Rapid inspection fixture for electromagnetic coaxial ring

Abstract

The utility model relates to coaxial ring test piece detection technical field, more particularly to the quick inspection jig for electromagnetic coaxial ring, including base, measuring needle, upper limit detection ring, lower limit detection ring and guide bush, the measuring needle is connected to the base, and the upper limit detection ring, lower limit detection ring and guide bush are sequentially assembled to the outside of the measuring needle from top to bottom, and the upper limit detection ring, lower limit detection ring and guide bush are mutually fixed. The utility model adopts through the first cavity, and the single criterion of retention second cavity, need not reading, need not calculation, and the operator can quickly master without professional training, and the interpretation result is intuitive and correct, and the user can complete the qualification determination of two dimensions of coaxial ring outer diameter and inner diameter simultaneously through putting and observing an operation, simultaneously, the spring reset mechanism that sets, can easily eject the workpiece that has detected from the measuring needle after pressing the guide bush or detection ring, realizes the quick stripping continuous detection.

Description

Technical Field

[0001] This utility model relates to the field of coaxial ring test piece testing technology, and more specifically to a rapid testing fixture for electromagnetic coaxial rings. Background Technology

[0002] In the field of coaxial method testing of electromagnetic parameters of materials, the material under test needs to be precisely machined into a coaxial ring test piece of a specific size. These coaxial rings typically have a small outer diameter and an even smaller inner diameter (e.g., the 7mm outer diameter and 3.04mm inner diameter ring described in this application), and their requirements for dimensional and geometric tolerances (such as coaxiality and cylindricity) are extremely stringent. This is because, in the microwave frequency band, even minute dimensional deviations of the coaxial ring will directly lead to significant changes in the electromagnetic wave propagation characteristics, thereby severely affecting the accuracy and consistency of measurements of key parameters such as the complex permittivity and complex permeability of the material.

[0003] For the machining quality inspection of such high-precision, small-sized coaxial rings, two methods are currently commonly used: general manual measuring tools and high-precision coordinate measuring equipment.

[0004] General manual measuring tools, such as vernier calipers and micrometers, are used to measure the outer and inner diameters of rings. However, for tiny holes with an inner diameter of only about 3mm, the probes of conventional measuring tools are difficult to insert or cannot make stable contact, resulting in poor repeatability of measurement results and large human error. In addition, such measuring tools cannot efficiently and intuitively determine whether the workpiece is within the acceptable tolerance range, and it is even more difficult to comprehensively evaluate geometric tolerances.

[0005] High-precision coordinate measuring equipment inspection uses equipment such as coordinate measuring machines or optical imagers for measurement. Although this method can obtain high-precision, multi-dimensional dimensional and positional data, the equipment purchase and maintenance costs are high, the requirements for the operating environment and personnel skills are high, the single-piece inspection cycle is long, and the efficiency is low, which cannot meet the needs of rapid and large-scale inspection on the production site.

[0006] In summary, the existing technology lacks a dedicated inspection tool that can integrate, quickly, cost-effectively, and with high precision perform synchronous and comprehensive determination of the inner and outer diameter dimensions of small-sized coaxial rings. Utility Model Content

[0007] To address the technical problems existing in the detection of electromagnetic coaxial rings in the prior art, this utility model proposes a rapid inspection fixture for electromagnetic coaxial rings, including a base, a probe, an upper limit detection ring, a lower limit detection ring, and a guide sleeve;

[0008] The probe is connected to the base, and the upper limit detection ring, the lower limit detection ring, and the guide sleeve are assembled to the outside of the probe from top to bottom, and the upper limit detection ring, the lower limit detection ring, and the guide sleeve are fixed to each other.

[0009] Among them, the axes of the probe, the upper limit detection ring, the lower limit detection ring, and the guide sleeve are collinear;

[0010] A first detection cavity is formed on the outer wall of the probe and the inner wall of the upper limit detection ring, and a second detection cavity is formed on the outer wall of the probe and the inner wall of the lower limit detection ring. The first detection cavity and the second detection cavity are interconnected.

