Hole depth measuring tool for thin and deep blind hole
By designing a hole depth measuring gauge for fine and deep blind holes, the problem that traditional methods are difficult to accurately measure the depth of fine and deep blind holes is solved, and efficient and accurate hole depth measurement is achieved. It is suitable for a variety of materials and complex shape workpieces, reducing operating costs.
Patent Information
- Application Number
- CN202421521477.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-28
AI Technical Summary
In modern industrial production, especially in the field of precision manufacturing, traditional mechanical drilling methods are difficult to accurately measure the depth of fine and deep blind holes, resulting in inconsistent hole depth and affecting product quality.
A fine-deep blind hole depth measuring tool is designed, including a measuring rod, a ruler, a slidable support rod and a guard, as well as a removable support and extrusion assembly. Through the combination and synergy of these components, the precise measurement of the fine-deep blind hole is achieved.
The gauge can quickly and accurately measure the depth of fine and deep blind holes, improve measurement efficiency and accuracy, reduce human operation errors, and adapt to the measurement needs of workpieces of different materials and complex shapes, reducing operating costs.
Smart Images
Figure CN222837509U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hole rulers, in particular to a hole depth measuring tool for fine and deep blind holes. Background Art
[0002] Depth measurement of fine and deep blind holes is an extremely critical link in modern industrial production, especially in the field of precision manufacturing. In the traditional mechanical drilling method, although the cost is low and the adaptability is strong, this method may cause changes in hole depth due to equipment uncertainty. Especially in the case of mass production, the failure of the depth of individual holes to meet the standard may cause the entire product to fail.
[0003] In order to monitor and control the key technical indicator of hole depth and ensure product quality, the depth of blind holes must be accurately measured. However, the challenge of this task lies in the small diameter of the hole, the low diameter-to-depth ratio and the requirement for measurement efficiency.
[0004] In order to solve this problem, researchers have proposed a variety of measurement schemes. For example, by combining a precision transmission mechanism and an optical endoscope system, it is possible to move linearly in a limited deep cavity, obtain blind hole images through high-resolution camera technology, and then complete the measurement of the shape and position dimensions of the deep cavity blind hole through image processing technology. This optical-mechanical composite high-precision non-contact photoelectric imaging detection method not only improves the measurement accuracy, but also improves the measurement efficiency and reduces human operation errors. In addition, the drilling strain method is also a commonly used measurement method. It measures the residual stress by generating release strain around the blind hole, and then calculates the hole depth. Although this method is a destructive test, it is easy to operate, has high measurement accuracy, and causes less damage to the weldment. Therefore, it has been widely used in engineering. However, the above methods are costly, complex to operate, and easily cause damage to the blind hole and measuring tools. It is difficult to observe in places with narrow vision, which increases the difficulty of measurement. Utility Model Content
[0005] The utility model aims to provide a fine and deep blind hole depth measuring tool to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fine and deep blind hole depth measuring tool, comprising a measuring rod, a ruler rod is arranged at the top end of the measuring rod, a slidable support rod is arranged on the inner wall of the ruler rod, a protective tube is arranged at the bottom end of the support rod, a slidable ruler ring is arranged on the outer wall of the ruler rod, a handle is arranged at the top end of the outer wall of the ruler rod, a detachable supporting member is arranged at the top end of the handle, an extrusion assembly is arranged at the top end of the extrusion assembly, and a pressing member is arranged at the top end of the extrusion assembly.
[0007] Preferably, vertical strip grooves are provided on the left and right sides of the protective tube.
[0008] Preferably, the bottom end of the ruler rod is provided with a limit block corresponding to the grooves on the left and right sides of the protective tube.
[0009] Preferably, the left and right sides of the bottom end of the protective tube are provided with protrusions, and the left and right sides of the bottom of the inner wall of the ruler rod are provided with grooves that cooperate with the left and right sides of the protrusions on the bottom end of the protective tube.
[0010] Preferably, the bottom end of the ruler ring is semi-cylindrical, the left and right sides of the front surface of the ruler ring are provided with scales, and the outer wall of the ruler rod is provided with scale lines that can be used in conjunction with the left and right sides of the front surface of the ruler ring.
