Inner diameter measuring device

Abstract

The utility model provides an inner diameter measuring device, which is characterized by comprising a dial indicator, a rod body, a heat insulation sleeve, a measuring rod and a fastening nut, the 0 scale side of the dial indicator is provided with an external thread connecting handle. The measuring rod is provided with an external thread connecting end; one end face of the rod body is provided with a first internal thread hole, the other end face is provided with a second internal thread hole, the rod body is directly connected with an external thread connecting handle of the dial indicator through the first internal thread hole, and the rod body is directly connected with the thread connecting end of the measuring rod through the second internal thread hole; the fastening nut is installed on the external thread connecting end of the measuring rod in a threaded connection mode and abuts against the end face of the rod body. The heat insulation sleeve is arranged on the periphery of the rod body. The inner diameter measuring device is suitable for measuring the inner diameter of a wide-range hole, is particularly suitable for measuring the inner diameter of a shallow hole end of the wide-range hole, and has the advantages of wide application range, simplicity, convenience and practicability.

Description

Technical Field

[0001] This utility model relates to the field of mechanical metrology and testing equipment technology, and in particular to an inner diameter measuring device. Background Technology

[0002] In daily production and life, measuring the inner diameter of holes in workpieces is frequently required. Current technology typically uses an inside dial indicator for this purpose. The usual practice is for the operator to hold the dial indicator and insert it into the hole. However, this method is unsuitable for some large-range, shallow-step holes. Therefore, a convenient measuring device suitable for measuring large-range, shallow-step holes is needed. Utility Model Content

[0003] In order to solve the above problems, the present invention aims to provide an extended inner diameter measuring device that is easy to operate and has a wider range of applications.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model provides an inner diameter measuring device, characterized in that it includes: a dial indicator, a rod, a heat insulation sleeve, a measuring rod, and a fastening nut; the dial indicator has an external threaded connecting handle on its 0-scale side; the measuring rod has an external threaded connecting end; one end face of the rod has a first internal threaded hole, and the other end face has a second internal threaded hole; the rod is directly connected to the external threaded connecting handle of the dial indicator through the first internal threaded hole, and the rod is directly connected to the threaded connecting end of the measuring rod through the second internal threaded hole; the fastening nut is threadedly installed on the external threaded connecting end of the measuring rod and abuts against the end face of the rod; the heat insulation sleeve is disposed on the outer periphery of the rod.

[0006] Furthermore, the inner diameter measuring device provided by this utility model may also have the following feature: the length of the rod is 30cm to 80cm.

[0007] Furthermore, the inner diameter measuring device provided by this utility model may also have the following feature: the axial length of the heat insulation sleeve is 8cm to 10cm.

[0008] Furthermore, the inner diameter measuring device provided by this utility model may also have the following feature: wherein the heat insulation sleeve is a polyurethane sleeve with a wall thickness of 2mm to 5mm.

[0009] Furthermore, the inner diameter measuring device provided by this utility model may also have the following feature: the outer wall of the measuring rod is provided with a ring of anti-slip stripes along the circumferential direction.

[0010] Furthermore, the inner diameter measuring device provided by this utility model may also have the following feature: the fastening nut is annular, and the outer circumferential wall of the fastening nut is provided with anti-slip stripes.

[0011] The beneficial effects of this utility model are:

[0012] 1. The inner diameter measuring device of this utility model is equipped with a rod body, which serves as an extension and is very convenient for measuring the inner diameter of large-scale holes. It is especially suitable for measuring the inner diameter of shallow holes with large-scale holes. It has the characteristics of wide applicability and simplicity.

[0013] 2. The inner diameter measuring device of this utility model has the characteristics of simple structure and convenient operation.

