Precision test probe for spherical surface

Abstract

The utility model relates to the field of precision test probes, and discloses a precision test probe for a spherical surface, which comprises a rod sleeve and a probe rod, the top end of the rod sleeve is provided with an upper port, the bottom end of the rod sleeve is provided with a lower port, the upper port and the lower port penetrate through the rod sleeve, the bottom end of the probe rod is provided with a probe head, and the probe head is connected with the rod sleeve. And the central point and four corners of the needle head are pointed cones and form five groups of contacts. According to the precision test probe for the spherical surface, the probe rod, the probe head and the contacts are arranged, the center point and the four corners of the probe head are each of a pointed cone structure, five sets of independent contacts are formed, when the probe is in contact with the spherical metal surface, the five sets of contacts can be flexibly attached according to changes of the radian of the spherical surface, and even if the spherical surface is slightly irregular, the contact points can not be damaged. And at least three groups of contacts can be ensured to form an effective circuit path, so that the contact stability of the spherical metal product is enhanced, the slippage phenomenon possibly caused by pressure change in plane contact is avoided, and the problem of inaccuracy of test data caused by insufficient contact points is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to precision test probe technical field, specifically for a kind of precision test probe for spherical surface. BACKGROUND

[0002] Precision test probe is mainly used to measure the precision of the surface of various shapes objects. Especially in the field of high-precision manufacturing, such as aerospace, electronic equipment, precision machining, etc., the test probe needs to be in full contact with the surface of the measured object, and accurate data is obtained through circuit conduction, shape scanning and other means.

[0003] However, there are certain defects in the current precision test probe for spherical surface. Traditional probes usually use single-point or few-point contact design, which causes the contact points to not fully adhere to the spherical surface when the probe contacts the spherical surface, resulting in inaccurate data. Insufficient number of contact points can easily lead to unstable contact circuit, especially when detecting metal spherical surface, slight vibration or slip may interrupt the circuit conduction, affecting the reliability of the detection results.

[0004] Therefore, a precision test probe for spherical surface is needed to solve the above technical defects. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a kind of precision test probe for spherical surface to solve the problem of inaccurate test data caused by insufficient contact points when the probe contacts the spherical surface as proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of precision test probe for spherical surface, including rod sleeve and needle rod, the top of rod sleeve is machined with upper port, the bottom of rod sleeve is machined with lower port, the upper port and lower port pass through rod sleeve, the bottom of needle rod is machined with needle head, the center point and four corners of needle head are all sharp cone and form five groups of contact points.

[0007] As a further technical scheme of the utility model, the inner wall of the upper port is machined with internal threads, the outer wall of the upper part of the needle rod is machined with external threads, the pipe wall near the lower port of the rod sleeve is provided with a slide, the lower half of the outer wall of the needle rod is welded with a sliding block, the sliding block is embedded in the slide and slides, and the external threads and internal threads form a threaded connection.

[0008] As a further technical scheme of the utility model, the inner wall of the upper port of the rod sleeve is machined with a set of positioning grooves, and the length of the needle rod is 0.5mm.

[0009] As a further technical scheme of the utility model, the slide is a semicircular groove, and the slide extends from the front end of the rod sleeve to the rear end of the rod sleeve.

[0010] As a further technical scheme of the utility model, the mounting ring hoop is hingedly connected with two arc-shaped pieces, and the mounting ring hoop is fixedly connected with a fixing bolt.

[0011] As a further technical scheme of the utility model, the mounting ring hoop is hingedly connected with two arc-shaped pieces, and the mounting ring hoop is fixedly connected with a fixing bolt.

[0012] Compared with the prior art, the utility model has the advantages that the precision testing probe for spherical surfaces not only realizes sufficient contact according to the spherical arc, improves the accuracy and reliability of testing, realizes the quick assembly and disassembly of the probe, and realizes overall installation, thereby avoiding the problem of probe loosening caused by vibration or long-time use.

