Hole depth measuring device capable of adapting to various hole diameters

Abstract

The utility model discloses a hole depth measuring device capable of adapting to various hole diameters, and belongs to the technical field of mechanical cold machining. Comprising a cylindrical body and a cylindrical body arranged on the cylindrical body in a sliding and sleeving mode. A graduated scale is arranged on the outer circumferential face of the cylindrical body in the axial direction of the cylindrical body, a first conical face is arranged at the left end of the cylindrical body, a second conical face is arranged at the left end of the cylindrical body, and a third conical face is arranged at the right end of the cylindrical body. A boss is arranged at the right end of the cylindrical body, and the diameter of the boss is larger than that of the cylindrical body. And the inclination of the conical surface II is greater than that of the conical surface III. The hole depth measuring tool can be suitable for measuring hole depths of various hole diameters, the measuring efficiency is high, one-time measurement needs about 30 seconds, the measuring accuracy is high, the measuring error is smaller than 0.1 mm, the measuring accuracy is not affected by skills of users, and the problem that an existing measuring tool is large in measuring error is solved.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical cold working technology, specifically relating to a hole depth measuring device that can adapt to various hole diameters. Background Technology

[0002] Currently, there are two methods for measuring hole diameter depth. One method is to use a plug gauge, whose end face is right angled. This method is very efficient, but a plug gauge of one diameter can only be used for holes of the same diameter. If there are multiple diameter holes on site, multiple plug gauges of different diameters need to be designed. In addition, due to the chamfer or rounded corners on the end face, there is a fundamental measurement error. The other method is to use calipers. This method is inefficient, taking about 3 minutes per measurement. The accuracy of the measurement is affected by the skill of the user. Inexperienced operators may have a measurement error of more than 0.5 mm. Utility Model Content

[0003] To address the aforementioned problems, this invention provides a hole depth measuring device that is accurate, efficient, and adaptable to various hole diameters.

[0004] The technical solution adopted by this utility model is:

[0005] A hole depth measuring device adaptable to various hole diameters includes a cylindrical body and a cylindrical body slidably fitted on the cylindrical body; a scale is provided on the outer circumference of the cylindrical body along its axial direction, the left end of the cylindrical body is provided with a conical surface one, the left end of the cylindrical body is provided with a conical surface two, and the right end is provided with a conical surface three.

[0006] Furthermore, a boss is provided at the right end of the cylindrical body, and the diameter of the boss is larger than the diameter of the cylindrical body.

[0007] Furthermore, the slope of the second conical surface is greater than the slope of the third conical surface.

[0008] Compared with the prior art, the present invention has the following advantages:

[0009] This invention is applicable to hole depth measurement of various hole diameters, with high measurement efficiency (approximately 30 seconds per measurement), high measurement accuracy (measurement error less than 0.1 mm), and the measurement accuracy is not affected by the user's skill level, overcoming the problem of large measurement errors in existing measuring instruments. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Among them: 1. Cylindrical body; 101. Boss; 102. Scale; 103. Conical surface one; 2. Cylindrical body; 201. Conical surface two; 202. Conical surface three. Detailed Implementation

[0012] To better understand the purpose, structure, and function of this utility model, a more detailed description of this utility model will be provided below with reference to the accompanying drawings.

[0013] like Figure 1 As shown, this utility model provides a hole depth measuring device that can adapt to various hole diameters, including a cylindrical body 1 and a cylindrical body 2 that is slidably fitted on the cylindrical body 1; a scale 102 is provided on the outer circumference of the cylindrical body 1 along its axial direction, the left end of the cylindrical body 1 is provided with a conical surface 103, the left end of the cylindrical body 2 is provided with a conical surface 201, and the right end is provided with a conical surface 202.

[0014] A boss 101 is provided at the right end of the cylindrical body 1, and the diameter of the boss 101 is larger than the diameter of the cylindrical body 1.

[0015] The slope of the second conical surface 201 is greater than the slope of the third conical surface 202.

[0016] The drill tip angle range of conical surface 103 and conical surface 201 is 118°-140°.

[0017] When the left end of the cylindrical body 1 is aligned with the left end of the cylindrical body 2, the scale 102 protrudes from the cylindrical body 2 as the scale starting point 0, and the remaining scales follow the ruler.

[0018] The cone angles of conical surface 103 and conical surface 201 are the same as the bottom angle of the hole to be measured. The outer diameter of cylindrical body 1 is the same as the inner diameter of cylindrical body 2.

[0019] The basic operating steps are as follows:

[0020] 1. Place the end of the cylindrical body 1 with the smaller diameter, i.e. the conical surface 103, parallel and centered into the hole to be tested.

[0021] 2. Gently push the cylindrical body 2 until the conical surface 201 is in complete contact with the opening of the hole to be measured.

[0022] 3. Visually inspect the scale 102 and read the scale value of the exposed cylindrical body 2.

[0023] 4. This value is the depth of the hole to be measured.

[0024] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A hole depth measuring device adaptable to various hole diameters, characterized in that: It includes a cylindrical body (1) and a cylindrical body (2) that slides on the cylindrical body (1); the outer circumference of the cylindrical body (1) is provided with a scale (102) along its axial direction, the left end of the cylindrical body (1) is provided with a conical surface one (103), the left end of the cylindrical body (2) is provided with a conical surface two (201), and the right end is provided with a conical surface three (202).

2. The hole depth measuring device according to claim 1, which can adapt to multiple hole diameters, is characterized in that: A boss (101) is provided at the right end of the cylindrical body (1), and the diameter of the boss (101) is larger than the diameter of the cylindrical body (1).

3. The hole depth measuring device according to claim 1, which can adapt to multiple hole diameters, is characterized in that: The slope of the second conical surface (201) is greater than that of the third conical surface (202).

4. The hole depth measuring device according to claim 1, which can adapt to multiple hole diameters, is characterized in that: The drill tip angle range of the first conical surface (103) and the second conical surface (201) is 118°-140°.

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