CN111089526A - Auxiliary measuring tool for stepped hole - Google Patents
Auxiliary measuring tool for stepped hole Download PDFInfo
- Publication number
- CN111089526A CN111089526A CN201911416806.8A CN201911416806A CN111089526A CN 111089526 A CN111089526 A CN 111089526A CN 201911416806 A CN201911416806 A CN 201911416806A CN 111089526 A CN111089526 A CN 111089526A
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- China
- Prior art keywords
- extension bar
- measuring
- stepped
- fixed shaft
- extension
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
- G01B5/12—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters internal diameters
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention relates to an auxiliary measuring tool for a stepped hole, and belongs to the technical field of inner aperture measuring equipment. The invention solves the problem that the inner diameters of the existing holes with the ladder-shaped holes are not good to measure. The invention comprises a fixed shaft; the extension bars are symmetrically arranged on two sides of the fixed shaft and are hinged with the fixed shaft; a measuring arm is arranged on one measuring side of the extension bar and is hinged with the extension bar through a torsion spring, and a screw limiting device is arranged between the extension bar and the measuring arm; the built-in indicating circuit is used for prompting the measurement of the inner hole; and the indicating device is used for recording the position of the extension bar during the measurement of the inner hole.
Description
Technical Field
The invention relates to an auxiliary measuring tool for a stepped hole, and belongs to the technical field of inner aperture measuring equipment.
Background
As new products are developed and manufacturing processes continue to increase, stepped parts consisting of several holes of different diameters are encountered. The inner holes of the parts are mostly longer, the hole structures are small outside and large inside in a step shape, and are limited by space, and the diameters of the inner holes of the parts cannot be directly measured by adopting conventional measuring tools.
Disclosure of Invention
The invention aims to overcome the defects of the inner diameter measurement of some conventional stepped holes, and provides an auxiliary measuring tool for the stepped holes.
The invention is realized by adopting the following technical scheme:
a stepped-hole auxiliary measuring tool, comprising:
a fixed shaft;
the extension bars are symmetrically arranged on two sides of the fixed shaft and are hinged with the fixed shaft;
a measuring arm is arranged on one measuring side of the extension bar and is hinged with the extension bar through a torsion spring, and a screw limiting device is arranged between the extension bar and the measuring arm;
the built-in indicating circuit is used for prompting the measurement of the inner hole;
the indicating device is used for recording the position of the extension bar during the measurement of the inner hole;
the indicating device comprises a pointer fixed on the extension bar on one side, and a graduated scale is arranged on the extension bar on the other side and penetrates through the pointer and is matched with the pointer; the built-in indicating circuit comprises a power supply fixed on the inner side of the fixed shaft, the power supply is respectively connected to the screw limiting devices on two sides through a lead, the measuring arms are electrically connected through leads, the measuring arms and the extension bar are insulated, and the leads are connected with a light emitting diode and a resistor;
the front side of the measuring arm, which is contacted with the inner hole during measurement, is made of insulating materials.
The inner side of the extension bar is hollow, and the lead passes through the hollow part of the extension bar and then is connected to the measuring arm.
The light emitting diode is arranged on one side of the fixed shaft.
The screw limiting device comprises a limiting seat fixed on the extension bar and a limiting screw connected with the limiting seat in a threaded manner.
The extension bar is a telescopic extension bar and comprises a front bar hinged with the fixed shaft, a rear bar sleeved with the front bar is arranged on the lower portion of the front bar, and the rear bar is connected with the front bar in a telescopic sliding mode.
The front rod is provided with two or more positioning holes, the inner side of the upper end of the rear rod is provided with a compression spring plate, one side of the compression spring plate is provided with a positioning ball, the positioning ball extends out of the rear rod, and the positioning ball is matched with the positioning holes.
The invention has the beneficial effects that:
(1) the auxiliary measuring tool for the stepped hole is provided with the built-in indicating circuit, whether the measuring arm is in contact with the screw limiting device or not can be obtained through the built-in indicating circuit, the position of the lengthening rod is determined through the pointer and the graduated scale, and finally the size between the measuring arms is measured through the measuring tool, so that the size of the inner diameter of the stepped hole is obtained, and the auxiliary measuring tool can be suitable for stepped holes of different specifications;
(2) according to the auxiliary measuring tool for the stepped holes, the extension rod can be telescopic, and the telescopic extension rod is suitable for more stepped holes with different specifications;
(3) according to the auxiliary measuring tool for the stepped hole, the measuring arm can gradually contact the inner side wall of the stepped hole through the screw limiting device, when the measuring arm contacts and continues to increase the angle of the extension rod, the light-emitting diode can be extinguished, so that the critical point of extinguishment and lightening can be well judged, the precision measurement can be conveniently and well carried out, when the measuring arm is located at the limiting position, the circuit is connected, the light-emitting diode is lightened, otherwise, the light-emitting diode is extinguished, and whether the indicating mechanism reaches the limiting position or not is determined.
