CN203100641U - Diameter measurement tool for large-diameter O-shaped ring - Google Patents
Diameter measurement tool for large-diameter O-shaped ring Download PDFInfo
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- CN203100641U CN203100641U CN 201320009195 CN201320009195U CN203100641U CN 203100641 U CN203100641 U CN 203100641U CN 201320009195 CN201320009195 CN 201320009195 CN 201320009195 U CN201320009195 U CN 201320009195U CN 203100641 U CN203100641 U CN 203100641U
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Abstract
Disclosed in the utility model is a diameter measurement tool for a large-diameter O-shaped ring. The diameter measurement tool comprises a pedestal and a sliding table. Specifically, a first cylinder body with the diameter of D1 is arranged on the pedestal. The sliding table is connected with the pedestal by a sliding way; and a second cylinder body with the diameter of D1 is arranged on the sliding table. Besides, the connecting line of circle centers of the two cylinder bodies is parallel to an axis along which the pedestal and the sliding table make relative sliding motions. When the diameter measurement tool works, a to-be-measured O-shaped ring is sleeved on the two cylinder bodies; the pedestal and the sliding table slide relatively to adjust the distance L1 between the two cylinder bodies, so that the O-shaped ring is stretched straightly; and according to the diameters D1 of the cylinder bodies as well as the distance L1 between the circle centers of the two cylinder bodies, the diameter D of the to-be-measured O-shaped ring can be obtained by using the following formula: D=D1+2*L1/pi. According to the utility model, the measurement tool can be operated conveniently; and the measurement result has the high accuracy.
Description
Technical field
The utility model relates to field of measuring technique, particularly a kind of major diameter O shape loop diameter survey instrument.
Background technology
At present, accurately measure for the general sciagraphy that adopts of minor diameter O shape circle, and enclose for major diameter O shape, bigger frequently because of its diameter (internal diameter) and diameter of section, O shape circle can't keep the circle of a standard, so can't use slide calliper rule or projector equipment to measure its diameter, be converted into diameter after generally adopting the moccasin chi to measure its circumference.And measure O shape loop diameter with the moccasin chi, and the operator need enclose O shape that a section is stretching, and tape is close to measures, and operation is trouble comparatively, and the measurement result degree of accuracy is not high.
The utility model content
The utility model is in order to overcome defective in the above-mentioned prior art, by a kind of major diameter O shape loop diameter survey instrument, realizes conveniently and more accurately measure the size of major diameter O shape circle.
For achieving the above object, the utility model provides a kind of major diameter O shape loop diameter survey instrument, comprising: base, and which is provided with diameter is first right cylinder of D1; Slide unit, itself and base are slidingly connected, and slide unit is provided with diameter and also is second right cylinder of D1, and the axis of two relative slips with base and slide unit of cylindrical circle center line connecting parallels.During work, with O shape snare to be measured on two right cylinders, by relative sliding bottom and slide unit, regulate the distance L 1 between two right cylinders, make O shape circle to be measured exceptionally straight, can obtain the diameter D=D1+2 * L1/ π of O shape circle to be measured according to the distance L 1 in cylindrical diameter D1, two right cylinder centers of circle.
In the technique scheme, preferably, on base or the slide unit microswitch is installed, is used to judge whether O shape to be measured circle exceptionally straight, the trigger point of microswitch be located at the first right cylinder common tangent line parallel with the second right cylinder circle center line connecting on or protrude this tangent line 1-2mm.
In the technique scheme, further, base or slide unit are marked with scale, are used for directly reading the diameter D of O shape circle to be measured.
Compared with prior art, the utlity model has following beneficial effect:
1. need not to use the tape areal survey, directly can read diameter value, simple, convenient, and measurement result degree of accuracy height.
2. whether the installation microswitch is exceptionally straight in order to judge O shape circle, reduced the subjective judgement in the operation, and then reduced measuring error.
