CN219829719U - Three-jaw diameter measuring head - Google Patents

Abstract

The utility model provides a three-jaw diameter measuring head, it includes the dabber, the base member, three dog, three spring, three contact of circumferencial direction equipartition, wherein, the base member constitutes the tubular structure that has the centre bore, and including the measuring head that is evenly divided into three fan-shaped block by three spouts, each spout bottom connection is fixed with the dog, the lateral wall is equipped with the cooperation portion that supplies the contact and slides along radial sliding in it, the dabber includes the conical head portion that is used for contacting with the conical surface of contact one end side and can penetrate the core bar portion of centre bore, still be equipped with on the contact and be used for placing the spring in the thrust portion in the middle of dog and the contact. The three jaw diameter measurement head further includes a cover plate mounted to the base via a second threaded bore in the sector block. The mating portion and the sliding guide portion are formed into a groove and convex strip mating structure. The stop block is fixed to a first threaded hole formed in the bottom of the chute by means of screw connection. Therefore, the diameter can be measured by utilizing the principle of determining a circle by three points, and the measurement accuracy is improved.

Description

Three-jaw diameter measuring head

Technical Field

The utility model relates to the technical field of measurement, in particular to a three-jaw diameter measuring head.

Background

The traditional two-point diameter measurement mode has the problems that the measurement size is not the diameter and the measurement result is greatly influenced by the roundness.

Disclosure of Invention

In order to solve the above problems, an object of the present utility model is to provide a three-jaw diameter measuring head capable of measuring a diameter by using a principle of determining a circle by three points by synchronous extension of three jaws.

According to one aspect of the utility model, there is provided a three-jaw diameter measuring head comprising a mandrel, a base body, three stoppers uniformly distributed in the circumferential direction, three springs correspondingly uniformly distributed in the circumferential direction, and three contacts correspondingly uniformly distributed in the circumferential direction, wherein the base body is formed into a cylindrical structure having a central hole and comprises a measuring head divided into three sector blocks uniformly by three sliding grooves, the stoppers are fixedly connected to the bottoms of the sliding grooves, the side walls are provided with sliding guide parts for sliding the mating parts of the contacts in the radial direction, the mandrel comprises a conical head part for contacting with a conical surface at one end side of the contacts and a core rod part capable of penetrating into the central hole, and the contacts are further provided with thrust parts for placing the springs between the stoppers and the contacts.

Preferably, the three jaw diameter measurement head further comprises a cover plate mounted to the base via a second threaded bore in the sector block.

Preferably, the base body further includes a stepped portion, and an outer peripheral wall of the base body is divided into the measuring head portion and the operating portion by the stepped portion.

Preferably, the engaging portion and the sliding guide portion are formed in a groove and ridge engaging structure.

Preferably, the stop is fixed to a first threaded hole provided in the bottom of the chute by means of a screw connection.

Preferably, the tapered surface and the mating portion are formed on one end side of the contact in an inclined crossing manner, and the thrust portion is provided to protrude from the bottom of the contact.

Preferably, the hollow surrounded by three sector-shaped blocks above the central hole has a diameter greater than the conical head.

The utility model has the advantages that: the diameter can be measured by utilizing the principle of determining a circle by three points, and the measurement accuracy is improved.

Drawings

Fig. 1 shows a front view of a three-jaw diameter measurement head according to an exemplary embodiment of the present utility model.

Fig. 2 shows a top view of the three jaw diameter measurement head.

Fig. 3 shows a left side view of the three jaw diameter measurement head.

Fig. 4 shows a cross-sectional view A-A of fig. 1.

Fig. 5 shows a top view of the base body of the three-jaw diameter measuring head.

Fig. 6 shows a side view of the contact of the three jaw diameter measurement head.

Detailed Description

Exemplary embodiments of the present utility model are described in detail below with reference to the attached drawings. The exemplary embodiments described below and illustrated in the drawings are intended to teach the principles of the present utility model to enable one skilled in the art to make and use the present utility model in a number of different environments and for a number of different applications. The scope of the utility model is therefore defined by the appended claims, and the exemplary embodiments are not intended, and should not be considered, as limiting the scope of the utility model. Moreover, for ease of description, where like elements are designated by like or similar reference numerals throughout the several views, the dimensions of the various parts shown are not necessarily drawn to scale, and references to orientation, such as longitudinal direction of the body, and orientation or positional relationship indicated above, below, left, right, top, bottom, etc., are all based on the orientation or positional relationship shown in the drawings, merely for ease of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the utility model. The following description of the embodiments emphasizes the differences between the embodiments, and the same or similar features may be referred to each other, so that technical features in the different embodiments may be freely combined to form further embodiments according to design needs for brevity and not described in detail. The terms "first," "second," "third," "fourth," and the like in the description and in the claims and drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

As shown in fig. 1-6, the three-jaw diameter measuring head according to the utility model integrally comprises a mandrel 1, a base body 2, three stop blocks 3 uniformly distributed in the circumferential direction, three springs 4 correspondingly uniformly distributed in the circumferential direction, three contacts 5 correspondingly uniformly distributed in the circumferential direction and a cover plate 6.