[0011] Preferably, a cavity is provided inside the supporting member.
[0012] Preferably, the extrusion assembly includes a pressure piece, which is arranged at the bottom end of the inner wall of the pressing piece, and a semi-circular sphere is attached to the bottom end of the pressure piece, and the semi-circular sphere is arranged inside the internal cavity of the supporting piece.
[0013] Preferably, holes matching the pressure-applying member are provided inside both sides of the supporting member.
[0014] Preferably, a through hole matching the support rod is provided at the center position of the pressing member and the supporting member.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] 1. The utility model of the fine and deep blind hole depth gauge can enter a narrow space where it is difficult to observe the gauge itself due to a narrow field of vision and accurately measure the depth of the hole, thereby ensuring the precision of the parts.
[0017] 2. The fine and deep blind hole depth measuring tool of the utility model can provide measurement results quickly and efficiently, which helps to improve the overall production efficiency.
[0018] 3. The thin and deep blind hole depth measuring tool of the utility model is easy to maintain and calibrate, which helps to maintain long-term measurement accuracy, and has a small overall size and is easy to carry, while reducing operating costs.
[0019] 4. The fine and deep blind hole depth measuring tool of the utility model can adapt to the measurement requirements of workpieces of different materials and complex shapes, and enhances its application flexibility in a changing working environment.
[0020] 5. The thin and deep blind hole depth measuring tool of the utility model can effectively protect the fragile parts of the measuring tool and the thin and deep blind holes, making the overall structure more durable while reducing the wear of the blind holes of the workpiece.
[0021] 6. The fine and deep blind hole depth measuring tool of the utility model has a simple structure and is detachable in multiple places. After being used for a long time, some parts are worn out and it is more convenient to replace and maintain, which greatly reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the connection structure of the utility model;
[0023] Figure 2 It is a schematic diagram of the connection structure details when the utility model is used;
[0024] Figure 3 for Figure 1 A schematic diagram of the front section connection structure details;
[0025] Figure 4 for Figure 2 A schematic diagram of the front section connection structure details;
[0026] Figure 5 for Figure 3 Schematic diagram of some structural sections and connection details;
[0027] Figure 6 for Figure 1 Schematic diagram of the top view cross-section connection structure details.
[0028] In the figure: 1, measuring rod, 2, protective tube, 3, support rod, 4, ruler rod, 5, ruler ring, 6, handle, 7, pressing piece, 8, pressure piece, 9, semi-circular ball, 10, supporting piece. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] See also Figure 1-6 The utility model provides a technical solution: a fine and deep blind hole depth measuring tool, comprising a measuring rod 1, a ruler rod 4 is arranged at the top of the measuring rod 1, the measuring rod 1 is used to be inserted into the blind hole to measure the hole depth, the outer wall of the ruler rod 4 is provided with a slidable ruler ring 5, the ruler ring 5 is used for the measuring rod 1 to be inserted into the fine and deep blind hole to measure the hole depth, the bottom end of the ruler ring 5 contacts the surface of the workpiece and slides under the influence of the reaction force to further complete the measurement work, the outer wall top of the ruler rod 4 is provided with a handle 6, the handle 6 is used to be held by hand for easy picking.
[0031] Specifically, a slidable support rod 3 is provided on the inner wall of the ruler rod 4, and a protective tube 2 is provided at the bottom end of the support rod 3. The protective tube 2 is used to protect the measuring rod 1 so that it is less subject to wear such as bumps. The support rod 3 is connected to the protective tube 2. The support rod 3 is used to slide up and down while driving the protective tube 2 to slide up and down to ensure synchronous sliding. A detachable supporting member 10 is provided at the top of the handle 6. An extrusion assembly is provided at the top of the supporting member 10. The supporting member 10 is used to load the extrusion assembly. At the same time, the supporting member 10 is detachable to facilitate future maintenance of the tool and installation of internal parts. The extrusion assembly is used to squeeze the support rod 3 to ensure the fixation of the support rod 3. A pressing member 7 is provided at the top of the extrusion assembly. The pressing member 7 is used to facilitate pressing to apply pressure to the extrusion assembly so that the extrusion assembly completes the fixation of the support rod 3.