Description of drawings
Fig. 1 is the plan structure synoptic diagram (D1 is a cylinder diameter among the figure, and L1 is the distance in two right cylinder centers of circle) of the utility model major diameter O shape loop diameter survey instrument;
Fig. 2 is the perspective view of the utility model major diameter O shape loop diameter survey instrument;
Fig. 3 is the plan structure synoptic diagram after the utility model is installed microswitch;
Fig. 4 is the perspective view after the utility model is installed microswitch;
Fig. 5 is microswitch trigger point position view in the utility model (A is the trigger point among the figure);
Mark the following drawings mark in conjunction with the accompanying drawings thereon:
The 1-base, 11-first right cylinder, 2-slide unit, 22-second right cylinder, 3-diameter scale, 4-O shape circle, 5-microswitch, 51-switch pilot lamp.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but is to be understood that protection domain of the present utility model is not subjected to the restriction of embodiment.
As depicted in figs. 1 and 2, major diameter O shape loop diameter survey instrument of the present utility model mainly is made up of base 1 and slide unit 2, cooperates by dovetail guide between the two, can slide relatively along axis.First right cylinder 11 and second right cylinder 22 are arranged respectively on base 1 and the slide unit 2, and its diameter is D1, and the distance in two right cylinder centers of circle is L1, and the parallel axes of the line in its center of circle and base 1 and slide unit 2 relative slips.O shape to be measured circle 4 is enclosed between first right cylinder 11 and second right cylinder 22 and exceptionally straight, diameter (internal diameter) D=D1+L1 * 2/ π of O shape circle 4 so, this value can directly read by the proven diameter scale 3 in slide unit 2 lower right corner.D1=50mm in the present embodiment.
Exceptionally straight O shape circle can be by spring or counterweight traction slide unit 2, or relies on the gravity of slide unit 2 self to provide, and can adjust the size of the power of tightening by changing slide unit 2 angles of inclination.Whether exceptionally straight in order to judge O shape circle more accurately, so that obtain more accurate measurement result, preferably, as shown in Figure 3 and Figure 4, microswitch 5 is installed on base 1.Theoretically, the trigger point of microswitch 5 should be arranged on the first right cylinder 11 common tangent line (as shown in phantom in Figure 5) parallel with second right cylinder, 22 circle center line connectings on, but, in the reality, can't be triggered for fear of microswitch 5, the trigger point is arranged on a little (as A point among Fig. 5) on the position of departing from (protrusion) this tangent line.When O shape was enclosed 4 exceptionally straight (or near exceptionally straight), microswitch 5 was triggered, and switch pilot lamp 51 is bright, promptly can read diameters this moment.
Following table provides three groups of experimental datas of present embodiment:
| Project/(unit) | |
|
Experiment 3 |
| O shape circle nominal section diameter (mm) | 2.65 | 3.55 | 3.55 |
| O shape circle nominal inside diameter (mm) | 120 | 140 | 165 |
| This tool measurements (mm) | 120.2 | 139.9 | 165.3 |
| Tape measured value (mm) | 121 | 138 | 168 |
As can be seen, the measuring error of major diameter O shape loop diameter survey instrument of the present utility model is significantly less than available technology adopting tape measuring error.
The explanation of the measuring error that the utility model relates to:
1. the error of generation is departed from microswitch 5 trigger points.
Among Fig. 5, D1=50mm, O shape between two right cylinders circle physical length is 100mm, the trigger point A of microswitch 5 protrudes tangent line (shown in the dotted line) 1mm, and for the ease of calculating, and establishes on the perpendicular bisector that the trigger point is positioned at two circle center line connectings.At this moment, the L1(dotted line length that this instrument records) with actual deviation arranged, the length of side of press right-angle triangle concerns, can get L1=2 * (50 * 50-1 * 1)
0.5=99.98mm, the diameter that calculates O shape circle according to the L1 value that records and the actual diameter error of O shape circle are less than 0.006%, much smaller than about the diameter tolerance requirement (0.6%) of general O shape circle.