[0011] The inner diameter R1 of the first detection cavity is the upper limit of the outer diameter of the electromagnetic coaxial ring target, and the inner diameter R4 of the first detection cavity is the lower limit of the inner diameter of the electromagnetic coaxial ring target.

[0012] The inner diameter R2 of the second detection cavity is the lower limit of the outer diameter of the electromagnetic coaxial ring target, and the inner diameter R5 of the second detection cavity is the upper limit of the inner diameter of the electromagnetic coaxial ring target.

[0013] When the electromagnetic coaxial ring to be tested is placed into the first testing chamber, if it passes through the first testing chamber and remains in the second testing chamber, it meets the size requirements.

[0014] Preferably, the upper limit detection ring is constructed as a ring structure and has a first inner hole coaxial with the upper limit detection ring, and the lower limit detection ring is constructed as a ring structure and has a second inner hole coaxial with the lower limit detection ring. The first inner hole constitutes the outer diameter detection surface of the first detection cavity, and the second inner hole constitutes the outer diameter detection surface of the second detection cavity.

[0015] Preferably, the probe has a first diameter segment and a second diameter segment. The first diameter segment is configured to correspond to the height of the first inner hole when detecting the electromagnetic coaxial ring, and the first diameter segment constitutes the inner diameter detection surface of the first detection cavity. The second diameter segment is configured to correspond to the height of the second inner hole when detecting the electromagnetic coaxial ring, and the second diameter segment constitutes the inner diameter detection surface of the second detection cavity.

[0016] Preferably, the interface connecting the upper limit detection ring, the lower limit detection ring, and the guide sleeve is provided with a centering guide structure so that the upper limit detection ring, the lower limit detection ring, and the guide sleeve remain centered after they are connected.

[0017] Preferably, the centering guide structure includes:

[0018] A first guide ring groove and a first guide boss are provided on the lower end face of the upper limit detection ring;

[0019] A first guide groove is provided on the upper end face of the lower limit detection ring and is fitted with the first guide ring groove and the first guide boss; and a second guide ring groove and a second guide boss are provided on the lower end face of the lower limit detection ring.

[0020] A third guide ring groove is disposed on the upper end face of the guide sleeve and engages with the second guide ring groove and the second guide boss.

[0021] Preferably, the first guide boss, the first guide groove, the second guide boss, and the third guide ring groove are all provided with guide slopes.

[0022] Preferably, the guide sleeve is provided with a guide groove and a limiting groove, and the probe further includes a third diameter section and a fourth diameter section. The inner diameter R3 of the guide groove matches the outer diameter R6 of the third diameter section, and both are smaller than the inner diameter R1 of the first detection cavity. The inner diameter of the limiting groove matches the outer diameter R7 of the fourth diameter section.

[0023] Preferably, a spring is provided between the guide sleeve and the base to maintain the state of the first detection cavity and the second detection cavity. Only when any one of the upper limit detection ring, the lower limit detection ring and the guide sleeve is pressed downward, the probe moves upward relative to the upper limit detection ring and the lower limit detection ring, so that the electromagnetic coaxial ring on the outer wall of the probe disengages from the first detection cavity or the second detection cavity.

[0024] Preferably, the spring is a compression spring, and the compression of the spring is greater than the sum of the heights of the first detection cavity and the second detection cavity.

[0025] Preferably, the upper limit detection ring, the lower limit detection ring, and the guide sleeve are fixed together as a whole by multiple bolts.

