Threaded bottom hole depth measuring gauge

Abstract

The utility model relates to a thread bottom hole depth measuring gauge, which is suitable for measuring the size of a thread bottom hole on a case by using a dial indicator, and comprises a sleeve, an auxiliary assembly, a first lining and a second lining, the two ends of the sleeve are provided with opening structures, the auxiliary assembly, the first lining and the second lining are arranged in the sleeve, and the probe end of the dial indicator is in contact connection with one end of the auxiliary assembly. The first lining is installed at one end of the sleeve and used for installing a dial indicator, and the second lining is installed at the other end of the sleeve and used for installing the auxiliary assembly in a movable mode; the auxiliary assembly comprises a measuring end, and the measuring end extends into the threaded bottom hole to adjust the reading of the dial indicator, thereby improving the precision of hole depth measurement.

Description

Technical Field

[0001] The utility model relates to the technical field of thread bottom hole measurement, in particular to a thread bottom hole depth measurement tool. Background Art

[0002] There are many threaded mounting holes on the aviation computer case. During the manufacturing process, various defects may occur due to various reasons. Among them, minor defects in parameters such as the size and depth of the mounting holes will have a great impact on the reliability of product installation. Potential defects in depth are difficult to identify with conventional tooling.

[0003] In actual operation, the measurement error of the bottom hole depth of threads with smaller hole diameters is large. Inadequate measurement will cause the effective thread depth to fail to meet the design requirements. When it comes to the assembly stage, other assembly parts may not be installed normally or may have installation defects, posing a hidden danger to the reliability of the product. Utility Model Content

[0004] In view of this, the utility model provides a thread bottom hole depth measurement inspection tool, which improves the accuracy of thread bottom hole depth measurement and reduces the misjudgment rate of the test link.

[0005] A threaded bottom hole depth measuring gauge is suitable for measuring the size of a threaded bottom hole on a chassis using a micrometer, comprising a sleeve with opening structures at both ends and an auxiliary component installed in the sleeve, a first bushing and a second bushing, wherein the probe end of the micrometer is contact-connected with one end of the auxiliary component, wherein the first bushing is installed at one end of the sleeve for installing the micrometer, and the second bushing is installed at the other end of the sleeve for movably installing the auxiliary component; the auxiliary component comprises a measuring end, and the measuring end is inserted into the threaded bottom hole to adjust the reading of the micrometer.

[0006] Preferably, a first cavity and a second cavity are spaced apart along the center line direction of the sleeve, and the first cavity and the second cavity are respectively connected to ports at both ends of the sleeve, wherein:

[0007] The first bushing is fixedly mounted in the first cavity, and the second bushing is fixedly mounted in the second cavity.

[0008] Preferably, the size of the first cavity is larger than the size of the first bushing, and the size of the second cavity is larger than the size of the second bushing, wherein:

[0009] One end portion of the auxiliary component extends into the first cavity and contacts the probe end of the micrometer, and the other end is equipped with the measuring end head, which extends out of the second bushing. The extended portion is used to measure the depth of the threaded bottom hole.

[0010] Preferably, the length of the measuring end extending from the end surface of the second bushing or sleeve is greater than the depth of the threaded bottom hole.

[0011] Beneficial Effects

[0012] By using the measuring component in conjunction with a micrometer for measurement, the misjudgment rate of the test link is reduced and the accuracy of the test link is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 is the main sectional view of the overall structure, in which:

[0015] 1. Micrometer; 11. Probe end; 2. First bushing; 3. Screw; 4. Compression spring; 5. Second bushing; 6. Measuring rod; 61. Baffle; 62. Measuring end; 63. Conical protrusion; 7. Sleeve; 71. First cavity; 72. Second cavity. DETAILED DESCRIPTION

[0016] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0017] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0018] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present disclosure, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0019] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present disclosure. The drawings only show components related to the present disclosure rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0020] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, one skilled in the art will appreciate that aspects may be practiced without these specific details.

[0021] See also Figure 1 The thread bottom hole depth measuring gauge shown is suitable for measuring the size of the thread bottom hole on the chassis using a micrometer 1, and includes a sleeve 7 with an opening structure at both ends and an auxiliary component installed in the sleeve 7, a first bushing 2 and a second bushing 5. The probe end 11 of the micrometer 1 is in contact connection with one end of the auxiliary component, wherein the first bushing 2 is installed at one end of the sleeve 7 for the installation of the micrometer 1, and the second bushing 5 is installed at the other end of the sleeve 7, and the auxiliary component is installed in a movable manner, such as a clearance fit assembly method. The auxiliary component includes a measuring end 62, and the measuring end 62 is inserted into the thread bottom hole to adjust the reading of the micrometer 1. The auxiliary component can quickly measure the hole depth of the thread bottom hole on the chassis.

[0022] As a specific embodiment provided in this case, a first cavity 71 and a second cavity 72 are arranged at intervals along the center line direction of the sleeve 7, and the first cavity 71 and the second cavity 72 are respectively connected to the ports at both ends of the sleeve 7, wherein the first cavity 71 is fixedly installed with the first bushing 2, and the second cavity 72 is fixedly installed with the second bushing 5. Preferably, the size of the first cavity 71 is larger than the size of the first bushing 2, and the size of the second cavity 72 is larger than the size of the second bushing 5, wherein,

[0023] One end portion of the auxiliary component extends into the first cavity 71 and contacts the probe end 11 of the micrometer 1, and the other end is equipped with a measuring end 62, which partially extends out of the second bushing 5, and the extended portion is used to measure the depth of the threaded bottom hole. In addition, the length of the measuring end 62 extending out of the second bushing 5 or the end face of the sleeve 7 is greater than the depth of the threaded bottom hole. In order to avoid unstable readings of the micrometer 1, when in use, the end face of the sleeve 7 (or the second bushing 5) is flush with the hole mouth surface of the threaded bottom hole, and then the reading of the micrometer 1 is read to complete the measurement of the hole depth.