[0032] The left and right sides of the bottom of the protective tube 2 are provided with vertical strip grooves, and the strip grooves on the left and right sides of the protective tube 2 play a limiting role to ensure that the protective tube 2 can only slide at the corresponding position inside the ruler rod 4. The bottom end of the ruler rod 4 is provided with limit blocks corresponding to the grooves on the left and right sides of the protective tube 2. The limit blocks at the bottom end of the ruler rod 4 can ensure that the protective tube 2 stops sliding when it slides to the corresponding position to ensure that the protective tube 2 is prevented from slipping and the protective tube 2 can better complete the protection work. The left and right sides of the bottom end of the protective tube 2 are provided with protrusions, and the left and right sides of the bottom of the inner wall of the ruler rod 4 are provided with grooves used in conjunction with the protrusions on the left and right sides of the bottom end of the protective tube 2. The protrusions on the left and right sides of the bottom end of the protective tube 2 cooperate with the grooves on the left and right sides of the bottom of the inner wall of the ruler rod 4 to make the two slide synchronously. When the support rod 3 and the extrusion assembly are completed, the protective tube 2 and the ruler rod 4 can be fixed in the corresponding position after the measuring rod is inserted into the blind hole, which can prevent the measuring rod 1 and the blind hole from collision and better preserve the measurement results for the convenience of workers to view.
[0033] The bottom end of the ruler ring 5 is semi-cylindrical, and the semi-cylindrical setting of the bottom end of the ruler ring 5 can ensure a more intuitive display of the measurement results. The left and right sides of the front surface of the ruler ring 5 are provided with scales, and the outer wall of the ruler rod 4 is provided with scales that can be used in conjunction with the scales on the left and right sides of the front surface of the ruler ring 5. When the scales on the left and right sides of the front surface of the ruler ring 5 and the scales on the outer wall of the ruler rod 4 are used in conjunction with each other, if the two are aligned, the blind hole depth is qualified, and if the two are not aligned, the blind hole depth is unqualified.
[0034] A cavity is provided inside the supporting member 10, and the cavity inside the supporting member 10 is used to store the semicircular ball 9 and also enables the semicircular ball 9 to move only at a corresponding position to ensure that the work is completed.
[0035] More specifically, the extrusion assembly includes a pressure piece 8, which is arranged at the bottom end of the inner wall of the pressing piece 7. The pressure piece is used to receive the pressure of the pressing piece 7 and apply pressure to the semi-circular sphere 9. The bottom end of the pressure piece 8 is attached with the semi-circular sphere 9. The semi-circular sphere 9 is used to receive the pressure of the pressure piece 8 and apply pressure to the support rod 3 to complete the fixing of the support rod 3. The semi-circular sphere 9 is arranged inside the internal cavity of the supporting piece 10.
[0036] It should be noted that holes matching the pressure piece 8 are provided inside the two sides of the supporting member 10, and the holes inside the two sides of the supporting member 10 are used for the pressure piece 8 to slide up and down in the holes to ensure that the pressure piece 8 transfers the pressure to the semicircular ball 9 after receiving the pressure applied by the pressing member 7. Through holes matching the support rod 3 are provided at the center of the pressing member 7 and the supporting member 10, and the holes in the center of the pressing member 7 and the supporting member 10 are used for the support rod 3 to slide up and down smoothly.
[0037] Working principle:
[0038] When measuring the depth of a thin and deep blind hole, the measuring tool needs to be installed first. First, the support rod 3 and the protective tube 2 are inserted from the center of the top of the handle 6 through the center of the ruler rod 4 toward the bottom of the vector rod 1. Then, the pressing piece 7, the pressure piece 8, the semicircular ball 9 and the supporting piece 10 are passed through the support rod 3 through the center through holes of the pressing piece 7 and the supporting piece 10 and placed in the corresponding grooves of the handle 6. Then, the ruler ring 5 is inserted from the bottom end of the ruler rod 4 toward the top end of the ruler rod 4. Finally, the ruler ring 5 is rotated so that the grooves on the left and right sides of the inner wall at the bottom end of the ruler ring 5 coincide with the convex blocks on the left and right sides of the bottom end of the outer wall of the protective tube 2 to complete the installation of the overall measuring tool.