[0026] Compared with the prior art, the advantages of this utility model are:

[0027] This invention employs a single criterion of passing through the first cavity and remaining in the second cavity, requiring no readings or calculations. Operators can quickly master this method without professional training, and the judgment results are intuitive and accurate. Furthermore, users can simultaneously determine the conformity of both the outer and inner diameters of the coaxial ring by inserting and observing it in one operation, combining multiple measurements into a single comprehensive judgment. In addition, the spring reset mechanism easily ejects the inspected workpiece from the probe after pressing the guide sleeve or detection ring, enabling rapid demolding and continuous inspection. Moreover, the detection ring and probe can be replaced according to different specifications of coaxial rings, making it highly versatile. The overall manufacturing cost is far lower than that of large equipment such as coordinate measuring machines, and it is easy to carry and use on-site. Attached Figure Description

[0028] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, wherein:

[0029] Figure 1This is a schematic cross-sectional view of the rapid inspection fixture for electromagnetic coaxial rings shown in this utility model.

[0030] Figure 2 This is a schematic diagram of the upper limit detection ring shown in this utility model;

[0031] Figure 3 This is a schematic diagram of the lower limit detection ring shown in this utility model;

[0032] Figure 4 This is a schematic diagram of the guide sleeve shown in this utility model;

[0033] Figure 5 This is a schematic diagram of the probe structure shown in this utility model. Detailed Implementation

[0034] To better understand the technical content of this utility model, specific embodiments are provided below in conjunction with the accompanying drawings.

[0035] Combination Figures 1 to 5 As shown, this utility model proposes a rapid inspection fixture for electromagnetic coaxial rings, including a base 1, a probe 2, an upper limit detection ring 3, a lower limit detection ring 4, and a guide sleeve 5.

[0036] The probe 2 is connected to the base 1, and the upper limit detection ring 3, the lower limit detection ring 4 and the guide sleeve 5 are assembled to the outside of the probe 2 from top to bottom, and the upper limit detection ring 3, the lower limit detection ring 4 and the guide sleeve 5 are fixed to each other.

[0037] Among them, the axes of probe 2, upper limit detection ring 3, lower limit detection ring 4 and guide sleeve 5 are collinear.

[0038] This structure, which is axially stacked and coaxially fixed, forms a stable detection reference system. With probe 2 as the central reference axis, all detection actions are performed around it. The annular space formed between the upper limit detection ring 3 and the lower limit detection ring 4 and probe 2 is the basis for size determination.

[0039] Furthermore, a first detection cavity 101 is formed on the outer wall of the probe 2 and the inner wall of the upper limit detection ring 3, and a second detection cavity 102 is formed on the outer wall of the probe 2 and the inner wall of the lower limit detection ring 4. The first detection cavity 101 and the second detection cavity 102 are interconnected.

[0040] Wherein, the inner diameter R1 of the first detection cavity 101 is the upper limit of the outer diameter of the electromagnetic coaxial ring target, and the inner diameter R4 of the first detection cavity 101 is the lower limit of the inner diameter of the electromagnetic coaxial ring target.

[0041] Wherein, the inner diameter R2 of the second detection cavity 102 is the lower limit of the outer diameter of the electromagnetic coaxial ring target, and the inner diameter R5 of the second detection cavity 102 is the upper limit of the inner diameter of the electromagnetic coaxial ring target.

[0042] It should be understood that a qualified workpiece must simultaneously meet the following requirements: First, its outer diameter is not greater than R1 (i.e., it can pass through the first detection cavity 101), and its inner diameter is not less than R4 (i.e., it can be fitted onto the first diameter segment 21 of the probe 2); Second, its outer diameter is not less than R2 (i.e., it cannot pass through the second detection cavity 102), and its inner diameter is not greater than R5 (i.e., it can be fitted onto the second diameter segment 22 of the probe 2).

[0043] Thus, when the electromagnetic coaxial ring to be tested is placed into the first detection chamber 101, if it passes through the first detection chamber 101 and remains in the second detection chamber 102, it meets the size requirements. Obviously, the workpiece can be detected and judged as meeting the target size by a single movement along a single path, which is simple and effective.

