CN216159783U - O-shaped ring inner diameter measuring tool - Google Patents

Abstract

The utility model discloses an O-shaped ring inner diameter measuring tool which comprises a measuring scale, a conical pedestal and a tray for bearing an O-shaped ring, wherein the tray is sleeved in the conical pedestal and can move along the axis of the conical pedestal, the tray comprises a tray bracket for enabling the tray to be in a horizontal state and a plurality of first valve separating rings with first through holes, a first annular cavity is formed at the positions of the first through holes, the tray bracket penetrates through the first annular cavity and is in clearance fit with the first annular cavity along the radius direction of the conical pedestal, and the measuring scale is used for measuring the O-shaped ring on the tray; the utility model ensures the minimum circumferential clearance between the split rings by increasing or decreasing the number of the split rings while adjusting the inner diameter, thereby ensuring the minimum deformation of the O-shaped ring in the vertical direction during sliding.

Description

O-shaped ring inner diameter measuring tool

Technical Field

The utility model relates to the technical field of measuring tools, in particular to an O-shaped ring inner diameter measuring tool.

Background

The O-ring is a seal ring with a circular cross section, which can be used to seal a fluid medium. The main size parameters of the O-shaped ring are the inner diameter and the wire diameter, and if the inner diameter and the wire diameter of the O-shaped ring are not proper, the sealing effect of the fluid medium is seriously influenced. However, since the O-ring is generally made of rubber, which is an elastomer, it is very difficult to accurately measure the inner diameter. When the caliper is used for measurement, the O-shaped ring is greatly deformed by the measuring force, and then a large measuring error is generated. The more accurate measuring tool is a conical rod with diameter scales, the measuring method is that the large end of the conical rod is placed downwards, the small end of the conical rod is placed vertically, an O-shaped ring to be measured is horizontally sleeved into the conical rod from the small end of the conical rod, the O-shaped ring can stay at a certain horizontal position of the conical rod after falling freely, and the diameter of the section of the conical rod corresponding to the position is the inner diameter of the O-shaped ring. The problem with this approach is that: 1. because the friction force between the conical rod and the inner surface of the O-shaped ring dynamically changes in the gliding process of the O-shaped ring, the stop surface of the O-shaped ring on the conical rod is not an ideal horizontal plane, and the deviation of the stop surface to the ideal horizontal plane is large; 2. the contact line of the O-shaped ring and the conical rod is shielded by the O-shaped ring, so that accurate identification cannot be realized, and the reading of the size scales is random. In order to solve the problem, a pressing code and a guide sleeve can be additionally arranged, but the taper of the conical rod is limited to be not too large, otherwise, the pressing code and the guide sleeve cannot be matched with the conical rod. The taper of such a taper rod is typically 1: 100, a large number of conical rods with different diameters are required to be equipped for measuring O-shaped rings with different inner diameters, so that the measuring tool is generally only suitable for small-size O-shaped rings with the diameter less than 50 mm. The patent CN201820327319.9 discloses adopts a 60-degree large taper cone, a sliding rod and a sliding sleeve are arranged in the cone marked with diameter scale marks, three sliding grooves are arranged on the cone, three horizontal supporting rods are fixed on the sliding sleeve and extend out of the sliding grooves, an O-shaped ring is sleeved on the cone to freely fall on a bearing rod during measurement, the bearing rod is moved downwards until the O-shaped ring stops moving, and the inner diameter of the O-shaped ring is read on the cone. The measuring tool can prevent the O-shaped ring from deflecting to a certain extent when the inner diameter of the O-shaped ring is measured, and the reading is also convenient. However, the measuring tool slides downwards by means of the dead weight of the O-shaped ring, and the natural stop position of the O-shaped ring on the cone does not correspond to the real inner diameter of the cone due to the elasticity of the O-shaped ring, the difference of friction force along the circumference of the cone and the like; in addition, because the taper of the cone is large, a large error is generated by directly reading from the scale marks on the cone; finally, because of the elasticity of the O-ring, the three horizontal support rods make point contact with the O-ring, and it is not possible to ensure that the entire O-ring is on a horizontal plane. In order to solve the problems, the utility model provides a foldable six-degree-of-freedom parallel posture adjusting mechanism to solve the problem that the six-degree-of-freedom parallel mechanism cannot accommodate articles.

Disclosure of Invention

The utility model aims to provide an O-shaped ring inner diameter measuring tool to achieve the purpose of increasing the inner diameter measuring precision of an O-shaped ring.