Drawings
FIG. 1 is a front view of an embodiment of the present invention;
FIG. 2 is a top view of an embodiment of the present invention;
FIG. 3 is a front view of a second embodiment of the present invention;
FIG. 4 is a cross-sectional view of the inside of the rear rod of the second embodiment of the present invention;
FIG. 5 is an adaptation state diagram for an embodiment of the present invention;
in the figure: 1. a built-in indication circuit; 1-1, a power supply; 1-2, light emitting diodes; 1-3, conducting wires; 2. lengthening a rod; 2-1, a front rod; 2-2, a rear rod; 2-3, positioning holes; 2-4, positioning a ball; 2-5, compressing the elastic sheet; 3. a screw rod limiting device; 4. a measuring arm; 5. a torsion spring; 6. a pointer; 7. a graduated scale; 8. and fixing the shaft.
Detailed Description
The invention will be further explained with reference to the drawings.
Example one
As shown in fig. 1-2 and 5, the auxiliary measuring tool for stepped holes according to the present invention includes:
a fixed shaft 8;
the extension bars 2 are symmetrically arranged on two sides of the fixed shaft 8, and the extension bars 2 are hinged with the fixed shaft 8;
a measuring arm 4 is arranged on one measuring side of the extension bar 2, the measuring arm 4 is hinged with the extension bar 2 through a torsion spring 5, and a screw limiting device 3 is arranged between the extension bar 2 and the measuring arm 4;
the built-in indicating circuit 1 is used for prompting inner hole measurement;
the indicating device records the position of the extension bar 2 when measuring the inner hole;
the indicating device comprises a pointer 6 fixed on the extension bar 2 on one side, a graduated scale 7 is arranged on the extension bar 2 on the other side, and the graduated scale 7 penetrates through the pointer 6 and is matched with the pointer 6; the built-in indicating circuit 1 comprises a power supply 1-1 fixed on the inner side of a fixed shaft 8, the power supply 1-1 is respectively connected to screw limiting devices 3 on two sides through leads 1-3, the measuring arms 4 are electrically connected through the leads 1-3, the measuring arms 4 are insulated from the extension bar 2, and the leads 1-3 are connected with light emitting diodes 1-2 and resistors; the front side of the measuring arm 4, which is contacted with the inner hole during measurement, is made of insulating materials.
The inner side of the extension bar 2 is hollow, and the lead wires 1-3 are connected to the measuring arm 4 after passing through the hollow part of the extension bar 2.
The light emitting diode 1-2 is arranged on one side of the fixed shaft 8.
The screw limiting device 3 comprises a limiting seat fixed on the extension bar and a limiting screw connected with the limiting seat through threads.
The working process is as follows:
when the arm 4 contacts the screw limiting device 3, the built-in indicating circuit 1 can be connected, and at the moment, the arm 4, the lead wires 1-3 and the screw limiting device 3 form a closed loop.
Two screw rod stop devices 3 are adjusted first, then two extension bars 2 and a measuring arm 4 are closed, and the measuring arm 4 is stretched into an inner hole of a part. Increasing the included angle between the two extension bars 2 until the measuring arm 4 contacts the wall surface of the inner hole and extrudes the torsion spring 5, so that the measuring arm 4 leaves the limiting position, the circuit is disconnected, and the light emitting diode 1-2 is turned off; then the included angle between the extension bars 2 is gradually reduced until the indicator light is on, and the measuring arm 4 is just at the limit position at the moment. And reading the scale of the graduated scale 7 where the pointer 6 is positioned, taking out the measuring tool, restoring the pointer 6 to the position just read, and measuring the distance between the vertexes of the two measuring arms 4 by using the standard measuring tool, namely the hole diameter of the inner hole.
When the current side aperture is less, can be through adjusting screw stop device 3, make volume arm 4 in reasonable within range, after the aperture through the front side, open extension bar 2, make cantilever 4 contact the hole aperture, continue to open the angle between extension bar 2, can make volume arm 4 contact hole inner wall, under the extrusion, can make volume arm 4 leave limit position, the circuit disconnection, emitting diode 1-2 extinguishes, it is bright to the pilot lamp to reduce contained angle between the extension bar 2 again gradually, this moment volume arm 4 just is in limit position, and emitting diode 1-2 lights, just be in limit position, follow-up measurement work operation is with above.