[0039] When it is necessary to measure the depth of a narrow and deep blind hole, first insert the measuring rod 1 into the blind hole. At this time, the outer wall of the top of the blind hole fits with the bottom of the protective tube 2 and the ruler ring 5. When the measuring rod 1 is inserted further, the protective tube 2, the support rod 3 and the ruler ring 5 slide upward. At this moment, the pressing member 7 is pressed. The downward movement of the pressing member 7 drives the pressure member 8 to squeeze the semicircular ball 9. When the semicircular ball 9 is squeezed, it moves inwardly inside the supporting member 10. During the movement, the support rod 3 is squeezed and fixed, so that the protective tube 2 and the ruler ring 5 can be fixed, so that the measuring tool can be inserted into the blind hole more stably, and the measuring tool can be better protected. and blind holes. If the field of vision is wide at this time, the scale on the front surface of the ruler ring 5 and the scale lines on the outer wall of the ruler rod 4 can be directly observed, and then whether the two are aligned can be immediately confirmed. If the two are aligned, the blind hole depth is qualified. If the two are not aligned, the blind hole depth is unqualified. If the field of vision is not wide at this time and the scale on the front surface of the ruler ring 5 and the scale lines on the outer wall of the ruler rod 4 cannot be directly observed, the pressing piece 7 can be pressed to fix the position of the ruler ring 5 to save the measurement results. Then the measuring tool can be brought to a place with a wide field of vision to confirm whether the scale and the scale lines are aligned and whether the blind hole depth is qualified to complete the measurement of the fine and deep blind hole depth.
[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A fine and deep blind hole depth measuring tool, comprising a measuring rod (1), characterized in that: The top of the measuring rod (1) is provided with a ruler rod (4), the inner wall of the ruler rod (4) is provided with a slidable support rod (3), the bottom end of the support rod (3) is provided with a protective tube (2), the outer wall of the ruler rod (4) is provided with a slidable ruler ring (5), the top of the outer wall of the ruler rod (4) is provided with a handle (6), the top of the handle (6) is provided with a detachable supporting member (10), the top of the supporting member (10) is provided with an extrusion assembly, and the top of the extrusion assembly is provided with a pressing member (7).
2. A fine and deep blind hole depth measuring tool according to claim 1, characterized in that: The left and right sides of the protective tube (2) are provided with vertical strip grooves.
3. A fine and deep blind hole depth measuring tool according to claim 2, characterized in that: The bottom end of the ruler (4) is provided with limit blocks corresponding to the grooves on the left and right sides of the protective tube (2).
4. A fine and deep blind hole depth measuring tool according to claim 3, characterized in that: The left and right sides of the bottom end of the protective tube (2) are provided with protrusions, and the left and right sides of the bottom of the inner wall of the ruler (4) are provided with grooves that cooperate with the protrusions on the left and right sides of the bottom end of the protective tube (2).
5. A fine and deep blind hole depth measuring tool according to claim 4, characterized in that: The bottom end of the ruler ring (5) is semi-cylindrical, and scales are provided on both the left and right sides of the front surface of the ruler ring (5). The outer wall of the ruler rod (4) is provided with scale lines that can be used in conjunction with the scales on the left and right sides of the front surface of the ruler ring (5).
6. A fine and deep blind hole depth measuring tool according to claim 5, characterized in that: The supporting member (10) is provided with a cavity inside.
7. A fine and deep blind hole depth measuring tool according to claim 6, characterized in that: The extrusion assembly comprises a pressure member (8), wherein the pressure member (8) is arranged at the bottom end of the inner wall of the pressing member (7), a semicircular ball (9) is fitted to the bottom end of the pressure member (8), and the semicircular ball (9) is arranged inside the internal cavity of the supporting member (10).
8. A fine and deep blind hole depth measuring tool according to claim 7, characterized in that: Holes matching the pressure-applying member (8) are arranged inside the two sides of the supporting member (10).
9. A fine and deep blind hole depth measuring tool according to claim 8, characterized in that: Through holes matching the support rod (3) are provided at the center positions of the pressing piece (7) and the supporting piece (10).