[0024] As a specific implementation scheme provided in this case, the auxiliary component includes a measuring rod 6 and a compression spring 4 installed on the measuring rod 6, the measuring rod 6 is assembled in a clearance manner (the measuring rod 6, the sleeve 7 and the second bushing 5 are all assembled in a clearance fit manner), wherein one end of the measuring rod 6 is in contact with the probe end 11 of the micrometer 1, and the other end is installed with a measuring end 62, and a baffle 61 is provided at a preset position of the measuring rod 6, the baffle 61 is used to prevent the measuring rod 6 from falling off from the sleeve 7, (the preset position is in the common area of ​​the second bushing 5 and the second cavity 72), the two ends of the compression spring 4 resist between the baffle 61 and the bottom surface of the second cavity 72, when measuring the distance of the measuring end 62, when the reading of the micrometer 1 does not change, the reading of the micrometer 1 is read to determine the depth of the threaded bottom hole.

[0025] In order to improve the measurement accuracy, the center lines of the micrometer, the probe end 11, the measuring rod 6 and the measuring end 62 coincide with the center line of the sleeve 7 to prevent the components from being offset during assembly.

[0026] The first bushing 2 and the second bushing 5 mentioned above are fixedly mounted on the sleeve 7 by screws 3, one end of the measuring rod 6 extends into the first cavity 71 and engages with the probe end 11 of the micrometer 1, and the other end is assembled in the second bushing 5 in a clearance fit manner.

[0027] To ensure stable contact with the micrometer, a conical protrusion 63 is provided at one end of the measuring rod 6. The area of ​​the large surface of the conical protrusion 63 is larger than the cross-sectional area of ​​the probe end 11, ensuring uniform force during measurement and avoiding inaccurate readings of the micrometer 1. To ensure the accuracy of measurement and improve the versatility of the measuring tool, the diameter φ of the exposed part of the measuring rod is 0.08-0.15mm smaller than the diameter φ of the measured thread bottom hole, and the depth is 1-2mm larger than the measured thread bottom hole. The measurement method is that the length of the measuring end extending from the end face of the second bushing or sleeve is Amm, and the reading of the micrometer is Bmm. When the measuring end is used for measurement, the depth of the thread bottom hole is (AB) mm.

[0028] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A thread bottom hole depth measuring fixture, suitable for measuring the size of the thread bottom hole on the chassis using a micrometer, characterized in that: It comprises a sleeve with two ends open and an auxiliary component installed in the sleeve, a first bushing and a second bushing, wherein the probe end of the micrometer is in contact connection with one end of the auxiliary component, wherein: The first bushing is mounted on one end of the sleeve for mounting a micrometer, and the second bushing is mounted on the other end of the sleeve for movably mounting the auxiliary component; The auxiliary component comprises a measuring end head, and the measuring end head is inserted into the threaded bottom hole to adjust the reading of the micrometer.

2. The thread bottom hole depth measuring fixture according to claim 1 is characterized in that: A first cavity and a second cavity are arranged at intervals along the center line direction of the sleeve, and the first cavity and the second cavity are respectively connected to ports at both ends of the sleeve, wherein: The first bushing is fixedly mounted in the first cavity, and the second bushing is fixedly mounted in the second cavity.

3. The thread bottom hole depth measuring tool according to claim 2 is characterized in that: The size of the first cavity is larger than the size of the first bushing, and the size of the second cavity is larger than the size of the second bushing, wherein: One end portion of the auxiliary component extends into the first cavity and contacts the probe end of the micrometer, and the other end is equipped with the measuring end head, which extends out of the second bushing. The extended portion is used to measure the depth of the threaded bottom hole.

4. The thread bottom hole depth measuring tool according to claim 3 is characterized in that: The length of the measuring end extending from the end surface of the second bushing or sleeve is greater than the depth of the threaded bottom hole.

5. The thread bottom hole depth measuring tool according to claim 3 is characterized in that: The auxiliary assembly comprises a measuring rod and a compression spring mounted on the measuring rod, the measuring rod being assembled in a gap manner, wherein: One end of the measuring rod is in contact with the probe end of the micrometer, and the other end is installed with the measuring head; a baffle is provided at a preset position of the measuring rod, and both ends of the compression spring resist between the baffle and the bottom surface of the second cavity; When measuring the distance of the measuring end, when the reading of the micrometer does not change, read the reading of the micrometer to determine the depth of the thread bottom hole.

6. The thread bottom hole depth measuring tool according to claim 5 is characterized in that: The center line of the micrometer, the probe end, the measuring rod and the measuring end coincides with the center line of the sleeve.

7. The thread bottom hole depth measuring tool according to claim 5 is characterized in that: The first bushing and the second bushing are both fixedly mounted on the sleeve by screws.

8. The thread bottom hole depth measuring tool according to claim 5, characterized in that: One end of the measuring rod extends into the first cavity and into the probe end of the micrometer, and the other end is assembled in the second bushing in a clearance fit manner.

9. The thread bottom hole depth measuring tool according to claim 8, characterized in that: A conical protrusion is arranged at one end of the measuring rod, and the area of ​​the large surface of the conical protrusion is larger than the cross-sectional area of ​​the probe end.

10. The thread bottom hole depth measuring tool according to claim 9, characterized in that: The length of the measuring end extending out of the second bushing or sleeve end face is A, the reading of the micrometer is B, and when the measuring end is used for measurement, the hole depth of the threaded bottom hole is AB.

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