[0013] (1) The center point and four corners of the needle head are in the form of sharp taper structure, and five groups of independent contact points are formed, which can be flexibly fitted according to the change of the spherical arc when contacting the spherical metal surface, so that at least three groups of contact points can form effective circuit paths even if the spherical surface is slightly irregular, thereby avoiding the problem of inaccurate test data caused by insufficient contact points, enhancing the contact stability, avoiding the sliding phenomenon caused by pressure change in plane contact, and improving the accuracy and reliability of testing.

[0014] (2) The probe is designed in a nested structure, the needle rod and the rod sleeve are stably connected and cannot be easily separated, and the quick assembly and disassembly of the probe are realized.

[0015] (3) The mounting foot, the mounting ring hoop and the fixing bolt are arranged, the mounting foot is connected with the detection head, when replacement is needed, the mounting ring hoop and the fixing bolt can be directly disassembled, the whole probe assembly including the needle rod and the rod sleeve can be taken out together, the components do not need to be disassembled one by one, the stability is maintained in high-frequency testing, and the problem of probe loosening caused by vibration or long-time use is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view structural schematic diagram of the utility model;

[0017] Figure 2 It is a rod sleeve side view structural schematic diagram of the utility model;

[0018] Figure 3 It is a needle rod front view structural schematic diagram of the utility model;

[0019] Figure 4 It is an upper port top view sectional structural schematic diagram of the utility model;

[0020] Figure 5 It is the installation ring hoop overhead structure schematic view of the utility model;

[0021] Figure 6 It is the needle head overhead structure schematic view of the utility model.

[0022] In the drawing: 1, needle rod; 2, external thread; 3, installation ring hoop; 4, rod sleeve; 5, slide; 6, sliding block; 7, upper port; 8, lower port; 9, needle head; 10, internal thread; 11, positioning groove; 12, fixing bolt; 13, installation foot; 14, contact. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0024] Please refer to Figures 1-6 The utility model provides an embodiment: a kind of precision test probe for spherical surface, including rod sleeve 4 and needle rod 1, rod sleeve 4 top end is processed with upper port 7, rod sleeve 4 bottom end is processed with lower port 8, upper port 7 and lower port 8 pass through rod sleeve 4, needle rod 1 bottom end is processed with needle head 9, and the center point and four corners of needle head 9 are all sharp cone shape and form five groups of contacts 14;

[0025] Specifically, as Figure 1 , Figure 2 , Figure 3 And Figure 6 Indicated, the center point and four corners of needle head 9 are all sharp cone structure, and form five groups of independent contacts 14, when contact with spherical metal surface, five groups of contacts 14 can flexibly adhere according to the change of spherical arc, even if spherical surface is slightly irregular, at least three groups of contacts 14 can also be ensured to form effective circuit path.

[0026] Upper port 7 inner wall is processed with internal thread 10, needle rod 1 upper part outer wall is processed with external thread 2, rod sleeve 4 is close to lower port 8 position pipe wall and is provided with slide 5, needle rod 1 lower half outer wall is welded with sliding block 6, sliding block 6 is embedded in slide 5 and slides, external thread 2 and internal thread 10 form threaded connection, rod sleeve 4 is processed with a group of positioning grooves 11 in upper port 7 inner wall, needle rod 1 length is 0.5mm, slide 5 is semicircular groove, and slide 5 extends from the front end of rod sleeve 4 to the rear end of rod sleeve 4;

[0027] Specifically, as Figure 1 , Figure 2 , Figure 3 And Figure 4As shown, the needle rod 1 is inserted into the sleeve 4 through the upper port 7, during the insertion process, the slider 6 is aligned with the positioning slot 11 in the slide 5 and slides in, when the needle rod 1 is exposed from the lower end of the slide 5, the external thread 2 is embedded in the position of the upper port 7, then the needle rod 1 is screwed in the thread direction, so that it descends and rotates along the thread of the external thread 2, as the slider 6 slides to the end in the slide 5, the needle rod 1 and the sleeve 4 are firmly connected and cannot be easily separated.