[0044] Combination Figure 1 , Figure 2 and Figure 3 As shown, the upper limit detection ring 3 is constructed as a ring structure and has a first inner hole 31 coaxial with the upper limit detection ring 3. The lower limit detection ring 4 is constructed as a ring structure and has a second inner hole 41 coaxial with the lower limit detection ring 4. The first inner hole 31 constitutes the outer diameter detection surface of the first detection cavity 101, and the second inner hole 41 constitutes the outer diameter detection surface of the second detection cavity 102.

[0045] Combination Figure 1 , Figure 5 As shown, the probe 2 has a first diameter section 21 and a second diameter section 22. The first diameter section 21 is set to correspond to the height of the first inner hole 31 when detecting the electromagnetic coaxial ring. The first diameter section 21 constitutes the inner diameter detection surface of the first detection cavity 101. The second diameter section 22 is set to correspond to the height of the second inner hole 41 when detecting the electromagnetic coaxial ring. The second diameter section 22 constitutes the inner diameter detection surface of the second detection cavity 102.

[0046] Thus, the probe 2 adopts a segmented stepped shaft design, with the diameter of each segment precisely corresponding to the limit value of the inner diameter detection. The diameter R4 of the first diameter segment 21 is the lower limit of the inner diameter, ensuring that workpieces with too small an inner diameter cannot be fitted in; the diameter R5 of the second diameter segment 22 is the upper limit of the inner diameter, ensuring that workpieces with too large an inner diameter will sink to the bottom or be tilted in the second cavity due to the excessive gap, affecting whether its outer diameter can pass the judgment of R2.

[0047] Furthermore, the inner holes (R1, R2) of the detection ring are aligned in height with the corresponding diameter segments (R4, R5) of the probe, ensuring that the workpiece is simultaneously constrained by the inner and outer diameters at each height position during detection, simulating its assembly state in actual use, and making the detection results more meaningful for engineering applications.

[0048] Combination Figure 1As shown, the interface connecting the upper limit detection ring 3, the lower limit detection ring 4, and the guide sleeve 5 is provided with a centering guide structure, so that the upper limit detection ring 3, the lower limit detection ring 4, and the guide sleeve 5 remain aligned after they are connected.

[0049] Specifically, in combination Figures 1 to 4 As shown, the centering guide structure includes:

[0050] A first guide ring groove 32 and a first guide boss 33 are provided on the lower end face of the upper limit detection ring 3;

[0051] A first guide groove 43 is provided on the upper end face of the lower limit detection ring 4 and is fitted with the first guide ring groove 32 and the first guide boss 33; and a second guide ring groove 42 and a second guide boss 45 are provided on the lower end face of the lower limit detection ring 4.

[0052] A third guide ring groove 53 is provided on the upper end face of the guide sleeve 5 and is fitted with the second guide ring groove 42 and the second guide boss 45.

[0053] Furthermore, the first guide boss 33, the first guide groove 43, the second guide boss 45, and the third guide ring groove 53 are all provided with guide slopes.

[0054] As mentioned above, the tight fit between the annular groove and the boss / recess, along with the guide ramp to guide the assembly, ensures that each component has achieved precise initial positioning before final tightening with bolt 6. This minimizes the cumulative coaxiality error that may occur when multiple parts are stacked, ensuring that after final assembly, the first inner hole 31, the second inner hole 41, and each diameter segment of the probe 2 achieve extremely high coaxiality requirements (e.g., ≤0.02mm).

[0055] In an optional embodiment, the guide sleeve 5 is provided with a guide groove 51 and a limiting groove 52. The probe 2 also includes a third diameter section 23 and a fourth diameter section 24. The inner diameter R3 of the guide groove 51 matches the outer diameter R6 of the third diameter section 23, and both are smaller than the inner diameter R1 of the first detection cavity 101. The inner diameter of the limiting groove 52 matches the outer diameter R7 of the fourth diameter section 24.

