase of spare parts is facilitated.

Because the diameter size of different equipment bores has very big difference, consequently, the commonality of traditional dipperstick is lower, and measuring range is less, and the hole is the position space ratio limit sometimes, and measuring tool that the structure is complicated is difficult deepening wherein measure, consequently, needs a urgent need to design a simple structure, the internal control measuring tool of commonality.

Disclosure of Invention

The utility model aims to provide an inner hole measuring device, which solves the problems that the traditional measuring scale in the prior art has lower universality and smaller measuring range in the process of measuring the inner hole; the measurement is difficult due to inconvenient operation, the result accuracy is low and the like

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:

the utility model provides a hole measuring device, it includes:

one ends of the two measuring arms are hinged, and the other ends of the two measuring arms rotate freely;

and the angle display part is arranged at the hinged position of the two measuring arms and used for displaying the opening angles of the two measuring arms.

In some embodiments of the present application, the measuring arm includes a fixed portion and a telescopic portion that moves up and down along the fixed portion.

In some embodiments of the present application, a telescopic cavity is provided on the fixing portion, one end of the telescopic portion is located in the telescopic cavity, and a fastening member is further provided on the fixing portion for fixing the telescopic portion at any position in the telescopic cavity.

In some embodiments of the present application, the fastening member is a fastening screw, a threaded hole is provided on the outer wall of the fixing portion, and the fastening screw is screwed on the outer wall of the fixing portion for compressing the telescopic portion.

In some embodiments of the present application, the fixed portion is a cylindrical structure and the telescoping portion is a cylindrical structure.

In some embodiments of the present application, a contact surface is disposed on the telescopic portion, the contact surface is disposed on an outer wall of the telescopic portion, and the contact surface is of a planar structure and is used for increasing contact with the fastening screw.

In some embodiments of the present application, the angle display is a dial, the center of the dial coinciding with the hinge position of the two measuring arms.

In some embodiments of the present application, the dial is a semi-circular dial, the dial being a transparent material.

In some embodiments of the present application, the end of the measuring arm is further provided with a positioning element, the positioning element is a sharp-angled structure, and the direction of the positioning element is toward the side wall of the inner hole to be measured.

In some embodiments of the present application, the angle between the positioning element and the measuring arm is an obtuse angle.

Compared with the prior art, the utility model discloses an advantage is with positive effect:

through mutual rotation between two articulated measuring arms, turn into the record of angle with the diameter size of the hole of awaiting measuring, through the angle that this measurement hole corresponds of angle display spare record, after the measurement, take out this interior accuse measuring device, measure the hole diameter that this angle corresponds, simple structure easily operates, measuring range is big, does not receive the influence of hole position, and the commonality is strong, can measure the hole of arbitrary shape, and measurement accuracy is higher.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when read in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic diagram of a process of measuring an inner hole by using a common vernier caliper;

FIG. 2 is a schematic view of a measurement principle of an embodiment of an internal control measurement device according to the present application;

in the figure, the position of the upper end of the main shaft,

10. an inner bore;

20. a measuring arm; 21. a fixed part; 22. a telescopic part; 23. a positioning member; 24. a fastener;

30. an angle display member;

40. a vernier caliper.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments.

It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that in the description of the present invention, the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise explicitly stated or limited. For example, it may be a fixed connection, a detachable connection or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Traditional hole measurement generally uses slide caliper, with slide caliper's two measuring angle deep into downthehole, the straight-line distance between two measurements of direct measurement, when the size in hole is great, slide caliper's measuring range just receives the restriction, perhaps treats that the opening part of measuring hole has when blockking, and slide caliper's measurement foot also can not deep into downthehole, is difficult to realize the accurate measurement.

The traditional inner hole measurement generally uses vernier caliper 40, two measuring angles of vernier caliper 40 go deep into downthehole, the straight line distance between two measurements of direct measurement, when the size in hole is great, vernier caliper 40's measuring range just receives the restriction, perhaps waits to measure when the opening part in hole has blockking, and vernier caliper 40's measurement foot also can not go deep into downthehole, is difficult to realize accurate measurement.

As shown in fig. 2, the present application provides an inner hole 10 measuring device, which includes two measuring arms 20 hinged to each other, and an angle display member 30, wherein one ends of the two measuring arms 20 are hinged to each other, and the other ends are free to rotate, and the angle display member 30 is disposed at the hinged position of the two measuring arms 20 for displaying the opening angle of the two measuring arms 20.

When the angle display device is used for measurement, the hinged ends of the two measuring arms 20 are horizontally placed in the inner hole 10, the two measuring arms 20 are opened, the free ends of the two measuring arms 20 are respectively contacted with the side wall of the inner hole 10 to be measured, the angle display part 30 measures the opening angle between the two measuring arms 20, and the angle of the angle display part 30 at the moment is recorded.

The two measuring arms 20 are taken out after being retracted, and the distance between the free ends of the two measuring arms 20 at the angle, namely the size of the inner hole 10 is obtained through internal control and external measurement.