[0028] The sleeve 4 is fixedly connected with the mounting hoop 3, the mounting hoop 3 is two groups of hinged arc-shaped pieces, the mounting hoop 3 is fixedly connected with the fixing bolt 12, the mounting hoop 3 is welded with the mounting foot 13 at the rear end, the probe is fixed to the detection head through the mounting foot 13;

[0029] Specifically, as shown in Figure 1 , Figure 2 and Figure 5 , after the probe is assembled, the sleeve 4 is fixed by using the mounting hoop 3, and the mounting hoop 3 is locked by using the fixing bolt 12, and the detection head is connected through the mounting foot 13, when it is necessary to replace, the mounting hoop 3 and the fixing bolt 12 can be directly disassembled, and the whole probe assembly including the needle rod 1 and the sleeve 4 is taken out together, without disassembling the parts one by one.

[0030] Working principle: the probe is designed as a nested structure, including the needle rod 1 and the sleeve 4, the needle rod 1 is inserted into the sleeve 4 through the upper port 7, during the insertion process, the slider 6 is aligned with the positioning slot 11 in the slide 5 and slides in, when the needle rod 1 is exposed from the lower end of the slide 5, the external thread 2 is embedded in the position of the upper port 7, then the needle rod 1 is screwed in the thread direction, so that it descends and rotates along the thread of the external thread 2, as the slider 6 slides to the end in the slide 5, the needle rod 1 and the sleeve 4 are firmly connected and cannot be easily separated, after the probe is assembled, the sleeve 4 is fixed by using the mounting hoop 3, and the mounting hoop 3 is locked by using the fixing bolt 12, and the detection head is connected through the mounting foot 13, when it is necessary to replace, the mounting hoop 3 and the fixing bolt 12 can be directly disassembled, and the whole probe assembly including the needle rod 1 and the sleeve 4 is taken out together, without disassembling the parts one by one, the probe is provided with the needle head 9 at the bottom of the needle rod 1, the center point and the four corners of the needle head 9 are all sharp conical structures, and five groups of independent contacts 14 are formed, when contacting with the spherical metal surface, the five groups of contacts 14 can flexibly fit according to the change of the spherical arc, even if the spherical surface is slightly irregular, at least three groups of contacts 14 can also ensure to form an effective circuit path, avoiding the problem that the test data is inaccurate due to insufficient contacts 14, not only enhancing the contact stability, but also avoiding the sliding phenomenon caused by the change of pressure in the plane contact.

[0031] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A precision testing probe for spherical surfaces, comprising a stem sleeve (4) and a needle stem (1), characterized in that: The top end of the rod sleeve (4) is provided with an upper port (7), and the bottom end of the rod sleeve (4) is provided with a lower port (8), the upper port (7) and the lower port (8) penetrate the rod sleeve (4), the bottom end of the needle rod (1) is provided with a needle (9), the center point and the four corners of the needle (9) are all pointed and form five groups of contact points (14).

2. The precision testing probe for spherical surfaces according to claim 1, wherein: The inner wall of the upper port (7) is provided with an internal thread (10), the outer wall of the upper part of the needle rod (1) is provided with an external thread (2), the wall of the rod sleeve (4) near the lower port (8) is provided with a slide (5), the outer wall of the lower half of the needle rod (1) is welded with a sliding block (6), the sliding block (6) is embedded in the slide (5) and slides, and the external thread (2) is in threaded connection with the internal thread (10).

3. The precision testing probe for spherical surfaces of claim 1, wherein: The rod sleeve (4) is provided with a group of positioning grooves (11) on the inner wall at the upper port (7), and the length of the needle rod (1) is 0.5mm.

4. The precision testing probe for spherical surfaces according to claim 2, wherein: The slide (5) is a semicircular groove, and the slide (5) extends from the front end of the rod sleeve (4) to the rear end of the rod sleeve (4).

5. The precision testing probe for spherical surfaces of claim 1, wherein: The rod sleeve (4) is fixedly connected with a mounting ring (3) outside, the mounting ring (3) is two groups of hinged arc-shaped pieces, and the mounting ring (3) is fixedly connected with a fixing bolt (12).

6. The precision testing probe for spherical surfaces according to claim 5, wherein: The rear end of the mounting ring (3) is welded with a mounting foot (13), and the probe is fixed to the detection head through the mounting foot (13).

Images