[0014] 3. The components of the inner diameter measuring device of this utility model are connected by threads, which can be quickly installed and disassembled, and it is easy to carry. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the inner diameter measuring device in an embodiment of this utility model;

[0016] Figure 2 This is an exploded view of the inner diameter measuring device in an embodiment of this utility model;

[0017] Figure 3 This is a schematic diagram of the fastening nut and measuring rod in an embodiment of this utility model. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments, in conjunction with the accompanying drawings, will specifically illustrate the technical solution of this utility model.

[0019] See Figure 1 and Figure 2 This utility model embodiment provides an inner diameter measuring device, including: a dial indicator 1, a rod 2, a heat insulation sleeve 3, a measuring rod 4, and a fastening nut 5.

[0020] The main body of dial indicator 1 is a commercially available dial indicator, which displays the measurement value via a pointer. (See reference...) Figure 2 In this embodiment, an external threaded connecting handle 11 is provided on the 0 scale side of the dial indicator 1.

[0021] See Figure 3 The measuring rod 4 is provided with an external threaded connection end 41, and the outer wall of the measuring rod 4 is provided with a ring of anti-slip stripes 42 along the circumferential direction.

[0022] See Figure 2One end face of the rod 2 has a first internal threaded hole 21, and the other end face of the rod 2 has a second internal threaded hole. The rod 2 is a cylindrical rod with a length of 30cm to 80cm, and the specific length can be made according to the needs.

[0023] The dial indicator 1 is connected to the first internal threaded hole 21 of the rod body 2 via the external threaded connecting handle 11, and the measuring rod 4 is connected to the second internal threaded hole of the rod body 2 via the external threaded connecting end 41. The fastening nut 5 is annular in shape, and its outer circumferential wall is provided with anti-slip stripes. The fastening nut 5 is threadedly installed and fixed on the external threaded connecting end 41 of the measuring rod 4, abutting against the end face of the rod body 2 to prevent the measuring rod from loosening. The overall installation of the inner diameter measuring device in this embodiment is as follows. Figure 1 As shown.

[0024] The heat insulation sleeve 3 is fixedly installed on the outer periphery of the rod body 2. The heat insulation sleeve 3 is a polyurethane sleeve with a wall thickness of 2mm to 5mm. The axial length of the heat insulation sleeve 3 is 8cm to 10cm. The heat insulation sleeve 3 is provided for the operator to hold, preventing hand temperature from being transferred to the measuring rod and causing changes in the measured value.

[0025] This embodiment of the internal diameter measuring device is applicable to the internal diameter measurement of large-range holes. It is easy to operate, and the components are connected by threads, which can be quickly installed and disassembled. It is also easy to carry.

[0026] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. An inner diameter measuring device, characterized in that, include: Dial indicator, rod, heat insulation sleeve, measuring rod, fastening nut; The dial indicator has an external threaded connecting handle on the 0 scale side; The measuring rod is provided with an external threaded connection end; The rod has a first internal threaded hole on one end face and a second internal threaded hole on the other end face. The rod is directly connected to the external threaded connecting handle of the dial indicator through the first internal threaded hole, and the rod is directly connected to the threaded connecting end of the measuring rod through the second internal threaded hole. The fastening nut is threadedly installed on the external threaded end of the measuring rod and abuts against the end face of the rod body; The heat insulation sleeve is disposed on the outer periphery of the rod.

2. The inner diameter measuring device as described in claim 1, characterized in that: in, The length of the rod is 30cm to 80cm.

3. The inner diameter measuring device as described in claim 2, characterized in that: in, The axial length of the heat insulation sleeve is 8cm to 10cm.

4. The inner diameter measuring device as described in claim 3, characterized in that: in, The heat insulation sleeve is a polyurethane sleeve with a wall thickness of 2mm to 5mm.

5. The inner diameter measuring device as described in claim 1, characterized in that: in, The outer wall of the measuring rod is provided with a ring of anti-slip stripes along the circumference.

6. The inner diameter measuring device as described in claim 1, characterized in that: in, The fastening nut is annular in shape, and the outer circumferential wall of the fastening nut is provided with anti-slip stripes.

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