Specifically, the measuring arm 20 includes a fixing portion 21 and an expansion portion 22, the expansion portion 22 moves up and down along the fixing portion 21, and the expansion portion 22 of the measuring arm 20 extends out of the fixing portion 21 by a suitable length to adapt to the size of the inner hole 10 for inner holes 10 with different sizes.

Preferably, the fixing portion 21 is provided with a telescopic cavity, one end of the telescopic portion 22 is located in the telescopic cavity and can move along the telescopic cavity, and the fixing portion 21 is further provided with a fastening member 24 for fixing the telescopic portion 22 at any position in the telescopic cavity.

The fastening piece 24 is a fastening screw, a threaded hole is formed in the outer wall of the fixing portion 21, the fastening screw is in threaded connection with the outer wall of the fixing portion 21, the fastening screw is loosened, the telescopic portion 22 can move up and down along the telescopic cavity of the fixing portion 21, when the target length is reached through moving, the fastening screw is screwed, the fastening screw presses the telescopic portion 22 inwards, and the telescopic portion 22 is fixed on the fastening piece 24 at a certain height.

For convenience of processing and use, the fixing portion 21 has a cylindrical structure, and the expansion portion 22 has a cylindrical structure. Be provided with the contact surface on the pars contractilis 22, be convenient for with fastening screw connection contact, the contact surface sets up on the outer wall of pars contractilis 22, the contact surface be planar structure for the increase with fastening screw's contact, the fastening position of being convenient for.

Specifically, for more convenient measurement, the angle display 30 is a dial, and the center of the dial coincides with the hinge position of the two measuring arms 20. The calibrated scale is a semicircular calibrated scale which is made of transparent materials, so that the included angle between the measuring arms 20 can be observed conveniently in multiple directions.

The tail end of the measuring arm 20 is further provided with a positioning part 23, the positioning part 23 is of a sharp-angled structure, and the direction of the positioning part 23 faces the side wall of the inner hole 10 to be measured. The included angle between the positioning piece 23 and the measuring arms 20 is an obtuse angle, and when the opening angle between the two measuring arms 20 is large, the positioning piece 23 and the hole wall of the inner hole 10 to be measured are kept in a contact state, so that the measurement is accurate.

When the device is used, the locking screw is loosened, the measuring arm 20 is contracted to the shortest, and the two measuring arms 20 are closed, so that the occupied space is the most compact;

extending the inner hole 10 measuring device into the hole, extending the telescopic part 22 to a proper length according to the size of the inner hole 10, and screwing a locking screw; the included angle between the two measuring arms 20 is adjusted to be in contact with the side wall of the inner hole 10, the included angle of the measuring arms 20 is opened to the maximum, and the distance between the positioning pieces 23 is the size of the inner hole 10.

Recording the included angle between the two measuring arms 20 displayed by the angle display member 30 in this state; then the measuring arms 20 are closed and close, and the inner hole 10 is slowly moved out; the measuring arm 20 is then rotated to the recorded angle and the distance between the two positioning elements 23 is measured.

The novel related inner hole 10 measuring tool is used, so that the measuring range is large; is not limited by the size of the inner hole 10; the whole structure is simple, convenient and fast, and can measure circles, ellipses, slotted holes with keys and the like in any shapes; the measurement precision is higher.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention, which is claimed.

Claims (10)

1. An internal bore measurement device, comprising:

one ends of the two measuring arms are hinged, and the other ends of the two measuring arms rotate freely;

and the angle display part is arranged at the hinged position of the two measuring arms and used for displaying the opening angles of the two measuring arms.

2. The bore measurement device of claim 1,

the measuring arm comprises a fixing part and a telescopic part, and the telescopic part can move up and down along the fixing part.

3. The bore measurement device of claim 2,

the telescopic fixing device is characterized in that a telescopic cavity is formed in the fixing part, one end of the telescopic part is located in the telescopic cavity, and a fastening piece is further arranged on the fixing part and used for fixing the telescopic part at any position in the telescopic cavity.

4. An inner bore measuring device according to claim 3,

the fastener is fastening screw, be provided with the screw hole on the fixed part outer wall, fastening screw threaded connection in on the fixed part outer wall is used for compressing tightly the pars contractilis.

5. An inner bore measuring device according to claim 4,

the fixed part is of a cylindrical structure, and the telescopic part is of a cylindrical structure.

6. An inner bore measuring device according to claim 5,

the telescopic part is provided with a contact surface, the contact surface is arranged on the outer wall of the telescopic part, and the contact surface is of a plane structure and is used for increasing the contact with the fastening screw.

7. The bore measurement device of claim 1,

the angle display piece is a dial, and the circle center of the dial is coincided with the hinged positions of the two measuring arms.

8. An inner bore measuring device according to claim 7,

the dial is a semicircular dial which is made of transparent materials.

9. The bore measurement device of claim 1,

the tail end of the measuring arm is further provided with a positioning piece which is of a sharp-angled structure, and the direction of the positioning piece faces to the side wall of the inner hole to be measured.

10. An internal bore measurement device according to claim 9,

the included angle between the positioning piece and the measuring arm is an obtuse angle.

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