Nut missing rapid detection jig

Abstract

The utility model discloses a quick detection jig for nut missing, which relates to the technical field of mechanical assembly and comprises a first guide plate, a second guide plate and a detection ejector pin, the second guide plate is connected with the first guide plate through a first support column, and the first guide plate is provided with at least one first probe mounting hole. The second guide plate is correspondingly provided with a second probe mounting hole; the detection ejector pin is slidably sleeved in the first probe mounting hole and the second probe mounting hole, the top of the detection ejector pin is provided with a limiting part, the outer diameter of the limiting part is larger than the diameter of the first probe mounting hole, and the outer diameter of the detection ejector pin is larger than the inner diameter of a detected nut and smaller than the diameter of a via hole of a shielding structure above the detected nut; the detection ejector pin is sleeved with a reset spring, and the two ends of the reset spring abut against the bottom face of the first guide plate and a spring positioning part on the periphery of the detection ejector pin respectively, so that neglected installation of the nut can be rapidly and accurately detected.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical assembly technical field more specifically, relate to a nut missing quick detection fixture. BACKGROUND

[0002] In the field of mechanical assembly, nut missing is a common quality problem, especially when the nut installation position is blocked by other components, the nut missing rate is higher.

[0003] In the prior art, the missing detection of the nut in the blocked position is mainly visual inspection and X-ray detection, wherein the manual visual inspection seriously depends on work experience, is easy to miss, and the line of sight cannot penetrate the blocking structure, resulting in a high missing rate of 15-20%, and the X-ray detection equipment has high procurement cost and poor adaptability.

[0004] In summary, how to quickly and accurately detect nut missing is a problem to be solved by the technical personnel in the field. UTILITY MODEL CONTENT

[0005] Therefore, the utility model aims at providing a nut missing quick detection fixture, which has more accurate leak detection structure and improves the missing rate and detection efficiency.

[0006] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0007] A nut missing quick detection fixture, comprising a first guide plate, a second guide plate and a detection thimble, the second guide plate is connected with the first guide plate through a first support column, the first guide plate has at least one first probe mounting hole, and the second guide plate is provided with a second probe mounting hole in correspondence;

[0008] The detection thimble is slidably sleeved in the first probe mounting hole and the second probe mounting hole, the top of the detection thimble is provided with a limiting part, the outer diameter of the limiting part is greater than the diameter of the first probe mounting hole, the outer diameter of the detection thimble is greater than the inner diameter of the measured nut and smaller than the diameter of the via of the blocking structure above the measured nut;

[0009] The detection thimble is sleeved with a reset spring, and the two ends of the reset spring are respectively in contact with the bottom surface of the first guide plate and the spring positioning part of the outer peripheral part of the detection thimble.

[0010] Preferably, the middle and lower part of the detection thimble is provided with a limiting pin hole for installing a limiting pin, and the axis of the limiting pin hole is not collinear with the axis of the detection thimble.

[0011] Preferably, the middle and lower part of the detection pin is provided with an annular positioning part, an arc-shaped positioning part or a rectangular positioning part, and the arc-shaped positioning part and the rectangular positioning part are uniformly distributed along the circumferential direction of the detection pin.

[0012] Preferably, the top of the second guide plate is provided with a limiting sleeve, the limiting sleeve is sleeved outside the detection pin, and the inner diameter of the limiting sleeve is greater than the diameter of the second probe mounting hole.

[0013] Preferably, the limiting sleeve and the second guide plate are an integral structure.

[0014] Preferably, the first probe mounting holes are uniformly distributed along the extension direction of the first guide plate, and the first support column is arranged between two adjacent first probe mounting holes.

[0015] Preferably, the first guide plate is uniformly provided with three first probe mounting holes along the extension direction, and the first support column is symmetrically arranged about the axis of the central first probe mounting hole.

[0016] Preferably, the device further comprises a top limiting plate for limiting the detection pin from being separated from the first guide plate, and the top limiting plate is arranged above the first guide plate in parallel through a second support column.

[0017] Preferably, both ends of the second support column are provided with threaded segments, the top limiting plate is threadedly connected with the top of the second support column, and the first guide plate is threadedly connected with the bottom of the second support column.