[0056] Thus, the precise fit between the guide groove 51 and the third diameter section 23 provides a precise linear guide for the movement of the entire movable component (including the upper limit detection ring 3, the lower limit detection ring 4, and the guide sleeve 5) relative to the fixed probe 2, preventing it from shaking or tilting, and ensuring that the geometric relationship of the detection cavity remains unchanged when the workpiece is pressed out.

[0057] Furthermore, a spring 7 is provided between the guide sleeve 5 and the base 1 to maintain the state of the first detection cavity 101 and the second detection cavity 102. Only when any one of the upper limit detection ring 3, the lower limit detection ring 4 and the guide sleeve 5 is pressed downward, the probe 2 moves upward relative to the upper limit detection ring 3 and the lower limit detection ring 4, so that the electromagnetic coaxial ring on the outer wall of the probe 2 disengages from the first detection cavity 101 or the second detection cavity 102.

[0058] Optionally, the spring 7 is a compression spring, and the compression of the spring 7 is greater than the sum of the heights of the first detection cavity 101 and the second detection cavity 102.

[0059] Thus, in its natural state, the spring force keeps the movable component at its highest position. At this time, the first and second detection chambers (101, 102) are in their normal working positions. After the detection is completed, simply press the movable component lightly, and the probe 2 will protrude upwards. The qualified workpiece that was originally stuck in the second detection chamber 102 or the unqualified workpiece that was stuck in the first detection chamber 101 will be easily removed due to the loss of the side support of the lower chamber, thus achieving rapid demolding.

[0060] In an optional embodiment, the upper limit detection ring 3, the lower limit detection ring 4, and the guide sleeve 5 are fixed together by multiple bolts 6.

[0061] Specifically, multiple M5 bolts are evenly arranged circumferentially for connection, ensuring connection rigidity and stability and preventing micro-movements caused by stress during use, which could affect detection accuracy. At the same time, the bolt connection facilitates disassembly and maintenance. When it is necessary to replace coaxial rings of different specifications, simply loosen the bolts and replace the upper limit detection ring 3, lower limit detection ring 4, and matching probe 2 with the corresponding inner hole size, thus achieving modularization and serialization of the inspection fixture.

[0062] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A rapid inspection fixture for electromagnetic coaxial rings, characterized in that, It includes a base (1), a probe (2), an upper limit detection ring (3), a lower limit detection ring (4), and a guide sleeve (5); The probe (2) is connected to the base (1), and the upper limit detection ring (3), the lower limit detection ring (4) and the guide sleeve (5) are assembled from top to bottom onto the outside of the probe (2), and the upper limit detection ring (3), the lower limit detection ring (4) and the guide sleeve (5) are fixed to each other; Among them, the axes of the probe (2), the upper limit detection ring (3), the lower limit detection ring (4) and the guide sleeve (5) are collinear; A first detection cavity (101) is formed on the outer wall of the probe (2) and the inner wall of the upper limit detection ring (3), and a second detection cavity (102) is formed on the outer wall of the probe (2) and the inner wall of the lower limit detection ring (4). The first detection cavity (101) and the second detection cavity (102) are interconnected. The inner diameter R1 of the first detection cavity (101) is the upper limit of the outer diameter of the electromagnetic coaxial ring target, and the inner diameter R4 of the first detection cavity (101) is the lower limit of the inner diameter of the electromagnetic coaxial ring target. The inner diameter R2 of the second detection cavity (102) is the lower limit of the outer diameter of the electromagnetic coaxial ring target, and the inner diameter R5 of the second detection cavity (102) is the upper limit of the inner diameter of the electromagnetic coaxial ring target. When the electromagnetic coaxial ring to be tested is placed into the first testing chamber (101), if it passes through the first testing chamber (101) and remains in the second testing chamber (102), it meets the size requirements.