In order to achieve the purpose, the utility model provides the following scheme:

the utility model provides an O type circle internal diameter measuring tool, includes dipperstick, toper pedestal and is used for bearing the tray of O type circle, the tray cover is established in the toper pedestal and can follow the axis of toper pedestal removes, the tray is including the tray support that is used for making the tray be in the horizontality and a plurality of first valve separating ring that has first through-hole, and is a plurality of first through-hole position forms first ring cavity, the tray support runs through first ring cavity and with first ring cavity follows the radius direction clearance fit of toper pedestal, the dipperstick is used for measuring and is located O type circle on the tray.

Preferably, the O-ring inner diameter measuring tool further comprises a pressure plate used for abutting against the O-ring and enabling the O-ring not to deform, the pressure plate comprises a pressure plate support and a plurality of second valve separating rings, the pressure plate support enables the pressure plate to be in a horizontal state, the second valve separating rings are provided with second through holes, the second through holes form second annular cavities, and the pressure plate support penetrates through the second annular cavities and is in clearance fit with the second annular cavities along the radius direction of the conical pedestal.

Preferably, the O-ring inner diameter measuring tool further includes a base, the tapered pedestal is mounted on the base, and a measurement correction table for correcting measurement data is pasted on the base.

Preferably, the base is provided with a foot at the bottom thereof for supporting the base.

Preferably, the dipperstick includes vernier scale, main scale and slide caliper, the main scale is installed perpendicularly on the base, slide caliper with the vernier scale is all installed on the main scale, slide caliper with tray leg joint.

Preferably, a winding tension spring for fastening the first valve parting ring is installed at the circumferential edge of the tray.

Preferably, the spacing between adjacent first valve dividers is no more than 5 mm.

Preferably, the spacing between adjacent second divider rings is no more than 5 mm.

Compared with the prior art, the utility model has the following technical effects:

according to the O-shaped ring inner diameter measuring tool provided by the utility model, the inner diameters of O-shaped rings with different sizes and specifications in a large range can be accurately measured by adopting the conical pedestal. The pressure plate ensures that the O-shaped ring slides down in place, so that no gap is left between the O-shaped ring and the conical pedestal. The tray is used for guaranteeing that the O-shaped ring slides down stably along the frustum and the stopping surface is a horizontal plane. The vernier caliper is connected with the tray through the tray retainer, and the main scale and the vernier are scaled according to the diameter of the horizontal section of the frustum, so that the reading can be quickly, conveniently and accurately carried out. The pressure disk and the tray all adopt the split ring structure, can guarantee through increase and decrease split ring number that the circumferential clearance between the split ring is minimum when the adjustment internal diameter size, but the minimum of deformation of O shape circle in vertical direction when this maximum assurance pressure disk and tray centre gripping O shape circle gliding. The clearance fit between the tray and the tray support frame ensures that the tray split ring can slide on the horizontal plane, and the tension force generated by the tension spring and the conical surface structure of the inner hole of the tray ensure that the inner hole of the tray is attached to the frustum at any time, so that the level of the tray is ensured.

Drawings

In order to more clearly illustrate the present invention or technical solutions in the prior art, 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 only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a schematic structural view of an O-ring inner diameter measuring tool;

FIG. 2 is a schematic structural view of a tray of the O-ring inner diameter measuring tool;

wherein, 1, a base; 2. a conical pedestal; 3. a tray; 4. a tray support; 5. a platen; 6. a platen holder; 7. an O-shaped ring; 8. winding a tension spring; 9. fine tuning a ruler; 10. a main scale; 11. a vernier caliper; 12. measuring a correction table; 13. a support leg; 14. a first shunt ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model aims to provide an O-shaped ring inner diameter measuring tool to achieve the purpose of increasing the inner diameter measuring precision of an O-shaped ring.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1-2, an O-ring inner diameter measuring tool includes a measuring scale, a tapered pedestal 2 and a tray 3 for carrying an O-ring 7, where the tray 3 is sleeved in the tapered pedestal 2 and can move along an axis of the tapered pedestal 2, the tray 3 includes a tray support 4 for enabling the tray 3 to be in a horizontal state and a plurality of first split rings 14 having first through holes, the first through holes form first annular cavities, the tray support 4 penetrates through the first annular cavities and is in clearance fit with the first annular cavities along a radius direction of the tapered pedestal 2, and the measuring scale is used for measuring the O-ring 7 on the tray; according to the utility model, the circumferential clearance between the split rings is ensured to be minimum by increasing or decreasing the number of the split rings while the inner diameter is adjusted, so that the minimum deformation of the O-shaped ring 7 in the vertical direction during downward sliding can be ensured to the greatest extent.