[0018] Both ends of the first support column are provided with threaded segments, the first guide plate is threadedly connected with the top of the first support column, and the second guide plate is threadedly connected with the bottom of the first support column.

[0019] Preferably, the top end of the first support column and the top end of the second support column are provided with positioning parts, the positioning part of the first support column abuts against the top surface of the first guide plate, and the positioning part of the second support column abuts against the top surface of the top limiting plate.

[0020] In use, the detection jig is arranged above the shielding structure shielding the measured nut, the detection pin is aligned with the via of the shielding structure above the measured nut, then the first guide plate is pressed down, if the detection pin is lifted by the end surface of the measured nut, it indicates that the nut is normally installed at this position, if the detection pin is normally pressed down, it indicates that the nut is missing at this position; after the detection is completed, the pressure on the first guide plate is removed, and the detection pin is automatically reset under the action of the reset spring.

[0021] The nut missing quick detection jig provided by the utility model can judge whether the nut under the shielding structure is missing through the physical contact between the detection thimble and the measured nut, compared with artificial visual inspection, the bolt leak detection result is more accurate, the missed detection rate is greatly reduced, and the detection jig structure is simple, convenient to operate, the detection time is significantly reduced, and the detection efficiency is improved.

[0022] In addition, the nut leak detection demand of different products can be met by replacing different detection thimbles, and the adaptability is high. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced, and obviously, the drawings in the following description are only the embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative labor.

[0024] Figure 1 It is a structure schematic view of the specific embodiment of the nut missing quick detection jig provided by the utility model;

[0025] Figure 2 It is a structure schematic view of the top limiting plate;

[0026] Figure 3 It is a structure schematic view of the first guide plate;

[0027] Figure 4 It is a structure schematic view of the detection thimble;

[0028] Figure 5 It is a working schematic view of the nut missing quick detection jig.

[0029] Figures 1-5 In the middle:

[0030] 01-measured nut;02-shielding structure;1-top limiting plate;101-limiting plate bolt connection hole;2-first guide plate;201-first probe mounting hole;202-guide plate bolt connection hole;3-second guide plate;4-detection thimble;401-limiting pin hole;5-return spring;6-limiting bolt;7-first support column;8-second support column. DETAILED DESCRIPTION

[0031] 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, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0032] The core of the utility model provides a kind of nut missing quick detection fixture, leakage detection structure is more accurate, and improve the leakage rate and detection efficiency.

[0033] The nut missing quick detection fixture provided by the utility model includes first guide plate 2, second guide plate 3 and detection thimble 4, second guide plate 3 is connected with first guide plate 2 by first support column 7, first guide plate 2 at least one first probe mounting hole 201, second guide plate 3 is provided with second probe mounting hole correspondingly;

[0034] Detection thimble 4 is slidably arranged in first probe mounting hole 201 and second probe mounting hole, and the top of detection thimble 4 is provided with a limiting portion, the outer diameter of the limiting portion is greater than the diameter of first probe mounting hole 201, the outer diameter of detection thimble 4 is greater than the inner diameter of the measured nut 01 and less than the diameter of the via of the shielding structure 02 above the measured nut 01;

[0035] Detection thimble 4 is provided with reset spring 5, and the two ends of reset spring 5 respectively abut against the bottom surface of first guide plate 2 and the spring positioning portion of the outer peripheral portion of detection thimble 4.

[0036] Please refer to Figure 1 Detection thimble 4 is slidably arranged in first guide plate 2 and second guide plate 3, and first guide plate 2 and second guide plate 3 are connected by first support column 7 to form a stable and reliable rigid frame and effectively support detection thimble 4.

[0037] First support column 7 is preferably connected with first guide plate 2 by means of detachable connection such as threaded connection and pin connection, so as to replace the detection thimble 4 suitable for detection requirements of the measured nut 01 of different products.

[0038] The connection mode of first support column 7 and second guide plate 3 is not limited, which can be detachable connection, non-detachable connection or integrated structure of first support column 7 and second guide plate 3.

[0039] Detection thimble 4 includes thimble main body and limiting portion at the top, and thimble main body is slidably arranged in first probe mounting hole 201 of first guide plate 2 and second probe mounting hole of second guide plate 3, and the probe main body is used for contacting the end surface of the measured nut 01 to detect whether the nut at the place is missing or not.