2. The rapid inspection fixture for electromagnetic coaxial rings according to claim 1, characterized in that, The upper limit detection ring (3) is constructed as a ring structure and has a first inner hole (31) coaxial with the upper limit detection ring (3). The lower limit detection ring (4) is constructed as a ring structure and has a second inner hole (41) coaxial with the lower limit detection ring (4). The first inner hole (31) constitutes the outer diameter detection surface of the first detection cavity (101), and the second inner hole (41) constitutes the outer diameter detection surface of the second detection cavity (102).

3. The rapid inspection fixture for electromagnetic coaxial rings according to claim 2, characterized in that, The probe (2) has a first diameter segment (21) and a second diameter segment (22). The first diameter segment (21) is set to correspond to the height of the first inner hole (31) when detecting the electromagnetic coaxial ring. The first diameter segment (21) constitutes the inner diameter detection surface of the first detection cavity (101). The second diameter segment (22) is set to correspond to the height of the second inner hole (41) when detecting the electromagnetic coaxial ring. The second diameter segment (22) constitutes the inner diameter detection surface of the second detection cavity (102).

4. The rapid inspection fixture for electromagnetic coaxial rings according to claim 1, characterized in that, The interface connecting the upper limit detection ring (3), the lower limit detection ring (4), and the guide sleeve (5) is provided with a centering guide structure so that the upper limit detection ring (3), the lower limit detection ring (4), and the guide sleeve (5) remain aligned after being connected.

5. The rapid inspection fixture for electromagnetic coaxial rings according to claim 4, characterized in that, The centering guidance structure includes: The first guide ring groove (32) and the first guide boss (33) are provided on the lower end face of the upper limit detection ring (3); The first guide groove (43) is provided on the upper end face of the lower limit detection ring (4) and is fitted with the first guide ring groove (32) and the first guide boss (33), and the second guide ring groove (42) and the second guide boss (45) are provided on the lower end face of the lower limit detection ring (4); A third guide ring groove (53) is provided on the upper end face of the guide sleeve (5) and is fitted with the second guide ring groove (42) and the second guide boss (45).

6. The rapid inspection fixture for electromagnetic coaxial rings according to claim 5, characterized in that, The first guide boss (33), the first guide groove (43), the second guide boss (45) and the third guide ring groove (53) are all provided with guide slopes.

7. The rapid inspection fixture for electromagnetic coaxial rings according to claim 1, characterized in that, The guide sleeve (5) is provided with a guide groove (51) and a limiting groove (52). The probe (2) also includes a third diameter section (23) and a fourth diameter section (24). The inner diameter R3 of the guide groove (51) matches the outer diameter R6 of the third diameter section (23), and both are smaller than the inner diameter R1 of the first detection cavity (101). The inner diameter of the limiting groove (52) matches the outer diameter R7 of the fourth diameter section (24).

8. The rapid inspection fixture for electromagnetic coaxial rings according to any one of claims 1-7, characterized in that, A spring (7) is provided between the guide sleeve (5) and the base (1) to maintain the state of the first detection chamber (101) and the second detection chamber (102). Only when any one of the upper limit detection ring (3), the lower limit detection ring (4) and the guide sleeve (5) is pressed down, the probe (2) moves upward relative to the upper limit detection ring (3) and the lower limit detection ring (4), so that the electromagnetic coaxial ring on the outer wall of the probe (2) disengages from the first detection chamber (101) or the second detection chamber (102).

9. The rapid inspection fixture for electromagnetic coaxial rings according to claim 8, characterized in that, The spring (7) is a compression spring, and the compression of the spring (7) is greater than the sum of the heights of the first detection cavity (101) and the second detection cavity (102).

10. The rapid inspection fixture for electromagnetic coaxial rings according to any one of claims 1-7, characterized in that, The upper limit detection ring (3), the lower limit detection ring (4), and the guide sleeve (5) are fixed together by multiple bolts (6).

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