Example two
As shown in fig. 3-5, the extension bar 2 is a telescopic extension bar, and comprises a front bar 2-1 hinged with a fixed shaft 8, a rear bar 2-2 sleeved with the front bar 2-1 is arranged at the lower part of the front bar 2-1, and the rear bar 2-2 is telescopically and slidably connected with the front bar 2-1.
The front rod 2-1 is provided with two or more positioning holes 2-3, the inner side of the upper end of the rear rod 2-2 is provided with a compression spring plate 2-5, one side of the compression spring plate 2-5 is provided with a positioning ball 2-4, the positioning ball 2-4 extends out of the rear rod 2-2, and the positioning ball 2-4 is matched with the positioning holes 2-3.
The working process is as follows: the rear rod 2-2 can stretch out and draw back from the front rod 2-1, and the length of the extension rod 2 is selected according to different stepped holes, so that the extension rod can adapt to more auxiliary measurements of different stepped holes. The rest is the same as the first embodiment.
The invention is mainly applied to places for auxiliary measurement of the stepped hole
Of course, the foregoing is only a preferred embodiment of the invention and should not be taken as limiting the scope of the embodiments of the invention. The present invention is not limited to the above examples, and equivalent changes and modifications made by those skilled in the art within the spirit and scope of the present invention should be construed as being included in the scope of the present invention.
Claims (6)
1. A stepped-hole auxiliary measuring tool, comprising:
a fixed shaft (8);
the extension bars (2) are symmetrically arranged on two sides of the fixed shaft (8), and the extension bars (2) are hinged with the fixed shaft (8);
a measuring arm (4) is arranged on one measuring side of the extension bar (2), the measuring arm (4) is hinged with the extension bar (2) through a torsion spring (5), and a screw limiting device (3) is arranged between the extension bar (2) and the measuring arm (4);
the built-in indicating circuit (1) is used for prompting inner hole measurement;
the indicating device is used for recording the position of the extension bar (2) during the measurement of the inner hole;
the indicating device comprises a pointer (6) fixed on the extension bar (2) on one side, a graduated scale (7) is arranged on the extension bar (2) on the other side, and the graduated scale (7) penetrates through the pointer (6) and is matched with the pointer (6); the built-in indicating circuit (1) comprises a power supply (1-1) fixed on the inner side of a fixed shaft (8), the power supply (1-1) is respectively connected to screw limiting devices (3) on two sides through leads (1-3), the measuring arms (4) are electrically connected through the leads (1-3), the measuring arms (4) and the extension rod (2) are insulated, and the leads (1-3) are connected with light emitting diodes (1-2) and resistors;
the front side of the measuring arm (4) which is contacted with the inner hole during measurement is made of insulating materials.
2. The stepped-hole auxiliary measuring tool of claim 1, wherein: the inner side of the extension bar (2) is hollow, and the lead (1-3) passes through the hollow part of the extension bar (2) and then is connected to the measuring arm (4).
3. The stepped-hole auxiliary measuring tool of claim 2, wherein: the light emitting diodes (1-2) are arranged on one side of the fixed shaft (8).
4. The stepped-hole auxiliary measuring tool of claim 3, wherein: the screw limiting device (3) comprises a limiting seat fixed on the extension bar and a limiting screw connected with the limiting seat through threads.
5. The stepped-hole auxiliary measuring tool according to any one of claims 1 to 4, wherein: extension bar (2) be retractable extension bar, including with fixed axle (8) articulated preceding pole (2-1), the lower part of preceding pole (2-1) is equipped with rather than the back pole (2-2) that cup joints, back pole (2-2) with preceding pole (2-1) scalable sliding connection.
6. The stepped-hole auxiliary measuring tool of claim 5, wherein: the front rod (2-1) is provided with two or more positioning holes (2-3), the inner side of the upper end of the rear rod (2-2) is provided with a compression spring piece (2-5), one side of the compression spring piece (2-5) is provided with a positioning ball (2-4), the positioning ball (2-4) extends out of the rear rod (2-2), and the positioning ball (2-4) is matched with the positioning holes (2-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911416806.8A CN111089526A (en) | 2019-12-31 | 2019-12-31 | Auxiliary measuring tool for stepped hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911416806.8A CN111089526A (en) | 2019-12-31 | 2019-12-31 | Auxiliary measuring tool for stepped hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111089526A true CN111089526A (en) | 2020-05-01 |
Family
ID=70398318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911416806.8A Withdrawn CN111089526A (en) | 2019-12-31 | 2019-12-31 | Auxiliary measuring tool for stepped hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111089526A (en) |
-
2019
- 2019-12-31 CN CN201911416806.8A patent/CN111089526A/en not_active Withdrawn
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200501 |
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| WW01 | Invention patent application withdrawn after publication |