[0040] The top pin body top is provided with a limiting portion, the specific shape of the limiting portion is not limited, as long as the outer diameter of the limiting portion is greater than the diameter of the first probe mounting hole 201, so that the bottom surface of the limiting portion and the top surface of the first guide plate 2 abut in the normal state, so that the detection pin 4 is stably and reliably installed on the first guide plate 2.

[0041] In order to facilitate detection, the detection pin 4 is quickly reset after detection, so as to improve the detection efficiency of the nut missing, and the detection pin 4 is provided with a reset spring 5, one end of the reset spring 5 abuts with the bottom surface of the first guide plate 2, and the other end of the reset spring 5 abuts with the spring positioning portion of the outer peripheral portion of the detection pin 4.

[0042] In the state of non-detection pressure, the reset spring 5 makes the bottom surface of the spring positioning portion of the detection pin 4 abut with the top surface of the second guide plate 3, at this time the reset spring 5 is in a natural state or a pre-compressed state, so when the detection pin 4 is lifted by the nut 01 to be detected, the reset spring 5 is compressed to accumulate elastic potential energy, so that after the detection pressure is removed, the detection pin 4 is reset.

[0043] In addition, the reset spring 5 and the spring positioning portion also have a certain limiting effect on the detection pin 4, avoiding excessive force when pressing down the detection jig, and the detection pin 4 is pulled out of the first guide plate 2 upward.

[0044] In use, please refer to Figure 5 The detection jig is arranged above the shielding structure 02 shielding the nut 01 to be detected, so that the detection pin 4 is aligned with the via of the shielding structure 02 above the nut 01 to be detected, and then the first guide plate 2 is pressed down, when the nut 01 to be detected is normally installed, since the diameter of the detection pin 4 is greater than the inner diameter of the nut 01 to be detected, the detection pin 4 abuts with the end surface of the nut 01 to be detected and is lifted, indicating that the nut at this position is normally installed; on the contrary, when the nut 01 to be detected is missing, the detection pin 4 is not hindered by the nut 01 to be detected and can be normally pressed down, indicating that the nut at this position is missing.

[0045] After the detection is completed, the pressure on the first guide plate 2 is removed, and the detection pin 4 is automatically reset under the action of the reset spring 5.

[0046] In this embodiment, by the physical contact between the detection pin 4 and the nut 01 to be detected, it is judged whether the nut below the shielding structure 02 is missing, compared with artificial visual inspection, the bolt missing detection result is more accurate, the missing detection rate is greatly reduced, and the detection jig structure is simple and convenient to operate, which significantly reduces the detection time and improves the detection efficiency.

[0047] In addition, by replacing different detection pins 4, the nut missing detection demand of different products can be met, and the adaptability is strong.

[0048] Preferably, the first probe mounting hole 201 of the first guide plate 2 is set as a stepped guide hole to improve the guiding accuracy and the anti-bias load capacity of the first probe mounting hole 201 to the detection stylus 4.

[0049] On the basis of the above-mentioned embodiments, the structure of the detection stylus 4 is limited, and the middle and lower part of the detection stylus 4 is provided with a limiting pin hole 401 for mounting the limiting pin 6, and the axis of the limiting pin hole 401 is not collinear with the axis of the detection stylus 4.

[0050] The specific structure and shape of the limiting pin 6 are not limited, and in order to facilitate the processing of the limiting pin hole 401, the limiting pin 6 is preferably set as a cylindrical pin, and the axis of the limiting pin hole 401 is collinear with the axis of the detection stylus 4, as shown in Figure 4 .

[0051] In this embodiment, the limiting pin 6 is used as the spring positioning part of the detection stylus 4, which not only meets the installation requirements of the return spring 5, but also cooperates with the first guide plate 2 to limit the axial upward movement of the detection stylus 4 and prevent the detection stylus 4 from coming out, and the limiting pin 6 and the return spring 5 form a double constraint mechanism of the detection stylus 4, which is beneficial to shorten the reset response time of the detection stylus 4 and improve the service life.

[0052] Of course, the middle and lower part of the detection stylus 4 can also be provided with an annular positioning part, an arc-shaped positioning part or a rectangular positioning part, and the arc-shaped positioning part and the rectangular positioning part are uniformly distributed along the circumferential direction of the detection stylus 4, and the annular positioning part, the arc-shaped positioning part or the rectangular positioning part protruding from the outer circumferential surface of the stylus body is used as the spring positioning part and the limiting structure of the detection stylus 4.