When the trigger point of microswitch 5 A protrudes tangent line (shown in the dotted line) 2mm, calculate L1=99.92mm after the same method, diameter error is about 0.022%, and also the diameter tolerance much smaller than general O shape circle requires about (0.6%).
2. stretching O shape circle causes being out of shape the error of generation
With nominal 3.55 * 122(diameter of section * internal diameter) nitrile rubber O shape circle be example, its elastic modulus E is pressed 6MPa calculating.It is that 100g(is roughly equal to 1N that O shape is enclosed exceptionally straight used counterweight, and wherein part is used for overcome friction) result of calculation such as following table:
| Project/(unit) | Numerical value and calculated value |
| The size of power (N) | 1 |
| Rubber modulus E(MPa) | 6 |
| O shape ring cross-section diameter (mm) | 3.55 |
| O shape circle internal diameter (mm) | 122 |
| O shape ring cross-section amasss (M 2） | 3.95919E-05 |
| O shape circumference (M) | 0.383274304 |
| O shape circle length stretcher strain amount (mm) | 0.403359122 |
| The internal diameter varies amount (mm) that stretching causes | 0.256786392 |
According to " the GB3452.1-82 hydropneumatic encloses rubber seal dimension series and tolerance with O shape ", this O shape circle id tolerance permissible value is ± 0.9mm.
More than disclosed only be a specific embodiment of the present utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into protection domain of the present utility model.
Claims (3)
1. a major diameter O shape loop diameter survey instrument is characterized in that, comprising:
Base, which is provided with diameter is first right cylinder of D1;
Slide unit, itself and base are slidingly connected, and slide unit is provided with diameter and also is second right cylinder of D1, and the axis of two relative slips with base and slide unit of cylindrical circle center line connecting parallels;
O shape snare to be measured is located on two right cylinders, by relative sliding bottom and slide unit, regulate the distance L 1 between two right cylinders, make O shape circle to be measured exceptionally straight, can obtain the diameter D=D1+2 * L1/ π of O shape circle to be measured according to the distance L 1 in cylindrical diameter D1, two right cylinder centers of circle.
2. major diameter O shape loop diameter survey instrument according to claim 1, it is characterized in that, on described base or the slide unit microswitch is installed, be used to judge whether O shape to be measured circle exceptionally straight, the trigger point of microswitch be located at the first right cylinder common tangent line parallel with the second right cylinder circle center line connecting on or protrude this tangent line 1-2mm.
3. major diameter O shape loop diameter survey instrument according to claim 1 is characterized in that described base or slide unit are marked with scale, is used for directly reading the diameter D of O shape circle to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320009195 CN203100641U (en) | 2013-01-09 | 2013-01-09 | Diameter measurement tool for large-diameter O-shaped ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320009195 CN203100641U (en) | 2013-01-09 | 2013-01-09 | Diameter measurement tool for large-diameter O-shaped ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203100641U true CN203100641U (en) | 2013-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320009195 Expired - Fee Related CN203100641U (en) | 2013-01-09 | 2013-01-09 | Diameter measurement tool for large-diameter O-shaped ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203100641U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913105A (en) * | 2013-01-09 | 2014-07-09 | 广西玉柴机器股份有限公司 | Large-diameter O-shaped ring diameter measuring tool |
| RU223470U1 (en) * | 2023-09-29 | 2024-02-19 | Общество с ограниченной ответственностью "ОБТЭК" | Device for measuring the diameter of a polymer ring |
-
2013
- 2013-01-09 CN CN 201320009195 patent/CN203100641U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913105A (en) * | 2013-01-09 | 2014-07-09 | 广西玉柴机器股份有限公司 | Large-diameter O-shaped ring diameter measuring tool |
| RU223470U1 (en) * | 2023-09-29 | 2024-02-19 | Общество с ограниченной ответственностью "ОБТЭК" | Device for measuring the diameter of a polymer ring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20170109 |