Referring to fig. 1, the O-ring 7 inner diameter measuring tool further comprises a pressure plate 5 for abutting against the O-ring 7 and not deforming the O-ring 7, wherein the pressure plate 5 comprises a pressure plate bracket 6 for enabling the pressure plate 5 to be in a horizontal state and a plurality of second valve parting rings with second through holes, the second through holes form a second annular cavity, and the pressure plate bracket 6 penetrates through the second annular cavity and is in clearance fit with the second annular cavity along the radius direction of the conical pedestal 2; the pressure disk 5 guarantees that O type circle 7 glides and puts in place, makes not leave the space between O type circle 7 and the frustum, can guarantee through increase and decrease split ring number that the circumferential clearance is minimum between the split ring when the adjustment internal diameter size, but the furthest guarantees that O type circle 7 is minimum in the ascending deformation of vertical side when pressure disk 5 and 3 centre gripping O type circles of tray glide 7 from this.

Referring to fig. 1, the tool for measuring the inner diameter of the O-ring 7 further includes a base 1, a tapered pedestal 2 is mounted on the base 1, and a measurement correction table 12 for correcting measurement data is attached to the base 1, and since the taper of the tapered pedestal is large, the diameter of the cross section of the tapered rod corresponding to the horizontal surface of the tray 3 is not the straight inside diameter of the O-ring 7, and therefore, it must be corrected by the measurement correction table 12.

Referring to fig. 1, a foot 13 for supporting the base 1 is installed at the bottom of the base 1.

Referring to fig. 1, the measuring scale includes a vernier scale 9, a main scale 10 and a vernier caliper 11, the main scale 10 is vertically installed on a base 1, the vernier caliper 11 and the vernier scale 9 are both installed on the main scale 10, the vernier caliper 11 is connected with a pallet support 4, the vernier caliper 11 is connected with a pallet 3 through the pallet support 4, and the main scale 10 and the vernier caliper 11 are scaled with the horizontal section diameter of the conical pedestal 2, so that the reading can be rapidly, conveniently and accurately performed.

Referring to fig. 1, a winding tension spring 8 for fastening a first valve parting ring 14 is installed at the circumferential edge of the tray 3, and the tension force generated by the winding tension spring 8 ensures that the inner hole of the tray 3 is attached to the conical pedestal 2 at any time, so as to ensure that the tray 3 is horizontal.

Further, the distance between the adjacent first valve parting rings 14 is not more than 5mm, and the distance between the adjacent second valve parting rings is not more than 5mm, so that the deformation of the O-shaped ring 7 in the vertical direction is minimized.

The adaptation according to the actual needs is within the scope of the utility model.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (8)

1. The utility model provides an O type circle internal diameter measuring tool, its characterized in that includes dipperstick, toper pedestal and is used for bearing the tray of O type circle, the tray cover is established in the toper pedestal and can follow the axis of toper pedestal removes, the tray is including the tray support that is used for making the tray be in the horizontality and a plurality of first valve parting ring that has first through-hole, and is a plurality of first through-hole position forms first toroidal cavity, the tray support runs through first toroidal cavity and with first toroidal cavity is followed the radius direction clearance fit of toper pedestal, the dipperstick is used for measuring and is located O type circle on the tray.

2. The O-ring inner diameter measurement tool according to claim 1, further comprising a pressure plate for abutting against the O-ring without deforming the O-ring, wherein the pressure plate comprises a pressure plate support for keeping the pressure plate horizontal and a plurality of second pressure distribution rings having second through holes, wherein the second through holes form a second annular cavity, and the pressure plate support penetrates through the second annular cavity and is in clearance fit with the second annular cavity along a radius direction of the conical pedestal.

3. The O-ring inner diameter measurement tool according to claim 1, further comprising a base on which the tapered pedestal is mounted, and a measurement correction table for correcting measurement data is attached to the base.

4. The O-ring inner diameter measurement tool as claimed in claim 3, wherein a foot is mounted to the bottom of the base for supporting the base.

5. The O-ring inside diameter measurement tool of claim 3, wherein the measurement scale comprises a vernier scale, a main scale and a vernier caliper, the main scale is vertically installed on the base, the vernier caliper and the vernier scale are both installed on the main scale, and the vernier caliper is connected with the tray support.

6. The O-ring inner diameter measurement tool of claim 1, wherein a wrap spring is mounted to a circumferential edge of the tray for securing the first split ring.

7. The O-ring inner diameter measurement tool of claim 1, wherein a spacing between adjacent first split rings is no more than 5 mm.

8. The O-ring inner diameter measurement tool of claim 2, wherein the spacing between adjacent second split rings is no more than 5 mm.

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