[0053] In addition, a limiting sleeve can also be provided on the top of the second guide plate 3, the limiting sleeve is sleeved on the outside of the detection stylus 4, the inner diameter of the limiting sleeve is greater than the diameter of the second probe mounting hole, and the outer diameter of the limiting sleeve is greater than the inner diameter of the return spring 5, so that the return spring 5 abuts against the limiting sleeve.

[0054] The above-mentioned limiting sleeve can be set as a steel sleeve, a plastic sleeve, a rubber sleeve and the like, and the above-mentioned limiting sleeve is used as the spring positioning part of the detection stylus 4, and when the limiting sleeve and the detection stylus 4 are tightly matched, if the limiting sleeve is made of elastic material such as rubber, the limiting sleeve can also play a limiting role on the detection stylus 4.

[0055] In order to facilitate the assembly of the detection jig, the limiting sleeve is preferably set as an integral structure with the second guide plate 3; however, it should be noted that at this time, the limiting sleeve and the detection stylus 4 are only in sliding connection, and the limiting sleeve does not move axially with the detection stylus 4, and does not have a limiting effect on the detection stylus 4.

[0056] On the basis of the above-mentioned embodiments, in order to further improve the detection efficiency of the nut missing, two, three or even more detection pins 4 can be arranged in the detection jig, the first probe mounting hole 201 is uniformly distributed along the extension direction of the first guide plate 2, and the first supporting column 7 is arranged between the adjacent two first probe mounting holes 201, as shown in Figure 1

[0057] It can be understood that when the measured nut 01 of the product is not uniformly distributed, the first probe mounting hole 201 of the first guide plate 2 is also non-uniformly distributed along the extension direction.

[0058] In the embodiment, by arranging a plurality of detection pins 4 in the detection jig, the synchronous detection of a plurality of measured nuts 01 is realized, the detection efficiency of the nut missing is significantly improved, and the detection time of a single product is greatly shortened.

[0059] In a specific embodiment, please refer to Figure 1 , the first guide plate 2 is uniformly provided with three first probe mounting holes 201 along the extension direction, the first supporting column 7 is symmetrically arranged about the axis of the central first probe mounting hole 201, and the design of the three detection pins 4 makes the detection jig have three contact points with the product, forming three-point positioning and support, and the jig has higher stability and reliability during detection.

[0060] On the basis of the above-mentioned embodiments, the detection jig further comprises a top limiting plate 1 for limiting the detection pin 4 from separating from the first guide plate 2, and the top limiting plate 1 is arranged above the first guide plate 2 in parallel through the second supporting column 8.

[0061] In order to facilitate the replacement of the detection pin 4, the second supporting column 8 is preferably connected with the top limiting plate 1 through thread connection, pin connection or the like; the connection mode of the second supporting column 8 and the first guide plate 2 is not limited.

[0062] In a specific embodiment, the two ends of the second supporting column 8 can be provided with threaded segments, the top limiting plate 1 is threadedly connected with the top of the second supporting column 8, and the guide plate bolt connection hole 202 of the first guide plate 2 is threadedly connected with the bottom of the second supporting column 8.

[0063] The two ends of the first supporting column 7 are provided with threaded segments, the top of the first supporting column 7 is threadedly connected with the first guide plate 2, and the bottom of the first supporting column 7 is threadedly connected with the second guide plate 3.

[0064] Please refer to Figure 2 and Figure 3 ​The top limiting plate 1 is provided with limiting plate bolt connecting holes 101 at both ends thereof for mounting the second support column 8, and the first guide plate 2 is provided with first guide bolt connecting holes for mounting the first support column 7 and second guide bolt connecting holes for mounting the second support column 8, which are collectively referred to as guide plate bolt connecting holes 202.

[0065] The diameters of the first guide bolt connecting holes and the second guide bolt connecting holes can be the same or different, as shown in Figure 3 which needs to be determined according to the structures and sizes of the first support column 7 and the second support column 8 in actual production.

[0066] Preferably, the top ends of the first support column 7 and the second support column 8 are each provided with a positioning portion, the positioning portion of the first support column 7 abuts against the top surface of the first guide plate 2, and the positioning portion of the second support column 8 abuts against the top surface of the top limiting plate 1.