The mandrel 1 comprises a tapered head portion 11 and a core portion 12.

The base body 2 is formed in a cylindrical structure having a center hole 25 as a whole, and an outer peripheral wall is divided into upper and lower portions of the measuring head portion 20 and the operating portion 10 by a step portion 26 such as a flange. The measuring head is divided into three fan-shaped blocks 23 by three sliding grooves 21 on the whole, and the bottom of each sliding groove 21 is provided with a first threaded hole 22 for fastening the stop block 3 by means of a screw 31; the side walls are provided with sliding guides 27, such as ribs or grooves, to allow the mating portions 51, such as grooves or ribs, of the contacts 5 to slide radially therein.

The contact 5 has a tapered surface 50 formed on one end side thereof obliquely crossing the mating portion 51, and a thrust portion 52 protruding from the bottom.

In this way, in assembling, the stopper 3 may be mounted on the base 2, the contact 5 may be mounted on the base 2 along the sliding guide portion 27, the core rod portion 12 may be inserted into the center hole 25, the tapered head portion 11 may be brought into tapered contact with the contact 5, the spring 4 may be placed between the stopper 3 and the contact 5, and the cover 6 may be mounted on the base 2 via the second screw hole 24 of the sector block 23. At this time, the hollow portion 28 surrounded by the three sector-shaped blocks 23 above the center hole 25 has a larger diameter than the tapered head portion 11 so as to allow it to move up and down in the axial direction.

In actual use, the measuring head 20 is placed in the measured hole, the mandrel 1 is pulled to move downwards, the contact 5 extends outwards along the horizontal direction through the conical surface contact between the mandrel 1 and the contact 5, meanwhile, the spring 4 is compressed, when the radial outer end part of the contact 5 contacts the inner wall of the hole to be measured, the mandrel 1 stops moving, at the moment, the moving distance of the contact 5 can be calculated by detecting the moving distance of the mandrel 1 by using a laser sensor or a contact sensor, and then the diameter of the hole to be measured is calculated. After the measurement is completed, the external force on the mandrel 1 is released, the contact 5 is retracted under the action of the spring 4, and the mandrel 1 is restored to the original position under the action of the conical surface.

In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly, as they may be fixed, removable, or integral, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. While the utility model has been described with reference to various specific embodiments, it should be understood that numerous changes could be made within the spirit and scope of the inventive concepts described. Accordingly, it is intended that the utility model not be limited to the described embodiments, but that it have the full scope defined by the language of the following claims.

Claims (7)

1. The utility model provides a three-jaw diameter measurement head, a serial communication port, including dabber (1), base member (2), three dog (3) of circumferencial direction equipartition, three spring (4) of circumferencial direction corresponding equipartition, three contact (5) of circumferencial direction corresponding equipartition, wherein, base member (2) constitute to have the tubular structure of centre bore (25), and divide into measuring head (20) of three fan-shaped block (23) equally by three spout (21), each spout (21) bottom connection is fixed with dog (3), the lateral wall is equipped with the sliding guide portion (27) that supplies cooperation portion (51) of contact (5) to radially slide therein, dabber (1) are including conical head (11) and core bar portion (12) that can penetrate centre bore (25) that are used for contacting with conical surface (50) of contact (5) one end side, still be equipped with on contact (5) and be used for placing spring (4) in dog (3) and contact (5) intermediate thrust portion (52).

2. Three-jaw diameter measuring head according to claim 1, characterized in that it further comprises a cover plate (6) mounted on the base body (2) via a second threaded hole (24) on the segment (23).

3. The three-jaw diameter measurement head according to claim 1, wherein the base body (2) further includes a stepped portion (26), and an outer peripheral wall of the base body (2) is divided into the measurement head portion (20) and the operation portion (10) by the stepped portion (26).

4. Three jaw diameter measuring head according to claim 1, characterized in that the mating part (51) and the sliding guide part (27) are formed as a groove and ridge mating structure.

5. Three-jaw diameter measuring head according to claim 1, characterized in that the stop (3) is fixed by means of a screw (31) connection to a first threaded hole (22) provided in the bottom of the chute (21).

6. The three-jaw diameter measuring head according to claim 1, wherein a tapered surface (50) is formed on one end side of the contact (5) obliquely crossing the mating portion (51), and a thrust portion (52) is provided protruding from the bottom of the contact (5).

7. Three-jaw diameter measuring head according to claim 1, characterized in that the hollow (28) surrounded by three sector-shaped blocks (23) above the central hole (25) has a larger diameter than the conical head (11).