[0067] It should be noted that the first guide plate 2 and the second guide plate 3, the first support column 7 and the second support column 8, the first probe mounting hole 201 and the second probe mounting hole, and the first guide bolt mounting hole and the second guide bolt mounting hole mentioned in the present application file are only used to distinguish the difference in position, and do not contain the limitation of the order.

[0068] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts between various embodiments can be referred to each other.

[0069] The nut missing quick detection jig provided by the present application is described in detail above. The principle and implementation mode of the present application are described by applying specific examples in this paper, and the description of the above embodiments is only used to help understand the method and core idea of the present application. It should be pointed out that for ordinary skilled persons in the technical field, on the premise of not departing from the principle of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A nut absence quick detection jig, characterized in that, Including first guide plate (2), second guide plate (3) and detection with thimble (4), the second guide plate (3) is connected with the first guide plate (2) through first support column (7), the first guide plate (2) at least one first probe mounting hole (201), the second guide plate (3) is equipped with second probe mounting hole correspondingly; The detection thimble (4) is slidably arranged in the first probe mounting hole (201) and the second probe mounting hole, a limiting portion is arranged at the top of the detection thimble (4), the outer diameter of the limiting portion is greater than the diameter of the first probe mounting hole (201), the outer diameter of the detection thimble (4) is greater than the inner diameter of the measured nut (01) and less than the diameter of the via of the shielding structure (02) above the measured nut (01); The detection thimble (4) is sleeved with a reset spring (5), the two ends of the reset spring (5) are respectively in contact with the bottom surface of the first guide plate (2) and the spring positioning portion of the outer peripheral portion of the detection thimble (4).

2. The nut absence quick detection jig according to claim 1, wherein A limiting pin hole (401) for mounting a limiting pin (6) is arranged at the middle lower portion of the detection thimble (4), the axis of the limiting pin hole (401) is not collinear with the axis of the detection thimble (4).

3. The nut absence quick detection jig according to claim 1, wherein The middle lower portion of the detection thimble (4) is provided with an annular positioning portion, an arc-shaped positioning portion or a rectangular positioning portion, the arc-shaped positioning portion and the rectangular positioning portion are uniformly distributed along the circumferential direction of the detection thimble (4).

4. The nut absence quick detection jig according to claim 1, wherein A limiting sleeve is arranged at the top of the second guide plate (3), the limiting sleeve is sleeved outside the detection thimble (4), and the inner diameter of the limiting sleeve is greater than the diameter of the second probe mounting hole.

5. The nut absence quick detection jig according to claim 4, wherein The limiting sleeve and the second guide plate (3) are an integral structure.

6. The nut absence quick detection jig according to any one of claims 1-5, wherein, The first probe mounting holes (201) are uniformly distributed along the extension direction of the first guide plate (2), and the first support column (7) is arranged between two adjacent first probe mounting holes (201).

7. The nut absence quick detection jig according to claim 6, wherein The first guide plate (2) is uniformly provided with three first probe mounting holes (201) along the extension direction, and the first support column (7) is symmetrically arranged about the axis of the central first probe mounting hole (201).

8. The nut absence quick detection jig according to any one of claims 1-5, wherein, A top limiting plate (1) for limiting the detection thimble (4) from being separated from the first guide plate (2) is further included, and the top limiting plate (1) is arranged in parallel above the first guide plate (2) through a second support column (8).

9. The nut absence quick detection jig according to claim 8, wherein, Both ends of the second support column (8) are provided with threaded segments, the top limiting plate (1) is threadedly connected with the top of the second support column (8), and the first guide plate (2) is threadedly connected with the bottom of the second support column (8). Both ends of the first support column (7) are provided with threaded segments, the first guide plate (2) is threadedly connected with the top of the first support column (7), and the second guide plate (3) is threadedly connected with the bottom of the first support column (7).

10. The nut absence quick detection jig according to claim 9, wherein, The top end of the first support column (7) and the top end of the second support column (8) are provided with positioning parts, the positioning part of the first support column (7) abuts against the top surface of the first guide plate (2), and the positioning part of the second support column (8) abuts against the top surface of the top limiting plate (1).

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